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Note 8 - Loans Receivable and Credit Disclosures - Activity in Allowance for Loan Losses (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Balance	$ 16,005,000	$ 11,869,000	$ 12,619,000	$ 11,684,000
Provision for loan losses	541,844	378,789	4,424,475	545,203
Recoveries of loans charged-off	284,000	12,000	299,000	59,000
Loans charged-off	(899,000)	(326,000)	(1,410,000)	(354,000)
Balance	15,932,000	11,934,000	15,932,000	11,934,000
Construction Real Estate [Member]
Balance	849,000	721,000	672,000	699,000
Provision for loan losses	(105,000)	41,000	71,000	63,000
Recoveries of loans charged-off	0	0	1,000	0
Loans charged-off	0	0	0	0
Balance	744,000	762,000	744,000	762,000
Family Residential Real Estate 1-4 [Member]
Balance	2,505,000	1,847,000	2,122,000	1,820,000
Provision for loan losses	80,000	237,000	477,000	265,000
Recoveries of loans charged-off	2,000	2,000	5,000	4,000
Loans charged-off	(1,000)	0	(18,000)	(3,000)
Balance	2,586,000	2,086,000	2,586,000	2,086,000
Commercial Real Estate Portfolio Segment [Member]
Balance	6,864,000	4,906,000	5,362,000	4,615,000
Provision for loan losses	583,000	158,000	2,527,000	437,000
Recoveries of loans charged-off	1,000	3,000	3,000	15,000
Loans charged-off	0	0	(444,000)	0
Balance	7,448,000	5,067,000	7,448,000	5,067,000
Agriculture Real Estate [Member]
Balance	1,713,000	1,301,000	1,326,000	1,198,000
Provision for loan losses	(15,000)	9,000	372,000	112,000
Recoveries of loans charged-off	0	0	0	0
Loans charged-off	0	0	0	0
Balance	1,698,000	1,310,000	1,698,000	1,310,000
Commercial Portfolio Segment [Member]
Balance	1,994,000	1,590,000	1,458,000	1,777,000
Provision for loan losses	(5,000)	(112,000)	573,000	(324,000)
Recoveries of loans charged-off	9,000	5,000	13,000	34,000
Loans charged-off	(582,000)	(326,000)	(628,000)	(330,000)
Balance	1,416,000	1,157,000	1,416,000	1,157,000
Agriculture [Member]
Balance	1,830,000	1,332,000	1,478,000	1,384,000
Provision for loan losses	(14,000)	10,000	338,000	(42,000)
Recoveries of loans charged-off	0	0	0	0
Loans charged-off	(48,000)	0	(48,000)	0
Balance	1,768,000	1,342,000	1,768,000	1,342,000
Consumer and Other [Member]
Balance	250,000	172,000	201,000	191,000
Provision for loan losses	18,000	36,000	66,000	34,000
Recoveries of loans charged-off	272,000	2,000	277,000	6,000
Loans charged-off	(268,000)	0	(272,000)	(21,000)
Balance	$ 272,000	$ 210,000	$ 272,000	$ 210,000

X

- Definition

Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
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Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss.

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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.

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