Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash flows from operating activities:
Net income	$ 1,443	$ 1,820
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion and amortization	2,136	1,998
Deferred income taxes	3,092	(599)
Equity in loss of joint ventures	771	86
Gain on sale of equipment and property	0	(1)
Stock-based compensation	522	443
Net changes in operating assets and liabilities:
Accounts receivable	124	(242)
Deferred costs and other assets	559	228
Accounts payable and accrued liabilities	(225)	(227)
Income taxes payable and receivable	(3,495)	(251)
Other long-term liabilities	(45)	34
Net cash provided by operating activities	4,882	3,289
Cash flows from investing activities:
Investments in properties	(3,729)	(956)
Investments in joint ventures	(104)	(145)
Cash held in escrow	0	(1)
Net cash used in investing activities	(3,833)	(1,102)
Cash flows from financing activities:
Increase (decrease) in bank overdrafts	(254)	549
Repayment of long-term debt	(1,096)	(1,036)
Proceeds from borrowing on revolving credit facility	6,007	3,222
Payment on revolving credit facility	(5,907)	(5,106)
Repurchase of Company Stock	(74)	0
Exercise of employee stock options	381	184
Net cash used in financing activities	(943)	(2,187)
Net increase in cash and cash equivalents	106	0
Cash and cash equivalents at beginning of period	0	0
Cash and cash equivalents at end of the period	$ 106	$ 0