Note 8 - Summary of Repurchases of Common Stock (Details) - USD ($)	1 Months Ended							3 Months Ended				6 Months Ended
	Dec. 31, 2015		Nov. 30, 2015		Aug. 31, 2015		Jul. 31, 2015	Dec. 31, 2015		Sep. 30, 2015		Dec. 31, 2015
Publicly Announced Share Repurchase Program [Member]
Total Number of Shares Purchased (in shares)	464,257	[1]	1,631,119	[1]	2,562,065	[1]		2,095,376	[1]	2,652,065	[1]	4,747,441	[1]
Total Number of Shares Purchased (in shares)	464,257		1,631,119		2,562,065			2,095,376		2,652,065		4,747,441
Average Price Paid Per Share (in dollars per share)	$ 12.83		$ 11.64		$ 9.40			$ 11.91		$ 9.40		$ 10.51
Maximum Approximate Dollar Value of Shares That May Yet Be Purchased Under the Program	$ 25,000,000				$ 50,000,000			$ 25,000,000		$ 50,000,000		$ 25,000,000
Value of Shares Repurchased	$ 6,000,000		$ 19,000,000

[1] Represents shares repurchased through the Company's Share Repurchase Program publicly announced in August 2015.