Annual report pursuant to Section 13 and 15(d)

Quarterly Information (Unaudited) - Schedule of Quarterly Financial Information (Details)

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Quarterly Information (Unaudited) - Schedule of Quarterly Financial Information (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Quarterly Financial Information Disclosure [Abstract]                      
Net sales $ 8,163 $ 4,390 $ 2,191 $ 5,860 $ 8,972 $ 5,130 $ 1,797 $ 6,171 $ 20,604 $ 22,070 $ 25,032
Gross profit 4,788 2,719 1,008 3,662 5,896 3,510 792 3,980 12,178 14,179 16,671
Net income (loss) $ (1,256) $ 602 $ (1,566) $ (1,380) $ (676) $ (3,216) $ (3,138) $ (804) $ (3,600) $ (7,834) $ 405
Basic and diluted loss per share $ (0.07) $ 0.04 $ (0.10) $ (0.09) $ (0.05) $ (0.18) $ (0.19) $ (0.05)