| Cover | Jul. 10, 2023 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Jul. 10, 2023 |
| Entity File Number | 001-39924 |
| Entity Registrant Name | Crown Electrokinetics Corp. |
| Entity Central Index Key | 0001761696 |
| Entity Tax Identification Number | 47-5423944 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 1110 NE Circle Blvd. |
| Entity Address, City or Town | Corvallis |
| Entity Address, State or Province | OR |
| Entity Address, Postal Zip Code | 97330 |
| City Area Code | 800 |
| Local Phone Number | 674-3612 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, $0.0001 par value |
| Trading Symbol | CRKN |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | true |
| Elected Not To Use the Extended Transition Period | false |
