XML 46 R37.htm IDEA: XBRL DOCUMENT
v3.25.2

ORGANIZATION AND DESCRIPTION OF BUSINESS (Details) $ / shares in Units, $ in Thousands |  |  | 6 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Dec. 27, 2024 shares | Nov. 27, 2024 $ / shares shares | Mar. 31, 2025 subsidiary $ / shares shares | Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2024 USD ($) $ / shares | Sep. 30, 2023 USD ($) | Aug. 31, 2006 USD ($)
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net |  |  |  |  |  |  |  |
Par value |  |  | $ 0.00833335 |  |  | $ 0.00833335 |  |
Common Class A |  |  |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net |  |  |  |  |  |  |  |
Par value |  |  | $ 0.00833335 |  |  | $ 0.00833335 |  |
Target Company |  |  |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net |  |  |  |  |  |  |  |
Acquired equity interest, subsidiaries, percentage |  | 100.00% |  |  |  |  |  |
Target Company | Common Class A |  |  |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net |  |  |  |  |  |  |  |
Consideration shares | shares | 69,995,661 | 69,995,661 | 69,995,661 |  |  |  |  |
Par value |  | $ 0.00833335 |  |  |  |  |  |
Purchase price |  | $ 2 | $ 2 |  |  |  |  |
Qilian HK |  |  |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net |  |  |  |  |  |  |  |
Ownership interest (in percent) |  |  | 100.00% |  |  |  |  |
Qilian Chengdu |  |  |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net |  |  |  |  |  |  |  |
Ownership interest (in percent) |  |  | 100.00% |  |  |  |  |
Zhongqiao Youguan E Commerce Service Co. Ltd |  |  |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net |  |  |  |  |  |  |  |
Ownership interest (in percent) |  |  | 51.00% |  |  |  |  |
Gansu QLS |  |  |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net |  |  |  |  |  |  |  |
Initial capital | $ |  |  |  |  |  |  |  | $ 270
Registered capital | $ |  |  |  |  |  | $ 12,000 | $ 12,000 |
Number of subsidiaries | subsidiary |  |  | 7 |  |  |  |  |
Amount of pledged equity interest (in percent) |  |  |  | 99.214% | 99.214% |  |  |
Gansu QLS | Qilian Chengdu |  |  |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net |  |  |  |  |  |  |  |
Ownership interest (in percent) |  |  |  | 99.214% | 99.214% |  |  |
Gansu QLS | Moshangfa (Gansu) Fertilizer Industry Co., Ltd (formerly Jiuquan Qiming Biotechnology Co., Ltd, "Moshangfa") |  |  |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net |  |  |  |  |  |  |  |
Ownership interest (in percent) |  |  | 100.00% |  |  | 100.00% |  |
Gansu QLS | Chengdu Qilianshan Biotechnology Co., Ltd ("Chengdu QLS") |  |  |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net |  |  |  |  |  |  |  |
Ownership interest (in percent) |  |  | 79.71% |  |  | 79.51% |  |
Gansu QLS | Jiuquan Ahan Biotechnology Co., Ltd. ("Ahan") |  |  |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net |  |  |  |  |  |  |  |
Ownership interest (in percent) |  |  | 100.00% |  |  | 100.00% |  |
Gansu QLS | Tibet Cangmen Trading Co., Ltd ("Cangmen") |  |  |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net |  |  |  |  |  |  |  |
Ownership interest (in percent) |  |  | 100.00% |  |  | 100.00% |  |
Gansu QLS | Rugao Tianlu Animal Products Co., Ltd ("Rugao") |  |  |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net |  |  |  |  |  |  |  |
Ownership interest (in percent) |  |  | 79.71% |  |  | 79.51% |  |
Gansu QLS | Chongqing Shengfu Biological Technology Co., Ltd ("Chongqing") |  |  |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net |  |  |  |  |  |  |  |
Ownership interest (in percent) |  |  | 79.71% |  |  | 79.51% |  |

X
- Definition Represents the percentage of pledged equity interest. + References No definition available. + Details
Name: | bgm_AmountOfPledgedEquityInterest
Namespace Prefix: | bgm_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of initial capital. + References No definition available. + Details
Name: | bgm_InitialCapital
Namespace Prefix: | bgm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the number of subsidiaries. + References No definition available. + Details
Name: | bgm_NumberOfSubsidiaries
Namespace Prefix: | bgm_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition The amount of registered capital. + References No definition available. + Details
Name: | bgm_RegisteredCapital
Namespace Prefix: | bgm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Number of shares of equity interests issued or issuable to acquire entity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 805 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b)(4) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479581/805-30-50-1 + Details
Name: | us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of voting equity interests acquired at the acquisition date in the business combination. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479328/805-10-50-2 + Details
Name: | us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Price of a single share of a number of saleable stocks paid or offered to be paid in a business combination. + References No definition available. + Details
Name: | us-gaap_BusinessAcquisitionSharePrice
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Face amount or stated value per share of common stock. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_CommonStockParOrStatedValuePerShare
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- 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. + Details
Name: | us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestEffectsOfChangesNetLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The parent entity's interest in net assets of the subsidiary, expressed as a percentage. + References No definition available. + Details
Name: | us-gaap_MinorityInterestOwnershipPercentageByParent
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | srt_OwnershipAxis=bgm_QilianInternationalHongKongHoldingsLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_OwnershipAxis=bgm_ChengduQilianTradingCo.LtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_OwnershipAxis=bgm_ZhongqiaoYouguanECommerceServiceCo.LtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=bgm_GansuQilianshanPharmaceuticalCo.LtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_OwnershipAxis=bgm_JiuquanQimingBiotechnologyCo.LtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_OwnershipAxis=bgm_ChengduQilianshanBiotechnologyCo.LtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_OwnershipAxis=bgm_JiuquanAhanBiotechnologyCo.Ltd.Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_OwnershipAxis=bgm_TibetCangmenTradingCo.LtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_OwnershipAxis=bgm_RugaoTianluAnimalProductsCo.LtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_OwnershipAxis=bgm_ChongqingShengfuBiologicalTechnologyCoLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |