Document and Entity Information
6 Months Ended
Sep. 30, 2015
Oct. 30, 2015
Document And Entity Information [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Sep. 30, 2015  
Document Fiscal Year Focus 2016  
Document Fiscal Period Focus Q2  
Trading Symbol ONVO  
Entity Registrant Name ORGANOVO HOLDINGS, INC.  
Entity Central Index Key 0001497253  
Current Fiscal Year End Date --03-31  
Entity Filer Category Accelerated Filer  
Entity Common Stock, Shares Outstanding   92,413,710