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Note 12 - Common Stock and Additional Paid-in Capital (Detail) (USD $)
 1 Months Ended 6 Months Ended 7 Months Ended 12 Months Ended
Mar. 22, 2010
Jul. 18, 2007
Jul. 18, 2007
Aug. 01, 2007
Aug. 03, 2006
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2005
Dec. 31, 2012
Common Stock, Shares Authorized           100,000,000     100,000,000
Stock Issued During Period, Shares, New Issues       460,105 400,000     8,000,000  
Common Stock, Shares, Outstanding           20,552,568   14,000,000 20,627,329
Sale of Stock, Price Per Share (in Dollars per share)   $ 18.00 $ 18.00   $ 12.54        
Proceeds from Issuance or Sale of Equity (in Dollars)   $ 7,200,000              
Common Stock, Par or Stated Value Per Share (in Dollars per share)   $ 0.01 $ 0.01 $ 0.01   $ 0.01     $ 0.01
Proceeds from Issuance of Common Stock (in Dollars)     129,600,000 8,281,890          
Proceeds From Issuance of Equity, Net of Issuance Costs (in Dollars)     121,932,958 7,826,386          
Class of Warrant or Right, Number of Securities Called by Warrants or Rights   1,080,000 1,080,000            
Stock Repurchase Program, Authorized Amount (in Dollars) $ 15,000,000                
Stock Repurchased During Period, Shares           551,646 1,205,229    
Treasury Stock Acquired, Average Cost Per Share (in Dollars per share)           $ 4.05 $ 5.21