Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2020	Aug. 31, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net loss	$ (547)	$ (3,565)
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments, net of tax of $0 for both periods	(103)	25
Comprehensive loss	(650)	(3,540)
Comprehensive loss attributable to noncontrolling interests		(1)
Comprehensive loss attributable to SemiLEDs stockholders	$ (650)	$ (3,539)