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Note 5 - Derivative Financial Instruments (Detail) (USD $) | 3 Months Ended | 15 Months Ended | 28 Months Ended
--- | --- | --- | ---
Mar. 31, 2013 | Mar. 31, 2013 l | Aug. 31, 2015 gal
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax, Portion Attributable to Parent (in Dollars) | $ 51,000 |  |
Unrealized Gain on Price Risk Cash Flow Derivatives, before Tax (in Dollars) | 18,000 |  |
Price Risk Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net (in Dollars) |  | $ 26,000 |
Derivative, Nonmonetary Notional Amount, Gallons (in Liters) |  | 965,000 | 1,200,000
Derivative, Nonmonetary Notional Amount, Price Per Gallon (in Dollars per US Gallon) |  |  | 2.75
Derivative, Nonmonetary Notional Amount, Gallons |  | 965,000 | 1,200,000
Derivative, Nonmonetary Notional Amount, Price Per Gallon (in Dollars per Item) |  |  | 2.75
Minimum [Member] |  |  |
Derivative, Nonmonetary, Number of Gallons Range |  | 10,000 |
Derivative, Nonmonetary Notional Amount, Price Per Gallon (in Dollars per US Gallon) | 2.79 | 2.79 |
Derivative, Nonmonetary Notional Amount, Price Per Gallon (in Dollars per Item) | 2.79 | 2.79 |
Maximum [Member] |  |  |
Derivative, Nonmonetary, Number of Gallons Range |  | 20,000 |
Derivative, Nonmonetary Notional Amount, Price Per Gallon (in Dollars per US Gallon) | 3.24 | 3.24 |
Derivative, Nonmonetary Notional Amount, Price Per Gallon (in Dollars per Item) | 3.24 | 3.24 |

X
- Definition The number of gallons in a derivative contract expressed in nonmonetary units. For example, the number of gallons specified in a fuel forward purchase contract. + References No definition available. + Details
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X
- Definition The range in gallons of the derivative contract nonmonetary units. For example, volume in gallons specified in a fuel forward purchase contract. + References No definition available. + Details
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X
- Definition The price per gallon of the notional amount of the derivative contract expressed in nonmonetary units. For example, the price per gallon specified in a fuel forward purchase contract. + References No definition available. + Details
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X
- Definition Amount of tax effect, net of reclassification adjustments, on the result from the process of expressing in the reporting currency of the reporting entity those amounts that are denominated or measured in a different currency, attributable to the parent entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4569616-111683 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 29 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph c(3) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=18733093&loc=SL4573702-111684 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 30 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4569643-111683 + Details
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X
- Definition The amount of net gains or losses on price risk cash flow hedges reclassified during the period to earnings from accumulated other comprehensive income. + References No definition available. + Details
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X
- Definition Amount of unrealized gain from the increase in fair value of price risk derivatives designated as cash flow hedging instruments recorded in accumulated other comprehensive income in the period, before taxes, to the extent that the cash flow hedge is determined to be effective. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 30, 46 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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