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Note 11 - Supplementary Balance Sheet Information | 12 Months Ended
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Sep. 30, 2024
Notes to Financial Statements |
Supplemental Balance Sheet Disclosures [Text Block] | 11. Supplementary Balance Sheet Information The following is a summary of accounts receivable at September 30, 2024 and 2023 (in thousands):
|  | September 30, |
|  | 2024 |  |  | 2023 |
Accounts receivable |  | $ | 179,269 |  |  | $ | 164,592 |
Less allowance for expected credit losses |  |  | (6,558 | ) |  |  | (8,057 | )
Accounts receivable, net |  | $ | 172,711 |  |  | $ | 156,535 |
The allowance for expected credit losses for the fiscal years ended September 30, 2024, 2023 and 2022 is as follows (in thousands):
|  | Year Ended September 30, |
|  | 2024 |  |  | 2023 |  |  | 2022 |
Balance at beginning of period |  | $ | 8,057 |  |  | $ | 5,162 |  |  | $ | 4,318 |
Provisions |  |  | 7,250 |  |  |  | 8,849 |  |  |  | 3,536 |
Payments received |  |  | (7,455 | ) |  |  | (5,884 | ) |  |  | (2,278 | )
Write-offs and adjustments |  |  | (1,294 | ) |  |  | (70 | ) |  |  | (414 | )
Balance at end of period |  | $ | 6,558 |  |  | $ | 8,057 |  |  | $ | 5,162 |
The following is a summary of inventories at September 30, 2024 and 2023 (in thousands):
|  | September 30, |
|  | 2024 |  |  | 2023 |
Raw materials and purchased parts |  | $ | 57,230 |  |  | $ | 59,861 |
Work-in-process |  |  | 9,118 |  |  |  | 11,400 |
Finished goods |  |  | 48,908 |  |  |  | 56,937 |
Total inventories |  | $ | 115,256 |  |  | $ | 128,198 |
The activity for excess and obsolete inventory reserves is as follows for the fiscal years ended September 30, 2024, 2023 and 2022 (in thousands):
|  | Year Ended September 30, |
|  | 2024 |  |  | 2023 |  |  | 2022 |
Balance at beginning of period |  | $ | 4,991 |  |  | $ | 4,082 |  |  | $ | 3,681 |
Provisions |  |  | 8,186 |  |  |  | 3,324 |  |  |  | 1,752 |
Inventory disposals and adjustments |  |  | (3,022 | ) |  |  | (2,415 | ) |  |  | (1,351 | )
Balance at end of period |  | $ | 10,155 |  |  | $ | 4,991 |  |  | $ | 4,082 |
The activity for valuation allowance for deferred tax assets is as follows for the fiscal years ended September 30, 2024, 2023 and 2022 (in thousands):
|  | Year Ended September 30, |
|  | 2024 |  |  | 2023 |  |  | 2022 |
Balance at beginning of period |  | $ | 8,348 |  |  | $ | 5,927 |  |  | $ | 8,592 |
Charge to income tax provision (benefit) |  |  | 37,677 |  |  |  | 1,137 |  |  |  | 1,337 |
Charged to other accounts |  |  | 1,840 |  |  |  | 1,284 |  |  |  | (4,002 | )
Balance at end of period |  | $ | 47,865 |  |  | $ | 8,348 |  |  | $ | 5,927 |
The following is a summary of product warranty and retrofit activity on a gross basis for the fiscal years ended September 30, 2024, 2023 and 2022 (in thousands):
|  | Year Ended September 30, |
|  | 2024 |  |  | 2023 |  |  | 2022 |
Balance at beginning of period |  | $ | 10,223 |  |  | $ | 2,890 |  |  | $ | 2,330 |
Adjustments for acquisitions and divestitures |  |  | — |  |  |  | 2,475 |  |  |  | 254 |
Accruals for warranties during the year |  |  | 2,736 |  |  |  | 8,198 |  |  |  | 2,438 |
Costs incurred during the year |  |  | (2,830 | ) |  |  | (3,340 | ) |  |  | (2,132 | )
Balance at end of period |  | $ | 10,129 |  |  | $ | 10,223 |  |  | $ | 2,890 |

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