Note 4 - Stock Options - Stock Option Activity (Details) - shares	3 Months Ended
	Feb. 28, 2017	Feb. 29, 2016
Options outstanding at beginning of year (in shares)	0	237,500
Granted (in shares)
Forfeited or expired (in shares)		(62,500)
Exercised (in shares)
Outstanding at end of period (in shares)	0	175,000