Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash flows from operating activities:
Net loss	$ (90,363)	$ (93,377)	$ (74,983)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	5,620	4,662	3,093
Stock-based compensation expense	88,285	67,223	34,394
Other	(301)	42	1,802
Non-cash operating lease costs	3,917	3,731	0
Changes in operating assets and liabilities:
Accounts receivable	(8,448)	(2,427)	(3,033)
Prepaid expenses and other current assets	3,711	(1,014)	(12,222)
Deferred commissions	(1,670)	(8,032)	(9,245)
Other noncurrent assets	2,050	5,036	(4,491)
Accounts payable	2,498	(2,884)	(1,054)
Accrued expenses	11,873	4,574	5,556
Deferred revenue	12,580	20,698	28,470
Operating lease liabilities	(4,122)	(3,616)	0
Net cash provided by (used in) operating activities	25,630	(5,384)	(31,713)
Cash flows from investing activity:
Cash received from maturities of marketable securities	12,500	0	0
Purchases of marketable securities	0	(83,190)	0
Purchase of property and equipment	(1,279)	(3,632)	(1,529)
Capitalization of internal-use software costs	(1,904)	(2,177)	(1,693)
Cash paid for acquisitions, net of cash acquired	0	(394)	(1,724)
Net cash provided by (used in) investing activities	9,317	(89,393)	(1,498)
Cash flows from financing activity:
Proceeds from the exercise of stock options	4,619	6,910	21,783
Proceeds from issuance of redeemable convertible preferred stock, net	0	0	199,802
Cash received for tax withholding obligations on equity award settlements	13,427	17,992	145,481
Cash paid for tax withholding obligations on equity award settlements	(22,334)	(19,056)	(144,420)
Repurchase of unvested stock options	(648)	(15)	(3)
Net cash provided by (used in) financing activities	(4,936)	5,831	222,643
Net increase (decrease) in cash, cash equivalents, and restricted cash	30,011	(88,946)	189,432
Cash, cash equivalents, and restricted cash at beginning of year	219,349	308,295	118,863
Cash, cash equivalents, and restricted cash at end of year	249,360	219,349	308,295
Supplemental disclosure of cash flow information:
Cash paid for income taxes	454	424	182
Noncash investing and financing activity:
Vesting of early exercised options	715	2,323	1,881
Purchases of property and equipment included in liabilities	86	11	0
Stock-based compensation capitalized as internal-use software costs	$ 1,737	$ 1,353	$ 379