Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions (Details) (USD $)
6 Months Ended
Sep. 30, 2012
Stock Based Compensation Schedule Of Share-based Payment Award, Stock Options, Valuation Assumptions 1 $ 0
Stock Based Compensation Schedule Of Share-based Payment Award, Stock Options, Valuation Assumptions 2 0
Stock Based Compensation Schedule Of Share-based Payment Award, Stock Options, Valuation Assumptions 3 65
Stock Based Compensation Schedule Of Share-based Payment Award, Stock Options, Valuation Assumptions 4 70.00%
Stock Based Compensation Schedule Of Share-based Payment Award, Stock Options, Valuation Assumptions 5 $ 87
Stock Based Compensation Schedule Of Share-based Payment Award, Stock Options, Valuation Assumptions 6 91.00%
Stock Based Compensation Schedule Of Share-based Payment Award, Stock Options, Valuation Assumptions 7 0.19
Stock Based Compensation Schedule Of Share-based Payment Award, Stock Options, Valuation Assumptions 8 0.33%
Stock Based Compensation Schedule Of Share-based Payment Award, Stock Options, Valuation Assumptions 9 0.25
Stock Based Compensation Schedule Of Share-based Payment Award, Stock Options, Valuation Assumptions 10 1.21%
Stock Based Compensation Schedule Of Share-based Payment Award, Stock Options, Valuation Assumptions 7 3.19
Stock Based Compensation Schedule Of Share-based Payment Award, Stock Options, Valuation Assumptions 8 3.25