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Sales (Sales By Geographic Region) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Revenues from External Customers and Long-Lived Assets [Line Items]      
Sales attributable based on geographic location $ 75,622us-gaap_SalesRevenueNet [1] $ 73,298us-gaap_SalesRevenueNet [1] $ 48,729us-gaap_SalesRevenueNet [1]
North America [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Sales attributable based on geographic location 53,712us-gaap_SalesRevenueNet
/ us-gaap_StatementGeographicalAxis
= us-gaap_NorthAmericaMember
55,655us-gaap_SalesRevenueNet
/ us-gaap_StatementGeographicalAxis
= us-gaap_NorthAmericaMember
33,606us-gaap_SalesRevenueNet
/ us-gaap_StatementGeographicalAxis
= us-gaap_NorthAmericaMember
Europe [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Sales attributable based on geographic location 11,421us-gaap_SalesRevenueNet
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
9,257us-gaap_SalesRevenueNet
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
7,277us-gaap_SalesRevenueNet
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
Asia-Pacific [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Sales attributable based on geographic location $ 10,489us-gaap_SalesRevenueNet
/ us-gaap_StatementGeographicalAxis
= us-gaap_AsiaPacificMember
$ 8,386us-gaap_SalesRevenueNet
/ us-gaap_StatementGeographicalAxis
= us-gaap_AsiaPacificMember
$ 7,846us-gaap_SalesRevenueNet
/ us-gaap_StatementGeographicalAxis
= us-gaap_AsiaPacificMember
[1] Including sales to related parties in the amount of US$ 558 thousand, US$ 851 thousand and US$ 1,041 thousand in 2012, 2013 and 2014, respectively.