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Note 12 - Leases - Lease Cost and Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating lease cost	$ 571,000	$ 565,000	$ 517,000
Short-term lease cost	12,000	18,000	119,000
Total lease cost	583,000	583,000	636,000
Operating cash flows from operating leases	$ 552,000	$ 543,000	$ 459,000
Weighted -average remaining lease term - operating leases (in years) (Year)	8 years	9 years
Weighted -average discount rate - operating leases	3.30%	3.48%

X

- Definition

Amount of lease cost recognized by lessee for lease contract.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
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X

- Definition

Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability.

+ References

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-Publisher FASB
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X

- Definition

Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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X

- Definition

Weighted average discount rate for operating lease calculated at point in time.

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-Publisher FASB
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X

- Definition

Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

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X

- Definition

Amount of short-term lease cost, excluding expense for lease with term of one month or less.

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