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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Cash flows from operating activities |  |
Net loss | $ (13,340) | $ (15,724)
Adjustments to reconcile net loss to net cash provided by operating activities: |  |
Depreciation and amortization | 18,100 | 21,866
Inventory write-downs and other asset write-offs | 1,470 | 0
Stock-based compensation | 5,112 | 3,202
Amortization and accretion on marketable securities | (541) | (704)
Deferred income taxes | 457 | (7,317)
(Gain) loss on disposals of property, plant and equipment | (8) | 266
Changes in operating assets and liabilities: |  |
Accounts receivable | 4,850 | 2,830
Inventories | (4,646) | 4,929
Accounts payable | (2,602) | 2,442
Deferred revenue | 10,462 | (321)
Accrued warranty and retrofit costs | 174 | (554)
Accrued compensation and tax withholdings | 650 | (979)
Accrued restructuring costs | (566) | (90)
Other assets and liabilities | 11,056 | 3,910
Net cash provided by operating activities | 30,628 | 13,756
Cash flows from investing activities |  |
Purchases of property, plant and equipment | (8,580) | (11,291)
Purchases of marketable securities | (40,754) | 0
Sales and maturities of marketable securities | 125,590 | 110,316
Net cash provided by investing activities | 76,256 | 99,025
Cash flows from financing activities |  |
Payments of finance leases | (215) | (198)
Withholding tax payments on net share settlements on equity awards | 0 | (2)
Share repurchases | 0 | (112,953)
Excise tax payment for settled share repurchases | (4,911) | 0
Net cash used in financing activities | (5,126) | (113,153)
Effects of exchange rate changes on cash, cash equivalents and restricted cash | (8,311) | 24,548
Net increase in cash, cash equivalents and restricted cash | 93,447 | 24,176
Cash, cash equivalents and restricted cash, beginning of period | 320,990 | 684,045
Cash, cash equivalents and restricted cash, end of period | 414,437 | 708,221
Supplemental disclosures: |  |
Cash paid / (received) for income taxes, net | (6,148) | 2,599
Purchases of property, plant and equipment included in accounts payable and accrued expenses | $ 3,249 | $ 2,164

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