LEASES - As Lessee - Ground Lease and Office Lease (Details)	3 Months Ended
Mar. 31, 2022 USD ($) item	Mar. 31, 2021 USD ($)
Lessee Accounting
Operating lease liability	$ 7,140,000
Real Estate in Greensboro, NC
Lessee Accounting
Operating lease, option to extend	true
Operating lease, remaining lease term	12 years 10 months 24 days
Real Estate in Greensboro, NC \| Real estate expenses
Lessee Accounting
Operating lease expense	$ 150,000	$ 150,000
Real Estate in Greensboro, NC \| Five-Year Lease
Lessee Accounting
Operating lease, renewal term	5 years
Real Estate in Greensboro, NC \| Five-Year Lease \| Maximum
Lessee Accounting
Operating lease, number of renewal options \| item	4
Real Estate in Greensboro, NC \| Seven-Month Lease
Lessee Accounting
Operating lease, number of renewal options \| item	1
Operating lease, renewal term	7 months
Corporate office lease in Great Neck, NY
Lessee Accounting
Operating lease, option to extend	true
Operating lease, remaining lease term	14 years 9 months 18 days
Corporate office lease in Great Neck, NY \| General and administrative expense
Lessee Accounting
Operating lease expense	$ 14,000	$ 14,000
Corporate office lease in Great Neck, NY \| Five-Year Lease
Lessee Accounting
Operating lease, renewal term	5 years

The number of renewal options available to the Company, as defined in the lease agreement.

No definition available.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

Indicates (true false) whether lessee has option to extend operating lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918673-209980

+ Details

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- Definition

Remaining lease term of operating 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/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918673-209980

+ Details

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- Definition

Term of lessee's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918673-209980

+ Details

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- Definition

Amount of operating lease expense. Excludes sublease income.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 4
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123391704&loc=SL77918638-209977

+ Details

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Balance Type:	debit
Period Type:	duration

- Definition

Present value of lessee's discounted obligation for lease payments from operating lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123391704&loc=SL77918627-209977

+ Details

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