Document and Entity Information - shares
3 Months Ended
Jun. 30, 2019
Jul. 22, 2019
Document And Entity Information [Abstract]    
Entity Registrant Name NEXTGEN HEALTHCARE, INC.  
Trading Symbol NXGN  
Entity Central Index Key 0000708818  
Document Type 10-Q  
Document Period End Date Jun. 30, 2019  
Amendment Flag false  
Document Fiscal Year Focus 2020  
Document Fiscal Period Focus Q1  
Current Fiscal Year End Date --03-31  
Entity Filer Category Large Accelerated Filer  
Entity Current Reporting Status Yes  
Entity Small Business false  
Entity Shell Company false  
Entity Emerging Growth Company false  
Entity File Number 001-12537  
Entity Tax Identification Number 952888568  
Entity Address, Address Line One 18111 Von Karman Avenue  
Entity Address, Address Line Two Suite 800  
Entity Address, City or Town Irvine  
Entity Address, State or Province California  
Entity Address, Postal Zip Code 92612  
City Area Code (949)  
Local Phone Number 255-2600  
Entity Common Stock, Shares Outstanding   65,381,886