Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2021	Mar. 07, 2022
Entity Listings [Line Items]
Document Type	10-Q/A
Amendment Flag	true
Amendment Description	The Original Form 10-Q included a section within Note 2, Revision to Previously Reported Financial Statements, that described a revision to the Company’s classification of its Class A ordinary shares subject to redemption issued as part of the units sold in the Company’s initial public offering (“Initial Public Offering”) on February 5, 2021. As described in Note 2, upon its Initial Public Offering, the Company classified a portion of the Class A ordinary shares as permanent equity to maintain net tangible assets greater than $5,000,000 on the basis that the Company will consummate its initial business combination only if the Company has net tangible assets of at least $5,000,001. Previously, the Company did not consider redeemable shares classified as temporary equity as part of net tangible assets. The Company revised this interpretation to include temporary equity in net tangible assets. As a result, management corrected the error by reclassifying all Class A ordinary shares subject to redemption as temporary equity. This resulted in an adjustment to the initial carrying value of the Class A ordinary shares subject to possible redemption with the offset recorded to additional paid-in capital (to the extent available), accumulated deficit and Class A ordinary shares. In connection with the change in presentation for the Class A ordinary shares subject to possible redemption, the Company revised its earnings per share calculation to allocate income and losses shared pro rata between the two classes of shares. This presentation contemplates a Business Combination as the most likely outcome, in which case, both classes of shares participate pro rata in the income and losses of the Company. Previously, the Company determined the changes were not qualitatively material to the Company’s previously issued financial statements and did not restate its financial statements. Instead, the Company revised its previously reported financial statements in Note 2 to its Original Form 10-Q. Although the qualitative factors that management assessed tended to support a conclusion that the misstatements were not material, these factors were not strong enough to overcome the significant quantitative errors in the financial statements. The qualitative and quantitative factors support a conclusion that the misstatements are material on a quantitative basis. Management concluded that the misstatement was of such magnitude that it is probable that the judgment of a reasonable person relying upon the financial statements would have been influenced by the inclusion or correction of the foregoing items. As such, upon further consideration of the change, the Company determined the change in classification of the Class A ordinary shares and change to its presentation of earnings per share is material quantitatively and it should restate its previously issued financial statements. Therefore, on February 22, 2022, the Company’s management and the audit committee of the Company’s board of directors (the “Audit Committee”), concluded that the Company’s previously issued (i) audited balance sheet as of February 5, 2021 (the “Audited Balance Sheet”), as previously restated in the Company’s Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2021, filed with the SEC on June 8, 2021 (the “Q1 Form 10-Q”), and as further revised in the Company’s Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2021, filed with the SEC on November 15, 2021 (the “Q3 Form 10-Q”), (ii) unaudited condensed financial statements included in the Q1 Form 10-Q, as revised in the Q3 Form 10-Q, (iii) unaudited condensed financial statements included in the Company’s Quarterly Report on Form 10-Q for the quarterly period ended June 30, 2021, filed with the SEC on August 16, 2021, as revised in the Q3 Form 10-Q, and (iv) a section within Note 2 to unaudited condensed financial statements and Item 4 of Part 1 included in the Q3 Form 10-Q, ((ii) through (iv) collectively, the “Affected Periods”), should be restated to report all Class A ordinary shares, par value $0.0001 per share, of the Company (the “Public Shares”) as temporary equity and calculate earnings per share pro rata between the Public Shares and the Company’s Class B ordinary shares, par value $0.0001 per share, and should no longer be relied upon. The reclassification has resulted from a determination by the Company’s management that the Public Shares issued in connection with its initial public offering can be redeemed or become redeemable subject to the occurrence of future events considered to be outside of the Company’s control. Therefore, the Public Shares subject to possible redemption should be valued at $10.00 per share and should not take into account the fact that a redemption of Public Shares cannot result in net tangible assets being less than $5,000,001. As such, the Company will restate its financial statements for the Affected Periods in this Quarterly Report on Form 10-Q/A, for the unaudited condensed financial statements for the periods ended March 31, 2021, June 30, 2021, and September 30, 2021.
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2021
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q3
Document Transition Report	false
Entity File Number	001-39983
Entity Registrant Name	KERNEL GROUP HOLDINGS, INC.
Entity Central Index Key	0001832950
Entity Incorporation, State or Country Code	E9
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 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
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