Inventories - Reserve Rollforward (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Inventory, Reserve [Roll Forward]
Beginning balance	$ (3,050)	$ (2,894)
Accrual	(145)	(101)
Reduction due to sold inventory	16	12
Reserves for excess, obsolete, and slow-moving inventories	$ (3,179)	$ (2,983)