Note 4 - Earnings Per Share (Details)	3 Months Ended	9 Months Ended		3 Months Ended		6 Months Ended
	Sep. 30, 2013 January Sixteen Two Thousand And Thirteen Plan [Member]	Sep. 30, 2013 January Sixteen Two Thousand And Thirteen Plan [Member]	Jan. 16, 2013 January Sixteen Two Thousand And Thirteen Plan [Member]	Sep. 30, 2013 August Twenty One Two Thousand And Thirteen Plan [Member]	Aug. 21, 2013 August Twenty One Two Thousand And Thirteen Plan [Member]	Jun. 30, 2014 March Twenty Two Thousand and Fourteen Plan [Member]	Mar. 20, 2014 March Twenty Two Thousand and Fourteen Plan [Member]
Note 4 - Earnings Per Share (Details) [Line Items]
Stock Repurchase Program, Number of Shares Authorized to be Repurchased			1,000,000		1,000,000		700,000
Purchase Of Common Stock Percentage On Outstanding Shares			6.00%		7.00%		5.00%
Stock Repurchased and Retired During Period, Shares	17,827	1,000,000		513,668		700,000