4. DISCONTINUED OPERATIONS - Summary of Income statement (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Revenues, net
Energy hardware, software and services revenue	$ 28	$ 4,439	$ 129	$ 8,557
Total revenues, net	28	4,439	129	8,557
Costs and expenses
Cost of revenues (exclusive of depreciation and amortization shown below)	40	3,531	88	6,605
Professional fees	104	(10)	104	63
Payroll expenses	34	1,735	308	3,291
General and administrative expenses	53	172	84	476
Impairment expense - other	100	0	100
Depreciation and amortization		1,211	0	1,481
Total costs and expenses	331	6,639	684	11,916
Loss from operations	(303)	(2,200)	(555)	(3,359)
Other income (expense)
Gain on disposal of assets	11	0	1,721	0
Interest expense	(2)	(3)	(3)	(2)
Total other income (expense)	9	(3)	1,718	(2)
(Loss) Income before income tax (expense) or benefit	(294)	(2,203)	1,163	(3,361)
Income tax benefit (expense)	0	0	0	0
Net income (loss) attributable to common shareholders	$ (294)	$ (2,203)	$ 1,163	$ (3,361)