Stock Based Compensation and Stock Options (Details Textual) (USD $)	3 Months Ended		6 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012
Stock Options and Stock-Based Compensation (Textual) [Abstract]
Common stock grants	9,682,500		9,682,500
Stock options vested, percent			25.00%
Remaining vested options, percent			75.00%
Options for employees expiring from date of grant, period, years			5 years
Options for board of directors expiring from date of grant, period, years			10 years
Options expected forfeiture rate, percentage	11.86%	9.36%
Weighted-average of grant-date fair value options granted	$ 17.34	$ 17.59
Stock compensation expense	$ 0	$ 334,000
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-statutory stock options vesting period			36 months
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-statutory stock options vesting period			1 year