Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2014

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Schedule of Fair Value of Each Option Award Granted

The fair value of each option award granted is estimated on the date of grant using the Black-Sholes option valuation model and assumptions as noted in the following table:

	March 31,
	2014	2013
Expected life	6.5 years	6.5 years
Expected volatility	75.51%	76.83%
Risk-free interest rate	2.14-2.45%	1.25-1.38%
Dividend yield	—	—