| Cover | Feb. 03, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Feb. 3, 2021 |
| Entity Registrant Name | Inovalon Holdings, Inc. |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-36841 |
| Entity Tax Identification Number | 47-1830316 |
| Entity Address, Address Line One | 4321 Collington Road |
| Entity Address, City or Town | Bowie, |
| Entity Address, State or Province | MD |
| Entity Address, Postal Zip Code | 20716 |
| City Area Code | 301 |
| Local Phone Number | 809-4000 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Class A Common Stock, $0.000005 par value per share |
| Security Exchange Name | NASDAQ |
| Trading Symbol | INOV |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0001619954 |
| Amendment Flag | false |
