XML 13 R1.htm IDEA: XBRL DOCUMENT v3.22.1
Document and Entity Information - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Mar. 25, 2022
Jun. 30, 2021
Cover [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Dec. 31, 2021    
Document Fiscal Year Focus 2021    
Document Fiscal Period Focus FY    
Trading Symbol CALA    
Entity Registrant Name CALITHERA BIOSCIENCES, INC.    
Entity Central Index Key 0001496671    
Current Fiscal Year End Date --12-31    
Entity Current Reporting Status Yes    
Entity Shell Company false    
Entity File Number 001-36644    
Entity Tax Identification Number 27-2366329    
Entity Address, Address Line One 343 Oyster Point Blvd.    
Entity Address, Address Line Two Suite 200    
Entity Address, City or Town South San Francisco    
Entity Address, State or Province CA    
Entity Address, Postal Zip Code 94080    
City Area Code 650    
Local Phone Number 870-1000    
Entity Incorporation, State or Country Code DE    
Entity Filer Category Non-accelerated Filer    
Title of 12(b) Security Common Stock, Par Value $0.0001 Per Share    
Security Exchange Name NASDAQ    
Entity Emerging Growth Company false    
Entity Small Business true    
Document Annual Report true    
Document Transition Report false    
ICFR Auditor Attestation Flag false    
Entity Common Stock, Shares Outstanding   78,717,655  
Entity Voluntary Filers No    
Entity Well-known Seasoned Issuer No    
Entity Interactive Data Current Yes    
Entity Public Float     $ 143.3
Documents Incorporated by Reference

The Registrant’s Definitive Proxy Statement relating to the 2022 Annual Meeting of Stockholders will be filed with the Securities and Exchange Commission within 120 days after the end of the fiscal year covered by this Annual Report on Form 10-K and portions of such are incorporated by reference into Part III of this Annual Report on Form 10-K.

   
Auditor Name Ernst & Young LLP    
Auditor Location Redwood City, California    
Auditor Firm ID 42