UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Operating activities:
Net earnings (losses)	$ 2,808	$ (11,427)
Adjustments to reconcile net losses earnings to net cash provided by (used in) operating activities:
Depreciation and amortization	5,053	4,473
Gains on sales of property	(83)	(140)
Provision for doubtful accounts	(1)	(24)
Stock-based compensation expense	185	134
Deferred income taxes	(829)	(2,689)
Net change in fair value contracts	(21)	(19)
Changes in assets and liabilities:
Accounts receivable	(11,268)	41,617
Accounts receivable/payable, affiliates	(13)	1
Inventories	(9,887)	16,386
Income tax receivable	1,650	(5,530)
Prepayments and other current assets	(657)	253
Accounts payable	36,127	(68,384)
Accrued liabilities	51	1,506
Other	(114)	(3)
Net cash provided by (used in) operating activities	23,001	(23,846)
Investing activities:
Property and equipment additions	(170)	(2,212)
Proceeds from property sales	1,005	502
Insurance and state collateral (deposits) refunds	0	1,128
Net cash provided by (used in) investing activities	835	(582)
Financing activities:
Principal repayments of finance lease obligations	(1,014)	(532)
Payment for financed portion of VEX acquisition	(2,500)	0
Payment of contingent consideration liability	0	(54)
Dividends paid on common stock	(1,025)	(1,016)
Net cash used in financing activities	(4,539)	(1,602)
Increase (Decrease) in cash and cash equivalents, including restricted cash	19,297	(26,030)
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	$ 71,362	$ 96,225