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Note 6 - Other Assets (Details Textual) - USD ($) | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022
Prepaid Rent [Member] |  |
Amortization of Deferred Charges | $ 115,000 | $ 115,000

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- Definition The amount of amortization of deferred charges applied against earnings during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.3) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483621/220-10-S99-2 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |