Tangible Water Assets and Real Estate, Net (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Real Estate [Abstract]
Real estate and improvements held and used, net of accumulated depreciation of $12,003 at each of March 31, 2021 and December 31, 2020	$ 9,469	$ 9,469
Other real estate inventories	3,359	3,359
Tangible water assets	26,546	26,546
Total real estate and tangible water assets	39,374	39,374
Accumulated depreciation on real estate and improvements held and used	$ 12,003	$ 12,003