Document and Entity Information - shares	9 Months Ended
	Dec. 31, 2019	Feb. 11, 2020
Document And Entity Information
Entity Registrant Name	FCCC INC
Entity Central Index Key	0000730669
Document Type	10-Q
Amendment Flag	false
Current Fiscal Year End Date	--03-31
Entity Small Business	true
Entity Shell Company	true
Entity Emerging Growth Company	false
Entity Current Reporting Status	Yes
Document Period End Date	Dec. 31, 2019
Entity Filer Category	Non-accelerated Filer
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2020
Entity Common Stock Shares Outstanding		3,461,022
EntityFileNumber	001-08589
EntityAddressAddressLine1	1650 West 106th Street
EntityAddressAddressLine2	Carmel
EntityAddressPostalZipCode	46032
EntityTaxIdentificationNumber	060759497
EntityAddressCityOrTown	Carmel
LocalPhoneNumber	441-4563
CityAreaCode	317
EntityAddressStateOrProvince	INDIANA