CONDENSED STATEMENTS OF CASH FLOWS (Parenthetical) - USD ($)	Jun. 30, 2024	Dec. 31, 2023	Jun. 30, 2023	Dec. 31, 2022
CONDENSED STATEMENTS OF CASH FLOWS [Abstract]
Cash held in Trust account	$ 38,785,075	$ 108,901,049	$ 358,074,839	$ 0

The amount of cash held by a third-party trustee pursuant to the terms of an agreement which assets are available to be used by beneficiaries to that agreement only within the specific terms thereof and which agreement is expected to terminate more than one year from the balance sheet date (or operating cycle, if longer) at which time the assets held-in-trust will be released or forfeited.

No definition available.

Name:	nfys_CashHeldInTrustNoncurrent
Namespace Prefix:	nfys_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant