Rendering

Component: (Network and Table)
Network
163 - Disclosure - Reconciliation of Provision for Income Taxes at Statutory Rates (Detail)
(http://www.achillion.com/taxonomy/role/DisclosureReconciliationOfProvisionForIncomeTaxesAtStatutoryRates)
TableIncome Tax Rate Reconciliation [Table]
Slicers (applies to each fact value in each table cell)
Income Tax Rate Reconciliation [Line Items]Period [Axis]
2012-01-01 - 2012-12-31
2011-01-01 - 2011-12-31
2010-01-01 - 2010-12-31
Federal statutory rate
(.340) 
(.340) 
(.340) 
State tax, net of federal benefit
(.050) 
(.050) 
(.050) 
Other
.0005  
.0010  
.0010  
Share-based compensation
(.0251) 
.0130  
.0420  
Valuation allowance
.4146  
.3760  
.3470  
Effective Income Tax Rate, Continuing Operations, Total
.00  
 
.00  
 
.00