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Income Taxes - Statutory united states federal income tax rate (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Federal income tax provision (benefit) at statutory rate	$ (27)	$ 4
State tax expense net of federal tax benefit	63	66
Foreign taxes	24	24
Other	42	(57)
Change in valuation allowance	629
Total income tax provision (benefit)	$ 605	$ (95)
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Federal income tax provision (benefit) at statutory rate (in percent)	21.00%	21.00%
State tax expense net of federal tax benefit (in percent)	49.00%	(366.70%)
Foreign taxes (in percent)	(18.50%)	133.30%
Other (in percent)	(33.10%)	(316.70%)
Change in valuation allowance (in percent)	489.00%
Income tax provision (benefit) (in percent)	470.60%	(527.80%)

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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