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CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands		12 Months Ended
		Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2014
Statement Of Income And Comprehensive Income [Abstract]
Net loss		$ (202,948)	$ (168,227)	$ (168,557)
Other comprehensive income (loss):
Changes in foreign currency translation adjustment	[1]	(26)	(71)	15
Net change in unrealized gains on available-for-sale investments	[1]	(2)
Other comprehensive income (loss)	[1]	(28)	(71)	15
Comprehensive loss		$ (202,976)	$ (168,298)	$ (168,542)
[1] Tax effect was not material

X

- Definition

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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-Publisher FASB
-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=51831270

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature, attributable to parent entity.

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