Biggest changeSee “Risk Factors” in Part II, Item 1A of this report for additional risks we face due to the COVID-19 pandemic. Results of Operations Below are factors we want to highlight for understanding our 2022 annual results and year over year comparison with proper historical perspective: ● 2022 represented a year of broad semiconductor supply chain challenges driven by factors including the COVID-19 pandemic and international trade conflicts, which significantly impacted our results. ● Our relationships with our foundry partners and assembly and test partners contributed significantly to our ability to secure more capacity and support the growth of product revenue in 2022 compared to 2021. ● Our manufacturing efficiency and yields improved throughout 2022 resulting in significantly higher product margins compared to 2021. 32 Table of Contents The following table sets forth our results of operations for the periods indicated: Year Ended December 31, December 31, December 31, 2022 2021 2022 2021 (In thousands) (As a percentage of revenue) Product sales $ 55,032 $ 43,931 92 % 80 % Licensing, royalty, patent, and other revenue 4,953 11,215 8 20 Total revenue 59,985 55,146 100 100 Cost of product sales 25,112 21,045 42 38 Cost of licensing, royalty, patent, and other revenue 928 1,029 2 2 Total cost of sales 26,040 22,074 43 40 Gross profit 33,945 33,072 57 60 Operating expenses: Research and development 11,108 12,628 19 23 General and administrative 11,741 10,949 20 20 Sales and marketing 4,869 4,460 8 8 Total operating expenses 27,718 28,037 47 51 Income from operations 6,227 5,035 10 9 Interest expense (274) (547) — (1) Other income (expense), net 190 (141) — — Net income before income taxes 6,143 4,347 10 8 Income tax expense (14) (4) — — Net income and comprehensive income $ 6,129 $ 4,343 10 % 8 % Comparison of the Years Ended December 31, 2022 and 2021 Revenue We generated 85% and 66% of our revenue from products sold through distributors for the years ended December 31, 2022 and 2021, respectively.
Biggest changeThe following table sets forth our results of operations for the periods indicated: Year Ended December 31, 2023 2022 2023 2022 (In thousands) (As a percentage of revenue) Product sales $ 53,123 $ 55,032 83 % 92 % Licensing, royalty, patent, and other revenue 10,642 4,953 17 8 Total revenue 63,765 59,985 100 100 Cost of product sales 24,693 25,112 39 42 Cost of licensing, royalty, patent, and other revenue 1,827 928 3 2 Total cost of sales 26,520 26,040 42 43 Gross profit 37,245 33,945 58 57 Operating expenses: Research and development 11,776 11,108 19 19 General and administrative 14,296 11,741 22 20 Sales and marketing 5,288 4,869 8 8 Total operating expenses 31,360 27,718 49 47 Income from operations 5,885 6,227 9 10 Interest expense (63) (274) — — Other income, net 3,214 190 5 — Net income before income taxes 9,036 6,143 14 10 Income tax benefit (expense) 16 (14) — — Net income and comprehensive income $ 9,052 $ 6,129 14 % 10 % Comparison of the Years Ended December 31, 2023 and 2022 Revenue We generated 78% and 85% of our revenue from products sold through distributors for the years ended December 31, 2023 and 2022, respectively.
To continue to grow our revenue, we must continue to achieve design wins for our MRAM products. We consider a design win to occur when an OEM or contract manufacturer notifies us that it has qualified one of our products as a component in a product or system for production.
Design wins . To continue to grow our revenue, we must continue to achieve design wins for our MRAM products. We consider a design win to occur when an OEM or contract manufacturer notifies us that it has qualified one of our products as a component in a product or system for production.
The 2019 Term Loan matures on June 1, 2023. In conjunction with entering into the 2019 Credit Facility, on August 5, 2019, we and SVB amended and restated the warrant issued to SVB in connection with the first amendment to the 2017 Credit Facility, which was a warrant to purchase 9,375 shares of our common stock at an exercise price of $8.91 per share, to add an option by SVB to put the warrant back to us for $50,000 upon expiration or a liquidity event, to be prorated if SVB exercises a portion of the warrant.
The 2019 Term Loan was to mature on June 1, 2023. In conjunction with entering into the 2019 Credit Facility, on August 5, 2019, we and SVB amended and restated the warrant issued to SVB in connection with the first amendment to the 2017 Credit Facility, which was a warrant to purchase 9,375 shares of our common stock at an exercise price of $8.91 per share, to add an option by SVB to put the warrant back to us for $50,000 upon expiration or a liquidity event, to be prorated if SVB exercises a portion of the warrant.
GAAP. The preparation of these financial statements requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements, as well as the reported revenue generated and expenses incurred during the reporting periods.
The preparation of these financial statements requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements, as well as the reported revenue generated and expenses incurred during the reporting periods.
We are required to comply with certain covenants under the 2019 Credit Facility, including requirements to maintain a minimum cash balance and availability under the Line of Credit, and restrictions on certain actions without the consent of the lender, such as limitations on our ability to engage in mergers or acquisitions, sell assets, incur indebtedness, or grant liens or negative pledges on our assets, make loans or make other investments.
We were required to comply with certain covenants under the 2019 Credit Facility, including requirements to maintain a minimum cash balance and availability under the Line of Credit, and restrictions on certain actions without the consent of the lender, such as limitations on our ability to engage in mergers or acquisitions, sell assets, incur indebtedness, or grant liens or negative pledges on our assets, make loans or make other investments.
The 2019 Credit Facility contains a material adverse effect clause which provides that an event of default will occur if, among other triggers, an event occurs that could reasonably be expected to result in a material adverse effect on our business, operations, or condition, or on our ability to perform our obligations under the 2019 Term Loan.
The 2019 Credit Facility contained a material adverse effect clause which provides that an event of default will occur if, among other triggers, an event occurs that could reasonably be expected to result in a material adverse effect on our business, operations, or condition, or on our ability to perform our obligations under the 2019 Term Loan.
The additional payment, which is accounted for as a debt discount, is being accreted using the effective interest method. The 2019 Term Loan has a prepayment fee equal to 2% of the total commitment, which is due only if the 2019 Term Loan is prepaid prior to the scheduled maturity date for any reason.
The additional payment, which is accounted for as a debt discount, was being accreted using the effective interest method. The 2019 Term Loan had a prepayment fee equal to 2% of the total commitment, which was due only if the 2019 Term Loan was prepaid prior to the scheduled maturity date for any reason.
The Line of Credit also provides for a termination fee equal to 1% of the maximum availability under the Line of Credit, which is due in case of a termination of the Line of Credit prior to the scheduled maturity date, and an unused facility fee equal to 0.125% per annum of the average unused portion of the Line of Credit, which is expensed as incurred.
The Line of Credit also provided for a termination fee equal to 1% of the maximum availability under the Line of Credit, which was due in case of a termination of the Line of Credit prior to the scheduled maturity date, and an unused facility fee equal to 0.125% per annum of the average unused portion of the Line of Credit, which is expensed as incurred.
From time to time, we may provide distributors with price adjustments subsequent to the delivery of product to them and such amounts are dependent on the end customer and product sales price. Price adjustments can be based on a 38 Table of Contents variety of factors, including customer, product, quantity, geography, and competitive differentiation.
From time to time, we may provide distributors with price adjustments subsequent to the delivery of product to them and such amounts are dependent on the end customer and product sales price. Price adjustments can be based on a variety of factors, including customer, product, quantity, geography, and competitive differentiation.
We maintain a direct selling relationship, for strategic purposes, with several key customer accounts. We have organized our sales team and representatives into three primary regions: Asia-Pacific (APAC); North America; and Europe, Middle East and Africa (EMEA).
We maintain a direct selling relationship, for strategic purposes, with several key customer accounts. We have organized our sales team and representatives into three primary regions: Asia-Pacific (APAC); North America; and 31 Table of Contents Europe, Middle East and Africa (EMEA).
Cash Flows From Financing Activities During the year ended December 31, 2022, cash used in financing activities was $1.5 million, which primarily consisted of $2.4 million in payments on long-term debt offset by $0.9 million in proceeds from stock option exercises and purchases of shares under our employee stock purchase plan. 36 Table of Contents During the year ended December 31, 2021, cash used in financing activities was $1.5 million, which primarily consisted of $3.4 million in payments on long-term debt offset by $1.9 million in proceeds from stock option exercises and purchases of shares under our employee stock purchase plan.
During the year ended December 31, 2022, cash used in financing activities was $1.5 million, which primarily consisted of $2.4 million in payments on long-term debt offset by $0.9 million in proceeds from stock option exercises and purchases of shares under our employee stock purchase plan.
There were no patent sales during the year ended December 31, 2022.
There were no patent sales during the year ended December 31, 2023.
The amended Line of Credit allows for a maximum draw of $5.0 million, subject to a formula borrowing base, has a two-year term and bears interest at a floating rate equal to the Wall Street Journal (WSJ) prime rate plus 1.5%, per annum, subject to a floor of 4.75%. As of December 31, 2022, the interest rate was 9.00%.
The amended Line of Credit allowed for a maximum draw of $5.0 million, subject to a formula borrowing base, has a two-year term and bears interest at a floating rate equal to the Wall Street Journal (WSJ) prime rate plus 1.5%, per annum, subject to a floor of 4.75%.
Sales and marketing expenses increased by $0.4 million, or 9.2%, from $4.5 million during the year ended December 31, 2021, to $4.9 million during the year ended December 31, 2022. The increase was primarily due to an increase in variable compensation costs.
Sales and marketing expenses increased by $0.4 million, or 8.6%, from $4.9 million during the year ended December 31, 2022, to $5.3 million during the year ended December 31, 2023. The increase was primarily due to an increase in variable compensation costs and contract labor.
The warrant expires on July 6, 2023. The warrant is classified as a liability and recorded at fair value within other liabilities in our balance sheet. Due to the put right, the warrant is subject to fair value remeasurement at each subsequent reporting date until the exercise or expiration of the warrant.
The warrants were set to expire on July 6, 2023. The warrant was classified as a liability and recorded at fair 35 Table of Contents value within other liabilities in our balance sheet. Due to the put right, the warrant was subject to fair value remeasurement at each subsequent reporting date until the exercise or expiration of the warrant.
During the year ended December 31, 2021, cash provided by operating activities was $9.4 million, which primarily consisted of net income of $4.3 million, adjusted by non-cash charges of $5.0 million and a change of $4,000 in our net operating assets and liabilities.
During the year ended December 31, 2022, cash provided by operating activities was $9.5 million, which primarily consisted of net income of $6.1 million, adjusted by non-cash charges of $5.3 million and a decrease of $1.9 million in our net operating assets and liabilities.
Personnel-related expenses, including salaries, benefits, bonuses, and stock-based compensation, are among the most significant component of each of our operating expense categories. 34 Table of Contents Year Ended December 31, Change 2022 2021 Amount % (Dollars in thousands) Research and development $ 11,108 $ 12,628 $ (1,520) (12.0) % Research and development as a % of revenue 19 % 23 % Research and Development Expenses.
Personnel-related expenses, including salaries, benefits, bonuses, and stock-based compensation, are among the most significant component of each of our operating expense categories. Year Ended December 31, Change 2023 2022 Amount % (Dollars in thousands) Research and development $ 11,776 $ 11,108 $ 668 6.0 % Research and development as a % of revenue 19 % 19 % Research and Development Expenses.
As of December 31, 2022, the interest rate was 6.75%. A final payment of 7% of the original principal amount of the 2019 Term Loan must be made when the 2019 Term Loan is prepaid or repaid, whether at maturity or as a result of a prepayment or acceleration or otherwise.
A final payment of 7% of the original principal amount of the 2019 Term Loan was to be made when the 2019 Term Loan is prepaid or repaid, whether at maturity or as a result of a prepayment or acceleration or otherwise.
Cash Flows The following table summarizes our cash flows for the periods indicated (in thousands): Year Ended December 31, 2022 2021 (In thousands) Cash provided by operating activities $ 9,493 $ 9,359 Cash used in investing activities (2,586) (1,030) Cash used in financing activities (1,521) (1,519) Cash Flows From Operating Activities During the year ended December 31, 2022, cash provided by operating activities was $9.5 million, which primarily consisted of net income of $6.1 million, adjusted by non-cash charges of $5.3 million and a decrease of $1.9 million in our net operating assets and liabilities.
Cash Flows The following table summarizes our cash flows for the periods indicated (in thousands): Year Ended December 31, 2023 2022 (In thousands) Cash provided by operating activities $ 13,128 $ 9,493 Cash used in investing activities (1,385) (2,586) Cash used in financing activities (1,592) (1,521) Cash Flows From Operating Activities During the year ended December 31, 2023, cash provided by operating activities was $13.1 million, which consisted of net income of $9.1 million, non-cash charges of $6.4 million and changes in net operating assets and liabilities of $2.3 million.
Research and development expenses decreased by $1.5 million, or 12.0%, from $12.6 million during the year ended December 31, 2021, to $11.1 million during the year ended December 31, 2022.
Research and development expenses increased by $0.7 million, or 6.0%, from $11.1 million during the year ended December 31, 2022, to $11.8 million during the year ended December 31, 2023.
We also entered into a contractual agreement with a customer during the year ended December 31, 2021 for the development of a RAD-Hard product, consisting of a technology license, a design license agreement and development contract and a separate contractual agreement with a customer during the year ended December 31, 2022 for the development of a strategic radiation hardened field programmable gate array product, consisting of a technology license to provide design and development services under the contractual agreement.
We also have entered into multiple contractual agreements with customers for the development of a RAD-Hard product, consisting of a technology license, a design license agreement and development contract and for the development of a strategic radiation hardened field programmable gate array product, consisting of a technology license to provide design and development services under the contractual agreements.
General and administrative expenses increased by $0.8 million, or 7.2%, from $10.9 million during the year ended December 31, 2021, to $11.7 million during the year ended December 31, 2022.
General and administrative expenses increased by $2.6 million, or 21.8%, from $11.7 million during the year ended December 31, 2022, to $14.3 million during the year ended December 31, 2023.
We recognize sales of products in discrete unit form at a point in time, revenue related to licensing agreements when we have delivered control of the technology, revenue related to royalty agreements in the period in which sales generated from products sold using our technology occurs, sales of backend foundry services over time, and design services to third parties either at a point in time or over time, depending on the nature of the services.
We recognize sales of products in discrete unit form at a point in time, revenue related to licensing agreements when we have delivered control of the technology, revenue related to royalty agreements in the period in which sales generated from products sold using our technology occurs, sales of backend foundry services over time, and design services to third parties either at a point in time or over time, depending on the nature of the services. 36 Table of Contents Product Revenue For products sold in their discrete form, we either sell our products directly to OEMs, ODMs, contract manufacturers (CMs), or through a network of distributors, who in turn sell to those customers.
Under these covenants, we are prohibited from paying cash dividends with respect to our capital stock. We were in compliance with all covenants at December 31, 2022.
Under these covenants, we were prohibited from paying cash dividends with respect to our capital stock.
Interest Expense Year Ended December 31, Change 2022 2021 Amount % (Dollars in thousands) Interest expense $ 274 $ 547 $ (273) (49.9) % Interest expense decreased by $0.3 million, or 49.9%, from $0.5 million during the year ended December 31, 2021, to $0.3 million during the year ended December 31, 2022.
Interest Expense Year Ended December 31, Change 2023 2022 Amount % (Dollars in thousands) Interest expense $ 63 $ 274 $ (211) (77.0) % Interest expense decreased by $0.2 million, or 77.0%, from $0.3 million during the year ended December 31, 2022, to $0.1 million during the year ended December 31, 2023.
We believe our cash and cash equivalents, coupled with the amount available under our credit facility and our anticipated growth and sales levels are sufficient to meet our anticipated capital requirements in the next 12 months.
We believe our cash and cash equivalents are sufficient to meet our anticipated capital requirements in the next 12 months.
Accordingly, we determined the licenses were not distinct within the context of the contract and combined the license with other performance obligations. As a result, we are recognizing revenue related to the performance obligations over time using the input method based on costs incurred to date relative to the total expected costs of the contract over the performance obligation period. 39 Table of Contents Patents In an effort to monetize on our intellectual property, we may sell patents to customers.
Accordingly, we determined the 37 Table of Contents licenses were not distinct within the context of the contract and combined the license with other performance obligations. As a result, we are recognizing revenue related to the performance obligations over time using the input method based on costs incurred to date relative to the total expected costs of the contract over the performance obligation period. Inventory We record inventories at the lower of cost, determined on a first-in, first-out basis or net realizable value.
Our revenue by region for the periods indicated was as follows (in thousands): Year Ended December 31, 2022 2021 APAC $ 35,631 $ 32,327 North America 14,533 15,813 EMEA 9,821 7,006 Total revenue $ 59,985 $ 55,146 33 Table of Contents Year Ended December 31, Change 2022 2021 Amount % (Dollars in thousands) Product sales $ 55,032 $ 43,931 $ 11,101 25.3 % Licensing, royalty, patent, and other revenue 4,953 11,215 (6,262) (55.8) % Total revenue $ 59,985 $ 55,146 $ 4,839 8.8 % Total revenue increased by $4.9 million, or 8.8%, from $55.1 million during the year ended December 31, 2021, to $60.0 million during the year ended December 31, 2022.
Our revenue by region for the periods indicated was as follows (in thousands): Year Ended December 31, 2023 2022 APAC $ 33,096 $ 35,631 North America 15,922 14,533 EMEA 14,747 9,821 Total revenue $ 63,765 $ 59,985 Year Ended December 31, Change 2023 2022 Amount % (Dollars in thousands) Product sales $ 53,123 $ 55,032 $ (1,909) (3.5) % Licensing, royalty, patent, and other revenue 10,642 4,953 5,689 114.9 % Total revenue $ 63,765 $ 59,985 $ 3,780 6.3 % Total revenue increased by $3.8 million, or 6.3%, from $60.0 million during the year ended December 31, 2022, to $63.8 million during the year ended December 31, 2023.
Cost of Sales and Gross Margin Year Ended December 31, Change 2022 2021 Amount % (Dollars in thousands) Cost of sales $ 25,112 $ 21,045 $ 4,067 19.3 % Cost of licensing, royalty, patent, and other revenue 928 1,029 (101) (9.8) % Total cost of sales $ 26,040 $ 22,074 $ 3,966 18.0 % Gross margin 56.6 % 60.0 % * * Cost of product sales increased by $4.1 million, or 19.3%, from $21.0 million during the year ended December 31, 2021, to $25.1 million during the year ended December 31, 2022.
Cost of Sales and Gross Margin Year Ended December 31, Change 2023 2022 Amount % (Dollars in thousands) Cost of sales $ 24,693 $ 25,112 $ (419) (1.7) % Cost of licensing, royalty, patent, and other revenue 1,827 928 899 96.9 % Total cost of sales $ 26,520 $ 26,040 $ 480 1.8 % Gross margin 58.4 % 56.6 % * * Cost of product sales decreased by $0.4 million, or 1.7%, from $25.1 million during the year ended December 31, 2022, to $24.7 million during the year ended December 31, 2023.
The increase was primarily due to increases in expenses related to profit sharing and professional service fees. Year Ended December 31, Change 2022 2021 Amount % (Dollars in thousands) Sales and marketing $ 4,869 $ 4,460 $ 409 9.2 % Sales and marketing as a % of revenue 8 % 8 % Sales and Marketing Expenses.
The increase was primarily due to increases in professional service costs, share-based compensation, and depreciation. Year Ended December 31, Change 2023 2022 Amount % (Dollars in thousands) Sales and marketing $ 5,288 $ 4,869 $ 419 8.6 % Sales and marketing as a % of revenue 8 % 8 % Sales and Marketing Expenses.
The non-cash charges primarily consisted of stock-based compensation of $3.2 million, depreciation and amortization of $1.5 million, and non-cash interest expense of $0.3 million.
The non-cash charges primarily consisted of stock-based compensation of $5.0 million, depreciation and amortization of $1.2 million, and a loss on prepayment and termination of our 2019 credit facility of $0.2 million.
The increase was due to an increase in product sales and price increases from suppliers, partially offset by increased yields on toggle products. Cost of licensing, royalty, patent, and other revenue decreased by $0.1 million, or 9.8%, from $1.0 million during the year ended December 31, 2021, to $0.9 million during the year ended December 31, 2022.
The decrease was primarily due to a reduction in product sales compared to the prior year. Cost of licensing, royalty, patent, and other revenue increased by $0.9 million, or 96.9%, from $0.9 million during the year ended December 31, 2022, to $1.8 million during the year ended December 31, 2023.
The following table presents a reconciliation of net income, the most directly comparable GAAP measure, to Adjusted EBITDA for the periods indicated: Year Ended December 31, 2022 2021 Adjusted EBITDA reconciliation: Net income $ 6,129 $ 4,343 Depreciation and amortization 982 1,455 Stock-based compensation expense 4,408 3,227 Interest expense 274 547 Income tax expense 14 4 Adjusted EBITDA $ 11,807 $ 9,576 Design wins .
The following table presents a reconciliation of net income, the most directly comparable GAAP measure, to Adjusted EBITDA for the periods indicated: Year Ended December 31, 2023 2022 Adjusted EBITDA reconciliation: Net income $ 9,052 $ 6,129 Depreciation and amortization 1,205 982 Stock-based compensation expense 5,005 4,408 Interest expense 63 274 Income tax (benefit) expense (16) 14 Adjusted EBITDA $ 15,309 $ 11,807 Our Adjusted EBITDA for the year ended December 31, 2023 includes a one-time employee retention tax credit received of $2.0 million in the second quarter of 2023.
New design wins in each successive quarter of 2022 were 61, 49, 48, and 52, respectively, compared to 40, 37, 40, and 64 in each successive quarter of 2021, respectively. Effect of the COVID-19 Pandemic on our Business The COVID-19 outbreak has resulted in government authorities around the world implementing numerous measures to try to reduce the spread of COVID-19, such as travel bans and restrictions, quarantines, “shelter-in-place,” “stay-at-home,” total lock-down orders, business limitations or shutdowns and similar orders.
New design wins in each successive quarter of 2023 were 66, 62, 37, and 52, respectively, compared to 61, 49, 48, and 52 in each successive quarter of 2022, respectively. Effect of COVID-19 on our Business The COVID-19 outbreak resulted in government authorities around the world implementing numerous measures to try to reduce the spread of COVID-19.
Any resulting change in the fair value of the warrant will be recorded as other (expense) income, net in our statements of income and comprehensive income.
Any resulting change in the fair value of the warrant was to be recorded as other income, net, in our statements of income and comprehensive income. The other income recognized for the years ended 2023 and 2022 related to the change in fair value of the warrant has been minimal and immaterial to the financial statements.
As of December 31, 2022, we do not believe that it is probable that the clause will be triggered within the next 12 months. The amortization of the debt issuance costs and accretion of the debt discount is included in interest expense within the statement of income and comprehensive income and included in non-cash interest expense within the statements of cash flows. For additional information about the 2019 Credit Facility, see Note 6 in the accompanying Notes to Financial Statements in Part II, Item 8 of this Form 10-K. Critical Accounting Policies and Significant Judgements and Estimates Our financial statements have been prepared in accordance with U.S.
For additional information about the 2019 Credit Facility, see Note 6 in the accompanying Notes to Financial Statements in Part II, Item 8 of this Form 10-K. Critical Accounting Policies and Significant Judgements and Estimates Our financial statements have been prepared in accordance with U.S. GAAP.
These actions may include further altering our operations in order to protect the best interests of our employees, customers and suppliers, and to comply with government requirements, while also planning and executing our business to best support our customers, suppliers, and partners. The ultimate extent of the impact of the COVID-19 pandemic on our business, results of operations and financial condition will depend on future developments, which are highly uncertain, continuously evolving and cannot be predicted, including, but not limited to, the duration and spread of the COVID-19 outbreak, its severity, the emergence and severity of its variants, the actions to contain the virus or treat its impact, such as the availability and efficacy of vaccines (particularly with respect to emerging strains of the virus) and potential hesitancy to use them, general economic factors, such as increased inflation, supply chain restraints, labor supply issues, and how quickly and to what extent normal economic and operating conditions can resume.
These actions may include further altering our operations in order to protect the best interests of our employees, customers and suppliers, and to comply with government requirements, while also planning and executing our business to best support our customers, suppliers, and partners. The ultimate extent of the impact of COVID-19 on our business, results of operations and financial condition will depend on future developments, which are highly uncertain, continuously evolving and cannot be predicted.
The amended 2019 Term Loan has a term of 46 months, and a 16-month interest-only period followed by 30 months of equal principal payments of $200,000 per month, plus accrued interest. The 2019 Term Loan bears interest at a floating rate equal to the WSJ prime rate minus 0.75%, subject to a floor of 3.75%.
The Line of Credit was set to mature on August 5, 2023. The amended 2019 Term Loan provided for a $6.0 million term loan. The amended 2019 Term Loan had a term of 46 months, and a 16-month interest-only period followed by 30 months of equal principal payments of $200,000 per month, plus accrued interest.
The decrease was primarily due to higher expenses in 2021 relating to the development of our 28 nm product that started production in 2022. Year Ended December 31, Change 2022 2021 Amount % (Dollars in thousands) General and administrative $ 11,741 $ 10,949 $ 792 7.2 % General and administrative as a % of revenue 20 % 20 % General and Administrative Expenses.
The increase was primarily due to higher expenses relating to the development and enhancement of our new xSPI family of STT-MRAM products and increases in share-based compensation. Year Ended December 31, Change 2023 2022 Amount % (Dollars in thousands) General and administrative $ 14,296 $ 11,741 $ 2,555 21.8 % General and administrative as a % of revenue 22 % 20 % General and Administrative Expenses.
Since our business is dependent on a global supply chain, we expect to continue to navigate the impact of COVID-19, particularly in some Asian countries. We will continue to monitor the situation and take additional actions as warranted.
Overall, our business remained operational in the midst of COVID-19. The United States Government has declared that it was no longer treating COVID-19 as a pandemic. Since our business is 30 Table of Contents dependent on a global supply chain, we expect to continue to navigate the impact of COVID-19, particularly in some Asian countries.
The change in our net operating assets and liabilities was primarily due to an increase of $1.7 million of accrued liabilities and an increase in deferred revenue of $0.8 million related to timing of RAD-Hard licensing revenue recognition.
The change in our net operating assets and liabilities was primarily due to an increase in accounts receivable of $0.9 million due to timing of cash receipts for outstanding balances, an increase in inventory of $1.7 million to meet anticipated production volumes, an increase in prepaid and other current assets of $0.4 million, an increase in other assets of $0.2 million, an increase in accounts payable of $0.5 million, an increase in accrued liabilities of $0.8 million, and a decrease in deferred revenue of $0.5 million.
Cash Flows From Investing Activities Cash used in investing activities during the years ended December 31, 2022 and 2021 was $2.6 million and $1.0 million, respectively, which consisted of capital expenditures primarily for the purchase of manufacturing equipment and purchased software.
During the year ended December 31, 2022, cash used in investing activities was $2.6 million, which consisted of capital expenditures primarily for the purchase of manufacturing equipment and purchased software offset by a nominal amount in proceeds received on the sale of property and equipment. Cash Flows From Financing Activities During the year ended December 31, 2023, cash used in financing activities was $1.6 million, which primarily consisted of $2.8 million of payments to pay off our 2019 Credit Facility offset by $1.2 million in proceeds from stock option exercises and purchases of shares under our employee stock purchase plan.
Licensing, royalty, patent, and other revenue is a highly variable revenue item characterized by a small number of transactions annually with revenue based on size and terms of each transaction. Licensing, royalty, patent, and other revenue decreased by $6.3 million, from $11.2 million during the year ended December 31, 2021 to $5.0 million during the year ended December 31, 2022.
Licensing, royalty, patent, and other revenue is a highly variable revenue item characterized by a small number of transactions annually with revenue based on size and terms of each transaction. We estimate royalty revenue earned throughout the year, with an annual adjustment recognized for actual sales in the first quarter of each fiscal year.
Other Income (Expense), Net Year Ended December 31, Change 2022 2021 Amount % (Dollars in thousands) Other income (expense), net $ 190 $ (141) $ 331 (234.8) % Other income (expense), net changed by $0.3 million, or 234.8%, from $0.1 million of expense during the year ended December 31, 2021 to $0.2 million of income during the year ended December 31, 2022.
The decrease was due to having no outstanding balance under our 2019 Credit Facility as we paid off the outstanding balance in full in March 2023, resulting in no interest incurred during the remainder of 2023 after the outstanding balance was paid in full. 33 Table of Contents Other Income, Net Year Ended December 31, Change 2023 2022 Amount % (Dollars in thousands) Other income, net $ 3,214 $ 190 $ 3,024 1,591.6 % Other income, net changed by $3.0 million, from $0.2 million of expense during the year ended December 31, 2022, to $3.2 million of income during the year ended December 31, 2023.
These were offset by an increase of $0.6 million in accounts payable due to timing of invoice due dates and a $0.2 million increase in lease liabilities.
These were offset by an increase of $0.6 million in accounts payable due to timing of invoice due dates and a $0.2 million increase in lease liabilities. 34 Table of Contents Cash Flows From Investing Activities During the year ended December 31, 2023, cash used in investing activities was $1.4 million, which consisted of capital expenditures primarily for the purchase of manufacturing equipment offset by a nominal amount in proceeds received on the sale of property and equipment.
The decrease was due primarily to a decline in licensing costs. Our gross margin decreased from 60.0% during the year ended December 31, 2021, to 56.6% during the year ended December 31, 2022. Our gross margin decreased due to price increases from suppliers and lower licensing, royalty, patent, and other revenue.
Licensing, royalty, patent, and other revenue increased by $5.7 million, from $5.0 million during the year ended December 31, 2022, to $10.6 million during the year ended December 31, 2023.
Operating Expenses Our operating expenses consist of research and development, general and administrative and sales and marketing expenses.
Our gross margin increased by offsetting increased pricing from suppliers with increased yields on our toggle products and increased licensing revenue to offset the decrease in product sales. Operating Expenses Our operating expenses consist of research and development, general and administrative and sales and marketing expenses.
As of December 31, 2022, the effective interest rate under the 2019 Term Loan was 6.94% and the outstanding balance was $1.6 million.
In March 2023, the 2019 Credit Facility, consisting of our Term Loan and Line of Credit, was paid in full, and there was no outstanding balance as of December 31, 2023.