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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