Note 7 - Debt (Details) - Current and Long-term Debt (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Note 7 - Debt (Details) - Current and Long-term Debt [Line Items]
Borrowings under Credit Facility	$ 12,554	$ 5
Total debt	44,395	63,636
Total debt	122,810	95,214
Capital lease obligations, secured by related revenue equipment	2,164	2,091
Capital lease obligations, secured by related revenue equipment	12,902	14,003
Total debt and capital lease obligations	46,559	65,727
Total debt and capital lease obligations	135,712	109,217
Revenue Equipment Installment Notes [Member]
Note 7 - Debt (Details) - Current and Long-term Debt [Line Items]
Notes payable, current	42,109	61,200
Notes payable, long-term	110,015	94,920
Real Estate Note [Member]
Note 7 - Debt (Details) - Current and Long-term Debt [Line Items]
Notes payable, current	2,178	2,328
Other Note Payable [Member]
Note 7 - Debt (Details) - Current and Long-term Debt [Line Items]
Notes payable, current	108	108
Notes payable, long-term	$ 241	$ 289