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Cover - USD ($)
shares in Millions, $ in Millions
 12 Months Ended
Dec. 31, 2023
Feb. 29, 2024
Jun. 30, 2023
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2023    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Entity File Number 001-41026    
Entity Registrant Name BACKBLAZE, INC.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 20-8893125    
Entity Address, Address Line One 201 Baldwin Ave.    
Entity Address, City or Town San Mateo    
Entity Address, State or Province CA    
Entity Address, Postal Zip Code 94401    
City Area Code 650    
Local Phone Number 352-3738    
Title of 12(b) Security Class A Common Stock, $0.0001 par value per share    
Trading Symbol BLZE    
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 true    
Entity Ex Transition Period false    
ICFR Auditor Attestation Flag false    
Document Financial Statement Error Correction false    
Entity Shell Company false    
Entity Public Float     $ 98.2
Entity Common Stock, Shares Outstanding   41.2  
Documents Incorporated by Reference
Portions of the information called for by Part III of this Annual Report on Form 10-K is hereby incorporated by reference from the definitive proxy statement for the registrant’s 2024 annual meeting of stockholders, which will be filed with the Securities and Exchange Commission not later than 120 days after the registrant’s fiscal year ended December 31, 2023.
    
Entity Central Index Key 0001462056    
Amendment Flag false    
Document Fiscal Year Focus 2023    
Document Fiscal Period Focus FY