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Accrued Expenses and Other Liabilities | 12 Months Ended
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Dec. 31, 2011
Accrued Expenses and Other Liabilities | (6) Accrued Expenses and Other Liabilities Accrued expenses consist of the following at December 31, 2011 and 2010:
|  | 2011 |  |  | 2010 |
|  | (in thousands) |
Payroll and payroll-related expenses |  | $ | 1,120 |  |  | $ | 1,631 |
Research and development expenses |  |  | 1,132 |  |  |  | 340 |
Income taxes payable |  |  | — |  |  |  | 585 |
All other |  |  | 1,781 |  |  |  | 572 |
|  | $ | 4,033 |  |  | $ | 3,128 |

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- Definition Discloses the breakout of accrued expenses and other liabilities that are not individually material for a separate caption on the statement of financial position between the current portion (payable within 12 months of year end or the operating cycle) and non-current (payable after 12 months from year end). + References No definition available. + Details
Name: | amrn_AccruedExpensesAndOtherLiabilitiesDisclosureTextBlock
Namespace Prefix: | amrn_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration