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Note 3 - Variable Interest Entities (Detail) (USD $)
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage 50.00%  
Long-term Line of Credit, Noncurrent (in Dollars) $ 24,012,000  
Variable Interest Entity Income Percentage 50.00%  
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Percentage 50.00%  
Equity Method Investment, Ownership Percentage 3.00%  
Number of Noncontrolling Owners   1
Myers [Member]
    
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage   50.00%
Long-term Line of Credit, Noncurrent (in Dollars) 3,000,000  
Other Noncontrolling Interest Owners [Member]
    
Secured Demand Notes (in Dollars)   500,000