CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Jan. 31, 2017	Jan. 31, 2016
CONSOLIDATED BALANCE SHEETS
Series A convertible preferred stock, par value	$ 0.001	$ 0.001
Series A convertible preferred stock, shares authorized	10,000,000	10,000,000
Series A convertible preferred stock, shares issued	1,515	0
Series A convertible preferred stock, shares outstanding	1,515	0
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized	90,000,000	90,000,000
Common stock, shares issued	67,719,577	25,208,684
Common stock, shares outstanding	67,719,577	25,208,684