Related Party Transactions - Schedule of Related Party Transactions (Details) - Affiliated Entity - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Related Party Transaction [Line Items]
Due from (to) related parties	$ 537	$ 2,130
Due from HIREIT
Related Party Transaction [Line Items]
Due from (to) related parties	11,238	10,359
Due to Hartman XIX
Related Party Transaction [Line Items]
Due from (to) related parties	(3,932)	(4,059)
Due to vREIT XXI
Related Party Transaction [Line Items]
Due from (to) related parties	(2,764)	(420)
Due to Advisor
Related Party Transaction [Line Items]
Due from (to) related parties	(2,376)	(2,077)
Due to the Property Manager
Related Party Transaction [Line Items]
Due from (to) related parties	(1,489)	(1,168)
Other Related Party
Related Party Transaction [Line Items]
Due from (to) related parties	$ (140)	$ (505)