Long-Term Water Assets - Revenues and Cost of Sales (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2020 USD ($) acre ft	Jun. 30, 2019 USD ($) acre ft
Goodwill and Intangible Assets Disclosure [Abstract]
Acre-Feet Sold (in acre-feet) | acre ft	4,625	4,445
Revenues	$ 5,471	$ 3,980
Cost of sales	3,264	3,194
Profit	$ 2,207	$ 786