REVENUE RECOGNITION - Timing of Revenue Recognition (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Revenues
Revenue from contract with customer, including assessed tax				$ 24,498,000
Over Lease Term	$ 10,442,000	$ 9,642,000	$ 31,959,000	28,977,000
Commercial Loan Investment Related Revenue	855,000	41,000	908,000	616,000
Total Revenues	11,748,131	17,413,926	43,946,281	53,461,436
Asset/Good Transferred at a Point in Time
Revenues
Revenue from contract with customer, including assessed tax	428,000	7,659,000	11,007,000	23,723,000
Services Transferred Over Time
Revenues
Revenue from contract with customer, including assessed tax	23,000	72,000	72,000	145,000
Income Properties
Revenues
Over Lease Term	10,238,000	9,288,000	31,289,000	28,202,000
Total Revenues	10,260,831	9,360,155	31,360,544	28,347,181
Income Properties | Services Transferred Over Time
Revenues
Revenue from contract with customer, including assessed tax	23,000	72,000	72,000	145,000
Interest Income from Commercial Loan Investments
Revenues
Commercial Loan Investment Related Revenue	855,000	41,000	908,000	616,000
Total Revenues	855,559	41,262	908,324	615,728
Real Estate Operations
Revenues
Revenue from contract with customer, including assessed tax	632,000	8,013,000	11,677,000
Over Lease Term	204,000	354,000	670,000	775,000
Total Revenues	631,741	8,012,509	11,677,413	24,498,527
Real Estate Operations | Asset/Good Transferred at a Point in Time
Revenues
Revenue from contract with customer, including assessed tax	$ 428,000	$ 7,659,000	$ 11,007,000	$ 23,723,000