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15. Geographical Information (Details 1) (USD $)
Dec. 31, 2012
Dec. 31, 2011
Revenues from External Customers and Long-Lived Assets [Line Items]    
Long-term tangible assets $ 3,783,000 $ 4,255,000
US
   
Revenues from External Customers and Long-Lived Assets [Line Items]    
Long-term tangible assets 3,767,000 4,226,000
CA
   
Revenues from External Customers and Long-Lived Assets [Line Items]    
Long-term tangible assets $ 16,000 $ 29,000