REVENUE RECOGNITION - Major Good or Service (Details) - USD ($)	3 Months Ended	6 Months Ended
Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenues
Lease Revenue	$ 9,774,000		$ 19,927,000
Lease Incentive Amortization	(76,000)	$ (76,000)	(151,000)	$ (151,000)
Interest from Commercial Loan Investments	$ 53,000	274,000	53,000	575,000
Revenue from contract with customer, including assessed tax				16,485,000
Type of revenue	cto:ImpactFeeAndMitigationCreditSalesMember
Interest and Other Revenue	$ 19,000	45,000	49,000	73,000
Total Revenues	17,938,831	12,550,267	32,198,150	36,047,510
Lease Revenue - Base Rent
Revenues
Lease Revenue	8,667,000	7,376,000	17,569,000	14,809,000
Lease Revenue - CAM
Revenues
Lease Revenue	471,000	891,000	1,141,000	1,505,000
Lease Revenue - Reimbursements
Revenues
Lease Revenue	543,000	801,000	1,088,000	1,365,000
Lease Revenue - Billboards
Revenues
Lease Revenue	93,000	70,000	129,000	134,000
Above / Below Market Lease Accretion
Revenues
Lease Revenue	623,000	600,000	1,204,000	1,179,000
Contributed Leased Assets Accretion
Revenues
Lease Revenue	62,000	85,000	124,000	95,000
Land
Revenues
Revenue from contract with customer, including assessed tax	7,250,000	1,734,000	10,550,000	14,851,000
Impact Fee and Mitigation Credit Sales
Revenues
Revenue from contract with customer, including assessed tax		470,000		586,000
Subsurface Lease Revenue
Revenues
Revenue from contract with customer, including assessed tax	214,000	201,000	413,000	400,000
Subsurface Revenue - Other
Revenues
Revenue from contract with customer, including assessed tax	20,000	79,000	29,000	626,000
Income Properties
Revenues
Lease Incentive Amortization	(76,000)	(76,000)	(151,000)	(151,000)
Interest and Other Revenue	19,000	45,000	49,000	73,000
Total Revenues	10,375,295	9,781,299	21,099,713	18,987,026
Income Properties \| Lease Revenue - Base Rent
Revenues
Lease Revenue	8,640,000	7,365,000	17,515,000	14,787,000
Income Properties \| Lease Revenue - CAM
Revenues
Lease Revenue	471,000	891,000	1,141,000	1,505,000
Income Properties \| Lease Revenue - Reimbursements
Revenues
Lease Revenue	543,000	801,000	1,088,000	1,365,000
Income Properties \| Lease Revenue - Billboards
Revenues
Lease Revenue	93,000	70,000	129,000	134,000
Income Properties \| Above / Below Market Lease Accretion
Revenues
Lease Revenue	623,000	600,000	1,204,000	1,179,000
Income Properties \| Contributed Leased Assets Accretion
Revenues
Lease Revenue	62,000	85,000	124,000	95,000
Commercial Loan Investments
Revenues
Interest from Commercial Loan Investments	53,000	274,000	53,000	575,000
Total Revenues	52,765	273,467	52,765	574,466
Real Estate Operations
Revenues
Revenue from contract with customer, including assessed tax	7,511,000	2,495,000	11,046,000
Total Revenues	7,510,771	2,495,501	11,045,672	16,486,018
Real Estate Operations \| Lease Revenue - Base Rent
Revenues
Lease Revenue	27,000	11,000	54,000	22,000
Real Estate Operations \| Land
Revenues
Revenue from contract with customer, including assessed tax	7,250,000	1,734,000	10,550,000	14,851,000
Real Estate Operations \| Impact Fee and Mitigation Credit Sales
Revenues
Revenue from contract with customer, including assessed tax		470,000	0	586,000
Real Estate Operations \| Subsurface Lease Revenue
Revenues
Revenue from contract with customer, including assessed tax	214,000	201,000	413,000	400,000
Real Estate Operations \| Subsurface Revenue - Other
Revenues
Revenue from contract with customer, including assessed tax	$ 20,000	$ 79,000	$ 29,000	$ 626,000

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Amount of amortization of lease incentive costs incurred by the lessor for the benefit of the lessee.

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Interest and fee income related to commercial loans including industrial and agricultural, real estate (commercial and residential, construction and development), trade financing, and lease financing.

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Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

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