Cover - USD ($)	12 Months Ended
	Mar. 31, 2020	Jun. 22, 2020	Sep. 30, 2019
Cover [Abstract]
Entity Registrant Name	FCCC INC
Entity Central Index Key	0000730669
Document Type	10-K
Amendment Flag	false
Entity Voluntary Filers	No
Current Fiscal Year End Date	--03-31
Entity Well Known Seasoned Issuer	No
Entity Small Business	true
Entity Shell Company	true
Entity Emerging Growth Company	false
Entity Current Reporting Status	Yes
Document Period End Date	Mar. 31, 2020
Entity Filer Category	Non-accelerated Filer
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2020
Entity Common Stock Shares Outstanding		3,461,066
Entity Public Float			$ 390,256
Document Annual Report	true
Document Transition Report	false
Entity Interactive Data Current	Yes