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, 2020	Dec. 31, 2019
Variable Interest Entity [Line Items]
Unbilled receivables	$ 2,719	$ 2,093
Prepaid expenses and other current assets	986	733
Total assets	22,887	23,855
Accounts payable	1,734	1,385
Deferred revenue	6,710	5,803
Total liabilities	50,340	47,764
Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Cash and cash equivalents	634	379
Accounts receivable	694	564
Unbilled receivables	26	0
Prepaid expenses and other current assets	17	26
Total assets	1,371	969
Accounts payable	21	9
Accrued liabilities	168	100
Deferred revenue	65	73
Intercompany payable	938	685
Total liabilities	$ 1,192	$ 867