Biggest changeRevenues recorded since the acquisition date through December 31, 2022 were approximately $20.9 million. 2021 Acquisitions • Panviva - On June 24, 2021, the Company entered into an agreement to purchase the shares comprising the entire issued share capital of Panviva Pty Ltd, an Australian proprietary company (“Panviva”), a cloud-based enterprise knowledge management solution. • BlueVenn - On February 28, 2021 the Company entered into an agreement to purchase the shares comprising the entire issued share capital of BlueVenn Group Limited, a company limited by shares organized and existing under the laws of England and Wales (“BlueVenn”), a cloud-based customer data platform. • Second Street - On January 19, 2021, the Company entered into an agreement to purchase the shares comprising the entire issued share capital of Second Street Media, Inc., a Missouri corporation (“Second Street”), an audience engagement platform. 2020 Acquisitions • Localytics - On February 6, 2020, the Company entered into an agreement to purchase the shares comprising the entire issued share capital of Char Software, Inc (dba Localytics), a Delaware corporation (“Localytics”), a provider of mobile app personalization and analytics solutions.
Biggest changeConsistent with our growth strategy, we have completed a total of 31 acquisitions from February 2012 through December 31, 2023. 37 Acquisitions completed during the years ended December 31, 2023, 2022 and 2021 include the following: Acquisitions 2023 Acquisitions • None 2022 Acquisitions • BA Insight - On February 22, 2022, the Company entered into an agreement to purchase the shares comprising the entire issued share capital of BA Insight Inc., (“BA Insight”), a cloud-based enterprise knowledge management solution. • Objectif Lune - On January 7, 2022, the Company entered into an agreement to purchase the shares comprising the entire issued share capital of Objectif Lune Inc., a Quebec proprietary company (“Objectif Lune”), a cloud-based document workflow product. 2021 Acquisitions • Panviva - On June 24, 2021, the Company entered into an agreement to purchase the shares comprising the entire issued share capital of Panviva Pty Ltd, an Australian proprietary company (“Panviva”), a cloud-based enterprise knowledge management solution. • BlueVenn - On February 28, 2021 the Company entered into an agreement to purchase the shares comprising the entire issued share capital of BlueVenn Group Limited, a company limited by shares organized and existing under the laws of England and Wales (“BlueVenn”), a cloud-based customer data platform. • Second Street - On January 19, 2021, the Company entered into an agreement to purchase the shares comprising the entire issued share capital of Second Street Media, Inc., a Missouri corporation (“Second Street”), an audience engagement platform.
In addition, gains/losses on divested assets that meet the definition of a business under ASC 805-10, Business Combination—Overall , are included in Total other expense. Income Taxes Because we have not generated domestic net income in any period to date, we have recorded a full valuation allowance against our domestic net deferred tax assets, exclusive of tax deductible goodwill.
In addition, gains/losses on divested assets that meet the definition of a business under ASC 805-10, Business Combination—Overall , are included in Total other expense. 40 Income Taxes Because we have not generated domestic net income in any period to date, we have recorded a full valuation allowance against our domestic net deferred tax assets, exclusive of tax deductible goodwill.
Total Other Expense Total other expense consists primarily of amortization of debt issuance costs over the term of the related term loan, revaluation of foreign subsidiaries, interest expense on outstanding debt, partially offset by interest income on our interest- 36 bearing cash balances held in money market accounts.
Total Other Expense Total other expense consists primarily of amortization of debt issuance costs over the term of the related term loan, revaluation of foreign subsidiaries, interest expense on outstanding debt, partially offset by interest income on our interest-bearing cash balances held in money market accounts.
Sales and marketing expenses may fluctuate as a percentage of total revenues for a variety of reasons including the timing of such expenses, in any particular quarter or annual period. Research and development .
Sales and marketing expenses may fluctuate as a percentage of total revenues for a variety of reasons including the timing of such expenses, in any particular quarter or annual period. 39 Research and development .
In the event we have subsequent changes in ownership, the availability of net operating losses and research and development credit carryovers could be further limited. 37 Results of Operations Consolidated Statements of Operations Data The following tables set forth our results of operations for the specified periods, as well as our results of operations for the specified periods as a percentage of revenue.
In the event we have subsequent changes in ownership, the availability of net operating losses and research and development credit carryovers could be further limited. 41 Results of Operations Consolidated Statements of Operations Data The following tables set forth our results of operations for the specified periods, as well as our results of operations for the specified periods as a percentage of revenue.
We participate in interest rate swap agreements for the purpose of reducing variability in interest rate payments on the Company’s outstanding term loans. These interest rate swaps fix the Company's interest rate (including the hedge premium) at 5.4% for the term of the Credit Facility (as hereinafter defined in “ —Liquidity and Capital Resources—Credit Facility ”).
We participate in interest rate swap agreements for the purpose of reducing variability in interest rate payments on the Company’s outstanding term loans. These interest rate swaps fix a portion of the Company's interest rate (including the hedge premium) at 5.4% for the term of the Credit Facility (as hereinafter defined in “ Liquidity and Capital Resources—Credit Facility ”).
For each category, other than depreciation and amortization and impairment of goodwill, the largest expense component is primarily personnel related costs, which includes salaries, employee benefit costs, bonuses, commissions, stock-based compensation, and payroll taxes. Operating expenses also include allocated overhead costs for facilities, which are allocated to each department based on relative department headcount.
For each category, other than depreciation and amortization and impairment of goodwill, the largest expense component is primarily personnel-related costs, which includes salaries, employee benefit costs, bonuses, commissions, stock-based compensation, and payroll taxes. Operating expenses also include allocated overhead costs for facilities, which are allocated to each department based on relative department headcount. Operating expenses are generally recognized as incurred.
Goodwill and Other Intangible Assets ” in the notes to our consolidated financial statements for more information regarding our fourth quarter 2022 Goodwill impairment. We will continue to evaluate Goodwill impairment in future periods.
Goodwill and Other Intangible Assets ” in the notes to our consolidated financial statements for more information regarding our first quarter 2023 and our fourth quarter 2022 Goodwill impairment charges. We will continue to evaluate Goodwill impairment in future periods.
We assess Goodwill for impairment annually on October 1st, or more frequently when an event occurs which could cause the Carrying Value of our Company to exceed the estimated fair value of our Company.
We assess Goodwill for impairment annually on October 1st, or more frequently when an event occurs which could cause the Carrying Value of our Company to exceed the estimated fair value of our Company. See “ Note 5.
Operating expenses are generally recognized as incurred. 35 Sales and marketing . Sales and marketing expenses primarily consist of personnel related costs for our sales and marketing staff, including salaries, benefits, deferred commission amortization, bonuses, payroll taxes, stock-based compensation and allocated overhead, as well as costs of promotional events, corporate communications, online marketing, product marketing and other brand-building activities.
Sales and marketing . Sales and marketing expenses primarily consist of personnel-related costs for our sales and marketing staff, including salaries, benefits, deferred commission amortization, bonuses, payroll taxes, stock-based compensation and allocated overhead, as well as costs of promotional events, corporate communications, online marketing, product marketing and other brand-building activities.
We recognize the revenue associated with maintenance ratably over the term of the contract. In limited instances, at the customer’s option, we may host the software purchased by a customer under a perpetual license on systems at our third-party data centers. Perpetual license revenue .
Maintenance agreements include the right to support and unspecified upgrades. We recognize the revenue associated with maintenance ratably over the term of the contract. In limited instances, at the customer’s option, we may host the software purchased by a customer under a perpetual license on systems at our third-party data centers. Perpetual license revenue .
The balance of the tax benefit for the years ended December 31, 2022, 2021 and 2020, outside of tax deductible goodwill and current taxes in separate filing states, is related to foreign income taxes, primarily operations of our subsidiaries in Australia, Canada, Ireland and the United Kingdom, and to the release of valuation allowances associated with acquisitions of domestic entities with deferred tax liabilities.
The balance of the tax benefit for the years ended December 31, 2023, 2022 and 2021, outside of tax deductible goodwill and current taxes in separate filing states, is related to foreign income taxes, primarily operations of our subsidiaries in Canada and Ireland, and to the release of valuation allowances associated with acquisitions of domestic entities with a benefit generated in the UK and Australia fully offset by valuation allowances.
Our support revenue consists of maintenance fees associated with our perpetual licenses and hosting fees paid to us by our customers. Typically, when purchasing a perpetual license, a customer also purchases maintenance for which we charge a fee, priced as a percentage of the perpetual license fee. Maintenance agreements include the right to support and unspecified upgrades.
Our subscription agreements typically have terms of one to three years. 38 Our support revenue consists of maintenance fees associated with our perpetual licenses and hosting fees paid to us by our customers. Typically, when purchasing a perpetual license, a customer also purchases maintenance for which we charge a fee, priced as a percentage of the perpetual license fee.
Year Ended December 31, 2022 2021 2020 (dollars in thousands) Stock-based compensation: Cost of revenue $ 1,984 $ 2,088 $ 1,951 Research and development 2,733 3,085 3,391 Sales and marketing 4,239 5,957 3,450 General and administrative 32,646 42,743 32,900 Total $ 41,602 $ 53,873 $ 41,692 (2) Includes depreciation and amortization of $12.5 million, $11.6 million and $10.2 million in the years ended December 31, 2022, 2021 and 2020, respectively.
Year Ended December 31, 2023 2022 2021 (dollars in thousands) Stock-based compensation: Cost of revenue $ 952 $ 1,984 $ 2,088 Research and development 2,463 2,733 3,085 Sales and marketing 2,059 4,239 5,957 General and administrative 17,400 32,646 42,743 Total $ 22,874 $ 41,602 $ 53,873 (2) Includes depreciation and amortization of $13.4 million, $12.5 million and $11.6 million in the years ended December 31, 2023, 2022 and 2021, respectively.
We recognize the revenue associated with subscription agreements ratably over the term of the agreement as the customer receives and consumes the benefits of the cloud services through the contract period. Our subscription agreements typically have terms of one to three years.
We recognize the revenue associated with subscription agreements ratably over the term of the agreement as the customer receives and consumes the benefits of the cloud services through the contract period.
Year Ended December 31, 2022 2021 2020 Amount Percent of Revenue Amount Percent of Revenue Amount Percent of Revenue Revenue: Subscription and support $ 297,887 94% $ 287,621 95% $ 277,504 95% Perpetual license 6,948 2% 2,150 1% 1,884 1% Total product revenue 304,835 96% 289,771 96% 279,388 96% Professional services 12,468 4% 12,245 4% 12,390 4% Total revenue 317,303 100% 302,016 100% 291,778 100% Cost of revenue: Subscription and support (1)(2) 93,948 30% 92,168 31% 89,880 31% Professional services and other 9,793 3% 7,285 2% 8,566 3% Total cost of revenue 103,741 33% 99,453 33% 98,446 34% Gross profit 213,562 67% 202,563 67% 193,332 66% Operating expenses: Sales and marketing (1) 59,416 19% 55,097 18% 46,077 16% Research and development (1) 46,187 15% 42,693 14% 39,002 13% General and administrative (1) 70,462 22% 76,901 25% 68,072 23% Depreciation and amortization 43,669 14% 41,315 14% 36,919 13% Acquisition-related expenses 21,556 6% 21,234 8% 27,075 9% Impairment of goodwill 12,500 4% — —% — —% Total operating expenses 253,790 80% 237,240 79% 217,145 74% Loss from operations (40,228) (13)% (34,677) (12)% (23,813) (8)% Other Expense: Interest expense, net (29,145) (9)% (31,626) (10)% (31,529) (11)% Other expense, net (781) —% (253) (1)% (111) —% Total other expense (29,926) (9)% (31,879) (11)% (31,640) (11)% Loss before benefit from income taxes (70,154) (22)% (66,556) (23)% (55,453) (19)% Benefit from income taxes 1,741 —% 8,344 4% 4,234 1% Net loss (68,413) (22)% (58,212) (19)% (51,219) (18)% Preferred stock dividends and accretion (1,846) (1)% — —% — —% Net loss attributable to common stockholders (3) $ (70,259) (22)% $ (58,212) (19)% $ (51,219) (18)% Net loss per common share: Loss from continuing operations per common share, basic and diluted (3) $ (2.23) $ (1.92) $ (1.92) Weighted-average common shares outstanding, basic and diluted (3) 31,528,881 30,295,769 26,632,116 38 (1) Includes stock-based compensation.
Year Ended December 31, 2023 2022 2021 Amount Percent of Revenue Amount Percent of Revenue Amount Percent of Revenue Revenue: Subscription and support $ 281,554 95% $ 297,887 94% $ 287,621 95% Perpetual license 6,077 2% 6,948 2% 2,150 1% Total product revenue 287,631 97% 304,835 96% 289,771 96% Professional services 10,221 3% 12,468 4% 12,245 4% Total revenue 297,852 100% 317,303 100% 302,016 100% Cost of revenue: Subscription and support (1)(2) 88,894 30% 93,948 30% 92,168 31% Professional services and other 7,467 2% 9,793 3% 7,285 2% Total cost of revenue 96,361 32% 103,741 33% 99,453 33% Gross profit 201,491 68% 213,562 67% 202,563 67% Operating expenses: Sales and marketing (1) 64,342 22% 59,416 19% 55,097 18% Research and development (1) 49,375 17% 46,187 15% 42,693 14% General and administrative (1) 61,264 21% 70,462 22% 76,901 25% Depreciation and amortization 58,614 20% 43,669 14% 41,315 14% Acquisition-related expenses 3,060 —% 21,556 6% 21,234 8% Impairment of goodwill 128,755 43% 12,500 4% — —% Total operating expenses 365,410 123% 253,790 80% 237,240 79% Loss from operations (163,919) (55)% (40,228) (13)% (34,677) (12)% Other Expense: Interest expense, net (18,684) (6)% (29,145) (9)% (31,626) (10)% Other expense, net 236 —% (781) —% (253) (1)% Total other expense (18,448) (6)% (29,926) (9)% (31,879) (11)% Loss before benefit from income taxes (182,367) (61)% (70,154) (22)% (66,556) (23)% Benefit from income taxes 2,493 1% 1,741 —% 8,344 4% Net loss (179,874) (60)% (68,413) (22)% (58,212) (19)% Preferred stock dividends and accretion (5,347) (2)% (1,846) (1)% — —% Net loss attributable to common stockholders (3) $ (185,221) (62)% $ (70,259) (22)% $ (58,212) (19)% Net loss per common share: Loss from continuing operations per common share, basic and diluted (3) $ (5.77) $ (2.23) $ (1.92) Weighted-average common shares outstanding, basic and diluted (3) 32,074,906 31,528,881 30,295,769 42 (1) Includes stock-based compensation.
General and Administrative Expense Year Ended December 31, 2022 2021 Change Amount Percent of Revenue Amount Percent of Revenue Amount % Change (dollars in thousands) General and administrative $ 70,462 22% $ 76,901 25% $ (6,439) (8)% General and administrative expense was $70.5 million in 2022, compared to $76.9 million in 2021, a decrease of $6.4 million, or 8%.
General and Administrative Expense Year Ended December 31, 2023 2022 Change Amount Percent of Revenue Amount Percent of Revenue Amount % Change (dollars in thousands) General and administrative $ 61,264 21% $ 70,462 22% $ (9,198) (13)% General and administrative expense was $61.3 million in 2023, compared to $70.5 million in 2022, a decrease of $9.2 million, or 13%.
Other expense, net was $0.8 million in 2022, compared to other expense of $0.3 million in 2021, an increase of $0.5 million, or 209%. The difference in other expense is primarily due to an increase in foreign currency exchange losses compared to 2021.
Other income, net was $0.2 million in 2023, compared to other expense of $0.8 million in 2022, a change $1.0 million. The difference in other expense is primarily due to an increase in foreign currency exchange gains compared to 2022.
Sunset Assets During the fourth quarter of 2022, in connection with the periodic review of its business, the Company decided to sunset certain non-strategic product offerings and customer contracts (collectively referred to as “Sunset Assets”).
Sunset Assets In connection with periodic reviews of our business, we have decided to discontinue the availability of certain non-strategic product offerings and a limited number of non-strategic customer contracts (collectively referred to as “Sunset Assets”).
Benefit from Income Taxes Year Ended December 31, 2022 2021 Change Amount Percent of Revenue Amount Percent of Revenue Amount % Change (dollars in thousands) Loss before provision for income taxes (70,154) (22)% (66,556) (23)% (3,598) (5)% Benefit from (provision for) income taxes $ 1,741 —% $ 8,344 4% $ (6,603) (79)% Effective income tax rate (2.5) % (12.5) % Benefit from income taxes was $1.7 million in 2022, compared to a benefit for income taxes of $8.3 million in 2021, a decrease in the benefit from income taxes of $6.6 million, or 79%.
Benefit from Income Taxes Year Ended December 31, 2023 2022 Change Amount Percent of Revenue Amount Percent of Revenue Amount % Change (dollars in thousands) Benefit from (provision for) income taxes $ 2,493 1% $ 1,741 —% $ 752 43% Effective income tax rate (1.4) % (2.5) % Benefit from income taxes was $2.5 million in 2023, compared to a benefit for income taxes of $1.7 million in 2022, an increase in the benefit from income taxes of $0.8 million, or 43%.
Therefore, perpetual license revenue from our Organic Business decreased by $0.3 million in the year ended December 31, 2022 compared to the year ended December 31, 2021. Professional services revenue was $12.5 million in the year ended December 31, 2022, compared to $12.2 million in the year ended December 31, 2021, an increase of $0.3 million, or 2%.
Professional services revenue was $10.2 million in the year ended December 31, 2023, compared to $12.5 million in the year ended December 31, 2022, a decrease of $2.3 million, or 18%. Professional services revenue related to our Sunset Assets decreased by $0.4 million.
Depreciation and Amortization Expense 43 Year Ended December 31, 2022 2021 Change Amount Percent of Revenue Amount Percent of Revenue Amount % Change (dollars in thousands) Depreciation and amortization: Depreciation $ 1,529 1% $ 1,968 1% $ (439) (22)% Amortization 42,140 13% 39,347 13% 2,793 7% Total depreciation and amortization $ 43,669 14% $ 41,315 14% $ 2,354 6% Depreciation and amortization expense was $43.7 million in 2022, compared to $41.3 million in 2021, an increase of $2.4 million, or 6%.
Depreciation and Amortization Expense Year Ended December 31, 2023 2022 Change Amount Percent of Revenue Amount Percent of Revenue Amount % Change (dollars in thousands) Depreciation and amortization: Depreciation $ 1,414 1% $ 1,529 1% $ (115) (8)% Amortization 57,200 19% 42,140 13% 15,060 36% Total depreciation and amortization $ 58,614 20% $ 43,669 14% $ 14,945 34% Depreciation and amortization expense was $58.6 million in 2023, compared to $43.7 million in 2022, an increase of $14.9 million, or 34%.
Subscription and support revenues related to Overage Charges decreased by $3.8 million as a result of variable demand in the year ended December 31, 2022. The year ended December 31, 2021 included $1.0 million of subscription and support Political Revenues which did not repeat in the year ended December 31, 2022.
Subscription and support revenues related to overage charges decreased by $1.1 million as a result of variable demand fluctuations in the year ended December 31, 2023. The subscription and support revenue decline includes a negative impact of $0.3 million from changes in foreign currency exchange rates.
Cost of Revenue and Gross Profit Margin Year Ended December 31, 2022 2021 Change Amount Percent of Revenue Amount Percent of Revenue Amount % Change (dollars in thousands) Cost of revenue: Subscription and support (1) $ 93,948 30% $ 92,168 31% $ 1,780 2% Professional services 9,793 3% 7,285 2% 2,508 34% Total cost of revenue 103,741 33% 99,453 33% 4,288 4% Gross profit $ 213,562 67% $ 202,563 67% $ 10,999 5% (1) Includes depreciation and amortization expense as follows: Depreciation $ 8 —% $ 30 —% $ (22) (73)% Amortization $ 12,469 4% $ 11,583 4% $ 886 8% Cost of subscription and support revenue was $93.9 million in the year ended December 31, 2022, compared to $92.2 million in the year ended December 31, 2021, an increase of $1.7 million, or 2%.
The remaining decrease in professional services revenue is attributable to fewer implementation projects in the year ended December 31, 2023. 43 Cost of Revenue and Gross Profit Margin Year Ended December 31, 2023 2022 Change Amount Percent of Revenue Amount Percent of Revenue Amount % Change (dollars in thousands) Cost of revenue: Subscription and support (1) $ 88,894 30% $ 93,948 30% $ (5,054) (5)% Professional services 7,467 2% 9,793 3% (2,326) (24)% Total cost of revenue 96,361 32% 103,741 33% (7,380) (7)% Gross profit $ 201,491 68% $ 213,562 67% $ (12,071) (6)% (1) Includes depreciation and amortization expense as follows: Depreciation $ 5 —% $ 8 —% $ (3) (38)% Amortization $ 13,366 4% $ 12,469 4% $ 897 7% Cost of subscription and support revenue was $88.9 million in the year ended December 31, 2023, compared to $93.9 million in the year ended December 31, 2022, a decrease of $5.0 million, or 5%.
Therefore, cost of professional services revenue for our Organic Business decreased by $0.7 million primarily related to a decrease in personnel related costs. 42 Operating Expenses Sales and Marketing Expense Year Ended December 31, 2022 2021 Change Amount Percent of Revenue Amount Percent of Revenue Amount % Change (dollars in thousands) Sales and marketing $ 59,416 19% $ 55,097 18% $ 4,319 8% Sales and marketing expense was $59.4 million in the year ended December 31, 2022, compared to $55.1 million in the year ended December 31, 2021, an increase of $4.3 million, or 8%.
Operating Expenses Sales and Marketing Expense Year Ended December 31, 2023 2022 Change Amount Percent of Revenue Amount Percent of Revenue Amount % Change (dollars in thousands) Sales and marketing $ 64,342 22% $ 59,416 19% $ 4,926 8% Sales and marketing expense was $64.3 million in the year ended December 31, 2023, compared to $59.4 million in the year ended December 31, 2022, an increase of $4.9 million, or 8%.
Research and Development Expense Year Ended December 31, 2022 2021 Change Amount Percent of Revenue Amount Percent of Revenue Amount % Change (dollars in thousands) Research and development $ 46,187 15% $ 42,693 14% $ 3,494 8% Research and development expense was $46.2 million in 2022, compared to $42.7 million in 2021, an increase of $3.5 million, or 8%.
This increase is partially offset by a $2.1 million decrease in stock based compensation expense and a decrease of $1.8 million in sales and marketing expense related to our Sunset Assets. 44 Research and Development Expense Year Ended December 31, 2023 2022 Change Amount Percent of Revenue Amount Percent of Revenue Amount % Change (dollars in thousands) Research and development $ 49,375 17% $ 46,187 15% $ 3,188 7% Research and development expense was $49.4 million in 2023, compared to $46.2 million in 2022, an increase of $3.2 million, or 7%.
Goodwill and Other Intangible Assets ” in the notes to our consolidated financial statements for more information regarding our fourth quarter 2022 Goodwill impairment. 44 Other Expense, net Year Ended December 31, 2022 2021 Change Amount Percent of Revenue Amount Percent of Revenue Amount % Change (dollars in thousands) Other Expense: Interest expense, net $ (29,145) (9)% $ (31,626) (10)% $ 2,481 (8)% Other expense, net (781) —% (253) (1)% (528) 209% Total other expense $ (29,926) (9)% $ (31,879) (11)% $ 1,953 (6)% Interest expense, net was $29.1 million in 2022, compared to $31.6 million for 2021, a decrease of $2.5 million, or 8%, due primarily to higher interest income on our interest-bearing cash balances as well as a decrease in outstanding borrowings on our Credit Facility.
Other Expense, net Year Ended December 31, 2023 2022 Change Amount Percent of Revenue Amount Percent of Revenue Amount % Change (dollars in thousands) Other Expense: Interest expense, net $ (18,684) (6)% $ (29,145) (9)% $ 10,461 (36)% Other expense, net 236 —% (781) —% 1,017 (130)% Total other expense $ (18,448) (6)% $ (29,926) (9)% $ 11,478 (38)% Interest expense, net was $18.7 million in 2023, compared to $29.1 million for 2022, a change of $10.4 million, or 36%, due primarily to higher interest income on our interest-bearing cash balances, a decrease in outstanding borrowings on our Credit Facility and the $2.5 million amortization of the deferred gain on the liquidation of a portion of our interest rate swaps as well as a $2.8 million benefit related to the deferred gain recognized immediately into earnings upon the $35 million prepayment on our Term Loans.
Therefore, cost of subscription and support revenue for our Organic Business decreased by $1.1 million mainly due to decreased messaging costs. Cost of professional services revenue was $9.8 million in the year ended December 31, 2022, compared to $7.3 million in the year ended December 31, 2021, an increase of $2.5 million, or 34%.
Cost of professional services revenue was $7.5 million in the year ended December 31, 2023, compared to $9.8 million in the year ended December 31, 2022, a decrease of $2.3 million, or 24%. The decrease in cost of professional services revenue is primarily related to a decrease in personnel-related costs resulting from decreased professional services delivered.
(5) Core Organic Revenue excludes revenues from acquisitions closed during or subsequent to the prior year comparable period, revenue from Sunset Assets, Overage Charges and Political Revenue. 40 Comparison of Years Ended December 31, 2022 and December 31, 2021 Revenue Year Ended December 31, 2022 2021 Change Amount Percent of Revenue Amount Percent of Revenue Amount % Change (dollars in thousands) Revenue: Subscription and support $ 297,887 94% $ 287,621 95% $ 10,266 4% Perpetual license 6,948 2% 2,150 1% 4,798 223% Total product revenue 304,835 96% 289,771 96% 15,064 5% Professional services 12,468 4% 12,245 4% 223 2% Total revenue $ 317,303 100% $ 302,016 100% $ 15,287 5% Total revenue was $317.3 million in the year ended December 31, 2022, compared to $302.0 million in the year ended December 31, 2021, an increase of $15.3 million, or 5%.
Comparison of Years Ended December 31, 2023 and December 31, 2022 Revenue Year Ended December 31, 2023 2022 Change Amount Percent of Revenue Amount Percent of Revenue Amount % Change (dollars in thousands) Revenue: Subscription and support $ 281,554 95% $ 297,887 94% $ (16,333) (5)% Perpetual license 6,077 2% 6,948 2% (871) (13)% Total product revenue 287,631 97% 304,835 96% (17,204) (6)% Professional services 10,221 3% 12,468 4% (2,247) (18)% Total revenue $ 297,852 100% $ 317,303 100% $ (19,451) (6)% Subscription and support revenue was $281.6 million in the year ended December 31, 2023, compared to $297.9 million in the year ended December 31, 2022, a decrease of $16.3 million, or 5%. $13.9 million of the decrease relates to declining revenue from Sunset Assets as a result of reduced sales and marketing focus on those assets.
Income Taxes ”, in the notes to the consolidated financial statements for more information regarding our income taxes as they relate to foreign and domestic operations. Comparison of Years Ended December 31, 2021 and December 31, 2020 For a comparison of the years ended December 31, 2021 and 2020 refer to “
Comparison of Years Ended December 31, 2022 and December 31, 2021 For a comparison of the years ended December 31, 2022 and 2021 refer to “
The acquisitions not fully in the comparable period increased depreciation and amortization expense by $6.0 million, primarily related to acquired intangible assets such as customer relationships and tradenames. Therefore, depreciation and amortization expense for our Organic Business decreased by $3.6 million in the comparative periods due to assets becoming fully depreciated or amortized during the period.
The increase in amortization relates to the reduced useful life expected for the acquired intangible assets such as customer relationships and tradenames for our Sunset Assets. The offsetting decrease in depreciation is due to assets becoming fully depreciated during the period.
Refer to “Adjusted Operating Measures” detail located in this section for further breakdown for adjusted amounts. 34 Components of Operating Results Revenue Subscription and support revenue . We derive our subscription revenue from fees paid to us by our customers for use of our cloud-based applications.
In either case, we will adjust the revenues attributable to Sunset Assets for the then current period and properly reflect the year over year change for such addition or removal. Components of Operating Results Revenue Subscription and support revenue . We derive our subscription revenue from fees paid to us by our customers for use of our cloud-based applications.
As a result of the decline of our stock price during the quarter ended December 31, 2022, we performed a Goodwill impairment evaluation as of December 31, 2022, which resulted in a Goodwill impairment of $12.5 million. See “ Note 5.
This increase was a result of the goodwill impairment evaluation we performed as of March 31, 2023 due to the decline of our stock price.
General and administrative expense for our Sunset Assets decreased by $0.9 million. This was partially offset by an increase in general administrative expense of $4.3 million due to costs related to the acquisitions not fully in the comparable period, which consisted primarily of higher personnel related costs and administrative expenses.
This decrease was driven primarily by $15.2 million in lower non-cash stock compensation expense due to lower grant date fair values partially offset by an increase in general and administrative expense of $3.7 million due to higher personnel-related costs and an increase in legal and professional fees of $2.3 million, which includes $1.1 million in non-recurring litigation costs.
Sales and marketing expense for our Organic Business decreased by $1.2 million, primarily as a result of a reduction in personnel related costs which were partially offset by increased commission costs. We expect to see an increase in sales and marketing expense in 2023 as we increase our go to market investments.
Sales and marketing expense increased approximately $8.8 million as a direct result of our intentional investment in our go to market strategy, including increased marketing spend and increased sales headcount and personnel-related costs to strengthen our marketing and demand generation.