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SALE OF PREFERRED SHARES AND WARRANTS (Narrative) (Details) (USD $) | 0 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
May 11, 2011 | Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2012
Schedule Of Stock And Warrants By Class [Line Items] |  |  |  |
Units issued during period, new issues, shares | 5,506 basi_UnitsIssuedDuringPeriodSharesNewIssues |  |  |
Units issued, price per unit | $ 1,000 us-gaap_SharesIssuedPricePerShare |  |  |
Proceeds from equity issuance | $ 4,600,000 us-gaap_ProceedsFromOtherEquity |  |  |
Fair value of warrants | 3,045,000 us-gaap_WarrantsAndRightsOutstanding |  |  |
Common stock, price per share | $ 1.86 us-gaap_SharePrice |  |  |
Warrants exercised |  | 577,897 basi_ClassOfWarrantOrRightExercises |  |
Accrued dividends payable |  | 0 us-gaap_DividendsPayableCurrentAndNoncurrent |  |
Class A Warrant [Member] |  |  |  |
Schedule Of Stock And Warrants By Class [Line Items] |  |  |  |
Number of shares called by each warrant |  | 250 us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight / us-gaap_ClassOfWarrantOrRightAxis = basi_ClassAWarrantMember |  |
Exercise price of warrant |  | $ 2.00 us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 / us-gaap_ClassOfWarrantOrRightAxis = basi_ClassAWarrantMember |  |
Fair value of warrants | 1,973,000 us-gaap_WarrantsAndRightsOutstanding / us-gaap_ClassOfWarrantOrRightAxis = basi_ClassAWarrantMember | 676,000 us-gaap_WarrantsAndRightsOutstanding / us-gaap_ClassOfWarrantOrRightAxis = basi_ClassAWarrantMember | 612,000 us-gaap_WarrantsAndRightsOutstanding / us-gaap_ClassOfWarrantOrRightAxis = basi_ClassAWarrantMember | 1,213,000 us-gaap_WarrantsAndRightsOutstanding / us-gaap_ClassOfWarrantOrRightAxis = basi_ClassAWarrantMember
Warrants outstanding |  | 798,603 us-gaap_ClassOfWarrantOrRightOutstanding / us-gaap_ClassOfWarrantOrRightAxis = basi_ClassAWarrantMember |  |
Class B Warrant [Member] |  |  |  |
Schedule Of Stock And Warrants By Class [Line Items] |  |  |  |
Number of shares called by each warrant |  | 250 us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight / us-gaap_ClassOfWarrantOrRightAxis = basi_ClassBWarrantMember |  |
Exercise price of warrant |  | $ 2.00 us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 / us-gaap_ClassOfWarrantOrRightAxis = basi_ClassBWarrantMember |  |
Fair value of warrants | 1,072,000 us-gaap_WarrantsAndRightsOutstanding / us-gaap_ClassOfWarrantOrRightAxis = basi_ClassBWarrantMember |  |  |
Series A Preferred Stock [Member] |  |  |  |
Schedule Of Stock And Warrants By Class [Line Items] |  |  |  |
Dividend rate |  | 6.00%us-gaap_PreferredStockDividendRatePercentage / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember |  |
Shares issued upon conversion of securities |  | 500 us-gaap_ConvertiblePreferredStockSharesIssuedUponConversion / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember |  |
"Make-whole" payment |  | 180 basi_ContingentPaymentUponConversionOfStock / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember |  |
Preferred stock, stated value per share |  | $ 1,000 us-gaap_PreferredStockParOrStatedValuePerShare / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember | $ 1,000 us-gaap_PreferredStockParOrStatedValuePerShare / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember |
Preferred stock, shares outstanding |  | 1,185 us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember | 1,335 us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember |
Aggregate number of shares issued upon conversion of securities | 2,753,000 basi_ConvertiblePreferredStockAggregateSharesIssuedUponConversion / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember |  |  |
Total possible dividend percentage over three years | 18.00%basi_PreferredStockTotalPossibleDividendPercentageOverThreeYears / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember |  |  |
Preferred stock - recognition of full dividend/make-whole | 991,080 us-gaap_DividendsPreferredStock / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember |  |  |
Fair value of outstanding preferred stock | 6,112,000 basi_PreferredStockOutstandingFairValue / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember |  |  |
Gross proceeds from equity issuance | 5,506,000 basi_GrossProceedsFromIssuanceOfEquity / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember |  |  |
Beneficial conversion feature | 2,461,000 basi_PreferredStockBeneficialConversionFeature / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember |  |  |
Deemed dividend | $ 5,506,000 basi_PreferredStockDeemedDividend / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember |  |  |
Shares converted |  | 4,321 us-gaap_ConversionOfStockSharesConverted1 / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember |  |
Common stock, shares issued in conversion |  | 2,564,108 us-gaap_ConversionOfStockSharesIssued1 / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember |  |
Common stock, shares issued for dividends |  | 217,366 us-gaap_CommonStockDividendsShares / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember |  |

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- Definition Element represents the contengent "make-whole" payment to holders of converted stock, based on the date of conversion and stated value of the shares. + References No definition available. + Details
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- Definition Number of shares issued for all shares of convertible preferred stock that is converted. + References No definition available. + Details
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- Definition This element represents the difference between the proceeds from issuances of convertible preferred stock and the fair value of the common stock into which the shares convert, as of the issuance date. + References No definition available. + Details
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- Definition This element represents a tax instrument used to shift a tax liability from shareholder's incurred from the beneficial conversion feature of preferred stock. + References No definition available. + Details
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- Definition Element represents the aggregate fair value of outstanding shares of preferred stock. + References No definition available. + Details
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- Definition Element represents the total dividend percent that could be paid out over a three year period. + References No definition available. + Details
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- Definition Exercise price per share or per unit of warrants or rights outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)(4)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition Number of securities into which each warrant or right may be converted. For example, but not limited to, each warrant may be converted into two shares. + References No definition available. + Details
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- Definition Number of warrants or rights outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph i -Article 4 + Details
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- Definition Number of shares of common stock issued as dividends during the period. Excludes stock splits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 + Details
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- Definition The number of shares converted in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4313-108586 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 + Details
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- Definition The number of new shares issued in the conversion of stock in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4313-108586 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 + Details
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- Definition Number of shares issued for each share of convertible preferred stock that is converted. + References 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 29 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21506-112644 + Details
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- Definition Carrying value as of the balance sheet date of dividends declared but unpaid on equity securities issued by the entity and outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.15(5)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 15 -Subparagraph a -Article 7 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 15 -Subparagraph 5 -Article 9 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.15(5)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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- Definition Amount of paid and unpaid preferred stock dividends declared with the form of settlement in cash, stock and payment-in-kind (PIK). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 405 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6957935&loc=d3e64057-112817 + Details
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- Definition Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer. + 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 210.5-02.28) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29 -Article 5 + Details
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- Definition Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased. + 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 210.5-02.28) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29 -Article 5 + Details
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- Definition Value of outstanding derivative securities that permit the holder the right to purchase securities (usually equity) from the issuer at a specified price. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph i -Article 4 + Details
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