CONSOLIDATED STATEMENTS OF SHAREHOLDERS EQUITY - USD ($)	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income / Loss	Retained Earnings	Treasury Stock	Total
Balance beginning, Shares at Jun. 30, 2018	1,513,914				19,802
Balance beginning, Amount at Jun. 30, 2018	$ 75,700	$ 2,545,900	$ 1,200	$ 3,131,800	$ 52,400	$ 5,702,200
Cumulative effect of the adoption of ASU 2016-01 - Financial Instruments			(22,000)	22,000		0
Net income (loss)				645,600		645,600
Issuance of common stock and warrants, net of issuance costs, amount						0
Cash dividend declared and paid, $.05				(74,700)		(74,700)
Holding gain (loss) on investment securities, net of tax			20,800			20,800
Stock-based compensation		46,800				46,800
Balance ending, Shares at Jun. 30, 2019	1,513,914				19,802
Balance ending, Amount at Jun. 30, 2019	$ 75,700	2,592,700	0	3,724,700	$ 52,400	6,340,700
Net income (loss)				(703,300)		(703,300)
Issuance of common stock and warrants, net of issuance costs, shares	1,349,850
Issuance of common stock and warrants, net of issuance costs, amount	$ 67,500	5,936,900				(6,004,400)
Stock options exercised, shares	17,301
Stock options exercised, amount	$ 900	12,900				13,800
Stock-based compensation		65,800				65,800
Balance ending, Shares at Jun. 30, 2020	2,881,065				19,802
Balance ending, Amount at Jun. 30, 2020	$ 144,100	$ 8,608,300	$ 0	$ 3,021,400	$ 52,400	$ 11,721,400