XML 55 R44.htm IDEA: XBRL DOCUMENT
v3.24.3

Note 4 - Revenue - Disaggregation of Revenue by Product Group and Sales Channel (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Net sales | $ 123,638 | $ 158,682 | $ 384,933 | $ 499,803
Sales Channel, Directly to Consumer [Member] |  |  |  |
Net sales | 80,443 | 108,897 | 248,917 | 345,906
Sales Channel, Through Intermediary [Member] |  |  |  |
Net sales | 43,195 | 49,785 | 136,016 | 153,897
Power Solutions and Protection [Member] |  |  |  |
Net sales | 48,680 | 74,862 | 167,478 | 245,134
Power Solutions and Protection [Member] | Sales Channel, Directly to Consumer [Member] |  |  |  |
Net sales | 32,960 | 52,507 | 109,357 | 174,143
Power Solutions and Protection [Member] | Sales Channel, Through Intermediary [Member] |  |  |  |
Net sales | 15,720 | 22,355 | 58,121 | 70,991
Connectivity Solutions [Member] |  |  |  |
Net sales | 55,715 | 51,771 | 167,822 | 160,010
Connectivity Solutions [Member] | Sales Channel, Directly to Consumer [Member] |  |  |  |
Net sales | 34,085 | 31,369 | 104,583 | 101,063
Connectivity Solutions [Member] | Sales Channel, Through Intermediary [Member] |  |  |  |
Net sales | 21,630 | 20,402 | 63,239 | 58,947
Magnetic Solutions [Member] |  |  |  |
Net sales | 19,243 | 32,049 | 49,633 | 94,659
Magnetic Solutions [Member] | Sales Channel, Directly to Consumer [Member] |  |  |  |
Net sales | 13,398 | 25,021 | 34,977 | 70,700
Magnetic Solutions [Member] | Sales Channel, Through Intermediary [Member] |  |  |  |
Net sales | 5,845 | 7,028 | 14,656 | 23,959
North America [Member] |  |  |  |
Net sales | 80,555 | 111,083 | 262,038 | 346,949
North America [Member] | Power Solutions and Protection [Member] |  |  |  |
Net sales | 30,806 | 55,262 | 109,552 | 182,183
North America [Member] | Connectivity Solutions [Member] |  |  |  |
Net sales | 42,414 | 42,841 | 131,678 | 130,086
North America [Member] | Magnetic Solutions [Member] |  |  |  |
Net sales | 7,335 | 12,980 | 20,808 | 34,680
Europe [Member] |  |  |  |
Net sales | 25,909 | 22,804 | 79,864 | 75,704
Europe [Member] | Power Solutions and Protection [Member] |  |  |  |
Net sales | 13,172 | 13,759 | 44,115 | 43,266
Europe [Member] | Connectivity Solutions [Member] |  |  |  |
Net sales | 11,422 | 7,500 | 32,100 | 25,462
Europe [Member] | Magnetic Solutions [Member] |  |  |  |
Net sales | 1,315 | 1,545 | 3,649 | 6,976
Asia [Member] |  |  |  |
Net sales | 17,174 | 24,795 | 43,031 | 77,150
Asia [Member] | Power Solutions and Protection [Member] |  |  |  |
Net sales | 4,702 | 5,841 | 13,811 | 19,685
Asia [Member] | Connectivity Solutions [Member] |  |  |  |
Net sales | 1,879 | 1,430 | 4,044 | 4,462
Asia [Member] | Magnetic Solutions [Member] |  |  |  |
Net sales | $ 10,593 | $ 17,524 | $ 25,176 | $ 53,003

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 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 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 270 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482964/270-10-50-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 32 -Subparagraph (ee) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-32 Reference 4: http://fasb.org/us-gaap/role/ref/otherTransitionRef -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 5: http://fasb.org/us-gaap/role/ref/otherTransitionRef -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 6: 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 7: 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 8: 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 9: 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 10: 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 11: 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 12: 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 13: 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_PowerSolutionsAndProtectionMember
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_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: |