Note 11 - Commitments and Contingencies (Details Textual) - Aquana, LLC [Member] - USD ($) $ in Thousands	1 Months Ended
Jul. 31, 2021	Mar. 31, 2024
Business Combination, Contingent Consideration, Earn Out Period (Year)	6 years
Business Combination, Required Continued Employment of Key Employees, Period (Year)	4 years
Business Combination, Contingent Consideration, Liability, Total		$ 0

Amount of liability recognized arising from contingent consideration in a business combination.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
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-Section 50
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant