Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Total
Balance (in shares) at Jun. 30, 2020	29,680,843			34,900
Balance at Jun. 30, 2020	$ 59	$ 50,263	$ (44,156)	$ (99)	$ 6,067
Stock compensation expense for employee stock options	0	8	0	0	8
Net income	$ 0	0	1,041	$ 0	1,041
Balance (in shares) at Sep. 30, 2020	29,680,843			34,900
Balance at Sep. 30, 2020	$ 59	50,271	(43,115)	$ (99)	7,116
Balance (in shares) at Jun. 30, 2021	29,838,177			34,900
Balance at Jun. 30, 2021	$ 60	50,516	(36,143)	$ (99)	14,334
Stock compensation expense for employee stock options	$ 0	37	0	$ 0	37
Shares issued upon exercise of stock options (in shares)	17,000
Shares issued upon exercise of stock options	$ 0	4			4
Net income	$ 0	0	516	$ 0	516
Balance (in shares) at Sep. 30, 2021	29,855,177			34,900
Balance at Sep. 30, 2021	$ 60	$ 50,557	$ (35,627)	$ (99)	$ 14,891