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4. DISCONTINUED OPERATIONS - Summary of Income statement (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Revenues, net |  |  |  |
Energy hardware, software and services revenue | $ 11 | $ 600 | $ 140 | $ 9,157
Total revenues, net | 11 | 600 | 140 | 9,157
Costs and expenses |  |  |  |
Cost of revenues (exclusive of depreciation and amortization shown below) | 41 | 712 | 129 | 7,317
Professional fees | 9 | 1 | 113 | 64
Payroll expenses | 68 | 715 | 376 | 4,006
General and administrative expenses | (8) | 520 | 76 | 996
Impairment expense - fixed assets |  | 32 | 0 | 32
Impairment expense - intangibles |  | 1,402 | 0 | 1,402
Impairment expense - other | 0 | 2,144 | 100 | 2,144
Impairment expense - goodwill |  | 7,001 | 0 | 7,001
Depreciation and amortization |  | 801 | 0 | 2,282
Total costs and expenses | 110 | 13,328 | 794 | 25,244
Loss from operations | (99) | (12,728) | (654) | (16,087)
Other income (expense) |  |  |  |
Gain on disposal of assets | 0 | 0 | 1,721 | 0
Interest expense | (3) | (1) | (6) | (3)
Total other income (expense) | (3) | (1) | 1,715 | (3)
(Loss) Income before income tax (expense) or benefit | (102) | (12,729) | 1,061 | (16,090)
Income tax benefit (expense) | 0 | 0 | 0 | 0
Net income (loss) attributable to common shareholders | $ (102) | $ (12,729) | $ 1,061 | $ (16,090)

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