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Income Taxes (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Operating Loss Carryforwards [Line Items] |  |  |
Income (loss) before provision for income taxes | $ 17,602 | $ 7,072 | $ (1,026)
Current: |  |  |
Federal | 223 |  |
State | 91 | 15 | 27
Foreign | 3,119 | 2,016 | 535
Total current | 3,433 | 2,031 | 562
Deferred: |  |  |
Federal | (188) |  |
State | (1) |  |
Foreign | (2,151) |  |
Total deferred | (2,340) |  |
Total provision for income taxes | $ 1,093 | $ 2,031 | $ 562
Reconciliation of effective income tax rates and U.S. statutory federal income tax rate [Abstract] |  |  |
Statutory federal income tax rate (as a percent) | 21.00% | 21.00% | 21.00%
State income taxes, net of federal tax benefits (as a percent) | 0.40% | 0.20% | (2.10%)
Valuation allowance (as a percent) | (25.40%) | 0.80% | (173.00%)
Stock-based compensation (as a percent) | (3.20%) | (1.90%) | (21.80%)
Foreign tax rate differential (as a percent) | (8.60%) | 2.10% | 137.70%
Foreign tax incentives (as a percent) | (3.20%) | (3.80%) | 32.20%
Foreign income inclusion (as a percent) | 10.4 | 7.8 |
Gain from sale of IP | 16.90% |  |
Tax effect in equity method loss or gain from unconsolidated affiliates (as a percent) | (2.60%) | 1.10% | (47.80%)
Others (as a percent) | 0.50% | 1.40% | (1.00%)
Effective tax rate (as a percent) | 6.20% | 28.70% | (54.80%)
Deferred tax assets: |  |  |
Net operating loss carryforwards | $ 11,275 | $ 14,328 |
Accruals, reserves and other | 6,056 | 3,756 |
Credit carryforwards | 358 | 1,685 |
Operating lease liability | 125 | 178 |
Gross deferred tax assets | 17,814 | 19,947 |
Valuation allowance | (15,371) | (19,798) |
Total deferred tax assets | 2,443 | 149 |
Deferred tax liabilities: |  |  |
Operating lease right-of-use assets | (103) | (149) |
Total net deferred tax assets (included in other assets) | 2,340 |  |
Increase (decrease) in valuation allowance | $ (4,400) | 100 | $ 200
Realized benefits of tax rate reduction (as a percent) | 10.00% |  |
Unrecognized tax benefit would favorably impact the effective tax rate in future periods if recognized | $ 14,600 | 14,600 |
Domestic Tax Authority |  |  |
Deferred tax liabilities: |  |  |
Operating loss carryforwards | 43,500 |  |
Tax credit carryforwards | $ 400 |  |
Foreign Tax Authority |  |  |
Deferred tax liabilities: |  |  |
EIT income tax rate (as a percent) | 25.00% |  |
Preferential tax rate (as a percent) | 15.00% |  |
Benefit from foreign tax rate | $ 1,000 | $ 1,000 | $ 200

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