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Changes in Accounting Policies (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017	Dec. 31, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cash and Cash Equivalents, at Carrying Value	$ 0	$ 27,540,000	$ 0	$ 27,540,000	$ 26,780,000	$ 28,285,000
Sales Revenue, Goods, Net	62,305,000	37,593,000	187,243,000	110,723,000
Contracts Revenue	2,371,000	901,000	9,081,000	11,885,000
Total net sales	64,676,000	38,494,000	196,324,000	122,608,000
Cost of Goods Sold	59,814,000	32,742,000	175,679,000	103,037,000
Gross margin	4,862,000	5,752,000	20,645,000	19,571,000
Selling, General and Administrative Expense	6,349,000	4,358,000	19,587,000	12,450,000
Operating Income (Loss)	(1,487,000)	1,394,000	1,058,000	7,121,000
Interest Expense	632,000	62,000	1,705,000	191,000
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	(12,000)	(12,000)	(36,000)	(36,000)
Other Nonoperating Income (Expense)	620,000	50,000	1,669,000	155,000
Income before income taxes	(2,107,000)	1,344,000	(611,000)	6,966,000
Income Tax Expense (Benefit)	(304,000)	489,000	228,000	2,262,000
Net income	$ (1,803,000)	$ 855,000	$ (839,000)	$ 4,704,000
Earnings Per Share, Basic	$ (0.23)	$ 0.11	$ (0.11)	$ 0.61
Earnings Per Share, Diluted	$ (0.23)	$ 0.11	$ (0.11)	$ 0.61
Accounts Receivable, Net, Current	$ 38,666,000		$ 38,666,000		19,846,000
Inventory, Net	22,648,000		22,648,000		13,459,000
Prepaid Expense and Other Assets, Current	8,123,000		8,123,000		4,870,000
Assets, Current	69,437,000		69,437,000		64,955,000
Property, Plant and Equipment, Net	80,822,000		80,822,000		68,631,000
Goodwill	22,957,000		22,957,000		2,403,000
Intangible Assets, Net (Excluding Goodwill)	16,666,000		16,666,000		513,000
Other Assets, Noncurrent	2,184,000		2,184,000		2,076,000
Assets	192,066,000		192,066,000		138,578,000
Liabilities, Current [Abstract]
Revolving line of credit	0		0
Long-term Debt, Current Maturities	3,230,000		3,230,000		3,000,000
Accounts payable	29,066,000		29,066,000		13,850,000
Employee-related Liabilities, Current	5,071,000		5,071,000		3,524,000
Other Liabilities, Current	4,940,000		4,940,000		4,212,000
Liabilities, Current	42,307,000		42,307,000		24,586,000
Long-term debt	38,591,000		38,591,000		3,750,000
Deferred Tax Liabilities, Net	395,000		395,000		395,000
Postemployment Benefits Liability, Noncurrent	7,924,000		7,924,000		7,954,000
Liabilities	89,217,000		89,217,000		36,685,000
Commitments and Contingencies	0		0		0
Stockholders' Equity Attributable to Parent [Abstract]
Preferred Stock, Value, Issued	0		0		0
Common Stock, Value, Issued	78,000		78,000		77,000
Additional Paid in Capital, Common Stock	32,693,000		32,693,000		31,465,000
Accumulated Other Comprehensive Income (Loss), Net of Tax	2,609,000	$ 2,666,000	2,609,000	$ 2,666,000	2,070,000	$ 2,414,000
Treasury Stock, Value	(28,403,000)		(28,403,000)		(28,153,000)
Retained Earnings (Accumulated Deficit)	95,872,000		95,872,000		96,434,000
Stockholders' Equity Attributable to Parent	102,849,000		102,849,000		101,893,000
Liabilities and Equity	192,066,000		192,066,000		138,578,000
Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]
Depreciation, Depletion and Amortization			7,105,000	4,814,000
Gain (Loss) on Disposition of Assets			6,000	0
Share-based Compensation			1,228,000	1,061,000
Foreign Currency Transaction Gain (Loss), Unrealized			14,000	29,000
Increase (Decrease) in Operating Capital [Abstract]
Increase (Decrease) in Accounts Receivable			(12,528,000)	(4,742,000)
Increase (Decrease) in Inventories			(2,265,000)	(1,882,000)
Increase (Decrease) in Prepaid Expense and Other Assets			3,060,000	(1,544,000)
Increase (Decrease) in Accounts Payable			13,272,000	3,062,000
Accrued and other liabilities			(2,255,000)	(684,000)
Post retirement benefits liability			(274,000)	(289,000)
Net Cash Provided by (Used in) Operating Activities			6,524,000	4,529,000
Net Cash Provided by (Used in) Investing Activities [Abstract]
Payments to Acquire Property, Plant, and Equipment			(4,761,000)	(2,259,000)
Business Combination, Consideration Transferred			(62,457,000)	0
Net Cash Provided by (Used in) Investing Activities			(67,218,000)	(2,259,000)
Net Cash Provided by (Used in) Financing Activities [Abstract]
Repayments of Lines of Credit			(67,594,000)	0
Proceeds from Lines of Credit			67,594,000	0
Proceeds from (Repayments of) Debt			45,000,000	0
Repayments of Short-term Debt			(9,281,000)	(2,250,000)
Payments of Loan Costs			(763,000)	0
Payments of Dividends			792,000
Payments of Dividends			792,000	393,000
Payments related to purchase of treasury stock			(250,000)	(372,000)
Net Cash Provided by (Used in) Financing Activities			33,914,000	(3,015,000)
Cash and Cash Equivalents, Period Increase (Decrease)			(26,780,000)	(745,000)
Interest Paid [Abstract]
Interest Paid			1,612,000	193,000
Income Taxes Paid, Net			848,000	2,394,000
Other Noncash Investing and Financing Items [Abstract]
Capital Expenditures Incurred but Not yet Paid			344,000	$ 343,000
Scenario, Previously Reported [Member]
Stockholders' Equity Attributable to Parent [Abstract]
Stockholders' Equity Attributable to Parent					101,893,000
Without adoption of Topic 606 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cash and Cash Equivalents, at Carrying Value	0		0		26,780,000
Sales Revenue, Goods, Net	62,305,000		187,243,000
Contracts Revenue	3,859,000		12,931,000
Total net sales	66,164,000		200,174,000
Cost of Goods Sold	61,059,000		178,685,000
Gross margin	5,105,000		21,489,000
Selling, General and Administrative Expense	6,349,000		19,587,000
Operating Income (Loss)	(1,244,000)		1,902,000
Interest Expense	632,000		1,705,000
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	(12,000)		(36,000)
Other Nonoperating Income (Expense)	620,000		1,669,000
Income before income taxes	(1,864,000)		233,000
Income Tax Expense (Benefit)	(253,000)		405,000
Net income	$ (1,611,000)		$ (172,000)
Earnings Per Share, Basic	$ (0.21)		$ (0.02)
Earnings Per Share, Diluted	$ (0.21)		$ (0.02)
Accounts Receivable, Net, Current	$ 38,666,000		$ 38,666,000
Inventory, Net	22,648,000		22,648,000
Prepaid Expense and Other Assets, Current	7,721,000		7,721,000
Assets, Current	69,035,000		69,035,000
Property, Plant and Equipment, Net	80,822,000		80,822,000
Goodwill	22,957,000		22,957,000
Intangible Assets, Net (Excluding Goodwill)	16,666,000		16,666,000
Other Assets, Noncurrent	2,184,000		2,184,000
Assets	191,664,000		191,664,000
Liabilities, Current [Abstract]
Revolving line of credit	0		0
Long-term Debt, Current Maturities	3,230,000		3,230,000
Accounts payable	29,066,000		29,066,000
Employee-related Liabilities, Current	5,071,000		5,071,000
Other Liabilities, Current	4,940,000		4,940,000
Liabilities, Current	42,307,000		42,307,000
Long-term debt	38,591,000		38,591,000
Deferred Tax Liabilities, Net	395,000		395,000
Postemployment Benefits Liability, Noncurrent	7,924,000		7,924,000
Liabilities	89,217,000		89,217,000
Commitments and Contingencies	0		0
Stockholders' Equity Attributable to Parent [Abstract]
Preferred Stock, Value, Issued	0		0
Common Stock, Value, Issued	78,000		78,000
Additional Paid in Capital, Common Stock	32,693,000		32,693,000
Accumulated Other Comprehensive Income (Loss), Net of Tax	2,609,000		2,609,000
Treasury Stock, Value	(28,403,000)		(28,403,000)
Retained Earnings (Accumulated Deficit)	95,470,000		95,470,000
Stockholders' Equity Attributable to Parent	102,447,000		102,447,000
Liabilities and Equity	191,664,000		191,664,000
Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]
Depreciation, Depletion and Amortization			7,105,000
Gain (Loss) on Disposition of Assets			6,000
Share-based Compensation			1,228,000
Foreign Currency Transaction Gain (Loss), Unrealized			14,000
Increase (Decrease) in Operating Capital [Abstract]
Increase (Decrease) in Accounts Receivable			(12,528,000)
Increase (Decrease) in Inventories			(2,265,000)
Increase (Decrease) in Prepaid Expense and Other Assets			2,393,000
Increase (Decrease) in Accounts Payable			13,272,000
Accrued and other liabilities			(2,255,000)
Post retirement benefits liability			(274,000)
Net Cash Provided by (Used in) Operating Activities			6,524,000
Net Cash Provided by (Used in) Investing Activities [Abstract]
Payments to Acquire Property, Plant, and Equipment			(4,761,000)
Business Combination, Consideration Transferred			(62,457,000)
Net Cash Provided by (Used in) Investing Activities			(67,218,000)
Net Cash Provided by (Used in) Financing Activities [Abstract]
Repayments of Lines of Credit			(67,594,000)
Proceeds from Lines of Credit			67,594,000
Proceeds from (Repayments of) Debt			45,000,000
Repayments of Short-term Debt			(9,281,000)
Payments of Loan Costs			(763,000)
Payments of Dividends			792,000
Payments related to purchase of treasury stock			(250,000)
Net Cash Provided by (Used in) Financing Activities			33,914,000
Cash and Cash Equivalents, Period Increase (Decrease)			(26,780,000)
Interest Paid [Abstract]
Interest Paid			1,612,000
Income Taxes Paid, Net			848,000
Other Noncash Investing and Financing Items [Abstract]
Capital Expenditures Incurred but Not yet Paid			344,000
Accounting Standards Update 2014-09 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cash and Cash Equivalents, at Carrying Value	0		0		0
Sales Revenue, Goods, Net			0
Contracts Revenue	1,488,000		3,850,000
Total net sales	1,488,000		3,850,000
Cost of Goods Sold	1,245,000		3,006,000
Gross margin	243,000		844,000
Selling, General and Administrative Expense			0
Operating Income (Loss)	243,000		844,000
Interest Expense			0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)			0
Other Nonoperating Income (Expense)	0		0
Income before income taxes	243,000		844,000
Income Tax Expense (Benefit)	51,000		177,000
Net income	$ 192,000		$ 667,000
Earnings Per Share, Basic	$ 0.00		$ 0.00
Earnings Per Share, Diluted	$ 0.00		$ 0.00
Accounts Receivable, Net, Current	$ 0		$ 0
Inventory, Net	0		0
Prepaid Expense and Other Assets, Current	(402,000)		(402,000)
Assets, Current	(402,000)		(402,000)
Property, Plant and Equipment, Net	0		0
Goodwill	0		0
Intangible Assets, Net (Excluding Goodwill)	0		0
Other Assets, Noncurrent	0		0
Assets	(402,000)		(402,000)
Liabilities, Current [Abstract]
Revolving line of credit	0		0
Long-term Debt, Current Maturities	0		0
Accounts payable	0		0
Employee-related Liabilities, Current	0		0
Other Liabilities, Current	0		0
Liabilities, Current	0		0
Long-term debt	0		0
Deferred Tax Liabilities, Net	0		0
Postemployment Benefits Liability, Noncurrent	0		0
Liabilities	0		0
Stockholders' Equity Attributable to Parent [Abstract]
Preferred Stock, Value, Issued	0		0
Common Stock, Value, Issued	0		0
Additional Paid in Capital, Common Stock	0		0
Accumulated Other Comprehensive Income (Loss), Net of Tax	0		0
Treasury Stock, Value	0		0
Retained Earnings (Accumulated Deficit)	(402,000)		(402,000)
Stockholders' Equity Attributable to Parent	(402,000)		(402,000)		102,962,000
Liabilities and Equity	(402,000)		(402,000)
Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]
Depreciation, Depletion and Amortization			0
Gain (Loss) on Disposition of Assets			0
Share-based Compensation			0
Foreign Currency Transaction Gain (Loss), Unrealized			0
Increase (Decrease) in Operating Capital [Abstract]
Increase (Decrease) in Accounts Receivable			0
Increase (Decrease) in Inventories			0
Increase (Decrease) in Prepaid Expense and Other Assets			(667,000)
Increase (Decrease) in Accounts Payable			0
Accrued and other liabilities			0
Post retirement benefits liability			0
Net Cash Provided by (Used in) Operating Activities			0
Net Cash Provided by (Used in) Investing Activities [Abstract]
Payments to Acquire Property, Plant, and Equipment			0
Business Combination, Consideration Transferred			0
Net Cash Provided by (Used in) Investing Activities			0
Net Cash Provided by (Used in) Financing Activities [Abstract]
Repayments of Lines of Credit			0
Proceeds from Lines of Credit			0
Proceeds from (Repayments of) Debt			0
Repayments of Short-term Debt			0
Payments of Loan Costs			0
Payments related to purchase of treasury stock			0
Net Cash Provided by (Used in) Financing Activities			0
Cash and Cash Equivalents, Period Increase (Decrease)			0
Interest Paid [Abstract]
Interest Paid			0
Income Taxes Paid, Net			0
Other Noncash Investing and Financing Items [Abstract]
Capital Expenditures Incurred but Not yet Paid			0
Retained Earnings [Member]
Stockholders' Equity Attributable to Parent [Abstract]
Stockholders' Equity Attributable to Parent	$ 95,872,000		95,872,000
Net Cash Provided by (Used in) Financing Activities [Abstract]
Payments of Dividends			792,000
Retained Earnings [Member] | Scenario, Previously Reported [Member]
Stockholders' Equity Attributable to Parent [Abstract]
Stockholders' Equity Attributable to Parent					96,434,000
Retained Earnings [Member] | Without adoption of Topic 606 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net income			$ (172,000)
Retained Earnings [Member] | Accounting Standards Update 2014-09 [Member]
Stockholders' Equity Attributable to Parent [Abstract]
Stockholders' Equity Attributable to Parent					$ 97,503,000

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Amount of cash outflow for payment of an obligation from a lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

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