XML 12 R1.htm IDEA: XBRL DOCUMENT v3.21.2
Document And Entity Information - shares
 9 Months Ended
Sep. 30, 2021
Nov. 12, 2021
Document Information Line Items    
Entity Registrant Name SeqLL, Inc.  
Trading Symbol SQL  
Document Type 10-Q  
Current Fiscal Year End Date --12-31  
Entity Common Stock, Shares Outstanding   11,886,379
Amendment Flag false  
Entity Central Index Key 0001605888  
Entity Current Reporting Status Yes  
Entity Filer Category Non-accelerated Filer  
Document Period End Date Sep. 30, 2021  
Document Fiscal Year Focus 2021  
Document Fiscal Period Focus Q3  
Entity Small Business true  
Entity Emerging Growth Company true  
Entity Shell Company false  
Entity Ex Transition Period false  
Document Quarterly Report true  
Document Transition Report false  
Entity File Number 333-150332  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 46-5319744  
Entity Address, Address Line One 317 New Boston Street  
Entity Address, Address Line Two Suite 210  
Entity Address, City or Town Boston  
Entity Address, Country MA  
Entity Address, Postal Zip Code 01801  
City Area Code 781  
Local Phone Number 460-6016  
Title of 12(b) Security Common Stock, par value $.0001 per share  
Security Exchange Name NASDAQ  
Entity Interactive Data Current Yes