Allowance for Credit Losses - Analysis of Allowance for Credit Losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	$ 74	$ 34	$ 34
Provision for credit losses	342	40	0
Balance at end of period	$ 416	$ 74	$ 34