Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash flows from operating activities:
Net loss	$ (105,286)	$ (81,392)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	1,900	1,781
Share-based compensation expense	72,153	66,928
Non-cash operating leases expense	1,111	1,058
Amortization of premium on marketable securities	338	716
Impairment of other financial instruments	11,616	0
Other	326	2,974
Changes in operating assets and liabilities:
Accounts receivable	5,067	2,416
Settlements receivable	833	3,269
Network incentives receivable	17,133	(17,415)
Prepaid expenses and other assets	(14,982)	354
Accounts payable	(1,609)	(18)
Revenue share payable	(4,092)	3,824
Accrued expenses and other liabilities	(6,987)	22,738
Operating lease liabilities	(1,464)	(1,420)
Net cash (used in) provided by operating activities	(23,943)	5,813
Cash flows from investing activities:
Purchases of property and equipment	(868)	(1,096)
Purchases of marketable securities	(12,999)	(13,145)
Maturities of marketable securities	12,900	57,188
Net cash (used in) provided by investing activities	(967)	42,947
Cash flows from financing activities:
Proceeds from initial public offering, net of underwriters’ discounts and commissions	0	1,319,809
Proceeds from exercise of stock options, including early exercised stock options, net of repurchase of early exercised unvested options	3,407	2,539
Proceeds from shares issued in connection with employee stock purchase plan	2,775	0
Taxes paid related to net share settlement of restricted stock units	(8,580)	(10,273)
Payment of deferred offering costs	0	(1,981)
Net cash (used in) provided by financing activities	(2,398)	1,310,094
Net (decrease) increase in cash, cash equivalents, and restricted cash	(27,308)	1,358,854
Cash, cash equivalents, and restricted cash- Beginning of period	1,255,381	228,233
Cash, cash equivalents, and restricted cash - End of period	1,228,073	1,587,087
Reconciliation of cash, cash equivalents, and restricted cash
Cash and cash equivalents	1,220,273	1,579,287
Restricted cash	7,800	7,800
Total cash, cash equivalents, and restricted cash	1,228,073	1,587,087
Supplemental disclosures of cash flow information:
Cash paid for income taxes	84	0
Supplemental disclosures of non-cash investing and financing activities:
Purchase of property and equipment accrued and not yet paid	1,184	1,476
Deferred offering costs not yet paid	$ 0	$ 1,153