Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Net loss	$ (17,845)	$ (9,508)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	16,455	12,961
Amortization of deferred loan costs and debt discount	1,668	157
Provision for doubtful accounts	2,422	1,774
Foreign currency loss	412	334
Deferred income taxes	(1,644)	(4,835)
Gain on revaluation of contingent consideration	0	(1,174)
Loss (gain) on asset disposal	44	(976)
Gain on convertible debt embedded derivative	(4,547)	0
Non-cash compensation cost	2,420	1,747
Other, net	(1,025)	(497)
(Increase) decrease:
Receivables	11,674	(6,919)
Inventory	(1,904)	(795)
Prepaid expenses and other current assets	(4,381)	1,746
Increase (decrease):
Accounts payable	(6,922)	(7,210)
Other accrued liabilities	506	12,681
Income taxes	4,818	(2,036)
Net cash provided by (used in) operating activities	2,151	(2,550)
Cash flows from investing activities:
Capital expenditures	(5,487)	(10,718)
Proceeds from disposal of assets	18	533
Other	(436)	(570)
Net cash used in investing activities	(5,905)	(10,755)
Cash flows from financing activities:
Net payments under revolving credit agreement	(2,630)	(5,100)
Payments under term loan	0	(5,000)
Contingent consideration payments	(668)	0
Debt issuance costs on Credit Facility	(855)	(10)
Issuance of common stock from share-based payment arrangements	0	449
Payments related to withholding tax for share-based payment arrangements	(225)	(249)
Net cash used in financing activities	(4,378)	(9,910)
Effect of exchange rate changes on cash	(237)	739
Net decrease in cash or cash equivalents	(8,369)	(22,476)
Cash and cash equivalents at beginning of period	26,552	46,216
Cash and cash equivalents at end of period	$ 18,183	$ 23,740