Note 3 - Stockholders' Equity (Details) (USD $)	3 Months Ended	1 Months Ended
	Mar. 31, 2015	Mar. 31, 2015	Dec. 31, 2014
Note 3 - Stockholders' Equity (Details) [Line Items]
Proceeds from Issuance of Common Stock (in Dollars)	$ 167,528,000
Capital Units, Authorized	135,000,000	135,000,000
Common Stock, Shares Authorized	100,000,000	100,000,000	100,000,000
Common Stock, Voting Rights, Votes Per Share	1	1
Stock Repurchase Program, Number of Shares Authorized to be Repurchased	5,000,000	5,000,000
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased	279,200	279,200
Common Stock, Capital Shares Reserved for Future Issuance	6,965,301	6,965,301	7,116,171
Common Class A [Member]
Note 3 - Stockholders' Equity (Details) [Line Items]
Common Stock, Shares Authorized	15,000,000	15,000,000	15,000,000
Common Stock, Voting Rights, Votes Per Share	10	10
Common Stock, Capital Shares Reserved for Future Issuance	476,193	476,193	763,706
Blank Check Preferred Stock [Member]
Note 3 - Stockholders' Equity (Details) [Line Items]
Preferred Stock, Shares Authorized	20,000,000	20,000,000
Underwritten Offering [Member]
Note 3 - Stockholders' Equity (Details) [Line Items]
Stock Issued During Period, Shares, New Issues		13,500,000
Share Price (in Dollars per share)	$ 13.00	$ 13.00
Proceeds from Issuance of Common Stock (in Dollars)		167,500,000
Issuance of Stock, Underwriting Discount (in Dollars)		7,500,000
Issuance of Stock, Underwriting Expenses (in Dollars)		$ 700,000