STOCK-BASED COMPENSATION (Tables)

9 Months Ended

Sep. 30, 2013

STOCK-BASED COMPENSATION

Schedule of principal assumptions used in applying the Black-Scholes option pricing model for the awards

	Three Months Ended September 30,		Nine Months Ended September 30,
	2013	2012	2013	2012
Risk-free interest rate	0.50% to 0.86%	—	0.50%	0.97%
Dividend yield	n/a	—	n/a	n/a
Volatility factor of the expected market price of common stock	66% to 69%	—	66%	75%
Weighted-average expected life of option	3.5 years	—	3.5 years	6.0 years
Weighted-average grant date fair value	$1.02	—	$1.01	$3.80