UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Operating activities:
Net (losses) earnings	$ (7,924)	$ 4,914
Adjustments to reconcile net losses earnings to net cash provided by (used in) operating activities:
Depreciation and amortization	8,751	7,873
Gains on sales of property	(140)	(434)
Provision for doubtful accounts	(24)	(36)
Stock-based compensation expense	304	197
Deferred income taxes	(1,534)	1,012
Net change in fair value contracts	(12)	19
Gain on dissolution of AREC	0	(573)
Changes in assets and liabilities:
Accounts receivable	27,103	11,812
Accounts receivable/payable, affiliates	1	(23)
Inventories	6,570	2,802
Income tax receivable	(4,733)	187
Prepayments and other current assets	262	(271)
Accounts payable	(63,013)	1,505
Accrued liabilities	3,875	3,765
Other	55	999
Net cash provided by (used in) operating activities	(30,459)	33,748
Investing activities:
Property and equipment additions	(2,880)	(13,121)
Asset acquisition	(9,137)	(5,611)
Proceeds from property sales	514	1,287
Proceeds from dissolution of AREC	0	998
Insurance and state collateral (deposits) refunds	1,129	774
Net cash used in investing activities	(10,374)	(15,673)
Financing activities:
Principal repayments of finance lease obligations	(1,070)	(651)
Payment of contingent consideration liability	(111)	0
Dividends paid on common stock	(2,044)	(1,944)
Net cash used in financing activities	(3,225)	(2,595)
(Decrease) Increase in cash and cash equivalents, including restricted cash	(44,058)	15,480
Cash and cash equivalents, including restricted cash, at beginning of period	122,255	117,066
Cash and cash equivalents, including restricted cash, at end of period	$ 78,197	$ 132,546