Restructuring Charges - Additional Information (Details)  | 
3 Months Ended | 6 Months Ended | |
|---|---|---|---|
| 
 Jun. 30, 2016  
USD ($) 
 | 
 Jun. 30, 2016  
USD ($) 
 | 
 Dec. 31, 2015  
Employee 
 | 
|
| Restructuring Cost And Reserve [Line Items] | |||
| Restructuring charges (credit) | $ (21,000) | $ 15,000 | |
| 2015 Restructuring [Member] | |||
| Restructuring Cost And Reserve [Line Items] | |||
| Number of employees terminated | Employee | 52 | ||
| 2015 Restructuring [Member] | Severance Costs and Contract Termination Costs [Member] | |||
| Restructuring Cost And Reserve [Line Items] | |||
| Restructuring charges (credit) | $ (21,000) | $ 15,000 | |
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- Definition Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available. 
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- Definition Restructuring and related cost number of employees terminated. No definition available. 
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- Details 
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- Details 
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