Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Common Shares [Member]	Additional Paid-in Capital [Member]	Retained Earnings (Loss) [Member]	Accumulated Other Comprehensive Earnings (Loss) [Member]
Beginning Balance at Jun. 30, 2021	$ 20,810	$ 3,463	$ 10,700	$ 6,809	$ (162)
Beginning Balance,Shares at Jun. 30, 2021		6,924,000
Net earnings (loss)	(2,009)	$ 0	0	(2,009)	0
Minimum pension liability adjustment	268	0	0	0	268
Share options exercised	$ 51	$ 15	36	0	0
Share options exercised, Shares	30,000	30,000
Ending Balance at Jun. 30, 2022	$ 19,120	$ 3,478	10,736	4,800	106
Ending Balance, Shares at Jun. 30, 2022	6,954,000	6,954,000
Net earnings (loss)	$ (1,795)	$ 0	0	(1,795)	0
Minimum pension liability adjustment	44	0	0	0	44
Share options exercised	$ 48	$ 38	10	0	0
Share options exercised, Shares	195,000	78,000
Ending Balance at Jun. 30, 2023	$ 17,417	$ 3,516	$ 10,746	$ 3,005	$ 150
Ending Balance, Shares at Jun. 30, 2023	7,032,000	7,032,000