Quarterly Financial Information - Quarterly Financial Information (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 |
Dec. 31, 2014 |
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| Quarterly Financial Information Disclosure [Abstract] | |||||||||||
| Net sales | $ 8,615 | $ 8,989 | $ 12,126 | $ 9,410 | $ 10,192 | $ 12,179 | $ 10,945 | $ 14,517 | $ 39,140 | $ 47,833 | $ 48,144 |
| Gross profit | 1,374 | 884 | 1,157 | 1,178 | 1,256 | 2,001 | 1,608 | 2,554 | 4,593 | 7,419 | 8,253 |
| Net income (loss) | $ 48 | $ (945) | $ (1,035) | $ (903) | $ (959) | $ (138) | $ (678) | $ 532 | $ (2,835) | $ (1,243) | $ 261 |
| Basic and diluted net income (loss) per share | $ 0.00 | $ (0.07) | $ (0.07) | $ (0.06) | $ (0.07) | $ (0.01) | $ (0.05) | $ 0.04 | |||