v3.5.0.2
Document and Entity Information - shares
6 Months Ended
Jul. 31, 2016
Aug. 31, 2016
Document and Entity Information [Abstract]    
Entity Registrant Name HEALTHEQUITY INC  
Entity Central Index Key 0001428336  
Current Fiscal Year End Date --01-31  
Entity Filer Category Large Accelerated Filer  
Document Type 10-Q  
Document Period End Date Jul. 31, 2016  
Document Fiscal Year Focus 2017  
Document Fiscal Period Focus Q2  
Amendment Flag false  
Entity Common Stock, Shares Outstanding   58,641,564