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Note 14 - Discontinued Operations (Details Textual) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended 6 Months Ended
May 31, 2021
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Proceeds from Sale of Productive Assets, Total       $ 0 $ 4,203
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent, Total   $ 0 $ (69) 0 $ (209)
PUC-regulated Assets of Kapalua Water Company, Ltd and Kapalua Waste Treatment Company, Ltd [Member]          
Proceeds from Sale of Productive Assets, Total $ 4,200        
PUC-regulated Assets of Kapalua Water Company, Ltd and Kapalua Waste Treatment Company, Ltd [Member] | Discontinued Operations, Disposed of by Sale [Member]          
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent, Total       $ (200)