Annual report pursuant to Section 13 and 15(d)

Document and Entity Information

Document and Entity Information - USD ($)
12 Months Ended
Dec. 31, 2020
Mar. 15, 2021
Jun. 30, 2020
Cover [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Dec. 31, 2020    
Document Fiscal Year Focus 2020    
Document Fiscal Period Focus FY    
Trading Symbol OSS    
Entity Registrant Name One Stop Systems, Inc.    
Entity Central Index Key 0001394056    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Interactive Data Current Yes    
Current Fiscal Year End Date --12-31    
Entity Filer Category Non-accelerated Filer    
Entity Well-known Seasoned Issuer No    
Entity Public Float     $ 22,794,553
Entity Common Stock, Shares Outstanding   18,409,318  
Entity Shell Company false    
Entity Small Business true    
Entity Emerging Growth Company true    
Entity Ex Transition Period false    
ICFR Auditor Attestation Flag false    
Title of 12(b) Security Common Stock, par value $0.0001 per share    
Security Exchange Name NASDAQ    
Entity File Number 001-38371    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 33-0885351    
Entity Address, Address Line One 2235 Enterprise Street #110    
Entity Address, City or Town Escondido    
Entity Address, State or Province CA    
Entity Address, Postal Zip Code 92029    
City Area Code 760    
Local Phone Number 745-9883    
Document Annual Report true    
Document Transition Report false    
Documents Incorporated by Reference