Condensed Consolidated Statements of Cash Flows (Statement) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Cash flows from operating activities:
Net (loss) income	$ (24,628)	$ 44,894
Adjustments to reconcile net income (loss) income to net cash used in operating activities:
Depreciation and amortization	213	3,469
Non-cash lease expense related to operating lease right-of-use assets	0	281
Stock-based compensation	5,108	7,557
Gain on change in fair value of earn-out liability	(110)	(75,500)
Long-lived asset impairment	7,801	0
Loss on foreign currency exchange rates	17	0
Provision for doubtful accounts	312	(89)
Changes in operating assets and liabilities:
Accounts receivable and unbilled services	(1,033)	655
Prepaid expenses and other current assets	201	(571)
Other assets	31	1
Accounts payable	(2,543)	(5,294)
Accrued expenses and other current liabilities	(3,222)	(3,255)
Deferred revenue	(1,478)	(145)
Operating lease liabilities	(160)	(145)
Other, net	(120)	159
Net cash used in operating activities	(19,611)	(27,983)
Cash flows from investing activities:
Payments related to capitalized software development costs	(5,186)	(7,035)
Purchase of internal-use software	(750)	0
Purchases of property and equipment	(11)	(146)
Net cash used in investing activities	(5,947)	(7,181)
Cash flows from financing activities:
Proceeds from stock option exercises	12	114
Proceeds from issuance of stock under the employee stock purchase plan	75	0
Net cash provided by financing activities	87	114
Effect of foreign currency exchange rate changes on cash	24	0
Net decrease in cash and cash equivalents	(25,447)	(35,050)
Cash and cash equivalents, beginning of period	108,091	214,601
Cash and cash equivalents, end of period	82,644	179,551
Supplemental disclosures of non-cash activities
Balance in accounts payable, accrued expenses and other current liabilities, and capitalized stock-based compensation related to capitalized software and fixed asset additions	(2,068)	(4,101)
Balance in prepaid expenses and other current assets related to stock option exercises	$ 0	$ 17