Note 15 - Concentration of Cash Holdings	3 Months Ended
Mar. 31, 2021
Notes to Financial Statements
Cash and Cash Equivalents Disclosure [Text Block]	*Note 15:* Concentration of Cash Holdings** During the normal course of business, the Bank may have excess cash on deposit at other financial institutions. Each institution’s deposits are insured by the Federal Deposit Insurance Corporation (“FDIC”) up to $250,000. At March 31, 2021, the Bank had $81.0 million in deposits above FDIC insured limits. These funds are held with three institutions that are each shown to be well capitalized as of March 31, 2021. Additionally, the Bank held $127.3 million in deposits at the Federal Reserve Bank at March 31, 2021.

The entire disclosure for cash and cash equivalent footnotes, which may include the types of deposits and money market instruments, applicable carrying amounts, restricted amounts and compensating balance arrangements. Cash and equivalents include: (1) currency on hand (2) demand deposits with banks or financial institutions (3) other kinds of accounts that have the general characteristics of demand deposits (4) short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Generally, only investments maturing within three months from the date of acquisition qualify.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(1))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Name:	us-gaap_CashAndCashEquivalentsDisclosureTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration