Significant Clients - Additional Information (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($) Client	Dec. 31, 2020 USD ($) Client	Dec. 31, 2019 USD ($) Client
Segment Reporting Information [Line Items]
Accounts receivable, net	$ 84,252	$ 76,892
Number of major client | Client	0	0	0
IBM [Member]
Segment Reporting Information [Line Items]
Revenue	$ 74,800	$ 77,500	$ 84,900
Services agreement expiration date	Oct. 27, 2023
Accounts receivable, net	$ 8,900	$ 11,300
IBM [Member] | Customer Concentration Risk [Member] | Sales Revenue, Services, Net [Member]
Segment Reporting Information [Line Items]
Revenue, percent	19.10%	21.20%	21.50%