Common stock options granted, forfeited or expired and exercised - Stock-Based Compensation (Details Narrative)	Jan. 31, 2017 USD ($) $ / shares shares
Options
Options Outstanding | shares	19,639
Options Exercisable | shares	19,639
Weighted Average Exercise Price per Share
Weighted Average Exercise Price per Share | $ / shares	$ 28.66
Weighted Average Exercise Price per Share, Exercisable | $ / shares	$ 28.66
Aggregate Intrinsic Vaalue
Outstanding, Aggregate Intrinsic Value | $	$ 70,836
Exercisable, Aggregate Intrinsic alue | $	$ 70,836