Annual report pursuant to Section 13 and 15(d)

BALANCE SHEET DETAILS - Schedule of Manufacturing Inventories (Details)

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BALANCE SHEET DETAILS - Schedule of Manufacturing Inventories (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Mar. 31, 2014
Balance Sheet Related Disclosures [Abstract]    
Finished goods $ 28,022qtm_ManufacturingInventoriesFinishedGoods $ 18,069qtm_ManufacturingInventoriesFinishedGoods
Work in process 58qtm_ManufacturingInventoriesWorkInProcess 1,056qtm_ManufacturingInventoriesWorkInProcess
Materials and purchased parts 22,194qtm_ManufacturingInventoriesMaterialsAndPurchasedParts 15,690qtm_ManufacturingInventoriesMaterialsAndPurchasedParts
Manufacturing inventories, net $ 50,274qtm_ManufacturingInventoriesNet $ 34,815qtm_ManufacturingInventoriesNet