UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Operating activities:
Net earnings	$ 4,914	$ 4,758
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	7,873	4,674
Gains on sales of property	(434)	(446)
Provision for doubtful accounts	(36)	(32)
Stock-based compensation expense	197	3
Deferred income taxes	1,012	(832)
Net change in fair value contracts	19	(3)
Gain on dissolution of AREC	(573)	0
Changes in assets and liabilities:
Accounts receivable	11,812	2,852
Accounts receivable/payable, affiliates	(23)	0
Inventories	2,802	(9,321)
Income tax receivable	187	1,317
Prepayments and other current assets	(271)	67
Accounts payable	1,505	15,634
Accrued liabilities	3,765	2,441
Other	999	125
Net cash provided by operating activities	33,748	21,237
Investing activities:
Property and equipment additions	(13,121)	(2,728)
Asset acquisition	(5,611)	0
Proceeds from property sales	1,287	655
Proceeds from dissolution of AREC	998	0
Insurance and state collateral (deposits) refunds	774	465
Net cash used in investing activities	(15,673)	(1,608)
Financing activities:
Principal repayments of finance lease obligations	(651)	(167)
Dividends paid on common stock	(1,944)	(1,856)
Net cash used in financing activities	(2,595)	(2,023)
Increase in cash and cash equivalents, including restricted cash	15,480	17,606
Cash and cash equivalents, including restricted cash, at beginning of period	117,066	109,393
Cash and cash equivalents, including restricted cash, at end of period	$ 132,546	$ 126,999