v3.19.3
Document and Entity Information Document - shares
9 Months Ended
Sep. 30, 2019
Nov. 08, 2019
Document and Entity Information [Abstract]    
Entity Registrant Name OptiNose, Inc.  
Entity Central Index Key 0001494650  
Current Fiscal Year End Date --12-31  
Entity Filer Category Accelerated Filer  
Document Type 10-Q  
Document Period End Date Sep. 30, 2019  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q3  
Amendment Flag false  
Entity Common Stock, Shares Outstanding   41,581,666
Entity Emerging Growth Company true  
Entity Small Business true  
Entity Ex Transition Period true  
Entity Current Reporting Status Yes  
Entity Shell Company false  
Entity Interactive Data Current Yes