USA Truck (USAK) 10-K 6 Mar 15 2014 FY Annual report Financial data

Document_And_Entity_Informatio

Document And Entity Information (USD $)	12 Months Ended
	Dec. 31, 2014	Feb. 20, 2015	Jun. 30, 2014
Document and Entity Information [Abstract]
Entity Registrant Name	USA Truck Inc
Document Type	10-K
Current Fiscal Year End Date	-19
Entity Common Stock, Shares Outstanding		10,532,633
Entity Public Float			$134,172,879
Amendment Flag	FALSE
Entity Central Index Key	883945
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Smaller Reporting Company
Entity Well-known Seasoned Issuer	No
Document Period End Date	31-Dec-14
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	FY

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Dec. 31, 2014
In Thousands, unless otherwise specified
Current assets:
Cash and cash equivalents	$205
Accounts receivable, net	76,825
Inventories	1,863
Assets held for sale	3,536
Deferred income taxes	7,707
Prepaid expenses and other current assets	17,318
Total current assets	107,454
Property and equipment:
Land and structures	31,596
Revenue equipment	348,216
Service, office and other equipment	16,648
Property and equipment, at cost	396,460
Accumulated depreciation and amortization	-182,724
Property and equipment, net	213,736
Note receivable	0
Other assets	658
Total assets	321,848
Current liabilities:
Accounts payable	23,582
Current portion of insurance and claims accruals	10,230
Accrued expenses	8,252
Current maturities of long-term debt and capital leases	24,048
Total current liabilities	66,112
Deferred gain	589
Long-term debt and capital leases, less current maturities	93,464
Deferred income taxes	46,688
Insurance and claims accruals, less current portion	9,647
Commitments and contingencies
Stockholders’ equity:
Preferred stock, $0.01 par value; 1,000,000 shares authorized; none issued	0
Common stock, $0.01 par value; authorized 30,000,000 shares; issued and outstanding 11,873,071 shares in 2014 and 11,881,232 shares in 2013	119
Additional paid-in capital	65,850
Retained earnings	61,082
Less treasury stock, at cost (1,340,438 shares in 2014 and 1,356,400 shares in 2013)	-21,703
Total stockholders’ equity	105,348
Total liabilities and stockholders’ equity	$321,848

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parentheticals) (USD $)	Dec. 31, 2014
Par value (in Dollars per share)	$0.01
Shares authorized	1,000,000
Shares issued	0
Common Stock, par value (in Dollars per share)	$0.01
Common Stock, shares authorized	30,000,000
Common Stock, shares issued	11,873,071
Common Stock, shares outstanding	11,873,071
Treasury stock	1,340,438

Consolidated_Statements_of_Ope

Consolidated Statements of Operations and Comprehensive Income (Loss) (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Operating revenue	$602,477	$555,005	$512,428
Operating expenses:
Salaries, wages and employee benefits	153,410	143,762	142,263
Fuel and fuel taxes	116,092	135,548	131,162
Depreciation and amortization	43,830	44,947	45,058
Insurance and claims	24,910	27,253	20,556
Operations and maintenance	49,374	49,494	43,559
Purchased transportation	172,117	139,091	127,949
Operating taxes and licenses	5,589	5,406	5,504
Communications and utilities	4,062	4,117	4,124
Gain on disposal of assets	-1,107	-1,648	-2,151
Other	16,957	15,702	17,676
Total operating expenses	585,234	563,672	535,700
Operating income (loss)	17,243	-8,667	-23,272
Other expenses (income):
Interest expense, net	3,008	3,662	4,052
Defense costs	2,764	1,480
Other, net	245	-711	-64
Total other expenses, net	6,017	4,431	3,988
Income (loss) before income taxes	11,226	-13,098	-27,260
Income tax expense (benefit)	5,193	-3,988	-9,589
Net income (loss) and comprehensive income (loss)	$6,033	($9,110)	($17,671)
Net earnings (loss) per share:
Average shares outstanding (basic) (in Shares)	10,356	10,323	10,310
Basic earnings (loss) per share (in Dollars per share)	$0.58	($0.88)	($1.71)
Average shares outstanding (diluted) (in Shares)	10,485	10,323	10,310
Diluted earnings (loss) per share (in Dollars per share)	$0.58	($0.88)	($1.71)

Consolidated_Statements_of_Sto

Consolidated Statements of Stockholders' Equity (USD $)	Common Stock [Member]	Common Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Additional Paid-in Capital [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Retained Earnings [Member]	Retained Earnings [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Treasury Stock [Member]	Treasury Stock [Member]	Scenario, Previously Reported [Member]	Restatement Adjustment [Member]	Scenario, Actual [Member]	Total
In Thousands	Scenario, Previously Reported [Member]	Scenario, Actual [Member]		Scenario, Previously Reported [Member]	Scenario, Actual [Member]		Scenario, Previously Reported [Member]	Restatement Adjustment [Member]	Scenario, Actual [Member]		Scenario, Previously Reported [Member]	Scenario, Actual [Member]
Balance at December 31 at Dec. 31, 2011			$118			$65,284				$83,438			($21,868)				$126,972
Balance at December 31 (in Shares) at Dec. 31, 2011			11,792
Net Income (loss)										-17,671							-17,671
Transfer of stock into (out of) treasury stock						-154							154
Stock-based compensation						131											131
Restricted stock award grant (in Shares)			26
Forfeited restricted stock (in Shares)			-48
Net share settlement related to restricted stock vesting						-2											-2
Balance at December 31 at Dec. 31, 2012			118			65,259				65,767			-21,714				109,430
Balance at December 31 (in Shares) at Dec. 31, 2012			11,770
Prior period revision of net deferred tax liability (Deferred Tax Adjustment, Prior Period [Member])								-1,608							-1,608
Net Income (loss)										-9,110							-9,110
Exercise of stock options						6											6
Transfer of stock into (out of) treasury stock						51							-51
Stock-based compensation						216											216
Restricted stock award grant			1			-2											-1
Restricted stock award grant (in Shares)			156
Forfeited restricted stock (in Shares)			-45
Net share settlement related to restricted stock vesting						-3											-3
Balance at December 31 at Dec. 31, 2013	119	119		65,527	65,527		56,657		55,049		-21,765	-21,765		100,538		98,930
Balance at December 31 (in Shares) at Dec. 31, 2013	11,881	11,881
Net Income (loss)										6,033							6,033
Exercise of stock options					158											158
Exercise of stock options (in Shares)		16															28,884
Transfer of stock into (out of) treasury stock					-62							62
Stock-based compensation					366											366
Restricted stock award grant (in Shares)		21
Forfeited restricted stock (in Shares)		-35
Net share settlement related to restricted stock vesting					-139											-139
Net share settlement related to restricted stock vesting (in Shares)		-10
Balance at December 31 at Dec. 31, 2014			$119			$65,850				$61,082			($21,703)				$105,348
Balance at December 31 (in Shares) at Dec. 31, 2014			11,873

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Operating activities
Net income (loss)	$6,033	($9,110)	($17,671)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	43,830	44,947	45,058
Provision for doubtful accounts	782	187	153
Deferred income taxes	5,121	-4,774	-9,589
Share based compensation	366	216	131
Gain on disposal of assets	-1,107	-1,648	-2,151
Other	-38	-250	161
Changes in operating assets and liabilities:
Accounts receivable	-7,531	-1,752	-9,792
Inventories, prepaid expenses and other current assets	-621	1,103	1,098
Trade accounts payable and accrued expenses	1,417	-3,783	4,416
Insurance and claims accruals	1,462	10,757	3,722
Net cash provided by operating activities	49,714	35,893	15,536
Investing activities
Purchases of property and equipment	-54,372	-12,924	-22,014
Proceeds from sale of property and equipment	16,923	15,757	17,651
Change in other assets	20	38	15
Net cash (used in) provided by investing activities	-37,429	2,871	-4,348
Financing activities
Borrowings under long-term debt	74,168	78,478	276,556
Principal payments on long-term debt	-67,353	-98,222	-263,811
Principal payments on capitalized lease obligations	-18,073	-17,230	-23,136
Principal payments on note payable	-1,494	-1,715	-1,820
Net increase in bank drafts payable	639	-1,805	106
Proceeds from employee stock options	19	2
Net cash used in financing activities	-12,094	-40,492	-12,105
Increase (decrease) in cash and cash equivalents	191	-1,728	-917
Cash and cash equivalents:
Beginning of year	14	1,742	2,659
End of year	205	14	1,742
Cash paid during the period for:
Interest	3,359	3,802	4,274
Income taxes	3,003	477	165
Supplemental schedule of non-cash investing and financing activities:
Liability incurred for capitalized leases on revenue equipment		27,603	27,757
Liability incurred for notes payable	1,367	1,387	1,801
Accounts Payable [Member]
Supplemental schedule of non-cash investing and financing activities:
Capital Expenditures Incurred but Not yet Paid	34	5
Long-term Debt [Member]
Supplemental schedule of non-cash investing and financing activities:
Capital Expenditures Incurred but Not yet Paid			$355

Note_1_Description_of_Business

Note 1 - Description of Business and Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2014
Disclosure Text Block [Abstract]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]	NOTE 1. Description of Business and Summary of Significant Accounting Policies
	Description of business
	USA Truck, Inc., a Delaware corporation (the “Company”) is a truckload carrier providing transportation of general commodities throughout the continental United States and into and out of portions of Mexico and Canada. Generally, the Company transports full dry van trailer loads of freight from origin to destination without intermediate stops or handling. As a complement to the Company’s truckload operations, it also provides dedicated, brokerage and rail intermodal services. For shipments into Mexico, the Company transfers its trailers to tractors operated by Mexican carriers at a facility in Laredo, Texas, which is operated by the Company’s wholly owned subsidiary. Through the Company’s asset based and non-asset based capabilities, it transports many types of freight for a diverse customer base in a variety of industries.
	Basis of presentation
	The accompanying consolidated financial statements include the accounts of USA Truck and its wholly owned subsidiary. All significant intercompany balances and transactions have been eliminated in preparing the consolidated financial statements. Certain amounts reported in prior periods have been reclassified to conform to the current year presentation.
	In the opinion of management, the accompanying financial statements have been prepared in accordance with United States generally accepted accounting principles (“GAAP”), and include all adjustments necessary for the fair presentation of the periods presented. Management has evaluated the effect on the Company’s reported financial condition and results of operations of events subsequent to December 31, 2014 through the issuance of the financial statements.
	Use of estimates
	The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Some of the significant estimates made by management include, but are not limited to, allowances for doubtful accounts, useful lives for depreciation and amortization, estimates related to the Company’s share-based compensation plan, deferred taxes and reserves for claims liabilities. Management evaluates its estimates and assumptions on an ongoing basis using historical experience and other factors (including, but not limited to, the current economic environment), which management believes to be reasonable under the circumstances. Management adjusts such estimates and assumptions when facts and circumstances dictate. As future events and their effects cannot be determined with precision, actual results could differ significantly from these estimates.
	Cash equivalents
	The Company considers all highly liquid investments with a maturity of three months or less when purchased to be cash equivalents. The carrying amount reported in the balance sheet for cash and cash equivalents approximates its fair value.
	Accounts receivable and concentration of credit risk
	Trade accounts receivable are recorded at their invoiced amounts, net of allowance for doubtful accounts. The allowance for doubtful accounts is management’s estimate of the amount of probable credit losses and revenue adjustments in the Company’s existing accounts receivable. Management reviews the financial condition of customers for granting credit and determines the allowance based on analysis of individual customers’ financial condition, historical write-off experience and national economic conditions. The Company evaluates the adequacy of its allowance for doubtful accounts quarterly. Past due balances over 90 days and exceeding a specified amount are reviewed individually for collectability. Account balances are charged off against the allowance after all means of collection have been exhausted and the potential for recovery is considered remote. The Company does not have any off-balance-sheet credit exposure related to its customers. The carrying amount reported in the consolidated balance sheets for accounts receivable approximates fair value as receivables collection averaged approximately 44 days from the billing date.
	The following table provides a summary of the accounts receivable for the periods indicated (in thousands):
		Year Ended December 31,
		2014			2013
	Trade customers	$	72,206		$	65,292
	Other		5,639			3,463
	Total accounts receivable		77,845			68,755
	Less: Allowance for doubtful accounts		(1,020	)		(610	)
	Accounts receivable, net	$	76,825		$	68,145
	The following table provides a summary of the activity in the allowance for doubtful accounts for 2014, 2013 and 2012 (in thousands):
		Year Ended December 31,
		2014			2013			2012
	Balance at beginning of year	$	610		$	423		$	420
	Provision for doubtful accounts		782			187			153
	Uncollectible accounts written off, net of recovery		(372	)		--			(150	)
	Balance at end of year	$	1,020		$	610		$	423
	Assets held for sale
	Assets held for sale are comprised of revenue equipment not being utilized in operations and are carried at the lower of depreciated cost or estimated fair value less expected selling costs when the required criteria, as defined by ASC Topic 360 “Property, Plant and Equipment” are satisfied. Depreciation ceases on the date that the held for sale criteria are met. The Company expects to sell these assets within the next twelve months.
	Inventories
	Inventories consist of tires, fuel, supplies and Company store merchandise and are stated at the lower of cost (first-in, first-out basis) or market.
	Property and equipment
	Property and equipment is capitalized at cost. The cost of such property is depreciated by the straight-line method using the following estimated useful lives: structures – 5 to 39.5 years; revenue equipment – 4 to 14 years; and service, office and other equipment – 3 to 20 years. Revenue equipment acquired under capital lease is amortized over the lease term. Trade-in allowances in excess of book value of revenue equipment are accounted for by adjusting the cost of assets acquired. Tires purchased with revenue equipment as well as replacement tires are amortized under the Company’s prepaid tire policy.
	The Company reviews its long-lived assets for impairment whenever events or circumstances indicate the carrying amount of a long-lived asset may not be recoverable. An impairment loss would be recognized if the carrying amount of the long-lived asset is not recoverable and the carrying amount exceeds its fair value. For long-lived assets classified as held and used, the carrying amount is not recoverable when the carrying value of the long-lived asset exceeds the sum of the future net cash flows.
	Income taxes
	Deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the tax basis amounts for income tax purposes. Significant components of the Company’s deferred tax liabilities and assets include temporary differences relating to depreciation, capitalized leases and certain prepaid and accrued expenses. The Company has analyzed filing positions in its federal and applicable state tax returns in all open tax years. In general, the Company’s 2009 through 2014 tax returns are subject to adjustment. Because the Company had generated net operating losses (“NOLs”) in prior years, the federal and applicable state statute of limitations remains open beyond the normal three-year period to extent of its NOL carry forwards, which may be adjusted until the tax year in which the NOLs are utilized has expired. In 2014, the IRS completed its examination of the 2011 federal income tax return. No meaningful adjustments were identified. The Company’s policy is to recognize interest related to unrecognized tax benefits as interest expense and penalties as operating expenses. The Company believes that its income tax filing positions and deductions will be sustained on audit and does not anticipate any adjustments that will result in a material change to its consolidated financial position, results of operations and cash flows. Therefore, no reserves for uncertain income tax positions or associated interest or penalties on uncertain tax positions have been recorded.
	Claims accruals
	The primary claims arising against the Company consist of cargo, liability, personal injury, property damage, workers' compensation, and employee medical expenses. The Company’s insurance program involves self-insurance with high risk retention levels. Due to its significant self-insured retention amounts, the Company has exposure to fluctuations in the number and severity of claims and to variations between its estimated and actual ultimate payouts. The Company accrues the estimated cost of the uninsured portion of pending claims and an estimate for allocated loss adjustment expenses including legal and other direct costs associated with a claim. Estimates require judgments concerning the nature and severity of the claim, historical trends, advice from third-party administrators and insurers, the size of any potential damage award based on factors such as the specific facts of individual cases, the jurisdictions involved, the prospect of punitive damages, future medical costs, and inflation estimates of future claims development, and the legal and other costs to settle or defend the claims. USA Truck has significant exposure to fluctuations in the number and severity of claims. If there is an increase in the frequency and severity of claims, or the Company is required to accrue or pay additional amounts if the claims prove to be more severe than originally assessed, or any of the claims would exceed the limits of its insurance coverage, its profitability could be adversely affected.
	Earnings (loss) per share
	Basic earnings (loss) per share is computed based on the weighted-average number of shares of common stock outstanding during the year. Diluted earnings (loss) per share is computed by adjusting the weighted-average shares outstanding by common stock equivalents attributable to dilutive stock options and restricted stock.
	Revenue recognition
	Revenue generated by the Company’s trucking operating segment is recognized in full upon completion of delivery of freight to the receiver’s location. For freight in transit at the end of a reporting period, the Company recognizes revenue pro rata based on relative transit time completed as a portion of the estimated total transit time. Expenses are recognized as incurred.
	Revenue generated by the Company’s SCS segment is recognized upon completion of the services provided. Revenue is recorded on a gross basis, without deducting third party purchased transportation costs, because the Company acts as a principal with substantial risks as primary obligor.
	Management believes these policies most accurately reflect revenue as earned and direct expenses, including third party purchased transportation costs, as incurred.
	New accounting pronouncements
	In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update No. 2014-09, Revenue from Contracts with Customers (“ASU 2014-09”), which supersedes nearly all existing revenue recognition guidance under GAAP. The core principle of ASU 2014-09 is to recognize revenue when promised goods or services are transferred to customers in an amount that reflects the consideration to which an entity expects to be entitled for those goods or services. ASU 2014-09 defines a five step process to implement this core principle and, in doing so, more judgment and estimates may be required within the revenue recognition process than are required under existing GAAP.
	The standard is effective for annual periods beginning after December 15, 2016, and interim periods therein, using either of the following transition methods: (i) a full retrospective approach reflecting the application of the standard in each prior reporting period with the option to elect certain practical expedients, or (ii) a retrospective approach with the cumulative effect of initially adopting ASU 2014-09 recognized at the date of adoption (which includes additional footnote disclosures). Management is currently evaluating the impact of the pending adoption of ASU 2014-09 on the Company’s consolidated financial statements and has not yet determined the method by which the Company will adopt the standard in its 2017 fiscal year.
	In August 2014, the FASB issued ASU No. 2014-15, Disclosure of Uncertainties about an Entity's Ability to Continue as a Going Concern, which requires an entity to evaluate whether conditions or events, in the aggregate, raise substantial doubt about the entity's ability to continue as a going concern for one year from the date the financial statements are issued or are available to be issued. The guidance will become effective January 1, 2017. The adoption of ASU 2014-15 is not expected to have an impact on the Company’s consolidated financial statements.

Note_2_Segment_Reporting

Note 2 - Segment Reporting	12 Months Ended
	Dec. 31, 2014
Segment Reporting [Abstract]
Segment Reporting Disclosure [Text Block]	NOTE 2. Segment Reporting
	The Company’s two reportable segments are Trucking and Strategic Capacity Solutions (“SCS”).
	Trucking. Trucking is comprised of truckload and dedicated freight services. Truckload provides services as a medium-to long-haul common carrier. USA Truck has provided truckload services since its inception, and derives the largest portion of its revenue from these services. Dedicated freight provides truckload services to specific customers for shipments over particular routes at particular times utilizing Company revenue equipment.
	Strategic Capacity Solutions. SCS consists of freight brokerage and rail intermodal services. Both of these service offerings match customer shipments with available equipment of authorized carriers and provide services that complement the Company’s trucking operations. USA Truck provides these services primarily to existing trucking customers, many of whom prefer to rely on a single carrier, or a small group of carriers, to provide all their transportation solutions.
	In determining its reportable segments, the Company focuses on financial information, such as operating revenue, operating expense categories, operating ratios, operating income and key operating statistics, which the Company’s management uses to make operating decisions.
	Revenue equipment assets are not allocated to SCS, as those operations provide truckload freight services to customers through arrangements with third party carriers who utilize their own equipment. To the extent rail intermodal operations require the use of company-owned assets, they are obtained from the Company’s trucking segment on an as-needed basis. Depreciation and amortization expense is allocated to SCS based on the company-owned assets specifically utilized to generate revenue. All intercompany transactions between segments reflect rates similar to those that would be negotiated with independent third parties. All other expenses for SCS are specifically identifiable direct costs or are allocated to SCS based on relevant drivers, as determined by management.
	A summary of operating revenue by segment is as follows (in thousands):
			Year Ended December 31,
			2014			2013			2012
	Operating revenue:
	Trucking revenue (1)		$	424,082		$	418,601		$	381,569
	Trucking intersegment eliminations			(587	)		(486	)		(24	)
	Trucking operating revenue			423,495			418,115			381,545
	SCS revenue			192,924			146,492			156,349
	SCS intersegment eliminations			(13,942	)		(9,602	)		(25,466	)
	SCS operating revenue			178,982			136,890			130,883
	Total operating revenue		$	602,477		$	555,005		$	512,428
		-1	Includes foreign revenue of $57.3 million, $57.1 million, and $45.5 million for years ended December 31, 2014, 2013 and 2012, respectively.
	A summary of operating income (loss) by segment is as follows (in thousands):
			Year Ended December 31,
			2014			2013			2012
	Operating income (loss):
	Trucking		$	(3,532	)	$	(17,667	)	$	(29,843	)
	SCS			20,775			9,000			6,571
	Total operating income (loss)		$	17,243		$	(8,667	)	$	(23,272	)
	A summary of depreciation and amortization by segment is as follows (in thousands):
			Year Ended December 31,
			2014			2013			2012
	Depreciation and amortization:
	Trucking		$	43,648		$	44,697		$	44,558
	SCS			182			250			500
	Total depreciation and amortization		$	43,830		$	44,947		$	45,058

Note_3_Prepaid_and_Other_Curre

Note 3 - Prepaid and Other Current Assets	12 Months Ended
	Dec. 31, 2014
Disclosure Text Block Supplement [Abstract]
Other Current Assets [Text Block]	NOTE 3. Prepaid and Other Current Assets
	Prepaid expenses and other current assets consist of the following (in thousands):
		Year Ended December 31,
		2014		2013
	Prepaid tires	$	12,121	$	10,607
	Prepaid licenses, permits and tolls		1,923		1,915
	Prepaid insurance		1,166		1,414
	Other		2,108		2,128
	Total prepaid expenses and other current assets	$	17,318	$	16,064

Note_4_Note_Receivable

Note 4 - Note Receivable	12 Months Ended
	Dec. 31, 2014
Receivables [Abstract]
Loans, Notes, Trade and Other Receivables Disclosure [Text Block]	NOTE 4. Note Receivable
	During November 2010, the Company sold its terminal facility in Shreveport, Louisiana. In connection with this sale, the buyer gave the Company cash in the amount of $0.2 million and a note receivable in the amount of $2.1 million. The note receivable bears interest at an annual rate of 7.0%, matures in five years and has scheduled principal and interest payments based on a 30-year amortization schedule. A balloon payment in the approximate amount of $1.9 million is payable to the Company when the note matures in 2015. Accordingly, the Company deferred the approximate $0.7 million gain on the sale of this facility, and records this gain into earnings as payments on the note receivable are received. During the years ended December 31, 2014, 2013 and 2012, respectively, the Company recognized approximately $7,800, $7,300 and $6,800, respectively, of this gain. The Company believes that the note receivable balance at December 31, 2014, in the approximate amount of $1.9 million, is fully collectible and accordingly has not recorded any valuation allowance against the note receivable and is included in the accounts receivable, net line item in the accompanying consolidated balance sheet.

Note_5_Accrued_Expenses

Note 5 - Accrued Expenses	12 Months Ended
	Dec. 31, 2014
Payables and Accruals [Abstract]
Accounts Payable and Accrued Liabilities Disclosure [Text Block]	NOTE 5. Accrued Expenses
	Accrued expenses consist of the following (in thousands):
		Year Ended December 31,
		2014		2013
	Salaries, wages and employee benefits	$	7,043	$	4,747
	Federal and state tax accruals		186		2,576
	Other		1,023		1,409
	Total accrued expenses	$	8,252	$	8,732

Note_6_Longterm_Debt

Note 6 - Long-term Debt	12 Months Ended
	Dec. 31, 2014
Disclosure Text Block [Abstract]
Long-term Debt [Text Block]	NOTE 6. Long-term Debt
	Long-term debt consisted of the following (in thousands):
		Year Ended December 31,
		2014			2013
	Revolving credit agreement	$	71,000		$	64,000
	Other		896			1,023
	Total debt		71,896			65,023
	Less current maturities		(896	)		(1,023	)
	Long-term debt, less current maturities	$	71,000		$	64,000
	Credit Agreement
	In 2012, the Company entered into a $125.0 million revolving credit agreement with Wells Fargo Capital Finance, LLC, as Administrative Agent, and PNC Bank, which was set to expire in 2017, was collateralized by substantially all of the Company’s assets, and included letters of credit not to exceed $15.0 million. In addition, the facility had an accordion feature whereby the Company may have elected to increase the size of the facility by up to $50.0 million, subject to customary conditions and lender participation. The facility was 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 Company’s business assets (excluding tractors and trailers financed through capital leases and real estate). Proceeds were used to finance working capital, to fund capital expenditures and for general corporate purposes. The facility bore interest at rates typically based on the Wells Fargo prime rate or LIBOR, in each case, plus an applicable margin ranging from 2.25% to 2.75% based on average excess availability. The facility contained a minimum excess availability requirement equal to 15.0% of the maximum revolver amount ($18.8 million) and an annual capital expenditure limit ($73.5 million in 2014).
	Under the facility’s terms, the Company was 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 facility signed on March 14, 2014, and effective as of December 31, 2013), if a minimum suppressed availability threshold of $30.0 million was not maintained, the Company’s borrowing availability would have been reduced by the amount of the shortfall below $30.0 million. As of December 31, 2014, the Company’s suppressed availability was $31.6 million, which did not reduce the Company’s borrowing availability. The facility did not contain any financial maintenance covenants, but did contain certain restrictions and covenants relating to, among other things, dividends, liens, acquisitions and dispositions outside the ordinary course of business and affiliate transactions. The facility included usual and customary events of default for a credit facility of its nature.
	The Company had no overnight borrowings under the facility as of December 31, 2014. The average interest rate including all borrowings made under the facility as of December 31, 2014, was 3.1%. As debt is repriced on a monthly basis, the borrowings under the facility approximated fair value. As of December 31, 2014, the Company had $4.3 million in letters of credit outstanding and had $30.9 million available under the facility (net of the required minimum availability of approximately $18.8 million).
	The facility was terminated in February 2015. See “Item 8. Financial Statements and Supplementary Data – Note 15: Subsequent Events” in this Form 10-K for discussion of the Company’s new revolving credit facility.
	Other
	On October 1, 2014, the Company entered into an unsecured note payable of $1.4 million. The note, which is payable in monthly installments of principal and interest of approximately $0.1 million and bears interest at 2.4%, is scheduled to mature on September 30, 2015. The balance of the note payable as of December 31, 2014 was $0.9 million. The note is payable to a third party financing company for a portion of the Company’s annual insurance premiums.

Note_7_Leases_and_Commitments

Note 7 - Leases and Commitments	12 Months Ended
	Dec. 31, 2014
Leases [Abstract]
Leases of Lessee Disclosure [Text Block]	NOTE 7. Leases and Commitments
	Capital leases
	USA Truck leases certain equipment under capital leases with terms ranging from 15 to 60 months. Balances related to these capitalized leases are included in property and equipment in the accompanying consolidated balance sheets and are set forth in the table below for the periods indicated (in thousands).
		Capitalized Costs		Accumulated Amortization		Net Book Value
	31-Dec-14	$	75,188	$	27,770	$	47,418
	31-Dec-13		84,410		20,942		63,468
	The Company has capitalized lease obligations relating to revenue equipment in the amount of $45.3 million, of which $23.1 million represents the current portion. Such leases have various termination dates extending through August 2018 and contain renewal or fixed price purchase options. The effective interest rates on the leases range from 1.6% to 3.1% as of December 31, 2014. The lease agreements require payment of property taxes, maintenance and operating expenses. The Company has entered into various long-term financing agreements, of which approximately $0.3 million remains outstanding, for the purchases of information technology related hardware, which bear interest ranging from 3.1% to 4.5%. Amortization of capital leases was $12.7 million, $12.7 million and $10.7 million for the years ended December 31, 2014, 2013 and 2012, respectively.
	Operating leases
	Rent expense associated with operating leases was $5.3 million, $2.8 million, and $3.1 million for years ended December 31, 2014, 2013 and 2012, respectively. Rent expense relating to tractors, trailers and other operating equipment is included in operations and maintenance expense, while rent expense relating to office equipment is included in other operating expenses in the accompanying consolidated statements of operations and comprehensive income (loss).
	As of December 31, 2014, the Company has entered into leases with lessors who did not participate in the Company’s then-effective revolving credit facility. Currently, such leases do not contain cross-default provisions with such facility or with the Credit Facility.
	As of December 31, 2014, the future minimum payments under capitalized leases, which includes $1.5 million in interest, with initial terms of one year or more and future rentals under operating leases for certain facilities, office equipment and revenue equipment with initial terms of one year or more were as follows for the years indicated (in thousands).
		2015		2016		2017		2018		2019		Thereafter
	Future minimum payments	$	23,926	$	17,201	$	3,851	$	2,067	$	--	$	--
	Future rentals under operating leases		4,169		3,681		3,593		3,237		96		185
	Purchase commitments
	As of December 31, 2014, the Company had commitments outstanding to acquire revenue equipment of $19.6 million. The Company generally has the option to cancel revenue equipment orders within a 60 to 90 day period prior to scheduled production, although the notice period has lapsed for 100.0% of the commitments outstanding as of December 31, 2014.

Note_8_Federal_and_State_Incom

Note 8 - Federal and State Income Taxes	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Income Tax Disclosure [Text Block]	NOTE 8. Federal and State Income Taxes
	Significant components of the Company’s deferred tax assets and liabilities are as follows (dollar amounts in thousands):
		Year Ended December 31,
		2014			2013
	Current deferred tax assets:
	Accrued expenses not deductible until paid	$	7,805		$	7,648
	Net operating loss carry forwards		3,318			--
	Federal credits		1,556			--
	Equity incentive plan		184			282
	Revenue recognition		332			330
	Allowance for doubtful accounts		391			234
	Other		822			452
	Total current deferred tax assets		14,408			8,946
	Current deferred tax liabilities:
	Prepaid expenses deductible when paid		(6,701	)		(6,159	)
	Net current deferred tax assets (liabilities)	$	7,707		$	2,787
	Noncurrent deferred tax assets:
	Capital leases		70			--
	Non-compete agreement		--			18
	Net operating loss carry forwards		--			4,444
	Total noncurrent deferred tax assets		70			4,462
	Noncurrent deferred tax liabilities:
	Tax over book depreciation		(46,758	)		(41,041	)
	Capitalized leases		--			(71	)
	Other		--			3
	Total noncurrent deferred tax liabilities		(46,758	)		(41,109	)
	Net noncurrent deferred tax liabilities	$	(46,688	)	$	(36,647	)
	The Company has federal NOL carry forwards of approximately $8.5 million that will begin to expire in 2032. The Company also has certain state NOL carryovers that expire in varying years through 2033. In addition, the Company also has certain federal general business tax credits of $0.1 million, which will begin to expire in 2031 and federal alternative minimum tax credit carryovers of $1.4 million which have no expiration. The Company expects to fully utilize its tax attributes in future years before they expire.
	Significant components of the provision (benefit) for income taxes are as follows (in thousands):
		Year Ended December 31,
		2014			2013			2012
	Current:
	Federal	$	(129	)	$	786		$	--
	State		201			--			--
	Total current		72			786			--
	Deferred:
	Federal		5,246			(4,093	)		(7,943	)
	State		(125	)		(681	)		(1,646	)
	Total deferred		5,121			(4,774	)		(9,589	)
	Total income tax expense (benefit)	$	5,193		$	(3,988	)	$	(9,589	)
	The 2014 state deferred tax benefit of ($0.1) million includes a gross state deferred tax benefit of ($1.4) million related to adjusting the state deferred tax rate during the period, offset by $1.2 million of gross state deferred tax expense based on changes in state deferred tax assets and liabilities during the period.
	A reconciliation between the effective income tax rate and the statutory federal income tax rate (35% for 2014 and 34% for 2013 and 2012) is as follows (dollar amounts in thousands):
		Year Ended December 31,
		2014			2013			2012
	Income tax expense (benefit) at statutory federal rate	$	3,929		$	(4,453	)	$	(9,268	)
	Federal income tax effects of:
	State income tax (benefit) expense		(27	)		231			558
	Per diem and other nondeductible meals and entertainment		872			875			748
	Other		343			40			19
	Federal income tax expense (benefit)		5,117			(3,307	)		(7,943	)
	State income tax expense (benefit)		76			(681	)		(1,646	)
	Total income tax expense (benefit)	$	5,193		$	(3,988	)	$	(9,589	)
	Effective tax rate		46.3	%		30.4	%		35.2	%
	The effective rates varied from the statutory federal tax rate primarily due to state income taxes and certain non-deductible expenses including a per diem pay structure for drivers. Due to the partially nondeductible effect of per diem pay, the Company’s tax rate will fluctuate in future periods based on fluctuations in earnings and in the number of drivers who elect to receive this pay structure. Generally, as pre-tax income increases, the impact of the driver per diem program on our effective tax rate decreases, because aggregate per diem pay becomes smaller in relation to pre-tax income, while in periods where earnings are at or near breakeven the impact of the per diem program on our effective tax rate is significant.

Note_9_Equity_Compensation_and

Note 9 - Equity Compensation and Employee Benefit Plans	12 Months Ended
	Dec. 31, 2014
Compensation and Retirement Disclosure [Abstract]
Pension and Other Postretirement Benefits Disclosure [Text Block]	NOTE 9. Equity Compensation and Employee Benefit Plans
	The Company adopted the 2014 Omnibus Incentive Plan (the “Incentive Plan”) in May 2014. The Incentive Plan replaced the 2004 Equity Incentive Plan and provides for the granting of equity-based awards covering up to 500,000 shares of common stock to directors, officers and other key employees and consultants, in addition to the shares outstanding at execution of agreement. As of December 31, 2014, 480,354 shares remain available for the issuance of future equity-based compensation awards.
	The components of compensation expense recognized, net of forfeiture recoveries, related to equity-based compensation is reflected in the table below for the years indicated (in thousands):
			Year Ended December 31,
			2014			2013			2012
	Stock options		$	31		$	54		$	67
	Restricted stock awards			335			162			64
	Equity compensation expense		$	366		$	216		$	131
	Compensation expense related to all equity-based compensation awards granted under the Incentive Plan is included in salaries, wages and employee benefits in the accompanying consolidated statements of operations and comprehensive income (loss).
	Stock Options
	Stock options are the contingent right of award holders to purchase shares of the Company’s common stock at a stated price for a limited time. The fair value of each option award is estimated on the date of grant using the Black-Scholes-Merton option-pricing formula, and is recognized over the vesting period of the award. The vesting period of option awards is generally 3 or 4 years and awards may be exercised over a three or ten year term. The Company did not grant any stock options in 2014. The following assumptions were used to value the stock options granted during the years indicated:
			Year Ended December 31,
			2013			2012
	Dividend yield			0	%		0	%
	Expected volatility			35.6	%		29.8 – 64.0	%
	Risk-free interest rate			1.2	%		0.5 – 0.7	%
	Expected life (in years)			6.25			3.75 – 4.25
	The expected volatility is a measure of the expected fluctuation in the Company’s share price based on the historical volatility of the Company’s stock. Expected life represents the length of time an option contract is anticipated to be outstanding before being exercised. The risk-free interest rate is based on an implied yield on United States zero-coupon treasury bonds with a remaining term equal to the expected life of the outstanding options. In addition to the above, a factor for anticipated forfeitures is also included, which represents the number of shares under options expected to be forfeited over the expected life of the options.
	The following table summarizes the stock option activity under the Incentive Plan:
			Number of Shares			Weighted-Average Exercise Price Per Share			Weighted-Average Remaining Contractual Life		Aggregate Intrinsic Value
									(in years)		(in thousands) (1)
	Options outstanding - beginning of year			109,871		$	9.49
	Granted (2)			--			--
	Exercised			(28,884	)		12.41				$	131
	Cancelled/forfeited			(16,137	)		15.82
	Expired			(214	)		11.73
	Outstanding at December 31, 2014 (3)			64,636		$	6.6			6.01	$	1,332
	Exercisable at December 31, 2014			28,671		$	8.59			3.97	$	534
		-1	The intrinsic value of a stock option is the amount by which the market value of the underlying stock exceeds the exercise price of the option. The per share market value of the Company’s common stock, as determined by the closing price on December 31, 2014, was $28.40.
		-2	The weighted-average grant date fair value of options granted during 2014, 2013 and 2012 was zero, $1.75 and $2.43, respectively.
		-3	The exercise prices of outstanding options granted range from $2.88 to $18.58 as of December 31, 2014.
	As of December 31, 2014, approximately $12,500 of unrecognized compensation cost related to nonvested stock options is expected to be recognized over a weighted-average period of 2.6 years.
	Restricted Stock Awards
	Restricted stock awards are shares of the Company’s common stock that are granted subject to defined restrictions. The estimated fair value of restricted stock awards is based upon the closing price of the Company’s common stock on the date of grant. The vesting period of restricted stock awards is generally ratably over four years.
	Information related to the restricted stock awarded for the year ended December 31, 2014, is as follows:
			Number			Weighted-Average Grant
			of Shares			Date Fair Value (1)
	Nonvested shares – December 31, 2013			199,619		$	7.2
	Granted			20,851			16.6
	Forfeited			(35,140	)		10.74
	Vested			(60,486	)		5.68
	Nonvested shares – December 31, 2014			124,844		$	8.51
		-1	The shares were valued at the closing price of the Company’s common stock on the dates of the awards.
	The fair value of stock options and restricted stock that vested during the year is as follows for the years indicated (in thousands).
			Year Ended December 31,
			2014			2013			2012
	Stock options		$	49		$	60		$	177
	Restricted stock			931			144			57
	As of December 31, 2014, approximately $425,000 of unrecognized compensation cost related to nonvested restricted stock awards is expected to be recognized over a weighted-average period of 2.3 years.
	Employee Benefit Plans
	The Company sponsors the USA Truck, Inc. Employees’ Investment Plan, a tax deferred savings plan under section 401(k) of the Internal Revenue Code that covers substantially all team members. Team members can contribute up to 50.0% of their compensation, subject to statutory limits.

Note_10_Earnings_Loss_Per_Shar

Note 10 - Earnings (Loss) Per Share	12 Months Ended
	Dec. 31, 2014
Earnings Per Share [Abstract]
Earnings Per Share [Text Block]	NOTE 10. Earnings (loss) per share
	The following table sets forth the computation of basic and diluted earnings (loss) per share (in thousands, except per share amounts):
		Year Ended December 31,
		2014		2013			2012
	Numerator:
	Net income (loss)	$	6,033	$	(9,110	)	$	(17,671	)
	Denominator:
	Denominator for basic earnings (loss) per share – weighted-average shares		10,356		10,323			10,310
	Effect of dilutive securities:
	Employee stock options and restricted stock		129		--			--
	Denominator for diluted earnings (loss) per share – adjusted weighted-average shares and assumed conversions	$	10,485	$	10,323		$	10,310
	Basic earnings (loss) per share	$	0.58	$	(0.88	)	$	(1.71	)
	Diluted earnings (loss) per share	$	0.58	$	(0.88	)	$	(1.71	)
	Weighted-average anti-dilutive employee stock options and restricted stock		3		103			200

Note_11_Litigation

Note 11 - Litigation	12 Months Ended
	Dec. 31, 2014
Disclosure Text Block Supplement [Abstract]
Legal Matters and Contingencies [Text Block]	NOTE 11. Litigation
	USA Truck is party to routine litigation incidental to its business, primarily involving claims for personal injury and property damage incurred in the transportation of freight. The Company maintains insurance to cover liabilities in excess of certain self-insured retention levels. It is the opinion of management that adverse results of one or more of these claims should not have a material adverse effect on the Company’s consolidated financial statements.

Note_12_Stockholder_Rights_Pla

Note 12 - Stockholder Rights Plan	12 Months Ended
	Dec. 31, 2014
Disclosure Text Block Supplement [Abstract]
Preferred Stock [Text Block]	NOTE 12. Stockholder Rights Plan
	In November 2012, the Board of Directors adopted a rights plan. Pursuant to the rights plan, if a person or group (an “acquiring person”), without approval of the Board of Directors and subject to customary exceptions, acquired 15% or more of the Company’s common stock or launched a tender offer that, if consummated, would result in them becoming an acquiring person, each holder of a right (except the acquiring person), would have the right to purchase from the Company shares of common stock at the price specified in the rights plan.
	In April 2014, the Board of Directors unanimously voted to terminate the rights plan effective April 11, 2014.

Note_13_Quarterly_Results_of_O

Note 13 - Quarterly Results of Operations (Unaudited)	12 Months Ended
	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Information [Text Block]	NOTE 13. Quarterly Results of Operations (Unaudited)
	The tables below present quarterly financial information for 2014 and 2013 (in thousands, except per share amounts):
		2014
		March 31,			June 30,			September 30,			December 31,
	Operating revenue	$	145,489		$	153,298		$	153,618		$	150,072
	Operating expenses		146,532			149,041			148,199			141,462
	Operating income (loss)		(1,043	)		4,257			5,419			8,610
	Other, net		1,140			2,891			885			1,101
	Income (loss) before income taxes		(2,183	)		1,366			4,534			7,509
	Income tax expense (benefit)		(594	)		644			1,817			3,326
	Net income (loss)	$	(1,589	)	$	722		$	2,717		$	4,183
	Average shares outstanding (basic)		10,339			10,346			10,357			10,374
	Basic earnings (loss) per share	$	(0.15	)	$	0.07		$	0.26		$	0.4
	Average shares outstanding (diluted)		10,339			10,478			10,476			10,492
	Diluted earnings (loss) per share	$	(0.15	)	$	0.07		$	0.26		$	0.4
		2013
		March 31,			June 30,			September 30,			December 31,
	Operating revenue	$	132,027		$	139,738		$	141,822		$	141,417
	Operating expenses		134,854			140,683			142,026			146,109
	Operating income (loss)		(2,827	)		(945	)		(204	)		(4,692	)
	Other, net		783			901			356			2,390
	Income (loss) before income taxes		(3,610	)		(1,846	)		(560	)		(7,082	)
	Income tax expense (benefit)		(1,136	)		(448	)		42			(2,446	)
	Net income (loss)	$	(2,474	)	$	(1,398	)	$	(602	)	$	(4,636	)
	Average shares outstanding (basic)		10,305			10,293			10,322			10,323
	Basic earnings (loss) per share	$	(0.24	)	$	(0.14	)	$	(0.06	)	$	(0.45	)
	Average shares outstanding (diluted)		10,305			10,293			10,322			10,323
	Diluted earnings (loss) per share	$	(0.24	)	$	(0.14	)	$	(0.06	)	$	(0.45	)
	The amounts reported above have been previously reported in the Company’s quarterly reports on Form 10-Q. Certain line items in those quarterly reports may not total the corresponding amount reported in this Form 10-K due to rounding.

Note_14_Revision_of_Prior_Peri

Note 14 - Revision of Prior Period Results	12 Months Ended
	Dec. 31, 2014
Accounting Changes and Error Corrections [Abstract]
Accounting Changes and Error Corrections [Text Block]	NOTE 14. Revision of Prior Period Results
	During the first quarter of 2014, in connection with recording the increase in the Company's federal income tax rate to the minimum statutory rate of 35%, the Company performed an in-depth review of the Company's income tax liabilities, including a roll-forward of NOLs. In preparing this roll-forward, an error was identified for 2009 related to the calculation of the deferred income tax asset for tax net NOLs. The error resulted in an approximate $1.6 million understatement of the net deferred tax liability and overstatement of retained earnings and stockholders' equity at December 31, 2009, and all subsequent periods through December 31, 2013.
	Pursuant to guidance in the SEC's Staff Accounting Bulletin 99, the Company concluded that the error was not material to any of its prior period financial statements. In accordance with the SEC's Staff Accounting Bulletin 108, the immaterial error was corrected by revising the previously issued December 31, 2013 consolidated balance sheet included in this document to facilitate comparability between current and prior year periods. During 2014, to ensure its disclosure controls and procedures continued to be effective, management conducted an assessment of all current and deferred tax balance sheet accounts and performed detailed reconciliations at each balance sheet date to ensure all federal and state tax net operating loss carry forwards and other components of the calculation were properly stated.
	Based upon the Company's review of the factors noted above, management concluded the error was indicative of a control deficiency within its internal control over financial reporting. The Company considered the magnitude of the potential misstatement and whether there was a reasonable possibility that our controls would fail to prevent, or detect and correct, a material misstatement of an account balance or disclosure. The Company considered the definitions of deficiency classifications and indicators of material weakness in internal control over financial reporting as outlined by the Public Company Accounting Oversight Board's Auditing Standards No. 5. Per this standard, indicators of material weaknesses in internal control over financial reporting include (1) identification of fraud, whether or not material, on the part of senior management; (2) restatement of previously issued financial statements to reflect the correction of a material misstatement; (3) identification by the auditor of a material misstatement of financial statements in the current period in circumstances that indicate that the misstatement would not have been detected by the Company's internal control over financial reporting; and (4) ineffective oversight of the Company's external financial reporting and internal control over financial reporting by the Company's audit committee. None of these indicators of material weakness are present in the Company. The Company, through existing controls, identified the potential error before it became material and promptly brought it to the attention of the external auditors and the Company's Audit Committee, and the error did not materially impact the financial information previously reported in the Company's Annual Report on Form 10-K for 2009 and all subsequent periods through 2013.
	Going forward, in conjunction with our third-party tax advisor, management will perform such assessment and reconciliations quarterly and the Company's Controller and Chief Financial Officer will be responsible for reviewing and approving the accuracy and adequacy of all tax accounts.
	The effect of this revision on the line items within the Company's consolidated balance sheet is as follows (in thousands):
		31-Dec-13
		As Reported		Revisions			As Revised
	Deferred Income Tax Liability	$	35,039	$	1,608		$	36,647
	Retained Earnings		56,657		(1,608	)		55,049
	Total Stockholders’ Equity		100,538		(1,608	)		98,930

Note_15_Subsequent_Events

Note 15 - Subsequent Events	12 Months Ended
	Dec. 31, 2014
Subsequent Events [Abstract]
Subsequent Events [Text Block]	NOTE 15. Subsequent Events
	In February 2015, the Company entered into a new senior secured revolving credit facility (the “Credit Facility”) with a group of lenders and Bank of America, N.A., as agent (“Agent”). Contemporaneously with the funding of the Credit Facility, the Company paid off the obligations under its prior credit facility and terminated such facility.
	The Credit Facility is structured as a $170.0 million revolving credit facility, with an accordion feature that, so long as no event of default exists, allows the Company to request an increase in the revolving credit facility of up to $80.0 million, exercisable in increments of $20.0 million. The Credit Facility is a five-year facility scheduled to terminate on February 5, 2020. Borrowings under the Credit Facility are classified as either "base rate loans" or "LIBOR loans". Base rate loans accrue interest at a base rate equal to the Agent's prime rate plus an applicable margin that is set at 0.50% through May 31, 2016 and adjusted quarterly thereafter between 0.25% and 1.00% based on the Company’s consolidated fixed charge coverage ratio. LIBOR loans accrue interest at LIBOR plus an applicable margin that is set at 1.50% through May 31, 2016 and adjusted quarterly thereafter between 1.25% and 2.00% based on the Company’s consolidated fixed charge coverage ratio. The Credit Facility includes, within its $170.0 million revolving credit facility, a letter of credit sub-facility in an aggregate amount of $15.0 million and a swing line sub-facility in an aggregate amount of $20.0 million. An unused line fee of 0.25% is applied to the average daily amount by which the lenders’ aggregate revolving commitments exceed the outstanding principal amount of revolver loans and the aggregate undrawn amount of all outstanding letters of credit issued under the Credit Facility. The Credit Facility is secured by a pledge of substantially all of the Company's assets, with the notable exclusion of any real estate or revenue equipment financed outside the Credit Facility. Additionally, the Company will take a charge in the first quarter of 2015 of $0.8 million resulting from the replacement of the Credit Facility representing the write-off of the unamortized deferred financing fees associated with the previous credit facility.
	Borrowings under the Credit Facility are subject to a borrowing base limited to the lesser of (A) $170.0 million; or (B) the sum of (i) 90% of eligible investment grade accounts receivable (reduced to 85% in certain situations), plus (ii) 85% of eligible non-investment grade accounts receivable, plus (iii) the lesser of (a) 85% of eligible unbilled accounts receivable and (b) $10.0 million, plus (iv) the product of 85% multiplied by the net orderly liquidation value percentage applied to the net book value of eligible revenue equipment, plus (v) 85% multiplied the net book value of otherwise eligible newly acquired revenue equipment that has not yet been subject to an appraisal. The borrowing base is reduced by an availability reserve, including reserves based on dilution and certain other customary reserves. The Credit Facility contains a single springing financial covenant, which requires a consolidated fixed charge coverage ratio of at least 1.0 to 1.0. The financial covenant springs only in the event excess availability under the Credit Facility drops below 10% of the lenders’ total commitments under the Credit Facility.
	The Credit Facility 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 Facility may be accelerated, and the lenders’ commitments may be terminated. The Credit Facility contains certain restrictions and covenants relating to, among other things, dividends, liens, acquisitions and dispositions, affiliate transactions, and other indebtedness.
	This description of the Credit Facility does not purport to be complete and is qualified in its entirety by reference to the full text of the Credit Facility, which will be filed with the Company's Form 10-Q for the quarter ending March 31, 2015.

Accounting_Policies_by_Policy_

Accounting Policies, by Policy (Policies)	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Basis of Accounting, Policy [Policy Text Block]	Description of business
	USA Truck, Inc., a Delaware corporation (the “Company”) is a truckload carrier providing transportation of general commodities throughout the continental United States and into and out of portions of Mexico and Canada. Generally, the Company transports full dry van trailer loads of freight from origin to destination without intermediate stops or handling. As a complement to the Company’s truckload operations, it also provides dedicated, brokerage and rail intermodal services. For shipments into Mexico, the Company transfers its trailers to tractors operated by Mexican carriers at a facility in Laredo, Texas, which is operated by the Company’s wholly owned subsidiary. Through the Company’s asset based and non-asset based capabilities, it transports many types of freight for a diverse customer base in a variety of industries.
	Basis of presentation
	The accompanying consolidated financial statements include the accounts of USA Truck and its wholly owned subsidiary. All significant intercompany balances and transactions have been eliminated in preparing the consolidated financial statements. Certain amounts reported in prior periods have been reclassified to conform to the current year presentation.
	In the opinion of management, the accompanying financial statements have been prepared in accordance with United States generally accepted accounting principles (“GAAP”), and include all adjustments necessary for the fair presentation of the periods presented. Management has evaluated the effect on the Company’s reported financial condition and results of operations of events subsequent to December 31, 2014 through the issuance of the financial statements.
Use of Estimates, Policy [Policy Text Block]	Use of estimates
	The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Some of the significant estimates made by management include, but are not limited to, allowances for doubtful accounts, useful lives for depreciation and amortization, estimates related to the Company’s share-based compensation plan, deferred taxes and reserves for claims liabilities. Management evaluates its estimates and assumptions on an ongoing basis using historical experience and other factors (including, but not limited to, the current economic environment), which management believes to be reasonable under the circumstances. Management adjusts such estimates and assumptions when facts and circumstances dictate. As future events and their effects cannot be determined with precision, actual results could differ significantly from these estimates.
Cash and Cash Equivalents, Policy [Policy Text Block]	Cash equivalents
	The Company considers all highly liquid investments with a maturity of three months or less when purchased to be cash equivalents. The carrying amount reported in the balance sheet for cash and cash equivalents approximates its fair value.
Receivables, Policy [Policy Text Block]	Accounts receivable and concentration of credit risk
	Trade accounts receivable are recorded at their invoiced amounts, net of allowance for doubtful accounts. The allowance for doubtful accounts is management’s estimate of the amount of probable credit losses and revenue adjustments in the Company’s existing accounts receivable. Management reviews the financial condition of customers for granting credit and determines the allowance based on analysis of individual customers’ financial condition, historical write-off experience and national economic conditions. The Company evaluates the adequacy of its allowance for doubtful accounts quarterly. Past due balances over 90 days and exceeding a specified amount are reviewed individually for collectability. Account balances are charged off against the allowance after all means of collection have been exhausted and the potential for recovery is considered remote. The Company does not have any off-balance-sheet credit exposure related to its customers. The carrying amount reported in the consolidated balance sheets for accounts receivable approximates fair value as receivables collection averaged approximately 44 days from the billing date.
	The following table provides a summary of the accounts receivable for the periods indicated (in thousands):
		Year Ended December 31,
		2014			2013
	Trade customers	$	72,206		$	65,292
	Other		5,639			3,463
	Total accounts receivable		77,845			68,755
	Less: Allowance for doubtful accounts		(1,020	)		(610	)
	Accounts receivable, net	$	76,825		$	68,145
	The following table provides a summary of the activity in the allowance for doubtful accounts for 2014, 2013 and 2012 (in thousands):
		Year Ended December 31,
		2014			2013			2012
	Balance at beginning of year	$	610		$	423		$	420
	Provision for doubtful accounts		782			187			153
	Uncollectible accounts written off, net of recovery		(372	)		--			(150	)
	Balance at end of year	$	1,020		$	610		$	423
Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block]	Assets held for sale
	Assets held for sale are comprised of revenue equipment not being utilized in operations and are carried at the lower of depreciated cost or estimated fair value less expected selling costs when the required criteria, as defined by ASC Topic 360 “Property, Plant and Equipment” are satisfied. Depreciation ceases on the date that the held for sale criteria are met. The Company expects to sell these assets within the next twelve months.
Inventory, Policy [Policy Text Block]	Inventories
	Inventories consist of tires, fuel, supplies and Company store merchandise and are stated at the lower of cost (first-in, first-out basis) or market.
Property, Plant and Equipment, Policy [Policy Text Block]	Property and equipment
	Property and equipment is capitalized at cost. The cost of such property is depreciated by the straight-line method using the following estimated useful lives: structures – 5 to 39.5 years; revenue equipment – 4 to 14 years; and service, office and other equipment – 3 to 20 years. Revenue equipment acquired under capital lease is amortized over the lease term. Trade-in allowances in excess of book value of revenue equipment are accounted for by adjusting the cost of assets acquired. Tires purchased with revenue equipment as well as replacement tires are amortized under the Company’s prepaid tire policy.
	The Company reviews its long-lived assets for impairment whenever events or circumstances indicate the carrying amount of a long-lived asset may not be recoverable. An impairment loss would be recognized if the carrying amount of the long-lived asset is not recoverable and the carrying amount exceeds its fair value. For long-lived assets classified as held and used, the carrying amount is not recoverable when the carrying value of the long-lived asset exceeds the sum of the future net cash flows.
Income Tax, Policy [Policy Text Block]	Income taxes
	Deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the tax basis amounts for income tax purposes. Significant components of the Company’s deferred tax liabilities and assets include temporary differences relating to depreciation, capitalized leases and certain prepaid and accrued expenses. The Company has analyzed filing positions in its federal and applicable state tax returns in all open tax years. In general, the Company’s 2009 through 2014 tax returns are subject to adjustment. Because the Company had generated net operating losses (“NOLs”) in prior years, the federal and applicable state statute of limitations remains open beyond the normal three-year period to extent of its NOL carry forwards, which may be adjusted until the tax year in which the NOLs are utilized has expired. In 2014, the IRS completed its examination of the 2011 federal income tax return. No meaningful adjustments were identified. The Company’s policy is to recognize interest related to unrecognized tax benefits as interest expense and penalties as operating expenses. The Company believes that its income tax filing positions and deductions will be sustained on audit and does not anticipate any adjustments that will result in a material change to its consolidated financial position, results of operations and cash flows. Therefore, no reserves for uncertain income tax positions or associated interest or penalties on uncertain tax positions have been recorded.
Self Insurance Reserve [Policy Text Block]	Claims accruals
	The primary claims arising against the Company consist of cargo, liability, personal injury, property damage, workers' compensation, and employee medical expenses. The Company’s insurance program involves self-insurance with high risk retention levels. Due to its significant self-insured retention amounts, the Company has exposure to fluctuations in the number and severity of claims and to variations between its estimated and actual ultimate payouts. The Company accrues the estimated cost of the uninsured portion of pending claims and an estimate for allocated loss adjustment expenses including legal and other direct costs associated with a claim. Estimates require judgments concerning the nature and severity of the claim, historical trends, advice from third-party administrators and insurers, the size of any potential damage award based on factors such as the specific facts of individual cases, the jurisdictions involved, the prospect of punitive damages, future medical costs, and inflation estimates of future claims development, and the legal and other costs to settle or defend the claims. USA Truck has significant exposure to fluctuations in the number and severity of claims. If there is an increase in the frequency and severity of claims, or the Company is required to accrue or pay additional amounts if the claims prove to be more severe than originally assessed, or any of the claims would exceed the limits of its insurance coverage, its profitability could be adversely affected.
Earnings Per Share, Policy [Policy Text Block]	Earnings (loss) per share
	Basic earnings (loss) per share is computed based on the weighted-average number of shares of common stock outstanding during the year. Diluted earnings (loss) per share is computed by adjusting the weighted-average shares outstanding by common stock equivalents attributable to dilutive stock options and restricted stock.
Revenue Recognition, Policy [Policy Text Block]	Revenue recognition
	Revenue generated by the Company’s trucking operating segment is recognized in full upon completion of delivery of freight to the receiver’s location. For freight in transit at the end of a reporting period, the Company recognizes revenue pro rata based on relative transit time completed as a portion of the estimated total transit time. Expenses are recognized as incurred.
	Revenue generated by the Company’s SCS segment is recognized upon completion of the services provided. Revenue is recorded on a gross basis, without deducting third party purchased transportation costs, because the Company acts as a principal with substantial risks as primary obligor.
	Management believes these policies most accurately reflect revenue as earned and direct expenses, including third party purchased transportation costs, as incurred.
New Accounting Pronouncements, Policy [Policy Text Block]	New accounting pronouncements
	In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update No. 2014-09, Revenue from Contracts with Customers (“ASU 2014-09”), which supersedes nearly all existing revenue recognition guidance under GAAP. The core principle of ASU 2014-09 is to recognize revenue when promised goods or services are transferred to customers in an amount that reflects the consideration to which an entity expects to be entitled for those goods or services. ASU 2014-09 defines a five step process to implement this core principle and, in doing so, more judgment and estimates may be required within the revenue recognition process than are required under existing GAAP.
	The standard is effective for annual periods beginning after December 15, 2016, and interim periods therein, using either of the following transition methods: (i) a full retrospective approach reflecting the application of the standard in each prior reporting period with the option to elect certain practical expedients, or (ii) a retrospective approach with the cumulative effect of initially adopting ASU 2014-09 recognized at the date of adoption (which includes additional footnote disclosures). Management is currently evaluating the impact of the pending adoption of ASU 2014-09 on the Company’s consolidated financial statements and has not yet determined the method by which the Company will adopt the standard in its 2017 fiscal year.
	In August 2014, the FASB issued ASU No. 2014-15, Disclosure of Uncertainties about an Entity's Ability to Continue as a Going Concern, which requires an entity to evaluate whether conditions or events, in the aggregate, raise substantial doubt about the entity's ability to continue as a going concern for one year from the date the financial statements are issued or are available to be issued. The guidance will become effective January 1, 2017. The adoption of ASU 2014-15 is not expected to have an impact on the Company’s consolidated financial statements.

Note_1_Description_of_Business1

Note 1 - Description of Business and Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2014
Disclosure Text Block [Abstract]
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]		Year Ended December 31,
		2014			2013
	Trade customers	$	72,206		$	65,292
	Other		5,639			3,463
	Total accounts receivable		77,845			68,755
	Less: Allowance for doubtful accounts		(1,020	)		(610	)
	Accounts receivable, net	$	76,825		$	68,145
Allowance for Credit Losses on Financing Receivables [Table Text Block]		Year Ended December 31,
		2014			2013			2012
	Balance at beginning of year	$	610		$	423		$	420
	Provision for doubtful accounts		782			187			153
	Uncollectible accounts written off, net of recovery		(372	)		--			(150	)
	Balance at end of year	$	1,020		$	610		$	423

Note_2_Segment_Reporting_Table

Note 2 - Segment Reporting (Tables)	12 Months Ended
	Dec. 31, 2014
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment [Table Text Block]		Year Ended December 31,
		2014			2013			2012
	Operating revenue:
	Trucking revenue (1)	$	424,082		$	418,601		$	381,569
	Trucking intersegment eliminations		(587	)		(486	)		(24	)
	Trucking operating revenue		423,495			418,115			381,545
	SCS revenue		192,924			146,492			156,349
	SCS intersegment eliminations		(13,942	)		(9,602	)		(25,466	)
	SCS operating revenue		178,982			136,890			130,883
	Total operating revenue	$	602,477		$	555,005		$	512,428
		Year Ended December 31,
		2014			2013			2012
	Operating income (loss):
	Trucking	$	(3,532	)	$	(17,667	)	$	(29,843	)
	SCS		20,775			9,000			6,571
	Total operating income (loss)	$	17,243		$	(8,667	)	$	(23,272	)
		Year Ended December 31,
		2014			2013			2012
	Depreciation and amortization:
	Trucking	$	43,648		$	44,697		$	44,558
	SCS		182			250			500
	Total depreciation and amortization	$	43,830		$	44,947		$	45,058

Note_3_Prepaid_and_Other_Curre1

Note 3 - Prepaid and Other Current Assets (Tables)	12 Months Ended
	Dec. 31, 2014
Disclosure Text Block Supplement [Abstract]
Schedule of Other Current Assets [Table Text Block]		Year Ended December 31,
		2014		2013
	Prepaid tires	$	12,121	$	10,607
	Prepaid licenses, permits and tolls		1,923		1,915
	Prepaid insurance		1,166		1,414
	Other		2,108		2,128
	Total prepaid expenses and other current assets	$	17,318	$	16,064

Note_5_Accrued_Expenses_Tables

Note 5 - Accrued Expenses (Tables)	12 Months Ended
	Dec. 31, 2014
Payables and Accruals [Abstract]
Schedule of Accrued Liabilities [Table Text Block]		Year Ended December 31,
		2014		2013
	Salaries, wages and employee benefits	$	7,043	$	4,747
	Federal and state tax accruals		186		2,576
	Other		1,023		1,409
	Total accrued expenses	$	8,252	$	8,732

Note_6_Longterm_Debt_Tables

Note 6 - Long-term Debt (Tables)	12 Months Ended
	Dec. 31, 2014
Disclosure Text Block [Abstract]
Schedule of Long-term Debt Instruments [Table Text Block]		Year Ended December 31,
		2014			2013
	Revolving credit agreement	$	71,000		$	64,000
	Other		896			1,023
	Total debt		71,896			65,023
	Less current maturities		(896	)		(1,023	)
	Long-term debt, less current maturities	$	71,000		$	64,000

Note_7_Leases_and_Commitments_

Note 7 - Leases and Commitments (Tables)	12 Months Ended
	Dec. 31, 2014
Leases [Abstract]
Schedule of Capital Leased Assets [Table Text Block]		Capitalized Costs		Accumulated Amortization		Net Book Value
	31-Dec-14	$	75,188	$	27,770	$	47,418
	31-Dec-13		84,410		20,942		63,468
Schedule of Future Minimum Lease Payments for Capital Leases [Table Text Block]
		2015		2016		2017		2018		2019		Thereafter
	Future minimum payments	$	23,926	$	17,201	$	3,851	$	2,067	$	--	$	--
	Future rentals under operating leases		4,169		3,681		3,593		3,237		96		185

Note_8_Federal_and_State_Incom1

Note 8 - Federal and State Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]		Year Ended December 31,
		2014			2013
	Current deferred tax assets:
	Accrued expenses not deductible until paid	$	7,805		$	7,648
	Net operating loss carry forwards		3,318			--
	Federal credits		1,556			--
	Equity incentive plan		184			282
	Revenue recognition		332			330
	Allowance for doubtful accounts		391			234
	Other		822			452
	Total current deferred tax assets		14,408			8,946
	Current deferred tax liabilities:
	Prepaid expenses deductible when paid		(6,701	)		(6,159	)
	Net current deferred tax assets (liabilities)	$	7,707		$	2,787
	Noncurrent deferred tax assets:
	Capital leases		70			--
	Non-compete agreement		--			18
	Net operating loss carry forwards		--			4,444
	Total noncurrent deferred tax assets		70			4,462
	Noncurrent deferred tax liabilities:
	Tax over book depreciation		(46,758	)		(41,041	)
	Capitalized leases		--			(71	)
	Other		--			3
	Total noncurrent deferred tax liabilities		(46,758	)		(41,109	)
	Net noncurrent deferred tax liabilities	$	(46,688	)	$	(36,647	)
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]		Year Ended December 31,
		2014			2013			2012
	Current:
	Federal	$	(129	)	$	786		$	--
	State		201			--			--
	Total current		72			786			--
	Deferred:
	Federal		5,246			(4,093	)		(7,943	)
	State		(125	)		(681	)		(1,646	)
	Total deferred		5,121			(4,774	)		(9,589	)
	Total income tax expense (benefit)	$	5,193		$	(3,988	)	$	(9,589	)
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]		Year Ended December 31,
		2014			2013			2012
	Income tax expense (benefit) at statutory federal rate	$	3,929		$	(4,453	)	$	(9,268	)
	Federal income tax effects of:
	State income tax (benefit) expense		(27	)		231			558
	Per diem and other nondeductible meals and entertainment		872			875			748
	Other		343			40			19
	Federal income tax expense (benefit)		5,117			(3,307	)		(7,943	)
	State income tax expense (benefit)		76			(681	)		(1,646	)
	Total income tax expense (benefit)	$	5,193		$	(3,988	)	$	(9,589	)
	Effective tax rate		46.3	%		30.4	%		35.2	%

Note_9_Equity_Compensation_and1

Note 9 - Equity Compensation and Employee Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2014
Compensation and Retirement Disclosure [Abstract]
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block]		Year Ended December 31,
		2014			2013			2012
	Stock options	$	31		$	54		$	67
	Restricted stock awards		335			162			64
	Equity compensation expense	$	366		$	216		$	131
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]		Year Ended December 31,
		2013			2012
	Dividend yield		0	%		0	%
	Expected volatility		35.6	%		29.8 – 64.0	%
	Risk-free interest rate		1.2	%		0.5 – 0.7	%
	Expected life (in years)		6.25			3.75 – 4.25
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]		Number of Shares			Weighted-Average Exercise Price Per Share			Weighted-Average Remaining Contractual Life		Aggregate Intrinsic Value
								(in years)		(in thousands) (1)
	Options outstanding - beginning of year		109,871		$	9.49
	Granted (2)		--			--
	Exercised		(28,884	)		12.41				$	131
	Cancelled/forfeited		(16,137	)		15.82
	Expired		(214	)		11.73
	Outstanding at December 31, 2014 (3)		64,636		$	6.6			6.01	$	1,332
	Exercisable at December 31, 2014		28,671		$	8.59			3.97	$	534
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]		Number			Weighted-Average Grant
		of Shares			Date Fair Value (1)
	Nonvested shares – December 31, 2013		199,619		$	7.2
	Granted		20,851			16.6
	Forfeited		(35,140	)		10.74
	Vested		(60,486	)		5.68
	Nonvested shares – December 31, 2014		124,844		$	8.51
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable [Table Text Block]		Year Ended December 31,
		2014			2013			2012
	Stock options	$	49		$	60		$	177
	Restricted stock		931			144			57

Note_10_Earnings_Loss_Per_Shar1

Note 10 - Earnings (Loss) Per Share (Tables)	12 Months Ended
	Dec. 31, 2014
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]		Year Ended December 31,
		2014		2013			2012
	Numerator:
	Net income (loss)	$	6,033	$	(9,110	)	$	(17,671	)
	Denominator:
	Denominator for basic earnings (loss) per share – weighted-average shares		10,356		10,323			10,310
	Effect of dilutive securities:
	Employee stock options and restricted stock		129		--			--
	Denominator for diluted earnings (loss) per share – adjusted weighted-average shares and assumed conversions	$	10,485	$	10,323		$	10,310
	Basic earnings (loss) per share	$	0.58	$	(0.88	)	$	(1.71	)
	Diluted earnings (loss) per share	$	0.58	$	(0.88	)	$	(1.71	)
	Weighted-average anti-dilutive employee stock options and restricted stock		3		103			200

Note_13_Quarterly_Results_of_O1

Note 13 - Quarterly Results of Operations (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Schedule of Quarterly Financial Information [Table Text Block]		2014
		March 31,			June 30,			September 30,			December 31,
	Operating revenue	$	145,489		$	153,298		$	153,618		$	150,072
	Operating expenses		146,532			149,041			148,199			141,462
	Operating income (loss)		(1,043	)		4,257			5,419			8,610
	Other, net		1,140			2,891			885			1,101
	Income (loss) before income taxes		(2,183	)		1,366			4,534			7,509
	Income tax expense (benefit)		(594	)		644			1,817			3,326
	Net income (loss)	$	(1,589	)	$	722		$	2,717		$	4,183
	Average shares outstanding (basic)		10,339			10,346			10,357			10,374
	Basic earnings (loss) per share	$	(0.15	)	$	0.07		$	0.26		$	0.4
	Average shares outstanding (diluted)		10,339			10,478			10,476			10,492
	Diluted earnings (loss) per share	$	(0.15	)	$	0.07		$	0.26		$	0.4
		2013
		March 31,			June 30,			September 30,			December 31,
	Operating revenue	$	132,027		$	139,738		$	141,822		$	141,417
	Operating expenses		134,854			140,683			142,026			146,109
	Operating income (loss)		(2,827	)		(945	)		(204	)		(4,692	)
	Other, net		783			901			356			2,390
	Income (loss) before income taxes		(3,610	)		(1,846	)		(560	)		(7,082	)
	Income tax expense (benefit)		(1,136	)		(448	)		42			(2,446	)
	Net income (loss)	$	(2,474	)	$	(1,398	)	$	(602	)	$	(4,636	)
	Average shares outstanding (basic)		10,305			10,293			10,322			10,323
	Basic earnings (loss) per share	$	(0.24	)	$	(0.14	)	$	(0.06	)	$	(0.45	)
	Average shares outstanding (diluted)		10,305			10,293			10,322			10,323
	Diluted earnings (loss) per share	$	(0.24	)	$	(0.14	)	$	(0.06	)	$	(0.45	)

Note_14_Revision_of_Prior_Peri1

Note 14 - Revision of Prior Period Results (Tables)	12 Months Ended
	Dec. 31, 2014
Accounting Changes and Error Corrections [Abstract]
Schedule of Error Corrections and Prior Period Adjustments [Table Text Block]		31-Dec-13
		As Reported		Revisions			As Revised
	Deferred Income Tax Liability	$	35,039	$	1,608		$	36,647
	Retained Earnings		56,657		(1,608	)		55,049
	Total Stockholders’ Equity		100,538		(1,608	)		98,930

Note_1_Description_of_Business2

Note 1 - Description of Business and Summary of Significant Accounting Policies (Details)	12 Months Ended
	Dec. 31, 2014
Note 1 - Description of Business and Summary of Significant Accounting Policies (Details) [Line Items]
Average Days for Collecion of Accounts Receivable	44 days
Building and Building Improvements [Member] | Minimum [Member]
Note 1 - Description of Business and Summary of Significant Accounting Policies (Details) [Line Items]
Property, Plant and Equipment, Useful Life	5 years
Building and Building Improvements [Member] | Maximum [Member]
Note 1 - Description of Business and Summary of Significant Accounting Policies (Details) [Line Items]
Property, Plant and Equipment, Useful Life	39 years 6 months
Transportation Equipment [Member] | Minimum [Member]
Note 1 - Description of Business and Summary of Significant Accounting Policies (Details) [Line Items]
Property, Plant and Equipment, Useful Life	4 years
Transportation Equipment [Member] | Maximum [Member]
Note 1 - Description of Business and Summary of Significant Accounting Policies (Details) [Line Items]
Property, Plant and Equipment, Useful Life	14 years
Other Machinery and Equipment [Member] | Minimum [Member]
Note 1 - Description of Business and Summary of Significant Accounting Policies (Details) [Line Items]
Property, Plant and Equipment, Useful Life	3 years
Other Machinery and Equipment [Member] | Maximum [Member]
Note 1 - Description of Business and Summary of Significant Accounting Policies (Details) [Line Items]
Property, Plant and Equipment, Useful Life	20 years
Earliest Tax Year [Member] | Domestic Tax Authority [Member]
Note 1 - Description of Business and Summary of Significant Accounting Policies (Details) [Line Items]
Open Tax Year	2009
Earliest Tax Year [Member] | State and Local Jurisdiction [Member]
Note 1 - Description of Business and Summary of Significant Accounting Policies (Details) [Line Items]
Open Tax Year	2009
Latest Tax Year [Member] | Domestic Tax Authority [Member]
Note 1 - Description of Business and Summary of Significant Accounting Policies (Details) [Line Items]
Open Tax Year	2014
Latest Tax Year [Member] | State and Local Jurisdiction [Member]
Note 1 - Description of Business and Summary of Significant Accounting Policies (Details) [Line Items]
Open Tax Year	2014

Note_1_Description_of_Business3

Note 1 - Description of Business and Summary of Significant Accounting Policies (Details) - Summary of Accounts Receivable (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
In Thousands, unless otherwise specified
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, gross, current	$77,845	$68,755
Less: Allowance for doubtful accounts	-1,020	-610	-423	-420
Accounts receivable, net	76,825	68,145
Trade Accounts Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, gross, current	72,206	65,292
Other Accounts Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, gross, current	$5,639	$3,463

Note_1_Description_of_Business4

Note 1 - Description of Business and Summary of Significant Accounting Policies (Details) - Allowance for Doubtful Accounts Activities (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Allowance for Doubtful Accounts Activities [Abstract]
Balance at beginning of year	$610	$423	$420
Provision for doubtful accounts	782	187	153
Uncollectible accounts written off, net of recovery	-372		-150
Balance at end of year	$1,020	$610	$423

Note_2_Segment_Reporting_Detai

Note 2 - Segment Reporting (Details) (USD $)

3 Months Ended

12 Months Ended

In Thousands, unless otherwise specified

Dec. 31, 2014

Sep. 30, 2014

Jun. 30, 2014

Mar. 31, 2014

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2013

Mar. 31, 2013

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2012

Note 2 - Segment Reporting (Details) [Line Items]

Number of Reportable Segments

2

Revenues

$150,072

$153,618

$153,298

$145,489

$141,417

$141,822

$139,738

$132,027

$602,477

$555,005

$512,428

Trucking [Member] | Operating Segments [Member] | Foreign Countries [Member]

Note 2 - Segment Reporting (Details) [Line Items]

Revenues

57,300

57,100

45,500

Trucking [Member] | Operating Segments [Member]

Note 2 - Segment Reporting (Details) [Line Items]

Revenues

424,082

[1]

418,601

[1]

381,569

[1]

Trucking [Member]

Note 2 - Segment Reporting (Details) [Line Items]

Revenues

$423,495

$418,115

$381,545

[1]

Includes foreign revenue of $57.3 million, $57.1 million, and $45.5 million for years ended December 31, 2014, 2013 and 2012, respectively.

Note_2_Segment_Reporting_Detai1

Note 2 - Segment Reporting (Details) - Segment Reporting Information, by Segment (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Operating revenue:
Revenue	$150,072	$153,618	$153,298	$145,489	$141,417	$141,822	$139,738	$132,027	$602,477		$555,005		$512,428
Operating income (loss):
Operating income (loss)	8,610	5,419	4,257	-1,043	-4,692	-204	-945	-2,827	17,243		-8,667		-23,272
Depreciation and amortization:
Depreciation and amortization									43,830		44,947		45,058
Operating Segments [Member] | Trucking [Member]
Operating revenue:
Revenue									424,082	[1]	418,601	[1]	381,569	[1]
Operating income (loss):
Operating income (loss)									-3,532		-17,667		-29,843
Depreciation and amortization:
Depreciation and amortization									43,648		44,697		44,558
Operating Segments [Member] | SCS [Member]
Operating revenue:
Revenue									192,924		146,492		156,349
Operating income (loss):
Operating income (loss)									20,775		9,000		6,571
Depreciation and amortization:
Depreciation and amortization									182		250		500
Intersegment Eliminations [Member] | Trucking [Member]
Operating revenue:
Revenue									-587		-486		-24
Intersegment Eliminations [Member] | SCS [Member]
Operating revenue:
Revenue									-13,942		-9,602		-25,466
Trucking [Member]
Operating revenue:
Revenue									423,495		418,115		381,545
SCS [Member]
Operating revenue:
Revenue									$178,982		$136,890		$130,883
[1]	Includes foreign revenue of $57.3 million, $57.1 million, and $45.5 million for years ended December 31, 2014, 2013 and 2012, respectively.

Note_3_Prepaid_and_Other_Curre2

Note 3 - Prepaid and Other Current Assets (Details) - Prepaid Expenses and Other Current Assets (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Note 3 - Prepaid and Other Current Assets (Details) - Prepaid Expenses and Other Current Assets [Line Items]
Prepaid expenses and other current assets	$17,318	$16,064
Prepaid Tires [Member]
Note 3 - Prepaid and Other Current Assets (Details) - Prepaid Expenses and Other Current Assets [Line Items]
Prepaid expenses and other current assets	12,121	10,607
Prepaid Licenses, Permits and Tolls [Member]
Note 3 - Prepaid and Other Current Assets (Details) - Prepaid Expenses and Other Current Assets [Line Items]
Prepaid expenses and other current assets	1,923	1,915
Prepaid Insurance [Member]
Note 3 - Prepaid and Other Current Assets (Details) - Prepaid Expenses and Other Current Assets [Line Items]
Prepaid expenses and other current assets	1,166	1,414
Other Current Assets [Member]
Note 3 - Prepaid and Other Current Assets (Details) - Prepaid Expenses and Other Current Assets [Line Items]
Prepaid expenses and other current assets	$2,108	$2,128

Note_4_Note_Receivable_Details

Note 4 - Note Receivable (Details) (USD $)	1 Months Ended	12 Months Ended
	Nov. 30, 2010	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Receivables [Abstract]
Proceeds from Sale of Real Estate	$200,000
Notes, Loans and Financing Receivable, Gross, Noncurrent	2,100,000
Note Receivable Interest Rate	7.00%
Maturities of Note Receivable	1,900,000
Deferred Gain, Sale Of Property	700,000
Gain (Loss) on Disposition of Property Plant Equipment		7,800	7,300	6,800
Notes, Loans and Financing Receivable, Net, Current		$1,900,000

Note_5_Accrued_Expenses_Detail

Note 5 - Accrued Expenses (Details) - Accrued Expenses (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Accrued Expenses [Abstract]
Salaries, wages and employee benefits	$7,043	$4,747
Federal and state tax accruals	186	2,576
Other	1,023	1,409
Total accrued expenses	$8,252	$8,732

Note_6_Longterm_Debt_Details

Note 6 - Long-term Debt (Details) (USD $)	0 Months Ended	12 Months Ended	1 Months Ended
	Oct. 01, 2014	Dec. 31, 2014	Dec. 31, 2014	Dec. 31, 2013	Aug. 24, 2012
Note 6 - Long-term Debt (Details) [Line Items]
Minimum Excess Availability, Percentage of Maximum Revolver Amount		15.00%	15.00%
Letters of Credit Outstanding, Amount		4,300,000	$4,300,000
Notes Payable		896,000	896,000	1,023,000
Scenario, Forecast [Member] | Revolving Credit Facility [Member] | Maximum [Member]
Note 6 - Long-term Debt (Details) [Line Items]
Line of Credit Facility, Capacity Available for Specific Purpose Other than for Trade Purchases		73,500,000	73,500,000
Revolver [Member] | Letter of Credit [Member]
Note 6 - Long-term Debt (Details) [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		15,000,000	15,000,000
Notes Payable, Other Payables [Member]
Note 6 - Long-term Debt (Details) [Line Items]
Debt Instrument, Face Amount	1,400,000
Debt Instrument, Periodic Payment	100,000
Debt Instrument, Interest Rate, Stated Percentage	2.40%
Notes Payable		900,000	900,000
Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member]
Note 6 - Long-term Debt (Details) [Line Items]
Debt Instrument, Basis Spread on Variable Rate		2.25%
Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member]
Note 6 - Long-term Debt (Details) [Line Items]
Debt Instrument, Basis Spread on Variable Rate		2.75%
Revolving Credit Facility [Member] | Minimum [Member]
Note 6 - Long-term Debt (Details) [Line Items]
Book Value Of Excess Collateral		30,000,000	30,000,000
Revolving Credit Facility [Member]
Note 6 - Long-term Debt (Details) [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity					125,000,000
Line of Credit Facility, Additional Borrowing Capacity		50,000,000	50,000,000
Line of Credit Facility, Minimum Excess Availability		18,800,000	18,800,000
Book Value Of Excess Collateral		31,600,000	31,600,000
Proceeds from Long-term Lines of Credit			0
Debt, Weighted Average Interest Rate		3.10%	3.10%
Line of Credit Facility, Remaining Borrowing Capacity		30,900,000	$30,900,000

Note_6_Longterm_Debt_Details_L

Note 6 - Long-term Debt (Details) - Long-term Debt (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Long-term Debt, Unclassified [Abstract]
Revolving credit agreement	$71,000	$64,000
Other	896	1,023
Total debt	71,896	65,023
Less current maturities	-896	-1,023
Long-term debt, less current maturities	$71,000	$64,000

Note_7_Leases_and_Commitments_1

Note 7 - Leases and Commitments (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Note 7 - Leases and Commitments (Details) [Line Items]
Capital Lease Obligations	$45.30
Capital Lease Obligations, Current	23.1
Capital Leases, Income Statement, Amortization Expense	12.7	12.7	10.7
Operating Leases, Rent Expense	5.3	2.8	3.1
Capital Leases, Future Minimum Payments, Interest Included in Payments	1.5
Percentage of Cancelable Revenue Equipment Orders with Lapses in Notice Period	100.00%
IT Related Hardware [Member] | Capital Lease Obligations [Member]
Note 7 - Leases and Commitments (Details) [Line Items]
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum	3.10%
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Maximum	4.50%
IT Related Hardware [Member]
Note 7 - Leases and Commitments (Details) [Line Items]
Purchase Obligation	0.3
Revenue Equipment [Member]
Note 7 - Leases and Commitments (Details) [Line Items]
Purchase Obligation	$19.60
Capital Lease Obligations [Member] | Minimum [Member]
Note 7 - Leases and Commitments (Details) [Line Items]
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum	1.60%
Capital Lease Obligations [Member] | Maximum [Member]
Note 7 - Leases and Commitments (Details) [Line Items]
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Maximum	3.10%

Note_7_Leases_and_Commitments_2

Note 7 - Leases and Commitments (Details) - Capitalized Leases Included in Property and Equipment (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Capitalized Leases Included in Property and Equipment [Abstract]
Capitalized Costs	$75,188	$84,410
Accumulated Amortization	27,770	20,942
Net Book Value	$47,418	$63,468

Note_7_Leases_and_Commitments_3

Note 7 - Leases and Commitments (Details) - Future Minimum Payments under Capitalized Leases (USD $)	Dec. 31, 2014
Future Minimum Payments under Capitalized Leases [Abstract]
Future minimum payments	$23,926,000
Future minimum payments	17,201,000
Future minimum payments	3,851,000
Future minimum payments	2,067,000
Future minimum payments	0
Future minimum payments	0
Future rentals under operating leases	4,169,000
Future rentals under operating leases	3,681,000
Future rentals under operating leases	3,593,000
Future rentals under operating leases	3,237,000
Future rentals under operating leases	96,000
Future rentals under operating leases	$185,000

Note_8_Federal_and_State_Incom2

Note 8 - Federal and State Income Taxes (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Note 8 - Federal and State Income Taxes (Details) [Line Items]
Deferred Tax Assets, Tax Credit Carryforwards, General Business	$100,000
Deferred Tax Assets, Tax Credit Carryforwards, Alternative Minimum Tax	1,400,000
Deferred State and Local Income Tax Expense (Benefit)	-125,000	-681,000	-1,646,000
Deferred State and Local IncomeTax Expense Benefit, Adjustment	-1,400,000
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability	1,200,000
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	35.00%	34.00%	34.00%
Domestic Tax Authority [Member]
Note 8 - Federal and State Income Taxes (Details) [Line Items]
Operating Loss Carryforwards	$8,500,000

Note_8_Federal_and_State_Incom3

Note 8 - Federal and State Income Taxes (Details) - Significant Components Deferred Tax Assets and Liabilities (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Current deferred tax assets:
Accrued expenses not deductible until paid	$7,805	$7,648
Net operating loss carry forwards	3,318
Federal credits	1,556
Equity incentive plan	184	282
Revenue recognition	332	330
Allowance for doubtful accounts	391	234
Other	822	452
Total current deferred tax assets	14,408	8,946
Current deferred tax liabilities:
Prepaid expenses deductible when paid	-6,701	-6,159
Net current deferred tax assets (liabilities)	7,707	2,787
Noncurrent deferred tax assets:
Capital leases	70
Non-compete agreement		18
Net operating loss carry forwards		4,444
Total noncurrent deferred tax assets	70	4,462
Noncurrent deferred tax liabilities:
Tax over book depreciation	-46,758	-41,041
Capitalized leases		-71
Other		3
Total noncurrent deferred tax liabilities	-46,758	-41,109
Net noncurrent deferred tax liabilities	($46,688)	($36,647)

Note_8_Federal_and_State_Incom4

Note 8 - Federal and State Income Taxes (Details) - Significant Components of Provision (Benefits) for Income Taxes (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Current:
Federal									($129)	$786
State									201
Total current									72	786
Deferred:
Federal									5,246	-4,093	-7,943
State									-125	-681	-1,646
Total deferred									5,121	-4,774	-9,589
Total income tax expense (benefit)	$3,326	$1,817	$644	($594)	($2,446)	$42	($448)	($1,136)	$5,193	($3,988)	($9,589)

Note_8_Federal_and_State_Incom5

Note 8 - Federal and State Income Taxes (Details) - Effective Income Tax Rate Reconciliation (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Effective Income Tax Rate Reconciliation [Abstract]
Income tax expense (benefit) at statutory federal rate									$3,929	($4,453)	($9,268)
Federal income tax effects of:
State income tax (benefit) expense									-27	231	558
Per diem and other nondeductible meals and entertainment									872	875	748
Other									343	40	19
Federal income tax expense (benefit)									5,117	-3,307	-7,943
State income tax expense (benefit)									76	-681	-1,646
Total income tax expense (benefit)	$3,326	$1,817	$644	($594)	($2,446)	$42	($448)	($1,136)	$5,193	($3,988)	($9,589)
Effective tax rate									46.30%	30.40%	35.20%

Note_9_Equity_Compensation_and2

Note 9 - Equity Compensation and Employee Benefit Plans (Details) (USD $)	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013	Dec. 31, 2012
Note 9 - Equity Compensation and Employee Benefit Plans (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share)	$0		$1.75	$2.43
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in Dollars per share)		[1]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options (in Dollars)	$12,500
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent	50.00%
Common Stock [Member]
Note 9 - Equity Compensation and Employee Benefit Plans (Details) [Line Items]
Share Price (in Dollars per share)	$28.40
Employee Stock Option [Member] | Minimum [Member]
Note 9 - Equity Compensation and Employee Benefit Plans (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 years
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period	3 years
Employee Stock Option [Member] | Maximum [Member]
Note 9 - Equity Compensation and Employee Benefit Plans (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	4 years
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period	10 years
Employee Stock Option [Member]
Note 9 - Equity Compensation and Employee Benefit Plans (Details) [Line Items]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition	2 years 219 days
Restricted Stock [Member]
Note 9 - Equity Compensation and Employee Benefit Plans (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	4 years
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition	2 years 109 days
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options (in Dollars)	$425,000
Minimum [Member]
Note 9 - Equity Compensation and Employee Benefit Plans (Details) [Line Items]
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in Dollars per share)	$2.88
Maximum [Member]
Note 9 - Equity Compensation and Employee Benefit Plans (Details) [Line Items]
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in Dollars per share)	$18.58
Incentive Plan [Member]
Note 9 - Equity Compensation and Employee Benefit Plans (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in Shares)	500,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in Shares)	480,354
[1]	The weighted-average grant date fair value of options granted during 2014, 2013 and 2012 was zero, $1.75 and $2.43, respectively.

Note_9_Equity_Compensation_and3

Note 9 - Equity Compensation and Employee Benefit Plans (Details) - Recoginzed Compensation Expense (Omnibus 2014 Incentive Plan [Member], USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Compensation expense	$366	$216	$131
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Compensation expense	31	54	67
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Compensation expense	$335	$162	$64

Note_9_Equity_Compensation_and4

Note 9 - Equity Compensation and Employee Benefit Plans (Details) - Assumptions Used to Value Stock Options Granted	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Note 9 - Equity Compensation and Employee Benefit Plans (Details) - Assumptions Used to Value Stock Options Granted [Line Items]
Dividend yield	0.00%	0.00%
Expected volatility	35.60%
Risk-free interest rate	1.20%
Expected life (in years)	6 years 3 months
Minimum [Member]
Note 9 - Equity Compensation and Employee Benefit Plans (Details) - Assumptions Used to Value Stock Options Granted [Line Items]
Expected volatility		29.80%
Risk-free interest rate		0.50%
Expected life (in years)		3 years 9 months
Maximum [Member]
Note 9 - Equity Compensation and Employee Benefit Plans (Details) - Assumptions Used to Value Stock Options Granted [Line Items]
Expected volatility		64.00%
Risk-free interest rate		0.70%
Expected life (in years)		4 years 3 months

Note_9_Equity_Compensation_and5

Note 9 - Equity Compensation and Employee Benefit Plans (Details) - Option Activity (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014
Option Activity [Abstract]
Options outstanding - beginning of year	109,871
Options outstanding - beginning of year	$9,490
Outstanding at December 31, 2014 (3)	64,636	[1]
Outstanding at December 31, 2014 (3)	$6,600	[1]
Outstanding at December 31, 2014 (3)	6 years 3 days	[1]
Outstanding at December 31, 2014 (3)	$1,332	[1],[2]
Exercisable at December 31, 2014	28,671
Exercisable at December 31, 2014	$8,590
Exercisable at December 31, 2014	3 years 354 days
Exercisable at December 31, 2014	534	[2]
Granted (2)		[3]
Granted (2)		[3]
Exercised	-28,884
Exercised	$12,410
Exercised	$131	[2]
Cancelled/forfeited	-16,137
Cancelled/forfeited	$15,820
Expired	-214
Expired	$11,730
[1]	The exercise prices of outstanding options granted range from $2.88 to $18.58 as of December 31, 2014.
[2]	The intrinsic value of a stock option is the amount by which the market value of the underlying stock exceeds the exercise price of the option. The per share market value of the Company's common stock, as determined by the closing price on December 31, 2014, was $28.40.
[3]	The weighted-average grant date fair value of options granted during 2014, 2013 and 2012 was zero, $1.75 and $2.43, respectively.

Note_9_Equity_Compensation_and6

Note 9 - Equity Compensation and Employee Benefit Plans (Details) - Restricted Stock Awards (Restricted Stock [Member], USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014
Restricted Stock [Member]
Note 9 - Equity Compensation and Employee Benefit Plans (Details) - Restricted Stock Awards [Line Items]
Nonvested shares – December 31, 2013	199,619
Nonvested shares – December 31, 2013	$7.20
Granted	20,851
Granted	$16.60
Forfeited	-35,140
Forfeited	$10.74
Vested	-60,486
Vested	$5.68
Nonvested shares – December 31, 2014	124,844
Nonvested shares – December 31, 2014	$8.51

Note_9_Equity_Compensation_and7

Note 9 - Equity Compensation and Employee Benefit Plans (Details) - Fair Value of Stock Options and Restricted Stock Vested (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Fair Value of Stock Options and Restricted Stock Vested [Abstract]
Stock options	$49	$60	$177
Restricted stock	$931	$144	$57

Note_10_Earnings_Loss_Per_Shar2

Note 10 - Earnings (Loss) Per Share (Details) - Computation of Basic and Diluted Loss Earnings Per Share (USD $)	3 Months Ended								12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Numerator:
Net income (loss) (in Dollars)	$4,183	$2,717	$722	($1,589)	($4,636)	($602)	($1,398)	($2,474)	$6,033	($9,110)	($17,671)
Denominator:
Denominator for basic earnings (loss) per share – weighted-average shares	10,374	10,357	10,346	10,339	10,323	10,322	10,293	10,305	10,356	10,323	10,310
Effect of dilutive securities:
Employee stock options and restricted stock									129	0
Denominator for diluted earnings (loss) per share – adjusted weighted-average shares and assumed conversions	10,492	10,476	10,478	10,339	10,323	10,322	10,293	10,305	10,485	10,323	10,310
Basic earnings (loss) per share (in Dollars per share)	$0.40	$0.26	$0.07	($0.15)	($0.45)	($0.06)	($0.14)	($0.24)	$0.58	($0.88)	($1.71)
Diluted earnings (loss) per share (in Dollars per share)	$0.40	$0.26	$0.07	($0.15)	($0.45)	($0.06)	($0.14)	($0.24)	$0.58	($0.88)	($1.71)
Weighted-average anti-dilutive employee stock options and restricted stock									3	103	200

Note_13_Quarterly_Results_of_O2

Note 13 - Quarterly Results of Operations (Unaudited) (Details) - Quarterly Financial Information (USD $)	3 Months Ended								12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Quarterly Financial Information [Abstract]
Operating revenue	$150,072	$153,618	$153,298	$145,489	$141,417	$141,822	$139,738	$132,027	$602,477	$555,005	$512,428
Operating expenses	141,462	148,199	149,041	146,532	146,109	142,026	140,683	134,854
Operating income (loss)	8,610	5,419	4,257	-1,043	-4,692	-204	-945	-2,827	17,243	-8,667	-23,272
Other, net	1,101	885	2,891	1,140	2,390	356	901	783
Income (loss) before income taxes	7,509	4,534	1,366	-2,183	-7,082	-560	-1,846	-3,610	11,226	-13,098	-27,260
Income tax expense (benefit)	3,326	1,817	644	-594	-2,446	42	-448	-1,136	5,193	-3,988	-9,589
Net income (loss)	$4,183	$2,717	$722	($1,589)	($4,636)	($602)	($1,398)	($2,474)	$6,033	($9,110)	($17,671)
Average shares outstanding (basic) (in Shares)	10,374	10,357	10,346	10,339	10,323	10,322	10,293	10,305	10,356	10,323	10,310
Basic earnings (loss) per share (in Dollars per share)	$0.40	$0.26	$0.07	($0.15)	($0.45)	($0.06)	($0.14)	($0.24)	$0.58	($0.88)	($1.71)
Average shares outstanding (diluted) (in Shares)	10,492	10,476	10,478	10,339	10,323	10,322	10,293	10,305	10,485	10,323	10,310
Diluted earnings (loss) per share (in Dollars per share)	$0.40	$0.26	$0.07	($0.15)	($0.45)	($0.06)	($0.14)	($0.24)	$0.58	($0.88)	($1.71)

Note_14_Revision_of_Prior_Peri2

Note 14 - Revision of Prior Period Results (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Note 14 - Revision of Prior Period Results (Details) [Line Items]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	35.00%	34.00%	34.00%
Income Tax Net Operating Loss Carry Forwards [Member]
Note 14 - Revision of Prior Period Results (Details) [Line Items]
Impact of Restatement on Opening Retained Earnings, Net of Tax		1.6	1.6	$1.60	$1.60	$1.60

Note_14_Revision_of_Prior_Peri3

Note 14 - Revision of Prior Period Results (Details) - Effects of Revisions in Financial Statements (USD $)	Dec. 31, 2014	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013
In Thousands, unless otherwise specified
Retained Earnings	$61,082
Total Stockholders’ Equity	105,348	109,430	126,972
Deferred Tax Adjustment, Prior Period [Member] | Scenario, Previously Reported [Member]
Deferred Income Tax Liability				35,039
Retained Earnings				56,657
Total Stockholders’ Equity				100,538
Deferred Tax Adjustment, Prior Period [Member] | Restatement Adjustment [Member]
Deferred Income Tax Liability				1,608
Retained Earnings				-1,608
Total Stockholders’ Equity				-1,608
Deferred Tax Adjustment, Prior Period [Member]
Deferred Income Tax Liability				36,647
Retained Earnings				55,049
Total Stockholders’ Equity				98,930
Scenario, Previously Reported [Member]
Total Stockholders’ Equity				$100,538

Note_15_Subsequent_Events_Deta

Note 15 - Subsequent Events (Details) (USD $)	0 Months Ended	3 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Feb. 28, 2015	Mar. 31, 2015	Dec. 31, 2014	Aug. 24, 2012
Note 15 - Subsequent Events (Details) [Line Items]
Minimum Excess Availability, Percentage of Maximum Revolver Amount			15.00%
Subsequent Event [Member] | Through May 31, 2016 [Member] | Revolving Credit Facility [Member] | Base Rate [Member] | Minimum [Member]
Note 15 - Subsequent Events (Details) [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.25%
Subsequent Event [Member] | Through May 31, 2016 [Member] | Revolving Credit Facility [Member] | Base Rate [Member] | Maximum [Member]
Note 15 - Subsequent Events (Details) [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.00%
Subsequent Event [Member] | Through May 31, 2016 [Member] | Revolving Credit Facility [Member] | Base Rate [Member]
Note 15 - Subsequent Events (Details) [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.50%
Subsequent Event [Member] | Through May 31, 2016 [Member] | Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member]
Note 15 - Subsequent Events (Details) [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.50%
Subsequent Event [Member] | After May 31, 2016 [Member] | Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member]
Note 15 - Subsequent Events (Details) [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.25%
Subsequent Event [Member] | After May 31, 2016 [Member] | Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member]
Note 15 - Subsequent Events (Details) [Line Items]
Debt Instrument, Basis Spread on Variable Rate	2.00%
Subsequent Event [Member] | Eligible Investment Grade Accounts Receivable [Member] | Revolving Credit Facility [Member] | Minimum [Member]
Note 15 - Subsequent Events (Details) [Line Items]
Borrowing Based Treshhold, Percentage	85.00%
Subsequent Event [Member] | Eligible Investment Grade Accounts Receivable [Member] | Revolving Credit Facility [Member] | Maximum [Member]
Note 15 - Subsequent Events (Details) [Line Items]
Borrowing Based Treshhold, Percentage	90.00%
Subsequent Event [Member] | Eligible Non-investment Grade Accounts Receivable [Member] | Revolving Credit Facility [Member]
Note 15 - Subsequent Events (Details) [Line Items]
Borrowing Based Treshhold, Percentage	85.00%
Subsequent Event [Member] | Eligible Unbilled Accounts Receivable [Member] | Revolving Credit Facility [Member]
Note 15 - Subsequent Events (Details) [Line Items]
Borrowing Based Treshhold, Percentage	85.00%
Subsequent Event [Member] | Eligible Revenue Equipment [Member] | Revolving Credit Facility [Member]
Note 15 - Subsequent Events (Details) [Line Items]
Borrowing Based Treshhold, Percentage	85.00%
Borrowing Base before Additions (in Dollars)	10
Subsequent Event [Member] | Newly Acquired Revenue Equipment[Member] | Revolving Credit Facility [Member]
Note 15 - Subsequent Events (Details) [Line Items]
Borrowing Based Treshhold, Percentage	85.00%
Subsequent Event [Member] | Revolving Credit Facility [Member]
Note 15 - Subsequent Events (Details) [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity (in Dollars)	170
Line of Credit Facility, Additional Borrowing Capacity (in Dollars)	80
Line of Credit Facility Additional Borrowing Capacity, Incremental Amount (in Dollars)	20
Debt Instrument, Term	5 years
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	0.25%
Write off of Deferred Debt Issuance Cost (in Dollars)		0.8
Debt Instrument, Covenant, Fixed Charge Coverage Ratio	1
Minimum Excess Availability, Percentage of Maximum Revolver Amount	10.00%
Subsequent Event [Member] | Letter of Credit Sub Facility [Member]
Note 15 - Subsequent Events (Details) [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity (in Dollars)	15
Subsequent Event [Member] | Swing Line Sub Facility [Member]
Note 15 - Subsequent Events (Details) [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity (in Dollars)	20
Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member]
Note 15 - Subsequent Events (Details) [Line Items]
Debt Instrument, Basis Spread on Variable Rate			2.25%
Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member]
Note 15 - Subsequent Events (Details) [Line Items]
Debt Instrument, Basis Spread on Variable Rate			2.75%
Revolving Credit Facility [Member]
Note 15 - Subsequent Events (Details) [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity (in Dollars)				125
Line of Credit Facility, Additional Borrowing Capacity (in Dollars)			50