Cover - USD ($)
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Mar. 31, 2023
Jun. 30, 2022
Cover [Abstract]        
Document Type 10-K      
Amendment Flag false      
Document Annual Report true      
Document Transition Report false      
Document Period End Date Dec. 31, 2022      
Document Fiscal Period Focus FY      
Document Fiscal Year Focus 2022      
Current Fiscal Year End Date --12-31      
Entity File Number 001-35824      
Entity Registrant Name Professional Diversity Network, Inc.      
Entity Central Index Key 0001546296      
Entity Tax Identification Number 80-0900177      
Entity Incorporation, State or Country Code DE      
Entity Address, Address Line One 55 E. Monroe Street      
Entity Address, Address Line Two Suite 2120      
Entity Address, City or Town Chicago      
Entity Address, State or Province IL      
Entity Address, Postal Zip Code 60603      
City Area Code (312)      
Local Phone Number 614-0950      
Title of 12(b) Security Common Stock, $0.01 par value per share      
Security Exchange Name NASDAQ      
Entity Well-known Seasoned Issuer No      
Entity Voluntary Filers No      
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      
Entity Public Float       $ 7,310,765
Entity Common Stock, Shares Outstanding     10,269,530  
Documents Incorporated by Reference [Text Block] Portions of the Registrant’s Proxy Statement for the Registrant’s 2023 Annual Meeting of Stockholders are incorporated by reference in Part III of this Form 10-K      
ICFR Auditor Attestation Flag false      
Auditor Name Sassetti, LLC Ciro E. Adams, CPA, LLC    
Auditor Firm ID 29 5938    
Auditor Location Oak Brook, Illinois Wilmington, DE 19806-1004