Related Party Transactions (Details Textual) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Related Party Transaction [Line Items]
Due From Affiliates Excluding Former Advisor	$ 2,500		$ 2,500		$ 2,000
Incentive Fee Expense		$ 3,600		$ 4,000
Stock Issued During Period, Shares, Share-based Compensation, Gross				333,848
Issuance of Preferred Stock, Commission Fee Percentage			10.00%
Issuance Of Preferred Stock Dealer Manager Fee Percentage			10.00%
Commissions Payable to Broker-Dealers and Clearing Organizations	3,500	1,500	$ 3,500	$ 1,500
General and Administrative Expense [Member]
Related Party Transaction [Line Items]
Reimbursement Of Organizational And Offering Costs		400		700
Allocated Share-based Compensation Expense				30
Reimbursement of Payroll Related Costs	100		300
Reimbursement of Payroll Operating Costs	$ 500		900
Long-term Incentive Plan Units [Member]
Related Party Transaction [Line Items]
Management Fees		2,600		4,900
LTIP Units [Member] | General and Administrative Expense [Member]
Related Party Transaction [Line Items]
Allocated Share-based Compensation Expense		$ 800		$ 1,100
LTIP Units [Member] | Long-term Incentive Plan Units [Member]
Related Party Transaction [Line Items]
Stock Issued During Period, Shares, Share-based Compensation, Gross				404,631
Series B Preferred Stock [Member]
Related Party Transaction [Line Items]
Reimbursement Of Offering Costs			$ 600