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163 - Disclosure - Difference between Benefit from Income Taxes and Amount Computed by Applying Statutory Income Tax Rate to Income Before Taxes (Detail)
(http://www.amarincorp.com/taxonomy/role/DisclosureDifferenceBetweenBenefitFromIncomeTaxesAndAmountComputedByApplyingStatutoryIncomeTaxRateToIncomeBeforeTaxes)
TableIncome Taxes [Table]
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0000897448 (http://www.sec.gov/CIK)
Legal Entity [Axis]Entity [Domain]
Income Taxes [Line Items]Period [Axis]
2016-01-01 - 2016-12-31
2015-01-01 - 2015-12-31
2014-01-01 - 2014-12-31
Benefits from taxes at statutory rate
(19,039,000) 
(29,572,000) 
(14,786,000) 
Rate differential
4,667,000  
8,572,000  
9,493,000  
Change in valuation reserves
13,276,000  
8,719,000  
(3,034,000) 
Derivative liabilities
(668,000) 
187,000  
(2,706,000) 
Gain on extinguishment of debt
 
(328,000) 
(9,509,000) 
Research and development credits
(1,689,000) 
(1,284,000) 
(1,455,000) 
Tax return to provision adjustments
4,524,000  
2,248,000  
10,026,000  
Cumulative translation adjustment
7,385,000  
7,811,000  
8,061,000  
Permanent and other
(409,000) 
(1,033,000) 
1,073,000  
Non-deductible interest expense
1,922,000  
1,594,000  
 
Provision for (benefit from) income taxes
9,969,000  
 
(3,086,000) 
 
(2,837,000)