Consolidated Balance Sheets (Parentheticals) - USD ($)	Jun. 30, 2022	Jun. 30, 2021
Allowance for Doubtful Accounts	$ 206,093	$ 234,693
Preferred Stock, authorized (in shares)	30,000,000	30,000,000
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common Stock, par (in dollars per share)	$ 0.01	$ 0.01
Common Stock, authorized (in shares)	50,000,000	50,000,000
Common Stock, issued (in shares)	18,460,538	19,351,935
Common stock, outstanding (in shares)	18,460,538	19,351,935
Series B Preferred Stock [Member]
Preferred Stock, authorized (in shares)	700,000	700,000
Preferred Stock, issued (in shares)	625,375	625,375
Preferred Stock, outstanding (in shares)	625,375	625,375
Series B-1 Preferred Stock [Member]
Preferred Stock, authorized (in shares)	550,000	550,000
Preferred Stock, issued (in shares)	212,402	212,402
Preferred Stock, outstanding (in shares)	212,402	212,402