Note 11 - Long-term Debt (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended	26 Months Ended												2 Months Ended	3 Months Ended	2 Months Ended	3 Months Ended
	Sep. 30, 2012	Jun. 30, 2012	Jun. 30, 2012	Apr. 19, 2010	Apr. 19, 2010 Minimum [Member] Base Rate Loans [Member]	Apr. 19, 2010 Minimum [Member] LIBOR Loans [Member]	Apr. 19, 2010 Minimum [Member] Euro Dollar Loans [Member]	Jun. 30, 2012 Minimum [Member]	Apr. 19, 2010 Minimum [Member]	Apr. 19, 2010 Maximum [Member] Base Rate Loans [Member]	Apr. 19, 2010 Maximum [Member] LIBOR Loans [Member]	Apr. 19, 2010 Maximum [Member] Euro Dollar Loans [Member]	Jun. 30, 2012 Maximum [Member]	Apr. 19, 2010 Maximum [Member]	Aug. 24, 2012 Fee, Basis Points [Member]	Jun. 30, 2012 Fee, Basis Points [Member]	Aug. 24, 2012 Fee [Member]	Jun. 30, 2012 Fee [Member]
Line of Credit Facility, Covenant Terms			On April 19, 2010, we entered into a Credit Agreement with Branch Banking and Trust Company as Administrative Agent, which replaced our Amended and Restated Senior Credit Facility scheduled to mature on September 1, 2010. The Credit Agreement provides for available borrowings of up to $100.0 million, including letters of credit not to exceed $25.0 million. Availability may be reduced by a borrowing base limit as defined in the Credit Agreement. The Credit Agreement provides an accordion feature allowing us to increase the maximum borrowing amount by up to an additional $75.0 million in the aggregate in one or more increases, subject to certain conditions.The Credit Agreement bears variable interest based on the type of borrowing and on the Administrative Agent's prime rate or the London Interbank Offered Rate plus a certain percentage, which is determined based on our attainment of certain financial ratios. A quarterly commitment fee is payable on the unused portion of the credit line and bears a rate which is determined based on our attainment of certain financial ratios. The obligations of the Company under the Credit Agreement are guaranteed by the Company and secured by a pledge of substantially all of the Company's assets with the exception of real estate. The Credit Agreement includes usual and customary events of default for a facility of this nature and provides that, upon the occurrence and continuation of an event of default, payment of all amounts payable under the Credit Agreement may be accelerated, and the lenders' commitments may be terminated. The Credit Agreement contains certain restrictions and covenants relating to, among other things, dividends, liens, acquisitions and dispositions outside of the ordinary course of business, and affiliate transactions.The new Credit Agreement will expire on April 19, 2014. Borrowings under the Credit Agreement are classified as "base rate loans," "LIBOR loans" or "Euro dollar loans." Base rate loans accrue interest at a base rate equal to the Administrative Agent's prime rate plus an applicable margin that is adjusted quarterly between 0.0% and 1.5%, based on the Company's leverage ratio.LIBOR loans accrue interest at LIBOR plus an applicable margin that is adjusted quarterly between 2.00% and 3.75% based on the Company's leverage ratio.Euro dollar loans accrue interest at the LIBOR rate in effect at the beginning of the month in which the borrowing occurs plus an applicable margin that is adjusted quarterly between 2.00% and 3.75% based on the Company's leverage ratio.On a quarterly basis, the Company must pay a fee on the unused amount of the revolving credit facility of between 0.25% and 0.375% based on the Company's leverage ratio, and it must pay an annual administrative fee to the Administrative Agent of 0.03% of the total commitments. On March 8, 2012, we entered into a Second Amendment to Credit Agreement (the "Second Amendment") with Branch Banking and Trust Company, as Administrative Agent (the "Agent"), Regions Bank, as Syndications Agent, U.S. Bank National Association, Bank of America, N.A., and BancorpSouth (collectively, the "Lenders"), which amends the Credit Agreement, dated April 19, 2010, by and among the Company, the Agent, and the Lenders.We amended the Credit Agreement to prevent a default and ease two of the financial covenants. The Second Amendment, among other things, (i) amended the "Applicable Margin" and "Applicable Unused Fee Rate" as set forth in the tables below, (ii) eased the consolidated leverage ratio through the 2012 calendar year such that, where previously the ratio of consolidated debt to consolidated EBITDAR was not to exceed 3.00 to 1.00, now the consolidated leverage ratio is not to exceed 3.60 to 1.00 for the period January 1, 2012 through June 30, 2012; 3.40 to 1.00 for the period July 1, 2012 through September 30, 2012; 3.25 to 1.00 for the period October 1, 2012 through December 31, 2012; and 3.00 to 1.00 for the period commencing January 1, 2013 and at all times thereafter, and (iii) eased the consolidated fixed charge coverage ratio through the 2012 calendar year such that, where previously the consolidated fixed charge coverage ratio was not to be less than 1.40 to 1.00, now the consolidated fixed charge coverage ratio is not to fall below 1.00 to 1.00 for the period January 1, 2012 through June 30, 2012; 1.10 to 1.00 for the period July 1, 2012 through September 30, 2012; 1.20 to 1.00 for the period October 1, 2012 through December 31, 2012; and 1.40 to 1.00 for the period commencing January 1, 2013 and at all times thereafter												thirty		$300,000
Line of Credit Facility, Maximum Borrowing Capacity (in Dollars)				$ 100.0
Letters of Credit, Maximum Borrowing Capacity (in Dollars)				25.0
Line of Credit Facility, Additional Borrowing Capacity (in Dollars)				75.0
Debt Instrument, Basis Spread on Variable Rate					0.00%	2.00%	2.00%			1.50%	3.75%	3.75%
Debt Instrument, Unused Borrowing Capacity, Percentage Fee									0.25%					0.375%
Debt Instrument, Annual Administrative Fee				0.03%
Interest Rate on Overnight Borrowings		4.25%	4.25%
Debt, Weighted Average Interest Rate		4.10%	4.10%
Debt Instrument, Interest Rate During Period		4.00%
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage		0.375%
Book Value of Revenue Equipment Pledged as Collateral for Credit Agreements (in Dollars)		165.4	165.4
Letters of Credit Outstanding, Amount (in Dollars)		2.2	2.2
Line of Credit Facility, Covenant Compliance	At June 30, 2012, we were not in compliance with all of the financial covenants contained in our Credit Agreement.We paid a ten (10) basis points fee ($100,000) to obtain a waiver from our bank group for such non-compliance and, if the Credit Agreement is not refinanced by August 24, 2012, we will be charged an additional thirty (30) basis points fee ($300,000) for the extension of the waiver.Commencing September7, 2012, and at various dates through October31, 2012, we must take further steps to protect the interests of our existing lenders if the Credit Agreement is not refinanced by such dates. Subsequent to June 30, 2012, we must continue to comply with our financial covenants.We do not believe that we will be in compliance with all of our covenants based upon our September 30, 2012 results.Because the waiver does not extend to financial covenants measured after June 30, 2012, and because we do not expect to be in compliance with the financial covenants based upon September 30, 2012 results, the amount due under the Credit Agreement has been classified as current in the accompanying consolidated balance sheet at June 30, 2012															ten		$100,000
Capital Lease Obligations (in Dollars)		$ 49.7	$ 49.7
Effective Interest Rate on Capital Leases								1.60%					4.00%