Note 6 - Stockholders' Equity (Details Textual) - $ / shares															12 Months Ended
	Dec. 11, 2023	Sep. 12, 2023	Jun. 03, 2023	Mar. 13, 2023	Dec. 07, 2022	Sep. 09, 2022	Jun. 03, 2022	Mar. 07, 2022	Dec. 06, 2021	Mar. 04, 2021	Feb. 22, 2019	May 22, 2017	Aug. 18, 2015	May 06, 2013	Nov. 30, 2023	Nov. 30, 2022
Common Stock, Dividends, Per Share, Declared	$ 0.02														$ 0.05	$ 0.04
Preferred Stock Dividends Number of Rights Declared														1
Preferred Stock Dividends Number of Rights Minimum Percent of Common Stock that must be Acquired to Make Rights Exercisable														15.00%
Preferred Stock Dividends Number of Rights Minimum Percent of Common Stock that Must be Acquired to Make Rights Exercisable, Institutional Investors														20.00%
Right to Purchase Series A Preferred Stock [Member]
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right														0.01
Class of Warrant or Right, Exercise Price of Warrants or Rights														$ 0.9
Class of Warrant or Right, Term										11 years	9 years	7 years	5 years
Quarterly Dividend [Member]
Common Stock, Dividends, Per Share, Declared	0.01	$ 0.01	$ 0.01	$ 0.01	$ 0.02	$ 0.01	$ 0.01	$ 0.01	$ 0.01
Special Cash Distribution [Member]
Common Stock, Dividends, Per Share, Declared	$ 0.01