Investments in Unconsolidated Joint Ventures - Balance sheet (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
MEMBERS' EQUITY
Our investments in unconsolidated joint ventures	$ 19,893	$ 10,673
Corporate Joint Venture [Member]
ASSETS
Real estate, net	168,801	50,508
Cash and cash equivalents	1,688	344
Restricted cash	763	435
Tenant and other receivables, net	293	42
Prepaid expenses and other assets, net	173	66
Intangible assets, net	25,481	11,757
Total assets	197,199	63,152
LIABILITIES
Mortgages payable, net	114,481	41,207
Accounts payable and accrued expenses	1,678	598
Total liabilities	116,159	41,805
MEMBERS' EQUITY
Members' equity	93,411	27,169
Accumulated deficit	(10,310)	(5,822)
Accumulated other comprehensive loss	(2,061)
Total members' equity	81,040	21,347
Total liabilities and members' equity	197,199	63,152
Our investments in unconsolidated joint ventures	$ 19,893	$ 10,673