Identified Intangible Assets, Net (Details) - Acquired in-place leases - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Gross value of leases	$ 17,300,000	$ 18,500,000
Acquired in-place leases, accumulated amortization	17,300,000	18,500,000
Amortization expense	$ 0	$ 813,000