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v3.25.0.1

Business Segment Information - Additional Information (Detail) - Operating Segments [Member] - USD ($) | Dec. 31, 2024 | Mar. 31, 2024
--- | --- | ---
Segment Reporting Information [Line Items] |  |
Identifiable assets | $ 448,000 | $ 903,000
Mosaic [Member] |  |
Segment Reporting Information [Line Items] |  |
Identifiable assets | $ 0 |

X
- Definition Segment assets. + References No definition available. + Details
Name: | onvo_SegmentAssets
Namespace Prefix: | onvo_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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_SegmentReportingInformationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_ConsolidationItemsAxis=us-gaap_OperatingSegmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=onvo_MosaicSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |