CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Operating activities
Net loss	$ (8,417)	$ (8,390)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization expense	4,586	3,303
Amortization of debt discount and issuance costs	4,367	10
Amortization of contract acquisition costs	3,004	2,166
Loss (gain) on disposal of fixed assets	124	(3)
Credit loss expense	127
Stock-based compensation expense	6,191	4,639
Operating leases, net	(71)	251
Deferred taxes	(113)
Net changes in operating assets and liabilities
Accounts receivable	31,284	30,313
Prepayments and other current assets	(1,380)	(3,007)
Other non-current assets	142	(1,296)
Accounts payable	(716)	(1,241)
Accrued expenses and other liabilities	(14,742)	(6,482)
Income taxes	(874)	1,120
Deferred revenue	(7,053)	(4,155)
Net cash provided by operating activities	16,459	17,228
Investing activities
Purchase of property and equipment	(239)	(2,306)
Proceeds from sale of property and equipment	10	11
Net cash used in investing activities	(229)	(2,295)
Financing activities
Payment of debt issuance costs		(829)
Taxes associated with net issuances of shares upon vesting of restricted stock units	(155)
Exercise of stock options	1,317	1,172
Net cash provided by financing activities	1,162	343
Net increase in cash, cash equivalents and restricted cash	17,392	15,276
Cash, cash equivalents and restricted cash, beginning of period	450,120	77,236
Cash, cash equivalents and restricted cash, end of period	$ 467,512	$ 92,512