Inventories - Reserve Rollforward (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Inventory, Reserve [Roll Forward]
Beginning balance	$ (2,894)	$ (3,518)
Accrual	(281)	281
Reduction due to sold inventory	125	343
Reserves for excess, obsolete, and slow-moving inventories	$ (3,050)	$ (2,894)