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Income Taxes - The Components of Net Deferred Income Tax Assets (Liabilities) (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Net deferred income tax assets: |  |
Accrued expenses and reserves | $ 9,470 | $ 12,587
Stock-based compensation | 3,807 | 3,285
Software | (1,435) | (1,532)
Goodwill | (11,563) | (9,109)
Net operating loss carryforwards | 31,548 | 26,893
Property and equipment | (6,136) | (8,816)
Deferred revenue | 3,578 | 4,020
State taxes | 2,020 | 1,804
Contingent payments | (123) | (1,017)
Foreign exchange gain/loss | 1,064 | 1,406
Operating lease right-of-use assets and lease liabilities | 1,768 | 1,962
Unrecognized tax benefit | 522 | 446
Credits and incentives | 951 | 612
Other | 1,337 | (546)
Total deferred income tax assets | 30,815 | 26,796
Less: valuation allowance | (29,983) | (21,700)
Net deferred income tax assets | 832 | 5,096
Client Contracts |  |
Net deferred income tax assets: |  |
Client contracts and related intangibles | $ (5,993) | $ (5,199)

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