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Income Taxes (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Operating Loss Carryforwards |  |  |
Income (loss) before provision for income taxes | $ 20,927,000 | $ 17,602,000 | $ 7,072,000
Current: |  |  |
Federal | 848,000 | 223,000 |
State | 34,000 | 91,000 | 15,000
Foreign | 918,000 | 3,119,000 | 2,016,000
Total current | 1,800,000 | 3,433,000 | 2,031,000
Deferred: |  |  |
Federal | (591,000) | (188,000) |
State | (4,000) | (1,000) |
Foreign | 980,000 | (2,151,000) |
Total deferred | 385,000 |  |
Total deferred | (104,000) | (2,340,000) |
Total provision for income taxes | $ 2,185,000 | $ 1,093,000 | $ 2,031,000
Reconciliation of effective income tax rates and U.S. statutory federal income tax rate |  |  |
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) | 0.10% | 0.40% | 0.20%
Valuation allowance (as a percent) | (19.30%) | (25.40%) | 0.80%
Stock-based compensation (as a percent) | 0.70% | (3.20%) | (1.90%)
Foreign tax rate differential (as a percent) | (2.60%) | (8.60%) | 2.10%
Foreign tax incentives (as a percent) | (3.50%) | (3.20%) | (3.80%)
Foreign income inclusion (as a percent) | 18.9 | 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) | (3.00%) | (2.60%) | 1.10%
Others (as a percent) | (1.80%) | 0.50% | 1.40%
Effective tax rate (as a percent) | 10.50% | 6.20% | 28.70%
Deferred tax assets: |  |  |
Net operating loss carryforwards | $ 9,571,000 | $ 11,275,000 |
Accruals, reserves and other | 4,053,000 | 6,056,000 |
Credit carryforwards | 206,000 | 358,000 |
Operating lease liability | 60,000 | 125,000 |
Gross deferred tax assets | 13,890,000 | 17,814,000 |
Valuation allowance | (11,885,000) | (15,371,000) |
Total deferred tax assets | 2,005,000 | 2,443,000 |
Deferred tax liabilities: |  |  |
Operating lease right-of-use assets | (50,000) | (103,000) |
Total net deferred tax assets (included in other assets) | 1,955,000 | 2,340,000 |
Increase (decrease) in valuation allowance | $ (3,500,000) | (4,400,000) |
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 | $ 1,100,000 | 1,100,000 |
Domestic Tax Authority |  |  |
Deferred tax liabilities: |  |  |
Operating loss carryforwards | 31,900,000 |  |
State |  |  |
Deferred tax liabilities: |  |  |
Operating loss carryforwards | $ 21,000 |  |
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 | $ 900,000 | $ 1,000,000.0 | $ 1,000,000.0

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