Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements (Details Narrative)

v3.7.0.1
Fair Value Measurements (Details Narrative) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
Jan. 18, 2017
Apr. 19, 2016
Apr. 30, 2017
Apr. 30, 2016
Apr. 30, 2017
Apr. 30, 2016
Oct. 31, 2016
Fair Value Disclosures [Abstract]              
Number of warrant to purchase shares of common stock   187,500          
Warrant exercisable price per share   $ 6.90          
Warrant expiry date   Apr. 19, 2018          
Fair value of warrants $ 78   $ 26 $ 8 $ 26 $ 70
Stock price $ 3.62           $ 3.58
Risk-free rate 0.97%           0.75%
Expected volatility 68.00%           61.00%