Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended				9 Months Ended		12 Months Ended
	Sep. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Cash flows from operating activities:
Net income (loss)	$ (13,924)	$ (24,628)	$ (23,528)	$ 44,894	$ (58,130)	$ 15,533
Adjustments to reconcile net (loss) income to net cash used in operating activities:
Depreciation and amortization	164		4,870		520	12,569
Non-cash lease expense related to operating lease right-of-use assets					0	859
Stock-based compensation					12,286	19,425
Gain on change in fair value of earn-out liability	0		(1,200)		(110)	(97,600)
Long-lived asset impairment	5,533		0		19,013	0
Loss on foreign currency exchange rates					76	282
Provision for doubtful accounts					390	147	$ 798
Changes in operating assets and liabilities:
Accounts receivable and unbilled services					(2,023)	1,534
Prepaid expenses and other current assets					566	745
Other assets					14	(72)
Accounts payable					(902)	(8,100)
Accrued expenses and other current liabilities					(3,589)	(6,329)
Deferred revenue					(465)	1,165
Operating lease liabilities					(474)	(449)
Other, net					(297)	(86)
Net cash used in operating activities					(33,125)	(60,377)
Cash flows from investing activities:
Payments related to capitalized software development costs					(17,639)	(24,627)
Purchase of internal-use software					(750)	0
Purchases of property and equipment					(31)	(162)
Net cash used in investing activities					(18,420)	(24,789)
Cash flows from financing activities:
Proceeds from stock option exercises					68	672
Proceeds from issuance of stock under the employee stock purchase plan					119	0
Payments related to tax withholdings for share-based compensation					(343)	0
Net cash (used in) provided by financing activities					(156)	672
Effect of foreign currency exchange rate changes on cash					17	132
Net decrease in cash and cash equivalents					(51,684)	(84,362)
Cash and cash equivalents, beginning of period		$ 108,091		$ 214,601	108,091	214,601	214,601
Cash and cash equivalents, end of period	$ 56,407		$ 130,239		56,407	130,239	$ 108,091
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					(1,424)	(3,482)
Balance in prepaid expenses and other current assets related to stock option exercises					$ 0	$ 5