Unaudited Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Feb. 28, 2018	Feb. 28, 2017	Feb. 28, 2018	Feb. 28, 2017
Income Statement [Abstract]
Revenues, net	$ 1,543	$ 1,830	$ 3,546	$ 4,532
Cost of revenues	1,987	1,823	3,938	4,409
Gross profit (loss)	(444)	7	(392)	123
Operating expenses:
Research and development	223	195	407	394
Selling, general and administrative	781	941	1,514	2,041
Gain on disposals of long-lived assets, net	(209)		(209)	(80)
Total operating expenses	795	1,136	1,712	2,355
Loss from operations	(1,239)	(1,129)	(2,104)	(2,232)
Other income (expenses):
Equity in loss from unconsolidated entities		(2)		(11)
Interest expenses, net	(7)	(8)	(15)	(17)
Other income, net	49	20	547	496
Foreign currency transaction gain (loss), net	65	(30)	48	(81)
Total other income (expenses), net	107	(20)	580	387
Loss before income taxes	(1,132)	(1,149)	(1,524)	(1,845)
Net loss	(1,132)	(1,149)	(1,524)	(1,845)
Less: Net loss attributable to noncontrolling interests		(7)		(13)
Net loss attributable to SemiLEDs stockholders	$ (1,132)	$ (1,142)	$ (1,524)	$ (1,832)
Net loss per share attributable to SemiLEDs stockholders:
Basic and diluted	$ (0.32)	$ (0.32)	$ (0.43)	$ (0.52)
Shares used in computing net loss per share attributable to SemiLEDs stockholders:
Basic and diluted	3,545	3,532	3,545	3,532