Consolidated Balance Sheets (Parentheticals) - USD ($)	Nov. 30, 2023	Nov. 30, 2022
Trade accounts and notes receivable, allowance for doubtful accounts	$ 28,873	$ 10,873
Property, plant and equipment, accumulated depreciation	159,414	159,414
Definite lived intangible assets, accumulated amortization	$ 138,541	$ 134,733
Preferred shares, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred shares, authorized (in shares)	4,000,000	4,000,000
Preferred shares, outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, authorized (in shares)	15,000,000	15,000,000
Common stock, issued (in shares)	8,466,953	8,466,953
Common stock, outstanding (in shares)	7,263,508	7,263,508
Series A Preferred Stock [Member]
Preferred shares, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred shares, authorized (in shares)	1,000,000	1,000,000
Preferred shares, outstanding (in shares)	0	0