Balance Sheet Components - Intangible Assets (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Feb. 28, 2022	Aug. 31, 2021
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 984	$ 994
Accumulated Amortization	872	868
Total	$ 112	$ 126
Patents and trademarks
Finite Lived Intangible Assets [Line Items]
Weighted Average Amortization Period (Years)	15 years	15 years
Gross Carrying Amount	$ 621	$ 627
Accumulated Amortization	509	501
Total	$ 112	$ 126
Acquired technology
Finite Lived Intangible Assets [Line Items]
Weighted Average Amortization Period (Years)	5 years	5 years
Gross Carrying Amount	$ 363	$ 367
Accumulated Amortization	$ 363	$ 367