Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Operating activities:
Net income	$ 7,719	$ 109,047
Reconciliation of net income to net cash provided by operating activities:
Depreciation, amortization, and accretion	7,679	8,981
Gain on GP Sale	0	(120,574)
Gain on investments	(1,100)	(3,992)
Equity-based compensation expense	1,104	2,478
Provision for doubtful accounts	61	155
Amortization and expense of financing costs	780	728
Insurance recoveries associated with damaged equipment	(3,750)	(110)
Gain on sale of assets	(218)	(255)
Other non-cash charges	(101)	385
Changes in operating assets and liabilities:
Accounts receivable	(13,185)	1,501
Inventories	4,579	498
Prepaid expenses and other current assets	2,510	(1,060)
Trade accounts payable and accrued expenses	9	8,521
Other	(153)	(478)
Net cash provided by (used in) operating activities	5,934	5,825
Investing activities:
Purchases of property, plant, and equipment, net	9,305	6,761
Proceeds from GP Sale, net of cash divested	0	18
Proceeds from sale of property, plant, and equipment	416	561
Proceeds from insurance recoveries associated with damaged equipment	3,750	110
Other investing activities	(453)	1,771
Net cash used in investing activities	(5,592)	(4,301)
Financing activities:
Proceeds from long-term debt	1,533	160
Principal payments on long-term debt	(811)	(29,500)
Repurchase of common stock	0	(449)
Debt issuance costs and other financing activities	0	(98)
Net cash provided by (used in) financing activities	722	(29,887)
Effect of exchange rate changes on cash	236	(1,303)
Increase (decrease) in cash and cash equivalents	1,300	(29,666)
Cash and cash equivalents and restricted cash at beginning of period	31,551	83,894
Cash and cash equivalents at beginning of period associated with discontinued operations	0	16,577
Cash and cash equivalents and restricted cash at beginning of period associated with continuing operations	31,551	67,317
Cash and cash equivalents and restricted cash at end of period associated with continuing operations	$ 32,851	$ 54,228