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LEASES - Additional information (Details) $ in Thousands |  |  | 3 Months Ended | 7 Months Ended | 9 Months Ended | 10 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Nov. 01, 2020 $ / ft² | Oct. 20, 2019 $ / ft² | Sep. 30, 2019 USD ($) | Sep. 30, 2018 USD ($) | Sep. 30, 2019 USD ($) $ / ft² | Sep. 30, 2019 USD ($) | Sep. 30, 2018 USD ($) | Oct. 31, 2020 $ / ft² | Oct. 19, 2019 $ / ft² | Oct. 19, 2018 $ / ft² | Jun. 01, 2019 USD ($) | Mar. 11, 2019 a | Dec. 31, 2018 USD ($) | Oct. 20, 2017 USD ($) a
Lessee, Lease, Description [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Land Subject to Ground Leases | a |  |  |  |  |  |  |  |  |  |  |  | 21,420 |  | 41,715
Option to extend (in years) |  |  |  |  |  |  |  |  |  |  |  | 2 years |  | 2 years
Rent per square foot | $ / ft² |  |  |  |  | 10.00 |  |  | 20.75 | 19.75 | 7.50 |  |  |  |
Additional rent per square foot | $ / ft² | 1.00 | 1.00 |  |  |  |  |  |  |  |  |  |  |  |
Tenant Improvements |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 200
Operating lease liabilities |  |  | $ 4,704 |  | $ 4,704 | $ 4,704 |  |  |  |  | $ 1,600 |  |  |
Operating lease asset |  |  | 4,078 |  | 4,078 | 4,078 |  |  |  |  | $ 1,600 |  | $ 3,050 |
Finance Lease, Right-of-Use Asset |  |  | 195 |  | 195 | 195 |  |  |  |  |  |  | $ 19 |
Finance Lease, Liability |  |  | $ 199 |  | $ 199 | $ 199 |  |  |  |  |  |  |  |
Lessee, Operating Lease, Term of Contract |  |  | 5 years |  | 5 years | 5 years |  |  |  |  |  |  |  |
Lessee, Operating Lease, Discount Rate |  |  | 4.80% |  | 4.80% | 4.80% |  |  |  |  |  |  |  |
Lessee, Finance Lease, Discount Rate |  |  | 8.30% |  | 8.30% | 8.30% |  |  |  |  |  |  |  |
Operating Lease, Weighted Average Remaining Lease Term |  |  | 4 years |  | 4 years | 4 years |  |  |  |  |  |  |  |
Finance Lease, Weighted Average Remaining Lease Term |  |  | 5 years |  | 5 years | 5 years |  |  |  |  |  |  |  |
General and Administrative Expense [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating Lease, Cost |  |  | $ 400 | $ 200 |  | $ 800 | $ 700 |  |  |  |  |  |  |

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- Definition Weighted average remaining lease term for finance lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (g)(3) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI http://asc.fasb.org/extlink&oid=77888399&loc=SL77918982-209971 + Details
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- Definition Discount rate used by lessee to determine present value of operating lease payments. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918673-209980 + Details
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- Definition Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI http://asc.fasb.org/extlink&oid=77888399&loc=SL77918982-209971 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980 + Details
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