REDEEMABLE PREFERRED STOCK - Narrative (Details) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Class of Stock [Line Items]
Gross proceeds from issuance of preferred stock and warrants	$ 200,100,000
Net proceeds from issuance of preferred stock	8,942,000	$ 5,465,000
Issuance offering costs for preferred stock and warrants	16,600,000
Non-issuance offering costs for preferred stock and warrants	$ 8,200,000
Series A Preferred Warrants
Class of Stock [Line Items]
Warrants issued (in shares)	4,603,287
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
Warrants outstanding (in shares)	4,458,589
Number of securities called by warrants or rights (in shares)	1,156,393
Series A Preferred Stock
Class of Stock [Line Items]
Gross proceeds from issuance of preferred stock and warrants	$ 197,900,000
Issuance offering costs for preferred stock and warrants	16,400,000
Reclassification to deferred rent receivable and charges	$ 1,800,000
Preferred stock, shares outstanding (in shares)	8,245,566
Preferred stock, shares redeemed (in shares)	272,636
Series A Preferred Stock | Preferred Stock, Shares Issued, One
Class of Stock [Line Items]
Preferred stock, shares issued (in shares)	7,949,521
Series A Preferred Stock | Preferred Stock, Shares Issued, Two
Class of Stock [Line Items]
Preferred stock, shares issued (in shares)	568,681
Net proceeds from issuance of preferred stock	$ 0
Series D Preferred Stock
Class of Stock [Line Items]
Preferred stock, shares issued (in shares)	56,857		56,857
Gross proceeds from issuance of preferred stock and warrants	$ 1,400,000
Issuance offering costs for preferred stock and warrants	35,000
Reclassification to deferred rent receivable and charges	$ 13,000
Preferred stock, shares outstanding (in shares)	56,857		56,857
Preferred stock, shares redeemed (in shares)	0