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REDEEMABLE PREFERRED STOCK - Narrative (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Jan. 31, 2020
Class of Stock [Line Items] |  |  |
Gross proceeds from issuance of preferred stock and warrants | $ 190,300,000 |  |
Net proceeds from issuance of Preferred Stock | 29,829,000 | $ 41,958,000 |
Issuance offering costs for preferred stock and warrants | 15,900,000 |  |
Non-issuance offering costs for preferred stock and warrants | $ 8,000,000 |  |
Registration Statement |  |  |
Class of Stock [Line Items] |  |  |
Number of warrants included in preferred stock unit (in shares) |  |  | 1
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) | 4,541,852 |  |
Outstanding common stock available for purchase (in shares) | 1,178,125 |  |
Series A Preferred Stock |  |  |
Class of Stock [Line Items] |  |  |
Gross proceeds from issuance of preferred stock and warrants | $ 188,200,000 |  |
Issuance offering costs for preferred stock and warrants | 15,700,000 |  |
Reclassification to deferred rent receivable and charges | $ 1,700,000 |  |
Preferred stock, shares outstanding (in shares) | 7,903,302 |  |
Preferred stock, shares redeemed (in shares) | 223,295 |  |
Series A Preferred Stock | Preferred Stock, Shares Issued, One |  |  |
Class of Stock [Line Items] |  |  |
Preferred stock, shares issued (in shares) | 7,557,916 |  |
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 | 19,145 |
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 | 19,145 |
Preferred stock, shares redeemed (in shares) | 0 |  |
Series A Preferred Stock |  |  |
Class of Stock [Line Items] |  |  |
Preferred stock, shares issued (in shares) | 1,633,965 | 2,008,256 |
Preferred stock, shares outstanding (in shares) | 1,631,965 | 2,007,856 |
Series A Preferred Stock | Registration Statement |  |  |
Class of Stock [Line Items] |  |  |
Number of shares included in preferred stock unit (in shares) |  |  | 1

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