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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
OPERATING ACTIVITIES      
Net income (loss) before redeemable non-controlling interest $ 29,883 $ (255,593) $ (362,953)
Adjustments to reconcile income (loss) to net cash used in operating activities:      
Depreciation and amortization 21,511 33,310 33,413
Accretion of debt discount 1,463 1,378 2,640
Stock-based compensation 9,525 18,457 23,504
Loss on short-term investments 0 0 6
Non-cash operating lease expense 9,974 9,871 9,267
Provision for inventory obsolescence and revaluation 8,201 12,360 6,350
Provision for bad debts 1,810 506 595
(Gain) loss on the disposition of businesses, property, equipment and other assets (138,569) 2,795 6
Gain on debt extinguishment (5,484) (21,518) (32,181)
Benefit for deferred income taxes and reserve adjustments (685) (952) (2,412)
Loss on equity method investment 4,838 3,404 1,282
Asset impairment charges 760 144,967 304,698
Changes in operating accounts:      
Accounts receivable 18,423 (6,376) (6,186)
Inventories (14,440) 15,766 (20,555)
Prepaid expenses and other current assets 698 7,049 (7,961)
Accounts payable (3,472) (5,812) (5,526)
Deferred revenue and customer deposits (8,421) 3,602 1,245
Accrued and other liabilities (4,518) (6,187) (12,933)
All other operating activities (19,325) (1,914) (12,994)
Net cash used in operating activities (87,828) (44,887) (80,695)
INVESTING ACTIVITIES      
Purchases of property and equipment (9,944) (16,121) (27,183)
Sales and maturities of short-term investments 0 0 180,925
Proceeds from sale of assets and businesses, net of cash sold 122,681 96 194
Acquisitions and other investments, net of cash acquired (3,933) (3,000) (29,152)
Other investing activities 186 0 0
Net cash provided by (used in) investing activities 108,990 (19,025) 124,784
FINANCING ACTIVITIES      
Proceeds from borrowings 92,030 0 0
Debt issuance and amendment costs (6,132) 0 0
Repayment of borrowings and long-term debt (169,987) (87,218) (100,614)
Stock repurchases (14,960) 0 0
Taxes paid related to net-share settlement of equity awards (1,025) (2,662) (5,211)
Other financing activities (1,593) (1,385) (644)
Net cash used in financing activities (101,667) (91,265) (106,469)
Effect of exchange rate changes on cash, cash equivalents and restricted cash 4,724 (5,053) 3,516
Net decrease in cash, cash equivalents and restricted cash (75,781) (160,230) (58,864)
Cash, cash equivalents and restricted cash at the beginning of the year 172,881 333,111 391,975
Cash, cash equivalents and restricted cash at the end of the year 97,100 172,881 333,111
Balances per Consolidated Balance Sheets:      
Cash and cash equivalents 95,635 171,324 331,525
Restricted cash included in prepaid expenses and other current assets 126 123 119
Restricted cash included in other assets [1] 1,339 1,434 1,467
Total cash, cash equivalents and restricted cash 97,100 172,881 333,111
Supplemental cash flow information      
Lease assets obtained in exchange for new lease liabilities 3,483 6,678 38,037
Cash interest payments 3,538 1,017 478
Cash income tax payments, net 9,633 5,540 3,898
Transfer of equipment from inventory to property and equipment, net [2] 4,032 1,992 2,098
Exchange of NAMI trade receivables for loan receivable [3] 0 1,960 0
Exchange of assets for investment 1,016 0 0
Conversion of debt to equity 30,773 0 0
Shares issued as debt issuance costs $ 1,328 $ 0 $ 0
[1] Amounts included in restricted cash as of December 31, 2025, December 31, 2024 and December 31, 2023 includes guarantees in the form of a standby letter of credit as security for a long-term real estate lease.
[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] During the year ended December 31, 2024, 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 9 for further information.