Document And Entity Information	9 Months Ended
	Jan. 31, 2015	Mar. 13, 2015
Document Information [Line Items]
Entity Registrant Name	CHAMPIONS ONCOLOGY, INC.
Entity Central Index Key	0000771856
Current Fiscal Year End Date	--04-30
Entity Filer Category	Smaller Reporting Company
Trading Symbol	CSBR
Entity Common Stock, Shares Outstanding		104,026,506
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jan. 31, 2015
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2015