CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash flows from operating activities
Net loss	$ (65,928)	$ (58,884)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	16,860	21,478
Non-cash leases expense	6,188	6,593
Gain on lease modification	(6,370)	0
Stock-based compensation expense, net of amounts capitalized	51,844	49,172
Deferred income taxes	395	197
Bad debt expense	1,191	590
Impairment of property and equipment	1,411	0
Other	844	310
Changes in assets and liabilities:
Accounts receivable	(2,151)	840
Prepaid expenses and other assets	(11,529)	(7,530)
Accounts payable and accrued liabilities	(3,272)	12,691
Accrued compensation	(487)	(1,052)
Deferred revenue	17,350	26,678
Operating lease liabilities	(7,596)	(7,522)
Net cash provided by (used in) operating activities	(1,250)	43,561
Cash flows from investing activities
Purchases of property and equipment	(449)	(322)
Capitalized internal-use software	(4,955)	(4,418)
Net cash used in investing activities	(5,404)	(4,740)
Cash flows from financing activities
Proceeds from stock option exercises	2,827	17,703
Proceeds from employee stock purchase plan	2,751	3,873
Payments to repurchase common stock	(68,497)	0
Repayment of debt	(26,100)	(1,100)
Net cash provided by (used in) financing activities	(89,019)	20,476
Effect of exchange rate changes on cash	(448)	101
Net increase (decrease) in cash, cash equivalents and restricted cash	(96,121)	59,398
Cash, cash equivalents and restricted cash at beginning of period	306,121	224,614
Cash, cash equivalents and restricted cash at end of period	210,000	284,012
Supplemental cash flow data:
Interest paid for term debt	4,210	4,267
Income taxes paid	664	618
Non-cash investing and financing transactions:
Stock compensation included in capitalized software costs	1,448	1,136
Lease liabilities arising from obtaining right-of-use assets, net of terminations and modifications	$ (13,620)	$ 2,676