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Document and Entity Information
Nov. 18, 2022
Document And Entity Information [Line Items]  
Security Exchange Name NASDAQ
Amendment Flag false
Entity Central Index Key 0001846253
Document Type 8-K
Document Period End Date Nov. 18, 2022
Entity Registrant Name OmniAb, Inc.
Entity Incorporation State Country Code DE
Entity File Number 001-40720
Entity Tax Identification Number 98-1584818
Entity Address, Address Line One 5980 Horton Street
Entity Address, Address Line Two Suite 600
Entity Address, City or Town Emeryville
Entity Address, State or Province CA
Entity Address, Postal Zip Code 94608
City Area Code (510)
Local Phone Number 250-7800
Written Communications false
Soliciting Material false
Pre Commencement Tender Offer false
Pre Commencement Issuer Tender Offer false
Entity Emerging Growth Company true
Entity Ex Transition Period false
Common Stock 0.0001 Par Value Per Share [Member]  
Document And Entity Information [Line Items]  
Security Exchange Name NASDAQ
Security 12b Title Common stock, $0.0001 par value per share
Trading Symbol OABI
Warrants To Purchase Common Stock [Member]  
Document And Entity Information [Line Items]  
Security Exchange Name NASDAQ
Security 12b Title Warrants to purchase common stock
Trading Symbol OABIW