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Taxes (Detail Textuals) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Taxes    
Valuation allowance for deferred tax assets $ 47,356 $ 51,545
Change in valuation allowance (4,189) (4,963)
Federal    
Taxes    
NOLs carryforward 26,700 23,900
Foreign    
Taxes    
NOLs carryforward 171,700 173,000
State    
Taxes    
NOLs carryforward 17,000  
Research and development | Foreign    
Taxes    
Income tax credits $ 2,100 $ 3,200