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Property, Plant, and Equipment (Details) - USD ($)
3 Months Ended 9 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2023
Mar. 31, 2022
Jun. 30, 2022
Property plant and equipment          
Gross $ 51,956,000   $ 51,956,000   $ 49,485,000
Less: accumulated depreciation and amortization (42,621,000)   (42,621,000)   (41,546,000)
Net 9,335,000   9,335,000   7,939,000
Depreciation and amortization 380,000 $ 338,000 1,127,000 $ 1,028,000  
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    
Buildings | Maximum          
Property plant and equipment          
Useful life     40 years    
Molds and dies          
Property plant and equipment          
Gross 7,507,000   $ 7,507,000   7,480,000
Molds and dies | Minimum          
Property plant and equipment          
Useful life     3 years    
Molds and dies | Maximum          
Property plant and equipment          
Useful life     5 years    
Furniture and fixtures          
Property plant and equipment          
Gross 3,350,000   $ 3,350,000   3,030,000
Furniture and fixtures | Minimum          
Property plant and equipment          
Useful life     5 years    
Furniture and fixtures | Maximum          
Property plant and equipment          
Useful life     10 years    
Machinery and equipment          
Property plant and equipment          
Gross 28,275,000   $ 28,275,000   26,696,000
Machinery and equipment | Minimum          
Property plant and equipment          
Useful life     3 years    
Machinery and equipment | Maximum          
Property plant and equipment          
Useful life     10 years    
Building improvements          
Property plant and equipment          
Gross $ 3,009,000   $ 3,009,000   $ 2,464,000
Useful life (estimated)     Shorter of the lease term or life of asset