Patents net (Details Narrative) - USD ($)	3 Months Ended	6 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Amortization of patent costs	$ 96,000	$ 94,000	$ 191,000	$ 188,000
Patents [Member]
June 30, 2022	191,000		191,000
June 30, 2023	381,000		381,000
June 30, 2024	381,000		381,000
June 30, 2025	381,000		381,000
June 30, 2026	372,000		372,000
June 30, 2027 and Thereafter	$ 901,000		$ 901,000
Future amortization period			14 years
Patents [Member] \| Minimum [Member] \| IntangibleAssets [Member]
Estimated remaining useful lives of the assets			12 years
Future amortization period			3 years 8 months 4 days
Patents [Member] \| Maximum [Member] \| IntangibleAssets [Member]
Estimated remaining useful lives of the assets			17 years
Future amortization period			16 years 9 months

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Amount of benefit for defined benefit plan expected to be paid in five fiscal years after fifth fiscal year following current fiscal year.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized in the next rolling twelve months following the latest balance sheet. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Remaining amortization period of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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-Publisher FASB
-Name Accounting Standards Codification
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