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Revenue by product families (Details) (USD $)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Cordless barcode scanning and related product and service
   
Revenues: (in thousands) $ 9,747 $ 5,953
Mobile handheld computer and related product and service
   
Revenues: (in thousands) 5,287 7,187
Other
   
Revenues: (in thousands) 627 425
Total
   
Revenues: (in thousands) $ 15,661 $ 13,565