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Note 6 - Net Loss Per Share (Details Textual) - $ / shares | Mar. 31, 2025 | Oct. 06, 2023
--- | --- | ---
Series F Preferred Stock [Member] |  |
Preferred Stock, Convertible, Floor Price (in dollars per share) | $ 11.17 | $ 11.17

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- Definition Per share floor price of preferred stock. + References No definition available. + Details
Name: | oblg_PreferredStockConvertibleFloorPrice
Namespace Prefix: | oblg_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

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