Convertible Preferred Stock (Details) - Series A Preferred Stock	3 Months Ended
	Apr. 30, 2017 $ / shares shares
Class of Stock [Line Items]
Preferred stock, shares issued (in shares) | shares	2,949,995
Number of common shares for each convertible preferred share (in shares) | shares	1
Maximum period of conversion (in days)	10 days
Minimum share price (in dollars per share) (greater than) | $ / shares	$ 8.00
Average daily trading volume period prior to measurement date (in days)	60 days
Average daily trading volume minimum shares (in shares) | shares	100,000
Price per share at time of conversion (in dollars per share) | $ / shares	$ 3.00
Shares issued, price per share (in dollars per share) | $ / shares	$ 3.00