Consolidated Balance Sheets (Parenthetical) (USD $)	Jun. 30, 2012	Mar. 31, 2012
Consolidated Balance Sheets [Abstract]
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	120,000,000	120,000,000
Common stock, shares issued	26,314,004	26,261,874
Common stock, shares outstanding	11,274,291	11,308,773
Treasury stock, shares	15,039,713	14,953,101