XML 11 R1.htm IDEA: XBRL DOCUMENT v3.3.1.900
Document And Entity Information - shares
 6 Months Ended
Oct. 31, 2015
Dec. 11, 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   8,702,237
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Oct. 31, 2015  
Document Fiscal Period Focus Q2  
Document Fiscal Year Focus 2016