Basis of Presentation and Summary of Significant Accounting Policies - Additional Information (Detail) $ / shares in Units, $ in Thousands				6 Months Ended
	May 25, 2022 USD ($) shares	Feb. 08, 2022 USD ($) shares	Jan. 31, 2022 USD ($) $ / shares shares	Jun. 30, 2022 USD ($) $ / shares shares	Jan. 01, 2022 USD ($)
Accounting Policies [Line Items]
Cash received	$ 9,900
Cash acquired from business acquisition and PIPE financing				$ 43,800
Payment for settlement of debt outstanding				106,000
Proceeds from share subscription facility provided by business acquired				$ 125,000
Exchange of Common stock for settlement | shares	25,100,000
Lessee, Operating Lease, Term of Contract				12 months
Operating Lease, Right-of-Use Asset				$ 100	$ 500
Operating Lease, Liability				$ 131	$ 500
Merger Agreement [Member] | Quanergy Common Stock [Member]
Accounting Policies [Line Items]
Common stock convertible, conversion ratio		3.8799
Merger Agreement [Member] | Quanergy Common Stock [Member] | Minimum [Member]
Accounting Policies [Line Items]
Class of warrant or right conversion ratio		1.0
Merger Agreement [Member] | Quanergy Common Stock [Member] | Maximum [Member]
Accounting Policies [Line Items]
Class of warrant or right conversion ratio		1.0
Common Class A [Member] | Merger Agreement [Member] | Quanergy Systems, Inc [Member]
Accounting Policies [Line Items]
Number Shareholders of the Company | shares		600,000	26,867,796
Percentage of the shares with redemption rights		0.022	0.973
Right exercised to redeem shares for cash at redemption price per share | $ / shares			$ 10.07
Number of Redemption Right Shares Reversed		$ 6,000
Right exercised to redeem shares for cash at redemption			$ 270,500
Series B Preferred Stock [Member] | Merger Agreement [Member]
Accounting Policies [Line Items]
Preferred Stock, Convertible, Conversion Ratio		11.5423
Series C Preferred Stock [Member] | Merger Agreement [Member]
Accounting Policies [Line Items]
Preferred Stock, Convertible, Conversion Ratio		14.3118
PIPE Shares [Member] | Subscription Agreement [Member]
Accounting Policies [Line Items]
Number of shares subscribed to purchase | shares				3,695,000
Per share price of subscribed shares | $ / shares				$ 10.00
Value of subscribed shares				$ 37,000