Document and Entity Information - USD ($)	12 Months Ended
	Mar. 31, 2021	Sep. 30, 2021	May 24, 2021
Cover [Abstract]
Entity Registrant Name	NEXTGEN HEALTHCARE, INC.
Document Type	10-K/A
Amendment Flag	true
Amendment Description	This Amendment No. 1 on Form 10-K/A (this “Form 10-K/A”) to the Annual Report on Form 10-K of NextGen Healthcare, Inc. for the fiscal year ended March 31, 2021, filed with the Securities and Exchange Commission (the “SEC”) on May 26, 2021 (the “Original 10-K”) is being filed solely for the purpose of including the information required by Part III on Form 10-K. This information was previously omitted from the Original 10-K in reliance on General Instruction G(3) to Form 10-K, which permits the information in the above referenced items to be incorporated in the Form 10-K by reference from our definitive proxy statement if such statement is filed no later than 120 days after our fiscal year-end. We are filing this Amendment No. 1 to include Part III information in our Form 10-K because we will not file a definitive proxy statement containing such information within 120 days after the end of the fiscal year covered by the Original 10-K. In addition, this Form 10-K/A deletes the reference on the cover of the Original 10-K to the incorporation by reference of portions of our proxy statement into Part III of the Original 10-K. Pursuant to Rule 12b-15 under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), this Form 10-K/A also contains certifications pursuant to Section 302 of the Sarbanes-Oxley Act of 2002, which are attached hereto. Because no financial statements have been included in this Form 10-K/A and this Form 10-K/A does not contain or amend any disclosure with respect to Items 307 and 30 of Regulation S-K, paragraphs 3,4, and 5 of the certifications have been omitted. Except as described above, this Form 10-K/A does not modify or update disclosure in the Original 10-K. Furthermore, this Form 10-K/A does not change any previously reported financial results. Information not affected by this Form 10-K/A remains unchanged and reflects the disclosures made at the time the Original 10-K was filed.
Document Period End Date	Mar. 31, 2021
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Current Fiscal Year End Date	--03-31
Entity Filer Category	Large Accelerated Filer
Entity Public Float		$ 704,935,000
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	Yes
Entity Current Reporting Status	Yes
Entity Small Business	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Common Stock, Shares Outstanding			67,031,182
Document Annual Report	true
Document Transition Report	false
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	3525 Piedmont Rd., NE
Entity Address, Address Line Two	Building 6, Suite 700
Entity Address, City or Town	Atlanta
Entity Address, State or Province	GA
Entity Address, Postal Zip Code	30305
City Area Code	(404)
Local Phone Number	467-1500
Title of 12(b) Security	Common Stock, $0.01 Par Value
Security Exchange Name	NASDAQ
Trading Symbol	NXGN
Entity Interactive Data Current	Yes