Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Cash flows from operating activities:
Net income	$ 4,155us-gaap_ProfitLoss	$ 4,044us-gaap_ProfitLoss
Adjustments to reconcile net income to net cash provided by operating activities:
Income from discontinued operations, net	(2,179)	(1,566)
Depreciation, depletion and amortization	3,851	3,384
Deferred income taxes	1,583us-gaap_DeferredIncomeTaxExpenseBenefit	372us-gaap_DeferredIncomeTaxExpenseBenefit
Equity in loss of joint ventures	180	63
Loss (Gain) on sale of equipment and property	120	(74)
Stock-based compensation	754	960
Net changes in operating assets and liabilities:
Accounts receivable	146	1,516
Deferred costs and other assets	(180)	(102)
Accounts payable and accrued liabilities	(2,828)	(2,139)
Income taxes payable and receivable	(2,348)	(1,379)
Other long-term liabilities	33	50
Net cash provided by operating activities of continuing operations	3,287	5,129
Net cash provided by operating activities of discontinued operations	4,984	3,655
Net cash provided by operating activities	8,271	8,784
Cash flows from investing activities:
Investments in property, plant and equipment	(2,429)	(4,797)
Cash held in escrow	35	1,349
Investment in joint ventures	(311)	(210)
Proceeds from the sale of real estate held for investment, property, plant and equipment	0	78
Net cash used in investing activities of continuing operations	(2,705)	(3,580)
Net cash used in investing activities of discontinued operations	(2,694)	(15,346)
Net cash used in investing activities	(5,399)	(18,926)
Cash flows from financing activities:
Repayment of long-term debt	(3,409)us-gaap_RepaymentsOfLongTermDebt	(2,120)us-gaap_RepaymentsOfLongTermDebt
Proceeds from borrowing on revolving credit facility	15,123us-gaap_ProceedsFromLinesOfCredit	0us-gaap_ProceedsFromLinesOfCredit
Payment on revolving credit facility	(14,182)us-gaap_RepaymentsOfLinesOfCredit	0us-gaap_RepaymentsOfLinesOfCredit
Excess tax benefits from exercises of stock options	730	539
Exercise of employee stock options	175	669
Net cash used in financing activities of continuing operations	(1,563)	(912)
Net cash (used in) provided by financing activities of discontinued operations	(1,631)	11,684
Net cash (used in) provided by financing activities	(3,194)	10,772
Net (decrease) increase in cash and cash equivalents	(322)	630
Cash and cash equivalents at beginning of period	1,013us-gaap_Cash	502us-gaap_Cash
Cash and cash equivalents at end of the period	$ 691us-gaap_Cash	$ 1,132us-gaap_Cash

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