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v3.26.1

BALANCE SHEET COMPONENTS - Additional Information (Details) $ in Millions | Jun. 30, 2026 USD ($)
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Balance Sheet Related Disclosures [Abstract] |
Other receivables, gross, current | $ 1.0
Future contingent milestone and royalty assets, current | 2.2
Other assets, miscellaneous, current | $ 0.3

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- Definition Future Contingent Milestone And Royalty Assets, Current + References No definition available. + Details
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Namespace Prefix: | rlyb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of other miscellaneous assets expected to be realized or consumed within one year or operating cycle, if longer. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Amount, before allowance, of receivables classified as other, due within one year or the operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480657/210-10-S50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(3)(a)(4)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
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Balance Type: | debit
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