BASIC AND DILUTED NET INCOME (LOSS) PER SHARE (Tables)

3 Months Ended

Mar. 31, 2013

BASIC AND DILUTED NET INCOME (LOSS) PER SHARE

Schedule of shares used to calculate diluted earnings per share

	Three months ended March 31,
	2013			2012
Numerator:
Net income (loss)	$	(6,763	)	$	28,840
Denominator:
Weighted average number of common shares outstanding	34,353,277			34,136,333
Effect of dilutive securities:
Stock options	—			129,305
Dilutive potential common shares	—			129,305
Shares used in calculating diluted earnings per share	34,353,277			34,265,638

Schedule of number of shares of potentially dilutive common stock related to options and warrants that were excluded from the calculation of dilutive shares

	Three Months Ended
	March 31,
	2013	2012
Options	5,736,970	4,334,082
Warrants	4,086	4,086
Total	5,741,056	4,338,168