| Cover | Mar. 22, 2023 |
| Cover [Abstract] | |
| Entity Registrant Name | FCCC, Inc. |
| Entity Central Index Key | 0000730669 |
| Document Type | 8-K |
| Amendment Flag | false |
| Entity Emerging Growth Company | true |
| Document Period End Date | Mar. 22, 2023 |
| Entity Ex Transition Period | false |
| Entity Incorporation State Country Code | NV |
| Entity Tax Identification Number | 06-0759497 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Entity File Number | 001-08589 |
| Entity Address Address Line 1 | 725 5th Ave |
| Entity Address Address Line 2 | Floor 15 |
| Entity Address City Or Town | New York City |
| Entity Address State Or Province | NY |
| Entity Address Postal Zip Code | 10022 |
| City Area Code | 917 |
| Local Phone Number | 624-8888 |
