Annual report pursuant to Section 13 and 15(d)


Cover - USD ($)
12 Months Ended
Dec. 31, 2021
Mar. 23, 2022
Jun. 30, 2021
Cover [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Annual Report true    
Document Transition Report false    
Document Period End Date Dec. 31, 2021    
Document Fiscal Period Focus FY    
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    
Title of 12(b) Security Common Stock, par value $0.001 per share    
Trading Symbol SGLB    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
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 Public Float     $ 40,750,250
Entity Common Stock, Shares Outstanding   10,498,802  
Documents Incorporated by Reference [Text Block] None    
ICFR Auditor Attestation Flag false    
Auditor Firm ID 457    
Auditor Name Haynie    
Auditor Location Salt Lake City, Utah