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Segment Reporting - 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, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2013 | Dec. 31, 2012
Quarterly information for the applicable time periods |  |  |  |  |  |  |  |  |  |  |
Net sales | $ 18,146 | $ 17,585 | $ 15,169 | $ 14,430 | $ 15,035 | $ 11,725 | $ 12,872 | $ 14,432 | $ 65,330 |  | $ 54,065
Gross profit | 3,572 | 2,867 | 2,396 | 2,980 | 2,490 | 1,689 | 2,172 | 1,772 | 11,815 |  | 8,123
Net income (loss) | $ 592 | $ 901 | $ 1,063 | $ 1,653 | $ 487 | $ 500 | $ 761 | $ 334 | $ 4,209 | [1] | $ 2,084
Earnings (loss) per common share: |  |  |  |  |  |  |  |  |  |  |
Basic | $ 0.07 | $ 0.11 | $ 0.13 | $ 0.21 | $ 0.06 | $ 0.06 | $ 0.10 | $ 0.04 | $ 0.53 |  | $ 0.26
[1] | Net of preferred dividends of $225 and $342 in 2012 and 2013 respectively.

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