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INCOME TAXES (Narrative) (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended |
--- | --- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2012
Income Taxes [Line Items] |  |  |
Cash paid for income taxes | $ 17 us-gaap_IncomeTaxesPaid | $ 3 us-gaap_IncomeTaxesPaid |
Liability for other uncertain income tax positions | 16 us-gaap_UnrecognizedTaxBenefits | 16 us-gaap_UnrecognizedTaxBenefits | 16 us-gaap_UnrecognizedTaxBenefits
Impairment of goodwill | 374 us-gaap_GoodwillImpairmentLoss |  |
Alternative Minimum Tax Credit Carryforward [Member] |  |  |
Income Taxes [Line Items] |  |  |
Tax credit carryforwards | 58 us-gaap_TaxCreditCarryforwardAmount / us-gaap_TaxCreditCarryforwardAxis = basi_AlternativeMinimumTaxCreditCarryforwardMember |  |
Foreign Tax Authority [Member] |  |  |
Income Taxes [Line Items] |  |  |
Net operating loss carry forwards |  | 8,626 us-gaap_OperatingLossCarryforwards / us-gaap_IncomeTaxAuthorityAxis = us-gaap_ForeignCountryMember |
Internal Revenue Service (IRS) [Member] |  |  |
Income Taxes [Line Items] |  |  |
Net operating loss carry forwards | 11,959 us-gaap_OperatingLossCarryforwards / us-gaap_IncomeTaxAuthorityAxis = us-gaap_InternalRevenueServiceIRSMember |  |
Valuation allowance | 1,718 us-gaap_OperatingLossCarryforwardsValuationAllowance / us-gaap_IncomeTaxAuthorityAxis = us-gaap_InternalRevenueServiceIRSMember | 2,286 us-gaap_OperatingLossCarryforwardsValuationAllowance / us-gaap_IncomeTaxAuthorityAxis = us-gaap_InternalRevenueServiceIRSMember |
Internal Revenue Service (IRS) [Member] | Earliest Tax Year [Member] |  |  |
Income Taxes [Line Items] |  |  |
Expirations of operating loss carry forwards | Sep. 30, 2015 |  |
Internal Revenue Service (IRS) [Member] | Latest Tax Year [Member] |  |  |
Income Taxes [Line Items] |  |  |
Expirations of operating loss carry forwards | Sep. 30, 2032 |  |
State [Member] |  |  |
Income Taxes [Line Items] |  |  |
Net operating loss carry forwards | $ 15,744 us-gaap_OperatingLossCarryforwards / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember |  |
State [Member] | Earliest Tax Year [Member] |  |  |
Income Taxes [Line Items] |  |  |
Expirations of operating loss carry forwards | Sep. 30, 2015 |  |
State [Member] | Latest Tax Year [Member] |  |  |
Income Taxes [Line Items] |  |  |
Expirations of operating loss carry forwards | Sep. 30, 2032 |  |

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- Definition Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13854-109267 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13777-109266 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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- Definition The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4297-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3536-108585 + Details
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- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319 + Details
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- Definition The portion of the valuation allowance pertaining to the deferred tax asset representing potential future taxable deductions from net operating loss carryforwards for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 30 -Paragraph 5 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=6907311&loc=d3e30536-109315 + Details
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- Definition The amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Carryforwards -URI http://asc.fasb.org/extlink&oid=6506874 + Details
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