Represents the area of land sold during the period.

No definition available.

Name:	cto_AreaOfLandSold
Namespace Prefix:	cto_
Data Type:	num:areaItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the after tax earnings per share relating to the disposal group.

+ References

No definition available.

+ Details

Name:	cto_DisposalGroupEarningsPerShareAfterTax
Namespace Prefix:	cto_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the exit cap rate relating to the disposal group.

+ References

No definition available.

+ Details

Name:	cto_DisposalGroupExitCapRate
Namespace Prefix:	cto_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the number of land sold.

+ References

No definition available.

+ Details

Name:	cto_InvestmentInJointVentureNumberOfLandSold
Namespace Prefix:	cto_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Mitigation Credits, Put Right, Fair Value

+ References

No definition available.

+ Details

Name:	cto_MitigationCreditsPutRightFairValue
Namespace Prefix:	cto_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Mitigation credits value per credit.

+ References

No definition available.

+ Details

Name:	cto_MitigationCreditsPutRightValuePerCredit
Namespace Prefix:	cto_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Number of mitigation credits.

+ References

No definition available.

+ Details

Name:	cto_NumberOfMitigationCredits
Namespace Prefix:	cto_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of purchase and sale agreements relating to potential land sales.

+ References

No definition available.

+ Details

Name:	cto_NumberOfPurchaseAndSaleAgreementsRelatingToPotentialLandSales
Namespace Prefix:	cto_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the number of transactions in which the land sales were made.

+ References

No definition available.

+ Details

Name:	cto_NumberOfTransactionsInWhichLandSalesWereMade
Namespace Prefix:	cto_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the percentage of contractual base rent abated during the period.

+ References

No definition available.

+ Details

Name:	cto_PercentageOfContractualBaseRentAbated
Namespace Prefix:	cto_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the percentage of contractual base rent deferred during the period.

+ References

No definition available.

+ Details

Name:	cto_PercentageOfContractualBaseRentDeferred
Namespace Prefix:	cto_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the percentage of contractual base rent for which the company has not yet reached an agreement.

+ References

No definition available.

+ Details

Name:	cto_PercentageOfContractualBaseRentForCompanyHasNotYetReachedAgreement
Namespace Prefix:	cto_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the percentage of contractual base rent received from tenants during the period.

+ References

No definition available.

+ Details

Name:	cto_PercentageOfContractualBaseRentReceived
Namespace Prefix:	cto_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the percentage of total remaining land.

+ References

No definition available.

+ Details

Name:	cto_PercentageOfTotalRemainingLand
Namespace Prefix:	cto_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of potential proceeds from sale of land in joint venture.

+ References

No definition available.

+ Details

Name:	cto_PotentialProceedsFromSaleOfLandInJointVenture
Namespace Prefix:	cto_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Area of land held.

+ References

No definition available.

+ Details

Name:	us-gaap_AreaOfLand
Namespace Prefix:	us-gaap_
Data Type:	num:areaItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation.

+ References

No definition available.

+ Details

Name:	us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount before tax of gain (loss) recognized on the sale or disposal of a disposal group. Excludes discontinued operations.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=109226348&loc=d3e2443-110228

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=109226691&loc=d3e2941-110230

+ Details

Name:	us-gaap_DisposalGroupNotDiscontinuedOperationGainLossOnDisposal
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Fair value portion of investments in an entity not consolidated. Includes, but is not limited to, investments in an entity that is affiliated with the reporting entity by means of direct or indirect ownership, an entity in which the reporting entity shares control of the entity with another party or group, an entity which the company has significant influence, but does not have control and subsidiaries that are not required to be consolidated and are accounted for using the equity or cost method.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

+ Details

Name:	us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVenturesFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The cash inflow from the sale of an investment interest in a joint venture that the reporting entity has not previously accounted for using consolidation or the equity method of accounting.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3179-108585

+ Details

Name:	us-gaap_ProceedsFromDivestitureOfInterestInJointVenture
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

Name:	us-gaap_SubsequentEventLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=cto_LandVentureMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DisposalGroupClassificationAxis=us-gaap_DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=cto_WawaDaytonaBeachFlMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=cto_CarrabbaSItalianGrillMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=cto_CommercialRealEstateSingleTenantMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

SUBSEQUENT EVENTS (Details)					1 Months Ended			3 Months Ended	6 Months Ended		10 Months Ended
SUBSEQUENT EVENTS (Details)	Aug. 07, 2020	Aug. 05, 2020 USD ($) $ / shares	Jul. 28, 2020 USD ($) a	Jul. 23, 2020 USD ($) $ / shares	Jul. 31, 2020 USD ($) a item	Mar. 31, 2020 USD ($) item	Dec. 31, 2019 USD ($) item	Jun. 30, 2020 USD ($)	Jun. 30, 2020 USD ($) $ / shares	Jun. 30, 2019 USD ($) $ / shares	Jul. 28, 2020 USD ($) a item
Subsequent Event [Line Items]
Percentage of contractual base rent received								81.00%
Percentage of contractual base rent deferred								9.00%
Percentage of contractual base rent abated								4.00%
Percentage of contractual base rent for which the company has not yet reached an agreement								6.00%
Number of mitigation credits \| item						20	25
Mitigation credits, Put Right, fair value						$ 1,500,000	$ 1,900,000
Mitigation credits value per credit						$ 75,000	$ 75,000
Land JV
Subsequent Event [Line Items]
Sales price									$ 97,000,000.0
Disposal Group, Disposed of by Sale, Not Discontinued Operations
Subsequent Event [Line Items]
Sales price								$ 39,339,138	$ 39,339,138	$ 79,870,000
Exit cap rate									4.30%	6.19%
Gain on Sale									$ 7,428,817	$ 18,681,864
Earning per share, after tax \| $ / shares									$ 1.20	$ 2.74
Wawa, Daytona Beach, FL [Member] \| Disposal Group, Disposed of by Sale, Not Discontinued Operations
Subsequent Event [Line Items]
Sales price				$ 7,100,000				$ 6,002,400	$ 6,002,400
Exit cap rate				4.90%					4.75%
Gain on Sale				$ 246,000					$ 1,768,603
Earning per share, after tax \| $ / shares				$ 0.04					$ 0.29
Subsequent Event
Subsequent Event [Line Items]
Percentage of contractual base rent received	87.00%
Percentage of contractual base rent deferred	6.00%
Percentage of contractual base rent abated	1.00%
Percentage of contractual base rent for which the company has not yet reached an agreement	6.00%
Number of mitigation credits \| item					19.745
Mitigation credits, Put Right, fair value					$ 1,480,000
Mitigation credits value per credit					$ 75,000
Subsequent Event \| Land JV
Subsequent Event [Line Items]
Number of land sales \| item					5
Area of land sold \| a					3,128						3,545
Sales price					$ 41,800,000						$ 64,100,000
Transaction \| a					12
Number of purchased sales \| item											8
Area of Land \| a			267								267
Proceeds from sale of land in joint venture			$ 31,000,000								$ 31,000,000
Percentage of total remaining land			15.00%
Total capital balance			$ 45,000,000								45,000,000
Investments in Affiliates, Subsidiaries, Associates, and Joint Ventures, Fair Value Disclosure			$ 45,000,000								$ 45,000,000
Subsequent Event \| Carrabba's Italian Grill \| Single-tenant
Subsequent Event [Line Items]
Sales price		$ 2,500,000
Exit cap rate		6.40%
Gain on Sale		$ 94,000
Earning per share, after tax \| $ / shares		$ (0.02)