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152 - Disclosure - Income Taxes - Company's Deferred Tax Assets and Liabilities (Detail)
(http://agios.com/taxonomy/role/DisclosureIncomeTaxesCompanysDeferredTaxAssetsAndLiabilities)
Table(Implied)
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0001439222 (http://www.sec.gov/CIK)
Income Tax Disclosure [Abstract]Period [Axis]
2016-12-31
2015-12-31
Income Tax Disclosure [Abstract]
 
 
Deferred tax assets:
 
 
Net operating loss carryforwards
126,077,000  
81,947,000  
Deferred revenue
8,051,000  
7,046,000  
Tax credit carryforwards
43,350,000  
16,708,000  
Purchased intangible assets
4,410,000  
724,000  
Stock-based compensation
22,731,000  
11,923,000  
Deferred rent
8,516,000  
7,975,000  
Non-deductible accruals and reserves
3,310,000  
2,520,000  
Total deferred tax assets
216,445,000  
 
128,843,000  
 
Valuation allowance
(208,033,000) 
(121,874,000) 
Total deferred tax assets
8,412,000  
 
6,969,000  
 
Deferred tax liabilities:
 
 
Depreciation and amortization
(8,412,000) 
(6,969,000) 
Total deferred tax liabilities
(8,412,000) 
(6,969,000) 
Net deferred tax asset
0  
 
0