CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash flows from operating activities
Net loss	$ (37,377)	$ (29,647)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	9,354	10,694
Non-cash leases expense	3,202	3,340
Stock-based compensation expense, net of amounts capitalized	26,254	23,599
Deferred income taxes	217	99
Bad debt expense	644	307
Other	(727)	(508)
Changes in assets and liabilities:
Accounts receivable	(1,047)	(76)
Prepaid expenses and other assets	(8,117)	(4,682)
Accounts payable and accrued liabilities	(2,341)	9,251
Accrued compensation	(6,898)	(9,274)
Deferred revenue	14,283	16,985
Operating lease liabilities	(3,801)	(3,786)
Net cash provided by (used in) operating activities	(4,900)	17,318
Cash flows from investing activities
Purchases of property and equipment	(441)	0
Capitalized internal-use software	(2,565)	(2,268)
Net cash used in investing activities	(3,006)	(2,268)
Cash flows from financing activities
Proceeds from stock option exercises	2,273	9,553
Payments to repurchase common stock	(36,376)	0
Repayment of debt	(25,550)	(550)
Net cash provided by (used in) financing activities	(59,653)	9,003
Effect of exchange rate changes on cash	393	(309)
Net increase (decrease) in cash, cash equivalents and restricted cash	(67,166)	23,744
Cash, cash equivalents and restricted cash at beginning of period	306,121	224,614
Cash, cash equivalents and restricted cash at end of period	238,955	248,358
Supplemental cash flow data:
Interest paid for term debt	2,009	2,177
Non-cash investing and financing transactions:
Stock compensation included in capitalized software costs	719	559
Accrued unpaid capital expenditures	207	547
Lease liabilities arising from obtaining right-of-use assets, net	$ 0	$ 2,676