Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Common Shares [Member]	Additional Paid-in Capital [Member]	Retained Earnings (Loss) [Member]	Accumulated Other Comprehensive Loss [Member]
Beginning Balance at Jun. 30, 2019	$ 15,043	$ 3,493	$ 10,744	$ 1,059	$ (253)
Beginning Balance,Shares at Jun. 30, 2019		6,987,000
Net earnings (loss)	(1,140)	$ 0	0	(1,140)	0
Minimum pension liability adjustment	(86)	0	0	0	(86)
Share-based compensation	28	$ 0	28	0	0
Share-based compensation, shares		0
Shares repurchased	$ (102)	$ (43)	(59)	0	0
Shares repurchased, shares		(88,000)
Share options exercised, Shares	0
Ending Balance at Jun. 30, 2020	$ 13,743	$ 3,450	10,713	(81)	(339)
Ending Balance, Shares at Jun. 30, 2020	6,899,000	6,899,000
Net earnings (loss)	$ 6,890	$ 0	0	6,890	0
Minimum pension liability adjustment	$ 177	0	0	0	177
Shares repurchased, shares	(87,534)
Share options exercised	$ 0	$ 13	(13)	0	0
Share options exercised, Shares	70,000	25,000
Ending Balance at Jun. 30, 2021	$ 20,810	$ 3,463	$ 10,700	$ 6,809	$ (162)
Ending Balance, Shares at Jun. 30, 2021	6,924,000	6,924,000