Quarterly report pursuant to Section 13 or 15(d)


Cover - shares
9 Months Ended
Sep. 30, 2021
Oct. 20, 2021
Document Type 10-Q  
Amendment Flag false  
Document Quarterly Report true  
Document Transition Report false  
Document Period End Date Sep. 30, 2021  
Document Fiscal Period Focus Q3  
Document Fiscal Year Focus 2021  
Current Fiscal Year End Date --12-31  
Entity File Number 001-38015  
Entity Registrant Name Sigma Labs, Inc.  
Entity Central Index Key 0000788611  
Entity Tax Identification Number 27-1865814  
Entity Incorporation, State or Country Code NV  
Entity Address, Address Line One 3900 Paseo del Sol  
Entity Address, City or Town Santa Fe  
Entity Address, State or Province NM  
Entity Address, Postal Zip Code 87507  
City Area Code (505)  
Local Phone Number 438-2576  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   10,498,802
Common Stock, par value $0.001 per share    
Title of 12(b) Security Common Stock, par value $0.001 per share  
Trading Symbol SGLB  
Security Exchange Name NASDAQ  
Warrants to Purchase Common Stock,    
Title of 12(b) Security Warrants to Purchase Common Stock,  
Trading Symbol SGLBW  
Security Exchange Name NASDAQ