Note 9 - Income Taxes (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%
Deferred Tax Liability Not Recognized, Amount of Unrecognized Deferred Tax Liability, Bad Debt Reserve for Tax Purposes of Qualified Lender	$ 4,609,000	$ 4,609,000
Unrecognized Tax Benefits	0	0
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit	0
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense	$ 0	$ 0
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member]
Open Tax Year	2020 2021 2022 2023
State and Local Jurisdiction [Member] | New Jersey Division of Taxation [Member]
Open Tax Year	2019 2020 2021 2022 2023