Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash flows from operating activities:
Net income (loss)	$ 67	$ (11,978)
Loss from discontinued operations, net of tax	0	(11,235)
Income (loss) from continuing operations	67	(743)
Adjustments to reconcile income (loss) from continuing operations to net cash used in operating activities:
Depreciation and amortization	3,002	3,032
Amortization of deferred financing costs	96	130
Provision for excess and obsolete inventory	1,175	89
Loss on sale of assets	57	198
Stock compensation expense	1,963	3,011
Deferred income tax benefit	(7,662)	(7,403)
Reduction in tax benefit related to share-based awards	3	66
Changes in current assets and liabilities:
Accounts receivable, net	668	(15,788)
Inventories	(7,548)	(6,462)
Income taxes receivable	(1)	332
Other current assets	350	13,923
Accounts payable	1,132	5,671
Accrued liabilities	(5,018)	1,265
Income taxes payable	0	97
Interest payable	(37)	25
Net cash used in operating activities	(11,753)	(2,557)
Cash flows from investing activities:
Capital expenditures	(1,787)	(1,877)
Proceeds from sale of assets	80	158
Purchase of patents and other intangible assets	(137)	(84)
Net cash used in investing activities	(1,844)	(1,803)
Cash flows from financing activities:
Repayments of indebtedness	0	(750)
Borrowings on revolving credit facility	76,266	98,863
Repayments on revolving credit facility	(64,475)	(96,826)
Debt issuance costs	(8)	(106)
Purchase of treasury stock related to share-based awards	(3)	(102)
Proceeds from sale of common stock	146	251
Proceeds from exercise of stock options	0	7
Net cash provided by financing activities	11,926	1,337
Discontinued operations:
Net cash used in operating activities	0	(353)
Net cash provided by investing activities	0	353
Net cash flows provided by discontinued operations	0	0
Effect of changes in exchange rates on cash and cash equivalents	(48)	26
Net decrease in cash and cash equivalents	(1,719)	(2,997)
Cash and cash equivalents at the beginning of period	4,584	4,823
Cash and cash equivalents at the end of period	$ 2,865	$ 1,826