Annual report pursuant to Section 13 and 15(d)

Document And Entity Information

Document And Entity Information - USD ($)
12 Months Ended
Mar. 31, 2021
Jun. 16, 2021
Dec. 31, 2020
Document Information Line Items      
Entity Registrant Name Crown ElectroKinetics Corp.    
Document Type 10-K    
Current Fiscal Year End Date --03-31    
Entity Common Stock, Shares Outstanding   14,882,741  
Entity Public Float     $ 34,200,000
Amendment Flag false    
Entity Central Index Key 0001761696    
Entity Current Reporting Status No    
Entity Voluntary Filers No    
Entity Filer Category Non-accelerated Filer    
Entity Well-known Seasoned Issuer No    
Document Period End Date Mar. 31, 2021    
Document Fiscal Year Focus 2021    
Document Fiscal Period Focus FY    
Entity Small Business true    
Entity Emerging Growth Company true    
Entity Shell Company false    
Entity Ex Transition Period true    
Entity File Number 333-249833    
Entity Incorporation, State or Country Code DE    
Entity Interactive Data Current Yes