CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Operating activities:
Net earnings	$ 212	$ 3,487	$ 11,888
Adjustments to reconcile net earnings to net cash provided by (used in) operating activities:
Depreciation and amortization	27,863	22,707	19,797
Gains on sales of property	(4,036)	(2,512)	(733)
Provision for doubtful accounts	29	(20)	(6)
Stock-based compensation expense	1,193	1,022	854
Change in contingent consideration liability	(2,566)	0	0
Deferred income taxes	(2,416)	(2,136)	(1,401)
Net change in fair value contracts	(330)	353	(14)
Changes in assets and liabilities:
Accounts receivable	24,715	(46,577)	(37,984)
Accounts receivable/payable, affiliates	(31)	33	(2)
Inventories	7,092	(7,334)	394
Income tax receivable	0	6,424	6,864
Prepayments and other current assets	15	(592)	575
Accounts payable	(21,270)	34,762	82,170
Accrued liabilities	(415)	4,327	(692)
Other	220	(167)	(684)
Net cash provided by operating activities	30,275	13,777	81,026
Investing activities:
Property and equipment additions	(11,897)	(7,491)	(12,382)
Acquisition of Firebird and Phoenix, net of cash acquired	0	(33,147)	0
Proceeds from property sales	8,785	3,102	2,286
Insurance and state collateral refunds	0	1,533	0
Net cash used in investing activities	(3,112)	(36,003)	(10,096)
Financing activities:
Borrowings under Credit Agreement	76,000	117,000	8,000
Repayments under Credit Agreement	(78,500)	(92,625)	(8,000)
Principal repayments of finance lease obligations	(8,516)	(4,741)	(4,367)
Cash paid for debt issuance costs	0	(1,679)	0
Payment for financed portion of VEX acquisition	0	0	(10,000)
Repurchase of common shares from KSA	0	(69,928)	0
Net proceeds from sale of equity	549	1,724	2,830
Dividends paid on common stock	(2,517)	(3,775)	(4,141)
Net cash used in financing activities	(12,984)	(54,024)	(15,678)
Increase (Decrease) in cash and cash equivalents, including restricted cash	14,179	(76,250)	55,252
Cash and cash equivalents, including restricted cash, at beginning of period	31,067	107,317	52,065
Cash and cash equivalents, including restricted cash, at end of period	$ 45,246	$ 31,067	$ 107,317