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Income Taxes - Components of Difference Between Provision for Income Taxes and Amount Computed by Applying Statutory Federal Income Tax Rate (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2017	Jan. 31, 2016	Jan. 31, 2015
Income Tax Disclosure [Abstract]
Income Tax Provision at Statutory Rate	$ 2,246	$ 2,349	$ 2,357
Capitalized Transaction Costs	179
Unrecognized Tax Benefits	165	(67)	23
State Taxes, Net of Federal Tax Effect	162	277	233
Domestic Production Deduction	(103)	(134)	(164)
R&D Credits	(168)	(176)	(135)
Other	(104)	135	(44)
Total	$ 2,377	$ 2,384	$ 2,270

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Income tax reconciliation capitalized transaction costs.

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Income tax reconciliation unrecognized tax expense (benefits).

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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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-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
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Amount of the difference between reported income tax expense (benefit) and the expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to deduction for qualified production activity.

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The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to state and local income tax expense (benefit).

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to research tax credit.

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