Summary of Significant Accounting Policies - Credit Loss Rollforward (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 466	$ 408	$ 529
Provision for doubtful accounts	0	58	0
Write-offs of uncollectible receivables	(51)	0	(121)
Ending balance	$ 415	$ 466	$ 408