Biggest changeThe changes in operating assets and liabilities consisted primarily of a $11.2 million increase in accounts receivable due to higher sales in the last month of the quarter, along with $8.0 million increase in prepaid assets due to prepayments made to suppliers to procure inventory and $2.7 million decrease in accounts payable due to timing of purchases and payments, offset by $2.5 million increase in accrued liabilities, and a $1.9 million increase in accrued employee compensation related to higher bonus due to increased headcount and salaries.
Biggest changeThe changes in operating assets and liabilities consisted primarily of a $32.0 million decrease in accounts receivable due to lower revenues, along with $12.5 million increase in accrued liabilities, mostly related to the increase in customer reserves and liability associated with the loss on supplier commitment, $6.7 million increase in other assets and liabilities, mostly driven by an increase in deferred revenues and $5.3 million decrease in prepaid expenses due to lower prepayments made to suppliers to procure inventory offset by a $26.4 million increase in inventories, mostly due to lower enterprise revenues due to high channel inventories, $13.6 million decrease in accounts payable due to timing of purchases and payments, and $2.2 million decrease in accrued employee compensation mostly due to lower accruals for our corporate bonus and sales incentive programs as a result of failure to meet metrics underlying our incentive compensation payable to employees.
For the year ended December 31, 2022, the Company’s effective tax rate of (12.1)% differed from the U.S. statutory rate of 21.0% primarily due to research and development tax credits of $2.8 million, a benefit on Foreign Derived Intangible Income of $2.3 million, and a tax benefit of $0.9 million on revaluation of the UK deferred tax assets at 47 a higher tax rate.
For the year ended December 31, 2022, the Company’s effective tax rate of (12.1)% differed from the U.S. statutory rate of 21.0% primarily due to research and development tax credits of $2.8 million, a benefit on Foreign Derived Intangible Income of $2.3 million, and a tax benefit of $0.9 million on revaluation of the UK deferred tax assets at a higher tax rate.
As of December 31, 2022, the Company had $45.0 million available under the revolving commitments, with no amounts drawn thereunder. In accordance with the terms of the BofA Credit Agreement, commencing with the quarter ended March 31, 2022, we began paying quarterly principal payments of approximately $0.7 million on our term loan.
As of December 31, 2023, the Company had $45.0 million available under the revolving commitments, with no amounts drawn thereunder. In accordance with the terms of the BofA Credit Agreement, commencing with the quarter ended March 31, 2022, we began paying quarterly principal payments of approximately $0.7 million on our term loan.
We believe that cash generated from operations, together with existing sources of liquidity, will satisfy the cash requirements for these contractual obligations. 49 Critical accounting policies and estimates Our consolidated financial statements are prepared in accordance with U.S. GAAP.
We believe that cash generated from operations, together with existing sources of liquidity, will satisfy the cash requirements for these contractual obligations. Critical accounting policies and estimates Our consolidated financial statements are prepared in accordance with U.S. GAAP.
For certain of our software projects under development, we capitalize the development cost during the period between determining technological feasibility of the product and commercial release. We amortize the capitalized development cost upon commercial release, generally over three years and is included in cost of revenues.
For certain of our software projects under development, we capitalize the development cost during the period between determining technological feasibility of the product and commercial release. We amortize the 47 capitalized development cost upon commercial release, generally over three years and is included in cost of revenues.
Our product lines fall into three broad, interrelated categories: Fixed Wireless Broadband (FWB), Enterprise networking, and Subscription and Services. The FWB portfolio spans point-to-point (PTP) and point-to-multi-point (PMP) architectures over multiple standards, including IEEE 802.11 and 3GPP (Third Generation Partnership Program) and frequency bands, including licensed, unlicensed, and lightly licensed spectrum.
Our product lines fall into three broad, interrelated categories: Fixed Wireless & fiber Broadband (FWB), Enterprise networking, and Subscription and Services. The FWB portfolio spans point-to-point (PTP) and point-to-multi-point (PMP) architectures over multiple standards, including IEEE 802.11 and 3GPP (Third Generation Partnership Program) and frequency bands, including licensed, unlicensed, and lightly licensed spectrum, and fiber products.
We outsource our manufacturing to third-party manufacturers located primarily in Mexico, China, Israel and Taiwan. Cost of revenues also includes costs associated with supply operations, including personnel related and allocated overhead costs, provision for excess and obsolete inventory, third-party license costs and third-party costs related to services we provide.
We outsource our manufacturing to third-party manufacturers located primarily in Mexico, Vietnam, Israel and Taiwan. Cost of revenues also includes costs associated with supply operations, including personnel related and allocated overhead costs, provision for excess and obsolete inventory, third-party license costs and third-party costs related to services we provide.
The impact of reverse globalization, including a more nationalistic trend globally leading to increasing government requirements for domestically produced products or limiting the sourcing of components and other products from China and elsewhere, has led us to limit our reliance on third party manufacturers in China and move manufacturing to other locations, which could cause disruptions in our supply operations.
The impact of reverse globalization, including a more nationalistic trend globally leading to increasing government requirements for domestically produced products or limiting the sourcing of components and other products from China and elsewhere, has led us to limit our reliance on third-party manufacturers in China and have moved manufacturing to other locations, which could cause disruptions in our supply operations.
The discussion and analysis of 2020 and changes in the financial condition and results of operations for the year-to-year comparisons between 2020 and 2021 that are not included in this Form 10-K may be found in "Management's Discussion and Analysis of Financial Condition and Results of Operation" in Part II, Item 7 of our Annual report on Form 10-K for the year ended December 31, 2021 filed with the Securities and Exchange Commission ("SEC") on February 24, 2022, which is incorporated by reference to this Part II, Item 7 of this Annual Report on Form 10-K.
The discussion and analysis of 2022 and changes in the financial condition and results of operations for the year-to-year comparisons between 2022 and 2021 that are not included in this Form 10-K may be found in "Management's Discussion and Analysis of Financial Condition and Results of Operation" in Part II, Item 7 of our Annual report on Form 10-K for the year ended December 31, 2022 filed with the Securities and Exchange Commission (SEC) on February 27, 2023, which is incorporated by reference to this Part II, Item 7 of this Annual Report on Form 10-K.
For a detailed discussion on our operating leases, refer to Note 15, Leases, in Notes to Consolidated Financial Statements in Item 8 of part II of this Annual Report on Form 10-K.
For a detailed discussion on our operating leases, refer to Note 14, Leases, in Notes to Consolidated Financial Statements in Item 8 of part II of this Annual Report on Form 10-K.
Overview Cambium Networks is a global technology company that designs, develops, and manufactures wireless broadband and Wi-Fi networking infrastructure solutions for a wide range of applications, including broadband access, wireless backhaul, Industrial Internet of Things (IIoT), public safety communications and Wi-Fi access. Our products are used by businesses, governments, and service providers to build, expand and upgrade broadband networks.
Overview Cambium Networks is a global technology company that designs, develops, and manufactures wireless and fiber broadband and enterprise networking infrastructure solutions for a wide range of applications, including broadband access, wireless backhaul, IoT, public safety communications, and Wi-Fi access. Our products are used by businesses, governments, and service providers to build, expand and upgrade broadband networks.
It provides a single, centralized view of all network devices, including both FWB and Enterprise, as well as real-time performance and usage data, and allows users to make changes to the network configuration and settings.
It provides a single, centralized view of all network devices, including wired and wireless broadband and Enterprise, as well as real-time performance and usage data, and allows users to make changes to the network configuration and settings.
Advanced services offered in conjunction with this platform include application visibility and control which is used to optimize end user experiences; integrated security gateway and SD-WAN for small and medium business; and automated and intelligent network optimization.
Advanced services offered in conjunction with this platform include application visibility and control, which is used to optimize end-user experiences; integrated security gateway and software defined wide area network (SD-WAN) for small and medium businesses; and automated and intelligent network optimization.
In addition, we separate depreciation and amortization in their own category. Research and development In addition to personnel-related costs, research and development expense consists of costs associated with design and development of our products, product certification, travel, recruiting and shared facility and shared IT costs. We generally recognize research and development expense as incurred.
Research and development In addition to personnel-related costs, research and development expense consists of costs associated with design and development of our products, product certification, travel, recruiting and shared facility and shared IT costs. We generally recognize research and development expense as incurred.
As a percentage of revenues, research and development expenses increased from 15.3% in 2021 to 16.8% in 2022.
As a percentage of revenues, research and development expenses increased from 16.8% in 2022 to 24.3% in 2023.
Under the JOBS Act, emerging growth companies can delay adopting new or revised accounting standards issued subsequent to the enactment of the JOBS Act until such time as those standards apply to private companies.
JOBS Act accounting election We are an emerging growth company, as defined in the JOBS Act. Under the JOBS Act, emerging growth companies can delay adopting new or revised accounting standards issued subsequent to the enactment of the JOBS Act until such time as those standards apply to private companies.
We generally recognize product revenues at the time of shipment, provided that all other revenue recognition criteria have been met. Revenues are recognized net of estimated stock returns, volume-based rebates and cooperative marketing allowances that we provide to distributors. Estimated stock returns, volume-based rebates and cooperative marketing allowances are based on historical experience together with any known future business trends.
We generally recognize product revenues at the time of shipment, provided that all other revenue recognition criteria have been met. Revenues are recognized net of estimated stock returns, volume-based rebates, cooperative marketing allowances, and other incentives that we provide to distributors.
Income taxes We account for income taxes under the asset and liability method, which requires the recognition of deferred tax assets and liabilities for the expected future tax consequences of events that have been included in our consolidated financial statements.
We regularly evaluate our exposure for inventory write-downs, and the adequacy of our liability for purchase commitments. 55 Income taxes We account for income taxes under the asset and liability method, which requires the recognition of deferred tax assets and liabilities for the expected future tax consequences of events that have been included in our consolidated financial statements.
The latter capability, delivered through subscription to cnMaestro X, forms the foundation of our ONE Network, a cloud-based network management architecture that allows users to remotely configure, monitor, and manage their wireless network.
The Subscription and Services portfolio includes network planning and design as well as cloud or on-premises network management and control solutions. The latter capability, delivered through subscription to cnMaestro X, forms the foundation of our ONE Network, a cloud-based network management architecture that allows users to remotely configure, monitor, and manage their wireless network.
The effective tax rates for the years ended December 31, 2021 and 2022 were (17.3)% and (12.1)%, respectively.
The effective tax rates for the years ended December 31, 2022 and 2023 were (12.1)% and (21.6)%, respectively.
General and administrative General and administrative expense decreased $0.1 million, or 0.3%, from $25.1 million in 2021 to $25.0 million in 2022. As a percentage of revenues, general and administrative expense increased from 7.5% in 2021 to 8.4% in 2022.
General and administrative General and administrative expense increased $2.4 million, or 9.7%, from $25.0 million in 2022 to $27.4 million in 2023. As a percentage of revenues, general and administrative expense increased from 8.4% in 2022 to 12.5% in 2023.
See Note 12 - Income taxes in the Notes to the Consolidated Financial Statements for more information related to income taxes. Liquidity and Capital Resources As of December 31, 2022, we had a cash balance of $48.2 million. Our financial condition and liquidity remain strong.
See Note 11 - Income taxes in the Notes to the Consolidated Financial Statements for more information related to income taxes. Liquidity and Capital Resources As of December 31, 2023, we had a cash balance of $18.7 million.
Net cash provided by financing activities of $1.2 million for 2022 was primarily due to $2.2 million in proceeds received from the exercise of share options and $2.0 million in proceeds received from the issuance of ordinary shares under our employee share purchase program offset by $2.0 million repayment of principal due under the term loan facility and $1.0 million for taxes paid from shares withheld in net settlement of taxes due on vesting of restricted shares issued to our employees.
Cash flows from financing activities Net cash provided by financing activities of $1.2 million for 2022 was primarily due to $2.2 million in proceeds received from the exercise of share options and $2.0 million in proceeds received from the issuance of ordinary shares under our employee share purchase program offset by $2.0 million repayment of principal due under the term loan facility and $1.0 million for taxes paid from shares withheld in net settlement of taxes due on vesting of restricted shares issued to our employees. 53 Net cash used in financing activities of $1.3 million for 2023 was primarily due to principal payments of $2.6 million on our term loan and $0.7 million of taxes paid on net share settlement of equity awards and a $0.1 million payment of debt issuance costs incurred with our entry into the Amended Credit Agreement.
The transaction price recognized excludes an estimate for the consideration related to products we expect to be returned or amounts we expect to refund. 50 Inventory and inventory valuation Inventories are stated at the lower of cost or net realizable value.
The transaction price recognized excludes an estimate for the consideration related to products we expect to be returned or amounts we expect to refund. Inventory and inventory valuation Inventories are stated at the lower of cost or net realizable value. In determining the cost of raw materials, consumables and goods purchased for resale, the weighted average purchase price is used.
Sales and marketing In addition to personnel costs for sales, marketing, service and product line management personnel, sales and marketing expense consists of our training programs, trade shows, marketing programs, promotional materials, demonstration equipment, national and local regulatory approval on our products, travel and entertainment, recruiting and shared facility and shared IT costs. 43 General and administrative In addition to personnel costs, general and administrative expense consists of professional fees, such as legal, audit, accounting, information technology and consulting costs, insurance, shared facility and shared IT costs, and other supporting overhead costs.
Sales and marketing In addition to personnel costs for sales, marketing, service and product line management personnel, sales and marketing expense consists of our training programs, trade shows, marketing programs, promotional materials, demonstration equipment, national and local regulatory approval on our products, travel and entertainment, recruiting and shared facility and shared IT costs.
The determination of excess or obsolete inventory is estimated based on a comparison of the quantity and cost of inventory on hand to our forecast of customer demand and in consideration of historical usage and management judgment. The assumptions used to derive this estimate did not change significantly in the current period.
The determination of excess or obsolete inventory is estimated based on a comparison of the quantity and cost of inventory on hand to our forecast of customer demand, and in consideration of historical usage and requires significant management judgment.
Sales and marketing Sales and marketing expense increased $2.6 million, or 6.3%, from $41.8 million in 2021 to $44.5 million in 2022. As a percentage of revenues, sales and marketing expense increased from 12.5% in 2021 to 15.0% in 2022.
Sales and marketing Sales and marketing expense decreased $1.9 million, or 4.2%, from $44.5 million in 2022 to $42.6 million in 2023. As a percentage of revenues, sales and marketing expense increased from 15.0% in 2022 to 19.3% in 2023.
We record an additional income tax expense in the period in which new information becomes available indicating the tax liability is greater than our original estimate. Share-based compensation We recognize all share-based compensation expense as a cost in the consolidated financial statements.
We record an additional income tax expense in the period in which new information becomes available indicating the tax liability is greater than our original estimate.
Cash Flows The following table sets forth summarized cash flow data for the periods indicated (in thousands): Years Ended December 31, 2021 2022 Cash provided by (used in) operating activities $ 29,960 $ (3,054 ) Cash used in investing activities $ (10,166 ) $ (9,245 ) Cash (used in) provided by financing activities $ (22,953 ) $ 1,245 Cash flows from operating activities Net cash provided by operating activities for 2021 of $30.0 million consisted primarily of net income of $37.4 million, adjustments for depreciation and amortization of $8.1 million, share-based compensation expense of $7.7 million, and an increase in deferred income taxes of $6.1 million along with changes in operating assets and liabilities that resulted in net cash outflows of $17.0 million.
Cash Flows The following table sets forth summarized cash flow data for the periods indicated (in thousands): Years Ended December 31, 2022 2023 Cash used in operating activities $ (3,054 ) $ (16,952 ) Cash used in investing activities $ (9,245 ) $ (11,225 ) Cash provided by (used in) financing activities $ 1,245 $ (1,269 ) Cash flows from operating activities Net cash used in operating activities for 2022 of $3.1 million consisted primarily of net income of $20.2 million, adjustments for depreciation and amortization of $7.9 million, share-based compensation expense of $10.7 million and increase in provision for inventory excess and obsolescence of $3.7 million offset by a $5.2 million increase in deferred income taxes along with changes in operating assets and liabilities that resulted in net cash outflows of $40.3 million.
Results of operations The following table presents the consolidated statements of operations, as well as the percentage relationship to total revenues for items included in our consolidated statements of operations for the year ended December 31, 2021 compared to the year ended December 31, 2022: Years ended December 31, (in thousands) 2021 2022 Statements of Operations Data: Revenues $ 335,854 $ 296,899 Cost of revenues 175,058 151,759 Gross profit 160,796 145,140 Operating expenses Research and development 51,322 49,865 Sales and marketing 41,819 44,452 General and administrative 25,065 24,982 Depreciation and amortization 6,171 5,961 Total operating expenses 124,377 125,260 Operating income 36,419 19,880 Interest expense, net 4,269 1,977 Other expense (income), net 244 (114 ) Income before income taxes 31,906 18,017 Benefit for income taxes (5,515 ) (2,183 ) Net income $ 37,421 $ 20,200 Years ended December 31, 2021 2022 Percentage of Revenues: Revenues 100.0 % 100.0 % Cost of revenues 52.1 % 51.1 % Gross margin 47.9 % 48.9 % Operating expenses Research and development 15.3 % 16.8 % Sales and marketing 12.5 % 15.0 % General and administrative 7.5 % 8.4 % Depreciation and amortization 1.8 % 2.0 % Total operating expenses 37.1 % 42.2 % Operating income 10.8 % 6.7 % Interest expense, net 1.3 % 0.7 % Other expense (income), net 0.1 % (0.1 )% Income before income taxes 9.4 % 6.1 % Benefit for income taxes (1.6 )% (0.7 )% Net income 11.0 % 6.8 % 44 The following is the discussion and analysis of changes in the financial condition and results of operations for the year ended December 31, 2021 compared to the year ended December 31, 2022.
Results of operations The following table presents the consolidated statements of operations, as well as the percentage relationship to total revenues for items included in our consolidated statements of operations for the year ended December 31, 2022 compared to the year ended December 31, 2023: Years ended December 31, (in thousands) 2022 2023 Statements of Operations Data: Revenues $ 296,899 $ 220,195 Cost of revenues 151,759 151,364 Gross profit 145,140 68,831 Operating expenses Research and development 49,865 53,478 Sales and marketing 44,452 42,599 General and administrative 24,982 27,398 Depreciation and amortization 5,961 6,210 Total operating expenses 125,260 129,685 Operating income (loss) 19,880 (60,854 ) Interest expense, net 1,977 2,521 Other (income) expense, net (114 ) 271 Income (loss) before income taxes 18,017 (63,646 ) (Benefit) provision for income taxes (2,183 ) 13,774 Net income (loss) $ 20,200 $ (77,420 ) 48 Years ended December 31, 2022 2023 Percentage of Revenues: Revenues 100.0 % 100.0 % Cost of revenues 51.1 % 68.7 % Gross margin 48.9 % 31.3 % Operating expenses Research and development 16.8 % 24.3 % Sales and marketing 15.0 % 19.3 % General and administrative 8.4 % 12.5 % Depreciation and amortization 2.0 % 2.8 % Total operating expenses 42.2 % 58.9 % Operating income (loss) 6.7 % (27.6 )% Interest expense, net 0.7 % 1.1 % Other (income) expense, net (0.1 )% 0.2 % Income (loss) before income taxes 6.1 % (28.9 )% (Benefit) provision for income taxes (0.7 )% 6.2 % Net income (loss) 6.8 % (35.1 )% The following is the discussion and analysis of changes in the financial condition and results of operations for the year ended December 31, 2023 compared to the year ended December 31, 2022.
Cost of revenues and gross margin Years ended December 31, Change (dollars in thousands) 2021 2022 $ % Cost of revenues $ 175,058 $ 151,759 $ (23,299 ) (13.3 )% Gross margin 47.9 % 48.9 % 100 bps Cost of revenues decreased $23.3 million, or 13.3%, from $175.1 million for 2021 to $151.8 million for 2022.
Cost of revenues and gross margin Years ended December 31, Change (dollars in thousands) 2022 2023 $ % Cost of revenues $ 151,759 $ 151,364 $ (395 ) (0.3 )% Gross margin 48.9 % 31.3 % (1760) bps Cost of revenues decreased $0.4 million, or 0.3%, from $151.8 million for 2022 to $151.4 million for 2023.
In determining the cost of raw materials, consumables and goods purchased for resale, the weighted average purchase price is used. For finished goods, cost is computed as production cost including capitalized inbound freight costs. The valuation of inventory requires us to estimate excess or obsolete inventory.
For finished goods, cost is computed as production cost including capitalized inbound freight costs. The valuation of inventory requires us to estimate excess or obsolete inventory.
We continue to monitor the impact of macroeconomic factors, including a potential global recession, inflationary pressures and growing political tensions as a result of the Russia-Ukraine conflict, and political tensions with China and elsewhere.
We continue to monitor the impact of macroeconomic factors, including a potential global recession, inflationary pressures, and growing political tensions as a result of the Russia-Ukraine conflict, the recent rapidly accelerating conflict in Israel and Gaza, and 46 escalating tensions between China and Taiwan, and associated tensions between the U.S. and China.
Net cash used in operating activities for 2022 of $3.1 million consisted primarily of net income of $20.2 million, adjustments for depreciation and amortization of $7.9 million, share-based compensation expense of $10.7 million and increase in provision for inventory excess and obsolescence of $3.7 million offset by a $5.2 million increase in deferred income taxes along with changes in operating assets and liabilities that resulted in net cash outflows of $40.3 million.
Net cash used in operating activities for 2023 of $17.0 million consisted primarily of net loss of $77.4 million, adjustments for depreciation and amortization of $9.4 million, share-based compensation expense of $11.6 million and increase in provision for inventory excess and obsolescence of $16.6 million and a $9.1 million decrease in deferred income taxes along with changes in operating assets and liabilities that resulted in net cash inflows of $14.3 million.
For a detailed discussion of our credit facilities, refer to Note 6, Debt, in Notes to Consolidated Financial Statements in Item 8 of Part II of this Annual Report on Form 10-K. (3) These amounts represents unrecorded open purchase orders at December 31, 2022, primarily for inventory-related purchase orders with suppliers.
For a detailed discussion of our credit facilities, refer to Note 6, Debt, in Notes to Consolidated Financial Statements in Item 8 of Part II of this Annual Report on Form 10-K.
The decrease in depreciation and amortization was mostly driven by the amortization of finite-lived intangibles being fully depreciated in the fourth quarter of 2021 offset by slightly higher depreciation on new assets placed in service.
The slight increase in depreciation and amortization was mostly driven by the increase in depreciation on new assets placed in service offset by a decrease in amortization of finite-lived intangibles and purchased software.
These outflows are partially offset by $29.8 million in proceeds received under our new credit facility, $4.8 million in proceeds from the exercise of share options and $1.8 million in proceeds from the issuance of ordinary shares under our employee share purchase program.
These outflows are partially offset by $1.7 million in proceeds from the issuance of ordinary shares under our employee share purchase program and $0.5 million of proceeds received from the exercise of share options. Debt On November 17, 2021, we established a new credit facility with Bank of America ("BofA Credit Agreement").
As of December 31, 2022, we had $45.0 million available under our revolving commitments, with no amounts drawn thereunder. In accordance with the terms of our credit facility with Bank of America, we began making quarterly principal payments of approximately $0.7 million on our term loan, commencing with the quarter ended March 31, 2022.
As of December 31, 2023, we had $45.0 million available under our revolving credit facility, with no amounts drawn thereunder. For 2022 and 2023, in accordance with the terms of our credit facility with Bank of America, all quarterly principal and interest payments have been made.
We assess our liquidity in terms of our ability to generate adequate cash to fund our operating, investing and financing activities. We believe our existing cash, operating cash flow and revolving credit facilities provide us with the financial flexibility needed to fund normal operating expenses, to meet interest and principal requirements of our outstanding indebtedness, and fund capital expenditures.
Our primary liquidity needs are: (i) to fund normal operating expenses; (ii) to meet interest and principal requirements of our outstanding indebtedness; and (iii) to fund capital expenditures. We believe our existing cash, operating cash flow and revolving credit facilities provide us with the financial flexibility needed to meet these needs over at least the next 12 months.
Interest expense, net Years ended December 31, Change (dollars in thousands) 2021 2022 $ % Interest expense, net $ 4,269 $ 1,977 $ (2,292 ) (53.7 )% Interest expense decreased $2.3 million, or 53.7% from $4.3 million in 2021 to $2.0 million in 2022.
Interest expense, net Years ended December 31, Change (dollars in thousands) 2022 2023 $ % Interest expense, net $ 1,977 $ 2,521 $ 544 27.5 % Interest expense increased $0.5 million, or 27.5% from $2.0 million in 2022 to $2.5 million in 2023.
Basis of presentation Revenues Our revenues are generated primarily from the sale of our products, which consist of hardware with essential embedded software. Our revenues also include amounts for software products, extended warranty on hardware products and subscription services. We generally recognize product revenues at the time of shipment, provided that all other revenue recognition criteria have been met.
Basis of presentation Revenues Our revenues are generated primarily from the sale of hardware products with essential embedded software. Our revenues also include amounts for software products, extended warranty on hardware products and subscription services.
(2) These amounts represent the scheduled principal payments based on their contractual maturities related to our term loan with Bank of America and interest payments based on the interest rate in effect on December 31, 2022 of 6.40%.
(2) These amounts represent the scheduled principal payments based on their contractual maturities related to our term loan with Bank of America and interest payments based on the all-in interest rate in effect on December 31, 2023 of 8.7227% through February 2025 and then reduced to 7.2277% when the applicable rate is reduced from 3.25% to 1.75%.
Operating expenses We classify our operating expense as research and development, sales and marketing, and general and administrative expense. Personnel costs are the primary component of each of these operating expense categories, which consist of personnel costs such as salaries, sales commissions, benefits, and bonuses, as well as share-based compensation expense.
Personnel costs are the primary component of each of these operating expense categories, which consist of personnel costs such as salaries, sales commissions, benefits, and bonuses, as well as share-based compensation expense. Depreciation and amortization of long-lived assets is separately disclosed in the statements of operations.
For the year ended December 31, 2022, our income tax benefit decreased by $3.3 million from the year ended December 31, 2021 primarily due a change in the valuation allowance of $8.8 million as a result of the recognition of a valuation allowance of $0.9 million on California deferred tax assets on research and development during 2022 versus a release of the valuation allowance on UK deferred tax assets in 2021 of $7.9 million and a decrease in tax benefits on share-based compensation of $2.6 million offset by an increase in the benefit on Foreign Derived Intangible Income of $2.3 million, an increase in research and development tax credits in the UK, U.S., and U.S. states of $2.0 million and a tax benefit of $0.9 million on revaluation of the UK deferred tax assets at a higher rate.
For the year ended December 31, 2023, our income tax (benefit) provision changed by $16.0 million from the year ended December 31, 2022 primarily due to a change to our income tax benefit at the U.S. statutory tax rate of $13.4 million in 2023 versus a tax expense of $3.8 million in 2022, a tax expense due to an increase in the valuation allowance of $34.5 million primarily as a result of the recognition of a valuation allowance on the UK loss and a tax benefit of $1.9 million on revaluation of UK deferred tax assets at a higher rate.
We expect to regularly assess market conditions and may raise additional equity or incur additional debt if and when management, along with our board of directors, determines that doing so is in our best interest.
We expect to regularly assess our liquidity needs and market conditions and may raise additional equity or incur additional debt if and when our board of directors, determines that doing so is in our best interest. As of December 31, 2023, we had $25.4 million outstanding principal debt on our term loan, including the current portion of $3.3 million.
Benefit for income taxes Years ended December 31, Change (dollars in thousands) 2021 2022 $ % Benefit for income taxes $ (5,515 ) $ (2,183 ) $ 3,332 (60.4 )% Effective income tax rate (17.3 )% (12.1 )% Our tax benefit decreased from a tax benefit of ($5.5) million in 2021 to a tax benefit of ($2.2) million for 2022.
(Benefit) provision for income taxes Years ended December 31, Change (dollars in thousands) 2022 2023 $ % (Benefit) provision for income taxes $ (2,183 ) $ 13,774 $ 15,957 (731.0 )% Effective income tax rate (12.1 )% (21.6 )% Our tax provision changed from a tax benefit of ($2.2) million in 2022 to a tax provision of $13.8 million for 2023.
Europe, Middle East, Africa revenues decreased mostly due to lower PMP revenues due to lower demand and technology transition to new gigabit technologies within our product portfolio, partially offset by higher Enterprise revenues due to strong demand and new product introductions for Wi-Fi and switching products and higher PTP revenues due to higher demand from defense business.
The decrease in revenues in Europe, Middle East, Africa was driven mostly by decreased enterprise revenues due to high levels of channel inventory and decreased PMP revenues as technology is expected to move to new gigabit technologies within our product portfolio, partially offset by increased PTP revenues due to higher demand from defense business.
The assumptions used to derive these estimates did not change significantly in the current period, nor did the value of each estimate. We recognize revenues on extended warranty on a straight-line basis over the term of the extended warranty. We recognize subscription services revenue ratably over the term in which the services are provided and our performance obligation is satisfied.
Variable consideration estimates are continuously assessed such that is probable that a significant reversal of revenue will not occur. We recognize revenues on extended warranty on a straight-line basis over the term of the extended warranty. We recognize subscription services revenue ratably over the term in which the services are provided and our performance obligation is satisfied.
For the year ended December 31, 2021, the Company’s effective tax rate of (17.3)% differed from the U.S. statutory rate of 21.0% primarily due to a tax benefit on the release of a valuation allowance against our UK deferred tax assets of $7.9 million and a $3.4 million tax benefit arising on employee restricted share vesting and option exercises.
For the year ended December 31, 2023, the Company’s effective tax rate of (21.6)%. The effective tax rate differed from the U.S. statutory rate of 21.0% primarily due to a tax expense on the valuation allowance in 2023 of $35.4 million.
On November 17, 2021, we borrowed the entire $30.0 million term loan, which was used to pay off the term loan with Silicon Valley Bank. As of December 31, 2022, we had $28.0 million outstanding principal debt on our term loan, including the current portion of $3.3 million.
The BofA Credit Agreement allows for total borrowings of $75.0 million, which includes a $30.0 million term loan and a revolving loan of $45.0 million. On November 17, 2021, we borrowed the entire $30.0 million term loan. As of December 31, 2023, we had $25.4 million outstanding principal debt on our term loan, including the current portion of $3.3 million.
Operating expenses Years ended December 31, Change (dollars in thousands) 2021 2022 $ % Research and development $ 51,322 $ 49,865 $ (1,457 ) (2.8 )% Sales and marketing 41,819 44,452 2,633 6.3 % General and administrative 25,065 24,982 (83 ) (0.3 )% Depreciation and amortization 6,171 5,961 (210 ) (3.4 )% Total operating expenses $ 124,377 $ 125,260 $ 883 0.7 % Research and development Research and development expense decreased $1.5 million, or 2.8%, from $51.3 million in 2021 to $49.9 million in 2022.
Gross margin benefited from lower production costs due to decreases in component charges as a result of increased availability of components. 50 Operating expenses Years ended December 31, Change (dollars in thousands) 2022 2023 $ % Research and development $ 49,865 $ 53,478 $ 3,613 7.2 % Sales and marketing 44,452 42,599 (1,853 ) (4.2 )% General and administrative 24,982 27,398 2,416 9.7 % Depreciation and amortization 5,961 6,210 249 4.2 % Total operating expenses $ 125,260 $ 129,685 $ 4,425 3.5 % Research and development Research and development expense increased $3.6 million, or 7.2%, from $49.9 million in 2022 to $53.5 million in 2023.
A summary of our contractual obligations at December 31, 2022 are as follows (in thousands): Payments due by period Less than 1 year 1 to 3 years 3 to 5 years More than 5 years Total Operating lease obligations (1) $ 2,154 $ 1,922 $ 384 $ — $ 4,460 Term credit facility (2) 3,281 24,750 — — 28,031 Term credit facility interest (2) 1,716 3,978 — — 5,694 Purchase obligations (3) 84,978 180 — — 85,158 Total $ 92,129 $ 30,830 $ 384 $ — $ 123,343 (1) These amounts represent the undiscounted non-cancelable remaining lease payments.
A summary of our contractual obligations at December 31, 2023 are as follows (in thousands): Payments due by period Less than 1 year 1 to 3 years 3 to 5 years More than 5 years Total Operating lease obligations (1) $ 1,944 $ 4,614 $ 3,265 $ 6,730 $ 16,553 Term credit facility (2) 3,281 22,125 — — 25,406 Term credit facility interest (2) 2,108 2,801 — — 4,909 Purchase obligations (3) 103,570 90 — — 103,660 Total $ 110,903 $ 29,630 $ 3,265 $ 6,730 $ 150,528 (1) These amounts represent the undiscounted remaining lease payments.
Revenues by product category Years ended December 31, Change (dollars in thousands) 2021 2022 $ % Point-to-Multi-Point $ 204,756 $ 114,941 $ (89,815 ) (43.9 )% Point-to-Point 60,761 67,083 6,322 10.4 % Enterprise 66,933 109,844 42,911 64.1 % Other 3,404 5,031 1,627 47.8 % Total revenues by product category $ 335,854 $ 296,899 $ (38,955 ) (11.6 )% Point-to-Multi-Point Our PMP product line comprised 61% of total revenues for 2021 and 39% of total revenues for 2022.
Revenues by product category Years ended December 31, Change (dollars in thousands) 2022 2023 $ % Point-to-Multi-Point $ 114,941 $ 95,197 $ (19,744 ) (17.2 )% Point-to-Point 67,083 80,765 13,682 20.4 % Enterprise 109,844 39,097 (70,747 ) (64.4 )% Other 5,031 5,136 105 2.1 % Total revenues by product category $ 296,899 $ 220,195 $ (76,704 ) (25.8 )% Point-to-Multi-Point Our PMP product line comprised 39% of total revenues for 2022 and 43% of total revenues for 2023.
We also believe that any extended or renewed economic disruptions or deterioration in the global economy could have a negative impact on demand from our customers in future periods. Accordingly, current results and financial condition discussed herein may not be indicative of future operating results and trends.
Any prolonged economic disruptions, further deterioration in the global economy or outbreaks of international hostilities could have a negative impact on demand from our customers in future periods.
Summary of contractual obligations We lease office space and equipment under operating leases that run through 2026. Additionally, our BofA Credit Agreement matures and becomes due and payable in November 2026.
Additionally, our BofA Credit Agreement matures and becomes due and payable in November 2026.
Other expense (income), net Years ended December 31, Change (dollars in thousands) 2021 2022 $ % Other expense (income), net $ 244 $ (114 ) $ (358 ) (146.7 )% Other expense (income), net changed from expense of $0.3 million in 2021 to income of $0.1 million in 2022. The change is primarily associated with foreign currency fluctuations.
The increase was primarily due to an increase in the interest rate on the term loan partially offset by higher interest received. 51 Other (income) expense, net Years ended December 31, Change (dollars in thousands) 2022 2023 $ % Other (income) expense, net $ (114 ) $ 271 $ 385 (337.7 )% Other (income) expense, net changed from income of $0.1 million in 2022 to expense of $0.3 million in 2023.
Revenues by geography Years ended December 31, Change (dollars in thousands) 2021 2022 $ % North America $ 173,491 $ 133,897 $ (39,594 ) (22.8 )% Europe, Middle East, Africa 93,082 90,883 (2,199 ) (2.4 )% Caribbean and Latin America 40,974 31,223 (9,751 ) (23.8 )% Asia Pacific 28,307 40,896 12,589 44.5 % Total revenues by geography $ 335,854 $ 296,899 $ (38,955 ) (11.6 )% 45 Revenues decreased in 2022 compared to 2021 reflecting lower revenues in North America, Europe, Middle East, Africa and Caribbean and Latin America partially offset by higher revenues in Asia Pacific.
Revenues by geography Years ended December 31, Change (dollars in thousands) 2022 2023 $ % North America $ 133,897 $ 131,943 $ (1,954 ) (1.5 )% Europe, Middle East, Africa 90,883 44,169 (46,714 ) (51.4 )% Caribbean and Latin America 31,223 20,729 (10,494 ) (33.6 )% Asia Pacific 40,896 23,354 (17,542 ) (42.9 )% Total revenues by geography $ 296,899 $ 220,195 $ (76,704 ) (25.8 )% Revenues decreased in 2023 compared to 2022 in all regions, with the largest decrease in Europe, Middle East, Africa.
Research and development expense decreased mainly due to a $4.7 million decrease in corporate bonus expense due to lower financial performance along with $0.3 million higher capitalized software costs due to increase in projects eligible for capitalization and $0.2 million lower engineering project material costs.
These increases were partially offset by $1.8 million higher capitalized software costs due to an increase in projects eligible for capitalization, $0.8 million lower engineering material spend based on timing of projects and $0.7 million decrease in corporate bonus expense as we failed to meet bonus targets.
Any adjustments to the valuation of inventory are included in cost of revenues. Product warranties We provide a standard warranty on our products, with the term depending on the product, and record a liability for the estimated future costs associated with potential warranty claims at the time products are sold.
Any adjustments to the valuation of inventory are included in cost of revenues. We record a liability for firm, noncancelable, and unconditional purchase commitments with contract manufacturers and suppliers for quantities in excess of our future demand forecasts consistent with the valuation of our excess and obsolete inventory.
The decrease in general and administrative expense was primarily due to $2.3 million lower corporate bonus expense due to lower financial performance and $0.3 million lower insurance expense.
The decrease in sales and marketing expense was primarily due to $3.4 million lower variable compensation expense due to lower revenues along with $0.2 million lower homologation and regulatory testing expense and $0.2 million lower trade show and marketing-related spend.
Cash flows from investing activities Our investing activities for both periods presented consisted of capital expenditures for property, equipment and software in support of the growth of our business. 48 Cash flows from financing activities Net cash used in financing activities of $23.0 million for 2021 was primarily due to payment of $55.3 million on our existing term loan, $2.8 million of taxes paid on net share settlement of equity awards and a $1.2 million payment of debt issuance costs incurred with our new credit facility.
Cash flows from investing activities Our investing activities for both periods presented consisted of capital expenditures for property, equipment and software in support of the growth of our business.
Revenues are recognized net of estimated stock returns, volume-based rebates and cooperative marketing allowances that we provide to distributors. We recognize subscription services revenue ratably over the term in which the services are provided and our performance obligation is satisfied.
The largest decrease in revenues was in our enterprise product category driven by lower demand due to high channel inventories and slowing economies along with increased stock rotations and the aforementioned incentives. We recognize subscription services revenue ratably over the term in which the services are provided and our performance obligation is satisfied.
Caribbean and Latin America revenues decreased due to lower PMP revenues due to lower demand and supply and distribution issues during the first half of 2022 along with lower Enterprise revenues partially offset by higher PTP revenues due to increased demand for backhaul products.
The decrease in revenues in North America was driven mostly by decreased enterprise revenues due to lower demand as a result of high levels of inventory in the channels, higher levels of stock rotation and increased discounting, mostly offset by higher PTP revenues as a result of higher demand for defense products.
These decreases were mostly offset by $1.5 million in higher share-based compensation expense due to new grants issued, $1.0 million higher staffing-related expenses due to increased headcount, $0.8 million higher contractor costs due to increases in the number of contractors to support ramping of projects, $0.2 million higher travel-related costs and $0.2 million higher homologation and regulatory testing expense due to increase in new product introductions.
The increase in general and administrative expense was primarily due to $1.0 million of expenses incurred in 2023 as part of the Chief Executive Officer transition, $0.8 million higher share-based compensation expense due to new employee equity grants issued, $0.5 million higher employee-related expense due to increased headcount, $0.4 million higher audit and tax fees, $0.3 million higher software and subscription purchases and $0.2 million higher legal expenses.
The increase in Asia Pacific revenues was driven by higher Enterprise revenues due to improved supply and larger deals along with increased PMP and PTP revenues.
The decrease in revenues in Asia Pacific was driven mostly by decreased enterprise revenues as a result of lower demand due to high levels of inventory in the channels and decreased PMP revenues.