Annual report [Section 13 and 15(d), not S-K Item 405]

COVER

v3.25.2
COVER - USD ($)
 12 Months Ended
Mar. 31, 2025
Aug. 21, 2025
Sep. 30, 2024
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Current Fiscal Year End Date --03-31    
Document Period End Date Mar. 31, 2025    
Document Transition Report false    
Entity File Number 001-13449    
Entity Registrant Name QUANTUM CORP /DE/    
Entity Incorporation, State DE    
Entity Tax Identification Number 94-2665054    
Entity Address, Street 10770 E. Briarwood Avenue    
Entity Address, City Centennial    
Entity Address, State CO    
Entity Address, Postal Zip Code 80112    
City Area Code (408)    
Local Phone Number 944-4000    
Title of each class Common Stock, $0.01 par value per share    
Trading Symbol QMCO    
Name of each exchange on which registered NASDAQ    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status No    
Entity Interactive Data Current Yes    
Entity Filer Category Non-accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag false    
Document Financial Statement Error Correction true    
Document Financial Statement Restatement Recovery Analysis [Flag] true    
Entity Shell Company false    
Entity Public Float     $ 12,780,611
Entity Common Stock, Shares Outstanding   13,319,249  
Entity Central Index Key 0000709283    
Document Fiscal Year Focus 2025    
Document Fiscal Period Focus FY    
Amendment Flag false