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Quarterly Results for Continuing Operations - Quarterly Information for the Applicable Time Periods (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015
Quarterly information for the applicable time periods
Net sales	$ 9,397	$ 8,673	$ 11,444	$ 8,298	$ 7,690	$ 13,780	$ 12,302	$ 15,311	$ 37,812	$ 49,083
Gross Profit (Loss)	150	(451)	1,226	91	(298)	2,561	2,044	2,283	1,016	6,590
Net income (loss)	$ (1,704)	$ (2,624)	$ 151	$ (2,883)	$ (3,618)	$ 204	$ 547	$ 274	$ (7,060)	$ (2,593)
Earnings (loss) per share:
Basic	$ (0.21)	$ (0.33)	$ 0.01	$ (0.36)	$ (0.45)	$ 0.01	$ 0.06	$ 0.02	$ (0.89)	$ (0.36)

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Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity.

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The amount of net income (loss) from continuing operations per each share of common stock or unit outstanding during the reporting period.

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