INCOME TAXES - Summary of reconciliation of income tax (benefit) provision (Details 1) - USD ($) $ 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 |
|
| Income Tax Disclosure [Abstract] | |||||||||||
| Income tax expense (benefit) computed at U.S. corporate tax rate of 34% | $ (8,384) | $ (3,147) | $ 903 | ||||||||
| Adjustments attributable to: | |||||||||||
| Valuation allowance | 4,486 | 13,053 | 1,077 | ||||||||
| Income tax payable adjustments | 210 | ||||||||||
| State income tax | (50) | 13 | 24 | ||||||||
| Reserve for uncertain tax positions | (34) | (36) | (57) | ||||||||
| Goodwill impairment | 3,283 | ||||||||||
| Nondeductible expenses | 8 | 19 | (1,575) | ||||||||
| Other | 141 | 47 | |||||||||
| Income tax benefit | $ (83) | $ (87) | $ (234) | $ 64 | $ (257) | $ 10,404 | $ 141 | $ (386) | $ (340) | $ 9,902 | $ 419 |