| Cover | Nov. 19, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Nov. 19, 2021 |
| Entity File Number | 000-56025 |
| Entity Registrant Name | QUANTA, INC. |
| Entity Central Index Key | 0001691430 |
| Entity Tax Identification Number | 81-2749032 |
| Entity Incorporation, State or Country Code | NV |
| Entity Address, Address Line One | 632 S Glenwood Place |
| Entity Address, City or Town | Burbank |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 91506 |
| City Area Code | (818) |
| Local Phone Number | 659-8052 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock |
| Trading Symbol | QNTA |
| Entity Emerging Growth Company | false |
