Acquisition - Purchase Price of Acquisition Allocated on Basis of Estimated Fair Value (Detail) (Miltope's Ruggedized Printer Product Line Operation [Member], USD $) In Thousands, unless otherwise specified	Jan. 22, 2014
Miltope's Ruggedized Printer Product Line Operation [Member]
Business Acquisition [Line Items]
Accounts Receivable	$ 713
Inventories	2,503
Identifiable Intangible Assets	3,400
Goodwill	196
Warranty Reserve	(80)
Total Purchase Price	$ 6,732