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Note 4 - Leases (Tables)

12 Months Ended

Dec. 31, 2021

Notes Tables

Lease, Cost [Table Text Block]

		December 31, 2021
Weighted average remaining lease term (years)			5.07
Weighted average discount rate			1.97	%

		Year ended December 31,
		2020				2021
Operating lease cost		$	2,587			$	3,085
Cash payments for operating leases		$	2,975			$	3,175

Lessee, Operating Lease, Liability, Maturity [Table Text Block]

2022			3,466
2023			1,416
2024			794
2025			814
2026 and thereafter			2,365
Total undiscounted cash flows			8,855
Less imputed interest			451
Present value of lease liabilities		$	8,404

X

- Definition

Tabular disclosure of lessee's lease cost. Includes, but is not limited to, interest expense for finance lease, amortization of right-of-use asset for finance lease, operating lease cost, short-term lease cost, variable lease cost and sublease income.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918686-209980

+ Details

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Period Type:	duration

X

- Definition

Tabular disclosure of undiscounted cash flows of lessee's operating lease liability. Includes, but is not limited to, reconciliation of undiscounted cash flows to operating lease liability recognized in statement of financial position.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918701-209980

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_TableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration