CONSOLIDATED STATEMENT OF STOCKHOLDERS EQUITY - USD ($)	Common Stock	Additional Paid-in Capital	Treasury Stock	Retained Earnings	Total
Balance at Jun. 30, 2020	$ 212,000	$ 17,766,000	$ (19,521,000)	$ 79,444,000	$ 77,901,000
Balance (in shares) at Jun. 30, 2020	21,241,066		(2,893,715)
Net income				2,319,000	2,319,000
Stock-based compensation expense		104,000			104,000
Balance at Sep. 30, 2020	$ 212,000	17,870,000	$ (19,521,000)	81,763,000	80,324,000
Balance (in shares) at Sep. 30, 2020	21,241,066		(2,893,715)
Balance at Jun. 30, 2020	$ 212,000	17,766,000	$ (19,521,000)	79,444,000	77,901,000
Balance (in shares) at Jun. 30, 2020	21,241,066		(2,893,715)
Balance at Sep. 30, 2021	$ 212,000	18,306,000	$ (19,521,000)	102,097,000	101,094,000
Balance (in shares) at Sep. 30, 2021	21,247,299		(2,893,715)
Balance at Jun. 30, 2021	$ 212,000	18,201,000	$ (19,521,000)	94,345,000	93,237,000
Balance (in shares) at Jun. 30, 2021	21,244,799		(2,893,715)
Net income				7,752,000	7,752,000
Stock-based compensation expense		89,000			89,000
Stock options exercised	$ 2,500	16,000			16,000
Balance at Sep. 30, 2021	$ 212,000	$ 18,306,000	$ (19,521,000)	$ 102,097,000	$ 101,094,000
Balance (in shares) at Sep. 30, 2021	21,247,299		(2,893,715)