Unaudited Condensed Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Feb. 28, 2018	Feb. 28, 2017	Feb. 28, 2018	Feb. 28, 2017
Statement Of Income And Comprehensive Income [Abstract]
Net loss	$ (1,132)	$ (1,149)	$ (1,524)	$ (1,845)
Other comprehensive loss, net of tax:
Foreign currency translation adjustments, net of tax of $0 for all periods presented	109	245	135	233
Comprehensive loss	(1,023)	(904)	(1,389)	(1,612)
Comprehensive loss attributable to noncontrolling interests		(11)		(16)
Comprehensive loss attributable to SemiLEDs stockholders	$ (1,023)	$ (893)	$ (1,389)	$ (1,596)