CONSOLIDATED BALANCE SHEETS Parenthetical (USD $)	Sep. 30, 2011	Mar. 31, 2011
Stockholders' Equity Share Information
Preferred stock par value per share	$ 0.001	$ 0.001
Preferred stock shares authorized	5,000,000	5,000,000
Preferred stock shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock par value per share	$ 0.001	$ 0.001
Common stock shares authorized	450,000,000	450,000,000
Common stock shares issued	218,789,994	218,789,994
Common stock - shares outstanding	191,127,533	189,541,707
Treasury stock shares	27,662,461	29,248,287