Note 13 - Equity Incentive Plan - Option Activity (Details) - $ / shares	12 Months Ended
	Nov. 30, 2017	Nov. 30, 2016
Options Outstanding at Beginning of Period, Shares (in shares)	143,500	174,000
Options Outstanding at Beginning of Period, Weighted Average Exercise Price (in dollars per share)	$ 8.78	$ 8.39
Granted, Shares (in shares)	0	0
Granted, Weighted Average Exercise Price (in dollars per share)
Exercised, Shares (in shares)
Exercised, Weighted Average Exercise Price (in dollars per share)
Options Expired or Forfeited, Shares (in shares)	(47,500)	(30,500)
Options Expired or Forfeited, Weighted Average Exercise Price (in dollars per share)	$ 10.84	$ 6.39
Options Outstanding at the End of the Period, Shares (in shares)	96,000	143,500
Options Outstanding at the End of the Period, Weighted Average Exercise Price (in dollars per share)	$ 7.77	$ 8.78
Options Outstanding at the End of the Period, Weighted Average Remaining Contractual Term (Year)	3 years 200 days	3 years 135 days
Options Exercisable at the End of the Period, Shares (in shares)	96,000	143,500
Options Exercisable at the End of the Period, Weighted Average Exercise Price (in dollars per share)	$ 7.77	$ 8.78
Options Exercisable at the End of the Period, Weighted Average Remaining Contractual Term (Year)	3 years 200 days	3 years 135 days