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Income Taxes - Reconciliation of Income Tax Provision (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Reconciliation of income tax provision:      
Provision at United States federal statutory rate $ 1,870 $ 954 $ (3,274)
Valuation allowance 1,975 (2,074) 3,267
Net operating loss carryback at 34% tax rate (137) (3,205) 0
Effect of foreign taxes 996 790 (209)
State and local tax expense (237) (372) (102)
Other (219) 289 (37)
Total income taxes $ 4,248 $ (3,618) $ (355)
Tax rate 34.00%