Cover - USD ($)	12 Months Ended
	Dec. 31, 2021	Mar. 29, 2022	Jun. 30, 2021
Document Type	10-K
Amendment Flag	false
Document Annual Report	true
Document Transition Report	false
Document Period End Date	Dec. 31, 2021
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2021
Current Fiscal Year End Date	--12-31
Entity File Number	001-40872
Entity Registrant Name	AVALON ACQUISITION INC.
Entity Central Index Key	0001836478
Entity Tax Identification Number	85-3451075
Entity Incorporation, State or Country Code	DE
Entity Address, Address Line One	2 Embarcadero Center
Entity Address, Address Line Two	8th Floor
Entity Address, City or Town	San Francisco
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	94111
City Area Code	(415)
Local Phone Number	423-0010
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
Elected Not To Use the Extended Transition Period	false
Entity Shell Company	true
Entity Public Float			$ 0
Auditor Name	WithumSmith+Brown, PC
Auditor Location	New York
Auditor Firm ID	100
Units, each consisting of one share of Class A common stock, par value $0.0001 per share and three-fourths one redeemable warrant
Title of 12(b) Security	Units, each consisting of one share of Class A common stock, par value $0.0001 per share and three-fourths one redeemable warrant
Trading Symbol	AVACU
Security Exchange Name	NASDAQ
Class A common stock, par value $0.0001 per share
Title of 12(b) Security	Class A common stock, par value $0.0001 per share
Trading Symbol	AVAC
Security Exchange Name	NASDAQ
Redeemable warrants, each whole warrant exercisable for one share of Class A common stock at an exercise price of $11.50 per whole share
Title of 12(b) Security	Redeemable warrants, each whole warrant exercisable for one share of Class A common stock at an exercise price of $11.50 per whole share
Trading Symbol	AVACW
Security Exchange Name	NASDAQ
Class A Common Stock [Member]
Entity Common Stock, Shares Outstanding		20,855,250
Class B Common Stock [Member]
Entity Common Stock, Shares Outstanding		5,175,000