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Income Taxes - Components of provision for income taxes (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Current income tax expense:    
Foreign $ 1,131 $ 728
Federal 144 5
State and local 30 21
Current income tax expense (benefit) 1,305 754
Deferred income tax expense (benefit):    
Foreign 207 126
Federal 10 (38)
Deferred income tax expense (benefit) 217 88
Provision for income taxes $ 1,522 $ 842