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Note 7 - Accrued Restructuring Liabilities (Details) - USD ($) $ in Thousands | Mar. 31, 2016 | Sep. 30, 2015
--- | --- | ---
Facilities and Related [Member] |  |
Accrued restructuring liabilities | $ 279 | $ 259
Employee Severance [Member] |  |
Accrued restructuring liabilities | 395 |
Other Restructuring Costs [Member] |  |
Accrued restructuring liabilities | 64 | $ 48
Accrued restructuring liabilities | $ 738 | $ 307

X
- Definition Carrying amount as of the balance sheet date pertaining to accrued restructuring liabilities. + References No definition available. + Details
Name: | blin_AccruedRestructuringLiabilities
Namespace Prefix: | blin_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
Name: | us-gaap_RestructuringCostAndReserveAxis=blin_FacilitiesAndRelatedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RestructuringCostAndReserveAxis=us-gaap_EmployeeSeveranceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RestructuringCostAndReserveAxis=blin_OtherRestructuringCostsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |