Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Dec. 31, 2017	Mar. 31, 2017
Statement Of Financial Position [Abstract]
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	150,000,000	150,000,000
Common stock, shares issued	109,322,626	104,551,466
Common stock, shares outstanding	109,322,626	104,551,466