Schedule II - Valuation and Qualifying Accounts - Valuation and Qualifying Accounts (Details) - USD ($)		12 Months Ended
		Jun. 30, 2022	Jun. 30, 2021
Balance at Beginning of Period		$ 24,420	$ 0
Charged to Costs and Expenses			24,420
Adjustments			0
Balance at End of Period			24,420
SEC Schedule, 12-09, Allowance, Credit Loss [Member]
Balance at Beginning of Period		1,870,000	1,740,000
Charged to Costs and Expenses		255,000	346,000
Adjustments	[1]	384,000	216,000
Balance at End of Period		1,741,000	1,870,000
SEC Schedule, 12-09, Reserve, Inventory [Member]
Balance at Beginning of Period		10,279,000	9,863,000
Charged to Costs and Expenses		2,246,000	1,178,000
Adjustments	[1]	968,000	762,000
Balance at End of Period		11,557,000	10,279,000
SEC Schedule, 12-09, Valuation Allowance, Deferred Tax Asset [Member]
Balance at Beginning of Period		24,420,000
Charged to Costs and Expenses		0
Adjustments		1,323,000
Balance at End of Period		$ 23,097,000	$ 24,420,000

[1] Activity primarily represents amounts written-off during the year, along with other adjustments (primarily foreign currency translation adjustments).