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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Cash flows from operating activities:    
Net Income (Loss) $ (19,984) $ 2,311
Adjustments to reconcile net income (loss) to net cash used in operating activities:    
Depreciation and amortization 8,432 6,889
Stock-based compensation expense 2,788 2,577
Restructuring and other charges 0 683
Gain on sale of property, plant and equipment (200) (6,647)
Acquisition costs 18,087 0
Deferred income taxes (1,997) (211)
Changes in operating assets and liabilities:    
Trade receivables, net (937) (39,531)
Unbilled receivables 3,973 (6,376)
Inventories (13,152) (4,758)
Prepaids and other assets (1,186) 1,335
Accounts payable and accrued expenses 124 (9,192)
Other, net (52) 0
Net cash used in operating activities (4,104) (52,920)
Cash flows from investing activities:    
Purchase of property, plant and equipment (4,757) (5,424)
Proceeds from sale of property, plant and equipment 375 15,460
Purchase of short-term investments 0 (9,081)
Maturities of short-term investments 21,892 22,392
Net cash provided by investing activities 17,510 23,347
Cash flows from financing activities:    
Other (297) (11)
Net cash used in financing activities (297) (11)
Effect of exchange rate changes on cash activities (2,209) 123
Increase (decrease) in cash and cash equivalents 10,900 (29,461)
Cash and cash equivalents at beginning of period 191,400 264,804
Cash and cash equivalents at end of period $ 202,300 $ 235,343