| Document and Entity Information | Aug. 16, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Aug. 16, 2021 |
| Entity Registrant Name | QUEST RESOURCE HOLDING CORPORATION |
| Entity Central Index Key | 0001442236 |
| Entity Emerging Growth Company | false |
| Entity File Number | 001-36451 |
| Entity Incorporation, State or Country Code | NV |
| Entity Tax Identification Number | 51-0665952 |
| Entity Address, Address Line One | 3481 Plano Parkway |
| Entity Address, City or Town | The Colony |
| Entity Address, State or Province | TX |
| Entity Address, Postal Zip Code | 75056 |
| City Area Code | 972 |
| Local Phone Number | 464-0004 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, $0.001 par value |
| Trading Symbol | QRHC |
| Security Exchange Name | NASDAQ |
