Document And Entity Information - shares
9 Months Ended
Sep. 30, 2019
Oct. 31, 2019
Document And Entity Information [Abstract]    
Entity Registrant Name Pulse Biosciences, Inc.  
Entity Filer Category Accelerated Filer  
Entity Central Index Key 0001625101  
Amendment Flag false  
Document Type 10-Q  
Document Fiscal Period Focus Q3  
Document Period End Date Sep. 30, 2019  
Document Fiscal Year Focus 2019  
Current Fiscal Year End Date --12-31  
Trading Symbol PLSE  
Title of 12(b) Security Common Stock, par value $0.001 per share  
Entity Current Reporting Status Yes  
Entity Emerging Growth Company true  
Entity Ex Transition Period true  
Entity Small Business true  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   20,788,149