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Note 7 - Income Taxes (Details) - Summary Reconciliation Reported Amount of Income Tax Expense to the Amount Of Income Tax Expense Under Federal Statutory Tax Rates (USD $)
 3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Summary Reconciliation Reported Amount of Income Tax Expense to the Amount Of Income Tax Expense Under Federal Statutory Tax Rates [Abstract]    
Tax expense (benefit) at the U.S. federal statutory rate $ 168,000 $ (2,526,000)
Tax expense (benefit) at the U.S. federal statutory rate 35.00% 35.00%
State franchise and income tax based on income, net of refunds and federal benefits 5,000 (115,000)
State franchise and income tax based on income, net of refunds and federal benefits 1.00% 1.60%
Taxes on subsidiaries’ and joint ventures’ earnings allocated to noncontrolling ownership interests (165,000) (59,000)
Taxes on subsidiaries’ and joint ventures’ earnings allocated to noncontrolling ownership interests (34.40%) 0.80%
Valuation allowance (55,000)  
Valuation allowance (11.50%)  
Non-taxable interest income   (80,000)
Non-taxable interest income   1.10%
Other permanent differences 47,000 (20,000)
Other permanent differences 9.90% 0.30%
Income tax benefit $ 0 $ (2,800,000)
Income tax benefit   38.80%