Note 1 - Summary of Significant Accounting Policies - Year-end Mortgage Loans Held for Sale (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Mortgage loans held for sale, net	$ 5,000,000	$ 1,100,000
Mortgage Loans [Member]
Mortgage loans held for sale	4,978,000	1,122,000
Less: Allowance to adjust to lower of cost or market	0	0
Mortgage loans held for sale, net	$ 4,978,000	$ 1,122,000

Amount, after allowance for bad debt, of loan receivables held-for-sale that are not part of a disposal group. Excludes loans and leases covered under loss sharing agreements and loans classified as debt securities.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=118952595&loc=d3e4428-111522

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant