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Equipment and Leasehold Improvements (Summary of Major Categories of Equipment and Leasehold Improvements) (Details) - USD ($) | Jun. 30, 2024 | Jun. 30, 2023
--- | --- | ---
Property, Plant and Equipment [Line Items] |  |
Property, plant and equipment, gross | $ 8,450,382 | $ 8,779,972
Less: accumulated depreciation and amortization | 7,226,991 | 7,826,069
Equipment and leasehold improvements, net | 1,223,391 | 953,903
Machinery and Equipment [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Property, plant and equipment, gross | $ 619,064 | 619,064
Machinery and Equipment [Member] | Minimum [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Estimated useful lives (in years) | 5 years |
Machinery and Equipment [Member] | Maximum [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Estimated useful lives (in years) | 10 years |
Furniture and Office Equipment [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Property, plant and equipment, gross | $ 337,419 | 337,419
Furniture and Office Equipment [Member] | Minimum [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Estimated useful lives (in years) | 5 years |
Furniture and Office Equipment [Member] | Maximum [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Estimated useful lives (in years) | 10 years |
Tooling [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Estimated useful lives (in years) | 5 years |
Property, plant and equipment, gross | $ 3,765,766 | 4,506,044
Computer & Technology Equipment [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Property, plant and equipment, gross | $ 197,073 | 197,072
Computer & Technology Equipment [Member] | Minimum [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Estimated useful lives (in years) | 3 years |
Computer & Technology Equipment [Member] | Maximum [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Estimated useful lives (in years) | 5 years |
Leasehold Improvements [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Property, plant and equipment, gross | $ 3,171,070 | 2,864,335
Leasehold Improvements [Member] | Minimum [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Estimated useful lives (in years) | 3 years |
Leasehold Improvements [Member] | Maximum [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Estimated useful lives (in years) | 11 years |
Assets in Progress [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Property, plant and equipment, gross | $ 359,990 | $ 256,038

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