Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Operating activities:
Net Income (loss)	$ 29,688	$ (1,629)	$ 297
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	(6,770)	(8,066)	(8,543)
Stock based compensation	(3,106)	(2,469)	(2,093)
Loss (gain) on disposal of property and equipment	(5,422)	0	0
Increase (Decrease) in Deferred Income Taxes	(21,229)	31	0
Environmental Remediation Expense	0	0	931
Changes in operating assets and liabilities:
Accounts receivable	(5,275)	(3,252)	3,285
Inventories	(1,713)	2,229	(116)
Prepaid expenses and other assets	(1,226)	(45)	418
Accounts payable and other liabilities	(1,846)	(573)	6,133
Other	525	194	215
Net cash provided by operating activities	7,070	8,636	9,533
Investing activities:
Purchases of property, plant and equipment	(1,256)	(3,112)	(2,342)
Payments to Acquire Businesses, Gross	32,286	6,030	441
Proceeds from sale of property	6,177	0	3
Net cash used in investing activities	(27,365)	(9,142)	(2,780)
Financing activities:
Net borrowings on revolving line of credit	13,595	(84)	925
Proceeds from Stock Options Exercised	20	0	50
Payments for Repurchase of Common Stock	(20)	(176)	(248)
Payments of Merger Related Costs, Financing Activities	(80)	0	0
Net cash provided by (used in) financing activities	13,515	(260)	727
Discontinued operations:
Effect of Exchange Rate on Cash and Cash Equivalents	775	422	(922)
Increase (decrease) in cash and cash equivalents	(6,005)	(344)	6,558
Cash and cash equivalents at beginning of year	10,421	10,765	4,207
Cash and cash equivalents at end of year	$ 4,416	$ 10,421	$ 10,765