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Note 11 - Capital Stock (Detail) (USD $)	3 Months Ended
Note 11 - Capital Stock (Detail) (USD $)	Mar. 31, 2013	Sep. 30, 2012	Jul. 23, 2012
Stock Repurchase Program, Number of Shares Authorized to be Repurchased			850,000
Percent of Oustanding Stock			5.00%
Stock Repurchased During Period, Shares	94,015
Treasury Stock Acquired, Average Cost Per Share (in Dollars per share)	$ 25.59
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased		479,685
Prior to New Stock Repurchase Program [Member]
Stock Repurchase Program, Number of Shares Authorized to be Repurchased			700,000

Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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