Summary of Significant Accounting Policies - Basis of Presentation and Use of Estimates (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Feb. 28, 2023	Feb. 28, 2022	Feb. 28, 2023	Feb. 28, 2022	Aug. 31, 2022	Aug. 31, 2021
Accounting Policies [Abstract]
Losses from operations	$ 702	$ 379	$ 1,356	$ 1,357	$ 3,200	$ 3,900
Gross profits (losses) on product sales	262	$ 523	725	726	1,400	1,000
Net cash used in operating activities			85	$ 1,031	1,500	$ 1,700
Cash and cash equivalents	$ 3,859		$ 3,859		$ 4,274