Note 10 - Redeemable Preferred Stock (Details Textual) - USD ($) $ / shares in Units, $ in Thousands					3 Months Ended	9 Months Ended
	Aug. 18, 2015	Aug. 15, 2015	Jul. 02, 2015	Mar. 25, 2015	Dec. 31, 2014	Sep. 30, 2015	Sep. 30, 2014	Aug. 19, 2015
Redeemable Preferred Stock [Member]
Temporary Equity, Shares Outstanding					60,600
Stock Issued During Period, Shares, New Issues					7,500		46,500
Preferred Stock [Member]
Temporary Equity, Redemption Price Per Share			$ 100
Stock Repurchased During Period, Shares			29,550
Stock Repurchased During Period, Percent			49.00%
Payments of Dividends	$ 6,300	$ 6,300
Stock Issued During Period, Shares, New Issues							66,000
Private Placement [Member]
Stock Issued During Period, Shares, New Issues	294,450
Proceeds from Issuance of Common Stock	$ 3,100
Preferred Stock, Shares Outstanding					60,000	0	66,000	0
Redeemable Preferred Stock, Liquidation Event					50.00%
Holders of the Preferred Stock, Liquidation Event, Percentage				80.00%
Redeemable Preferred Stock, Term				1 year
Proceeds from Issuance of Common Stock						$ 36,066	$ 16,045