Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (2,022)	$ (2,422)
Adjustments to reconcile net loss to cash provided (used) by operating activities:
Deferred income taxes	(1,258)	(85)
Depreciation	2,944	3,282
Amortization	1,785	1,759
Equity in loss of nonconsolidated investments	3	200
Loss on sales and disposals of property, plant, and equipment	3	109
Stock-based compensation	1,082	167
Change in operating assets and liabilities
Accounts receivable	10	(9,901)
Inventories	(2,882)	940
Other current assets	(2,775)	(1,669)
Prepaid income tax	(277)	2,750
Other noncurrent assets	230	236
Accounts payable	10,759	18,472
Deferred revenue	82	(751)
Accrued payroll and employee benefits	(5,615)	(1,505)
Other current liabilities	576	(805)
Other liabilities	(54)	(29)
Net cash provided by operating activities	2,591	10,748
CASH FLOWS FROM INVESTING ACTIVITIES:
Proceeds from the sale of property, plant, and equipment	9	138
Capital expenditures on property, plant, and equipment	(723)	(3,453)
Net cash used by investing activities	(714)	(3,315)
CASH FLOWS FROM FINANCING ACTIVITIES:
Repayments of debt	(60,639)	(28,431)
Proceeds from debt	33,076	24,131
Treasury stock acquisitions	(310)	(97)
Net cash used by financing activities	(27,873)	(4,397)
Effect of exchange rate changes on cash and cash equivalents	(698)	369
Net (decrease) increase in cash and cash equivalents	(26,694)	3,405
Cash and cash equivalents at beginning of period	37,678	30,363
Cash and cash equivalents at end of period	10,984	33,768
Supplemental disclosure of cash flow information:
Interest paid	964	1,840
Income taxes paid (received)	994	(2,105)
Capital expenditures funded through financing agreements	$ 0	$ 0