| Document and Entity Information | Aug. 29, 2024 |
| Cover [Abstract] | |
| Document Type | 8-K/A |
| Amendment Flag | true |
| Amendment Description | In a Current Report on Form 8-K filed with the Securities and Exchange Commission on September 3, 2024, SemiLEDs Corporation (the “Company”) announced, among other things, on August 29, 2024, the Company amended its Amended and Restated Certificate of Incorporation, as amended, to increase the number of authorized share of common stock from 7,500,000 to 15,000,000, and to include an officer exculpation provision. This Current Report on Form 8-K/A is being filed to revise the aforementioned effective date to October 11, 2024. |
| Document Period End Date | Aug. 29, 2024 |
| Entity Registrant Name | SEMILEDS CORPORATION |
| Entity Incorporation, State or Country Code | DE |
| Current Fiscal Year End Date | --08-31 |
| Entity File Number | 001-34992 |
| Entity Tax Identification Number | 20-2735523 |
| Entity Address, Address Line One | 3F, No.11 Ke Jung Rd., Chu-Nan Site |
| Entity Address, Address Line Two | Hsinchu Science Park, Chu-Nan 350 |
| Entity Address, City or Town | Miao-Li County |
| Entity Address, Country | TW |
| Entity Address, Postal Zip Code | 350 |
| City Area Code | 886 |
| Local Phone Number | 37-586788 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0001333822 |
| Title of 12(b) Security | Common Stock, par value $0.0000056 |
| Trading Symbol | LEDS |
| Security Exchange Name | NASDAQ |
