Summary of Significant Accounting Policies - Basis of Presentation and Use of Estimates (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	May 31, 2022	May 31, 2021	May 31, 2022	May 31, 2021	Aug. 31, 2021	Aug. 31, 2020
Accounting Policies [Abstract]
Losses from operations	$ 774	$ 592	$ 2,131	$ 2,071	$ 3,900	$ 2,100
Gross profits (losses) on product sales	336	$ 664	1,062	883	1,000	1,600
Net cash used in operating activities			1,863	$ 826	1,700	$ 1,000
Cash and cash equivalents	$ 3,023		$ 3,023		$ 4,833