Variable Interest Entities - Summary of Amounts and Classification of Assets and Liabilities of the VIE in Our Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Variable Interest Entity [Line Items]
Cash and cash equivalents	$ 92,467	$ 86,907
Unbilled receivables	3,669	4,426
Prepaid and other current assets	4,204	4,144
Total assets	144,928	144,701
Accounts payable	1,297	1,287
Deferred revenue	24,940	20,954
Total liabilities	88,261	83,950
Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Cash and cash equivalents	408	1,206
Accounts receivable	449	0
Unbilled receivables	136	272
Prepaid and other current assets	30	46
Total assets	1,023	1,524
Accounts payable	23	9
Accrued liabilities	128	234
Deferred revenue	35	76
Intercompany payable	1,275	1,695
Total liabilities	$ 1,461	$ 2,014