Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events (Details)

v3.7.0.1
Subsequent Events (Details)
3 Months Ended 12 Months Ended
Jun. 20, 2017
USD ($)
employee
$ / shares
shares
May 31, 2017
shares
Feb. 28, 2017
shares
May 31, 2016
$ / shares
Nov. 30, 2016
$ / shares
shares
Nov. 30, 2015
$ / shares
shares
Jun. 07, 2017
shares
Jun. 06, 2017
shares
Subsequent Event [Line Items]                
Granted (shares) | shares   0 0   519,000 185,000    
Granted (usd per share) | $ / shares       $ 0 $ 3.23 $ 3.46    
Subsequent Event                
Subsequent Event [Line Items]                
Number of shares authorized (shares) | shares             1,400,000 700,000
Number of employees granted options | employee 11              
Granted (shares) | shares 232,500              
Granted (usd per share) | $ / shares $ 3.30              
Annual award vesting percent 20.00%              
Non-Executive Director | Subsequent Event                
Subsequent Event [Line Items]                
Annual directors' compensation | $ $ 20,000              
Directors' compensation, each meeting attended in person | $ 500              
Directors' compensation, each meeting attended by telephone | $ $ 250