BALANCE SHEET (Parenthetical) - USD ($)	Dec. 31, 2020	Jun. 30, 2020
Allowances for accounts receivable (in dollars)	$ 170,000	$ 170,000
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	1,500,000	1,500,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	30,000,000	30,000,000
Common stock, shares issued	5,213,902	5,213,902
Common stock, shares outstanding	4,013,537	4,013,537
Treasury stock, at cost	1,200,365	1,200,365
Series A Preferred Stock
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	200,000	200,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0