NET INCOME (LOSS) PER COMMON SHARE (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Numerator [Abstract]
Net income (loss) - Basic	$ (5,468)	$ 5,989	$ 4,275	$ (2,579)
Denominator [Abstract]
Weighted average common shares outstanding - Basic	46,006,290	45,314,893	45,916,536	43,101,933
Effect of dilutive shares [Abstract]
Common stock equivalents arising from stock options, warrants and ESPP		(240)		1,059,293
Restricted stock awards and units (in shares)				425,371
Weighted average common shares outstanding - Diluted	46,006,290	46,799,557	46,912,557	43,101,933
Net income (loss) per common share [Abstract]
Basic	$ (0.12)	$ 0.13	$ 0.09	$ (0.06)
Diluted	$ (0.12)	$ 0.12	$ 0.09	$ (0.06)
Antidilutive securities excluded from computation of earnings per share amount	1,447,301		1,769,470