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Document And Entity Information - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Mar. 08, 2022
Jun. 30, 2021
Document Information [Line Items]        
Entity Registrant Name CLENE INC.      
Document Type 10-K      
Document Annual Report true      
Current Fiscal Year End Date --12-31      
Entity Common Stock, Shares Outstanding     63,138,351  
Entity Public Float       $ 359.6
Amendment Flag false      
Entity Central Index Key 0001822791      
Entity Current Reporting Status Yes      
Entity Voluntary Filers No      
Entity Filer Category Non-accelerated Filer      
Entity Well-known Seasoned Issuer No      
Document Period End Date Dec. 31, 2021      
Document Fiscal Year Focus 2021      
Document Transition Report false      
Document Fiscal Period Focus FY      
Entity Small Business true      
Entity Emerging Growth Company true      
Entity Shell Company false      
Entity Ex Transition Period false      
Entity File Number 01-39834      
Entity Incorporation, State or Country Code DE      
Entity Tax Identification Number 85-2828339      
Entity Address, Address Line One 6550 South Millrock Drive      
Entity Address, Address Line Two Suite G50      
Entity Address, City or Town Salt Lake City      
Entity Address, State or Province UT      
Entity Address, Postal Zip Code 84121      
City Area Code 801      
Local Phone Number 676 9695      
Title of 12(b) Security Common Stock, $0.0001 par value      
Trading Symbol CLNN      
Security Exchange Name NASDAQ      
Entity Interactive Data Current Yes      
ICFR Auditor Attestation Flag false      
Documents Incorporated By Reference

DOCUMENTS INCORPORATED BY REFERENCE

 

Portions of the registrant’s definitive proxy statement relating to its 2022 Annual Meeting of Stockholders are incorporated by reference into Part III of this Annual Report on Form 10-K where indicated. The definitive proxy statement will be filed with the U.S. Securities and Exchange Commission within 120 days after the end of fiscal year to which this report relates.

      
Auditor Name Deloitte & Touche LLP PricewaterhouseCoopers LLP    
Auditor Firm ID 34 238    
Auditor Location Salt Lake City, Utah Salt Lake City, Utah