Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2013

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Details of Weighted-Average Grant-Date Fair Values and Assumptions Used for Estimating Fair Values

The following table details the weighted-average grant-date fair values and the assumptions used for estimating the fair values of stock option grants made during the nine months ended September 30, 2013:

	Stock Options
Weighted-average grant-date fair value	$	4.01
Expected life, in years		6.0
Risk-free interest rate		1.2% - 1.4	%
Expected volatility		83.9% - 86.4	%