Consolidated Balance Sheets (Parentheticals) - USD ($)	Nov. 30, 2022	Nov. 30, 2021	Nov. 30, 2020
Accounts Receivable, Allowance for Credit Loss, Current		$ 34,699	$ 38,188
Preferred Stock, Par or Stated Value Per Share (in dollars per share)	$ 0.01	$ 0.01
Preferred Stock, Shares Authorized (in shares)	500,000	500,000
Preferred Stock, Shares Issued (in shares)	0	0
Preferred Stock, Shares Outstanding, Ending Balance (in shares)	0	0
Common Stock, Par or Stated Value Per Share (in dollars per share)	$ 0.01	$ 0.01
Common Stock, Shares Authorized (in shares)	9,500,000	9,500,000
Common Stock, Shares, Issued (in shares)	5,013,671	4,583,504
Treasury Stock, Shares, Total (in shares)	64,574	44,532