Stock Options and Stock-Based Compensation (Details Textual) (USD $)	3 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Stock Options and Stock-Based Compensation (Textual) [Abstract]
Common stock grants	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	11.70%	9.30%
Stock compensation expense for time based options and performance based options		$ 334,000
Weighted-average of grant date fair value options granted	$ 16.25	$ 20.31
Stock compensation expense	$ 38,000	$ 334,000