Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended				9 Months Ended		12 Months Ended
	May 31, 2022	Nov. 30, 2021	May 31, 2021	Nov. 30, 2020	May 31, 2022	May 31, 2021	Aug. 31, 2021	Aug. 31, 2020
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (911)	$ (525)	$ (57)	$ (707)	$ (1,588)	$ (1,018)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization					635	674
Stock-based compensation expense					329	135
Provisions for inventory write-downs	176		159		592	555
Gain on disposals of long-lived assets, net	(57)		(2)		(196)	(286)
Loss on disposals of patent					9
Changes in :
Accounts receivable					(597)	576
Inventories					(882)	(1,536)
Prepaid expenses and other					104	80
Accounts payable					(143)	(35)
Accrued expenses and other current liabilities					(126)	29
Net cash used in operating activities					(1,863)	(826)	$ (1,700)	$ (1,000)
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property, plant and equipment					(69)	(111)
Proceeds from sales of property, plant and equipment					187	291
Payments for development of intangible assets					(11)	(12)
Net cash provided by investing activities					107	168
CASH FLOWS FROM FINANCING ACTIVITIES:
Repayments of long-term debt					(368)	(43)
Issuance of common stock in registered offering					1
Acquisition of noncontrolling interests					(23)	(12)
Net cash used in financing activities					(390)	(55)
Effect of exchange rate changes on cash and cash equivalents and restricted cash					327	(438)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS AND RESTRICTED CASH					(1,819)	(1,151)
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH—Beginning of period		$ 5,028		$ 3,012	5,028	3,012	3,012
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH—End of period	$ 3,209		$ 1,861		3,209	1,861	$ 5,028	$ 3,012
NONCASH INVESTING AND FINANCING ACTIVITIES:
Accrual related to property, plant and equipment					$ 56	$ 3