Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Operating activities
Net loss	$ (12,526)	$ (13,491)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	11,837	12,534
Non-cash interest	4,507	1,167
Stock-based compensation	825	910
Provision for losses on accounts receivable	784	633
Deferred income taxes	112	(106)
Change in fair value of contingent consideration	29
Changes in operating assets and liabilities:
Accounts receivable	(7,487)	(3,348)
Prepaid expenses and other assets	(8,151)	(9,170)
Accounts payable and accrued expenses	(588)	(6,686)
Deferred revenue	(1,298)	(783)
Net cash used in operating activities	(11,956)	(18,340)
Investing activities
Acquisitions, net of cash acquired	(2,334)
Purchases of property and equipment	(2,767)	(2,182)
Net cash used in investing activities	(5,101)	(2,182)
Financing activities
Revolving credit facility - draws	29,000	11,000
Revolving credit facility - repayments		(5,000)
Payments for capital lease obligations	(224)	(157)
Payments on long-term debt	(4,250)	(4,250)
Net cash provided by financing activities	24,526	1,593
Effect of foreign exchange rates	(265)	22
Net increase (decrease) in cash	7,204	(18,907)
Cash at beginning of period	43,407	23,439
Cash at end of period	50,611	4,532
Supplemental disclosure:
Cash paid for interest	8,704	11,022
Income taxes (refunds) paid, net of refunds	(266)	317
Significant noncash investing and financing activities
Purchases of property and equipment in accounts payable and accrued expenses on the consolidated balance sheets	$ 931	$ 112