Note 7 - Restricted Investment in Stocks (Details Textual)	3 Months Ended
	Mar. 31, 2024 USD ($) shares	Dec. 31, 2023 USD ($)	Sep. 28, 2023
Schedule of Investments [Line Items]
Restricted investment in stocks	$ 2,730,000	$ 2,730,000
Conversion factor per share			1.5875
Impairment charge of restricted investment	0
Investment in Federal Home Loan Bank Stock [Member]
Schedule of Investments [Line Items]
Restricted investment in stocks	1,718,000
Investment in Atlantic Community Bankers Bank Stock [Member]
Schedule of Investments [Line Items]
Restricted investment in stocks	12,000
Investment In SHCPFIC Preferred Stock [Member]
Schedule of Investments [Line Items]
Restricted investment in stocks	$ 1,000,000
Number of shares owned | shares	100
VISA Class B Stock [Member]
Schedule of Investments [Line Items]
Restricted investment in stocks	$ 0
Number of shares owned | shares	6,502