UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Operating activities:
Net earnings (losses)	$ 7,517	$ (7,924)
Adjustments to reconcile net losses earnings to net cash provided by (used in) operating activities:
Depreciation and amortization	9,854	8,751
Gains on sales of property	(265)	(140)
Provision for doubtful accounts	(2)	(24)
Stock-based compensation expense	417	304
Deferred income taxes	(1,636)	(1,534)
Net change in fair value contracts	(25)	(12)
Changes in assets and liabilities:
Accounts receivable	(26,109)	27,103
Accounts receivable/payable, affiliates	(4)	1
Inventories	(10,376)	6,570
Income tax receivable	7,442	(4,733)
Prepayments and other current assets	842	262
Accounts payable	63,831	(63,013)
Accrued liabilities	1,235	3,875
Other	(614)	55
Net cash provided by (used in) operating activities	52,107	(30,459)
Investing activities:
Property and equipment additions	(3,602)	(2,880)
Asset acquisition	0	(9,137)
Proceeds from property sales	1,316	514
Insurance and state collateral (deposits) refunds	0	1,129
Net cash used in investing activities	(2,286)	(10,374)
Financing activities:
Borrowings under Credit Agreement	8,000	0
Principal repayments of finance lease obligations	(2,123)	(1,070)
Payment for financed portion of VEX acquisition	(10,000)	0
Payment of contingent consideration liability	0	(111)
Dividends paid on common stock	(2,062)	(2,044)
Net cash used in financing activities	(6,185)	(3,225)
Increase (Decrease) in cash and cash equivalents, including restricted cash	43,636	(44,058)
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	$ 95,701	$ 78,197