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Note 15 - Revenue by Product Group, by Significant Customer and by Geographic Region; Geographic Information - Net Tangible Long-lived Assets by Principal Geographic Areas (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Property and equipment, net $ 52,296 $ 40,108
UNITED STATES    
Property and equipment, net 49,140 39,732
ITALY    
Property and equipment, net $ 3,156 $ 376