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Cover - USD ($)
shares in Millions, $ in Millions
 12 Months Ended
Dec. 31, 2024
Feb. 28, 2025
Jun. 30, 2024
Cover [Abstract]      
Document Type 10-K/A    
Document Annual Report true    
Document Period End Date Dec. 31, 2024    
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 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     $ 250.4
Entity Common Stock, Shares Outstanding   54.3  
Documents Incorporated by Reference
None.
    
Entity Central Index Key 0001462056    
Amendment Flag false    
Document Fiscal Year Focus 2024    
Document Fiscal Period Focus FY