Consolidated Balance Sheets (Parenthetical) - $ / shares	Jan. 31, 2017	Apr. 30, 2016
Statement of Financial Position [Abstract]
Common stock, shares authorized	150,000,000	150,000,000
Common stock, no par value
Common stock, shares issued	83,708,686	32,779,298
Common stock, shares outstanding	83,708,686	32,779,298