Property, Plant, and Equipment (Details) - USD ($)	3 Months Ended		6 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022	Jun. 30, 2023
Property plant and equipment
Gross	$ 53,054,000		$ 53,054,000		$ 52,371,000
Less: accumulated depreciation and amortization	(43,983,000)		(43,983,000)		(43,063,000)
Net	9,071,000		9,071,000		9,308,000
Depreciation and amortization	467,000	$ 379,000	920,000	$ 747,000
Land
Property plant and equipment
Gross	904,000		904,000		904,000
Buildings
Property plant and equipment
Gross	$ 8,911,000		$ 8,911,000		8,911,000
Buildings | Minimum
Property plant and equipment
Useful life	30 years		30 years
Buildings | Maximum
Property plant and equipment
Useful life	40 years		40 years
Molds and dies
Property plant and equipment
Gross	$ 7,530,000		$ 7,530,000		7,517,000
Molds and dies | Minimum
Property plant and equipment
Useful life	3 years		3 years
Molds and dies | Maximum
Property plant and equipment
Useful life	5 years		5 years
Furniture and fixtures
Property plant and equipment
Gross	$ 3,500,000		$ 3,500,000		3,387,000
Furniture and fixtures | Minimum
Property plant and equipment
Useful life	5 years		5 years
Furniture and fixtures | Maximum
Property plant and equipment
Useful life	10 years		10 years
Machinery and equipment
Property plant and equipment
Gross	$ 29,080,000		$ 29,080,000		28,574,000
Machinery and equipment | Minimum
Property plant and equipment
Useful life	3 years		3 years
Machinery and equipment | Maximum
Property plant and equipment
Useful life	10 years		10 years
Building improvements
Property plant and equipment
Gross	$ 3,129,000		$ 3,129,000		$ 3,078,000
Property Plant And Equipment Estimated Useful Lives	us-gaap:UsefulLifeShorterOfTermOfLeaseOrAssetUtilityMember		us-gaap:UsefulLifeShorterOfTermOfLeaseOrAssetUtilityMember