| Cover Page Document | Dec. 11, 2020 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Dec. 11, 2020 |
| Entity Registrant Name | MODEL N, INC. |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-35840 |
| Entity Tax Identification Number | 77-0528806 |
| Entity Address, Address Line One | 777 Mariners Island Boulevard |
| Entity Address, Address Line Two | Suite 300 |
| Entity Address, City or Town | San Mateo |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 94404 |
| City Area Code | 650 |
| Local Phone Number | 610-4600 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, par value $0.00015 per share |
| Trading Symbol | MODN |
| Name of each exchange on which registered | NYSE |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0001118417 |
| Amendment Flag | false |
