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EMPLOYEE RETIREMENT PLAN (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Retirement Benefits [Abstract] |  |  |
Minimum period of service to qualify to participate in 401(k) defined contribution plan | 3 months |  |
Eligible age to participate in 401(k) defined contribution plan | 21 years |  |
Employer match of first 6% of participant's contributions (as a percent) | 100.00% |  |
Percentage of participant's' gross pay for which the employer contributes a matching contribution | 6.00% |  |
Matching contributions made by the company | $ 4,300,000 | $ 5,000,000.0 | $ 5,700,000
Discretionary contributions | $ 0 | $ 0 | $ 0

X
- Definition The employer contribution as a percentage of the amount contributed by employee up to specified employee contribution that the employer may contribute to a defined contribution plan. + References No definition available. + Details
Name: | byon_DefinedContributionPlanEmployerMatchUpToSpecifiedEmployeeContribution
Namespace Prefix: | byon_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition The minimum period that the individual is required to perform services in order to be fully vested under the 401(k) defined contribution plan. + References No definition available. + Details
Name: | byon_DefinedContributionPlanMinimumRequisiteServicePeriod
Namespace Prefix: | byon_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition This element represents the minimum age limit for participating in 401(k) defined contribution plan. + References No definition available. + Details
Name: | byon_DefinedContributionPlanParticipantMinimumAge
Namespace Prefix: | byon_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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

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- Definition Amount of cost for defined contribution plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 70 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480794/715-70-50-1 + Details
Name: | us-gaap_DefinedContributionPlanCostRecognized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of discretionary contributions made by an employer to a defined contribution plan. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration