CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash Flows from Operating Activities:
Net loss	$ (9,086,000)	$ (26,599,000)	$ (3,298,000)
Adjustment to reconcile net loss to net cash (used in) provided by operating activities
Equity in income of unconsolidated entity	(2,800,000)	(339,000)	(54,000)
Distribution of earnings from unconsolidated joint venture	0	56,000	54,000
Casualty-related income, net	0	0	(1,614,000)
Depreciation and amortization	20,236,000	20,405,000	14,429,000
Impairment charges on real estate	0	14,745,000	0
(Gain) loss on real estate equity securities	(2,704,000)	1,924,000	0
Gain on real estate sale	(4,178,000)	0	0
Noncash interest income on real estate-related investment	0	0	(58,000)
Loss on extinguishment of debt	105,000	0	0
Deferred rents	(567,000)	(1,428,000)	(774,000)
Bad debt expense	0	344,000	152,000
Amortization of above- and below-market leases, net	(2,654,000)	(3,417,000)	(2,028,000)
Amortization of deferred financing costs	1,763,000	1,207,000	910,000
Foreign currency translation gain	(64,000)	0	0
Unrealized loss (gain) on derivative instruments	5,000	(124,000)	175,000
Changes in operating assets and liabilities:
Rents and other receivables	1,076,000	(1,480,000)	(804,000)
Prepaid expenses and other assets	(1,394,000)	(1,738,000)	2,123,000
Accounts payable and accrued liabilities	(192,000)	136,000	(783,000)
Due to affiliates	563,000	(7,000)	27,000
Other liabilities	(204,000)	930,000	372,000
Net cash (used in) provided by operating activities	(95,000)	4,615,000	8,829,000
Cash Flows from Investing Activities:
Acquisitions of real estate	0	0	(193,146,000)
Proceeds from sale of real estate, net	17,697,000	0	0
Improvements to real estate	(14,145,000)	(8,914,000)	(9,744,000)
Investment in real estate securities	0	(9,150,000)	0
Payments for construction costs	(445,000)	(5,699,000)	(5,575,000)
Payoff of real estate loan receivable	0	3,500,000	0
Contributions to unconsolidated joint venture	(2,900,000)	0	0
Distribution of earnings from unconsolidated joint venture	5,104,000	0	0
Proceeds from insurance claims	0	237,000	5,080,000
Purchase of interest rate cap agreement	(58,000)	(16,000)	(14,000)
Proceeds from derivative instrument	145,000	0	0
Net cash provided by (used in) investing activities	5,398,000	(20,042,000)	(203,399,000)
Cash Flows from Financing Activities:
Proceeds from notes payable	180,164,000	2,278,000	120,025,000
Principal payments on notes payable	(179,383,000)	(5,499,000)	0
Payments of deferred financing costs	(3,197,000)	(254,000)	(1,782,000)
Principal payments on finance lease obligations	(196,000)	(175,000)	(166,000)
Proceeds from issuance of common stock	0	17,184,000	70,090,000
Payments to redeem common stock	(3,048,000)	(2,441,000)	(1,359,000)
Payments of commissions on stock sales, dealer manager fees and stockholder servicing fees	0	(1,645,000)	(4,607,000)
Payments of other offering costs	(10,000)	(1,217,000)	0
Distributions paid	(1,403,000)	(1,861,000)	(1,453,000)
Noncontrolling interest contributions	239,000	1,362,000	1,774,000
Distributions to noncontrolling interest	(1,851,000)	(500,000)	(25,000)
Net cash (used in) provided by financing activities	(8,685,000)	7,232,000	182,497,000
Net decrease in cash, cash equivalents and restricted cash	(3,382,000)	(8,195,000)	(12,073,000)
Cash, cash equivalents and restricted cash, beginning of period	26,858,000	35,053,000	47,126,000
Cash, cash equivalents and restricted cash, end of period	23,476,000	26,858,000	35,053,000
Supplemental Disclosure of Noncash Investing and Financing Activities:
Interest paid, net of capitalized interest of $0, $3,920 and $4,075 for the years ended December 31, 2019, 2018 and 2017, respectively	17,574,000	12,427,000	6,390,000
Distributions paid to common stockholders through common stock issuances pursuant to the dividend reinvestment plan	2,218,000	3,028,000	2,375,000
Redemptions payable	2,218,000	3,028,000	0
Accrued improvements to real estate	1,158,000	1,381,000	805,000
Other offering costs due to affiliates	0	0	1,042,000
Distributions payable	242,000	484,000	366,000
Acquisition fees due to affiliates	29,000	178,000	77,000
Construction cost payable	0	400,000	426,000
Stock dividends issued	$ 0	$ 5,289,000	$ 4,648,000