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Cover - USD ($)
 12 Months Ended
Dec. 31, 2021
Apr. 15, 2022
Jun. 30, 2021
Cover [Abstract]      
Entity Registrant Name COSMOS HOLDINGS INC.    
Entity Central Index Key 0001474167    
Document Type 10-K/A    
Amendment Flag true    
Entity Voluntary Filers No    
Current Fiscal Year End Date --12-31    
Entity Well Known Seasoned Issuer No    
Entity Small Business true    
Entity Shell Company false    
Entity Emerging Growth Company false    
Entity Current Reporting Status Yes    
Document Period End Date Dec. 31, 2021    
Entity Filer Category Non-accelerated Filer    
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2021    
Entity Common Stock Shares Outstanding   17,544,524  
Entity Public Float     $ 42,371,783
Document Annual Report true    
Entity File Number 000-54436    
Entity Incorporation State Country Code NV    
Entity Tax Identification Number 27-0611758    
Entity Interactive Data Current Yes    
Entity Address Address Line 1 141 West Jackson Blvd    
Entity Address Address Line 2 Suite 4236    
Entity Address City Or Town Chicago    
Entity Address State Or Province IL    
Entity Address Postal Zip Code 60604    
City Area Code 312    
Local Phone Number 536-3102    
Security 12b Title Common Stock, par value $0.001    
Document Transition Report false    
Auditor Firm Id 32    
Auditor Name Armanino LLP    
Auditor Location San Francisco, California    
Amendment Description This Amendment No. 1 to Form 10-K/A of Cosmos Holdings Inc., for the year ended December 31, 2021, is being filed in response to the Staff’s Comment Letter dated November 29, 2022.  This Amendment solely includes Item 8 – Financial Statements and Supplementary Data, which has not been revised; Item 9A – Controls and Procedures, which has been revised to state a conclusive statement that controls were not effective as of December 31, 2021; and Part IV, which has been updated.