| Cover | Jan. 18, 2022 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Jan. 18, 2022 |
| Entity File Number | 0-55320 |
| Entity Registrant Name | Nexien BioPharma, Inc. |
| Entity Central Index Key | 0001625288 |
| Entity Tax Identification Number | 26-2049376 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 4340 E Kentucky Ave |
| Entity Address, Address Line Two | Suite 206 |
| Entity Address, City or Town | Glendale |
| Entity Address, State or Province | CO |
| Entity Address, Postal Zip Code | 80246 |
| City Area Code | (303) |
| Local Phone Number | 495-7583 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | true |
| Elected Not To Use the Extended Transition Period | false |
