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Note 2 - Summary of Significant Accounting Policies (Details Textual) - USD ($) | 12 Months Ended | 19 Months Ended
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2021
Asset Impairment Charges, Total | $ 0 | $ 0 |
Contract with Customer, Liability, Current | 0 | 209,000 | $ 0
Share-based Payment Arrangement, Expense | 185,000 | 375,000 |
Advertising Expense | 27,000 | 32,000 |
Restricted Stock [Member] | Incentive Plan 2020 [Member] |  |  |
Share-based Payment Arrangement, Expense | $ 131,000 | $ 6,000 |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) | 15,140 | 8,912 | 24,052
Minimum [Member] |  |  |
Finite-Lived Intangible Asset, Useful Life (Year) | 5 years |  |
Maximum [Member] |  |  |
Finite-Lived Intangible Asset, Useful Life (Year) | 17 years |  |

X
- Definition Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 720 -SubTopic 35 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6420018&loc=d3e36677-107848 + Details
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