Financing Receivables - Summary of Financing Receivables by Credit Quality Indicator (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Past Due [Line Items]
Total financing receivables with contractual maturities of one year or less	$ 121	$ 1,973
Less: allowance for credit losses	(722)	(1,489)	$ (2,971)
Long-term financing arrangements, net	13,719	22,298
Total Past Due
Financing Receivable, Past Due [Line Items]
Total uninvoiced client financing receivables of clients with no related trade accounts receivable	864	2,169
Total Past Due | Trade Accounts Receivable
Financing Receivable, Past Due [Line Items]
Total uninvoiced client financing receivables of clients with no related trade accounts receivable	9,815	15,479
1 to 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Total uninvoiced client financing receivables of clients with no related trade accounts receivable	713	1,270
1 to 90 Days Past Due | Trade Accounts Receivable
Financing Receivable, Past Due [Line Items]
Total uninvoiced client financing receivables of clients with no related trade accounts receivable	9,100	11,719
91 to 180 Days Past Due
Financing Receivable, Past Due [Line Items]
Total uninvoiced client financing receivables of clients with no related trade accounts receivable	78	227
91 to 180 Days Past Due | Trade Accounts Receivable
Financing Receivable, Past Due [Line Items]
Total uninvoiced client financing receivables of clients with no related trade accounts receivable	329	1,092
181 + Days Past Due
Financing Receivable, Past Due [Line Items]
Total uninvoiced client financing receivables of clients with no related trade accounts receivable	73	672
181 + Days Past Due | Trade Accounts Receivable
Financing Receivable, Past Due [Line Items]
Total uninvoiced client financing receivables of clients with no related trade accounts receivable	386	2,668
Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Total uninvoiced client financing receivables of clients with no related trade accounts receivable	$ 4,505	$ 6,335