UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Income Statement [Abstract]
REVENUES	$ 133,817	$ 61,031
COST OF REVENUES (exclusive of depreciation and amortization shown below)	95,316	44,398
SELLING, GENERAL AND ADMINISTRATIVE EXPENSE	25,000	20,519
INITIAL PUBLIC OFFERING EXPENSE		531
FAIR VALUE CHANGES IN BUSINESS ACQUISITIONS CONTINGENT CONSIDERATION	11,064
DEPRECIATION AND AMORTIZATION	10,769	7,560
LOSS FROM OPERATIONS	(8,332)	(11,977)
OTHER EXPENSE
Other expense	(574)	(29,830)
Interest expense—net	(2,688)	(2,593)
Total other expenses—net	(3,262)	(32,423)
LOSS BEFORE EXPENSE (BENEFIT) FROM INCOME TAXES	(11,594)	(44,400)
INCOME TAXES EXPENSE (BENEFIT)	2	(3,152)
NET LOSS	(11,596)	(41,248)
EQUITY ADJUSTMENT FROM FOREIGN CURRENCY TRANSLATION	29	(3)
COMPREHENSIVE LOSS	(11,567)	(41,251)
ACCRETION OF REDEEMABLE SERIES A-1 PREFERRED STOCK		(5,415)
CONVERTIBLE AND REDEEMABLE SERIES A-2 PREFERRED STOCK DIVIDEND	(4,100)
NET LOSS ATTRIBUTABLE TO COMMON STOCKHOLDERS	$ (15,696)	$ (46,663)
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING— BASIC AND DILUTED	25,117	8,904
NET LOSS PER SHARE ATTRIBUTABLE TO COMMON STOCKHOLDERS— BASIC AND DILUTED	$ (0.62)	$ (5.24)