| Document and Entity Information | Jun. 18, 2021 |
| Cover [Abstract] | |
| Entity Incorporation State Country Code | CA |
| Entity Address, State or Province | GA |
| Amendment Flag | false |
| Entity Central Index Key | 0000708818 |
| Current Fiscal Year End Date | --03-31 |
| Document Type | 8-K |
| Document Period End Date | Jun. 18, 2021 |
| Entity Registrant Name | NEXTGEN HEALTHCARE, INC. |
| Entity File Number | 001-12537 |
| Entity Tax Identification Number | 95-2888568 |
| Entity Address, Address Line One | 3525 Piedmont Rd. |
| Entity Address, Address Line Two | NE |
| Entity Address, Address Line Three | Building 6, Suite 700 |
| Entity Address, City or Town | Atlanta |
| Entity Address, Postal Zip Code | 30305 |
| City Area Code | (404) |
| Local Phone Number | 467-1500 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Common Stock (Par Value $0.01) |
| Trading Symbol | NXGN |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
