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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Cash flows from operating activities:      
Net (loss) income before redeemable non-controlling interest $ (362,953) $ (122,949) $ 322,052
Adjustments to reconcile net (loss) income to net cash (used in) provided by operating activities:      
Depreciation, amortization and accretion of debt discount 36,053 38,686 34,623
Stock-based compensation 23,504 42,415 55,153
Loss on short-term investments 6 3,146 0
Non-cash operating lease expense 9,267 6,366 5,681
Provision for inventory obsolescence and revaluation 6,350 2,586 (2,909)
Loss on hedge accounting de-designation and termination 0 0 721
Provision for bad debts 595 562 232
Loss (gain) on the disposition of businesses, property, equipment and other assets 6 104 (350,846)
Gain on debt extinguishment (32,181) 0 0
Benefit for deferred income taxes and reserve adjustments (2,412) (2,518) (11,679)
Loss on equity method investment 1,282 0 0
Impairments of assets 304,698 4,095 1,676
Changes in operating accounts:      
Accounts receivable (6,186) 8,144 (11,912)
Inventories (20,555) (51,082) 7,866
Prepaid expenses and other current assets (7,961) 8,229 (8,106)
Accounts payable (5,526) (3,787) 27,159
Deferred revenue and customer deposits 1,245 (6,947) (3,325)
Accrued and other liabilities (12,933) 10,702 (12,389)
All other operating activities (12,994) (7,773) (5,850)
Net cash (used in) provided by operating activities (80,695) (70,021) 48,147
Cash flows from investing activities:      
Purchases of property and equipment (27,183) (20,907) (18,791)
Purchases of short-term investments 0 (384,388) 0
Sales and maturities of short-term investments 180,925 200,314 0
Proceeds from sale of assets and businesses, net of cash sold 194 325 421,485
Acquisitions and other investments, net of cash acquired (29,152) (103,699) (139,685)
Other investing activities 0 0 (2,454)
Net cash provided by (used in) investing activities 124,784 (308,355) 260,555
Cash flows from financing activities:      
Proceeds from borrowings 0 0 460,000
Debt issuance costs 0 0 (13,466)
Repayment of borrowings/long-term debt (100,614) 0 (21,392)
Purchase of non-controlling interests 0 (2,300) (6,300)
Taxes paid related to net-share settlement of equity awards (5,211) (10,864) (12,619)
Other financing activities (644) (651) (423)
Net cash (used in) provided by financing activities (106,469) (13,815) 405,800
Effect of exchange rate changes on cash, cash equivalents and restricted cash 3,516 (5,804) (9,243)
Net (decrease) increase in cash, cash equivalents and restricted cash (58,864) (397,995) 705,259
Cash, cash equivalents and restricted cash at the beginning of the year [1] 391,975 789,970 84,711
Cash, cash equivalents and restricted cash at the end of the year [1] 333,111 391,975 789,970
Supplemental cash flow information      
Lease assets obtained in exchange for new lease liabilities 38,037 6,037 4,502
Cash interest payments 478 196 1,138
Cash income tax payments, net 3,898 5,330 4,709
Transfer of equipment from inventory to property and equipment, net [2] 2,098 (2,004) 1,738
Stock issued for acquisition $ 0 $ 7,091 $ 99,044
[1] The amounts for cash and cash equivalents shown above include restricted cash of $119, $114 and $313 as of December 31, 2023, 2022 and 2021, respectively, which are included in prepaid expenses and other current assets. In addition, included in cash and cash equivalents above as of December 31, 2023 and 2022 is $1,467 and $3,727 of restricted cash, which is included in other assets.
[2] Inventory is transferred to property and equipment at cost when we require additional machines for training or demonstration or for placement into on demand manufacturing services locations.