REAL ESTATE OPERATIONS - Real Estate Operations Revenues (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenues
Revenue from contract with customer, including assessed tax	$ 6	$ 261	$ 87	$ 496
Subsurface Revenue	1	234	78	442
Impact Fee and Mitigation Credit Sales
Revenues
Revenue from contract with customer, including assessed tax			4
Fill Dirt and Other Revenue
Revenues
Revenue from contract with customer, including assessed tax	$ 5	$ 27	$ 5	$ 54