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Note 5 - Loans Receivable and Credit Disclosures - Activity in Allowance for Loan Losses (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Balance, beginning | $ 12,619,000 | $ 11,684,000
Provision for loan losses | 5,680,656 | 1,314,104
Recoveries of loans charged-off | 325,000 | 72,000
Loans charged-off | (1,410,000) | (451,000)
Balance, ending | 17,215,000 | 12,619,000
Construction Real Estate [Member] |  |
Balance, beginning | 672,000 | 699,000
Provision for loan losses | 52,000 | (27,000)
Recoveries of loans charged-off | 1,000 | 0
Loans charged-off | 0 | 0
Balance, ending | 725,000 | 672,000
Family Residential Real Estate 1-4 [Member] |  |
Balance, beginning | 2,122,000 | 1,820,000
Provision for loan losses | 471,000 | 372,000
Recoveries of loans charged-off | 6,000 | 5,000
Loans charged-off | (18,000) | (75,000)
Balance, ending | 2,581,000 | 2,122,000
Commercial Real Estate Portfolio Segment [Member] |  |
Balance, beginning | 5,362,000 | 4,615,000
Provision for loan losses | 3,986,000 | 732,000
Recoveries of loans charged-off | 26,000 | 15,000
Loans charged-off | (444,000) | 0
Balance, ending | 8,930,000 | 5,362,000
Agriculture Real Estate [Member] |  |
Balance, beginning | 1,326,000 | 1,198,000
Provision for loan losses | 269,000 | 128,000
Recoveries of loans charged-off | 0 | 0
Loans charged-off | 0 | 0
Balance, ending | 1,595,000 | 1,326,000
Commercial Portfolio Segment [Member] |  |
Balance, beginning | 1,458,000 | 1,777,000
Provision for loan losses | 609,000 | (24,000)
Recoveries of loans charged-off | 14,000 | 36,000
Loans charged-off | (628,000) | (331,000)
Balance, ending | 1,453,000 | 1,458,000
Agriculture [Member] |  |
Balance, beginning | 1,478,000 | 1,384,000
Provision for loan losses | 266,000 | 94,000
Recoveries of loans charged-off | 0 | 0
Loans charged-off | (48,000) | 0
Balance, ending | 1,696,000 | 1,478,000
Consumer and Other [Member] |  |
Balance, beginning | 201,000 | 191,000
Provision for loan losses | 28,000 | 39,000
Recoveries of loans charged-off | 278,000 | 16,000
Loans charged-off | (272,000) | (45,000)
Balance, ending | $ 235,000 | $ 201,000

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- Definition Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(4) -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524 + Details
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- Definition Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524 + Details
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- Definition Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(1)(ii) -URI http://asc.fasb.org/extlink&oid=121614798&loc=d3e15032-111544 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SAB Topic 6.L.1) -URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74567-122707 + Details
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- Definition Amount of expense related to estimated loss from loan and lease transactions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.11) -URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524 + Details
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