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Restructuring (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2016
Mar. 31, 2016
Jun. 30, 2015
Mar. 31, 2015
Jun. 30, 2016
Jun. 30, 2015
Restructuring Reserve [Roll Forward]            
Balance at beginning of period $ 126   $ 32 $ 216   $ 216
Payments/Settlements 93   32 303   93
Charges   $ 126   119 $ 126 119
Payments/Settlements (93)   (32) (303)   (93)
Balance at end of period   126   32    
Employee Severance [Member]            
Restructuring Reserve [Roll Forward]            
Balance at beginning of period 126   14 190   190
Payments/Settlements 93   14 295 93 309
Charges   126   119 126  
Payments/Settlements $ (93)   (14) (295) $ (93) (309)
Balance at end of period   $ 126   14    
Facility Costs And Contract Termination [Member]            
Restructuring Reserve [Roll Forward]            
Balance at beginning of period     18 26   26
Payments/Settlements     (18) (8)   (26)
Payments/Settlements     $ 18 8   $ 26
Balance at end of period       $ 18