Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement Of Cash Flows [Abstract]
Net Cash Provided by (Used in) Operating Activities	$ 1,198	$ (300)
Cash Flows Used in Investing Activities:
Expenditures for property, plant and equipment - continuing operations	(1,299)	(884)
Proceeds from sale of other assets	40	558
Net Cash Used in Investing Activities	(1,259)	(326)
Cash Flows Used in Financing Activities:
Payments on long-term debt	(25)	(3,025)
Repurchase of common shares	0	(88)
Net Cash Used in Financing Activities	(25)	(3,113)
Net Decrease in Cash and Cash Equivalents	(86)	(3,739)
Cash and Cash Equivalents Beginning of Period	11,184	7,742
Cash and Cash Equivalents End of Period	11,098	4,003
Cash Paid (Received) for:
Interest	(1)	74
Income taxes	293	(43)
Non-cash investing and financing activities:
Assets acquired in exchange for note receivable	0	371
Shares issued from non-cash share option exercise	10	0
Right-of-use assets obtained in exchange for lease liabilities	$ 712	$ 1,463