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Commitments and Contingencies (Details Textual) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Commitments and Contingencies [Line Items]      
Long-Term Contracts, Contract Price $ 5,355 $ 3,807  
Long-Term Contracts, Commitments Amount 4,086 3,087  
Security Deposit 1,256 986  
Operating Leases, Rent Expense, Net 2,082 2,126 $ 2,652
Contractual Obligation $ 95,210 $ 153,422  
Lease Expiration Period The lease arrangement will expire gradually from 2016 to 2024.    
Minimum [Member]      
Commitments and Contingencies [Line Items]      
Sales Commissions Percentage 0.50%    
Maximum [Member]      
Commitments and Contingencies [Line Items]      
Sales Commissions Percentage 2.00%