Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Cash flows from operating activities:
Net loss	$ (127,598)	$ (105,286)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	4,474	1,900
Share-based compensation expense	90,164	72,153
Non-cash postcombination compensation expense	32,430	0
Non-cash operating leases expense	1,231	1,111
Amortization of premium (accretion of discount) on short-term investments	(2,311)	338
Impairment of other financial instruments	0	11,616
Other	499	326
Changes in operating assets and liabilities:
Accounts receivable	63	5,067
Settlements receivable	7,513	833
Network incentives receivable	(24,402)	17,133
Prepaid expenses and other assets	14,467	(14,982)
Accounts payable	(3,239)	(1,609)
Revenue share payable	(16,341)	(4,092)
Accrued expenses and other liabilities	(11,828)	(6,987)
Operating lease liabilities	(1,642)	(1,464)
Net cash used in operating activities	(36,520)	(23,943)
Cash flows from investing activities:
Purchases of property and equipment	(668)	(868)
Capitalization of internal-use software	(6,395)	0
Business combination, net of cash acquired	(131,914)	0
Purchases of short-term investments	(279,548)	(12,999)
Maturities of short-term investments	296,000	12,900
Net cash used in investing activities	(122,525)	(967)
Cash flows from financing activities:
Proceeds from exercise of stock options, including early exercised stock options, net of repurchase of early exercised unvested options	2,299	3,407
Proceeds from shares issued in connection with employee stock purchase plan	1,775	2,775
Taxes paid related to net share settlement of restricted stock units	(10,070)	(8,580)
Repurchase of common stock	(67,073)	0
Net cash used in financing activities	(73,069)	(2,398)
Net decrease in cash, cash equivalents, and restricted cash	(232,114)	(27,308)
Cash, cash equivalents, and restricted cash- Beginning of period	1,191,646	1,255,381
Cash, cash equivalents, and restricted cash - End of period	959,532	1,228,073
Reconciliation of cash, cash equivalents, and restricted cash
Cash and cash equivalents	950,157	1,220,273
Restricted cash	9,375	7,800
Total cash, cash equivalents, and restricted cash	959,532	1,228,073
Supplemental disclosures of cash flow information:
Cash paid for operating lease liabilities	2,096	2,039
Cash paid for income taxes	915	84
Supplemental disclosures of non-cash investing and financing activities:
Purchase of property and equipment accrued and not yet paid	137	1,184
Share-based compensation capitalized to internal-use software	2,282	0
Repurchase of common stock, including excise tax, accrued and not yet paid	$ 2,417	$ 0