Income Taxes - Components of Income Tax Benefit (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
United States federal income taxes:
Deferred	$ 37	$ 37	$ 37
Foreign income taxes:
Current	(39)	7	74
Deferred	(198)	(215)	(204)
State income taxes:
Deferred	11	11	11
Total income tax benefit from continuing operations	$ (189)	$ (160)	$ (82)