Note 7 - Restricted Investments in Stock (Details Textual)	3 Months Ended
	Mar. 31, 2025 USD ($) shares	Mar. 27, 2025	Dec. 31, 2024 USD ($)
Schedule of Investments [Line Items]
Restricted investment in stocks	$ 5,491,000		$ 5,436,000
Conversion factor per share		1.5342
Impairment charge of restricted investment	0
Investment in Federal Home Loan Bank Stock [Member]
Schedule of Investments [Line Items]
Restricted investment in stocks	3,101,000
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
Investment in National Energy Improvement Fund, LLC [Member]
Schedule of Investments [Line Items]
Restricted investment in stocks	$ 1,378,000
VISA Class B-2 Stock [Member]
Schedule of Investments [Line Items]
Restricted investment in stocks	$ 0
Number of shares owned | shares	3,251