REDEEMABLE PREFERRED STOCK - Series A1 and Series A Preferred Stock Narrative (Details) - USD ($)	12 Months Ended		87 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Jan. 31, 2020
Class of Stock [Line Items]
Non-issuance offering costs for preferred stock and warrants	$ 10,400,000
Warrant right to purchase a share of common stock (in shares)				0.25
Net proceeds from issuance of preferred stock	103,228,000	$ 148,007,000
Redeemable preferred stock deemed dividends	0	19,000
Reclassification of Series A Preferred Stock to permanent equity	15,616,000	$ 37,766,000
Series A Preferred Warrants
Class of Stock [Line Items]
Gross proceeds from issuance of preferred stock and warrants	761,000
Issuance offering costs for preferred stock and warrants	142,000
Reclassification to deferred rent receivable and charges	$ 5,000
Number of warrants included in preferred stock unit (in shares)				1
Warrants issued (in shares)	4,603,287		4,603,287
Series A1 Preferred Stock
Class of Stock [Line Items]
Preferred stock, par value (in usd per share)	$ 0.001	$ 0.001	$ 0.001
Preferred stock, liquidation preference per share (in usd per share)	$ 25.00	$ 25.00	$ 25.00
Preferred stock, shares issued (in shares)	10,473,369	5,966,077	10,473,369
Issuance offering costs for preferred stock and warrants	$ 18,600,000
Reclassification to deferred rent receivable and charges	$ 3,500,000
Preferred stock, shares outstanding (in shares)	10,378,343	5,956,147	10,378,343
Preferred stock, shares redeemed (in shares)	95,026
Series A1 Preferred Stock | Preferred Stock, Shares Issued, One
Class of Stock [Line Items]
Preferred stock, shares issued (in shares)	10,273,369		10,273,369
Gross proceeds from issuance of preferred stock and warrants	$ 254,300,000
Series A1 Preferred Stock | Preferred Stock, Shares Issued, Two
Class of Stock [Line Items]
Preferred stock, shares issued (in shares)	200,000		200,000
Series A Preferred Stock
Class of Stock [Line Items]
Preferred stock, par value (in usd per share)	$ 0.001	$ 0.001	$ 0.001
Preferred stock, liquidation preference per share (in usd per share)	$ 25.00	$ 25.00	$ 25.00
Preferred stock, shares issued (in shares)	8,820,338	8,126,597	8,820,338
Gross proceeds from issuance of preferred stock and warrants	$ 205,400,000
Issuance offering costs for preferred stock and warrants	17,000,000
Reclassification to deferred rent receivable and charges	$ 1,900,000
Preferred stock, shares outstanding (in shares)	7,431,839	7,565,349	7,431,839
Preferred stock, shares redeemed (in shares)	1,388,499
Redeemable preferred stock deemed dividends	$ 0	$ 19,000
Reclassification of Series A Preferred Stock to permanent equity	$ 15,616,000	$ 37,766,000	$ 199,600,000
Series A Preferred Stock | Preferred Stock, Shares Issued, One
Class of Stock [Line Items]
Preferred stock, shares issued (in shares)	8,251,657		8,251,657
Series A Preferred Stock | Preferred Stock, Shares Issued, Two
Class of Stock [Line Items]
Preferred stock, shares issued (in shares)	568,681		568,681
Net proceeds from issuance of preferred stock	$ 0