Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Operating activities:
Net income	$ 25,757	$ 7,796	$ 103,602
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization, and accretion	34,329	32,819	33,532
Gain on sale on disposal of discontinued operations	0	0	(120,137)
Impairments and other charges	2,966	2,804	581
Unrealized (gain) loss on investments	(539)	(180)	2,227
Realized gain on sale of Standard Lithium shares	0	0	(15,479)
Provisions for deferred income taxes	(734)	537	(71)
Equity-based compensation expense	10,622	6,880	4,664
Provision for (recovery of) credit losses	285	42	(654)
Amortization and expense of financing costs	3,433	3,376	3,091
Gain from insurance recoveries associated with damaged equipment	(2,850)	(3,750)	(110)
Gain on sale of assets	(562)	(1,170)	(482)
Other non-cash charges and credits	(1,231)	(482)	(624)
Changes in operating assets and liabilities, net of assets acquired:
Accounts receivable	20,165	(39,848)	(27,795)
Inventories	(23,205)	(4,471)	5,387
Prepaid expenses and other current assets	2,176	(4,546)	(6,533)
Trade accounts payable and accrued expenses	(128)	22,705	27,006
Other	(278)	(3,555)	(3,548)
Net cash provided by operating activities	70,206	18,957	4,657
Investing activities:
Purchases of property, plant, and equipment, net	(38,152)	(40,056)	(20,533)
Acquisition of businesses, net of cash acquired	0	(917)	0
Purchase of CarbonFree convertible note	(350)	0	(5,000)
Proceeds from sale of investment	3,900	0	17,627
Proceeds from sale of property, plant, and equipment	6,661	1,706	1,687
Proceeds from insurance recoveries associated with damaged equipment	2,850	3,750	110
Other investing activities	(1,936)	(987)	934
Net cash used in investing activities	(27,027)	(36,504)	(5,175)
Financing activities:
Proceeds from long-term debt	97,529	13,825	1,614
Principal payments on credit agreements and long-term debt	(100,497)	(12,483)	(50,477)
Financing cash flows - finance leases	(1,695)	(1,302)	0
Debt issuance costs and other financing activities	0	0	(1,191)
Net cash provided by (used in) financing activities	(4,663)	40	(50,054)
Effect of exchange rate changes on cash	377	(452)	(1,771)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect	38,893	(17,959)	(52,343)
Cash and cash equivalents at beginning of period	13,592	31,551	83,894
Cash and cash equivalents at beginning of period associated with discontinued operations	0	0	16,577
Cash and cash equivalents at beginning of period associated with continuing operations	$ 13,592	31,551	67,317
Cash and cash equivalents at end of period associated with discontinued operations		0	0
Cash and cash equivalents at end of period associated with continuing operations		$ 13,592	$ 31,551