LAND AND INVESTMENT IN THE LAND JV - Real Estate Operations Revenues (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues
Revenue from contract with customer, including assessed tax									$ 852,000	$ 2,966,000	$ 5,191,000
Subsurface Revenue									748,000	1,625,000	3,048,000
Total Revenues	$ 11,963,117	$ 11,329,979	$ 10,688,831	$ 10,959,319	$ 12,040,174	$ 10,443,476	$ 10,805,062	$ 10,369,176	44,941,246	43,657,888	38,650,570
Real Estate Operations
Revenues
Total Revenues	$ 143,003	$ 213,589	$ 260,771	$ 234,901	$ 311,624	$ 1,042,059	$ 750,296	$ 862,450	852,264	2,966,429	5,190,951
Impact Fee and Mitigation Credit Sales
Revenues
Revenue from contract with customer, including assessed tax										1,338,000	2,126,000
Impact Fee and Mitigation Credit Sales | Real Estate Operations
Revenues
Revenue from contract with customer, including assessed tax										1,338,000	2,126,000
Fill Dirt and Other Revenue
Revenues
Revenue from contract with customer, including assessed tax									104,000	3,000	17,000
Fill Dirt and Other Revenue | Real Estate Operations
Revenues
Revenue from contract with customer, including assessed tax									104,000	3,000	17,000
Discontinued Operations
Revenues
Revenue from contract with customer, including assessed tax									11,043,000	43,031,000	47,666,000
Discontinued Operations | Land
Revenues
Revenue from contract with customer, including assessed tax									10,975,000	41,452,000	45,471,000
Discontinued Operations | Revenue from Reimbursement of Infrastructure Costs
Revenues
Revenue from contract with customer, including assessed tax										1,556,000	1,860,000
Discontinued Operations | Agriculture
Revenues
Revenue from contract with customer, including assessed tax										$ 23,000	$ 335,000
Discontinued Operations | Agriculture | Real Estate Operations
Revenues
Revenue from contract with customer, including assessed tax									$ 68,000