| Reduction in Force (Details) $ in Thousands | 1 Months Ended | 6 Months Ended | 
|---|---|---|
| Mar. 31, 2015  employee | Jun. 30, 2015  USD ($) | |
| Restructuring Reserve | ||
| Number of employees terminated, staff | 7 | |
| Number of employees terminated, executives | 3 | |
| Restructuring costs | $ | $ 1,300 | |
| Restructuring costs related to equity awards | $ | $ 273 | 
| X | ||||||||||
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- Definition Number of Employees Terminated, Executives No definition available. 
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- Definition Number of Employees Terminated, Staff No definition available. 
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- Definition Restructuring Costs Related to Equity Awards No definition available. 
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- Definition Amount, after cash payment, 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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- References No definition available. 
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