Acquisition - Additional Information (Detail) (USD $)	12 Months Ended
	Jan. 31, 2014	Jan. 22, 2014
Business Acquisition [Line Items]
Funded acquisition using existing cash	$ 6,732,000
Transition services period	6 months
Miltope Ruggedized Printer Product Line Operation [Member]
Business Acquisition [Line Items]
Completion date of acquisition	Jan. 22, 2014
Purchase price of the acquisition	6,732,000
Funded acquisition using existing cash	6,732,000
Amount held in escrow related to business acquisition	500,000
Duration of escrow deposits	12 months
General and administrative expenses	90,000
Goodwill	196,000	196,000
Amortization expense	$ 0