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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: