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Note 16 - Business Segments (Details Textual) $ in Thousands	3 Months Ended		7 Months Ended	9 Months Ended
	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Oct. 26, 2019 USD ($)	Dec. 31, 2020 USD ($) Boe	Dec. 31, 2019 USD ($)
Number of Reportable Segments				2
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability	$ 2,740			$ 2,740
Share-based Payment Arrangement, Expense	839	590		2,597	1,236
Corporate, Non-Segment [Member]
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability	2,700			2,700
Share-based Payment Arrangement, Expense	$ 800	$ 600		$ 2,600	$ 1,200
Minimum [Member]
Number of Reportable Segments (Barrel of Oil Equivalent) | Boe				2

X

- Definition

Represents the power of wind turbines, expressed in megawatts.

+ References

No definition available.

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- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Amount of increase (decrease) in the value of a contingent consideration liability, including, but not limited to, differences arising upon settlement.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

+ References

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