UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Income Statement [Abstract]
REVENUES	$ 131,428	$ 134,680
COST OF REVENUES (exclusive of depreciation and amortization shown below)	81,633	88,386
SELLING, GENERAL AND ADMINISTRATIVE EXPENSE	49,613	41,807
FAIR VALUE CHANGES IN BUSINESS ACQUISITIONS CONTINGENCIES	(398)	(21)
DEPRECIATION AND AMORTIZATION	10,555	12,144
LOSS FROM OPERATIONS	(9,975)	(7,636)
OTHER (EXPENSE) INCOME
Other (expense) income	(1,836)	2,461
Interest expense—net	(1,541)	(1,092)
Total other (expense) income - net	(3,377)	1,369
LOSS BEFORE EXPENSE FROM INCOME TAXES	(13,352)	(6,267)
INCOME TAX EXPENSE	1,367	1,269
NET LOSS	(14,719)	(7,536)
EQUITY ADJUSTMENT FROM FOREIGN CURRENCY TRANSLATION	12	81
COMPREHENSIVE LOSS	(14,707)	(7,455)
CONVERTIBLE AND REDEEMABLE SERIES A-2 PREFERRED STOCK DIVIDEND	(4,100)	(4,100)
NET LOSS ATTRIBUTABLE TO COMMON STOCKHOLDERS	$ (18,819)	$ (11,636)
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING - BASIC	29,857	29,662
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING - DILUTED	29,857	29,662
NET LOSS PER SHARE ATTRIBUTABLE TO COMMON STOCKHOLDERS - BASIC	$ (0.63)	$ (0.39)
NET LOSS PER SHARE ATTRIBUTABLE TO COMMON STOCKHOLDERS - DILUTED	$ (0.63)	$ (0.39)