Note 7 - Long-Term Debt (Details) (USD $) | Jun. 30, 2014 | Dec. 31, 2013 | Dec. 31, 2014 | Jun. 30, 2014 | Jun. 30, 2014 | Aug. 24, 2012 | Jun. 30, 2014 | Jun. 30, 2014 | Jun. 30, 2014 | Jun. 30, 2014 | Jun. 30, 2014 | Jun. 30, 2014 | Aug. 24, 2012 | Jun. 30, 2014 | Aug. 24, 2012 | Jun. 30, 2014 | Jun. 30, 2014 | Jun. 30, 2014 | Jun. 30, 2014 | 31-May-12 | Jun. 30, 2014 | Jan. 31, 2013 | Jun. 30, 2014 | Apr. 30, 2013 | Jun. 30, 2014 |
Scenario, Forecast [Member] | Scenario, Actual [Member] | Additional Restrictions [Member] | Revolver [Member] | Revolver [Member] | Revolver [Member] | Revolver [Member] | Revolver [Member] | Revolver [Member] | Revolver [Member] | Revolver [Member] | Revolver [Member] | Revolver [Member] | Capital Lease Obligations [Member] | Capital Lease Obligations [Member] | Letter of Credit [Member] | Revolver [Member] | IT Related Hardware [Member] | IT Related Hardware [Member] | IT Related Hardware [Member] | IT Related Hardware [Member] | IT Related Hardware [Member] | IT Related Hardware [Member] |
Revolver [Member] | Revolver [Member] | Revolver [Member] | Letter of Credit [Member] | Overnight Borrowings [Member] | Base Rate [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | | | Minimum [Member] | Minimum [Member] | Minimum [Member] | Maximum [Member] | | | | | | | | |
Maximum [Member] | | Maximum [Member] | | | | | Minimum [Member] | Maximum [Member] | | | | | | | | | | | | | | |
Note 7 - Long-Term Debt (Details) [Line Items] | ' | | ' | | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Line of Credit Facility, Maximum Borrowing Capacity | ' | | ' | | ' | ' | ' | $15,000,000 | ' | ' | ' | ' | ' | ' | $125,000,000 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Line of Credit Facility, Additional Borrowing Capacity | ' | | ' | | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 50,000,000 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Line of Credit Facility, Current Borrowing Capacity | ' | | ' | | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 18,800,000 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Line of Credit Facility, Capacity Available for Specific Purpose Other than for Trade Purchases | ' | | ' | | 73,500,000 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Book Value Of Excess Collateral | 140,200,000 | | ' | | ' | 41,800,000 | 20,000,000 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 30,000,000 | ' | ' | ' | ' | ' | ' |
Amortization of Borrowing Base | ' | | ' | | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 1,500,000 | ' | ' | ' | ' | ' | ' |
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate | ' | | ' | | ' | ' | ' | ' | ' | 1.50% | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Debt Instrument, Basis Spread on Variable Rate | ' | | ' | | ' | ' | ' | ' | ' | ' | 2.50% | 2.25% | 2.75% | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Long-term Line of Credit | 70,700,000 | [1] | 64,000,000 | [1] | ' | ' | ' | ' | 700,000 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 3,800,000 | ' | ' | ' | ' | ' | ' | ' |
Interest Rate on Overnight Borrowings | ' | | ' | | ' | ' | ' | ' | ' | ' | ' | ' | ' | 4.75% | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Line of Credit Facility, Interest Rate at Period End | ' | | ' | | ' | ' | ' | ' | ' | ' | ' | ' | ' | 3.00% | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Debt, Weighted Average Interest Rate | ' | | ' | | ' | ' | ' | ' | ' | ' | ' | ' | ' | 3.00% | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Line of Credit Facility, Remaining Borrowing Capacity | ' | | ' | | ' | ' | ' | ' | ' | ' | ' | ' | ' | 31,700,000 | ' | 18,800,000 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Capital Lease Obligations | 53,600,000 | | ' | | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Effective Interest Rate on Capital Leases | ' | | ' | | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 1.60% | 3.10% | ' | ' | ' | ' | ' | ' | ' | ' |
Purchase Obligation | ' | | ' | | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 360,000 | 179,000 | 295,000 | 230,000 | 300,000 | ' |
Debt Instrument, Periodic Payment | ' | | ' | | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 122,000 | 63,000 | ' | 5,600 | ' | ' |
Debt Instrument, Interest Rate, Effective Percentage | ' | | ' | | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 3.10% | ' | 4.50% | ' | 3.20% |
Contractual Obligation, Due in Next Twelve Months | $118,000 | | ' | | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
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[1] | $60,000,0000.375%II<$60,000,0000.500% Overnight borrowings were $0.7 million under the Revolver at June 30, 2014. The interest rate on our overnight borrowings under the Revolver at June 30, 2014 was 4.75%. The interest rate including all borrowings made under the Revolver at June 30, 2014 was 3.0%. The weighted average interest rate on our borrowings under the Revolver for the three months ended June 30, 2014 was 3.0%. The Revolver is collateralized by all non-leased revenue equipment having a net book value of approximately $140.2 million at June 30, 2014, and all billed and unbilled accounts receivable. As we reprice our debt on a monthly basis, the borrowings under the Revolver approximate its fair value. At June 30, 2014, we had outstanding $3.8 million in letters of credit and had approximately $31.7 million available under the Revolver (net of the minimum availability we are required to maintain of approximately $18.8 million)." id="sjs-B26">In 2012, we entered into a $125.0 million Revolver with Wells Fargo Capital Finance, LLC, as Administrative Agent, and PNC Bank. The Revolver, which expires in 2017, is collateralized by substantially all of our assets, and includes letters of credit not to exceed $15.0 million. In addition, the Revolver has an accordion feature whereby we may elect to increase the size of the Revolver by up to $50.0 million, subject to customary conditions and lender participation. The Revolver is governed by a borrowing base with advances against eligible billed and unbilled accounts receivable and eligible revenue equipment, and has a first priority perfected security interest in all of the business assets (excluding tractors and trailers financed through capital leases and real estate) of the Company. Proceeds are used to finance working capital, to fund capital expenditures and for general corporate purposes. The Revolver contains a minimum excess availability requirement equal to 15.0% of the maximum revolver amount (currently $18.8 million) and an annual capital expenditure limit ($73.5 million in 2014 and with further increases thereafter). Under the Revolver's terms, we are required to maintain a minimum collateral cushion above the maximum facility size, referred to as "suppressed availability." During 2014 (after giving effect to an amendment to the Revolver signed on March 14, 2014, and effective as of December 31, 2013), if we do not maintain the minimum suppressed availability threshold of $30.0 million, our borrowing availability will reduce by the amount of the shortfall below $30.0 million. After 2014, if we do not maintain the minimum suppressed availability threshold, the advance rate on eligible revenue equipment will reduce and a permanent amortization of the revenue equipment portion of our borrowing base at the rate of 1/72nd, or approximately $1.5 million, per month would result based on the June 30, 2014, revenue equipment collateral. At June 30, 2014, our suppressed availability was $41.8 million, which did not reduce our borrowing availability. Future fluctuations in the amount and value of equipment serving as collateral under the Revolver will impact our borrowing availability. If our suppressed availability falls below $20.0 million, there will be additional restrictions on which items of revenue equipment may be included in our eligible revenue equipment. The Revolver does not contain any financial maintenance covenants. The Revolver bears interest at rates typically based on the Wells Fargo prime rate or LIBOR, in each case plus an applicable margin. The Base Rate is equal to the greatest of (a) the prime lending rate as publicly announced from time to time by Wells Fargo Bank N.A., (b) the Federal Funds Rate plus 1.0%, and (c) the three month LIBOR Rate plus 1.0%. The Base Rate at June 30, 2014 was 1.5%. The LIBOR Rate is the rate at which dollar deposits are offered to major banks in the London interbank market two business days prior to the commencement of the requested interest period. Most borrowings are expected to be based on the LIBOR rate option. The applicable margin ranges from 2.25% to 2.75% based on average excess availability and at June 30, 2014, it was 2.5%. The Revolver 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 Revolver may be accelerated, and the lenders' commitments may be terminated. The Revolver also includes a cross default to other indebtedness with certain monetary threshold and acceleration requirements. Although there are no negative covenants relating to financial ratios or minimum balance sheet requirements, the Revolver 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. Applicable Margin means, as of any date of determination, the following margin based upon the most recent average excess availability calculation; provided, however, that for the period from the closing date through the testing period ended June 30, 2014, the Applicable Margin was at Level II and at any time that an Event of Default exists, the Applicable Margin shall be at Level III. LevelAverage Excess AvailabilityApplicable Margin in respect of Base Rate Loans under the RevolverApplicable Margin in respect of LIBOR Rate Loans under the RevolverI $50,000,0001.25%2.25%II<$50,000,000 but $30,000,0001.50%2.50%III<$30,000,000 1.75%2.75% We are required to pay a fee on the unused amount of the Revolver as set forth in the table below, which is due and payable monthly in arrears. For the period from the closing date through June 30, 2014, the unused fee was at Level II. LevelAverage Unused Portion of the Revolver plus Outstanding Letters of CreditApplicable Unused Revolver Fee MarginI>$60,000,0000.375%II<$60,000,0000.500% Overnight borrowings were $0.7 million under the Revolver at June 30, 2014. The interest rate on our overnight borrowings under the Revolver at June 30, 2014 was 4.75%. The interest rate including all borrowings made under the Revolver at June 30, 2014 was 3.0%. The weighted average interest rate on our borrowings under the Revolver for the three months ended June 30, 2014 was 3.0%. The Revolver is collateralized by all non-leased revenue equipment having a net book value of approximately $140.2 million at June 30, 2014, and all billed and unbilled accounts receivable. As we reprice our debt on a monthly basis, the borrowings under the Revolver approximate its fair value. At June 30, 2014, we had outstanding $3.8 million in letters of credit and had approximately $31.7 million available under the Revolver (net of the minimum availability we are required to maintain of approximately $18.8 million). |