Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Cash flows from operating activities:
Net income	$ 3,156	$ 2,594
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion and amortization	4,398	4,109
Deferred income taxes	3,992	(1,581)
Equity in loss of joint ventures	1,577	272
Loss on sale of equipment and property	17	89
Stock-based compensation	555	475
Net changes in operating assets and liabilities:
Accounts receivable	(79)	(317)
Deferred costs and other assets	738	280
Accounts payable and accrued liabilities	(1,460)	2,681
Income taxes payable and receivable	(3,813)	(764)
Other long-term liabilities	(95)	14
Net cash provided by operating activities	8,986	7,852
Cash flows from investing activities:
Investments in properties	(8,139)	(2,430)
Investments in joint ventures	(236)	(347)
Cash held in escrow	0	1,174
Proceeds from sale of assets	0	2,166
Net cash (used in) provided by investing activities	(8,375)	563
Cash flows from financing activities:
Decrease in bank overdrafts	(83)	(69)
Repayment of long-term debt	(2,173)	(2,090)
Proceeds from borrowing on revolving credit facility	10,783	3,893
Payment on revolving credit facility	(11,093)	(6,821)
Repurchase of Company Stock	(74)	(43)
Exercise of employee stock options	2,029	184
Net cash used in financing activities	(611)	(4,946)
Net increase in cash and cash equivalents	0	3,469
Cash and cash equivalents at beginning of period	0	0
Cash and cash equivalents at end of the period	$ 0	$ 3,469