Document and Entity Information - shares	9 Months Ended
	Dec. 31, 2020	Jan. 25, 2021
Cover [Abstract]
Entity Registrant Name	NEXTGEN HEALTHCARE, INC.
Trading Symbol	NXGN
Entity Central Index Key	0000708818
Document Type	10-Q
Document Period End Date	Dec. 31, 2020
Amendment Flag	false
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q3
Current Fiscal Year End Date	--03-31
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Shell Company	false
Entity Emerging Growth Company	false
Entity Current Reporting Status	Yes
Entity File Number	001-12537
Entity Tax Identification Number	95-2888568
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	CA
Entity Address, Postal Zip Code	92612
City Area Code	(949)
Local Phone Number	255-2600
Entity Interactive Data Current	Yes
Title of 12(b) Security	Common Stock, $0.01 Par Value
Security Exchange Name	NASDAQ
Entity Incorporation, State or Country Code	CA
Document Quarterly Report	true
Document Transition Report	false
Entity Common Stock, Shares Outstanding		67,002,554