Quarterly report pursuant to Section 13 or 15(d)

Document and Entity Information

Document and Entity Information - shares
9 Months Ended
Sep. 30, 2021
Nov. 10, 2021
Document and Entity Information    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Sep. 30, 2021  
Document Transition Report false  
Entity File Number 001-36278  
Entity Registrant Name NEXGEL, INC.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 26-4042544  
Entity Address, Address Line One 2150 Cabot Blvd West  
Entity Address, Address Line Two Suite B  
Entity Address, City or Town Langhorne  
Entity Address, State or Province PA  
Entity Address, Postal Zip Code 19047  
City Area Code 215  
Local Phone Number 702-8550  
Entity Current Reporting Status No  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   104,277,112
Entity Central Index Key 0001468929  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2021  
Document Fiscal Period Focus Q3  
Amendment Flag false