Subsequent Event	12 Months Ended
Dec. 31, 2011
Subsequent Event	(16) Subsequent Event In January 2012, the Company completed the sale of $150.0 million in aggregate principal amount of 3.5% Convertible Senior Notes due 2032. The notes were issued by Corsicanto Limited, an Irish limited company acquired by Amarin in January 2012. Corsicanto Limited is a wholly-owned subsidiary of Amarin Corporation plc. The general, unsecured, senior obligations are guaranteed by the parent. Net proceeds to us, after payment of underwriting fees and estimated expenses, were approximately $144.3 million. The notes bear cash interest at a rate of 3.5% per year, payable semiannually in arrears on January 15 and July 15 of each year, beginning on July 15, 2012 and mature on January 15, 2032. The notes are subject to repurchase by us at the option of the holders on each of January 19, 2017, January 19, 2022, and January 19, 2027, at a price equal to 100% of the principal amount of the notes to be repurchased, plus accrued and unpaid interest to, but excluding, the fundamental change repurchase date. Holders may convert their notes at their option at any time prior to the close of business on the business day immediately preceding October 15, 2031 only under the following circumstances: (1) during any calendar quarter commencing after March 31, 2012 (and only during such calendar quarter), if the last reported sale price of the Company’s common stock for at least 20 trading days (whether or not consecutive) during a period of 30 consecutive trading days ending on the last trading day of the immediately preceding calendar quarter is greater than or equal to 130% of the conversion price on each applicable trading day; (2) during the five the consecutive business day period immediately following any five consecutive trading day period, or the measurement period, in which the trading price per $1,000 principal amount of notes for each trading day of the measurement period was less than 98% of the product of the last reported sale price of the Company’s common stock and the conversion rate on each such trading day; (3) if the Company calls any or all of the notes for redemption, at any time prior to the close of business on the scheduled trading day immediately preceding the redemption date; or (4) upon the occurrence of specified corporate events. On or after October 15, 2031 until the close of business on the second scheduled trading day immediately preceding the maturity date, holders may convert their notes at any time, regardless of the foregoing conditions have been satisfied. Upon conversion, the Company will pay or deliver, as the case may be, cash, shares of its common stock (and cash in lieu of any fractional share) or a combination of cash and shares of its common stock, at the Company’s election. The conversion rate will initially be 113.4572 shares of common stock per $1,000 principal amount of notes (equivalent to an initial conversion price of approximately $8.8125 per share of common stock). The conversion rate will be subject to adjustment in some events but will not be adjusted for any accrued and unpaid interest. In addition, following certain corporate events that occur prior to the maturity date, the Company will increase the conversion rate for a holder who elects to convert its notes in connection with such a corporate event in certain circumstances and will pay to such holder any accrued and unpaid interest on the notes to but excluding the conversion date. The Company may not redeem the notes prior to January 19, 2017, other than in connection with certain changes in the tax law of a relevant taxing jurisdiction that results in additional amounts becoming due with respect to payments and/or deliveries on the note. On or after January 19, 2017 and prior to the maturity date, the Company may redeem for cash all or part of the notes at a redemption price equal to 100% of the principal amount of the notes to be redeemed, plus accrued and unpaid interest to, but excluding, the redemption date. No sinking fund is provided for the notes. If the Company undergoes a fundamental change, holders may require the Company to repurchase for cash all or part of their notes at a repurchase price equal to 100% of the principal amount of the notes to be repurchased, plus accrued and unpaid interest to, but excluding, the fundamental change repurchase date. The notes are the Company’s senior unsecured obligations and rank senior in right of payment to the Company’s future indebtedness that is expressly subordinated in right of payment to the notes and equal in right of payment to the Company’s future unsecured indebtedness that is not so subordinated. The notes are effectively in right of payment to future secured indebtedness to the extent of the value of the assets securing such indebtedness.

(16) Subsequent Event

In January 2012, the Company completed the sale of $150.0 million in aggregate principal amount of 3.5% Convertible Senior Notes due 2032. The notes were issued by Corsicanto Limited, an Irish limited company acquired by Amarin in January 2012. Corsicanto Limited is a wholly-owned subsidiary of Amarin Corporation plc. The general, unsecured, senior obligations are guaranteed by the parent. Net proceeds to us, after payment of underwriting fees and estimated expenses, were approximately $144.3 million. The notes bear cash interest at a rate of 3.5% per year, payable semiannually in arrears on January 15 and July 15 of each year, beginning on July 15, 2012 and mature on January 15, 2032. The notes are subject to repurchase by us at the option of the holders on each of January 19, 2017, January 19, 2022, and January 19, 2027, at a price equal to 100% of the principal amount of the notes to be repurchased, plus accrued and unpaid interest to, but excluding, the fundamental change repurchase date.

Holders may convert their notes at their option at any time prior to the close of business on the business day immediately preceding October 15, 2031 only under the following circumstances: (1) during any calendar quarter commencing after March 31, 2012 (and only during such calendar quarter), if the last reported sale price of the Company’s common stock for at least 20 trading days (whether or not consecutive) during a period of 30 consecutive trading days ending on the last trading day of the immediately preceding calendar quarter is greater than or equal to 130% of the conversion price on each applicable trading day; (2) during the five the consecutive business day period immediately following any five consecutive trading day period, or the measurement period, in which the trading price per $1,000 principal amount of notes for each trading day of the measurement period was less than 98% of the product of the last reported sale price of the Company’s common stock and the conversion rate on each such trading day; (3) if the Company calls any or all of the notes for redemption, at any time prior to the close of business on the scheduled trading day immediately preceding the redemption date; or (4) upon the occurrence of specified corporate events. On or after October 15, 2031 until the close of business on the second scheduled trading day immediately preceding the maturity date, holders may convert their notes at any time, regardless of the foregoing conditions have been satisfied. Upon conversion, the Company will pay or deliver, as the case may be, cash, shares of its common stock (and cash in lieu of any fractional share) or a combination of cash and shares of its common stock, at the Company’s election. The conversion rate will initially be 113.4572 shares of common stock per $1,000 principal amount of notes (equivalent to an initial conversion price of approximately $8.8125 per share of common stock). The conversion rate will be subject to adjustment in some events but will not be adjusted for any accrued and unpaid interest. In addition, following certain corporate events that occur prior to the maturity date, the Company will increase the conversion rate for a holder who elects to convert its notes in connection with such a corporate event in certain circumstances and will pay to such holder any accrued and unpaid interest on the notes to but excluding the conversion date.

The Company may not redeem the notes prior to January 19, 2017, other than in connection with certain changes in the tax law of a relevant taxing jurisdiction that results in additional amounts becoming due with respect to payments and/or deliveries on the note. On or after January 19, 2017 and prior to the maturity date, the Company may redeem for cash all or part of the notes at a redemption price equal to 100% of the principal amount of the notes to be redeemed, plus accrued and unpaid interest to, but excluding, the redemption date. No sinking fund is provided for the notes. If the Company undergoes a fundamental change, holders may require the Company to repurchase for cash all or part of their notes at a repurchase price equal to 100% of the principal amount of the notes to be repurchased, plus accrued and unpaid interest to, but excluding, the fundamental change repurchase date. The notes are the Company’s senior unsecured obligations and rank senior in right of payment to the Company’s future indebtedness that is expressly subordinated in right of payment to the notes and equal in right of payment to the Company’s future unsecured indebtedness that is not so subordinated. The notes are effectively in right of payment to future secured indebtedness to the extent of the value of the assets securing such indebtedness.