Acquisition - Schedule of Total Revenues, Losses, and Acquisition Costs (Parenthetical) (Details)	Jun. 30, 2019
Business Combinations [Abstract]
Acquisition fee paid to advisor (as percent)	2.00%

Asset Acquisition, Acquisition Related Costs, Percent of Investment.

No definition available.

Name:	ck0001652926_AssetAcquisitionAcquisitionRelatedCostsPercentOfInvestment
Namespace Prefix:	ck0001652926_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant