Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2021	Mar. 31, 2022	Jun. 30, 2021
Entity Listings [Line Items]
Document Type	10-K
Amendment Flag	false
Document Annual Report	true
Document Period End Date	Dec. 31, 2021
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Document Transition Report	false
Entity Registrant Name	KERNEL GROUP HOLDINGS, INC.
Entity Central Index Key	0001832950
Entity Incorporation, State or Country Code	E9
Entity File Number	001-39983
Entity Tax Identification Number	98-1567976
Entity Address, Address Line One	2 Rousseau Street
Entity Address, City or Town	San Francisco
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	94112
City Area Code	415
Local Phone Number	404-6356
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Shell Company	true
Entity Public Float			$ 295,912,250
ICFR Auditor Attestation Flag	false
Auditor Name	WithumSmith+Brown, PC
Auditor Location	New York, New York
Auditor Firm ID	100
Units [Member]
Entity Listings [Line Items]
Title of 12(b) Security	Units, each consisting of one Class A ordinary share, $0.0001 par value, and one-half of one redeemable warrant
Trading Symbol	KRNLU
Security Exchange Name	NASDAQ
Class A Ordinary Shares [Member]
Entity Listings [Line Items]
Title of 12(b) Security	Class A ordinary shares included as part of the units
Trading Symbol	KRNL
Security Exchange Name	NASDAQ
Entity Common Stock, Shares Outstanding		30,475,000
Class B Ordinary Shares [Member]
Entity Listings [Line Items]
Entity Common Stock, Shares Outstanding		7,618,750
Redeemable Warrants [Member]
Entity Listings [Line Items]
Title of 12(b) Security	Redeemable warrants included as part of the units
Trading Symbol	KRNLW
Security Exchange Name	NASDAQ