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Note 6 - Stock Options - Stock Option Activity (Details) - $ / shares
12 Months Ended
Nov. 30, 2015
Nov. 30, 2014
Minimum [Member]    
Outstanding at end of year (in dollars per share) $ 1.275  
Maximum [Member]    
Options outstanding at beginning of year (in dollars per share) $ 1.156  
Outstanding at end of year (in dollars per share)   $ 1.156
Options outstanding at beginning of year (in shares) 314,400 368,373
Options outstanding at beginning of year (in dollars per share) $ 1.16 $ 1.16
Forfeited or expired (in shares) (76,900) (53,973)
Forfeited or expired (in dollars per share) $ 0.93 $ 0.96
Outstanding at end of year (in shares) 237,500 314,400
Outstanding at end of year (in dollars per share) $ 1.275 $ 1.16