XML 46 R36.htm IDEA: XBRL DOCUMENT
v3.23.1

Note 3 - Revenue - Disaggregation of Revenue by Product Group and Sales Channel (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2023 | Mar. 31, 2022
Net sales | $ 172,344 | $ 136,718
Sales Channel, Directly to Consumer [Member] |  |
Net sales | 120,750 | 87,635
Sales Channel, Through Intermediary [Member] |  |
Net sales | 51,594 | 49,083
Connectivity Solutions [Member] |  |
Net sales | 53,396 | 43,713
Connectivity Solutions [Member] | Sales Channel, Directly to Consumer [Member] |  |
Net sales | 33,725 | 26,053
Connectivity Solutions [Member] | Sales Channel, Through Intermediary [Member] |  |
Net sales | 19,671 | 17,660
Power Solutions and Protection [Member] |  |
Net sales | 83,181 | 58,790
Power Solutions and Protection [Member] | Sales Channel, Directly to Consumer [Member] |  |
Net sales | 59,614 | 35,844
Power Solutions and Protection [Member] | Sales Channel, Through Intermediary [Member] |  |
Net sales | 23,567 | 22,946
Magnetic Solutions [Member] |  |
Net sales | 35,767 | 34,215
Magnetic Solutions [Member] | Sales Channel, Directly to Consumer [Member] |  |
Net sales | 27,411 | 25,738
Magnetic Solutions [Member] | Sales Channel, Through Intermediary [Member] |  |
Net sales | 8,356 | 8,477
North America [Member] |  |
Net sales | 116,167 | 85,759
North America [Member] | Connectivity Solutions [Member] |  |
Net sales | 43,013 | 32,532
North America [Member] | Power Solutions and Protection [Member] |  |
Net sales | 62,800 | 42,349
North America [Member] | Magnetic Solutions [Member] |  |
Net sales | 10,354 | 10,878
Europe [Member] |  |
Net sales | 24,766 | 21,070
Europe [Member] | Connectivity Solutions [Member] |  |
Net sales | 8,401 | 9,214
Europe [Member] | Power Solutions and Protection [Member] |  |
Net sales | 13,599 | 9,385
Europe [Member] | Magnetic Solutions [Member] |  |
Net sales | 2,766 | 2,471
Asia [Member] |  |
Net sales | 31,411 | 29,889
Asia [Member] | Connectivity Solutions [Member] |  |
Net sales | 1,982 | 1,967
Asia [Member] | Power Solutions and Protection [Member] |  |
Net sales | 6,782 | 7,056
Asia [Member] | Magnetic Solutions [Member] |  |
Net sales | $ 22,647 | $ 20,866

X
- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 924 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 11.L) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479941/924-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-5 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 30 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-30 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 42 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-42 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 22 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-22 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 32 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-32 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 40 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-40 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 22 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-22 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 32 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-32 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 41 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-41 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-4 + Details
Name: | us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_ContractWithCustomerSalesChannelAxis=us-gaap_SalesChannelDirectlyToConsumerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ContractWithCustomerSalesChannelAxis=us-gaap_SalesChannelThroughIntermediaryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=belfa_ConnectivitySolutionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=belfa_PowerSolutionsAndProtectionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=belfa_MagneticSolutionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=srt_NorthAmericaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=srt_EuropeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=srt_AsiaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |