Balance Sheet Components - Intangible Assets (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Feb. 28, 2023	Aug. 31, 2022
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 915	$ 915
Accumulated Amortization	820	813
Total	$ 95	$ 102
Patents and trademarks
Finite Lived Intangible Assets [Line Items]
Weighted Average Amortization Period (Years)	15 years	15 years
Gross Carrying Amount	$ 580	$ 580
Accumulated Amortization	485	478
Total	$ 95	$ 102
Acquired technology
Finite Lived Intangible Assets [Line Items]
Weighted Average Amortization Period (Years)	5 years	5 years
Gross Carrying Amount	$ 335	$ 335
Accumulated Amortization	$ 335	$ 335