Quarterly report pursuant to Section 13 or 15(d)

Document and Entity Information

Document and Entity Information - shares
9 Months Ended
Dec. 31, 2020
Feb. 11, 2021
Document and Entity Information [Abstract]    
Entity Registrant Name Crown ElectroKinetics Corp.  
Entity Central Index Key 0001761696  
Amendment Flag false  
Current Fiscal Year End Date --03-31  
Document Type 10-Q  
Document Period End Date Dec. 31, 2020  
Document Fiscal Period Focus Q3  
Document Fiscal Year Focus 2021  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Entity Current Reporting Status Yes  
Entity Shell Company false  
Entity Interactive Data Current Yes  
Entity Incorporation State Country Code DE  
Entity File Number 333-232426  
Entity Common Stock, Shares Outstanding   13,253,493