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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)

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