Annual report pursuant to Section 13 and 15(d)


Cover - USD ($)
12 Months Ended
Dec. 31, 2021
Mar. 18, 2022
Jun. 30, 2021
Cover [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Annual Report true    
Document Transition Report false    
Document Period End Date Dec. 31, 2021    
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2021    
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     $ 11,751,986
Entity Common Stock, Shares Outstanding   16,346,972  
Documents Incorporated by Reference [Text Block] Portions of the Registrant’s Proxy Statement for the Registrant’s 2022 Annual Meeting of Stockholders are incorporated by reference in Part III of this Form 10-K    
ICFR Auditor Attestation Flag false    
Auditor Name Ciro E. Adams, CPA, LLC    
Auditor Firm ID 5938    
Auditor Location Wilmington, DE