Biggest changeFor a discussion of the year ended December 31, 2021 compared to the year ended December 31, 2020, please refer to Part II, Item 7, "Management's Discussion and Analysis of Financial Condition and Results of Operations" in our Annual Report on Form 10-K for the year ended December 31, 2021. 82 Table of Contents Year Ended December 31, (in thousands) 2022 2021 2020 Revenue $ 516,409 $ 490,490 $ 298,845 Cost of revenue 120,386 74,091 58,468 Gross profit 396,023 416,399 240,377 Operating expenses: Research and development 265,667 211,752 123,375 In-process research and development — — 447,548 Selling, general and administrative 298,300 257,560 202,326 Accrued contingent liabilities — (660) 1,270 Total operating expenses 563,967 468,652 774,519 Loss from operations (167,944) (52,253) (534,142) Other income (expense): Interest income 6,647 206 1,532 Interest expense (476) (866) (1,682) Other (expense) income, net (198) (802) 1,337 Loss on extinguishment of debt — — (1,521) Total other income (expense) 5,973 (1,462) (334) Loss before provision for income taxes (161,971) (53,715) (534,476) Provision for income taxes 4,029 4,508 8,255 Net loss $ (166,000) $ (58,223) $ (542,731) Revenue Year Ended December 31, Change (dollars in thousands) 2022 2021 $ % Instruments $ 72,396 $ 64,474 $ 7,922 12 % Consumables 435,588 418,740 16,848 4 % Services 8,425 7,276 1,149 16 % Total revenue $ 516,409 $ 490,490 $ 25,919 5 % Revenue increased $25.9 million, or 5%, for the year ended December 31, 2022 as compared to year ended December 31, 2021.
Biggest changeFor a discussion of the year ended December 31, 2022 compared to the year ended December 31, 2021, please refer to Part II, Item 7, "Management's Discussion and Analysis of Financial Condition and Results of Operations" in our Annual Report on Form 10-K for the year ended December 31, 2022. 83 Table of Contents Year Ended December 31, (in thousands) 2023 2022 2021 Revenue $ 618,727 $ 516,409 $ 490,490 Cost of revenue 209,414 120,386 74,091 Gross profit 409,313 396,023 416,399 Operating expenses: Research and development 270,332 265,667 211,752 In-process research and development 60,980 — — Selling, general and administrative 343,330 298,300 257,560 Accrued contingent liabilities — — (660) Total operating expenses 674,642 563,967 468,652 Loss from operations (265,329) (167,944) (52,253) Other income (expense): Interest income 16,906 6,647 206 Interest expense (33) (476) (866) Other expense, net (307) (198) (802) Total other income (expense) 16,566 5,973 (1,462) Loss before provision for income taxes (248,763) (161,971) (53,715) Provision for income taxes 6,336 4,029 4,508 Net loss $ (255,099) $ (166,000) $ (58,223) Revenue Year Ended December 31, Change 2023 2022 $ % Instruments Chromium $ 47,866 $ 58,552 $ (10,686) (18) % Spatial 75,605 13,844 61,761 446 % Total instruments revenue 123,471 72,396 51,075 71 % Consumables Chromium 420,316 400,433 19,883 5 % Spatial 59,237 35,155 24,082 69 % Total consumables revenue 479,553 435,588 43,965 10 % Services 15,703 8,425 7,278 86 % Total revenue $ 618,727 $ 516,409 $ 102,318 20 % Revenue increased $102.3 million, or 20%, for the year ended December 31, 2023 as compared to year ended December 31, 2022.
Selling, general and administrative expense primarily consists of costs related to the selling and marketing of our products, including sales incentives and advertising expenses and costs associated with our finance, accounting, legal (excluding accrued contingent liabilities), human resources and administrative personnel.
Selling, general and administrative. Selling, general and administrative expense primarily consists of costs related to the selling and marketing of our products, including sales incentives and advertising expenses and costs associated with our finance, accounting, legal (excluding accrued contingent liabilities), human resources and administrative personnel.
Investing activities The net cash used in investing activities of $350.9 million in the year ended December 31, 2022 was due to purchases of marketable securities of $282.9 million, purchases of property and equipment of $131.7 million and payment of acquisition-related holdback cash and contingent consideration of $4.0 million, partially offset by proceeds from sales and maturities of marketable securities of $49.1 million and $18.5 million, respectively.
The net cash used in investing activities of $350.9 million in the year ended December 31, 2022 was due to purchases of marketable securities of $282.9 million, purchases of property and equipment of $131.7 million and payment of acquisition-related holdback cash and contingent consideration of $4.0 million, partially offset by proceeds from sales and maturities of marketable securities of $49.1 million and $18.5 million, respectively.
Financing activities The net cash provided by financing activities of $15.8 million in the year ended December 31, 2022 was primarily from proceeds of $21.2 million from the issuance of common stock from the exercise of stock options and employee stock purchase plan purchases partially offset by payments on financing arrangements of $5.4 million.
The net cash provided by financing activities of $15.8 million in the year ended December 31, 2022 was primarily from proceeds of $21.2 million from the issuance of common stock from the exercise of stock options and employee stock purchase plan purchases partially offset by payments on financing arrangements of $5.4 million.
Our commercial product portfolio leverages our Chromium X Series and Chromium Connect, which we refer to as “Chromium instruments,” our Visium CytAssist, an instrument designed to simplify the Visium solution workflow by facilitating the transfer of transcriptomic probes from standard glass slides to Visium slides, our Xenium Analyzer, an instrument designed for fully automated high-throughput analysis of cells in their tissue environment, and our proprietary microfluidic chips, slides, reagents and other consumables for our Chromium, Visium and Xenium solutions, which we refer to as “consumables.” We bundle our software with these products to guide customers through the workflow, from sample preparation through analysis and visualization.
Our commercial product portfolio leverages our Chromium X Series and Chromium Connect instruments, which we refer to as “Chromium instruments,” our Visium CytAssist, an instrument designed to simplify the Visium solution workflow by facilitating the transfer of transcriptomic probes from standard glass slides to Visium slides, and our Xenium Analyzer, an instrument designed for fully automated high-throughput analysis of cells in their tissue environment, which we refer to as “Spatial instruments,” and our proprietary microfluidic chips, slides, reagents and other consumables for our Chromium, Visium and Xenium solutions, which we refer to as “consumables.” We bundle our software with these products to guide customers through the workflow, from sample preparation through analysis and visualization.
Each of our consumables solutions is designed to allow researchers to study a different aspect of biology, such as DNA, RNA, protein or epigenetics, at a resolution and scale that may be impractical or impossible using existing tools. As each of our solutions has been introduced, they have been initially purchased by a small number of early adopters.
Each of our consumables solutions is designed to allow researchers to study a different aspect of biology, such as DNA, RNA, protein or epigenetics, at a resolution and scale that may be impractical or impossible using previously existing tools. As each of our solutions has been introduced, they have been initially purchased by a small number of early adopters.
Revenue is recorded net of discounts, distributor commissions and sales taxes collected on behalf of governmental authorities. Customers are invoiced generally upon shipment, or upon order for services, and payment is typically due within 45 days. Cash received from customers in advance of product shipment or providing services is recorded as a liability.
Revenue is recorded net of discounts, distributor commissions and sales taxes collected on behalf of governmental authorities. Customers are invoiced generally upon shipment, or upon order for services, and payment is typically due within 30 days. Cash received from customers in advance of product shipment or providing services is recorded as a liability.
Our gross profit and gross margins in future periods are expected to fluctuate from quarter to quarter and will depend on a variety of factors, including: market conditions that may impact our pricing; sales mix changes among 80 Table of Contents consumables, instruments and services; product mix changes between established products and new products; impacts of inflation and increased supply chain costs; excess and obsolete inventories; royalties; our cost structure for manufacturing operations relative to volume; and product warranty obligations.
Our gross profit and gross margins in future periods are expected to fluctuate from quarter to quarter and will depend on a variety of factors, including: market conditions that may impact our pricing; sales mix changes among consumables, instruments and services; product mix changes between established products and new products; impacts of inflation and increased supply chain costs; excess and obsolete inventories; royalties; our cost structure for manufacturing operations relative to volume; and product warranty obligations.
Our products cover a wide variety of applications and allow researchers to analyze biological systems at fundamental resolution and on massive scale, such as at the single cell level for millions of cells. Customers purchase instruments and consumables from us for use in their experiments.
Our products cover a wide variety of applications and allow researchers to analyze biological systems at fundamental resolutions and on massive scale, such as at the single cell level for millions of cells. Customers purchase instruments and consumables from us for use in their experiments.
To the extent that there are differences between our estimates and actual results, our future financial statement presentation, financial condition, results of operations and cash flows will be affected. 86 Table of Contents We believe that the accounting estimates described below involve a significant degree of judgment and complexity.
To the extent that there are differences between our estimates and actual results, our future financial statement presentation, financial condition, results of operations and cash flows will be affected. 88 Table of Contents We believe that the accounting estimates described below involve a significant degree of judgment and complexity.
Our integrated platform solutions include instruments, consumables and software for analyzing biological systems at a resolution and scale that matches the complexity of biology. We have launched multiple products that enable researchers to understand and interrogate biological analytes in their full biological context.
Our integrated solutions include instruments, consumables and software for analyzing biological systems at resolution and scale that matches the complexity of biology. We have launched multiple products that enable researchers to understand and interrogate biological analytes in their full biological context.
Our actual results could differ materially from those anticipated in these forward-looking statements as a result of various factors, including those set forth in the section titled “Risk Factors” under Part I, Item 1A above. Overview We are a life science technology company focused on building innovative products to interrogate, understand and master biology.
Our actual results could differ materially from those anticipated in these forward-looking statements as a result of various factors, including those set forth in the section titled “Risk Factors” under Part I, Item 1A above. Overview We are a life sciences technology company focused on building innovative products and solutions to interrogate, understand and master biology.
Accrued contingent liabilities In 2021 and 2020, accrued contingent liabilities were comprised of the original charge, estimated royalties and interest charges primarily related to our litigation with Bio-Rad Laboratories, Inc. We did not incur any accrued contingent liabilities in 2022.
Accrued contingent liabilities In 2021, accrued contingent liabilities were comprised of the original charge, estimated royalties and interest charges primarily related to our litigation with Bio-Rad Laboratories, Inc. We did not incur any accrued contingent liabilities in 2023 and 2022.
Research and development expense primarily consists of personnel and related costs, independent contractor costs, laboratory supplies, equipment maintenance prototype and materials expenses, amortization of developed technology and intangibles and allocated costs including facilities and information technology. We plan to continue to invest in our research and development efforts, including hiring additional employees, to enhance existing products and develop new products.
Research and development expense primarily consists of personnel and related costs, independent contractor costs, laboratory supplies, equipment maintenance prototype and materials expenses, amortization of developed technology and intangibles and allocated costs including facilities and information technology. We plan to continue to invest in our research and development efforts to enhance existing products and develop new products.
Our ability to successfully address the factors below is subject to various risks and uncertainties, including those described under the heading “ Risk Factors .” Instrument sales Management focuses on instrument sales as an indicator of current business success and a leading indicator of likely future sales of consumables.
Our ability to successfully address the factors below is subject to various risks and uncertainties, including those described under the heading “ Risk Factors .” 79 Table of Contents Instrument sales Management focuses on instrument sales as an indicator of current business success and a leading indicator of likely future sales of consumables.
Revenue is recognized net of any sales incentive, distributor rebates and commissions and any taxes collected from customers. Instrument service agreements are typically entered into for a one-year term, with the coverage period beginning after the expiration of the standard one-year warranty period. Revenue from the sale of instrument service agreements are recognized ratably over the coverage period.
Revenue is recognized net of any sales incentive, distributor rebates and commissions and any taxes collected from customers. Instrument service agreements are typically entered into for a one-year term, with the coverage period beginning after the expiration of the standard one-year warranty period.
Inventory Inventory is recorded at the lower of cost, determined on a first-in, first-out basis, or net realizable value. We use judgment to analyze and determine if the composition of our inventory is obsolete, slow-moving or unsalable and frequently review such determinations.
Inventory Inventory is recorded at the lower of cost, determined on a first-in, first-out basis, or net realizable value. We use judgment to analyze and determine if the composition of our inventory is obsolete, slow-moving, unsalable or otherwise carried above the net realizable value and frequently review such determinations.
Results of Operations In this section, we discuss the results of our operations for the year ended December 31, 2022 compared to the year ended December 31, 2021.
Results of Operations In this section, we discuss the results of our operations for the year ended December 31, 2023 compared to the year ended December 31, 2022.
The revenue contribution from these and other consumable products has varied and is expected to vary on a quarterly basis due to several factors, including the publication of scientific papers demonstrating the value of the consumables, the availability of grants to fund research, budgetary timing and our introduction of new product features and new consumables offerings.
The revenue contribution from these and other consumable products has varied and is expected to vary on a quarterly basis due to several factors, including the publication of scientific papers demonstrating the value of the consumables, the availability of grants to fund research, budgetary timing, our introduction of new product features and new consumables offerings and our own manufacturing capacity or the capacity of our partners.
Cost of revenue, gross profit and gross margin Cost of revenue. Cost of revenue primarily consists of manufacturing costs incurred in the production process including personnel and related costs, costs of component materials, manufacturing overhead, packaging and delivery costs and allocated costs including facilities and information technology.
Cost of revenue primarily consists of manufacturing costs incurred in the production process including personnel and related costs, costs of component materials, manufacturing overhead, packaging and delivery costs and allocated costs including facilities and information technology.
Under Sections 382 and 383 of the Internal Revenue Code of 1986, as amended (the “Code”), if a corporation undergoes an “ownership change,” the corporation’s ability to use its pre-change net operating loss carryforwards and other pre-change attributes, such as research tax credits, to offset its post-change income may be limited.
Under Sections 382 and 383 of the Internal Revenue Code of 1986, as amended (the “Code”), if a corporation undergoes an “ownership change,” the corporation’s ability to use its pre-change NOL carryforwards and other pre-change attributes, such as tax credits, to offset its post-change income may be limited.
The increase was primarily due to interest income generated from our cash equivalents and marketable securities during the year ended December 31, 2022 and an increase in interest rates.
The increase was primarily due to interest income generated from our cash equivalents and marketable securities during the year ended December 31, 2023 reflecting an increase in interest rates.
We have experienced a history of losses and a lack of future taxable income would adversely affect our ability to utilize these NOLs and research and development credit carryforwards. We currently maintain a full valuation allowance against these tax assets.
We have experienced a history of losses and a lack of future taxable income would adversely affect our ability to utilize these NOL and tax credit carryforwards. We currently maintain a full valuation allowance against these tax assets.
Our revenue is subject to fluctuation based on the foreign currency in which our products are sold, principally for sales denominated in the euro. Our revenue from consumables includes sales of our Chromium, Visium and Xenium consumable products. Our consumables are designed to work exclusively with our instruments.
Our revenue is subject to fluctuation based on the foreign currency in which our products are sold, principally for sales denominated in the euro, Great British pound and Japanese yen. Our revenue from consumables includes sales of our Chromium, Visium and Xenium consumable products. Our consumables are designed to work exclusively with our instruments.
During the year ended December 31, 2022, we issued market-based performance stock awards ("PSAs") comprising of performance stock options and performance restricted stock units.
During the years ended December 31, 2023 and 2022, we issued market-based performance stock awards ("PSAs") comprising of performance stock options and performance restricted stock units.
We write down specifically identified unusable, obsolete, slow-moving or known unsalable inventory in the period that it is first recognized by using a number of factors including product expiration dates, open and unfulfilled orders and sales forecasts.
We write down specifically identified unusable, obsolete, slow-moving or known unsalable inventory and inventory otherwise carried above the net realizable value in the period that it is first recognized by using a number of factors including product expiration dates, open and unfulfilled orders and sales forecasts.
Revenue contribution from our Single Cell Gene Expression and Single Cell ATAC consumables decreased as a percentage of overall consumables revenue while revenue contribution from our Single Cell Immune Profiling, Single Cell Multiome ATAC+Gene Expression solution and Visium consumables increased as a percentage of overall consumables revenue for the year ended December 31, 2022.
Revenue contribution from our Single Cell Gene Expression, Single Cell Multiome ATAC+Gene Expression and Single Cell Immune Profiling consumables decreased as a percentage of overall consumables revenue while revenue contribution from our Single Cell Gene Expression Flex, Single Cell ATAC and Visium and Xenium consumables increased as a percentage of overall consumables revenue for the year ended December 31, 2023.
As of December 31, 2022, we had an accumulated deficit of $1.0 billion and cash and cash equivalents and marketable securities totaling $430.0 million. We expect to continue to incur significant expenses for the foreseeable future and to incur operating losses in the near term.
As of December 31, 2023, we had an accumulated deficit of $1.3 billion and cash and cash equivalents and marketable securities totaling $388.7 million. We expect to continue to incur significant expenses for the foreseeable future and to incur operating losses in the near term.
In addition, certain attributes attributable to ReadCoor are subject to annual limitations as a result of our acquisition of ReadCoor, which constituted an ownership change of ReadCoor. Such limitations may result in expiration of a portion of our net operating loss carryforwards or other tax attributes before utilization.
In addition, certain ReadCoor tax attributes are subject to annual limitations as a result of our acquisition of ReadCoor, which constituted an ownership change of ReadCoor. Such limitations may result in expiration of a portion of our NOL or tax credit carryforwards before utilization.
We completed a study through October 31, 2022 to determine whether an ownership change had occurred under Section 382 or 383 of the Code, and we determined that an ownership change occurred in 2013. As a result, our net operating losses generated through November 1, 2013 may be subject to limitation under Section 382 of the Code.
We completed a study through September 30, 2023 to determine whether an ownership change had occurred under Section 382 or 383 of the Code, and we determined that an ownership change occurred in 2013. As a result, our NOLs generated through November 1, 2013 may be subject to limitation under Section 382 of the Code.
We expect these costs to be recognized only in periods during which we complete an acquisition of assets comprised in whole or part of intellectual property for research and development. We periodically evaluate acquisitions of this nature. Selling, general and administrative.
In-process research and development. In-process research and development consists of costs incurred to acquire intellectual property for research and development. We expect these costs to be recognized, in most cases, only in periods during which we complete an acquisition of assets comprised in whole or part of intellectual property for research and development. We periodically evaluate acquisitions of this nature.
The net cash provided by financing activities of $35.3 million in the year ended December 31, 2021 was primarily from proceeds of $40.3 million from the issuance of common stock from the exercise of stock options and employee stock purchase plan purchases partially offset by payments on financing arrangements of $5.0 million.
Financing activities The net cash provided by financing activities of $13.7 million in the year ended December 31, 2023 was primarily from proceeds of $19.5 million from the issuance of common stock from the exercise of stock options and employee stock purchase plan purchases partially offset by payments on financing arrangements of $5.8 million.
We estimated the value of the PSA awards granted in the year ended December 31, 2022 to be approximately $16.0 million using a Monte Carlo simulation model, using assumptions including volatility, risk-free interest rate, cost of equity and dividends. We will recognize the compensation expense over the derived service period using the accelerated attribution method commencing on the grant date.
We estimated the value of the PSA awards granted using a Monte Carlo simulation model, using assumptions including volatility, risk-free interest rate, cost of equity and dividends. We will recognize the compensation expense over the derived service period using the accelerated attribution method commencing on the grant date.
We define cumulative instruments sold as the cumulative number of Chromium instruments, including the Chromium X Series, the Chromium Connect and the legacy Chromium Controller, Visium CytAssist instruments and Xenium instruments sold since inception. 77 Table of Contents Our quarterly instrument unit volumes can fluctuate due to a number of factors, including the procurement and budgeting cycles of many of our customers, especially government and academic institutions where unused funds may be forfeited or future budgets reduced if purchases are not made by their fiscal year end, and the purchasing patterns of international customers which vary due to procurement or budgeting cycles, holidays or other factors which may result in a disproportionate amount of their purchasing activity occurring in specific periods.
Our quarterly instrument unit volumes can fluctuate due to a number of factors, including the procurement and budgeting cycles of many of our customers, especially government and academic institutions where unused funds may be forfeited or future budgets reduced if purchases are not made by their fiscal year end, and the purchasing patterns of international customers which vary due to procurement or budgeting cycles, holidays or other factors which may result in a disproportionate amount of their purchasing activity occurring in specific periods.
The change in other income (expense), net for the year December 31, 2022 as compared to the year ended December 31, 2021 was driven by realized and unrealized losses from foreign currency rate measurement fluctuations.
Other expense, net increased by $0.1 million for the year ended December 31, 2023 as compared to the year ended December 31, 2022 and was driven by realized and unrealized losses from foreign currency rate measurement fluctuations.
Our ability to use net operating loss carryforwards, research and development credit carryforwards and other tax attributes to reduce future taxable income and liabilities may be further limited as a result of future changes in stock ownership.
Our ability to use NOL or tax credit carryforwards to reduce future taxable income and liabilities may be further limited as a result of future changes in stock ownership.
In addition, we had state tax credit carryforwards of $46.6 million, which carry forward indefinitely. Our ability to utilize such carryforwards for income tax savings is subject to certain conditions and may be subject to certain limitations in the future due to ownership changes. As such, there can be no assurance that we will be able to utilize such carryforwards.
Our ability to utilize such carryforwards for income tax savings is subject to certain conditions and may be subject to certain limitations in the future due to ownership changes. As such, there can be no assurance that we will be able to utilize such carryforwards.
As a result, if we earn net taxable income, our ability to use our pre-change net operating loss carryforwards or other pre-change tax attributes to offset United States federal and state taxable income may still be subject to limitations, which could potentially result in increased future tax liability to us.
As a result, if we generate taxable income, our ability to use our pre-change NOL or tax credit carryforwards to offset U.S. federal and state taxable income may still be subject to limitations, which could potentially result in increased future tax liability.
Selling, general and administrative expenses increased $40.7 million, or 16%, for the year ended December 31, 2022 as compared to the year ended December 31, 2021.
Selling, general and administrative expenses increased $45.0 million, or 15%, for the year ended December 31, 2023 as compared to the year ended December 31, 2022.
The PSAs consist of three separate tranches and the vesting of each tranche is subject to the Class A common stock closing price being maintained at or above the predetermined share price goals of $60, $80 and $105 for each tranche, respectively, for a period of 20 consecutive trading days.
The PSAs consist of three separate tranches and the vesting of each tranche is subject to the Class A common stock closing price being maintained at or above certain 89 Table of Contents predetermined share price goals for each tranche.
However, our liquidity assumptions may prove to be incorrect, and we could exhaust our available financial resources sooner than we currently expect. We intend to continue to evaluate market conditions and may in the future pursue additional sources of funding, such as mortgage or other financing, to further enhance our financial position and to execute our business strategy.
We intend to continue to evaluate market conditions and may in the future pursue additional sources of funding, such as mortgage or other financing, to further enhance our financial position and to execute our business strategy.
We expect our expenses will increase substantially in connection with our ongoing activities, as we: • attract, hire and retain qualified personnel; • scale our technology platforms and introduce new products and services; • protect and defend our intellectual property; • acquire businesses or technologies; and • invest in processes, tools and infrastructure and facilities to support the growth of our business. 76 Table of Contents Operational Effectiveness in the COVID-19 Pandemic Environment We continue to closely monitor developments surrounding the COVID-19 pandemic including, among other developments, the potential impacts of variants.
We expect our expenses will increase in connection with our ongoing activities, as we: • attract, hire and retain qualified personnel; • scale our technology platforms and introduce new products and services; • protect and defend our intellectual property; • acquire businesses or technologies; and • invest in processes, tools and infrastructure to support the growth of our business.
The net cash used in operating activities of $21.4 million for the year ended December 31, 2021 was due primarily to a net loss of $58.2 million, net cash outflow from changes in operating assets and liabilities of $87.4 million, partially offset by stock-based compensation expense of $96.0 million, depreciation and amortization of $21.1 million and amortization of leased right-of-use assets of $7.1 million.
The net cash used in operating activities of $33.6 million for the year ended December 31, 2022 was due primarily to a net loss of $166.0 million, net cash outflow from changes in operating assets and liabilities of $39.4 million, partially offset by stock-based compensation expense of $136.8 million, depreciation and amortization of $25.4 million, amortization of leased right-of-use assets of $7.6 million, loss on disposal of property and equipment of $1.1 million and amortization of premium and accretion of discount on marketable securities, net of $0.9 million.
See Note 4 to the consolidated financial statements for further details of the above acquisitions. Key business metrics We regularly review a number of operating and financial metrics, including cumulative instruments sold and consumable pull-through, to evaluate our business, measure our performance, identify trends affecting our business, formulate financial projections and make strategic decisions.
Key business metrics We regularly review a number of operating and financial metrics, including cumulative instruments sold and total consumables reactions, to evaluate our business, measure our performance, identify trends affecting our business, formulate financial projections and make strategic decisions.
Our Chromium Connect and Xenium instruments require installation and we offer in-person training for their use. We believe cumulative instruments sold, a metric we previously referred to as our instrument installed base, is one of the indicators of our ability to drive customer adoption of our products.
Our Chromium Controller, Chromium X Series and Visium CytAssist instruments are user installable and do not require in-person training. Our Chromium Connect and Xenium instruments require installation and we offer in-person training for their use. We believe cumulative instruments sold is one of the indicators of our ability to drive customer adoption of our products.
For each of the years ended December 31, 2022, 2021 and 2020, our Single Cell Gene Expression consumables, which were introduced in 2016, were our highest selling consumables product. For the year ended December 31, 2022, the remaining consumables revenue was substantially comprised of sales of our Single Cell Immune Profiling consumables, Single Cell Multiome ATAC+Gene Expression solution and Visium.
For each of the years ended December 31, 2023, 2022 and 2021, our Single Cell Gene Expression consumables, which were introduced in 2016, were our highest selling consumables product.
Cash flow summary The following table summarizes our cash flows for the periods indicated: Year Ended December 31, 2022 2021 (in thousands) Net cash (used in) provided by: Operating activities $ (33,606) $ (21,373) Investing activities (350,887) (106,729) Financing activities 15,817 35,297 Effect of exchange rates changes on cash, cash equivalents, and restricted cash (44) 234 Net decrease in cash, cash equivalents, and restricted cash $ (368,720) $ (92,571) 85 Table of Contents Operating activities The net cash used in operating activities of $33.6 million for the year ended December 31, 2022 was due primarily to a net loss of $166.0 million, net cash outflow from changes in operating assets and liabilities of $39.4 million, partially offset by stock-based compensation expense of $136.8 million, depreciation and amortization of $25.4 million, amortization of leased right-of-use assets of $7.6 million, loss on disposal of property and equipment of $1.1 million and amortization of premium and accretion of discount on marketable securities, net of $0.9 million.
Cash flow summary The following table summarizes our cash flows for the periods indicated: Year Ended December 31, 2023 2022 (in thousands) Net cash (used in) provided by: Operating activities $ (15,197) $ (33,606) Investing activities 133,492 (350,887) Financing activities 13,669 15,817 Effect of exchange rates changes on cash, cash equivalents, and restricted cash (33) (44) Net increase (decrease) in cash, cash equivalents, and restricted cash $ 131,931 $ (368,720) 87 Table of Contents Operating activities The net cash used in operating activities of $15.2 million for the year ended December 31, 2023 was due primarily to a net loss of $255.1 million, partially offset by stock-based compensation expense of $167.0 million, depreciation and amortization of $35.5 million, net cash inflow from changes in operating assets and liabilities of $17.3 million, asset impairment charges of $9.8 million, amortization of leased right-of-use assets of $8.1 million, realized losses on sale of marketable securities of $1.7 million and other non-cash expenses of $0.4 million.
Provision for Income Taxes The Company’s provision for income taxes was $4.0 million and $4.5 million, respectively, for the year ended December 31, 2022 as compared to the year ended December 31, 2021. The provision for income taxes for the years ended December 31, 2022 and 2021 consists primarily of foreign taxes.
Provision for Income Taxes The Company’s provision for income taxes was $6.3 million and $4.0 million, respectively, for the year ended December 31, 2023 and 2022. The provision for income taxes increased by $2.3 million for the year ended December 31, 2023 as compared to the year ended December 31, 2022. The increase was primarily due to higher foreign income.
We expect our instrument sales to continue to grow as we increase penetration in our existing markets and expand into, or offer new features and solutions that appeal to, new markets. 78 Table of Contents We plan to grow our instrument sales in the coming years through multiple strategies including expanding our sales efforts globally and continuing to enhance the underlying technology and applications for life sciences research.
We plan to grow our instrument sales in the coming years through multiple strategies including expanding our sales efforts globally and continuing to enhance the underlying technology and applications for life sciences research.
Short-term restricted cash of $2.6 million and long-term restricted cash of $5.0 million primarily serves as collateral for outstanding letters of credit for facilities. We have generated negative cumulative cash flows from operations since inception through the year ended December 31, 2022, and we have generated losses from operations since inception as reflected in our accumulated deficit of $1.0 billion.
We have generated negative cumulative cash flows from operations since inception through the year ended December 31, 2023, and we have generated losses from operations since inception as reflected in our accumulated deficit of $1.3 billion.
Additionally, our 2020 acquisitions of CartaNA and ReadCoor were largely comprised of purchases of intellectual property which were expensed as in-process research and development in the quarter during which such acquisitions occurred.
Our 2023 acquisition of certain intangible and other assets from Centrillion Technologies, Inc. and Centrillion Technology Holdings Corp. and 2020 acquisitions of CartaNA and ReadCoor were largely comprised of purchases of intellectual property which were expensed as in-process research and development in the quarter during which such acquisitions occurred or when certain technology development milestones were met.
Our federal NOLs generated after January 1, 2018, which total $708.5 million, are carried forward indefinitely, while all of our other federal NOLs and tax credit carryforwards expire beginning in 2033. As of December 31, 2022, we had state NOLs of $375.7 million, which expire beginning in 2033.
As of December 31, 2023, we had federal net operating loss (“NOL”) carryforwards of $672.3 million and federal tax credit carryforwards of $77.3 million. Our federal NOLs generated after December 31, 2017, which total $665.9 million, are carried forward indefinitely, while all of our other federal NOL and tax credit carryforwards expire beginning in 2033.
In 2020, we introduced our Chromium Connect instrument, which is an automated version of our legacy Chromium Controller instrument. We believe the automated features of the Chromium Connect will increase our addressable market by increasing utilization by biopharmaceutical customers.
In 2020, we introduced our Chromium Connect instrument, which is an automated version of our legacy Chromium Controller instrument.
The net cash outflow from operating assets and liabilities was partially offset by an increase in accrued compensation and other related benefits of $16.3 million, an increase in accounts payable of $11.1 million due to higher operational spending and timing of vendor payments, a decrease in deferred revenue of $1.5 million and a decrease in other noncurrent assets of $1.0 million.
The net cash inflow from operating assets and liabilities was partially offset by an increase in accounts receivable of $10.6 million primarily due to an increase in revenue and timing of collections, a decrease of $8.7 million due to payment of operating lease liabilities, a decrease in accounts payable of $6.0 million due to timing of vendor payments, a decrease in accrued compensation and other related benefits of $2.6 million and an increase in prepaid expenses and other current assets of $2.4 million.
We currently anticipate making aggregate capital expenditures of between approximately $60 million and $70 million during the next 12 months, the majority of which we expect to incur for construction costs of the facilities on our property in Pleasanton, California in the first half of 2023, as well as other global facilities and equipment to be used for manufacturing and research and development.
We currently anticipate making aggregate capital expenditures of between approximately $20 million and $25 million during the next 12 months, which we expect to include, among other expenditures, equipment to be used for manufacturing and research and development.
We have invested, and will continue to invest, in our manufacturing capabilities and commercial infrastructure. We expect to complete the expansion of our research and development center and manufacturing facility adjacent to our Pleasanton global headquarters in the near future.
We completed the expansion of our research and development center and manufacturing facility adjacent to our Pleasanton global headquarters in 2023.
We take a long-term view in growing and scaling our business and we regularly review acquisition and investment opportunities, and we may in the future enter into arrangements to acquire or invest in businesses, real estate, services and technologies, including intellectual property rights, and any such acquisitions or investments could significantly increase our capital needs.
Our future capital requirements will depend on many factors including our revenue growth rate, research and development efforts, investments in or acquisitions of complementary or enhancing technologies or businesses, the timing and extent of additional capital expenditures to invest in existing and new facilities, the expansion of sales and marketing and international activities, legal costs associated with defending and enforcing intellectual property rights and the introduction of new products. 86 Table of Contents We take a long-term view in growing and scaling our business and we regularly review acquisition and investment opportunities, and we may in the future enter into arrangements to acquire or invest in businesses, real estate, services and technologies, including intellectual property rights, and any such acquisitions or investments could significantly increase our capital needs.
As we expand the scale and scope of our international business activities, any changes in the United States and foreign taxation of such activities may increase our overall provision for income taxes in the future. As of December 31, 2022, we had federal net operating loss carryforwards (“NOLs”) of $717.0 million and federal tax credit carryforwards of $59.0 million.
Provision for income taxes Our provision for income taxes consists primarily of foreign taxes. As we expand the scale and scope of our international business activities, any changes in the U.S. and foreign taxation of such activities may increase our overall provision for income taxes in the future.
The increase was primarily driven by increased personnel expenses of $50.3 million, including $21.6 million in stock-based compensation expense and $2.5 million in restructuring expense, $3.1 million of higher costs for facilities and information technology to support operational expansion, partially offset by decreased outside legal expenses of $7.7 million, $3.8 million of consulting and professional services and $2.5 million of lower marketing expenses related to conferences and seminars.
The increase was primarily driven by increases in outside legal expenses of $18.1 million, personnel expenses of $14.4 million, including $14.7 million in stock-based compensation expense, $6.4 million for facilities and information technology including lease impairment charges of $2.8 million, $4.5 million of impairment charges relating to the discontinuance of a product line, and higher consulting and professional services of $1.8 million.
We expect our operating expenditures to continue to increase in 2023 and beyond as we increase our investment to support new and existing research and development projects and incentivize and retain key talent, which we expect to result in increased stock-based compensation expense in future periods.
Excluding acquisitions, we expect our operating expenditures to continue to increase in 2024 and beyond as we increase our investment in new and existing research and development projects, commercial efforts to support revenue growth and incentives to retain key talent.
We expect to incur additional selling, general and administrative expenses due to continued investment in our sales, marketing and customer service efforts to support the anticipated growth of our business. We also expect increased infrastructure costs, as well as increased costs for accounting, human resources, legal including litigation-related fees and contingency payments, insurance and investor relations.
We expect to incur additional selling, general and administrative expenses due to continued investment in our sales, marketing and customer service efforts to support the anticipated growth of our business and increased legal costs to support the protection of our intellectual property portfolio. We expect infrastructure costs including allocated facilities and information technology costs to remain flat in absolute dollars.
In 2022 and 2021, we introduced five and four new consumables products for each of these years, respectively. We intend to continue to make focused investments to increase revenue and scale operations to support the growth of our business and therefore expect expenses in this area to increase.
We intend to continue to make focused investments to increase revenue and scale operations to support the growth of our business and therefore expect expenses in this area to increase. We have invested, and will continue to invest, in our manufacturing capabilities and commercial infrastructure.
As a result of these and other initiatives, we expect research and development expense will increase in absolute dollars in future periods and vary from period to period as a percentage of revenue. In-process research and development. In-process research and development consists of costs incurred to acquire intellectual property for research and development.
As a result of these and other initiatives, we expect research and development expense will increase in absolute dollars in future periods and vary from period to period as a percentage of revenue. Having completed the expansion of our global headquarters in Pleasanton in 2023, we expect allocated facilities and information technology costs to remain relatively flat in 2024.
While we expect to continue to incur operating losses for the foreseeable future due to the investments we intend to make, we believe that our existing cash and cash equivalents and cash generated from sales of our products will be sufficient to meet our anticipated cash needs for at least the next 12 months.
We believe that our existing cash and cash equivalents and cash generated from sales of our products will be sufficient to meet our anticipated cash needs for at least the next 12 months. However, our liquidity assumptions may prove to be incorrect, and we could exhaust our available financial resources sooner than we currently expect.
Our margins are generally higher for those instruments and consumables that we sell directly to customers as compared to those that we sell through distributors. While we expect the mix of direct sales as compared to sales through distributors to remain relatively constant in the near term, we are currently evaluating increasing our direct sales capabilities in certain geographies.
Our margins are generally higher for those instruments and consumables that we sell directly to customers as compared to those that we sell through distributors.
The increase was primarily driven by an increase in personnel expenses of $34.8 million, including $17.2 million in stock-based compensation expense and $1.4 million in restructuring expense, higher costs of laboratory materials and supplies of $4.6 million used to support our research and development efforts, $11.2 million of higher costs for facilities and information technology to support operational expansion, higher consulting and professional services of $1.1 million for product development and $0.9 million of higher depreciation.
The increase was primarily driven by an increase in personnel expenses of $15.0 million, including $13.6 million in stock-based compensation expense and higher costs for facilities and information technology of $4.6 million including a lease impairment charge of $2.1 million.
Interest income Interest income consists of interest earned on our cash and cash equivalents which are invested in bank deposit, in money market funds and from our investments in marketable securities.
Interest income Interest income consists of interest earned on our cash and cash equivalents which are invested in bank deposits, money market funds and marketable securities. 82 Table of Contents Other income (expense), net Other income (expense), net primarily consists of realized and unrealized gains and losses related to foreign exchange rate remeasurements.
Overall, we expect our gross margin will trend lower in the near-term due in part to change in product mix with newly introduced products and the impacts of inflation and increased supply chain costs. 79 Table of Contents Continued investment in growth Our significant revenue growth has been driven by rapid innovation towards novel solutions that command price premiums and quick adoption of our solutions by our customer base.
Continued investment in growth Our significant revenue growth has been driven by rapid innovation towards novel solutions that command price premiums and quick adoption of our solutions by our customer base.
We believe that these metrics are representative of our current business; however, we anticipate these may change or may be substituted for additional or different metrics as our business grows and as we introduce new products.
We believe that these metrics are representative of our current business; however, we anticipate these may change or may be substituted for additional or different metrics as our business grows and as we introduce new products. 78 Table of Contents Cumulative instruments sold As of December 31, 2023 2022 2021 Chromium 5,180 4,411 3,511 Visium 531 211 — Xenium 255 8 — Cumulative instruments sold 5,966 4,630 3,511 Our products are sold to academic and translational researchers and biopharmaceutical companies.
Instrument revenue increased $7.9 million, or 12%, to $72.4 million for the year ended December 31, 2022 as compared to the year ended December 31, 2021, primarily due to higher volume of instruments sold including our newly introduced Visium CytAssist and Xenium instruments.
Instruments revenue increased $51.1 million, or 71%, to $123.5 million for the year ended December 31, 2023 as compared to the year ended December 31, 2022, primarily due to higher volume of Spatial instruments sold. The revenues for the years ended December 31, 2023 and 2022 included twelve and three months of sales of Xenium instruments, respectively.
Cost of revenue, Gross Profit and Gross Margin Year Ended December 31, Change (dollars in thousands) 2022 2021 $ % Cost of revenue $ 120,386 $ 74,091 $ 46,295 62 % Gross profit $ 396,023 $ 416,399 $ (20,376) (5) % Gross margin 77 % 85 % Cost of revenue increased $46.3 million, or 62%, for the year ended December 31, 2022 as compared to the year ended December 31, 2021.
Consumables revenue increased $44.0 million, or 10%, to $479.6 million for the year ended December 31, 2023 as compared to the year ended December 31, 2022, primarily driven by growth in both Chromium and Spatial consumables sales. 84 Table of Contents Cost of revenue, Gross Profit and Gross Margin Year Ended December 31, Change (dollars in thousands) 2023 2022 $ % Cost of revenue $ 209,414 $ 120,386 $ 89,028 74 % Gross profit $ 409,313 $ 396,023 $ 13,290 3 % Gross margin 66 % 77 % Cost of revenue increased $89.0 million, or 74%, for the year ended December 31, 2023 as compared to the year ended December 31, 2022.
Operating Expenses Year Ended December 31, Change (dollars in thousands) 2022 2021 $ % Research and development $ 265,667 $ 211,752 $ 53,915 25 % Selling, general and administrative 298,300 257,560 40,740 16 % Accrued contingent liabilities — (660) 660 (100) % Total operating expenses $ 563,967 $ 468,652 $ 95,315 20 % Research and development expense increased $53.9 million, or 25%, for the year ended December 31, 2022 as compared to the year ended December 31, 2021.
Operating Expenses Year Ended December 31, Change (dollars in thousands) 2023 2022 $ % Research and development $ 270,332 $ 265,667 $ 4,665 2 % In-process research and development 60,980 — 60,980 N/A Selling, general and administrative 343,330 298,300 45,030 15 % Total operating expenses $ 674,642 $ 563,967 $ 110,675 20 % Research and development expense increased $4.7 million, or 2%, for the year ended December 31, 2023 as compared to the year ended December 31, 2022.
In September 2020, we completed a public offering of our Class A common stock for aggregate proceeds of $482.3 million, net of offering costs, underwriting discounts and commissions. Since our inception in 2012, we have incurred net losses in each year. Our net losses were $166.0 million and $58.2 million for the years ended December 31, 2022 and 2021, respectively.
In addition to instrument and consumable sales, we derive revenue from post-warranty service contracts for our instruments. Since our inception in 2012, we have incurred net losses in each year. Our net losses were $255.1 million and $166.0 million for the years ended December 31, 2023 and 2022, respectively.
The net cash outflow from operating assets and liabilities was primarily due to a decrease in accrued contingent liabilities of $44.2 million, of which $29.4 million was paid as cash settlement arising from the Bio-Rad Agreement, an increase in accounts receivable of $34.0 million due to an increase in sales, an increase in inventory of $30.1 million due to build of inventory to meet anticipated demand, a decrease in other noncurrent liabilities of $4.7 million, an increase in prepaid expenses and other current assets of $1.1 million, a decrease of $2.5 million in payment of operating lease expenses and a decrease in accrued expenses and other current liabilities of $0.9 million due to the timing of payments including license fees.
The net cash inflow from operating assets and liabilities was primarily due to an increase in accrued expenses and other current liabilities of $28.3 million primarily driven by $20.0 million of accrued purchase consideration, an increase in deferred revenue of $10.9 million, a decrease in inventory of $7.9 million and an increase in other noncurrent liabilities of $1.3 million.
Other Income (Expense), Net Year Ended December 31, Change (dollars in thousands) 2022 2021 $ % Interest income $ 6,647 $ 206 $ 6,441 3,127 % Interest expense (476) (866) 390 (45) % Other (expense) income, net (198) (802) 604 (75) % Total other income (expense) $ 5,973 $ (1,462) $ 7,435 (509) % Interest income increased by $6.4 million for the year ended December 31, 2022 as compared to the year ended December 31, 2021.
In addition, we expect increased legal costs in 2024 to support the protection of our intellectual property portfolio. 85 Table of Contents Other Income (Expense), Net Year Ended December 31, Change (dollars in thousands) 2023 2022 $ % Interest income $ 16,906 $ 6,647 $ 10,259 154 % Interest expense (33) (476) 443 (93) % Other expense, net (307) (198) (109) 55 % Total other income (expense) $ 16,566 $ 5,973 $ 10,593 177 % Interest income increased by $10.3 million for the year ended December 31, 2023 as compared to the year ended December 31, 2022.
Deferred tax assets related to our domestic operations are fully offset by a valuation allowance. 84 Table of Contents Liquidity and Capital Resources As of December 31, 2022, we had approximately $430.0 million in cash and cash equivalents, and marketable securities which were primarily held in U.S. banks.
Furthermore, the Company expects to pay cash consideration tied to future sales milestones if such milestones are met. See Note 4 to the consolidated financial statements for further details. Liquidity and Capital Resources As of December 31, 2023, we had approximately $388.7 million in cash and cash equivalents, and marketable securities which were primarily held in U.S. banks.
(the "Bio-Rad Agreement") during the year ended December 31, 2021, $19.7 million from higher manufacturing costs due to increased sales and higher costs of newly introduced products, $5.1 million of higher inventory scrap and excess and obsolete inventory charges, $3.7 million of higher warranty costs and $3.1 million of higher royalty expenses.
The increase was primarily driven by higher manufacturing costs of $79.0 million due to increased sales and higher costs of newly introduced products, $4.4 million of higher inventory write-downs and $4.4 million of higher warranty charges.