Annual report pursuant to Section 13 and 15(d)

Document and Entity Information

v2.4.0.8
Document and Entity Information (USD $)
In Millions, except Share data, unless otherwise specified
12 Months Ended
Mar. 31, 2014
May 30, 2014
Sep. 30, 2013
Document and Entity Information [Abstract]      
Entity Registrant Name QUANTUM CORP /DE/    
Entity Central Index Key 0000709283    
Current Fiscal Year End Date --03-31    
Entity Filer Category Accelerated Filer    
Trading Symbol QTM    
Entity Common Stock, Shares Outstanding   250,629,646  
Document Type 10-K    
Amendment Flag false    
Document Period End Date Mar. 31, 2014    
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2014    
Entity Well-Known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Public Float     $ 217.5