v2.4.0.8
Quarterly Financial Data (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
Dec. 31, 2011
Quarterly Financial Data [Line Items]                      
Net sales $ 19,875 $ 33,101 $ 35,565 $ 25,397 $ 20,674 $ 34,484 $ 34,115 $ 24,248 $ 113,938 $ 113,521 $ 108,195
Gross profit 2,703 6,099 7,138 4,202 2,596 5,688 5,609 3,409 20,142 17,302 18,029
Net earnings (loss) $ (1,282) $ 487 $ 1,097 $ (939) $ (1,480) $ 307 $ 504 $ (1,345) $ (637) $ (2,014) $ (886)
Net earnings (loss) per share - diluted $ (0.27) $ 0.10 $ 0.23 $ (0.20) $ (0.32) $ 0.07 $ 0.11 $ (0.30) $ (0.14) $ (0.44) $ (0.20)