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Note 11 - Commitments and Contingencies (Details Textual) - USD ($)
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Liability for Unpaid Claims and Claims Adjustment Expense, Incurred but Not Reported (IBNR) Claims, Amount $ 4,000,000 $ 2,900,000  
Self Insurance Excess Reinsurance, Aggregate Deductible 5,200,000    
Self Insurance Workers Compensation Claims, Amount Per Occurrence 500,000    
Self Insurance General Liability, Amount Per Occurrence 250,000    
Self Insurance Auto Claims, Amount Per Occurrence 100,000    
Self Insurance Workers Compensation Claims, Maximum Liability 5,000,000    
Self Insurance Plan Expenses 3,000,000 $ 2,000,000 $ 2,200,000
RLW and JBC [Member]      
Self Insurance Excess Reinsurance 55,000    
Other Entities [Member]      
Self Insurance Excess Reinsurance $ 145,000