Quarterly report pursuant to Section 13 or 15(d)

Document and Entity Information

Document and Entity Information - shares
6 Months Ended
Jun. 30, 2019
Aug. 06, 2019
Document And Entity Information    
Entity Registrant Name Black Ridge Acquisition Corp.  
Entity Central Index Key 0001708341  
Document Type 10-Q  
Trading Symbol BRACU  
Security 12b title Common Stock  
Document Period End Date Jun. 30, 2019  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Is Entity's Reporting Status Current? Yes  
Entity Filer Category Non-accelerated Filer  
Entity Common Stock, Shares Outstanding   8,448,273
Document Fiscal Period Focus Q2  
Document Fiscal Year Focus 2019  
Entity Emerging Growth Company true  
Entity Small Business true  
Entity Transition Period false  
Interactive data current Yes  
State of incorporation DE  
Entity file number 001-38226