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Acquisition of Pharmasset, Inc. Accelerated Stock-Based Compensation Expense (Details) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended |
|---|---|
|
Mar. 31, 2012
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|
| Accelerated Stock-Based Compensation [Line Items] | |
| Accelerated Stock-Based Compensation | $ 193,937 |
|
Research and Development Expense [Member]
|
|
| Accelerated Stock-Based Compensation [Line Items] | |
| Accelerated Stock-Based Compensation | 100,149 |
|
Selling General And Administrative Expenses [Member]
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|
| Accelerated Stock-Based Compensation [Line Items] | |
| Accelerated Stock-Based Compensation | $ 93,788 |