Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
CASH FLOWS FROM OPERATING ACTIVITIES
Net loss	$ (21,231)	$ (51,233)
Adjustments to reconcile net loss to net cash provided by operations
Depreciation and amortization	61,193	68,441
Deferred income taxes	(13,349)	(4,117)
Stock-based compensation	27,236	1,756
Impairments of long-lived assets	2,940	680
Provision for bad debts	604	623
Amortization of financing fees	362	373
Amortization of debt discount	1,741	1,767
Deferred rent	(1,334)	(76)
Unrealized translation gain on investment in foreign subsidiaries	(100)	(514)
Changes in fair value of derivatives	(5,024)	7,406
Excess payment on contingent consideration for acquisition	(1,159)
Changes in operating assets and liabilities
Accounts receivable	(40,383)	552
Insurance receivable	750
Prepaid expenses	(1,421)	(2,802)
Other assets	1,464	2,380
Accounts payable	12,116	563
Litigation settlement obligation	(750)
Accrued expenses	15,609	(7,995)
Other liabilities	(338)	8,049
Net cash provided by operating activities	38,926	25,853
CASH FLOWS FROM INVESTING ACTIVITIES
Purchases of property and equipment	(2,619)	(1,835)
Purchases of intangible assets and capitalized software	(11,987)	(11,250)
Proceeds from disposition of property and equipment	7	236
Net cash used in investing activities	(14,599)	(12,849)
CASH FLOWS FROM FINANCING ACTIVITIES
Issuance of common stock	2,483	1,200
Proceeds from issuance of common stock in IPO net of underwriting discounts and commissions	102,638
Payments of IPO issuance costs	(6,120)
Capital contribution from certain Stockholders	15,576
Payments of long-term debt	(11,531)	(4,846)
Repayments of revolving credit facility		(83,800)
Borrowings on revolving credit facility		83,800
Payment of contingent consideration for acquisition	(738)
Payments on equipment capital lease obligations	(8)	(5)
Net cash (used in) provided by financing activities	102,300	(3,651)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	(863)	(2,194)
NET CHANGE IN CASH AND CASH EQUIVALENTS	125,764	7,159
Beginning of period	66,633	50,299
Cash and cash equivalents at end of period	192,397	57,458
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION
Cash paid during the period for Interest, net of capitalized amounts of $300 and $220 for the nine months ended September 30, 2020 and 2021, respectively	21,494	20,502
Income taxes	4,663	$ 3,702
Offering costs included in accounts payable and accrued liabilities	$ 1,996