Income Taxes - Components of Income Tax (Benefit) Provisions from Continuing Operations (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Jan. 31, 2015	Jan. 31, 2014	Jan. 31, 2013
Current:
Federal		$ 11us-gaap_CurrentFederalTaxExpenseBenefit
State	(762)	50	231
Foreign	24us-gaap_CurrentForeignTaxExpenseBenefit	692us-gaap_CurrentForeignTaxExpenseBenefit	(1,305)us-gaap_CurrentForeignTaxExpenseBenefit
Total	(738)us-gaap_CurrentIncomeTaxExpenseBenefit	753us-gaap_CurrentIncomeTaxExpenseBenefit	(1,074)us-gaap_CurrentIncomeTaxExpenseBenefit
Deferred:
Federal	0	0	0
State			(348)
Foreign	(368)	(698)	(133)
Total	(368)us-gaap_DeferredIncomeTaxExpenseBenefit	(698)us-gaap_DeferredIncomeTaxExpenseBenefit	(481)us-gaap_DeferredIncomeTaxExpenseBenefit
Income tax (benefit) provision	$ (1,106)us-gaap_IncomeTaxExpenseBenefit	$ 55us-gaap_IncomeTaxExpenseBenefit	$ (1,555)us-gaap_IncomeTaxExpenseBenefit

Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.

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