Summary of Significant Accounting Policies - Accounts Receivable (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Financing Receivable, Allowance for Credit Loss [Line Items]
Unbilled receivables	$ 4,800	$ 2,100
Provisions for expected losses	100	1,000
Writeoffs charged against allowance for credit losses	4,105	2,620	$ 1,216
Allowance for reserves	2,761	3,106	$ 539	$ 367
Financing Receivable
Financing Receivable, Allowance for Credit Loss [Line Items]
Writeoffs charged against allowance for credit losses	200	600
Allowance for reserves	500	600
Sales Credits And Specific Reserves
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for reserves	$ 1,900	$ 2,300