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, 2022	Feb. 28, 2021	Feb. 28, 2022	Feb. 28, 2021	Aug. 31, 2021	Aug. 31, 2020
Accounting Policies [Abstract]
Losses from operations	$ 379	$ 507	$ 1,357	$ 1,479	$ 3,900	$ 2,100
Gross profits (losses) on product sales	523	$ 241	726	219	1,000	1,600
Net cash used in operating activities			1,031	$ 625	1,700	$ 1,000
Cash and cash equivalents	$ 3,712		$ 3,712		$ 4,833