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Note 3 - Discontinued Operations (Tables) | 6 Months Ended
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Mar. 31, 2025
Notes Tables |
Disposal Groups, Including Discontinued Operations [Table Text Block] |
|  | Three Months Ended March 31, |  |  | Six Months Ended March 31, |
|  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |
Revenue |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Products |  | $ | 15,886 |  |  | $ | 20,245 |  |  | $ | 30,174 |  |  | $ | 29,931 |
Services |  |  | 1,320 |  |  |  | 2,534 |  |  |  | 4,623 |  |  |  | 5,440 |
Total revenue |  |  | 17,206 |  |  |  | 22,779 |  |  |  | 34,797 |  |  |  | 35,371 |
Cost of revenue |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Products |  |  | 10,118 |  |  |  | 17,642 |  |  |  | 21,540 |  |  |  | 27,698 |
Services |  |  | 1,415 |  |  |  | 2,415 |  |  |  | 4,721 |  |  |  | 5,183 |
Total cost of revenue |  |  | 11,533 |  |  |  | 20,057 |  |  |  | 26,261 |  |  |  | 32,881 |
Gross profit |  |  | 5,673 |  |  |  | 2,722 |  |  |  | 8,536 |  |  |  | 2,490 |
Operating expenses |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Research and development |  |  | 1,201 |  |  |  | 973 |  |  |  | 2,836 |  |  |  | 2,153 |
Selling, general and administrative |  |  | 7,729 |  |  |  | 9,256 |  |  |  | 13,916 |  |  |  | 17,943 |
Impairment of goodwill and intangible assets |  |  | - |  |  |  | 111,317 |  |  |  | - |  |  |  | 111,317 |
Loss on assets held for sale |  |  | 24,187 |  |  |  | - |  |  |  | 24,187 |  |  |  | - |
Restructuring charges |  |  | 364 |  |  |  | 3,917 |  |  |  | 678 |  |  |  | 4,251 |
Total operating expenses |  |  | 33,481 |  |  |  | 125,463 |  |  |  | 41,617 |  |  |  | 135,664 |
Operating loss |  |  | (27,808 | ) |  |  | (122,741 | ) |  |  | (33,081 | ) |  |  | (133,174 | )
Interest income (expense), net |  |  | (15 | ) |  |  | 85 |  |  |  | (10 | ) |  |  | 212 |
Other income (expense), net |  |  | (604 | ) |  |  | 518 |  |  |  | (74 | ) |  |  | 682 |
Loss before income taxes |  |  | (28,427 | ) |  |  | (122,138 | ) |  |  | (33,165 | ) |  |  | (132,280 | )
Income tax benefit |  |  | (6,536 | ) |  |  | (1,460 | ) |  |  | (7,355 | ) |  |  | (3,070 | )
Loss from discontinued operations, net of tax |  | $ | (21,891 | ) |  | $ | (120,678 | ) |  | $ | (25,810 | ) |  | $ | (129,210 | )
Disposal Groups, Including Discontinued Operations, Statement of Cash Flows [Table Text Block] |
|  | Three Months Ended March 31, |  |  | Six Months Ended March 31, |
|  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |
Depreciation and amortization |  | $ | - |  |  | $ | 7,733 |  |  | $ | 3,846 |  |  | $ | 14,952 |
Capital expenditures |  |  | 371 |  |  |  | 751 |  |  |  | 1,128 |  |  |  | 1,997 |
Impairment of goodwill |  |  | - |  |  |  | 111,317 |  |  |  | - |  |  |  | 111,317 |
Loss on assets held for sale |  |  | 24,187 |  |  |  | - |  |  |  | 24,187 |  |  |  | - |
Schedule of Disposal Groups, Including Discontinued Operations, Balance Sheet [Table Text Block] |
|  | March 31, 2025 |  |  | September 30, 2024 |
Assets |  |  |  |  |  |  |  |
Cash and cash equivalents |  | $ | 27,025 |  |  | $ | 30,899 |
Accounts receivable, net |  |  | 13,061 |  |  |  | 16,438 |
Inventories |  |  | 33,800 |  |  |  | 36,333 |
Prepaid expenses and other current assets |  |  | 5,868 |  |  |  | 5,224 |
Current assets held for sale |  | $ | 79,754 |  |  | $ | 88,894 |
Property, plant and equipment, net |  | $ | 45,609 |  |  | $ | 47,032 |
Intangibles, net |  |  | 116,230 |  |  |  | 122,988 |
Other assets |  |  | 3,390 |  |  |  | 3,774 |
Valuation allowance |  |  | (24,266 | ) |  |  | - |
Noncurrent assets held for sale |  | $ | 140,963 |  |  | $ | 173,794 |
Liabilities |  |  |  |  |  |  |  |
Accounts payable |  | $ | 9,247 |  |  | $ | 11,089 |
Deferred revenue |  |  | 2,082 |  |  |  | 1,485 |
Accrued warranty and retrofit costs |  |  | 4,969 |  |  |  | 4,916 |
Accrued compensation and benefits |  |  | 3,428 |  |  |  | 2,929 |
Accrued income taxes |  |  | 706 |  |  |  | 4,012 |
Accrued expenses and other current liabilities |  |  | 8,501 |  |  |  | 5,619 |
Current liabilities held for sale |  | $ | 28,933 |  |  | $ | 30,050 |
Long-term deferred tax liabilities |  |  | 28,108 |  |  |  | 36,093 |
Long-term operating lease liabilities |  |  | 1,877 |  |  |  | 2,109 |
Other long-term liabilities |  |  | 3,102 |  |  |  | 3,994 |
Noncurrent liabilities held for sale |  | $ | 33,087 |  |  | $ | 42,196 |

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