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GOODWILL AND INTANGIBLE ASSETS (Details 2) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Intangible Assets      
Gross amount $ 15,000 $ 15,000  
Accumulated amortization (14,919) (14,597)  
Intangibles, net 81 403  
Amortization expense for intangibles 300 800 $ 2,100
Approximate amortization expense for intangibles      
Intangibles, net 81 403  
Core Technology      
Intangible Assets      
Gross amount 2,900 2,900  
Accumulated amortization (2,819) (2,497)  
Intangibles, net $ 81 $ 403  
Estimated Useful Life 9 years 9 years  
Approximate amortization expense for intangibles      
2014 $ 100    
Intangibles, net 81 $ 403  
Developed Technology      
Intangible Assets      
Gross amount 11,700 11,700  
Accumulated amortization (11,700) (11,700)  
Intangibles, net $ 0 $ 0  
Estimated Useful Life 7 years 7 years  
Approximate amortization expense for intangibles      
Intangibles, net $ 0 $ 0  
Trademarks and trade names      
Intangible Assets      
Gross amount 400 400  
Accumulated amortization (400) (400)  
Intangibles, net $ 0 $ 0  
Estimated Useful Life 7 years 7 years  
Approximate amortization expense for intangibles      
Intangibles, net $ 0 $ 0