Condensed Consolidated Statements of Income (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
Nov. 30, 2014	Nov. 30, 2013
Revenues	$ 33,234us-gaap_Revenues	$ 31,035us-gaap_Revenues
Cost of revenues	24,429us-gaap_CostOfRevenue	22,129us-gaap_CostOfRevenue
Gross margin	8,805us-gaap_GrossProfit	8,906us-gaap_GrossProfit
Operating expenses:
Selling, general and administrative expenses	8,114	7,779
Income from operations	691us-gaap_OperatingIncomeLoss	1,127us-gaap_OperatingIncomeLoss
Other (expense) income:
Net (loss) gain on trading securities	(43)	91
Gain on sale of property	0	535
Interest expense, net	0us-gaap_InterestExpense	(99)us-gaap_InterestExpense
Total other (expense) income, net	(43)us-gaap_NonoperatingIncomeExpense	527us-gaap_NonoperatingIncomeExpense
Income from operations before income taxes	648	1,654
Provision for income taxes	253us-gaap_IncomeTaxExpenseBenefit	590us-gaap_IncomeTaxExpenseBenefit
Net income	395us-gaap_NetIncomeLoss	1,064us-gaap_NetIncomeLoss
Cumulative preferred stock dividend	(19)	(19)
Net income attributable to common shareholders	$ 376	$ 1,045
Basic and diluted earnings per share
Net income per share attributable to common shareholders (in dollars per share)	$ 0.08us-gaap_EarningsPerShareBasicAndDiluted	$ 0.21us-gaap_EarningsPerShareBasicAndDiluted
Basic and diluted weighted average common shares outstanding (in shares)	4,861,590	4,861,590

The aggregate cost of goods produced and sold and services rendered during the reporting period.

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Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period).

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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Average number of shares or units issued and outstanding that are used in calculating basic and diluted earnings per share (EPS).

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