CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$ (6,505,000)	$ (23,971,000)	$ 2,567,000
Adjustments to reconcile net income to net cash provided by operating activities:
Loss (income) from discontinued operations, net of tax	0	0	77,000
Gain on sale of discontinued operations, net of tax	0	0	(718,000)
Depreciation (including capital lease amortization)	6,756,000	6,244,000	7,051,000
Amortization of purchased intangible assets	4,011,000	4,033,000	6,103,000
Amortization and write-off of deferred debt issuance costs	156,000	752,000	102,000
Stock-based compensation	2,326,000	2,826,000	3,588,000
Excess tax benefit from stock-based compensation	0	0	(156,000)
Deferred income tax benefit	(284,000)	(725,000)	(255,000)
(Gain) loss on disposal of property, plant and equipment	455,000	(23,000)	12,000
Restructuring and asset impairment expenses	1,202,000	4,063,000	6,781,000
Goodwill impairment charge	0	11,464,000	0
Accrued anti-dumping duties	176,000	6,374,000	0
Other	0	23,000	0
Change in:
Accounts receivable, net	2,679,000	(2,394,000)	(427,000)
Inventory, net	6,829,000	1,386,000	(3,459,000)
Prepaid expenses and other	1,002,000	(3,570,000)	(3,004,000)
Accounts payable	(1,338,000)	758,000	(932,000)
Customer advances	223,000	(857,000)	2,782,000
Accrued expenses and other liabilities	510,000	(4,765,000)	2,962,000
Net cash flows provided by continuing operations	18,198,000	1,618,000	23,074,000
Net cash flows provided by discontinued operations	0	0	239,000
Net cash provided by operating activities	18,198,000	1,618,000	23,313,000
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisition of property, plant and equipment	(5,719,000)	(5,433,000)	(21,403,000)
Net proceeds on sale of AMK	0	0	6,830,000
Proceeds on sale of property, plant and equipment	26,000	0	0
Change in other non-current assets	(9,000)	107,000	1,310,000
Net cash flows used in continuing operations	(5,702,000)	(5,326,000)	(13,263,000)
Net cash flows used in discontinued operations	0	0	(120,000)
Net cash used in investing activities	(5,702,000)	(5,326,000)	(13,383,000)
CASH FLOWS FROM FINANCING ACTIVITIES:
Borrowings (repayments) on bank lines of credit, net	(11,250,000)	5,003,000	(6,069,000)
Payment on loans with former owners of LRI	0	0	(50,000)
Payment on capital lease obligations	(3,000)	(5,000)	(24,000)
Payment of dividends	(1,150,000)	(2,260,000)	(2,226,000)
Payment of deferred debt issuance costs	0	(1,222,000)	0
Net proceeds from issuance of common stock to employees and directors	322,000	272,000	359,000
Treasury stock purchases	(26,000)	0	0
Excess tax benefit from stock-based compensation	0	0	156,000
Net cash provided by (used in) financing activities	(12,107,000)	1,788,000	(7,854,000)
EFFECTS OF EXCHANGE RATES ON CASH	(261,000)	(1,189,000)	(3,274,000)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	128,000	(3,109,000)	(1,198,000)
CASH AND CASH EQUIVALENTS, beginning of the period	6,291,000	9,400,000	10,598,000
CASH AND CASH EQUIVALENTS, end of the period	6,419,000	6,291,000	9,400,000
Cash paid during the period for -
Interest	575,000	624,000	514,000
Income taxes, net	$ 354,000	$ 2,491,000	$ 3,586,000