Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash flows from operating activities:
Net loss	$ (29,027)	$ (22,794)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	1,861	1,360
Provision for bad debts	(29)	54
Impairments and reduction in carrying amount of operating lease right-of-use assets	10,663	0
Impairments of fixed assets	3,649	0
Loss on extinguishment of debt and amortization of debt discount	0	2,799
Stock-based compensation expense	6,078	8,826
Change in fair value of financial instruments and other expenses	8	9,995
Change in fair value of contingent consideration	133	0
Deferred income taxes	(430)	92
Changes in assets and liabilities:
Accounts receivable	(2,694)	(3,743)
Prepaid expenses	(3,680)	(3,382)
Deferred implementation and commission costs	306	132
Other assets (current and non-current)	1,053	1,512
Accounts payable	(1,413)	668
Accrued expenses and other	(4,679)	(2,730)
Operating lease liabilities	(774)	0
Deferred revenue	(1,782)	(2,604)
Other liabilities (current and non-current)	629	(102)
Net cash used in operating activities	(20,128)	(9,917)
Cash flows from investing activities:
Purchases of marketable securities	(39)	(25,000)
Purchases of property and equipment	(454)	(503)
Purchase of business, net of acquired cash	(59,456)	0
Net cash used in investing activities	(59,949)	(25,503)
Cash flows from financing activities:
Payments on borrowings	0	(44,663)
Business Combination and PIPE financing	0	349,638
Payments of equity issuance costs	0	(19,936)
Debt extinguishment costs	0	(1,565)
Payment of deferred purchase price	(557)	0
Change in customer funds payable	(3,156)	261
Payments on finance leases	(23)	(65)
Proceeds from common stock issued	845	2,032
Taxes paid on net share issuance of stock-based compensation	(49)	(4,013)
Net cash provided by (used in) financing activities	(2,940)	281,689
Effect of exchange rate changes on cash, cash equivalents, and restricted cash	30	0
Net increase (decrease) in cash, cash equivalents, and restricted cash	(82,987)	246,269
Cash, cash equivalents, and restricted cash, beginning of period	212,809	38,843
Cash, cash equivalents, and restricted cash, end of period	129,822	285,112
Supplemental Disclosure of Cash Flow Information:
Cash paid for interest	0	133
Noncash Investing & Financing Activities:
Equity issuance costs charged to additional paid-in-capital	0	1,624
Issuance and vesting of earnout shares	0	237,008
Reclassification of stock warrant liability to equity	0	1,433
Contingent compensation consideration	586	0
Net assets acquired in Business Combination and other	$ 0	$ 255