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Note 5 - Claims Liabilities (Details Textual)
Dec. 31, 2015
USD ($)
Auto Liability [Member]  
Per Occurrence Deductibles $ 2,500
Truck Coverage [Member]  
Per Occurrence Deductibles 7,500
Cargo Loss Coverage [Member]  
Per Occurrence Deductibles 10,000
Trailers [Member]  
Per Occurrence Deductibles 2,500
Workers Compensation Coverage [Member]  
Letters of Credit Outstanding, Amount 600,000
Certificates of Deposit, at Carrying Value 300,000
Workers Compensation Self Insured Retention 500,000
Workers Compensation Per Occurrence Excess Policy 500,000
Letters of Credit Outstanding, Amount 791,000
Stop Loss for Self Insurance for Employee Health Claims Per Covered Employee Per Year $ 325,000