| Cover | Jan. 10, 2023 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Jan. 10, 2023 |
| Entity File Number | 001-31543 |
| Entity Registrant Name | FLUX POWER HOLDINGS, INC. |
| Entity Central Index Key | 0001083743 |
| Entity Tax Identification Number | 86-0931332 |
| Entity Incorporation, State or Country Code | NV |
| Entity Address, Address Line One | 2685 S. Melrose Drive |
| Entity Address, City or Town | Vista |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 92081 |
| City Area Code | 877 |
| Local Phone Number | 505-3589 |
| 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 | FLUX |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
