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Cover Page - shares
 3 Months Ended
Mar. 31, 2020
May 18, 2020
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Mar. 31, 2020  
Document Transition Report false  
Entity File Number 001-33637  
Entity Registrant Name Cumberland Pharmaceuticals Inc.  
Entity Central Index Key 0001087294  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q1  
Amendment Flag false  
Entity Incorporation, State or Country Code TN  
Entity Tax Identification Number 62-1765329  
Entity Address, Address Line One 2525 West End Avenue  
Entity Address, Address Line Two Suite 950  
Entity Address, City or Town Nashville  
Entity Address, State or Province TN  
Entity Address, Postal Zip Code 37203  
City Area Code 615  
Local Phone Number 255-0068  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company false  
Entity Shell Company false  
Title of 12(b) Security Common stock, no par value  
Trading Symbol CPIX  
Security Exchange Name NASDAQ  
Entity Common Stock, Shares Outstanding   15,230,746