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Note 2 - Summary of Significant Accounting Policies - Schedule of Useful Lives (Details) | Sep. 30, 2025
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Minimum [Member] |
Useful life (Year) | 5 years
Minimum [Member] | Fiber Plant [Member] |
Useful life (Year) | 15 years
Minimum [Member] | Equipment [Member] |
Useful life (Year) | 3 years
Minimum [Member] | Leasehold Improvements [Member] |
Useful life (Year) | 6 years
Minimum [Member] | Furniture and Fixtures [Member] |
Useful life (Year) | 5 years
Minimum [Member] | Tower Sites and Construction Equipment [Member] |
Useful life (Year) | 5 years
Maximum [Member] |
Useful life (Year) | 10 years
Maximum [Member] | Fiber Plant [Member] |
Useful life (Year) | 30 years
Maximum [Member] | Equipment [Member] |
Useful life (Year) | 7 years
Maximum [Member] | Leasehold Improvements [Member] |
Useful life (Year) | 15 years
Maximum [Member] | Furniture and Fixtures [Member] |
Useful life (Year) | 7 years
Maximum [Member] | Tower Sites and Construction Equipment [Member] |
Useful life (Year) | 10 years

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- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

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- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=omcc_FiberPlantMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_EquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_LeaseholdImprovementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_FurnitureAndFixturesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=omcc_TowerSitesAndConstructionEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |