Acquisition - Summary of Estimated Amortization Expense for Next Five Years (Detail) (Miltope Ruggedized Printer Product Line Operation [Member], USD $) In Thousands, unless otherwise specified	Jan. 31, 2014
Miltope Ruggedized Printer Product Line Operation [Member]
Business Acquisition [Line Items]
Estimated amortization expenses, 2015	$ 702
Estimated amortization expenses, 2016	357
Estimated amortization expenses, 2017	349
Estimated amortization expenses, 2018	331
Estimated amortization expenses, 2019	$ 278

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Amount of amortization expense expected to be recognized during the next fiscal year following the latest fiscal year for assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(3)

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

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Amount of amortization expense expected to be recognized during the fifth fiscal year following the latest fiscal year for assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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Amount of amortization expense expected to be recognized during the fourth fiscal year following the latest fiscal year for assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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Amount of amortization expense expected to be recognized during the third fiscal year following the latest fiscal year for assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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Amount of amortization expense expected to be recognized during the second fiscal year following the latest fiscal year for assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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