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Income Taxes - Components of Difference Between Provision (Benefit) for Income Taxes from Continuing Operations and Amount Computed by Applying Statutory Federal Income Tax Rate (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 31, 2014	Jan. 31, 2013
Income Tax Disclosure [Abstract]
Income tax provision at statutory rate	$ 480	$ 1,010
State taxes, net of federal tax effect	(74)	114
Change in valuation allowance	27	(49)
Change in reserves related to ASC 740 liability	(59)	(197)
Meals and entertainment	38	55
Domestic production deduction	(30)	(60)
Share-based compensation	36	26
Tax-exempt income	(22)	(16)
R&D credits	(114)	(106)
Foreign rate differential	(26)	(22)
Other permanent differences and miscellaneous, net	(81)	92
Total	$ 175	$ 847

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Income tax reconciliation change in reserves.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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