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Accrued Expenses and Other Liabilities | 12 Months Ended
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Dec. 31, 2012
Accrued Expenses and Other Liabilities | (6) Accrued Expenses and Other Liabilities Accrued expenses consist of the following at December 31, 2012 and 2011:
|  | 2012 |  |  | 2011 |
|  | (in thousands) |
Payroll and payroll-related expenses |  | $ | 2,065 |  |  | $ | 1,120 |
Research and development expenses (1) |  |  | 10 |  |  |  | 1,132 |
All other |  |  | 3,149 |  |  |  | 1,781 |
|  | $ | 5,224 |  |  | $ | 4,033 |
(1) | Research and development accruals are based on the timing of clinical trial activities and related progress payments.

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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
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Namespace Prefix: | amrn_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration