Note 12 - Equity Incentive Plan - Option Activity (Details) - $ / shares	12 Months Ended
	Nov. 30, 2021	Nov. 30, 2020
Options O/S at beginning of period, Shares (in shares)	36,000	59,000
Options O/S at beginning of period, Weighted Average Exercise Price (in dollars per share)	$ 6.40	$ 6.07
Granted, Weighted Average Exercise Price (in dollars per share)	$ 0	$ 0
Exercised, Shares (in shares)	0	0
Exercised, Weighted Average Exercise Price (in dollars per share)	$ 0	$ 0
Options Expired or Forfeited, Shares (in shares)	(14,000)	(23,000)
Options Expired or Forfeited, Weighted Average Exercise Price (in dollars per share)	$ 7.14	$ 5.56
Options O/S at end of Period, Shares (in shares)	22,000	36,000
Options O/S at end of period, Weighted Average Exercise Price (in dollars per share)	$ 5.93	$ 6.40
Options Outstanding at the End of the Period, Weighted Average Remaining Contractual Term (Year)	2 years 14 days	2 years 6 months 25 days
Options Exer. At end of the Period, Shares (in shares)	22,000	36,000
Options Exer. At end of the Period, Weighted Average Exercise Price (in dollars per share)	$ 5.93	$ 6.40
Options Exer. At end of the Period, Weighted Average Remaining Contractual Term (Year)	2 years 14 days	2 years 6 months 25 days