UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Operating activities:
Net (losses) earnings	$ 6,793	$ (4,175)
Adjustments to reconcile net (losses) earnings to net cash provided by operating activities:
Depreciation, depletion and amortization	7,014	10,772
Gains on sales of property	(890)	(347)
Impairment of oil and natural gas properties	0	3
Provision for doubtful accounts	(95)	(9)
Stock-based compensation expense	144	0
Deferred income taxes	(685)	(1,198)
Net change in fair value contracts	5	48
Impairment of investment in unconsolidated affiliate	0	2,500
Loss on deconsolidation of subsidiary	0	3,505
Changes in assets and liabilities:
Accounts receivable	12,830	5,228
Accounts receivable/payable, affiliates	1	266
Inventories	(22,568)	(9,328)
Income tax receivable	1,317	(1,412)
Prepayments and other current assets	(7)	927
Accounts payable	22,254	9,482
Accrued liabilities	3,815	465
Other	(103)	(240)
Net cash provided by operating activities	29,825	16,487
Investing activities:
Property and equipment additions	(7,756)	(2,465)
Proceeds from property sales	1,314	430
Insurance and state collateral (deposits) refunds	1,070	439
Net cash used in investing activities	(5,372)	(1,596)
Financing activities:
Principal repayments of capital lease obligations	(288)	0
Dividends paid on common stock	(2,784)	(2,784)
Net cash used in financing activities	(3,072)	(2,784)
Increase in cash and cash equivalents	21,381	12,107
Cash and cash equivalents at beginning of period	109,393	87,342
Cash and cash equivalents at end of period	$ 130,774	$ 99,449