Consolidated Balance Sheets (Parentheticals) - USD ($)	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2003
Accounts Receivable, Allowance for Credit Loss, Current		$ 206,093	$ 170,103
Preferred Stock, Par or Stated Value Per Share (in dollars per share)	$ 0.01	$ 0.01
Common Stock, Par or Stated Value Per Share (in dollars per share)	0.01	0.01
Common Stock, Par or Stated Value Per Share (in dollars per share)	$ 0.01	$ 0.01
Common Stock, Shares Authorized (in shares)	50,000,000	50,000,000
Common Stock, Shares, Issued (in shares)	18,309,051	18,460,538
Common Stock, Shares, Outstanding, Ending Balance (in shares)	18,309,051	18,460,538
Series B Preferred Stock [Member]
Preferred Stock, Shares Authorized (in shares)	700,000	700,000
Preferred Stock, Shares Outstanding (in shares)	625,375	625,375
Preferred Stock, Shares Issued (in shares)	625,375	625,375
Series B-1 Preferred Stock [Member]
Preferred Stock, Shares Authorized (in shares)	550,000	550,000
Preferred Stock, Shares Outstanding (in shares)	212,402	212,402
Preferred Stock, Shares Issued (in shares)	212,402	212,402