CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($)	3 Months Ended				6 Months Ended		12 Months Ended
	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023	Dec. 31, 2022
OPERATING ACTIVITIES:
Net income (loss)	$ 41,795,000	$ (35,631,000)	$ 10,822,000	$ (17,420,000)	$ 6,164,000	$ (6,598,000)
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Stock-based compensation expense					13,458,000	(6,816,000)
Depreciation					15,939,000	17,088,000
Reduction of operating lease right-of-use assets					3,886,000	1,211,000
Amortization of purchased intangible assets and finance leases					7,899,000	10,889,000
Amortization of debt issuance costs and debt discount					1,343,000	2,727,000
Impairment of goodwill	0		0		3,627,000	0	$ 11,895,000
Impairment of intangibles and other assets	8,347,000		0		10,568,000	0
Change in fair value of contingent consideration					0	(5,304,000)
Gain on debt extinguishment					(73,083,000)	(7,200,000)
Allowance for credit losses		3,319,000			8,928,000	1,809,000
Gain on divestiture					558,000	(17,591,000)
Deferred income taxes					199,000	722,000
Equity loss in joint venture					0	1,384,000
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable					16,247,000	(20,537,000)
Prepaid expenses and other current assets					8,673,000	(9,126,000)
Contract acquisition costs					7,000	3,534,000
Other assets					47,000	75,000
Accounts payable					629,000	(19,757,000)
Accrued expenses and other current liabilities					(35,894,000)	16,737,000
Deferred revenue					(2,269,000)	15,652,000
Operating lease liabilities					(4,542,000)	(1,648,000)
Other liabilities					784,000	(7,800,000)
Net cash used in operating activities					(16,832,000)	(30,549,000)
INVESTING ACTIVITIES:
Purchases of property and equipment, including capitalized software					(16,457,000)	(16,997,000)
Purchases of intangible assets					(1,259,000)	(2,457,000)
Proceeds from divestiture					0	13,819,000
Net cash used in investing activities					(17,716,000)	(5,635,000)
FINANCING ACTIVITIES:
Principal payments for financing leases	(26,000)		(968,000)		(353,000)	(1,926,000)
Proceeds from issuance of common stock in connection with the exercise of options and ESPP					180,000	1,256,000
Proceeds from issuance of senior notes					50,000,000	0
Payments of Debt Issuance Costs					(4,231,000)	0
Net cash used in financing activities					(31,797,000)	(150,372,000)
Effect of foreign exchange rate changes on cash and cash equivalents					(623,000)	789,000
Net decrease in cash, cash equivalents, and restricted cash					(66,968,000)	(185,767,000)
Cash, cash equivalents, and restricted cash - beginning of year		$ 212,925,000		$ 392,198,000	212,925,000	392,198,000	392,198,000
Plus: cash classified within current assets held for sale - beginning of year							0	$ 10,011,000
Cash, cash equivalents, and restricted cash - end of period	145,957,000		216,442,000		145,957,000	216,442,000	212,925,000
Reconciliation of cash, cash equivalents, and restricted cash to condensed consolidated balance sheets
Cash and cash equivalents	145,957,000		213,763,000		145,957,000	213,763,000	210,782,000
Restricted cash	0		2,679,000		0	2,679,000	2,143,000
Total cash, cash equivalents, and restricted cash	$ 145,957,000		$ 216,442,000		145,957,000	216,442,000	$ 212,925,000	$ 392,198,000
Supplemental disclosure of other cash flow information:
Cash paid for income taxes, net					1,203,000	1,112,000
Cash paid for interest					292,000	904,000
Supplemental disclosure of non-cash investing and financing activities:
Purchase of property and equipment and intangible assets recorded in accounts payable					154,000	581,000
Right-of-use assets obtained in exchange for operating lease liabilities					107,000	132,000
2024 Notes
FINANCING ACTIVITIES:
Payments on repurchase of 2024 convertible senior notes					(72,492,000)	(149,702,000)
2026 Notes
FINANCING ACTIVITIES:
Payments on repurchase of 2024 convertible senior notes					$ (4,901,000)	$ 0