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Note 4 - Loan Receivables and Allowance for Loan and Lease Losses - Allowance for Loan Losses (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Balance	$ 10,584,000	$ 10,115,000	$ 7,609,000
Charge-offs	(358,000)	(1,778,000)	(2,659,000)
Recoveries	179,000	77,000	194,000
Provisions (credits)	(500,000)	2,170,000	4,971,000
Balance	9,905,000	10,584,000	10,115,000
Allowance for loan losses: Collectively evaluated for impairment	7,000
Loans receivable, gross: Collectively evaluated for impairment	590,000
Total loans receivable, gross	739,488,000	730,180,000
Business Activities Loans [Member]
Balance	10,584,000
Balance	9,905,000	10,584,000
Allowance for loan losses: Individually evaluated for impairment	2,292,000	1,412,000
Allowance for loan losses: Collectively evaluated for impairment	7,613,000	9,172,000
Loans receivable, gross: Individually evaluated for impairment	23,212,000	24,383,000
Loans receivable, gross: Collectively evaluated for impairment	716,276,000	705,797,000
Total loans receivable, gross	739,488,000	730,180,000
Commercial Real Estate Portfolio Segment [Member]
Balance	4,485,000	3,789,000	1,866,000
Charge-offs	(51,000)	(1,032,000)	0
Recoveries	0	0	2,000
Provisions (credits)	629,000	1,728,000	1,921,000
Balance	5,063,000	4,485,000	3,789,000
Total loans receivable, gross	365,247,000	282,378,000
Commercial Real Estate Portfolio Segment [Member] | Business Activities Loans [Member]
Balance	4,485,000
Balance	5,063,000	4,485,000
Allowance for loan losses: Individually evaluated for impairment	1,567,000	1,398,000
Allowance for loan losses: Collectively evaluated for impairment	3,496,000	3,087,000
Loans receivable, gross: Individually evaluated for impairment	15,704,000	14,534,000
Loans receivable, gross: Collectively evaluated for impairment	349,543,000	267,844,000
Total loans receivable, gross	365,247,000	282,378,000
Residential Portfolio Segment [Member]
Balance	1,379,000	1,038,000	1,059,000
Charge-offs	(3,000)	(24,000)	(118,000)
Recoveries	3,000	1,000	10,000
Provisions (credits)	321,000	364,000	87,000
Balance	1,700,000	1,379,000	1,038,000
Total loans receivable, gross	158,591,000	153,851,000
Residential Portfolio Segment [Member] | Business Activities Loans [Member]
Balance	1,379,000
Balance	1,700,000	1,379,000
Allowance for loan losses: Individually evaluated for impairment	3,000	4,000
Allowance for loan losses: Collectively evaluated for impairment	1,697,000	1,375,000
Loans receivable, gross: Individually evaluated for impairment	2,954,000	3,962,000
Loans receivable, gross: Collectively evaluated for impairment	155,637,000	149,889,000
Total loans receivable, gross	158,591,000	153,851,000
Commercial Portfolio Segment [Member]
Balance	3,284,000	4,340,000	3,558,000
Charge-offs	(212,000)	(677,000)	(2,418,000)
Recoveries	65,000	70,000	172,000
Provisions (credits)	(605,000)	(449,000)	3,028,000
Balance	2,532,000	3,284,000	4,340,000
Total loans receivable, gross	122,810,000	144,297,000
Commercial Portfolio Segment [Member] | Business Activities Loans [Member]
Balance	3,284,000
Balance	2,532,000	3,284,000
Allowance for loan losses: Individually evaluated for impairment	722,000	0
Allowance for loan losses: Collectively evaluated for impairment	1,810,000	3,284,000
Loans receivable, gross: Individually evaluated for impairment	4,031,000	4,700,000
Loans receivable, gross: Collectively evaluated for impairment	118,779,000	139,597,000
Total loans receivable, gross	122,810,000	144,297,000
Consumer Portfolio Segment [Member]
Balance	295,000	341,000	641,000
Charge-offs	(23,000)	(45,000)	(123,000)
Recoveries	111,000	6,000	10,000
Provisions (credits)	(130,000)	(7,000)	(187,000)
Balance	253,000	295,000	341,000
Total loans receivable, gross	59,364,000	67,635,000
Consumer Portfolio Segment [Member] | Business Activities Loans [Member]
Balance	295,000
Balance	253,000	295,000
Allowance for loan losses: Individually evaluated for impairment	0	10,000
Allowance for loan losses: Collectively evaluated for impairment	253,000	285,000
Loans receivable, gross: Individually evaluated for impairment	523,000	1,187,000
Loans receivable, gross: Collectively evaluated for impairment	58,841,000	66,448,000
Total loans receivable, gross	59,364,000	67,635,000
Construction Portfolio Segment [Member]
Balance	739,000	477,000	350,000
Charge-offs	(69,000)	0	0
Recoveries	0	0
Provisions (credits)	(592,000)	262,000	127,000
Balance	78,000	739,000	477,000
Total loans receivable, gross	21,781,000	66,984,000
Construction Portfolio Segment [Member] | Business Activities Loans [Member]
Balance	739,000
Balance	78,000	739,000
Allowance for loan losses: Individually evaluated for impairment	0	0
Allowance for loan losses: Collectively evaluated for impairment	78,000	739,000
Loans receivable, gross: Individually evaluated for impairment	0	0
Loans receivable, gross: Collectively evaluated for impairment	21,781,000	66,984,000
Total loans receivable, gross	21,781,000	66,984,000
Construction to Permanent Portfolio Segment [Member]
Balance	162,000	130,000	108,000
Charge-offs	0	0	0
Recoveries	0	0	0
Provisions (credits)	(121,000)	32,000	22,000
Balance	41,000	162,000	130,000
Total loans receivable, gross	11,695,000	15,035,000
Construction to Permanent Portfolio Segment [Member] | Business Activities Loans [Member]
Balance	162,000
Balance	41,000	162,000
Allowance for loan losses: Individually evaluated for impairment	0	0
Allowance for loan losses: Collectively evaluated for impairment	41,000	162,000
Loans receivable, gross: Individually evaluated for impairment	0	0
Loans receivable, gross: Collectively evaluated for impairment	11,695,000	15,035,000
Total loans receivable, gross	11,695,000	15,035,000
Unallocated Financing Receivables [Member]
Balance	240,000	0	27,000
Charge-offs	0	0	0
Recoveries	0	0	0
Provisions (credits)	(2,000)	240,000	(27,000)
Balance	238,000	240,000	$ 0
Unallocated Financing Receivables [Member] | Business Activities Loans [Member]
Balance	240,000
Balance	238,000	240,000
Allowance for loan losses: Individually evaluated for impairment	0	0
Allowance for loan losses: Collectively evaluated for impairment	238,000	240,000
Loans receivable, gross: Individually evaluated for impairment	0	0
Loans receivable, gross: Collectively evaluated for impairment	0	0
Total loans receivable, gross	$ 0	$ 0

X

- Definition

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

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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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