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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Schedule of Assumptions Used to Compute Fair Value of Warrants) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified | 0 Months Ended | 12 Months Ended |
--- | --- | --- | ---
May 11, 2011 | Sep. 30, 2014 | Sep. 30, 2013 | May 31, 2012
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |  |  |
Fair value of warrant liability |  | $ 676 us-gaap_DerivativeLiabilitiesCurrent | $ 612 us-gaap_DerivativeLiabilitiesCurrent |
Class B Warrant [Member] |  |  |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |  |  |
Fair value of warrant liability |  |  |  | $ 0 us-gaap_DerivativeLiabilitiesCurrent / us-gaap_ClassOfWarrantOrRightAxis = basi_ClassBWarrantMember
Derivative Financial Instruments, Liabilities [Member] | Class A Warrant [Member] |  |  |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |  |  |
Risk-free interest rate | 1.87%us-gaap_FairValueAssumptionsRiskFreeInterestRate / us-gaap_ClassOfWarrantOrRightAxis = basi_ClassAWarrantMember / us-gaap_FairValueByLiabilityClassAxis = us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember | 0.41%us-gaap_FairValueAssumptionsRiskFreeInterestRate / us-gaap_ClassOfWarrantOrRightAxis = basi_ClassAWarrantMember / us-gaap_FairValueByLiabilityClassAxis = us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember | 0.51%us-gaap_FairValueAssumptionsRiskFreeInterestRate / us-gaap_ClassOfWarrantOrRightAxis = basi_ClassAWarrantMember / us-gaap_FairValueByLiabilityClassAxis = us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember |
Dividend yield | 0.00%us-gaap_FairValueAssumptionsExpectedDividendRate / us-gaap_ClassOfWarrantOrRightAxis = basi_ClassAWarrantMember / us-gaap_FairValueByLiabilityClassAxis = us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember | 0.00%us-gaap_FairValueAssumptionsExpectedDividendRate / us-gaap_ClassOfWarrantOrRightAxis = basi_ClassAWarrantMember / us-gaap_FairValueByLiabilityClassAxis = us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember | 0.00%us-gaap_FairValueAssumptionsExpectedDividendRate / us-gaap_ClassOfWarrantOrRightAxis = basi_ClassAWarrantMember / us-gaap_FairValueByLiabilityClassAxis = us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember |
Volatility of the Company's common stock | 106.91%us-gaap_FairValueAssumptionsExpectedVolatilityRate / us-gaap_ClassOfWarrantOrRightAxis = basi_ClassAWarrantMember / us-gaap_FairValueByLiabilityClassAxis = us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember | 63.58%us-gaap_FairValueAssumptionsExpectedVolatilityRate / us-gaap_ClassOfWarrantOrRightAxis = basi_ClassAWarrantMember / us-gaap_FairValueByLiabilityClassAxis = us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember | 71.15%us-gaap_FairValueAssumptionsExpectedVolatilityRate / us-gaap_ClassOfWarrantOrRightAxis = basi_ClassAWarrantMember / us-gaap_FairValueByLiabilityClassAxis = us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember |
Expected life of the options | 5 years | 1 year 7 months 6 days | 2 years 7 months 6 days |
Fair value per unit | $ 1.433 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue / us-gaap_ClassOfWarrantOrRightAxis = basi_ClassAWarrantMember / us-gaap_FairValueByLiabilityClassAxis = us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember | $ 0.846 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue / us-gaap_ClassOfWarrantOrRightAxis = basi_ClassAWarrantMember / us-gaap_FairValueByLiabilityClassAxis = us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember | $ 0.444 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue / us-gaap_ClassOfWarrantOrRightAxis = basi_ClassAWarrantMember / us-gaap_FairValueByLiabilityClassAxis = us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember |
Derivative Financial Instruments, Liabilities [Member] | Class B Warrant [Member] |  |  |  |
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |  |  |
Risk-free interest rate | 0.18%us-gaap_FairValueAssumptionsRiskFreeInterestRate / us-gaap_ClassOfWarrantOrRightAxis = basi_ClassBWarrantMember / us-gaap_FairValueByLiabilityClassAxis = us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember |  |  |
Dividend yield | 0.00%us-gaap_FairValueAssumptionsExpectedDividendRate / us-gaap_ClassOfWarrantOrRightAxis = basi_ClassBWarrantMember / us-gaap_FairValueByLiabilityClassAxis = us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember |  |  |
Volatility of the Company's common stock | 116.01%us-gaap_FairValueAssumptionsExpectedVolatilityRate / us-gaap_ClassOfWarrantOrRightAxis = basi_ClassBWarrantMember / us-gaap_FairValueByLiabilityClassAxis = us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember |  |  |
Expected life of the options | 1 year |  |  |
Fair value per unit | $ 0.779 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue / us-gaap_ClassOfWarrantOrRightAxis = basi_ClassBWarrantMember / us-gaap_FairValueByLiabilityClassAxis = us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember |  |  |

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- Definition Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled within one year or normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Current Liabilities -URI http://asc.fasb.org/extlink&oid=6509677 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13433-108611 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13495-108611 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=34720828&loc=SL20225862-175312 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41271-113958 + Details
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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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