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Segment reporting and concentrations (Details 1) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Revenues from External Customers and Long-Lived Assets [Line Items]    
Long - lived assets $ 6,758 $ 11,331
UNITED STATES
   
Revenues from External Customers and Long-Lived Assets [Line Items]    
Long - lived assets 1,151 3,978
PHILIPPINES
   
Revenues from External Customers and Long-Lived Assets [Line Items]    
Long - lived assets 1,917 1,424
INDIA
   
Revenues from External Customers and Long-Lived Assets [Line Items]    
Long - lived assets 2,660 4,926
SRI LANKA
   
Revenues from External Customers and Long-Lived Assets [Line Items]    
Long - lived assets 989 931
ISRAEL
   
Revenues from External Customers and Long-Lived Assets [Line Items]    
Long - lived assets 41 72
Foreign Countries
   
Revenues from External Customers and Long-Lived Assets [Line Items]    
Long - lived assets $ 5,607 $ 7,353