Note 1 - Summary of Significant Accounting Policies (Details Textual) - Unfunded Loan Commitment [Member]	Dec. 31, 2022
Minimum [Member]
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent	0.25%
Maximum [Member]
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent	0.50%

Percentage of allowance for credit loss to total financing receivable outstanding.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher SEC
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph (a)
-Subparagraph (1)

Name:	srt_FinancingReceivableAllowanceForCreditLossToOutstandingPercent
Namespace Prefix:	srt_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant