Quarterly report pursuant to Section 13 or 15(d)

Stock-based compensation - Assumptions (Details)

v3.2.0.727
Stock-based compensation - Assumptions (Details)
3 Months Ended 6 Months Ended 12 Months Ended
Jan. 05, 2015
USD ($)
employee
$ / shares
shares
May. 31, 2015
USD ($)
$ / shares
shares
Feb. 28, 2015
$ / shares
shares
May. 31, 2014
USD ($)
May. 31, 2015
USD ($)
shares
May. 31, 2014
USD ($)
Nov. 30, 2014
$ / shares
shares
Nov. 30, 2013
shares
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]                
Risk-free interest rate 1.57%              
Dividend yield $ 0              
Stock volatility 37.74%              
Option Term (years) 10 years              
Shares issued (shares) | shares 175,000 312,000 312,000   312,000   137,000 0
Number of employees granted shares | employee 8              
Weighted average exercise price (usd per share) | $ / shares $ 3.48 $ 0.00 $ 3.48       $ 3.40  
Share Price (usd per share) | $ / shares $ 3.48              
Award vesting percent 20.00%              
Share based compensation of shares issued $ 297,834              
Award vesting period 5 years              
Share-based compensation   $ 23,897   $ 5,400 $ 58,662 $ 10,800    
Richard Kornhauser                
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]                
Shares issued (shares) | shares 100,000              
Stephen Heit                
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]                
Shares issued (shares) | shares 35,000