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Note 6 - Long-term Debt (Details) - Summary of Long-term Debt (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Debt Instrument [Line Items]    
Long-term debt $ 110,469 $ 107,501
Less current maturities (40,103) (28,918)
Long-term debt—net of current maturities 70,366 78,583
Line of Credit [Member]
    
Debt Instrument [Line Items]    
Long-term debt    [1] 5,417 [1]
Secured Debt [Member]
    
Debt Instrument [Line Items]    
Long-term debt $ 110,469 [2] $ 102,084 [2]
[1] Line of credit agreement with a bank provides for maximum borrowings of $35.0 million and contains certain restrictive covenants that must be maintained by the Company on a consolidated basis. Borrowings on the line of credit are at an interest rate of LIBOR as of the first day of the month plus 1.75% (1.92% at December 31, 2013) and are secured by our trade accounts receivable. Monthly payments of interest are required under this agreement. Also, under the terms of the agreement the Company must have (a) a debt to equity ratio of no more than 2.15:1, and (b) maintain a tangible net worth of at least $115 million. The Company was in compliance with all provisions of the agreement throughout 2013.
[2] Equipment financings consist of installment obligations for revenue equipment purchases, payable in various monthly installments with various maturity datesthrough September 2018, at a weighted average interest rate of 2.91% as of December 31, 2013 and collateralized by revenue equipment.