Quarterly report pursuant to Section 13 or 15(d)

Real Estate Assets - Additional Information (Details)

Real Estate Assets - Additional Information (Details) - Millbrook, NY - ft²
3 Months Ended 9 Months Ended
Jun. 30, 2019
Sep. 30, 2019
Real Estate Properties [Line Items]    
Gross square feet of traditional drive-up storage units and all-climate-controlled units 16,500  
Estimate for expansion relating to construction cost   As of September 30, 2019, development costs for this project has been capitalized and are reflected in real estate assets, net on the Company’s consolidated balance sheet. We currently anticipate that the construction project will proceed accordingly, with construction completion approximately nine to twelve months from project commencement. However, there is no guarantee that we will complete this project in this timeframe or at all.