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EARNINGS PER SHARE (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Numerators:                      
Net (loss) from continuing operations                 $ (9,494) $ (13,682) $ (11,550)
Effective of dilutive securities - Derivative liability - warrants                 0 0 (64)
Numerator for dilutive (loss) per share - continuing operations                 (9,494) (13,682) (11,614)
Net income from discontinued operations, net of tax                 73,503 8,620 7,600
Numerator for dilutive income per share - discontinued operations                 73,503 8,620 7,536
Effect of dilutive securities - Derivative liability warrants $ (3,327) $ (438) $ (2,938) $ (2,791) $ (2,973) $ (2,944) $ (3,867) $ (3,898) 64,009 (5,062) (3,950)
Derivative liability warrants                 0 (183) (64)
Numerator for full dilutive (loss) income per share - all                 $ 64,009 $ (5,245) $ (4,014)
Denominator                      
Weighted average shares used to compute basic income (loss) (in shares)                 33,185 31,420 27,433
Denominator for dilutive income (loss) per common share - continuing operations (in shares)                 33,185 31,420 27,449
Effect of dilutive securities: (in shares)                 0 0 16
Denominator for dilutive income (loss) per common share (in shares)                 34,366 31,420 27,449
Denominator for diluted (loss) income per common share (in shares)                 34,366 31,427 27,449
Loss per share from continuing operations                      
Basic and diluted (in dollars per share)                 $ (0.29) $ (0.44) $ (0.42)
Income per share from discontinued operations                      
Basic (in dollars per share)                 2.21 0.27 0.28
Diluted (in dollars per share)                 2.14 0.27 0.28
Income (loss) per share all operations                      
Basic (in dollars per share) $ (100) $ (10) $ (0.09) $ (0.08) $ (90) $ (90) $ (130) $ (130) 1.93 (0.16) (0.14)
Diluted (in dollars per share)                 $ 1.86 $ (0.17) $ (0.15)
Warrants                      
Denominator                      
Derivative liability warrants (in shares)                 0 7 16
Effect of dilutive securities: (in shares)                 0 0 16
Income (loss) per share all operations                      
Anti-dilutive instruments excluded from diluted (loss) per common share - continuing operations: (in shares)                 0 7 0
Anti-dilutive instruments excluded from diluted income per common share - discontinued operations: (in shares)                 0 7 0
Options                      
Denominator                      
Effect of dilutive securities: (in shares)                 1,181 0 0
Income (loss) per share all operations                      
Anti-dilutive instruments excluded from diluted (loss) per common share - continuing operations: (in shares)                 1,181 646 580
Anti-dilutive instruments excluded from diluted income per common share - discontinued operations: (in shares)                 0 646 580
Anti-dilutive instruments excluded from diluted income (loss) per common share - all operations: (in shares)                 0 646 580
Preferred Stock                      
Income (loss) per share all operations                      
Anti-dilutive instruments excluded from diluted (loss) per common share - continuing operations: (in shares)                 0 0 1,951
Anti-dilutive instruments excluded from diluted income per common share - discontinued operations: (in shares)                 0 0 1,951
Anti-dilutive instruments excluded from diluted income (loss) per common share - all operations: (in shares)                 0 0 1,951