Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Operating activities
Net loss	$ (27,444)	$ (24,939)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	23,816	25,063
Non-cash interest	9,428	2,365
Stock-based compensation	1,639	1,489
Provision for losses on accounts receivable	2,155	1,332
Deferred income taxes	296	(130)
Change in fair value of contingent consideration	58
Changes in operating assets and liabilities:
Accounts receivable	5,866	(9,861)
Prepaid expenses and other assets	(6,519)	(4,078)
Accounts payable and accrued expenses	(711)	(3,359)
Deferred revenue	146	236
Net cash provided by (used in) operating activities	8,730	(11,882)
Investing activities
Acquisitions, net of cash acquired	(3,124)
Purchases of property and equipment	(5,875)	(5,140)
Net cash used in investing activities	(8,999)	(5,140)
Financing activities
Revolving credit facility - draws	29,000	21,500
Revolving credit facility - repayments	(29,000)	(14,500)
Payments for capital lease obligations	(455)	(307)
Payments on long-term debt	(8,500)	(8,500)
Net cash used in financing activities	(8,955)	(1,807)
Effect of foreign exchange rates	(84)	14
Net decrease in cash	(9,308)	(18,815)
Cash at beginning of period	43,407	23,439
Cash at end of period	34,099	4,624
Supplemental disclosure:
Cash paid for interest	17,248	18,747
Income taxes (refunds) paid, net of refunds	(297)	107
Significant noncash investing and financing activities
Purchases of property and equipment in accounts payable and accrued expenses on the consolidated balance sheets	$ 193	$ 220