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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
Operating Activities: |  |
Net income | $ 57,573 | $ 9,636
Adjustments to reconcile net income to net cash provided by operating activities: |  |
Depreciation | 3,365 | 4,312
Stock-based compensation | 2,863 | 2,956
Unrealized mark-to-market gain on derivative contracts | (30) | 0
Bad debt expense, net | 100 | 101
Deferred income taxes | (41) | (1,783)
Changes in operating assets and liabilities: |  |
Accounts receivable, net | 22,812 | (63,300)
Contract assets and liabilities, net | 21,338 | 123,082
Inventories | (18,137) | (8,060)
Income taxes | (1,555) | 862
Prepaid expenses and other current assets | 1,671 | 1,026
Accounts payable | 22,879 | (11,919)
Accrued liabilities | (11,453) | (3,331)
Other, net | (494) | 1,932
Net cash provided by operating activities | 100,891 | 55,514
Investing Activities: |  |
Purchases of short-term investments | (12,551) | (3,695)
Maturities of short-term investments | 3,691 | 7,385
Purchases of property, plant and equipment | (2,138) | (3,356)
Purchase of intangible assets | (250) | 0
Proceeds from sale of property, plant and equipment | 0 | 12
Net cash provided by (used in) investing activities | (11,248) | 346
Financing Activities: |  |
Shares withheld in lieu of employee tax withholding | (6,476) | (582)
Dividends paid | (6,299) | (6,180)
Net cash used in financing activities | (12,775) | (6,762)
Net increase in cash and cash equivalents | 76,868 | 49,098
Effect of exchange rate changes on cash and cash equivalents | 513 | 987
Cash and cash equivalents at beginning of period | 245,875 | 101,954
Cash and cash equivalents at end of period | $ 323,256 | $ 152,039

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