Income Taxes - Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at beginning of year	$ 1,864	$ 1,426	$ 1,563
Decreases related to prior year tax positions	(37)	(32)	(291)
Increases related to prior year tax positions	0	0	25
Increases related to current year tax positions	919	470	129
Balance at end of year	$ 2,746	$ 1,864	$ 1,426