Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2013

Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]

Estimates Weighted-average Fair Value Per Share of Options Granted

The following assumptions were used for each respective period to calculate our stock-based compensation for each stock option grant on the date of the grant:

	Year Ended December 31,		Six Months Ended December 31,		Fiscal Year Ended June 30,
	2013	2012	2011	2010	2011
				(Unaudited)
Stock Options:
Expected volatility	50% - 52%	53% - 57%	56% - 69%	57% - 67%	50% - 69%
Expected term (in years)	6.02	6.05	5.75	6.04	6.05
Risk-free interest rate	0.91% - 2.05%	0.83% - 1.18%	0% - 1.92%	1.43% - 2.06%	1.43% - 2.96%
Dividend yield	—	—	—	—	—

The following assumptions were used to calculate our stock-based compensation for each stock purchase right granted under the 2012 ESPP:

	Year Ended December 31,
	2013	2012
ESPP:
Expected volatility	35% - 42%	42	%
Expected term (in years)	0.50	0.58
Risk-free interest rate	0.08% - 0.16%	0.16	%
Dividend yield	—	—