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ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Numerator:        
Net (loss) income attributable to common stockholders $ (7,886) $ (423) $ (9,397) $ 2,944
Denominator:        
Denominator for basic net (loss) income per share - weighted average outstanding shares (in shares) 46,681,585 47,481,004 47,487,607 48,066,267
Effect of dilutive securities:        
Stock options and restricted stock (in shares) 0 0 0 1,173,898
Denominator for diluted net (loss) income per share - weighted-average outstanding shares (in shares) 46,681,585 47,481,004 47,487,607 49,240,165
Net (loss) income attributable to common stockholders per share - basic $ (0.17) $ (0.01) $ (0.20) $ 0.06
Net (loss) income attributable to common stockholders per share -diluted $ (0.17) $ (0.01) $ (0.20) $ 0.06