Note 13 - Equity Incentive Plan - Option Activity (Details) - $ / shares	12 Months Ended
	Nov. 30, 2016	Nov. 30, 2015
Options Outstanding at Beginning of Period, Shares (in shares)	174,000	160,000
Options Outstanding at Beginning of Period, Weighted Average Exercise Price (in dollars per share)	$ 8.39	$ 8.72
Granted, Shares (in shares)	0	14,000
Granted, Weighted Average Exercise Price (in dollars per share)		$ 4.70
Exercised, Shares (in shares)
Exercised, Weighted Average Exercise Price (in dollars per share)
Options Expired or Forfeited, Shares (in shares)	(30,500)
Options Expired or Forfeited, Weighted Average Exercise Price (in dollars per share)	$ 6.39
Options Outstanding at End of Period, Shares (in shares)	143,500	174,000
Options Outstanding at end of Period, Weighted Average Exercise Price (in dollars per share)	$ 8.78	$ 8.39
Options Outstanding at End of Period, Weighted Average Remaining Contractual Term (Year)	3 years 135 days	4 years 248 days
Options Exercisable at End of the Period, Shares (in shares)	143,500	169,000
Options Exercisable At end of the Period, Weighted Average Exercise Price (in dollars per share)	$ 8.78	$ 8.47
Options Exercisable At end of the Period, Weighted Average Remaining Contractual Term (Year)	3 years 135 days	4 years 208 days