STATEMENTS OF CHANGES IN COMMON STOCK SUBJECT TO POSSIBLE REDEMPTION AND STOCKHOLDERS' EQUITY (DEFICIT) (Parenthetical)	Sep. 30, 2021 shares
STATEMENTS OF CHANGES IN COMMON STOCK SUBJECT TO POSSIBLE REDEMPTION AND STOCKHOLDERS' EQUITY (DEFICIT)
Maximum shares subject to forfeiture	750,000

Represents the maximum number of common stock shares subject to forfeiture.

No definition available.

Name:	fhltu_MaximumCommonStockSharesSubjectToForfeiture
Namespace Prefix:	fhltu_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant