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Note 3 - Discontinued Operations (Tables) | 12 Months Ended
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Sep. 30, 2025
Notes Tables |
Disposal Groups, Including Discontinued Operations [Table Text Block] |
|  | Year Ended September 30, |
|  | 2025 |  |  | 2024 |  |  | 2023 |
Revenue |  |  |  |  |  |  |  |  |  |  |  |
Products |  | $ | 58,569 |  |  | $ | 69,690 |  |  | $ | 101,091 |
Services |  |  | 9,399 |  |  |  | 13,435 |  |  |  | 12,032 |
Total revenue |  |  | 67,968 |  |  |  | 83,125 |  |  |  | 113,123 |
Cost of revenue |  |  |  |  |  |  |  |  |  |  |  |
Products |  |  | 41,073 |  |  |  | 64,871 |  |  |  | 85,315 |
Services |  |  | 8,906 |  |  |  | 12,360 |  |  |  | 7,294 |
Total cost of revenue |  |  | 49,979 |  |  |  | 77,231 |  |  |  | 92,609 |
Gross profit |  |  | 17,989 |  |  |  | 5,894 |  |  |  | 20,514 |
Operating expenses |  |  |  |  |  |  |  |  |  |  |  |
Research and development |  |  | 5,785 |  |  |  | 4,704 |  |  |  | 4,046 |
Selling, general and administrative |  |  | 25,739 |  |  |  | 34,949 |  |  |  | 47,361 |
Impairment of goodwill and intangible assets |  |  | - |  |  |  | 111,317 |  |  |  | - |
Contingent consideration - fair value adjustments |  |  | - |  |  |  | - |  |  |  | (18,549 | )
Loss on assets held for sale |  |  | 93,118 |  |  |  | - |  |  |  | - |
Restructuring charges |  |  | 1,235 |  |  |  | 5,042 |  |  |  | - |
Total operating expenses |  |  | 125,877 |  |  |  | 156,012 |  |  |  | 32,858 |
Operating loss |  |  | (107,888 | ) |  |  | (150,118 | ) |  |  | (12,344 | )
Interest income (expense), net |  |  | 40 |  |  |  | 286 |  |  |  | 194 |
Other income (expense), net |  |  | (212 | ) |  |  | 911 |  |  |  | 1,258 |
Loss before income taxes |  |  | (108,060 | ) |  |  | (148,921 | ) |  |  | (10,892 | )
Income tax benefit |  |  | (28,518 | ) |  |  | (8,390 | ) |  |  | (5,670 | )
Loss from discontinued operations, net of tax |  | $ | (79,542 | ) |  | $ | (140,531 | ) |  | $ | (5,222 | )
Disposal Groups, Including Discontinued Operations, Statement of Cash Flows [Table Text Block] |
|  | Year Ended September 30, |
|  | 2025 |  |  | 2024 |  |  | 2023 |
Depreciation and amortization |  | $ | 3,768 |  |  | $ | 7,810 |  |  | $ | 7,935 |
Capital expenditures |  |  | 2,356 |  |  |  | 3,344 |  |  |  | 11,569 |
Impairment of goodwill |  |  | - |  |  |  | 111,317 |  |  |  | - |
Loss on assets held for sale |  |  | 93,118 |  |  |  | - |  |  |  | - |
Schedule of Disposal Groups, Including Discontinued Operations, Balance Sheet [Table Text Block] |
|  |  | September 30, 2025 |  |  | September 30, 2024 |
Assets |  |  |  |  |  |  |  |  |
Cash and cash equivalents |  |  | $ | 13,206 |  |  | $ | 30,899 |
Accounts receivable, net |  |  |  | 10,090 |  |  |  | 18,539 |
Inventories |  |  |  | 42,137 |  |  |  | 44,390 |
Prepaid expenses and other current assets |  |  |  | 8,102 |  |  |  | 5,224 |
Current Assets held for sale |  |  | $ | 73,535 |  |  | $ | 99,052 |
Property, plant and equipment, net |  |  | $ | 50,968 |  |  | $ | 47,032 |
Intangibles, net |  |  |  | 126,065 |  |  |  | 122,988 |
Other assets |  |  |  | 4,828 |  |  |  | 3,774 |
Valuation allowance |  |  |  | (96,855 | ) |  |  | - |
Noncurrent assets held for sale |  |  | $ | 85,006 |  |  | $ | 173,794 |
Liabilities |  |  |  |  |  |  |  |  |
Accounts payable |  |  | $ | 11,710 |  |  | $ | 11,089 |
Deferred revenue |  |  |  | 1,543 |  |  |  | 1,485 |
Accrued warranty and retrofit costs |  |  |  | 5,248 |  |  |  | 4,916 |
Accrued compensation and benefits |  |  |  | 3,909 |  |  |  | 2,929 |
Accrued income taxes |  |  |  | 760 |  |  |  | 4,012 |
Accrued expenses and other current liabilities |  |  |  | 5,098 |  |  |  | 5,619 |
Current liabilities held for sale |  |  | $ | 28,268 |  |  | $ | 30,050 |
Long-term deferred tax liabilities |  |  |  | 9,639 |  |  |  | 36,093 |
Long-term operating lease liabilities |  |  |  | 2,077 |  |  |  | 2,109 |
Other long-term liabilities |  |  |  | 2,575 |  |  |  | 3,994 |
Noncurrent liabilities held for sale |  |  | $ | 14,291 |  |  | $ | 42,196 |

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