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Business Combination (Details) (USD $)
6 Months Ended 12 Months Ended
Dec. 31, 2012
Dec. 31, 2012
Dec. 31, 2011
Jul. 02, 2012
Business Combinations [Abstract]        
Goodwill $ 29,022,000 $ 29,022,000 $ 27,073,000  
Customer relationships
       
Business Combinations [Abstract]        
Estimated period of benefit   3 years    
GVT Acquisition
       
Business Acquisition [Line Items]        
Business acquisition, purchase price       2,400,000
Business Combinations [Abstract]        
Identifiable net assets       500,000
Goodwill       1,867,000
Total purchase price allocation       2,367,000
Goodwill translation adjustment 100,000      
Acquisition legal and accounting fees   400,000    
Business Combination, Pro Forma Information [Abstract]        
Pro Forma Revenue   106,132,000 83,879,000  
Pro Forma Cost of goods sold   25,282,000 18,746,000  
Pro Forma Total operating expenses   102,430,000 84,402,000  
Pro Forma Net loss   (35,464,000) (28,862,000)  
Pro Forma Net loss per share - basic and diluted   (0.59) (0.51)  
GVT Acquisition | Customer relationships
       
Business Combinations [Abstract]        
Identifiable net assets       500,000
Amortization expense $ 100,000