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CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Statement [Abstract]
Net sales	$ 103,846us-gaap_SalesRevenueNet	$ 92,045us-gaap_SalesRevenueNet	$ 83,196us-gaap_SalesRevenueNet
Cost of goods sold	71,598us-gaap_CostOfGoodsSold	64,471us-gaap_CostOfGoodsSold	58,869us-gaap_CostOfGoodsSold
Gross profit	32,248us-gaap_GrossProfit	27,574us-gaap_GrossProfit	24,327us-gaap_GrossProfit
Selling, general and administrative expense	18,641us-gaap_SellingGeneralAndAdministrativeExpense	18,246us-gaap_SellingGeneralAndAdministrativeExpense	17,747us-gaap_SellingGeneralAndAdministrativeExpense
Write-down and loss on disposal of assets held for sale			1,162us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf
Operating income	13,607us-gaap_OperatingIncomeLoss	9,328us-gaap_OperatingIncomeLoss	5,418us-gaap_OperatingIncomeLoss
Other non-operating income, net	66us-gaap_OtherNonoperatingIncomeExpense	40us-gaap_OtherNonoperatingIncomeExpense
Interest expense		(127)us-gaap_InterestExpense	(479)us-gaap_InterestExpense
Income from continuing operations before income taxes	13,673us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	9,241us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	4,939us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Provision for income taxes	5,012us-gaap_IncomeTaxExpenseBenefit	3,226us-gaap_IncomeTaxExpenseBenefit	1,415us-gaap_IncomeTaxExpenseBenefit
Income from continuing operations	8,661us-gaap_IncomeLossFromContinuingOperations	6,015us-gaap_IncomeLossFromContinuingOperations	3,524us-gaap_IncomeLossFromContinuingOperations
Discontinued operations, net of tax:
Income from operations			3,800us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity
Gain on disposal of discontinued operations			27,637us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax
Net income	$ 8,661us-gaap_NetIncomeLoss	$ 6,015us-gaap_NetIncomeLoss	$ 34,961us-gaap_NetIncomeLoss
Basic and diluted earnings per common share:
Continuing operations	$ 0.70us-gaap_IncomeLossFromContinuingOperationsPerBasicAndDilutedShare	$ 0.49us-gaap_IncomeLossFromContinuingOperationsPerBasicAndDilutedShare	$ 0.28us-gaap_IncomeLossFromContinuingOperationsPerBasicAndDilutedShare
Discontinued operations:
Income from operations			$ 0.31us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicAndDilutedShare
Gain on disposal of discontinued operations			$ 2.23us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTaxPerBasicAndDilutedShare
Net income	$ 0.70us-gaap_EarningsPerShareBasicAndDiluted	$ 0.49us-gaap_EarningsPerShareBasicAndDiluted	$ 2.82us-gaap_EarningsPerShareBasicAndDiluted
Cash dividends per share	$ 0.20us-gaap_CommonStockDividendsPerShareCashPaid	$ 0.275us-gaap_CommonStockDividendsPerShareCashPaid	$ 0.50us-gaap_CommonStockDividendsPerShareCashPaid
Basic and diluted weighted average shares outstanding	12,401us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted	12,395us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted	12,390us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted

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