UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
CASH FLOWS FROM OPERATING ACTIVITIES
Net (loss) income	$ (7,955)	$ 591
Adjustments to reconcile net (loss) income net cash provided by operations
Depreciation and amortization	15,770	15,122
Deferred income taxes	(14,306)	209
Stock-based compensation	9,342	8,043
Impairments and disposals of long-lived assets	168	106
Provision for bad debts	240	244
Amortization of financing fees	269	269
Amortization of debt discount	204	194
Deferred rent	(428)	39
Unrealized translation gain on investment in foreign subsidiaries	18	135
Change in fair value of contingent consideration, net	4,000	0
Interest rate swap settlements	0	23
Changes in operating assets and liabilities, net of acquisitions
Accounts receivable	(7,285)	(3,414)
Insurance receivable	41	0
Prepaid expenses	(1,276)	2,844
Other assets	(1,200)	(2,534)
Accounts payable	7,149	3,716
Litigation settlement obligation	(55)	315
Accrued expenses	6,723	(12,256)
Other liabilities	(7,745)	(2,364)
Net cash provided by operations	3,674	11,282
CASH FLOWS FROM INVESTING ACTIVITIES
Purchases of property and equipment	(673)	(140)
Purchases of intangible assets and capitalized software	(4,947)	(4,120)
Acquisitions, net of cash acquired	(70,479)	(48,802)
Proceeds from disposition of property and equipment	0	7
Net cash used in investing activities	(76,099)	(53,055)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from exercise of employee stock options	53,629	0
Proceeds from employee stock purchase plan	695	0
Repurchases of common stock	(6,832)	(7,711)
Payments of long-term debt	(3,750)	(1,875)
Borrowings on revolving credit facility	65,000	0
Payment of contingent consideration for acquisition	0	(305)
Net cash provided by (used in) financing activities	85,667	(10,378)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	(487)	20
NET CHANGE IN CASH AND CASH EQUIVALENTS	12,755	(52,131)
Beginning of period	54,224	103,095	$ 103,095
Cash and cash equivalents at end of period	66,979	50,964	$ 54,224
Cash paid during the period for
Interest, net of capitalized amounts of $129 and $90 for the three months ended March 31, 2024 and 2023, respectively	9,102	11,602
Income taxes	9,542	2,978
Noncash investing activities
Purchases of property and equipment in accounts payable and accrued expenses	469	69
Noncash purchase price of business combinations	2,750	4,821
Stock options
CASH FLOWS FROM FINANCING ACTIVITIES
Cash paid for tax withholding	(19,172)	0
Restricted stock
CASH FLOWS FROM FINANCING ACTIVITIES
Cash paid for tax withholding	$ (3,903)	$ (487)