Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
Mar. 31, 2023	Mar. 31, 2022
Statement Of Cash Flows [Abstract]
Net Cash Used in Operating Activities	$ (119)	$ (368)
Cash Flows Provided by (Used in) Investing Activities:
Expenditures for property, plant and equipment	(1,525)	(2,436)
Proceeds from sale of other assets	213	11
Net Cash Used in Investing Activities	(1,312)	(2,425)
Cash Flows Provided by (Used in) Financing Activities:
Proceeds from share options exercises	49	0
Payments on long-term debt	(30)	(25)
Net Cash Provided by (Used in) Financing Activities	19	(25)
Net Decrease in Cash and Cash Equivalents	(1,412)	(2,818)
Cash and Cash Equivalents Beginning of Period	6,794	9,962
Cash and Cash Equivalents End of Period	5,382	7,144
Cash Paid (Received) for:
Interest	(46)	8
Income taxes	(32)	2
Non-cash investing and financing activities:
Right-of-use assets obtained in exchange for operating lease liabilities	$ 24	$ 324

Interest paid received net.

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Proceeds from share option exercises.

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Supplemental cash flow information cash paid for received from income taxes and interest.

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Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage. Excludes amount for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Amount of increase (decrease) in cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage; excluding effect from exchange rate change. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes.

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Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit.

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Amount of cash inflow (outflow) from investing activities, including discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets.

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Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.

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The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.

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