Accounts Payable, Accrued Expenses and Other Liabilities - Additional Information (Details) - The 50/50 Student Housing--UNL [Member] - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Lessee Lease Description [Line Items]
Initial lease term expiration period	2048-03
Lease agreement extend term	5 years
Annual lease payments	$ 100
Minimum annual rentals under lease agreement	$ 132,000
Annual increment percentage in lease rent	2.00%
Lease agreement annual renewable increase percentage after july 31,2034	3.00%
Expenses related to the agreement	$ 168,000	$ 168,000	$ 168,000