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Condensed Consolidated Statements of Cash Flows (Unaudited) (Parenthetical) $ in Thousands | 9 Months Ended
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Sep. 30, 2021 USD ($)
Statement of Cash Flows [Abstract] |
Underwriting commissions and discounts | $ 6,488

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- Definition Underwriting Commissions And Discounts + References No definition available. + Details
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Namespace Prefix: | rlyb_
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Balance Type: | credit
Period Type: | duration

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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