Note 7 - Patents (Details Textual) - USD ($) |
3 Months Ended | 9 Months Ended | ||
---|---|---|---|---|
Sep. 30, 2020 |
Sep. 30, 2019 |
Sep. 30, 2020 |
Sep. 30, 2019 |
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Amortization of Intangible Assets, Total | $ 13,000 | $ 13,000 | $ 39,759 | $ 39,760 |
Patents [Member] | Minimum [Member] | ||||
Finite-Lived Intangible Asset, Useful Life (Year) | 3 years | |||
Patents [Member] | Maximum [Member] | ||||
Finite-Lived Intangible Asset, Useful Life (Year) | 20 years |
X | ||||||||||
- Definition 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. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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X | ||||||||||
- Definition 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. No definition available.
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- Details
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