Document and Entity Information - USD ($) $ in Millions	12 Months Ended
	Aug. 31, 2023	Nov. 27, 2023	Feb. 28, 2023
Cover [Abstract]
Entity Registrant Name	SemiLEDs Corp
Entity Central Index Key	0001333822
Trading Symbol	LEDS
Document Type	10-K
Document Period End Date	Aug. 31, 2023
Amendment Flag	false
Current Fiscal Year End Date	--08-31
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Filer Category	Non-accelerated Filer
Entity Current Reporting Status	Yes
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Public Float			$ 7.2
Entity Common Stock, Shares Outstanding		4,940,910
Title of 12(b) Security	Common Stock, par value $0.0000056
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	FY
Security Exchange Name	NASDAQ
Entity File Number	001-34992
Entity Tax Identification Number	20-2735523
Entity Address, Address Line One	3F, No.11 Ke Jung Rd.
Entity Address, Address Line Two	Chu-Nan Site
Entity Address, Address Line Three	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
Document Transition Report	false
Document Annual Report	true
Entity Interactive Data Current	Yes
Entity Incorporation, State or Country Code	DE
ICFR Auditor Attestation Flag	false
Auditor Name	KCCW Accountancy Corp.
Auditor Location	Diamond Bar, California
Auditor Firm ID	2851
Document Financial Statement Error Correction [Flag]	false