XML 37 R23.htm IDEA: XBRL DOCUMENT
v3.4.0.3

Note 4 - Royalty Monetization (Details Textual) |  | 3 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Mar. 09, 2011 USD ($) | Mar. 31, 2016 USD ($) | Mar. 31, 2015 USD ($) | Mar. 31, 2016 JPY (¥) | Dec. 31, 2015 USD ($) | Sep. 30, 2015 | Dec. 31, 2013 USD ($)
PhaRMA Notes Member] | JPR Royalty Sub LLC [Member] | Currency Hedge Agreement [Member] |  |  |  |  |  |  |
Collateral Already Posted, Aggregate Fair Value |  | $ 0 | $ 0 |  |  |  |
Maximum Amount of Collateral Required to Post |  |  |  |  | $ 9,750,000 |  |
PhaRMA Notes Member] | JPR Royalty Sub LLC [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |  |  |  |
Notes Payable, Fair Value Disclosure |  |  |  |  |  |  | $ 30,000,000
PhaRMA Notes Member] | JPR Royalty Sub LLC [Member] |  |  |  |  |  |  |
Private Placement of Senior Secured Notes | $ 30,000,000 |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage | 14.00% |  |  |  |  |  |
PhaRMA Notes Member] | Currency Hedge Agreement [Member] | Japan, Yen [Member] |  |  |  |  |  |  |
Derivative, Forward Exchange Rate |  |  |  |  |  | 100 |
PhaRMA Notes Member] | Currency Hedge Agreement [Member] |  |  |  |  |  |  |
Payments for (Proceeds from) Hedge, Investing Activities |  | $ 1,950,000 |  |  |  |  |
Required Foreign Currency Hedge Per Dollar | ¥ |  |  |  | ¥ 100 |  |  |
PhaRMA Notes Member] | JPR Royalty Sub LLC [Member] |  |  |  |  |  |  |
Percentage of Carrying Amount in Excess of Fair Value |  | 50.00% |  | 50.00% |  |  |
JPR Royalty Sub LLC [Member] | Royalty Monetization [Member] |  |  |  |  |  |  |
Revenue Recognition Royalty and Milestone Revenue Recognized | $ 30,000,000 |  |  |  |  |  |
Revenue Recognition Royalty And Milestone Revenue Recognized, Net | 22,691,000 |  |  |  |  |  |
Transaction Costs | 4,309,000 |  |  |  |  |  |
Interest Reserve | 3,000,000 |  |  |  |  |  |
Currency Hedge Agreement [Member] |  |  |  |  |  |  |
Collateral Already Posted, Aggregate Fair Value |  | $ 0 |  |  | $ 0 |  |
Foreign Exchange Contract [Member] | Not Designated as Hedging Instrument [Member] |  |  |  |  |  |  |
Derivative, Loss on Derivative |  | $ 2,753,000 |  |  |  |  |
Derivative, Gain on Derivative |  |  | $ 464,000 |  |  |  |
JPR Royalty Sub LLC [Member] |  |  |  |  |  |  |
Revenue Recognition Royalty and Milestone Revenue Recognized | $ 30,000,000 |  |  |  |  |  |

X
- Definition Represents interest reserve established as part of the royalty monetization. + References No definition available. + Details
Name: | bcrx_Interestreserve
Namespace Prefix: | bcrx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents maximum amount of collateral required to post. + References No definition available. + Details
Name: | bcrx_MaximumAmountOfCollateralRequiredToPost
Namespace Prefix: | bcrx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the percentage of carrying amount in excess of fair value. + References No definition available. + Details
Name: | bcrx_PercentageOfCarryingAmountInExcessOfFairValue1
Namespace Prefix: | bcrx_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents private placement of senior secured notes. + References No definition available. + Details
Name: | bcrx_PrivatePlacementOfSeniorSecuredNotes
Namespace Prefix: | bcrx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The Company is required to maintain a foreign currency hedge per dollar under the agreements governing the PhaRMA Notes. + References No definition available. + Details
Name: | bcrx_RequiredForeignCurrencyHedgePerDollar
Namespace Prefix: | bcrx_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents revenue recognition royalty and milestone revenue recognized, net. + References No definition available. + Details
Name: | bcrx_RevenueRecognitionRoyaltyAndMilestoneRevenueRecognizedNet
Namespace Prefix: | bcrx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Revenue recognition royalty and milestone revenue recognized. + References No definition available. + Details
Name: | bcrx_RevenuerecognitionRoyaltyAndMilestoneRevenueRecognized
Namespace Prefix: | bcrx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents transaction costs associated with royalty monetization. + References No definition available. + Details
Name: | bcrx_TransactionCosts
Namespace Prefix: | bcrx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The aggregate fair value of assets that are already posted, at the end of the reporting period, as collateral for derivative instruments with credit-risk-related contingent features. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4H -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5624258-113959 + Details
Name: | us-gaap_CollateralAlreadyPostedAggregateFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Contractual rate at which a foreign currency can be purchased or sold. + References No definition available. + Details
Name: | us-gaap_DerivativeForwardExchangeRate1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of increase in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (a),(c),(d),(e) -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5624171-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5618551-113959 + Details
Name: | us-gaap_DerivativeGainOnDerivative
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of decrease in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5618551-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (a),(c),(d),(e) -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5624171-113959 + Details
Name: | us-gaap_DerivativeLossOnDerivative
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Fair value portion of notes payable. + References Reference 1: 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 + Details
Name: | us-gaap_NotesPayableFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The cash outflow or inflow for a financial contract that meets the hedge criteria as either a cash flow hedge, fair value hedge, or hedge of a net investment in a foreign operation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 27 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3581-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3098-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3095-108585 + Details
Name: | us-gaap_PaymentsForProceedsFromHedgeInvestingActivities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_DebtInstrumentAxis=bcrx_PhaRMANotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis=bcrx_JPRRoyaltySubLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=bcrx_CurrencyHedgeAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CurrencyAxis=bcrx_JapanYenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=bcrx_JPRRoyaltySubLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_OtherCommitmentsAxis=bcrx_RoyaltyMonetizationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_ForeignExchangeContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_HedgingDesignationAxis=us-gaap_NondesignatedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |