Net Income (Loss) Per Share - Additional Information (Details)	3 Months Ended
Mar. 31, 2026 shares
Net income (loss) per share [Abstract]
Unvested Class A earnout shares are subject to forfeiture under the deferred settlement agreement	375,000

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