Document and Entity Information - USD ($)	12 Months Ended
	Mar. 31, 2019	Jun. 24, 2019	Mar. 29, 2019
Document And Entity Information
Entity Registrant Name	FCCC INC
Entity Central Index Key	0000730669
Document Type	10-K
Document Period End Date	Mar. 31, 2019
Amendment Flag	false
Current Fiscal Year End Date	--03-31
Is Entity a Well-known Seasoned Issuer?	No
Is Entity a Voluntary Filer?	No
Is Entity's Reporting Status Current?	Yes
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		3,461,022
Entity Public Float			$ 211,288
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2019
Entity Emerging Growth Company	false
Entity Small Business	true
Entity Shell Company	true