Condensed Consolidated Statements of Cash Flows - USD ($)	3 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Statement of Cash Flows [Abstract]
Net Cash Used in Operating Activities	$ (915,000)	$ (1,137,000)
Cash Flows Provided by (Used in) Investing Activities:
Expenditures for property, plant and equipment - continuing operations	(191,000)	(476,000)
Expenditures for property, plant and equipment - discontinued operations	0	(53,000)
Proceeds from sale of property, plant and equipment - continuing operations	401,000	5,000
Proceeds from sale of investment in minority owned equity investment	1,064,000	0
Net Cash Provided by (Used in) Investing Activities	1,274,000	(524,000)
Cash Flows Provided by (Used in) Financing Activities:
Proceeds from share options exercises	0	6,000
Payments on long-term debt - discontinued operations	0	(11,000)
Net Cash Used in Financing Activities	0	(5,000)
Net Increase (Decrease) in Cash and Cash Equivalents	359,000	(1,666,000)
Cash and Cash Equivalents Beginning of Period	7,170,000	4,486,000
Cash and Cash Equivalents End of Period	7,529,000	2,820,000
Cash Paid (Received) for:
Interest	(58,000)	(22,000)
Income taxes	0	43,000
Non-cash investing and financing activities:
Right-of-use assets obtained in exchange for operating lease liabilities	$ 37,000	$ 18,000