Debt (Details) (USD $)
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0 Months Ended |
12 Months Ended |
0 Months Ended |
1 Months Ended |
0 Months Ended |
Aug. 18, 2014
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Jul. 22, 2013
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Sep. 28, 2012
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Dec. 31, 2014
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 15, 2014
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Jun. 29, 2012
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Jun. 30, 2014
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Dec. 27, 2012
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Debt |
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Net proceeds from issuance of common stock (in shares) |
10,235,000us-gaap_StockIssuedDuringPeriodSharesNewIssues |
6,900,000us-gaap_StockIssuedDuringPeriodSharesNewIssues |
6,304,102us-gaap_StockIssuedDuringPeriodSharesNewIssues |
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Shares price (in dollars per share) |
$ 11.25us-gaap_SharePrice |
$ 10.40us-gaap_SharePrice |
$ 4.07us-gaap_SharePrice |
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Proceeds from issuance of common stock |
$ 108,000,000us-gaap_ProceedsFromIssuanceOfCommonStock |
$ 67,000,000us-gaap_ProceedsFromIssuanceOfCommonStock |
$ 25,700,000us-gaap_ProceedsFromIssuanceOfCommonStock |
$ 109,013,000us-gaap_ProceedsFromIssuanceOfCommonStock |
$ 67,017,000us-gaap_ProceedsFromIssuanceOfCommonStock |
$ 25,658,000us-gaap_ProceedsFromIssuanceOfCommonStock |
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Debt: |
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Notes payable |
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25,000,000us-gaap_SecuredDebt |
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Accretion of end of term charge |
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314,000insm_AdditionalChargeAtEndOfTerm |
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Issuance fees paid to lender |
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(308,000)us-gaap_UnamortizedDebtIssuanceExpense |
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Discount from warrant |
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(150,000)insm_UnamortizedDiscountFromWarrant |
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Long-term debt |
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24,856,000us-gaap_LongTermDebtNoncurrent |
16,338,000us-gaap_LongTermDebtNoncurrent |
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Future principal repayments of the Notes |
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2016 |
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25,000,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo |
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Total |
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25,000,000us-gaap_LongTermDebt |
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Hercules |
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Debt |
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Net proceeds from issuance of common stock (in shares) |
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70,771us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_PrivatePlacementMember |
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Shares price (in dollars per share) |
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$ 14.13us-gaap_SharePrice / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_PrivatePlacementMember |
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Proceeds from issuance of common stock |
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1,000,000us-gaap_ProceedsFromIssuanceOfCommonStock / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_PrivatePlacementMember |
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Loan and Security Agreement |
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Debt |
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Maximum borrowing capacity of term loan |
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25,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_DebtInstrumentAxis = us-gaap_LineOfCreditMember |
20,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_DebtInstrumentAxis = us-gaap_LineOfCreditMember |
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Number of Secured Promissory Notes |
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2insm_NumberOfSecuredPromissoryNotes / us-gaap_DebtInstrumentAxis = us-gaap_LineOfCreditMember |
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Period over which principal payment could be delayed |
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5 months |
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Fee paid to extend the interest-only period |
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100,000insm_DebtInstrumentFeePaidToExtendInterestOnlyPeriod / us-gaap_DebtInstrumentAxis = us-gaap_LineOfCreditMember |
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Commitment fee |
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25,000us-gaap_LineOfCreditFacilityCommitmentFeeAmount / us-gaap_DebtInstrumentAxis = us-gaap_LineOfCreditMember |
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Facility fee |
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125,000insm_LineOfCreditFacilityFacilityFee / us-gaap_DebtInstrumentAxis = us-gaap_LineOfCreditMember |
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Increase in borrowing capacity |
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5,000,000insm_LineOfCreditFacilityIncreaseInBorrowingCapacity / us-gaap_DebtInstrumentAxis = us-gaap_LineOfCreditMember |
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Amount of cash proceeds required to extend maturity date of loan |
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90,000,000insm_LineOfCreditFacilityThresholdAmountOfCashProceedsFromEquityFinancings / us-gaap_DebtInstrumentAxis = us-gaap_LineOfCreditMember |
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Maturity date extension fee |
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250,000insm_FeePaymentOnLoanMaturityExtension / us-gaap_DebtInstrumentAxis = us-gaap_LineOfCreditMember |
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"End of term" charge |
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390,000insm_EndOfTermCharge / us-gaap_DebtInstrumentAxis = us-gaap_LineOfCreditMember |
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Additional interest rate in event of default (as a percent) |
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5.00%insm_AdditionalInterestRateToOutstandingLoanBalances / us-gaap_DebtInstrumentAxis = us-gaap_LineOfCreditMember |
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Limit on lender's participation rights in certain future private equity financings |
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1,000,000insm_MaximumAmountOfSubsequentPrivateFinancingOfEquitySecurities / us-gaap_DebtInstrumentAxis = us-gaap_LineOfCreditMember |
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Notes |
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Debt |
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Interest rate (as a percent) |
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9.25%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = insm_NoteAAndNoteBMember |
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Note A |
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Debt |
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Incremental amount of term loan |
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10,000,000insm_IncrementalAmountOfTermLoan / us-gaap_DebtInstrumentAxis = insm_NoteAMember |
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Period over which note is to be repaid |
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42 months |
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Payment periods representing interest only |
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12 months |
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Periods of equal payment of principal and interest |
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30 months |
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Note B |
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Debt |
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Incremental amount of term loan |
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$ 10,000,000insm_IncrementalAmountOfTermLoan / us-gaap_DebtInstrumentAxis = insm_NoteBMember |
Period over which note is to be repaid |
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36 months |
Payment periods representing interest only |
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6 months |
Periods of equal payment of principal and interest |
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30 months |