Note 12 - Equity Incentive Plan - Option Activity (Details) - $ / shares	12 Months Ended
	Nov. 30, 2022	Nov. 30, 2021	Nov. 30, 2020
Options O/S, Shares (in shares)	22,000	36,000
Options O/S, Weighted average exercise price (in dollars per share)	$ 5.93	$ 6.40
Granted, Shares (in shares)		0	0
Granted, Weighted average exercise price (in dollars per share)	$ 0	$ 0
Exercised, Shares (in shares)	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)	(10,000)	(14,000)
Options Expired or Forfeited, Weighted Average Exercise Price (in dollars per share)	$ 6.15	$ 7.14
Options O/S, Shares (in shares)	12,000	22,000	36,000
Options O/S at beginning of period, Weighted Average Exercise Price (in dollars per share)	$ 5.75	$ 5.93	$ 6.40
Options Outstanding at the End of the Period, Weighted Average Remaining Contractual Term (Year)	1 year 4 months 24 days	2 years 14 days
Options Exer. At end of the Period, Shares (in shares)	12,000	22,000
Options Exer. At end of the Period, Weighted Average Exercise Price (in dollars per share)	$ 5.75	$ 5.93	$ 6.40
Options Exer. At end of the Period, Weighted Average Remaining Contractual Term (Year)	1 year 4 months 24 days	2 years 14 days
Options Exer. At end of the Period, Weighted Average Remaining Contractual Term (Year)	1 year 4 months 24 days	2 years 14 days