Consolidated Balance Sheets (Parenthetical) - $ / shares	Sep. 30, 2015	Mar. 31, 2015
Statement of Financial Position [Abstract]
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	120,000,000	120,000,000
Common stock, shares issued	53,339,469	53,243,157
Common stock, shares outstanding	19,787,279	20,250,669
Treasury stock, shares	33,552,190	32,992,488