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Inventories (Details) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Inventories [Abstract]    
Natural gas $ 763 $ 1,052
Renewable credits 12,504 14,940
Solar Panels:    
Finished goods 1,219 424
Raw materials 216 216
Total solar panels inventory 1,435 640
Totals $ 14,702 $ 16,632