REDEEMABLE PREFERRED STOCK - Narrative (Details) - USD ($)								1 Months Ended			3 Months Ended		12 Months Ended
	Jul. 15, 2020	Jun. 15, 2020	May 15, 2020	Mar. 02, 2020	Dec. 20, 2019	Nov. 20, 2019	Nov. 21, 2017	Apr. 30, 2020	Feb. 29, 2020	Nov. 30, 2019	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019	Feb. 28, 2020
Class of Stock [Line Items]
Proceeds from issuance of preferred stock and warrants											$ 121,431,000
Issuance offering costs for preferred stock and warrants											9,567,000
Non-issuance offering costs for preferred stock and warrants											$ 6,461,000
Preferred stock redemption, trading days prior to redemption											20 days
Redeemable preferred stock dividends											$ 161,000	$ 0
Deferred rent receivable and charges reclassified to temporary equity											71,901,000
Redeemable preferred stock redemptions											10,000	4,000
Initial dividend on common stock					$ 4,380,644.70
Initial dividend, common stock, paid											$ 1,095,000	$ 5,474,000
Series A Preferred Stock
Class of Stock [Line Items]
Preferred stock, shares issued (in shares)											4,851,367
Proceeds from issuance of preferred stock and warrants											$ 120,520,000
Issuance offering costs for preferred stock and warrants											9,421,000
Reclassification to deferred rent receivable and charges											$ 877,000
Preferred stock, shares outstanding (in shares)											4,827,633
Number of shares redeemed											23,734
Series D Preferred Stock
Class of Stock [Line Items]
Preferred stock, shares issued (in shares)											5,980
Proceeds from issuance of preferred stock and warrants											$ 150,000
Issuance offering costs for preferred stock and warrants											4,000
Reclassification to deferred rent receivable and charges											$ 1,000
Preferred stock, shares outstanding (in shares)											5,980
Number of shares redeemed											0
Cumulative dividend rate									5.65%
Dividend per share per year (in usd per share)				$ 0.353125
Preferred dividends, per share amount (in usd per share)											$ 0.588542
Preferred stock, par value (in usd per share)											0.001			$ 25
Preferred stock, liquidation preference per share (in usd per share)											$ 25.00
Series A Preferred Stock
Class of Stock [Line Items]
Preferred stock, shares issued (in shares)											1,692,338		1,630,821
Preferred stock, shares outstanding (in shares)											1,687,938		1,630,421
Cumulative dividend rate											5.50%
Dividend per share per year (in usd per share)											$ 0.34375
Dividends accrued ( in usd per share)				$ 0.34375
Preferred dividends, per share amount (in usd per share)											0.68750	$ 0.34375
Preferred stock, par value (in usd per share)											0.001		$ 0.001
Preferred stock, liquidation preference per share (in usd per share)											$ 25.00		$ 25.00
Series A Preferred Unit
Class of Stock [Line Items]
Number of securities called by warrants or rights (in shares)											1,194,159
Series L Preferred Stock
Class of Stock [Line Items]
Preferred stock, shares issued (in shares)							8,080,740				8,080,740		8,080,740
Preferred stock, shares outstanding (in shares)											5,387,160		5,387,160
Cumulative dividend rate											5.50%
Dividend per share per year (in usd per share)											$ 1.56035
Preferred stock, par value (in usd per share)											0.001		$ 0.001
Preferred stock, liquidation preference per share (in usd per share)											$ 28.37		$ 28.37
Failure to declare or pay distributions, temporary increase per year							1.00%
Failure to declare or pay distributions, temporary increase per year, maximum increase							8.50%
Minimum fixed charge coverage ratio											125.00%
Registration Statement
Class of Stock [Line Items]
Warrant right to purchase a share of common stock (in shares)											0.25
Registration Statement | Series A Preferred Stock
Class of Stock [Line Items]
Redeemable preferred stock, par value (in usd per share)											$ 0.001
Preferred stock, stated value (in usd per share)											$ 25
Registration Statement | Series L Preferred Stock
Class of Stock [Line Items]
Preferred stock, liquidation preference per share (in usd per share)							$ 28.37
Subsequent Event | Series A Preferred Stock
Class of Stock [Line Items]
Number of shares redeemed								779
Tender Offer | Series L Preferred Stock
Class of Stock [Line Items]
Dividends accrued ( in usd per share)						$ 1.39
Shares repurchased (in shares)										2,693,580
Purchase price (in usd per share)										$ 29.12
Dividends, preferred stock, aggregate value						$ 3,744,000
Professional fees										$ 462,000
Cost to repurchase tendered shares										$ 75,155,000
Redeemable preferred stock redemptions													$ 5,873,000
Forecast | Series D Preferred Stock
Class of Stock [Line Items]
Preferred dividends, per share amount (in usd per share)	$ 0.117708	$ 0.117708	$ 0.117708
Forecast | Series A Preferred Stock
Class of Stock [Line Items]
Preferred dividends, per share amount (in usd per share)			$ 0.1145833
Dividends to be paid per share (in usd per share)	$ 0.1145833	$ 0.1145833
Series A Preferred Warrants
Class of Stock [Line Items]
Warrants issued (in shares)											4,603,287
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)											4,603,287