2.4.0.81070 - Disclosure - Debttruefalsefalse1false falsefalseD2013Q2YTDhttp://www.sec.gov/CIK0001274792duration2013-01-01T00:00:002013-06-30T00:00:001true 1us-gaap_DebtDisclosureAbstractus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Debt2false 2us-gaap_DebtDisclosureTextBlockus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00<div style="font-size:10.0pt;font-family:Times New Roman;"> 7. Debt   In November 2012, the Company entered into a Loan and Security Agreement (the “Loan Agreement”) with Hercules Technology Growth Capital, Inc. (“Hercules”) pursuant to which the Company received loans in the aggregate principal amount of $40.0 million in 2012. The Company’s obligations associated with the Loan Agreement are secured by a security interest in all of the Company’s personal property now owned or hereafter acquired, excluding intellectual property but including the proceeds from the sale, if any, of intellectual property, and a negative pledge on intellectual property.   The Loan Agreement provides for interest-only payments for twelve months and repayment of the aggregate outstanding principal balance of the loans in monthly installments starting on December 1, 2013 and continuing through May 1, 2016. However, if the Company receives aggregate gross proceeds of at least $75 million in one or more transactions prior to December 1, 2013, the Company may elect to extend the interest-only period by six months so that the aggregate outstanding principal balance of the loans would be repaid in monthly installments starting on June 1, 2014 and continuing through November 1, 2016.   For the three and six months ended June 30, 2013, interest expense related to the outstanding principal balance of the loans was $1.0 million and $2.1 million, respectively. Upon full repayment or maturity of the loans, the Company is required to pay a fee of $1.2 million, which is recorded as a non-current liability on the condensed consolidated balance sheets.   As of June 30, 2013, the Company had outstanding borrowings of $38.8 million, net of debt discounts of $1.2 million. Amortization of the debt discounts, which are recorded as interest expense, was $0.2 million and $0.3 million for the three and six months ended June 30, 2013, respectively.   In December 2012, as described in Note 2 “—Derivative Liability,” the Company’s majority owned subsidiary, Silver Creek, entered into a Note Purchase Agreement pursuant to which it issued convertible notes to various lenders in aggregate principal amounts of $1.6 million in December 2012 and $0.3 million in February 2013. As of June 30, 2013, Silver Creek had outstanding borrowings of $1.7 million, net of debt discounts of $0.1 million. Amortization of the debt discounts, which are recorded as interest expense, was $0.1 million for both the three and six month periods ended June 30, 2013.   As described in Note 11, in July 2013, the Company completed a concurrent Common Stock Offering and Convertible Notes Offering.   </div>falsefalsefalsenonnum:textBlockItemTypenaThe entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 20, 22 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 2, 4 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19,20,22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 false0DebtfalseDebtUnKnownUnKnownUnKnownUnKnowntruefalsefalseSheethttp://www.merrimackpharma.com/role/DisclosureDebt12