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REVENUES - Contract Balances (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Contract with Customer, Asset, after Allowance for Credit Loss [Abstract]
Contract assets	$ 284,000	$ 289,000
2020	(236,000)
2021	(44,000)
2023	(4,000)
Contract with Customer, Liability [Abstract]
Contract liability	158,000	$ 265,000
2020	(53,000)
2021	(53,000)
2022	$ (52,000)
Lease commission recognized upon tenant opening (as a percent)	50.00%

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- Definition

Contract with customer, liability, expected revenue recognized, next twelve year

+ References

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- Definition

Contract with Customer, Liability, Expected Revenue Recognized, Year Three

+ References

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- Definition

Contract with Customer, Liability, Expected Revenue Recognized, Year Two

+ References

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- Definition

Contract with Customer, Asset, Amortization Expense, Remainder of Fiscal Year

+ References

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- Definition

Contract with Customer, Asset, Amortization Expense, Year Four

+ References

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- Definition

Contract with Customer, Asset, Amortization Expense, Year Two

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- Definition

Revenue, Performance Obligation, Lease Commission Recognized Upon Tenant Opening, Percentage

+ References

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- Definition

Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130549-203045

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=118944033&loc=SL49130531-203044

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=118944033&loc=SL49130533-203044

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- Definition

Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=118944033&loc=SL49130531-203044

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130549-203045

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=118944033&loc=SL49130532-203044

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