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Quarterly Results for Continuing Operations - Quarterly Information for the Applicable Time Periods (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Quarterly information for the applicable time periods
Net sales	$ 13,693us-gaap_SalesRevenueNet	$ 14,283us-gaap_SalesRevenueNet	$ 13,430us-gaap_SalesRevenueNet	$ 15,848us-gaap_SalesRevenueNet	$ 16,496us-gaap_SalesRevenueNet	$ 16,236us-gaap_SalesRevenueNet	$ 13,499us-gaap_SalesRevenueNet	$ 13,008us-gaap_SalesRevenueNet	$ 57,254us-gaap_SalesRevenueNet	$ 59,239us-gaap_SalesRevenueNet
Gross Profit	37us-gaap_GrossProfit	495us-gaap_GrossProfit	2,028us-gaap_GrossProfit	2,435us-gaap_GrossProfit	3,554us-gaap_GrossProfit	2,759us-gaap_GrossProfit	2,089us-gaap_GrossProfit	2,765us-gaap_GrossProfit	4,995us-gaap_GrossProfit	11,167us-gaap_GrossProfit
Net income (loss)	$ (1,982)us-gaap_IncomeLossFromContinuingOperations	$ (1,982)us-gaap_IncomeLossFromContinuingOperations	$ 1,062us-gaap_IncomeLossFromContinuingOperations	$ 848us-gaap_IncomeLossFromContinuingOperations	$ 1,027us-gaap_IncomeLossFromContinuingOperations	$ 1,202us-gaap_IncomeLossFromContinuingOperations	$ 1,208us-gaap_IncomeLossFromContinuingOperations	$ 1,813us-gaap_IncomeLossFromContinuingOperations	$ (2,054)us-gaap_IncomeLossFromContinuingOperations	$ 5,260us-gaap_IncomeLossFromContinuingOperations
Earnings (loss) per share:
Basic	$ (0.25)us-gaap_IncomeLossFromContinuingOperationsPerBasicShare	$ (0.25)us-gaap_IncomeLossFromContinuingOperationsPerBasicShare	$ 0.12us-gaap_IncomeLossFromContinuingOperationsPerBasicShare	$ 0.09us-gaap_IncomeLossFromContinuingOperationsPerBasicShare	$ 0.12us-gaap_IncomeLossFromContinuingOperationsPerBasicShare	$ 0.14us-gaap_IncomeLossFromContinuingOperationsPerBasicShare	$ 0.14us-gaap_IncomeLossFromContinuingOperationsPerBasicShare	$ 0.22us-gaap_IncomeLossFromContinuingOperationsPerBasicShare	$ (0.29)us-gaap_IncomeLossFromContinuingOperationsPerBasicShare	$ 0.62us-gaap_IncomeLossFromContinuingOperationsPerBasicShare

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