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Note 2 - Bank Acquisition - Consideration Transferred and Assets Acquired and Liabilities Assumed (Details) - USD ($) | Oct. 25, 2019 | Mar. 31, 2020 | Dec. 31, 2019
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Recognized amounts of identifiable assets acquired and liabilities assumed: |  |  |
Goodwill |  | $ 12,424,434 | $ 12,114,559
Iowa State Savings Bank [Member] |  |  |
Payments to Acquire Businesses, Gross | $ 22,643,000 |  |
Recognized amounts of identifiable assets acquired and liabilities assumed: |  |  |
Cash and due from banks | 3,188,000 |  |
Federal funds sold | 2,792,000 |  |
Interest bearing deposits in financial institutions | 21,035,000 |  |
Securities available-for-sale | 33,615,000 |  |
Federal Home Loan Bank stock at cost | 365,000 |  |
Loans receivable | 137,776,000 |  |
Accrued interest receivable | 2,888,000 |  |
Bank premises and equipment | 2,452,000 |  |
Other real estate owned | 3,582,000 |  |
Bank owned life insurance | 2,499,000 |  |
Core deposit intangible asset | 1,891,000 |  |
Other assets | 204,000 |  |
Deposits | (188,631,000) |  |
Securities sold under repurchase agreements | (1,747,000) |  |
Accrued interest payable and other liabilities | (1,946,000) |  |
Total identifiable net assets | 19,963,000 |  |
Goodwill | $ 2,680,000 |  |

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- Definition Interest earned but not received, acquired at the acquisition date. + References No definition available. + Details
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- Definition Amount of FHLB stock acquired at the acquisition date. + References No definition available. + Details
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- Definition The amount outstanding of funds lent to other depository institutions, securities brokers, or securities dealers in the form of Federal Funds sold, acquired at the acquisition date. + References No definition available. + Details
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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions, acquired at the acquisition date. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121647850&loc=d3e4845-128472 + Details
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- Definition Amount of investments in debt and equity securities, including, but not limited to, held-to-maturity, trading and available-for-sale expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer, acquired at the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121647850&loc=d3e4845-128472 + Details
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- Definition Amount of other assets expected to be realized or consumed after one year or the normal operating cycle, if longer, acquired at the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121647850&loc=d3e4845-128472 + Details
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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(10)(1)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=120320667&loc=SL49117168-202975 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266 + Details
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