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STOCKHOLDERS' EQUITY - JonesTrading Sales Agreement (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Equity [Abstract] |  |  |
Proceeds from issuance of common stock | $ 0 | $ 0 | $ 0

X
- Definition Proceeds from Issuance of Common Stock included in Accounts Receivable + References No definition available. + Details
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Namespace Prefix: | byon_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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