CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Operating activities
Net loss	$ (31,246)	$ (36,058)
Adjustments to reconcile net loss to net cash (used in) from operating activities:
Depreciation, depletion and amortization	14,721	15,661
Provision for inventory obsolescence	882	786
Restructuring expenses	3,355	314
Stock-based compensation expense	758	1,625
Non-cash operating lease expense	3,923	4,375
Non-cash loss from asset disposition	0	11,103
Other	1,400	323
Changes in assets and liabilities:
Accounts receivable	(140)	(1,986)
Inventories	2,878	8,608
Prepaid expenses and other current assets	177	1,781
Other assets	(182)	(234)
Accounts payable	134	739
Accrued expenses and other current liabilities	(2,259)	263
Deferred revenue	(527)	(496)
Lease liabilities	(3,851)	(5,315)
Other long-term liabilities	(70)	(2)
Net cash (used in) from operating activities	(10,047)	1,487
Investing activities
Capital expenditures of property, plant and equipment	(525)	(1,810)
Cash proceeds from IGE Asset Sale for property, plant and equipment	0	3,700
Other	24	390
Net cash (used in) from investing activities	(501)	2,280
Financing activities
Borrowings under foreign revolving credit facilities	210	251
Repayments of foreign revolving credit facilities	(225)	(296)
Repayments of Term Loan	(4,851)	(2,282)
Payment of withholding tax related to stock awards	(27)	(98)
Finance lease principal payments	(228)	(1,151)
Net cash used in financing activities	(5,121)	(3,576)
Effect of exchange rate changes on cash and cash equivalents	549	(189)
Net (decrease) increase in cash and cash equivalents	(15,120)	2
Cash and cash equivalents at beginning of period	26,111	30,312
Cash and cash equivalents at end of period	10,991	30,314
Non-cash investing and financing activities
Right-of-use assets acquired (relinquished) under operating lease obligations, net	2,166	(1,924)
Capital expenditures included in accounts payable and accrued liabilities	131	719
Supplemental information
Cash paid for interest	6,920	8,560
Cash paid for income taxes	$ 343	$ 68