Acquisition - Value of the Acquired Identifiable Intangible Assets and Related Estimated Useful Lives (Detail) (Miltope Ruggedized Printer Product Line Operation [Member], USD $) In Thousands, unless otherwise specified			12 Months Ended
	Jan. 31, 2014	Jan. 22, 2014	Jan. 31, 2014 Customer Contract Relationships [Member]	Jan. 31, 2014 Backlog [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Fair Value	$ 3,400	$ 3,400	$ 3,100	$ 300
Useful Life			10 years	1 year