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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Cash flows from operating activities: |  |  |  |
Net loss before redeemable non-controlling interest |  | $ (255,593) | $ (362,953) | $ (122,949)
Adjustments to reconcile loss income to net cash used in operating activities: |  |  |  |
Depreciation and amortization |  | 33,310 | 33,413 | 36,034
Accretion of debt discount |  | 1,378 | 2,640 | 2,652
Stock-based compensation |  | 18,457 | 23,504 | 42,415
Loss on short-term investments |  | 0 | 6 | 3,146
Non-cash operating lease expense |  | 9,871 | 9,267 | 6,366
Provision for inventory obsolescence and revaluation |  | 12,360 | 6,350 | 2,586
Provision for bad debts |  | 506 | 595 | 562
Loss on the disposition of businesses, property, equipment and other assets |  | 2,795 | 6 | 104
Gain on debt extinguishment |  | (21,518) | (32,181) | 0
Benefit for deferred income taxes and reserve adjustments |  | (952) | (2,412) | (2,518)
Loss on equity method investment |  | 3,404 | 1,282 | 0
Impairments of assets |  | 144,967 | 304,698 | 4,095
Changes in operating accounts: |  |  |  |
Accounts receivable |  | (6,376) | (6,186) | 8,144
Inventories |  | 15,766 | (20,555) | (51,082)
Prepaid expenses and other current assets |  | 7,049 | (7,961) | 8,229
Accounts payable |  | (5,812) | (5,526) | (3,787)
Deferred revenue and customer deposits |  | 3,602 | 1,245 | (6,947)
Accrued and other liabilities |  | (6,187) | (12,933) | 10,702
All other operating activities |  | (1,914) | (12,994) | (7,773)
Net cash used in operating activities |  | (44,887) | (80,695) | (70,021)
Cash flows from investing activities: |  |  |  |
Purchases of property and equipment |  | (16,121) | (27,183) | (20,907)
Purchases of short-term investments |  | 0 | 0 | (384,388)
Sales and maturities of short-term investments |  | 0 | 180,925 | 200,314
Proceeds from sale of assets and businesses, net of cash sold |  | 96 | 194 | 325
Acquisitions and other investments, net of cash acquired |  | (3,000) | (29,152) | (103,699)
Net cash (used in) provided by investing activities |  | (19,025) | 124,784 | (308,355)
Cash flows from financing activities: |  |  |  |
Repayment of borrowings/long-term debt |  | (87,218) | (100,614) | 0
Purchase of non-controlling interests |  | 0 | 0 | (2,300)
Taxes paid related to net-share settlement of equity awards |  | (2,662) | (5,211) | (10,864)
Other financing activities |  | (1,385) | (644) | (651)
Net cash used in financing activities |  | (91,265) | (106,469) | (13,815)
Effect of exchange rate changes on cash, cash equivalents and restricted cash |  | (5,053) | 3,516 | (5,804)
Net decrease in cash, cash equivalents and restricted cash |  | (160,230) | (58,864) | (397,995)
Cash, cash equivalents and restricted cash at the beginning of the year | [1] | 333,111 | 391,975 | 789,970
Cash, cash equivalents and restricted cash at the end of the year | [1] | 172,881 | 333,111 | 391,975
Supplemental cash flow information |  |  |  |
Lease assets obtained in exchange for new lease liabilities |  | 6,678 | 38,037 | 6,037
Cash interest payments |  | 1,017 | 478 | 196
Cash income tax payments, net |  | 5,540 | 3,898 | 5,330
Transfer of equipment from inventory to property and equipment, net | [2] | 1,992 | 2,098 | (2,004)
Stock issued for acquisition |  | 0 | 0 | 7,091
Exchange of NAMI trade receivables for loan receivable | [3] | $ 1,960 | $ 0 | $ 0
[1] | The following table provides a reconciliation of cash, cash equivalents, and restricted cash reported within the consolidated balance sheets to the total of such amounts reported in the consolidated statements of cash flows.
| December 31, 2024 |  | December 31, 2023 |  |  |  | December 31, 2022
Cash and cash equivalents | $ | 171,324 |  |  | $ | 331,525 |  |  |  |  | $ | 388,134 |
Restricted cash included in prepaid expenses and other current assets | 123 |  |  | 119 |  |  |  |  | 114 |
Restricted cash included in other assets | 1,434 |  |  | 1,467 |  |  |  |  | 3,727 |
Total cash, cash equivalents and restricted cash shown in the consolidated statements of cash flows | $ | 172,881 |  |  | $ | 333,111 |  |  |  |  | $ | 391,975 |
Amounts included in restricted cash as of December 31, 2024 and December 31, 2023 primarily relate to guarantees in the form of a standby letter of credit as security for a long-term real estate lease. Refer to Note 22 for further information. Amounts included in restricted cash as of December 31, 2022 primarily relate to $3,435 deposited into and held in an escrow account prior to its use as part of our initial investment in the National Additive Manufacturing Innovation ("NAMI") joint venture. Refer to Note 10 for further information. The remaining amounts in restricted cash as of all periods presented relate to collateral for letters of credit and bank guarantees.
[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.
[3] | The Company provided $2.0 million to the NAMI joint venture as a short-term loan to finance its working capital and capital expenditures requirements, which was used by the joint venture to pay outstanding trade receivables due to the Company. Refer to Note 10 for further information.

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