Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

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Describes the periods of time over which an entity anticipates to receive utility from its property, plant and equipment (that is, the periods of time over which an entity allocates the initial cost of its property, plant and equipment).

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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Property, Plant, and Equipment (Details) - USD ($)	12 Months Ended
Property, Plant, and Equipment (Details) - USD ($)	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Property plant and equipment
Gross	$ 48,001,000	$ 46,995,000
Less: accumulated depreciation and amortization	(40,165,000)	(38,907,000)
Net	7,836,000	8,088,000
Depreciation and amortization	1,260,000	1,221,000	$ 1,085,000
Land [Member]
Property plant and equipment
Gross	904,000	904,000
Buildings [Member]
Property plant and equipment
Gross	$ 8,911,000	8,911,000
Buildings [Member] \| Minimum [Member]
Property plant and equipment
Useful life	30 years
Buildings [Member] \| Maximum [Member]
Property plant and equipment
Useful life	40 years
Molds and dies [Member]
Property plant and equipment
Gross	$ 7,416,000	7,337,000
Molds and dies [Member] \| Minimum [Member]
Property plant and equipment
Useful life	3 years
Molds and dies [Member] \| Maximum [Member]
Property plant and equipment
Useful life	5 years
Furniture and fixtures
Property plant and equipment
Gross	$ 2,813,000	2,792,000
Furniture and fixtures \| Minimum [Member]
Property plant and equipment
Useful life	5 years
Furniture and fixtures \| Maximum [Member]
Property plant and equipment
Useful life	10 years
Machinery and equipment
Property plant and equipment
Gross	$ 25,548,000	24,878,000
Machinery and equipment \| Minimum [Member]
Property plant and equipment
Useful life	7 years
Machinery and equipment \| Maximum [Member]
Property plant and equipment
Useful life	10 years
Building improvements
Property plant and equipment
Gross	$ 2,409,000	$ 2,173,000
Useful life (estimated)	Shorter of the lease term or life of asset