STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Parenthetical)	Nov. 26, 2019 shares
Initial Public Offering [Member]
Stockholders' Equity
Units issued (in shares)	30,000,000
Private Placement Warrants [Member]
Stockholders' Equity
Warrants issued (in shares)	8,000,000

Number of new units issued during the period. Each unit consists of one share of Class A common stock and one redeemable warrant.

No definition available.

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Namespace Prefix:	chpmu_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration