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REVENUE AND CONTRACT LIABILITY - Sales Returns Allowance (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2025	Dec. 31, 2024
Revenue from Contract with Customer [Abstract]
Beginning balance	$ 9,526	$ 8,651
Additions to the allowance	20,955	105,353
Deductions from the allowance	(22,760)	(104,478)
Ending balance	$ 7,721	$ 9,526

X

- Definition

Deductions From Sales Returns, Current

+ References

No definition available.

+ Details

Name:	byon_DeductionsFromSalesReturnsCurrent
Namespace Prefix:	byon_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

A valuation allowance for estimated sales returns.

+ References

No definition available.

+ Details

Name:	byon_SalesReturnReserveForSalesReturnsCurrent
Namespace Prefix:	byon_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Sales Returns, Additions To Reserve For Sales Returns

+ References

No definition available.

+ Details

Name:	byon_SalesReturnsAdditionsToReserveForSalesReturns
Namespace Prefix:	byon_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_RevenueFromContractWithCustomerAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration