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Note 14 - Acquisitions - Average Useful Lives of Identifiable Intangible Assets Acquired (Details) | 6 Months Ended
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Jun. 30, 2022
Woorank SRL ([Member] | Computer Software, Intangible Asset [Member] |
Acquired intangible assets, useful life (Year) | 5 years
Woorank SRL ([Member] | Customer Relationships [Member] |
Acquired intangible assets, useful life (Year) | 8 years
Woorank SRL ([Member] | Domain And Trade Names [Member] |
Acquired intangible assets, useful life (Year) | 12 years
Hawk Search [Member] | Computer Software, Intangible Asset [Member] |
Acquired intangible assets, useful life (Year) | 5 years
Hawk Search [Member] | Customer Relationships [Member] |
Acquired intangible assets, useful life (Year) | 10 years
Hawk Search [Member] | Domain And Trade Names [Member] |
Acquired intangible assets, useful life (Year) | 15 years

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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI https://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
Name: | us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_BusinessAcquisitionAxis=blin_WoorankSRLMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_ComputerSoftwareIntangibleAssetMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_CustomerRelationshipsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=blin_DomainAndTradeNamesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=blin_HawkSearchMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |