Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Statement of Cash Flows [Abstract]
Net Cash Used in Operating Activities	$ (1,137)	$ (1,271)
Cash Flows Provided by (Used in) Investing Activities:
Expenditures for property, plant and equipment - continuing operations	(476)	(315)
Expenditures for property, plant and equipment - discontinued operations	(53)	(309)
Proceeds from sale of property, plant and equipment - continuing operations	5	13
Net Cash Used in Investing Activities	(524)	(611)
Cash Flows Provided by (Used in) Financing Activities:
Proceeds from share options exercises	6	49
Payments on long-term debt - continuing operations	(11)	(10)
Net Cash Provided by (Used in) Financing Activities	(5)	39
Net Decrease in Cash and Cash Equivalents	(1,666)	(1,843)
Cash and Cash Equivalents Beginning of Period	4,486	6,794
Cash and Cash Equivalents End of Period	2,820	4,951
Cash Paid (Received) for:
Interest	(22)	4
Income taxes	43	0
Non-cash investing and financing activities:
Right-of-use assets obtained in exchange for operating lease liabilities	$ 18	$ 7