Document and Entity Information - shares	9 Months Ended
	Dec. 31, 2016	Feb. 09, 2017
Document And Entity Information
Entity Registrant Name	FCCC INC
Entity Central Index Key	0000730669
Document Type	10-Q
Document Period End Date	Dec. 31, 2016
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	Smaller Reporting Company
Entity Common Stock, Shares Outstanding		3,461,022
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2017