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

INTANGIBLE ASSETS AND GOODWILL - Schedule of Intangible Amortization (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Intangible amortization	$ 3,697us-gaap_AmortizationOfIntangibleAssets	$ 8,902us-gaap_AmortizationOfIntangibleAssets	$ 13,299us-gaap_AmortizationOfIntangibleAssets
Purchased technology
Finite-Lived Intangible Assets [Line Items]
Intangible amortization	913	1,476	3,775
Trademarks
Finite-Lived Intangible Assets [Line Items]
Intangible amortization	0	0	244
Customer lists
Finite-Lived Intangible Assets [Line Items]
Intangible amortization	$ 2,784	$ 7,426	$ 9,280