Quarterly report pursuant to Section 13 or 15(d)

Note 4 - Marketable Securities (Details Textual)

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Note 4 - Marketable Securities (Details Textual) - USD ($)
Mar. 31, 2022
Dec. 31, 2021
Accrued Interest Receivable On Available For Sale Securities [Member]    
Interest Receivable $ 166,000 $ 130,000