Debt	12 Months Ended
Dec. 31, 2011
Debt	(8) Debt As of December 31, 2011 and 2010, the Company had no borrowings. June and July 2009 Bridge Notes In June 2009 Amarin completed a $2.6 million private placement of 8% convertible bridge loans due August 2009. In conjunction with the June 2009 bridge loan, the Company issued 1,444,442 warrants with an exercise price of $1.00. In July 2009, the Company completed a second private placement of $3.0 million of 8% convertible bridge loans due September 30, 2009. In conjunction with the July 2009 bridge loan (i) $0.1 million of the June 2009 bridge notes were repaid, (ii) the maturity date of the June 2009 bridge notes was extended to September 30, 2009, (iii) the Company cancelled and reissued 1,388,887 of the June 2009 warrants with an exercise price of $1.00 and (iv) issued an additional 1,666,663 warrants with an exercise price of $1.00 (see Note 7 – Warrants). The warrants were classified as a derivative and the fair value of these warrants of $2.8 million was recorded as a warrant derivative liability, with the remaining fair value of the proceeds received of $2.8 million recorded as loan payable. The difference between the loan payable of $2.8 million and the face value of the bridge notes of $5.6 million was recognized over the remaining term of the loan as interest expense of $2.8 million, and is included in the statement of operations for the period ended December 31, 2009. In conjunction with the $70.0 million October 2009 private placement, $3.6 million of the $5.5 million outstanding bridge loan notes were converted into 3,999,996 common stock and new warrants were issued to purchase 1,999,996 common shares at an exercise price of $1.50. The holders of the remaining bridge loans elected to have their principal of $1.9 million and accrued interest of $0.1 million which was repaid in cash in 2009.

Debt

12 Months Ended

Dec. 31, 2011

(8) Debt

As of December 31, 2011 and 2010, the Company had no borrowings.

June and July 2009 Bridge Notes

In June 2009 Amarin completed a $2.6 million private placement of 8% convertible bridge loans due August 2009. In conjunction with the June 2009 bridge loan, the Company issued 1,444,442 warrants with an exercise price of $1.00. In July 2009, the Company completed a second private placement of $3.0 million of 8% convertible bridge loans due September 30, 2009. In conjunction with the July 2009 bridge loan (i) $0.1 million of the June 2009 bridge notes were repaid, (ii) the maturity date of the June 2009 bridge notes was extended to September 30, 2009, (iii) the Company cancelled and reissued 1,388,887 of the June 2009 warrants with an exercise price of $1.00 and (iv) issued an additional 1,666,663 warrants with an exercise price of $1.00 (see Note 7 – Warrants). The warrants were classified as a derivative and the fair value of these warrants of $2.8 million was recorded as a warrant derivative liability, with the remaining fair value of the proceeds received of $2.8 million recorded as loan payable. The difference between the loan payable of $2.8 million and the face value of the bridge notes of $5.6 million was recognized over the remaining term of the loan as interest expense of $2.8 million, and is included in the statement of operations for the period ended December 31, 2009.

In conjunction with the $70.0 million October 2009 private placement, $3.6 million of the $5.5 million outstanding bridge loan notes were converted into 3,999,996 common stock and new warrants were issued to purchase 1,999,996 common shares at an exercise price of $1.50. The holders of the remaining bridge loans elected to have their principal of $1.9 million and accrued interest of $0.1 million which was repaid in cash in 2009.