CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Operating activities
Net loss	$ (36,058)	$ (29,714)
Adjustments to reconcile net loss to net cash from operating activities:
Depreciation, depletion and amortization	15,661	16,257
Provision for inventory obsolescence	786	964
Restructuring expenses	314	744
Stock-based compensation expense	1,625	2,999
Non-cash operating lease expense	4,375	5,407
Non-cash loss from asset disposition	11,103	0
Other	323	753
Changes in assets and liabilities:
Accounts receivable	(1,986)	(897)
Inventories	8,608	15,437
Prepaid expenses and other current assets	1,781	(406)
Other assets	(234)	(188)
Accounts payable	739	(1,209)
Accrued expenses and other current liabilities	263	(3,261)
Deferred revenue	(496)	(1,323)
Lease liabilities	(5,315)	(4,548)
Other long-term liabilities	(2)	(54)
Net cash from operating activities	1,487	961
Investing activities
Capital expenditures of property, plant and equipment	(1,810)	(3,306)
Cash proceeds from Asset Sale for property, plant and equipment	3,700	0
Other	390	43
Net cash from (used in) investing activities	2,280	(3,263)
Financing activities
Proceeds from Sale-Leaseback Transaction	0	8,598
Borrowings under foreign revolving credit facilities	251	483
Repayments of foreign revolving credit facilities	(296)	(351)
Repayments of Term Loan	(2,282)	(625)
Payment of withholding tax related to stock awards	(98)	(148)
Finance lease principal payments	(1,151)	(510)
Net cash (used in) from financing activities	(3,576)	7,447
Effect of exchange rate changes on cash and cash equivalents	(189)	246
Net increase in cash and cash equivalents	2	5,391
Cash and cash equivalents at beginning of period	30,312	21,291
Cash and cash equivalents at end of period	30,314	26,682
Non-cash investing and financing activities
Right-of-use assets relinquished under operating lease obligations, net	(1,924)	(748)
Assets acquired under finance lease obligations	0	185
Capital expenditures included in accounts payable and accrued liabilities	719	517
Supplemental information
Cash paid for interest	8,560	6,884
Cash paid for income taxes	$ 68	$ 659