Income Taxes - Current and deferred expense for income tax (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Current expense (benefit):
Foreign		$ (37)
Total current expense (benefit):		(37)
Deferred expense (benefit):
Foreign	$ 147	13
Total deferred expense (benefit):	147	13
Total income tax expense (benefit):	$ 147	$ (24)