NET INCOME (LOSS) PER SHARE (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Numerator for basic and diluted loss per share
Net income (loss)	$ (3,854)	$ 1,260
Denominator
Weighted Average Number of Shares Outstanding, Basic (shares)	37,020	36,235
Dilutive Securities, Effect on Basic Earnings Per Share, Dilutive Convertible Securities	0	1,885
Incremental Common Shares Attributable to Dilutive Effect of Conversion of Debt Securities	0	3,652
Incremental Common Shares Attributable to Dilutive Effect of Call Options and Warrants	0	6
Incremental Common Shares Attributable to Dilutive Effect of Equity Unit Purchase Agreements	0	1
Weighted Average Number of Shares Outstanding, Diluted (shares)	37,020	41,779
Basic and diluted net income (loss) per share of common stock	$ (0.10)	$ 0.03