v3.20.2
Business Description - Additional Information (Detail)
3 Months Ended 6 Months Ended
Feb. 07, 2020
USD ($)
Jun. 30, 2020
USD ($)
Property
State
Jun. 30, 2019
USD ($)
Jun. 30, 2020
USD ($)
Property
State
Jun. 30, 2019
USD ($)
Business Description [Line Items]          
Date of incorporation       Oct. 18, 2007  
Number of leased commercial properties owned | Property   632   632  
Number of States in which properties located | State   41   41  
Internalization fees | $   $ 389,000 $ 272,000 $ 1,594,000 $ 272,000
Property Management Agreement and Asset Management Agreement | Merger Agreement          
Business Description [Line Items]          
Internalization fees | $ $ 0        
British Columbia, Canada          
Business Description [Line Items]          
Number of leased commercial properties owned | Property   1   1