Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($)	May 31, 2023	Nov. 30, 2022
Accounts Receivable, Allowance for Credit Loss, Current	$ 36,684	$ 34,699
Preferred Stock, Par or Stated Value Per Share (in dollars per share)	$ 0.01	$ 0.01
Preferred Stock, Par or Stated Value Per Share (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, authorized (in shares)	500,000	500,000
Preferred stock, authorized (in shares)	500,000	500,000
Preferred Stock, Shares Issued (in shares)	0	0
Preferred Stock, Shares Outstanding (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)	5,110,921	5,013,671
Treasury Stock, Common, Shares (in shares)	92,348	64,574