For contingent consideration arrangements recognized in connection with a business combination, this element represents a description of such arrangements.

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- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Balance Type:	credit
Period Type:	instant

- Definition

The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

+ References

No definition available.

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Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

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Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

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Balance Type:	na
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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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Balance Type:	na
Period Type:	duration

- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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Balance Type:	na
Period Type:	duration

- Definition

Amount of the required periodic payments including both interest and principal payments.

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Namespace Prefix:	us-gaap_
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Balance Type:	credit
Period Type:	instant

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

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Namespace Prefix:	us-gaap_
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Balance Type:	credit
Period Type:	instant

- Details

Name:	basi_CreditArrangementsAxis=basi_CreditArrangementsMember
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Name:	us-gaap_ShortTermDebtTypeAxis=basi_EquipmentDrawLoanMember
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Balance Type:
Period Type:

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Name:	us-gaap_ShortTermDebtTypeAxis=basi_ConstructionDrawLoanMember
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Balance Type:
Period Type:

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=basi_FirstInternetBankOfIndianaMember
Namespace Prefix:
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Balance Type:
Period Type:

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Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
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Name:	us-gaap_DebtInstrumentAxis=basi_SubsequentTermLoanMember
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DEBT (Details Textual) - USD ($) $ in Thousands	1 Months Ended		3 Months Ended
DEBT (Details Textual) - USD ($) $ in Thousands	Sep. 28, 2018	Jul. 02, 2018	Dec. 31, 2018
Credit Arrangements [Member]
Debt Instrument [Line Items]
Business Combination, Contingent Consideration Arrangements, Description	The Credit Agreement also requires us to maintain (i) a minimum debt service coverage ratio of not less than 1.25 to 1.0 and (ii) a cash flow coverage ratio whereby, the ratio of the Company’s total funded debt (as defined in the Credit Agreement) as of the last day of each fiscal quarter to its EBITDA (as defined in the Credit Agreement) for the 12 months ended on such date may not exceed 4.50 to 1.00.
Equipment Draw Loan [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date	Mar. 28, 2025
Long-term Debt			$ 0
Line of Credit Facility, Maximum Borrowing Capacity	$ 1,429
Construction Draw Loan [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date	Mar. 28, 2025
Long-term Debt			0
Line of Credit Facility, Maximum Borrowing Capacity	$ 4,445
First Internet Bank of Indiana [Member]
Debt Instrument [Line Items]
Debt Instrument, Periodic Payment			$ 33
Debt Instrument, Interest Rate, Stated Percentage			3.99%
Debt Instrument, Face Amount			$ 4,500
Long-term Debt, Gross			4,165
First Internet Bank of Indiana [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity			$ 3,500
Debt Instrument, Description of Variable Rate Basis			less Twenty-five (25) Basis Points (0.25%).
Long-term Line of Credit			$ 0
Subsequent Term Loan [Member] \| First Internet Bank of Indiana [Member]
Debt Instrument [Line Items]
Debt Instrument, Periodic Payment		$ 78
Debt Instrument, Interest Rate, Stated Percentage		5.06%
Debt Instrument, Face Amount		$ 5,500
Debt Instrument, Maturity Date		Jul. 02, 2023
Long-term Debt		$ 5,226
Current Credit Agreement [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			5.20%