UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Operating activities:
Net earnings (losses)	$ 9,063	$ (4,851)
Adjustments to reconcile net losses earnings to net cash provided by (used in) operating activities:
Depreciation and amortization	14,703	13,610
Gains on sales of property	(532)	(985)
Provision for doubtful accounts	(3)	(27)
Stock-based compensation expense	641	453
Deferred income taxes	(1,664)	(1,503)
Net change in fair value contracts	(32)	(3)
Changes in assets and liabilities:
Accounts receivable	(30,367)	(93)
Accounts receivable/payable, affiliates	(5)	153
Inventories	(5,026)	10,465
Income tax receivable	7,099	(1,782)
Prepayments and other current assets	1,455	142
Accounts payable	68,766	(70,082)
Accrued liabilities	770	4,396
Other	(636)	17
Net cash provided by (used in) operating activities	64,232	(50,090)
Investing activities:
Property and equipment additions	(9,929)	(3,589)
Asset acquisition	0	(9,163)
Proceeds from property sales	1,886	2,282
Insurance and state collateral (deposits) refunds	0	1,127
Net cash used in investing activities	(8,043)	(9,343)
Financing activities:
Borrowings under Credit Agreement	8,000	0
Principal repayments of finance lease obligations	(3,240)	(1,677)
Payment for financed portion of VEX acquisition	(10,000)	0
Net proceeds from sale of equity	2,504	0
Payment of contingent consideration liability	0	(111)
Dividends paid on common stock	(3,096)	(3,063)
Net cash used in financing activities	(5,832)	(4,851)
Increase (Decrease) in cash and cash equivalents, including restricted cash	50,357	(64,284)
Cash and cash equivalents, including restricted cash, at beginning of period	52,065	122,255
Cash and cash equivalents, including restricted cash, at end of period	$ 102,422	$ 57,971