| Document and Entity Information | Oct. 22, 2020 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Oct. 22, 2020 |
| Entity Registrant Name | NEXTGEN HEALTHCARE, INC. |
| Entity Central Index Key | 0000708818 |
| Entity Emerging Growth Company | false |
| Entity File Number | 001-12537 |
| Entity Incorporation, State or Country Code | CA |
| 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 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of each class | Common Stock (Par Value $0.01) |
| Trading Symbol | NXGN |
| Security Exchange Name | NASDAQ |
