Condensed Balance Sheets (Unaudited) (Parenthetical) - USD ($)	Mar. 31, 2022	Jun. 30, 2021
Statement of Financial Position [Abstract]
Accounts receivable, allowance for doubtful accounts	$ 45,000	$ 45,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, authorized	13,000,000	13,000,000
Common stock, issued	8,508,788	8,533,209
Common stock, outstanding	8,508,788	8,533,209