Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($)	May 31, 2024	Nov. 30, 2023
Trade accounts and notes receivable, allowance for doubtful accounts	$ 49,618	$ 28,873
Property, plant and equipment, accumulated depreciation	159,414	159,414
Definite lived intangible assets, accumulated amortization	$ 140,502	$ 138,541
Preferred Stock, Par or Stated Value Per Share (in dollars per share)	$ 0.001	$ 0.001
Preferred shares, authorized (in shares)	4,000,000	4,000,000
Preferred Stock, 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 Stock, Par or Stated Value Per Share (in dollars per share)	$ 0.001	$ 0.001
Preferred shares, authorized (in shares)	1,000,000	1,000,000
Preferred Stock, Shares Outstanding (in shares)	0	0