Nature of Operations and Business Risks - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified |
12 Months Ended | |
---|---|---|
Dec. 31, 2014
Product
|
Dec. 31, 2013
|
|
Organization Consolidation And Presentation Of Financial Statements [Abstract] | ||
Number of approved products | 5 | |
Accumulated deficit | $ (849,770) | $ (715,801) |