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Summary of Accrual Activities by Components Related to Company's Restructuring Charges (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Restructuring Cost And Reserve [Line Items]    
Accrued expense beginning balance $ 231 $ 1,374
Restructuring charges (reversal of charges) 5,840 414
Cash payments (3,126) (933)
Non-cash write-offs and other adjustments (1,063) (624)
Accrued expense ending balance 1,882 231
Severance    
Restructuring Cost And Reserve [Line Items]    
Accrued expense beginning balance 102 687
Restructuring charges (reversal of charges) 3,918 (83)
Cash payments (2,668) (502)
Non-cash write-offs and other adjustments 6  
Accrued expense ending balance 1,358 102
Facility    
Restructuring Cost And Reserve [Line Items]    
Accrued expense beginning balance 108 648
Restructuring charges (reversal of charges) 441 (247)
Cash payments (156) (293)
Non-cash write-offs and other adjustments 13  
Accrued expense ending balance 406 108
Depreciation    
Restructuring Cost And Reserve [Line Items]    
Restructuring charges (reversal of charges) 1,082 624
Non-cash write-offs and other adjustments (1,082) (624)
Other Restructuring Charges    
Restructuring Cost And Reserve [Line Items]    
Accrued expense beginning balance 21 39
Restructuring charges (reversal of charges) 399 120
Cash payments (302) (138)
Accrued expense ending balance $ 118 $ 21