UNAUDITED SELECTED QUARTERLY DATA - Summarize selected unaudited financial data for each quarter of years (Details) - 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 |
|
| Quarterly Financial Information Disclosure [Abstract] | |||||||||||
| Net revenues | $ 17,577 | $ 17,412 | $ 17,606 | $ 18,050 | $ 18,785 | $ 23,334 | $ 25,653 | $ 21,678 | $ 70,645 | $ 89,450 | $ 93,869 |
| Gross profit | 7,829 | 8,475 | 8,579 | 9,231 | 9,909 | 7,286 | 11,140 | 10,106 | 34,114 | 38,441 | 43,264 |
| Operating (loss) income | (10,771) | (2,197) | (8,086) | (1,748) | (2,513) | (5,819) | 583 | (834) | (22,802) | (8,583) | 2,115 |
| (Loss) income before income taxes | (11,241) | (2,633) | (8,524) | (2,262) | (2,683) | (5,976) | 410 | (1,006) | (24,660) | (9,255) | 2,655 |
| Income tax (benefit) expense | (83) | (87) | (234) | 64 | (257) | 10,404 | 141 | (386) | (340) | 9,902 | 419 |
| Net (loss) income | $ (11,158) | $ (2,546) | $ (8,290) | $ (2,326) | $ (2,426) | $ (16,380) | $ 269 | $ (620) | $ (24,320) | $ (19,157) | $ 1,744 |
| Basic (loss) earnings per share | $ (0.57) | $ (0.13) | $ (0.43) | $ (0.12) | $ (0.13) | $ (0.86) | $ 0.01 | $ (0.03) | $ (1.25) | $ (1.00) | $ 0.09 |
| Diluted (loss) earnings per share | $ (0.57) | $ (0.13) | $ (0.43) | $ (0.12) | $ (0.13) | $ (0.86) | $ 0.01 | $ (0.03) | $ (1.25) | $ (1.00) | $ 0.09 |