Note 7 - Patents |
3 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Notes to Financial Statements | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Goodwill and Intangible Assets Disclosure [Text Block] |
NOTE 7 — PATENTS
Patents are amortized utilizing the straight-line method over estimated useful lives ranging from 3 to 20 years. Amortization expense was approximately $13,000 and $11,000 for the three months ended March 31, 2022, and March 31, 2021, respectively. The annual amortization expense expected to be recorded for existing intangibles assets for the years 2022 through 2026 and thereafter, is approximately $40,000, $52,000, $34,000, $28,000 and $110,000.
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