Quantum Corporation Annual report pursuant to Section 13 and 15(d)

INTANGIBLE ASSETS AND GOODWILL - Schedule of Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Gross Amount	$ 250,111	$ 259,394
Accumulated Amortization	(249,380)	(255,483)
Net Amount	731	3,911
Purchased technology
Finite-Lived Intangible Assets [Line Items]
Gross Amount	179,992	179,475
Accumulated Amortization	(179,261)	(178,348)
Net Amount	731	1,127
Trademarks
Finite-Lived Intangible Assets [Line Items]
Gross Amount	3,900	3,900
Accumulated Amortization	(3,900)	(3,900)
Net Amount	0	0
Customer lists
Finite-Lived Intangible Assets [Line Items]
Gross Amount	66,219	76,019
Accumulated Amortization	(66,219)	(73,235)
Net Amount	$ 0	$ 2,784