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Note 12 - Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2022

Notes Tables

Schedule of Asset Retirement Obligations [Table Text Block]

		For the Year Ended December 31,
		2022				2021
Asset Retirement Obligations at start of period		$	42			$	41
Liabilities incurred in the current period			1				—
Liabilities settled in the current period			(2	)			—
Revision in estimated cash flows			2				1
Asset Retirement Obligations at end of period		$	43			$	42

X

- Definition

Tabular disclosure of the carrying amount of a liability for asset retirement obligations.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 410
-SubTopic 20
-Section 50
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849

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Namespace Prefix:	us-gaap_
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Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

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