UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended			6 Months Ended		12 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
OPERATING ACTIVITIES:
Net Loss	$ 13,224		$ (322)	$ (28,024)	$ (5,564)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
Provision for bad debt		$ 6,300		6,263	547	$ 1,246
Depreciation and amortization	9,784		6,401	17,344	12,850
Stock-based compensation expense	1,140		1,294	2,290	2,522
Fair value changes in the contingent put option	(22,602)			7,025
Fair value changes in the compound embedded option	756			756
Fair value changes in the contingent liabilities				3,983	(926)
Deferred income taxes				(4,911)	(896)
Cloud computing costs				(1,346)	(96)
Other				983	1,506
Changes in operating assets and liabilities—net of acquisitions:
Accounts receivable and contract assets				7,427	(5,642)
Prepaid expenses and other current assets				(789)	(91)
Accounts payable and other accrued liabilities				(8,296)	130
Accrued payroll and benefits				1,886	51
Payment of contingent consideration and other assumed purchase price obligations				(6,175)
Net cash (used in) provided by operating activities				(1,584)	4,391
INVESTING ACTIVITIES:
Purchases of property and equipment				(3,160)	(1,179)
Proprietary software development				(155)	(63)
Proceeds from net working capital adjustment related to acquisitions				2,819
Cash paid for acquisitions—net of cash acquired				(173,473)	(26,699)
Net cash used in investing activities				(173,969)	(27,941)
FINANCING ACTIVITIES:
Proceeds from line of credit				104,390	64,628
Payments on line of credit				(176,980)	(40,628)
Proceeds from term loans				175,000
Repayment of term loans				(48,750)
Payment of contingent consideration and other assumed purchase price obligations				(6,005)	(532)
Repayment of capital leases				(1,249)	(821)
Payments on deferred offering costs				(1,462)
Debt issuance cost				(4,866)
Debt extinguishment costs				(351)
Proceeds from issuance of common stock				21	95
Issuance of convertible and redeemable Series A-2 preferred stock and warrant				173,664
Net cash provided by financing activities				213,412	22,742
CHANGE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH				37,859	(808)
Foreign exchange impact on cash balance				71	(4)
Beginning of year		$ 6,884		6,884	2,489	2,489
End of period	$ 44,814		$ 1,677	44,814	1,677	$ 6,884
SUPPLEMENTAL DISCLOSURES OF CASH FLOWS INFORMATION:
Cash paid for interest				6,539	2,025
Cash paid for income tax				72	859
SUPPLEMENTAL DISCLOSURES OF NON-CASH INVESTING AND FINANCING ACTIVITIES:
Accrued purchases of property and equipment				814	555
Property and equipment purchased under capital leases				1,704	2,136
Accretion of the Redeemable Series A-1 Preferred Stock to redeemable value				11,059	9,311
Acquisitions unpaid contingent liabilities				44,994	5,388
Common stock issued to acquire new businesses				25,000	$ 3,363
Offering costs included in accounts payable and other accrued liabilities				$ 941