CONDENSED CONSOLIDATED STATEMENT OF EQUITY - USD ($) $ in Thousands	Total	Class A Common Shares [Member]	Class B Common Shares [Member]	Series A Preferred Shares [Member]	Additional Paid-In Capital [Member]	Accumulated Deficit [Member]	Non-Controlling Interest [Member]
Beginning balance at Dec. 31, 2019	$ 1,043,370	$ 369	$ 12	$ 28	$ 1,149,721	$ (418,711)	$ 311,951
Beginning balance, shares at Dec. 31, 2019		36,897,000	1,243,000	2,800,000
Net loss	(30,975)					(20,664)	(10,311)
Preferred dividends declared	(1,225)					(1,225)
Vesting of restricted share units		$ 1			(1)
Vesting of restricted share units, shares		75,000
Share-based compensation	1,198				1,198
Share class surrenders			$ (12)		12
Share class surrenders, shares			(1,243,000)
OP Unit exchanges		$ 16			26,623		(26,639)
OP Unit exchanges, shares		1,650,000
Ending balance at Mar. 31, 2020	1,012,368	$ 386		$ 28	1,177,553	(440,600)	275,001
Ending balance, shares at Mar. 31, 2020		38,622,000	0	2,800,000
Beginning balance at Dec. 31, 2020	882,727	$ 389		$ 28	1,177,260	(528,637)	233,687
Beginning balance, shares at Dec. 31, 2020		38,896,428		2,800,000
Net loss	(10,933)					(7,720)	(3,213)
Preferred dividends declared	(1,225)					(1,225)
Vesting of restricted share units, shares		32,000
Share-based compensation	969				969
OP Unit exchanges	(138)	$ 17			22,645		(22,800)
OP Unit exchanges, shares		1,659,000
Ending balance at Mar. 31, 2021	$ 871,400	$ 406		$ 28	$ 1,200,874	$ (537,582)	$ 207,674
Ending balance, shares at Mar. 31, 2021		40,587,226	0	2,800,000