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Note 7 - Net Loss Per Share (Details Textual) - Series F Preferred Stock [Member] - $ / shares	Sep. 30, 2024	Oct. 06, 2023	Sep. 30, 2023	Mar. 30, 2023
Preferred Stock, Convertible, Floor Price (in dollars per share)	$ 11.168	$ 11.168
Preferred Stock, Convertible, Conversion Price (in dollars per share)	$ 11.17		$ 68.4	$ 68.4

X

- Definition

Per share floor price of preferred stock.

+ References

No definition available.

+ Details

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Namespace Prefix:	oblg_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Per share conversion price of preferred stock.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-13

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: