Net Income (Loss) Per Share - Additional Information (Details) shares in Thousands	6 Months Ended
Jun. 30, 2026 shares
Net income (loss) per share [Abstract]
Unvested Class A earnout shares are subject to forfeiture under the deferred settlement agreement	375

Unvested Class A earnout shares are subject to forfeiture under the deferred settlement agreement.

No definition available.

Name:	fbyd_UnvestedClassAEarnoutSharesSubjectToForfeitureUnderTheDeferredSettlementAgreement
Namespace Prefix:	fbyd_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration