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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Jun. 30, 2023 | Sep. 30, 2022 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022 | Sep. 30, 2022 | Dec. 31, 2022 | Dec. 31, 2021
Operating activities |  |  |  |  |  |  |  |
Net Income (Loss) | $ 3,483 | $ 13,289 | $ (5,570) | $ 5,794 | $ (14,508) | $ (1,219) | $ (1,624) | $ (128,493)
Adjustments to reconcile net income (loss) to net cash used in operating activities: |  |  |  |  |  |  |  |
Depreciation and amortization | 7,049 |  | 7,670 | 13,938 | 15,229 |  |  |
Stock-based compensation expense |  |  |  | 5,143 | 5,100 |  |  |
Restructuring and other charges |  |  |  | (841) | 5,744 |  |  |
Gain on sale of property, plant and equipment | (738) |  | (380) | (7,385) | (494) |  |  |
Deferred income taxes |  |  |  | 734 | 1,098 |  |  |
Changes in operating assets and liabilities: |  |  |  |  |  |  |  |
Trade receivables, net |  |  |  | (42,446) | 13,396 |  |  |
Unbilled receivables |  |  |  | 6,356 | (28,434) |  |  |
Inventories, net |  |  |  | (15,331) | 4,663 |  |  |
Prepaids and other assets |  |  |  | 1,652 | (11,432) |  |  |
Accounts payable and accrued expenses |  |  |  | (9,252) | (10,560) |  |  |
Other, net |  |  |  | 0 | (11) |  |  |
Net cash used in operating activities |  |  |  | (41,638) | (20,209) |  |  |
Investing activities |  |  |  |  |  |  |  |
Purchase of property, plant and equipment |  |  |  | (15,611) | (3,429) |  |  |
Proceeds from sale of property, plant and equipment |  |  |  | 16,240 | 582 |  |  |
Purchase of short-term investments |  |  |  | (20,462) | 0 |  |  |
Maturities of short-term investments |  |  |  | 33,899 | 0 |  |  |
Net cash provided by (used in) investing activities |  |  |  | 14,066 | (2,847) |  |  |
Financing activities |  |  |  |  |  |  |  |
Repurchase of common shares |  |  |  | 0 | (9,657) |  |  |
Other |  |  |  | (22) | (83) |  |  |
Net cash used in financing activities |  |  |  | (22) | (9,740) |  |  |
Effect of exchange rate changes on cash activities |  |  |  | (720) | (1,871) |  |  |
Decrease in cash and cash equivalents |  |  |  | (28,314) | (34,667) |  |  |
Cash and cash equivalents at beginning of period |  | $ 320,784 |  | 264,804 | 355,451 | $ 355,451 | 355,451 |
Cash and cash equivalents at end of period | $ 236,490 |  | $ 320,784 | $ 236,490 | $ 320,784 |  | $ 264,804 | $ 355,451

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