CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended				9 Months Ended		12 Months Ended
	Sep. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Mar. 31, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023	Dec. 31, 2022
OPERATING ACTIVITIES:
Net loss	$ (28,309)	$ (35,631)	$ (53,312)	$ (17,420)	$ (22,145)	$ (59,910)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation expense					18,833	4,480
Depreciation					23,165	24,852
Reduction of operating lease right-of-use assets					4,130	0
Amortization of purchased intangible assets and finance leases					11,585	16,369
Amortization of debt issuance costs and debt discount					3,079	3,384
Impairment of goodwill	0		11,895		3,627	11,895	$ 11,895
Impairment of intangibles and other assets	0		2,959		10,568	2,959
Change in fair value of warrants	7,800				7,790	0	0
Change in fair value of contingent consideration					0	5,442
Gain on debt extinguishment					(73,083)	(7,200)
Allowance for credit losses					9,642	2,653	3,319
Gain on divestiture	0		0		558	(17,591)
Deferred income taxes					408	741
Equity loss in joint venture					0	2,264
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable					22,213	(16,390)
Prepaid expenses and other current assets					5,933	(18,028)
Contract acquisition costs					1,535	6,189
Other assets					268	1,390
Accounts payable					4,367	(13,420)
Accrued expenses and other current liabilities					(34,354)	21,225
Deferred revenue					(6,112)	12,691
Operating lease liabilities					(4,779)	(500)
Other liabilities					757	(7,797)
Net cash used in operating activities					(12,015)	(24,302)
INVESTING ACTIVITIES:
Purchases of property and equipment, including capitalized software					(21,504)	(22,437)
Purchases of intangible assets					(2,001)	(3,245)
Proceeds from divestiture					0	13,819
Net cash used in investing activities					(23,505)	(11,863)
FINANCING ACTIVITIES:
Principal payments for financing leases	(28)		(542)		(381)	(2,468)
Proceeds from issuance of common stock in connection with the exercise of options and ESPP					270	1,622
Proceeds from issuance of senior notes					50,000	0
Payments of Debt Issuance Costs					(7,359)	0
Net cash used in financing activities					(34,862)	(150,548)
Effect of foreign exchange rate changes on cash and cash equivalents					(439)	(1,164)
Net decrease in cash, cash equivalents, and restricted cash					(70,821)	(187,877)
Cash, cash equivalents, and restricted cash - beginning of year		$ 212,925		$ 392,198	212,925	392,198	392,198
Plus: cash classified within current assets held for sale - beginning of year							0	$ 10,011
Cash, cash equivalents, and restricted cash - end of period	142,104		214,332		142,104	214,332	212,925
Reconciliation of cash, cash equivalents, and restricted cash to condensed consolidated balance sheets
Cash and cash equivalents	142,104		212,189		142,104	212,189	210,782
Restricted cash	0		2,143		0	2,143	2,143
Total cash, cash equivalents, and restricted cash	$ 142,104		$ 214,332		142,104	214,332	$ 212,925	$ 392,198
Supplemental disclosure of other cash flow information:
Cash paid for income taxes, net					1,674	998
Cash paid for interest					292	909
Supplemental disclosure of non-cash investing and financing activities:
Purchase of property and equipment and intangible assets recorded in accounts payable					171	548
Right-of-use assets obtained in exchange for operating lease liabilities					111	4,817
2024 Notes
FINANCING ACTIVITIES:
Payments on repurchase of 2024 convertible senior notes					(72,491)	(149,702)
2026 Notes
FINANCING ACTIVITIES:
Payments on repurchase of 2024 convertible senior notes					$ (4,901)	$ 0