Tangible Water Assets and Real Estate, Net (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Real Estate [Abstract]
Real estate and improvements held and used, net of accumulated depreciation of $12,003 at each of September 30, 2020 and December 31, 2019	$ 9,469	$ 9,469
Other real estate inventories	3,359	3,359
Tangible water assets	26,552	26,570
Total real estate and tangible water assets	39,380	39,398
Accumulated depreciation on real estate and improvements held and used	$ 12,003	$ 12,003