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Note 1 - Presentation of Interim Information (Detail) (USD $) | 3 Months Ended | 6 Months Ended | 1 Months Ended |  |  | 6 Months Ended | 3 Months Ended
--- | --- | --- | --- | --- | --- | --- | ---
Feb. 28, 2013 | Aug. 31, 2012 | Feb. 29, 2012 | Feb. 28, 2013 | Feb. 29, 2012 | Mar. 31, 2013 Subsequent Event [Member] | Feb. 28, 2013 County Tap And Construction Fee Deferred Revenue [Member] | Aug. 31, 2011 Deferred O And G Lease Revenue [Member] | Feb. 29, 2012 Common Share Equivalents [Member] | Feb. 28, 2013 Tap Fees [Member] | Feb. 29, 2012 Tap Fees [Member]
Unrealized Gain on Securities | $ 56 |  |  | $ 56 |  |  |  |  |  |  |
Unrealized Loss on Securities |  | 1,081 |  |  |  |  |  |  |  |  |
Increase (Decrease) in Notes Payable, Current | 5,800,000 |  |  | 5,800,000 |  | 385,100 |  |  |  |  |
Notes Payable | 9,600,000 |  |  | 9,600,000 |  |  |  |  |  |  |
Repayments of Notes Payable |  |  |  | 806,097 |  | 887,400 |  |  |  |  |
Note Payable Term |  |  |  |  |  | 5 years |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  | 5.00% |  |  |  |  |
Interest Expense, Other | 650,107 |  | 862,400 | 1,544,755 | 1,713,800 |  |  |  |  | 650,100 | 862,400
Recognition Of Deferred Water Tap Fees | 3,574 |  | 3,574 | 7,147 | 7,148 |  |  |  |  |  |
Recognition Of Deferred Construction Funding | 10,377 |  | 10,377 | 20,754 | 20,754 |  |  |  |  |  |
Deferred Revenue |  |  |  |  |  |  | 1,300,000 | 1,243,400 |  |  |
Allowance for Doubtful Accounts Receivable, Current | 41,000 | 20,000 |  | 41,000 |  |  |  |  |  |  |
Royalty Revenue | 103,600 |  | 103,600 | 207,200 | 207,200 |  |  |  |  |  |
Deferred Revenue, Leases, Net | 431,800 |  |  | 431,800 |  |  |  |  |  |  |
Share-based Compensation | $ 12,500 |  | $ 21,400 | $ 23,050 | $ 40,115 |  |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in Shares) |  |  |  | 247,600 |  |  |  |  | 275,100 |  |

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- Definition The amount of previously reported deferred or unearned revenue related to construction funding that was recognized as revenue during the period. For cash flows, this element primarily pertains to amortization of deferred credits on long-term arrangements. As a noncash item, it is deducted from net income when calculating cash provided by or used in operations using the indirect method. + References No definition available. + Details
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