Pamt (PAMT) 10-K 9 Mar 18 2017 FY Annual report Financial data

Document And Entity Information

Document And Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2017	Feb. 23, 2018	Jun. 30, 2017
Document Information [Line Items]
Entity Registrant Name	PAM TRANSPORTATION SERVICES INC
Entity Central Index Key	798,287
Trading Symbol	ptsi
Current Fiscal Year End Date	--12-31
Entity Filer Category	Smaller Reporting Company
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	No
Entity Common Stock, Shares Outstanding (in shares)		6,175,889
Entity Public Float			$ 44,740,455
Document Type	10-K
Document Period End Date	Dec. 31, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	FY
Amendment Flag	false

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($)	Dec. 31, 2017	Dec. 31, 2016
CURRENT ASSETS:
Cash and cash equivalents	$ 224,000	$ 137,000
Trade, less allowance of $1,335 and $994, respectively	59,055,000	56,143,000
Other	3,028,000	4,982,000
Inventories	1,660,000	1,900,000
Prepaid expenses and deposits	10,112,000	8,777,000
Marketable equity securities	26,664,000	27,621,000
Income taxes refundable	1,499,000	738,000
Total current assets	102,242,000	100,298,000
PROPERTY AND EQUIPMENT:
Land	5,374,000	5,374,000
Structures and improvements	18,927,000	18,861,000
Revenue equipment	375,817,000	355,339,000
Office furniture and equipment	9,761,000	10,402,000
Total property and equipment	409,879,000	389,976,000
Accumulated depreciation	(122,935,000)	(112,600,000)
Net property and equipment	286,944,000	277,376,000
OTHER ASSETS	2,999,000	2,392,000
TOTAL ASSETS	392,185,000	380,066,000
CURRENT LIABILITIES:
Accounts payable	19,645,000	16,088,000
Accrued expenses and other liabilities	17,609,000	22,330,000
Current maturities of long-term debt	73,641,000	42,806,000
Total current liabilities	110,895,000	81,224,000
Long-term debt—less current portion	98,995,000	124,391,000
Deferred income taxes	54,691,000	80,293,000
Total liabilities	264,581,000	285,908,000
COMMITMENTS AND CONTINGENCIES (Note 15)
STOCKHOLDERS’ EQUITY
Preferred stock, $.01 par value, 10,000,000 shares authorized; none issued
Common stock, $.01 par value, 40,000,000 shares authorized; 11,529,124 and 11,510,863 shares issued; 6,160,889 and 6,396,803 shares outstanding at December 31, 2017 and December 31, 2016, respectively	115,000	115,000
Additional paid-in capital	81,559,000	80,822,000
Accumulated other comprehensive income	7,444,000	7,476,000
Treasury stock, at cost; 5,368,235 and 5,114,060 shares at December 31, 2017 and December 31, 2016, respectively	(129,183,000)	(122,835,000)
Retained earnings	167,669,000	128,580,000
Total stockholders’ equity	127,604,000	94,158,000
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 392,185,000	$ 380,066,000

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Trade, allowance	$ 1,335	$ 994	$ 549	$ 1,611
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, authorized (in shares)	10,000,000	10,000,000
Preferred stock, issued (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, authorized (in shares)	40,000,000	40,000,000
Common stock, issued (in shares)	11,529,124	11,510,863
Common stock, outstanding (in shares)	6,160,889	6,396,803
Treasury stock (in shares)	5,368,235	5,114,060

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
OPERATING REVENUES:
Revenue, before fuel surcharge	$ 373,523	$ 382,737	$ 355,403
Fuel surcharge	64,315	50,115	61,647
Total operating revenues	437,838	432,852	417,050
OPERATING EXPENSES AND COSTS:
Salaries, wages and benefits	102,227	112,235	105,943
Operating supplies and expenses	79,505	82,993	89,878
Rents and purchased transportation	174,477	158,298	134,188
Depreciation	42,274	39,114	32,346
Insurance and claims	17,484	16,632	15,315
Other	9,249	8,352	8,904
Gain on disposition of equipment	(58)	(4,700)	(5,754)
Total operating expenses and costs	425,158	412,924	380,820
OPERATING INCOME	12,680	19,928	36,230
NON-OPERATING INCOME	5,853	1,485	1,516
INTEREST EXPENSE	(3,902)	(3,641)	(2,818)
INCOME BEFORE INCOME TAXES	14,631	17,772	34,928
FEDERAL & STATE INCOME TAX EXPENSE (BENEFIT):
Current	362	13	591
Deferred	(24,630)	6,658	12,901
Total federal & state income tax (benefit) expense	(24,268)	6,671	13,492
NET INCOME	$ 38,899	$ 11,101	$ 21,436
EARNINGS PER COMMON SHARE:
Basic (in dollars per share)	$ 6.14	$ 1.68	$ 2.94
Diluted (in dollars per share)	$ 6.08	$ 1.67	$ 2.93
AVERAGE COMMON SHARES OUTSTANDING:
Basic (in shares)	6,331	6,627	7,288
Diluted (in shares)	6,398	6,649	7,325

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
NET INCOME		$ 38,899	$ 11,101	$ 21,436
Other comprehensive income (loss), net of tax:
Reclassification adjustment for realized gains on marketable securities included in net income (1)	[1]	(2,059)	(543)	(646)
Reclassification adjustment for unrealized losses on marketable securities included in net income (2)	[2]	26	440	516
Changes in fair value of marketable securities (3)	[3]	2,001	2,269	(962)
COMPREHENSIVE INCOME		$ 38,867	$ 13,267	$ 20,344
[1]	Net of deferred income taxes of $(1,326), $(333), and $(396), respectively.
[2]	Net of deferred income taxes of $16, $269, and $316, respectively.
[3]	Net of deferred income taxes of $(687), $1,390, and $(588), respectively.

Consolidated Statements of Com6

Consolidated Statements of Comprehensive Income (Parentheticals) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Reclassification adjustment for realized gains on marketable securities included in net income, tax	$ (1,326)	$ (333)	$ (396)
Reclassification adjustment for unrealized losses on marketable securities included in net income, tax	16	269	316
Changes in fair value of marketable securities, tax	$ (687)	$ 1,390	$ (588)

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	AOCI Attributable to Parent [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Dec. 31, 2014	7,423,000
Balance at Dec. 31, 2014	$ 115	$ 79,926	$ 6,402	$ (82,501)	$ 96,043	$ 99,985
Net income					21,436	21,436
Other comprehensive (loss), net of tax			(1,092)			$ (1,092)
Exercise of stock options-shares issued including tax benefits (in shares)	21,000					20,250
Exercise of stock options-shares issued including tax benefits		236				$ 236
Restricted stock issued (in shares)	3,000
Restricted stock issued
Treasury stock repurchases (in shares)	(330,000)
Treasury stock repurchases				(19,278)		(19,278)
Share-based compensation		267				267
Balance (in shares) at Dec. 31, 2015	7,117,000
Balance at Dec. 31, 2015	$ 115	80,429	5,310	(101,779)	117,479	101,554
Net income					11,101	11,101
Other comprehensive (loss), net of tax			2,166			$ 2,166
Exercise of stock options-shares issued including tax benefits (in shares)	8,000					7,917
Exercise of stock options-shares issued including tax benefits		91				$ 91
Restricted stock issued (in shares)	5,000
Restricted stock issued
Treasury stock repurchases (in shares)	(733,000)
Treasury stock repurchases				(21,056)		(21,056)
Share-based compensation		302				302
Balance (in shares) at Dec. 31, 2016	6,397,000
Balance at Dec. 31, 2016	$ 115	80,822	7,476	(122,835)	128,580	94,158
Net income					38,899	38,899
Other comprehensive (loss), net of tax			(32)			$ (32)
Exercise of stock options-shares issued including tax benefits (in shares)	11,000					11,063
Exercise of stock options-shares issued including tax benefits		123				$ 123
Restricted stock issued (in shares)	7,000
Restricted stock issued
Treasury stock repurchases (in shares)	(254,000)
Treasury stock repurchases				(6,348)		(6,348)
Share-based compensation		614				614
Balance (in shares) at Dec. 31, 2017	6,161,000
Balance at Dec. 31, 2017	$ 115	81,559	7,444	(129,183)	167,669	127,604
Cumulative effect adjustment – ASU 2016-09					$ 190	$ 190

Consolidated Statements of Sto8

Consolidated Statements of Stockholders' Equity (Parentheticals) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
AOCI Attributable to Parent [Member]
Other comprehensive (loss), tax			$ (668)
Other comprehensive (loss), tax	$ 1,995	$ 1,326
Other comprehensive (loss), tax	$ (687)	$ 1,390	$ (588)

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
OPERATING ACTIVITIES:
Net income	$ 38,899,000	$ 11,101,000	$ 21,436,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	42,274,000	39,114,000	32,346,000
Bad debt expense	341,000	445,000	151,000
Stock compensation—net of excess tax benefits	614,000	302,000	267,000
Sale leaseback deferred gain amortization	0	(131,000)	(224,000)
(Benefit) provision for deferred income taxes	(24,630,000)	6,658,000	12,901,000
Reclassification of other than temporary impairment in marketable equity securities	42,000	709,000	833,000
Recognized gain on marketable equity securities	(4,735,000)	(1,003,000)	(1,001,000)
Gain on sale or disposal of equipment	(58,000)	(4,700,000)	(5,754,000)
Changes in operating assets and liabilities:
Accounts receivable	(1,436,000)	(6,725,000)	1,128,000
Prepaid expenses, deposits, inventories, and other assets	(1,095,000)	(685,000)	1,470,000
Income taxes refundable	(155,000)	2,127,000	(2,358,000)
Trade accounts payable	682,000	3,231,000	886,000
Accrued expenses and other liabilities	(266,000)	(3,041,000)	(556,000)
Net cash provided by operating activities	50,476,000	47,402,000	61,525,000
INVESTING ACTIVITIES:
Purchases of property and equipment	(67,674,000)	(86,128,000)	(125,720,000)
Proceeds from disposition of equipment	18,766,000	32,256,000	33,472,000
Changes in restricted cash	138,000	317,000	8,012,000
Sales of marketable equity securities	6,833,000	1,550,000	1,500,000
Purchases of marketable equity securities, net of return of capital	(3,211,000)	(810,000)	(2,769,000)
Net cash used in investing activities	(45,148,000)	(52,815,000)	(85,505,000)
FINANCING ACTIVITIES:
Borrowings under line of credit	483,297,000	520,089,000	549,955,000
Repayments under line of credit	(485,163,000)	(528,200,000)	(539,979,000)
Borrowings of long-term debt	55,415,000	83,517,000	88,018,000
Repayments of long-term debt	(48,110,000)	(47,457,000)	(53,947,000)
Borrowings under margin account	3,412,000	1,078,000	3,005,000
Repayments under margin account	(7,867,000)	(2,669,000)	(2,779,000)
Repurchases of common stock	(6,348,000)	(21,056,000)	(48,021,000)
Exercise of stock options	123,000	91,000	236,000
Net cash (used in) provided by financing activities	(5,241,000)	5,393,000	(3,512,000)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	87,000	(20,000)	(27,492,000)
CASH, CASH EQUIVALENTS—Beginning of year	137,000	157,000	27,649,000
CASH, CASH EQUIVALENTS—End of year	224,000	137,000	157,000
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION—
Interest	3,905,000	3,597,000	2,821,000
Income taxes	518,000	286,000	2,950,000
NONCASH INVESTING AND FINANCING ACTIVITIES—
Purchases of revenue equipment included in accounts payable	$ 2,973,000	$ 97,000	$ 5,031,000

Note 1 - Accounting Policies

Note 1 - Accounting Policies	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Significant Accounting Policies [Text Block]	1. ACCOUNTING POLICIES Description of Business and Principles of Consolidation –P.A.M. Transportation Services, Inc. (the “Company”), through its subsidiaries, operates as a truckload transportation and logistics company. The consolidated financial statements include the accounts of the Company and its wholly owned operating subsidiaries: P.A.M. Transport, Inc., P.A.M. Cartage Carriers, LLC, Overdrive Leasing, LLC, Choctaw Express, LLC, Decker Transport Co., LLC, T.T.X., LLC, Transcend Logistics, Inc., and East Coast Transport and Logistics, LLC. The following subsidiaries were inactive during all periods presented: P.A.M. International, Inc., P.A.M. Logistics Services, Inc., Choctaw Brokerage, Inc., and S & L Logistics, Inc. Use of Estimates –The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of any contingent assets and liabilities at the financial statement date and reported amounts of revenue and expenses during the reporting period. The Company periodically reviews these estimates and assumptions. The Company's estimates were based on its historical experience and various other assumptions that management believes to be reasonable under the circumstances. Actual results could differ from those estimates. Cash and Cash Equivalents –The Company considers all highly liquid investments with a maturity of three may Accounts Receivable and Allowance for Doubtful Accounts –Accounts receivable are presented in the Company’s consolidated financial statements net of an allowance for estimated uncollectible amounts. Management estimates this allowance based upon an evaluation of the aging of our customer receivables and historical write-offs, as well as other trends and factors surrounding the credit risk of specific customers. The Company continually updates the history it uses to make these estimates so as to reflect the most recent trends, factors and other information available. In order to gather information regarding these trends and factors, the Company also performs ongoing credit evaluations of its customers. Customer receivables are considered to be past due when payment has not may in future periods. Bank Overdrafts –The Company classifies bank overdrafts in current liabilities as accounts payable and does not not zero not December 31, 2017 2016 $4,377,000 $3,509,000, Accounts Receivable Other –The components of accounts receivable other consist primarily of amounts representing company driver advances, independent contractor advances, equipment manufacturer warranties, and restricted cash. Advances receivable from company drivers as of December 31, 2017 2016, $448,000 $628,000, 11, 180 Marketable Equity Securities – Marketable equity securities are classified by the Company as either available for sale or trading. Securities classified as available for sale are carried at market value with unrealized gains and losses recognized in accumulated other comprehensive income in the statements of stockholders’ equity. Securities classified as trading are carried at market value with unrealized gains and losses recognized in the statements of operations. Realized gains and losses are computed utilizing the specific identification method. Impairment of Long-Lived Assets –The Company reviews its long-lived assets for impairment whenever events or changes in circumstances indicate that the carrying amount of a long-lived asset may not not not Property and Equipment –Property and equipment is recorded at historical cost, less accumulated depreciation. For financial reporting purposes, the cost of such property is depreciated principally by the straight-line method. For tax reporting purposes, accelerated depreciation or applicable cost recovery methods are used. Depreciation is recognized over the estimated asset life, considering the estimated salvage value of the asset. Such salvage values are based on estimates using expected market values for used equipment and the estimated time of disposal which, in many cases include guaranteed residual values by the manufacturers. Gains and losses are reflected in the year of disposal. The following is a table reflecting estimated ranges of asset useful lives by major class of depreciable assets: Asset Class Estimated Asset Life (in years) Service vehicles 3 - 5 Office furniture and equipment 3 - 7 Revenue equipment 3 - 12 Structure s and improvements 5 - 40 The Company ’s management periodically evaluates whether changes to estimated useful lives and/or salvage values are necessary to ensure its estimates accurately reflect the economic use of the assets. During 2016, $2.7 $1.3 2017 2016, 2017, not Inventory –Inventories consist primarily of revenue equipment parts, tires, supplies, and fuel. Inventories are carried at the lower of cost or market with cost determined using the first first Prepaid Tires –Tires purchased with revenue equipment are capitalized as a cost of the related equipment. Replacement tires are included in prepaid expenses and deposits and are amortized over a 24 Advertising Expense –Advertising costs are expensed as incurred and totaled approximately $1,087,000, $1,019,000 $988,000 December 31, 2017, 2016 2015, Repairs and Maintenance –Repairs and maintenance costs are expensed as incurred. Self - Insurance Liability not Income Taxes –The Company applies the asset and liability method of accounting for income taxes, under which deferred taxes are determined based on the temporary differences between the financial statement and tax basis of assets and liabilities using tax rates expected to be in effect during the years in which the basis differences reverse. A valuation allowance is recorded when it is more likely than not not The application of income tax law to multi-jurisdictional operations such as those performed by the Company, are inherently complex. Laws and regulations in this area are voluminous and often ambiguous. As such, we may may We recognize the impact of tax positions in our financial statements. These tax positions must meet a more-likely-than- not not first no not first no In determining whether a tax asset valuation allowance is necessary, management, in accordance with the provisions of ASC 740 10 30, December 31, 201 7, not Revenue Recognition –Revenue is recognized in full upon completion of delivery 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. S hare- Based Compensation 12 Earnings Per Share –The Company computes basic earnings per share (“EPS”) by dividing net income (loss) available to common stockholders by the weighted average number of common shares outstanding during the period. Diluted EPS includes the potential dilution that could occur from stock-based awards and other stock-based commitments using the treasury stock or the as if converted methods, as applicable. The difference between the Company's weighted-average shares outstanding and diluted shares outstanding is due to the dilutive effect of stock options for all periods presented. See Note 13 Fair Value Measurements –Certain financial assets and liabilities are measured at fair value within the financial statements on a recurring basis. Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. The fair value hierarchy requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. For additional information with respect to fair value measurements, see Note 17 Reporting Segment s 86.3%, 88.4% 87.6% twelve December 31, 2017, 2016 2015, Concentrations of Credit Risk –The Company performs ongoing credit evaluations and generally does not Subsequent Events – We have evaluated subsequent events for recognition and disclosure through the date these financial statements were filed with the United States Securities and Exchange Commission and concluded that no Foreign Currency Transactions –The functional currency of the Company’s foreign branch office in Mexico is the U.S. dollar. The Company remeasures the monetary assets and liabilities of this branch office, which are maintained in the local currency ledgers, at the rates of exchange in effect at the end of the reporting period. Revenues and expenses recorded in the local currency during the period are remeasured using average exchange rates for each period. Non-monetary assets and liabilities are remeasured using historical rates. Any resulting exchange gain or loss from the remeasurement process are included in non-operating income (loss) in the Company’s consolidated statements of operations. Recent Accounting Pronouncements – In May 2017, No. 2017 09, 2017 09" Compensation – Stock Compensation (Topic 718 718. 2017 09 December 15, 2017 2017 09 2017 09 not In November 2016, No. 2016 18, 2016 18” Statement of Cash Flows (Topic 230 2016 18 No. 2016 18 December 15, 2017, No. 2016 18 not In August 2016, No. 2016 15, 2016 15” Statement of Cash Flows (Topic 230 2016 15 230, eight December 15, 2017, 2016 15 not In June 2016, No. 2016 13, 2016 13” Accounting for Credit Losses (Topic 326 2016 13 2016 13 December 15, 2019, not In March 2016, No. 2016 09, 2016 09” Compensation – Stock Compensation (Topic 718 2016 09 2016 09 December 15, 2017, January 1, 2017, not In February 2016, 2016 02, 2016 02” Leases (Topic 842 twelve not In transition, lessees and lessors will be required to recognize and measure leases at the beginning of the earliest period presented using a modified retrospective approach. The modified retrospective approach includes a number of optional practical expedients that companies may December 15, 2018, not In January 2016, 2016 01, 2016 01” Financial Instruments - Overall (Subtopic 825 10 2016 01 December 15, 2017. not The Company has performed a preliminary analysis of the effects of adopting this guidance. This analysis consisted of the following items: ● categorize securities as either equity securities or debt securities, ● determine which securities held by the Company have readily determinable fair values, ● determine that the exit price notion will be used when measuring the fair value of financial instruments for disclosure purposes, ● consider the need for a valuation allowance related to a deferred tax asset on available-for-sale securities in combination with the Company ’s other deferred tax assets. Based upon this evaluation, the effects of adopting this guidance is not ’s financial condition or cash flows, but it is expected to have a significant impact on the Company’s results of operations through the recognition of increases or decreases in market value each reporting period rather than recognizing them through comprehensive income. In May 2014, No. 2014 09, 2014 09” Revenue from Contracts with Customers 2014 09 2014 09 1 2 3 4 5 2014 09 December 15, 2017 not December 31, 2016. 2014 09. The Company has performed an analysis of the effects of adopting this guidance. The analysis included the following items: ● identifying what constitutes a contract within the Company ’s business practices, ● identifying performance obligations within our contracts, ● determining transaction prices, ● allocating the transa ction price to performance obligations, ● determination of when performance obligations are satisfied and revenue is earned, ● disaggregation of revenue by source within segments, and ● principal vers us agent considerations. Based upon our evaluation, the adoption of ASU No. 2014 09 not

Note 2 - Trade Accounts Receiva

Note 2 - Trade Accounts Receivable	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Financing Receivables [Text Block]	2. TRADE ACCOUNTS RECEIVABLE The Company's receivables result primarily from the sale of transportation and logistics services. The Company performs ongoing credit evaluations of its customers and generally does not December 31, 2017 2016: 20 1 7 20 1 6 ( i n thousands) Billed $ 51,236 $ 48,538 Unbilled 9,154 8,599 Allowance for doubtful accounts (1,335 ) (994 ) Total accounts receivable —net $ 59,055 $ 56,143 An analysis of changes in the allowance for doubtful accounts for the years ended December 31, 2017, 2016, 2015 20 1 7 20 1 6 20 1 5 ( i n thousands) Balance —beginning of year $ 994 $ 549 $ 1,611 Provision for bad debts 341 445 151 Charge-offs - - (1,231 ) Recoveries - - 18 Balance —end of year $ 1,335 $ 994 $ 549

Note 3 - Marketable Equity Secu

Note 3 - Marketable Equity Securities	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]	3. MARKETABLE EQUITY SECURITIES The Company accounts for its marketable securities in accordance with ASC Topic 320, Investments-Debt and Equity Securities 320 Marketable equity securities classified as available-for-sale are carried at fair value, with the unrealized gains and losses, net of tax, included as a component of accumulated other comprehensive income (loss) in stockholders’ equity. Realized gains and losses, declines in value judged to be other-than-temporary on available-for-sale securities, and increases or decreases in value on trading securities, if any, are included in the determination of net income. A quarterly evaluation is performed in order to judge whether declines in value below cost should be considered temporary and when losses are deemed to be other-than-temporary. Several factors are considered in this evaluation process including the severity and duration of the decline in value, the financial condition and near-term outlook for the specific issuer and the Company’s ability to hold the securities. For the years ended December 31, 2017, 2016 2015, $42,000, $709,000 $833,000, The following table sets forth cost, market value and unrealized gain on equity securities classified as available-for- sale as of December 31, 2017 2016. no December 31, 2017 December 31, 2016. 201 7 201 6 (in thousands) Available-for-sale securities : Fair market value $ 26,664 $ 27,621 Cost 16,640 15,569 Unrealized gain $ 10,024 $ 12,052 The following table sets forth the gross unrealized gains and losses on the Company ’s marketable securities that are classified as available-for-sale as of December 31, 2017 2016. 201 7 201 6 (in thousands) Available-for-sale securities : Gross unrealized gains $ 10,150 $ 12,161 Gross unrealized losses 126 109 Net unrealized gains $ 10,024 $ 12,052 As of December 31, 201 7 2016, $7,444,000 $7,476,000, For the year ended December 31 , 2017 $1,507,000, December 31, 2016, $2,166,000, For the years ended December 31, 201 7, 2016 2015, $999,000, $1,024,000, $1,058,000 T here were no 2017 2016. The following table shows the Company ’s realized gains during 2017, 2016 2015 201 7 20 1 6 20 1 5 (in thousands) Realized gains : Sale proceeds $ 6,833 $ 1,550 $ 1,500 Cost of securities sold 2,098 547 434 Realized gains $ 4,735 $ 1,003 $ 1,066 Realized gains, net of taxes $ 2,938 $ 627 $ 654 At December 31, 201 7, $2,980,000 $126,000, December 31, 2016, $1,340,000 $109,000, December 31, 2017 2016, no twelve The market value of the Company ’s equity securities are periodically used as collateral against any outstanding margin account borrowings. As of December 31, 2017 2016, $5,903,000 $10,358,000 2.07% 1.30% December 31, 2017 2016,

Note 4 - Accrued Expenses and O

Note 4 - Accrued Expenses and Other Liabilities	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Accounts Payable and Accrued Liabilities Disclosure [Text Block]	4 . ACCRUED EXPENSES AND OTHER LIABILITIES Accrued expenses and other liabilities at December 31 20 1 7 20 1 6 ( i n thousands) Payroll $ 2,710 $ 2,427 Accrued vacation 1,762 1,862 Taxes —other than income 2,488 2,062 Interest 99 102 Driver escrows 2,381 2,245 Margin account borrowings 5,903 10,358 Self-insurance claims 2,266 3,274 Total accrued expenses and other liabilities $ 17,609 $ 22,330

Note 5 - Claims Liabilities

Note 5 - Claims Liabilities	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Liability for Future Policy Benefits and Unpaid Claims Disclosure [Text Block]	5 . CLAIMS LIABILITIES With respect to physical damage for trucks, cargo loss and auto liability, the Company maintains insurance coverage to protect it from certain business risks. These policies are with various carriers and have per occurrence deductibles of $12,500, $10,000 $2,500, October 1, 2013, October 1, 2013 September 30, 2015, $2,500 October 1, 2015, $500,000 $500,000 not not $521,000 $300,000 $325,000 not

Note 6 - Long-term Debt

Note 6 - Long-term Debt	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Long-term Debt [Text Block]	6. LONG-TERM DEBT Long-term debt at December 31, 201 7 201 6 (in thousands) Line of credit with a bank —due July 1, 2019, and - $ 1,866 Equipment financing (2) 172,636 165,331 Total long-term debt 172,636 167,197 Less current maturities (73,641 ) (42,806 ) Long-term debt —net of current maturities $ 98,995 $ 124,391 ( 1 Line of credit agreement with a bank provides for maximum borrowings of $40.0 contains certain restrictive covenants that must be maintained by the Company on a consolidated basis. Borrowings on the line of credit are at an interest rate of LIBOR as of the first 1.50% 2.86% December 31, 2017 4.00:1. 2017. December 31, 2017, $0.7 $0.7 $39.3 ( 2 Equipment financings consist of installment obligations for revenue equipment purchases, payable in various monthly installments with various maturity dates through December 2022, 2.52% December 31, 2017 The Company has provided letters of credit to third 706,000 December 31, 2017. third Scheduled annual maturities on long-term debt outstanding at December 31, 201 7, 201 8 $ 73,641 201 9 48,256 20 20 40,365 20 21 8,355 20 22 2,019 Total $ 172,636

Note 7 - Capital Stock

Note 7 - Capital Stock	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Stockholders' Equity Note Disclosure [Text Block]	7. CAPITAL STOCK The Company's authorized capital stock consists of 40,000,000 $.01 10,000,000 $.01 At December 31, 2017, 11,529,124 6,160,889 December 31, 2016, 11,510,863 6,396,803 No December 31, 2017 2016. Common Stock The holders of our common stock, subject to such rights as may one no , or cumulative voting rights. Preferred Stock Preferred stock may may dilution of the voting rights, net income per share and net book value of the common stock. As of December 31, 2017, no Treasury Stock In October 2017, 400,000 “2017 2% ed 126,060 2017 October 10, 2017 November 7, 2017. $27.00 $30.00 143,859 $30.00 $4.4 November 10, 2017. December 31, 2017. In February 2016, 325,000 “2016 March 2016, 325,000 425,000 2% 142,413 2016 February 18, 2016 April 5, 2016. $31.00 $34.00 567,413 $31.00 $17.7 April 5, 2016. December 31, 2016. In May 2015, 80,000 “2015 June 2015, 80,000 150,000 2% 148,566 2015 May 22, 2015 July 9, 2015. $59.00 $63.00 298,566 $59.00 $17.8 July 16, 2015. December 31, 2015. The Company ’s stock repurchase program has been extended and expanded several times, most recently in April 2017, 500,000 September 2011 110,316 2017. The Company accounts for Treasury stock using the cost method and as of December 31, 201 7, 5,368,235 $129,183,000.

Note 8 - Comprehensive Income (

Note 8 - Comprehensive Income (Loss)	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Comprehensive Income (Loss) Note [Text Block]	8. COMPREHENSIVE INCOME (LOSS) Comprehensive income (loss) was comprised of net income (loss) plus or minus market value adjustments related to marketable securities. The following table summarizes the changes in accumulated balances of other comprehensive income for the years ended December 31, 2017 2016: Unrealized gains and losses on available-for-sale securities (in thousands) Balance at January 1, 2016, net of tax of $3,250 $ 5,310 Other comprehensive income before reclassifications, net of tax of $ 1,390 2,269 Amounts reclassified from accumulated other comprehensive income, net of tax of $( 64) (103 ) Net other comprehensive income (loss) 2,166 Balance at December 31, 201 6, net of tax of $4,576 7,476 Other comprehensive income before reclassifications, net of tax of $ (687) 2,001 Amounts reclassified from accumulated other comprehensive income, net of tax of $( 1,310) (2,033 ) Net other comprehensive income (loss) (32 ) Balance at December 31, 201 7, net of tax of $2,579 $ 7,444 The following table provides details about reclassifications out of accumulated other comprehensive income for the years ended December 31, 2017 2016: Details about Accumulated Other Amounts Reclassified from Accumulated Other Comprehensive Income (a) Statement of Operations Comprehensive Income Component 201 7 201 6 Classification (in thousands) Unrealized gains and losses on available-for-sale securities: Unre alized gains and losses on securities sold $ 3,385 $ 876 Non-operating income Impairment expense (42 ) (709 ) Non-operating income Total before tax 3,343 167 Income before income taxes Tax expense (1,310 ) (64 ) Income tax expense Total after tax $ 2,033 $ 103 Net income (a) Amounts in parentheses indicate debits to profit/loss

Note 9 - Significant Customers

Note 9 - Significant Customers and Industry Concentration	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Concentration Risk Disclosure [Text Block]	9. SIGNIFICANT CUSTOMERS AND INDUSTRY CONCENTRATION In 201 7 2016 two 28% 2015, three 37% 2017, 2016 2015, 46%, 45% 47%, three $29,788,000 $27,085,000 December 31, 2017 2016,

Note 10 - Dividends

Note 10 - Dividends	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Dividend Payment Restrictions [Text Block]	10. DIVIDENDS The Company has paid cash dividends in the past; however, the Company currently intends to retain future earnings and does not

Note 11 - Federal and State Inc

Note 11 - Federal and State Income Taxes	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Income Tax Disclosure [Text Block]	11. FEDERAL AND STATE INCOME TAXES Under GAAP, deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and for income tax reporting purposes. Significant components of the Company ’s deferred tax liabilities and assets at December 31 201 7 201 6 (in thousands) Deferred tax liabilities: Property and equipment $ 60,388 $ 85,233 Unrealized gains on securities 2,580 4,576 Prepaid expenses and other 2,603 3,230 Total deferred tax liabilities 65,571 93,039 Deferred tax assets: Allowance for doubtful accounts 344 378 Alternative minimum tax credit carryforward - 1,214 QAFMV tax credit carryforward 864 864 New hire tax credit 124 124 Compensated absences 410 650 Self-insurance allowances 149 748 Share-based compensation 61 (54 ) Goodwill - 9 Marketable equity securities 750 1,244 Net operating loss carryover 7,975 7,545 Non-competition agreement - 7 Other 203 17 Total deferred tax assets 10,880 12,746 Net deferred tax liability $ 54,691 $ 80,293 The reconciliation between the effective income tax rate and the statutory Federal income tax rate for the years ended December 31, 2017, 2016 2015 201 7 201 6 201 5 (in thousands) Amount Percent Amount Percent Amount Percent Income tax at the statutory federal rate $ 4,975 34.0 $ 6,042 34.0 $ 11,876 34.0 Impact of the Tax Cut s and Jobs Act (29,255 ) (199.9 ) - - - - Nondeductible expenses 72 0.5 130 0.7 149 0.4 State income taxes/other —net (60 ) (0.5 ) 499 2.8 1,467 4.2 Total income tax (benefit) expense $ (24,268 ) (165.9 ) $ 6,671 37.5 $ 13,492 38.6 ________________ ( 1 On December 22, 2017, 35% 21% January 1, 2018 2018 2021. $29.3 fourth 2017 The (benefit) provision for income taxes consisted of the following: 201 7 201 6 201 5 (in thousands) Current: Federal $ (79 ) $ (225 ) $ 98 State 441 238 493 Total current income tax provision 362 13 591 Deferred: Federal (24,622 ) 5,506 10,782 State (8 ) 1,152 2,119 Total deferred income tax (benefit) provision (24,630 ) 6,658 12,901 Total income tax (benefit) expense $ (24,268 ) $ 6,671 $ 13,492 At December 31, 2017, $1,214,000 50% $988,000 December 31, 2017, 2030. $30,983,000 which begin to expire after the year 2030. In determining whether a tax asset valuation allowance is necessary, management, in accordance with the provisions of ASC 740 10 30, December 31, 201 7 2016, not The Company recognizes a tax benefit from an uncertain tax position only if it is more likely than not December 31, 201 7, not 2017 2016, not The Company and its subsidiaries are subject to U.S. and Canadian federal income tax laws as well as the income tax laws of multiple state jurisdictions. The major tax jurisdictions in which the Company operates generally provide for a deficiency assessment statute of limitation period of three ’s tax years 2014 The Company contracts with a third , we exchange, through our qualified intermediary, eligible trucks or trailers being disposed with trucks or trailers being acquired that allows us to generally carryover the tax basis of the trucks or trailers sold. The program is expected to result in a significant deferral of federal and state income taxes. Under the program, the proceeds from the sale of eligible trucks or trailers carry a Company-imposed restriction for the acquisition of replacement trucks or trailers. These proceeds may not December 31, 2017 2016, $29,000 $167,000 third

Note 12 - Stock-based Compensat

Note 12 - Stock-based Compensation	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Compensation and Employee Benefit Plans [Text Block]	12. STOCK-BASED COMPENSATION The Company maintains a stock incentive plan under which incentive and nonqualified stock options and other stock awards may March 2, 2006, ’s Board of Directors (the “Board”) adopted, and shareholders later approved, the 2006 “2006 2006 750,000 2006 March 13, 2014, May 29, 2014 2014 “2014 2006 2006 2014 2014 not 85% Outstanding nonqualified stock options at December 31, 201 7, five ten 20% 25% In April 2017, 100,000 ’s stock to the Company’s Chief Executive Officer. This restricted stock award has a grant date fair value of $16.38, one third three In March 2017, the Company granted 4,298 2014 $16.29 In March 2016, the Company granted 2,275 2014 $30.80 March 2016, 5,000 $30.81, 25% 25% three In March 2015, the Company granted 1,225 2014 $57.27 In November 2014, 9,500 ’s stock to certain key employees. This restricted stock award has a grant date fair value of $42.65, 20% 20% four In March 2014, the Company granted 3,024 2014 $19.88 In March 2013, 35,000 In May 2012, 104,000 20% In November 2010, 50,000 64,000 ed in increments of 20% four one 20% 2011. 2011, 4,442 third 2012. 59,558 not During 201 7 2016, no December 31, 2017, 440,000 The grant date fair value of stock and stock options vested during 201 7, 2016 2015 $256,000, $273,000 $274,000, $614,000 2017 $70,000 614 first 2017. $231,000 2017. $0.26 2017. December 31, 2017, $1,333,000 $644,000 2018, $552,000 2019 $137,000 2020. Total pre-tax stock-based compensation expense, recognized in Salaries, wages and benefits was approximately $ 302,000 2016 $70,000 325 first 2016. $113,000 2016. $0.03 $0.02 2016. Total pre-tax stock-based compensation expense, recognized in Salaries, wages and benefits was approximately $267,000 2015 $70,000 175 first 2015. $103,000 2015. $0.02 2015. Transactions in stock options under these plans are summarized as follows: Shares Under Option Weighted- Average Exercise Price Outstanding —January 1, 2015: 86,348 $ 11.09 Granted - - Exercised (20,250 ) 11.65 Canceled - - Outstanding —December 31, 2015: 66,098 $ 10.92 Granted - - Exercised (7,917 ) 11.41 Canceled (2,050 ) 10.91 Outstanding —December 31, 2016: 56,131 $ 10.85 Granted - - Exercised (11,063 ) 11.13 Canceled - - Outstanding —December 31, 2017: 45,068 $ 10.79 Options exercisable —December 31, 2017: 45,068 $ 10.79 Information related to the Company ’s option activity as of December 31, 2017, Shares Under Option Weighted- Average Exercise Price Weighted- Average Remaining Contractual Term Aggregate Intrinsic Value* (per share) (in years) Outstanding at January 1, 201 7 56,131 $ 10.85 Granted - - Exercised (11,063 ) 11.13 Canceled/forfeited/expired - - Outstanding at December 31, 201 7 45,068 $ 10.79 2.8 $ 1,065,600 Fully vested and exercisable at December 31, 201 7 45,068 $ 10.79 2.8 $ 1,065,600 ___________________________ * 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 our common stock, as determined by the closing price on December 29, 2017, $34.43. There were no 201 7, 2016, 2015. no 2017 2015. 2016 $6.07. The total intrinsic value of options exercised during the years ended December 31, 201 7, 2016 2015, $82,000, $101,000 $940,000, A summary of the status of the Company ’s nonvested options and restricted stock as of December 31, 2017 December 31, 2017, Stock Options Restricted Stock Number of Options Weighted- Average Grant Date Fair Value Number of Shares Weighted- Average Grant Date Fair Value* Nonvested at January 1, 201 7 12,800 $ 6.06 7,050 $ 36.35 Granted - - 104,298 16.38 Canceled/forfeited/expired - - - - Vested (12,800 ) 6.06 (7,198 ) 24.85 Nonvested at December 31, 201 7 - - 104,150 $ 17.14 ___________________________ * The weighted-average grant date fair value was based on the closing price of the Company ’s stock on the date of the grant. The number, weighted average exercise price and weighted average remaining contractual life of options outstanding as of December 31, 201 7 December 31, 2017 Exercise Price Shares Under Outstanding Options Weighted-Average Remaining Contractual Term Shares Under Exercisable Options (in years) $10.44 15,000 0.2 15,000 $10.90 24,600 4.4 24,600 $11.22 5,468 2.9 5,468 45,068 2.8 45,068 Cash received from option exercises totaled approximately $ 123,000, $91,000 $236,000 December 31, 2017, 2016 2015,

Note 13 - Earnings Per Share

Note 13 - Earnings Per Share	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Earnings Per Share [Text Block]	13. EARNINGS PER SHARE Basic earnings per common share was computed by dividing net income by the weighted average number of shares outstanding during the period. Diluted earnings per common share was calculated as follows: For the Year Ended December 31, 201 7 201 6 201 5 (in thousands, except per share data) Net income $ 38,899 $ 11,101 $ 21,436 Basic weighted average common shares outstanding 6,331 6,627 7,288 Dilutive effect of common stock equivalents 67 22 37 Diluted weighted average common shares outstanding 6,398 6,649 7,325 Basic earnings per share $ 6.14 $ 1.68 $ 2.94 Diluted earnings per share $ 6.08 $ 1.67 $ 2.93

Note 14 - Benefit Plan

Note 14 - Benefit Plan	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Pension and Other Postretirement Benefits Disclosure [Text Block]	14. BENEFIT PLAN The Company sponsors a benefit plan for the benefit of all eligible employees. The plan qualifies under Section 401 50% ’s voluntary contribution up to 3% 20% five $179,000, $161,000 $171,000 2017, 2016 2015,

Note 15 - Commitments and Conti

Note 15 - Commitments and Contingencies	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Commitments and Contingencies Disclosure [Text Block]	15. COMMITMENTS AND CONTINGENCIES Other than the lawsuit discussed below, the Company is not in the normal course of its business. We are a defendant in a collective-action lawsuit which was re-filed on December 9, 2016, , who are former drivers who worked for the Company during the period of December 6, 2013, may not During 2014 and 2015, 471 not 56 January 31, 2018. Leases for revenue equipment and certain premises under non-cancellable operating leases expire at various dates through 20 21. December 31, 2017 (in thousands) 201 8 $ 382 201 9 67 20 20 36 20 21 6 20 22 and thereafter - Total $ 491 Total rental expense, net of amounts reimbursed , for the years ended December 31, 2017, 2016 2015 $5,460,000, $10,294,000, $12,057,000,

Note 16 - Lease Income

Note 16 - Lease Income	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Lessor, Operating Leases [Text Block]	16. LEASE INCOME The Company has a lease-purchase program whereby we offer independent contractors the opportunity to lease a Company-owned truck. The terms associated with these leases require weekly lease payments over the term of the leases which range from 7 35 December 31, 2017 $42,206,000 $17,028,000, December 31, 2016 $44,691,000 $16,522,000, Leases in our lease-purchase program expire at various dates through 201 9. December 31, 2017 2016 $9,360,000 $5,935,000, The Company leases office and shop facilities to a related party. At December 31, 201 7, $1,697,000 $1,195,000, December 31, 2016, $1,697,000 $1,253,000, December 31, 2017 $12,000. 18

Note 17 - Fair Value of Financi

Note 17 - Fair Value of Financial Instruments	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Fair Value Disclosures [Text Block]	1 7. FAIR VALUE OF FINANCIAL INSTRUMENTS Our financial instruments consist of cash and cash equivalents, marketable equity securities, accounts receivable, trade accounts payable, and borrowings. The Company adopted guidance effective January 1, 2008 three may Level 1: Quoted market prices in active markets for identical assets or liabilities. Level 2: Inputs other than Level 1 not not Level 3: Unobservable inputs that are supported by little or no The Company utilizes the market approach to measure fair value for its financial assets and liabilities. The market approach uses prices and other relevant information generated by market transactions involving identical or comparable assets or liabilities. At December 31, 201 7, Total Level 1 Level 2 Level 3 (in thousands) Marketable equity securities $ 26,664 $ 26,664 - - During 201 7 2016, no The Company ’s investments in marketable equity securities are recorded at fair value based on quoted market prices. The carrying value of cash and cash equivalents, accounts receivable, trade accounts payable, and accrued liabilities approximate fair value due to their short maturities. The carrying amount for the line of credit approximates fair value because the line of credit interest rate is adjusted frequently. For long-term debt other than the lines of credit, the fair values are estimated using discounted cash flow analyses, based on the Company ’s current incremental borrowing rates for similar types of borrowing arrangements. The carrying values and estimated fair values of this other long-term debt at December 31, 2017 2016 201 7 201 6 Carrying Value Estimated Fair Value Carrying Value Estimated Fair Value (in thousands) Long-term debt $ 172,636 $ 171,289 $ 165,331 $ 163,975 The Company has not value option for any of our financial instruments.

Note 18 - Related Party Transac

Note 18 - Related Party Transactions	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Related Party Transactions Disclosure [Text Block]	1 8. RELATED PARTY TRANSACTIONS In the normal course of business, transactions for transportation and repair services, equipment, property leases and other services are conducted between the Company and companies affiliated with our Chairman and controlling stockholder. The Company recognized approximately $585,000, $4,834,000 $11,325,000 $7,497,000 $8,837,000 $4,834,000 2017, 2016, 2015, $67,500 2015. The Company purchased physical damage, auto liability, general liability , and workers’ compensation insurance through an unaffiliated insurance broker which was written by an insurance company affiliated with our Chairman and controlling stockholder. Premiums for physical damage coverage were approximately $1,808,000, $2,091,000 $2,467,000 2017, 2016, 2015, 2017, 2016, 2015 $10,860,000, $11,030,000, $9,605,000, 2017, 2016, 2015 $35,000, 21,000 $23,000, 2017, 2016, 2015 $286,000, $298,000 $276,000, Amounts owed to the Company by these affiliates were approximately $21,000 $929,000 December 31, 2017 2016, December 31, 2017 2016, $19,000 $925,000 $2,000 $4,000 third December 31, 2017 2016 $1,385,000 $472,000, December 31, 2017 2016 $971,000 $1,297,000

Note 19 - Quarterly Results of

Note 19 - Quarterly Results of Operations (Unaudited)	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Quarterly Financial Information [Text Block]	1 9. QUARTERLY RESULTS OF OPERATIONS (UNAUDITED) The tables below present quarterly financial information for 201 7 2016: 201 7 Three Months Ended March 31 June 30 September 30 December 31 (in thousands, except per share data) Operating revenues $ 109,405 $ 108,646 $ 108,899 $ 110,888 Operating expenses and costs 106,743 105,748 105,131 107,536 Operating income 2,662 2,898 3,768 3,352 Non-operating (loss) income 2,052 650 2,767 384 Interest expense (977 ) (935 ) (920 ) (1,070 ) Income tax (benefit) expense (1,454 ) (1,004 ) (2,169 ) 28,895 Net income $ 2,283 $ 1,609 $ 3,446 $ 31,561 Net income per common share: Basic $ 0.36 $ 0.25 $ 0.54 $ 5.07 Diluted $ 0.36 $ 0.25 $ 0.54 $ 5.00 Average common shares outstanding: Basic 6,399 6,381 6,326 6,219 Diluted 6,425 6,430 6,373 6,312 201 6 Three Months Ended March 31 June 30 September 30 December 31 (in thousands, except per share data) Operating revenues $ 103,589 $ 111,516 $ 109,393 $ 108,354 Operating expenses and costs 98,003 104,162 104,098 106,661 Operating income 5,586 7,354 5,295 1,693 Non-operating income (loss) (22 ) (10 ) 1,235 282 Interest expense (822 ) (910 ) (927 ) (982 ) Income tax expense (1,807 ) (2,442 ) (2,152 ) (270 ) Net income $ 2,935 $ 3,992 $ 3,451 $ 723 Net income per common share: Basic $ 0.41 $ 0.61 $ 0.54 $ 0.11 Diluted $ 0.41 $ 0.61 $ 0.53 $ 0.11 Average common shares outstanding: Basic 7,121 6,551 6,439 6,400 Diluted 7,145 6,572 6,458 6,425

Significant Accounting Policies

Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2017
Accounting Policies [Abstract]
Consolidation, Policy [Policy Text Block]	Description of Business and Principles of Consolidation –P.A.M. Transportation Services, Inc. (the “Company”), through its subsidiaries, operates as a truckload transportation and logistics company. The consolidated financial statements include the accounts of the Company and its wholly owned operating subsidiaries: P.A.M. Transport, Inc., P.A.M. Cartage Carriers, LLC, Overdrive Leasing, LLC, Choctaw Express, LLC, Decker Transport Co., LLC, T.T.X., LLC, Transcend Logistics, Inc., and East Coast Transport and Logistics, LLC. The following subsidiaries were inactive during all periods presented: P.A.M. International, Inc., P.A.M. Logistics Services, Inc., Choctaw Brokerage, Inc., and S & L Logistics, Inc.
Use of Estimates, Policy [Policy Text Block]	Use of Estimates –The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of any contingent assets and liabilities at the financial statement date and reported amounts of revenue and expenses during the reporting period. The Company periodically reviews these estimates and assumptions. The Company's estimates were based on its historical experience and various other assumptions that management believes to be reasonable under the circumstances. Actual results could differ from those estimates.
Cash and Cash Equivalents, Policy [Policy Text Block]	Cash and Cash Equivalents –The Company considers all highly liquid investments with a maturity of three may
Receivables, Policy [Policy Text Block]	Accounts Receivable and Allowance for Doubtful Accounts –Accounts receivable are presented in the Company’s consolidated financial statements net of an allowance for estimated uncollectible amounts. Management estimates this allowance based upon an evaluation of the aging of our customer receivables and historical write-offs, as well as other trends and factors surrounding the credit risk of specific customers. The Company continually updates the history it uses to make these estimates so as to reflect the most recent trends, factors and other information available. In order to gather information regarding these trends and factors, the Company also performs ongoing credit evaluations of its customers. Customer receivables are considered to be past due when payment has not may in future periods.
Bank Overdrafts [Policy Text Block]	Bank Overdrafts –The Company classifies bank overdrafts in current liabilities as accounts payable and does not not zero not December 31, 2017 2016 $4,377,000 $3,509,000,
Trade and Other Accounts Receivable, Policy [Policy Text Block]	Accounts Receivable Other –The components of accounts receivable other consist primarily of amounts representing company driver advances, independent contractor advances, equipment manufacturer warranties, and restricted cash. Advances receivable from company drivers as of December 31, 2017 2016, $448,000 $628,000, 11, 180
Marketable Securities, Policy [Policy Text Block]	Marketable Equity Securities – Marketable equity securities are classified by the Company as either available for sale or trading. Securities classified as available for sale are carried at market value with unrealized gains and losses recognized in accumulated other comprehensive income in the statements of stockholders’ equity. Securities classified as trading are carried at market value with unrealized gains and losses recognized in the statements of operations. Realized gains and losses are computed utilizing the specific identification method.
Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block]	Impairment of Long-Lived Assets –The Company reviews its long-lived assets for impairment whenever events or changes in circumstances indicate that the carrying amount of a long-lived asset may not not not
Property, Plant and Equipment, Policy [Policy Text Block]	Property and Equipment –Property and equipment is recorded at historical cost, less accumulated depreciation. For financial reporting purposes, the cost of such property is depreciated principally by the straight-line method. For tax reporting purposes, accelerated depreciation or applicable cost recovery methods are used. Depreciation is recognized over the estimated asset life, considering the estimated salvage value of the asset. Such salvage values are based on estimates using expected market values for used equipment and the estimated time of disposal which, in many cases include guaranteed residual values by the manufacturers. Gains and losses are reflected in the year of disposal. The following is a table reflecting estimated ranges of asset useful lives by major class of depreciable assets: Asset Class Estimated Asset Life (in years) Service vehicles 3 - 5 Office furniture and equipment 3 - 7 Revenue equipment 3 - 12 Structure s and improvements 5 - 40 The Company ’s management periodically evaluates whether changes to estimated useful lives and/or salvage values are necessary to ensure its estimates accurately reflect the economic use of the assets. During 2016, $2.7 $1.3 2017 2016, 2017, not
Inventory Supplies, Policy [Policy Text Block]	Inventory –Inventories consist primarily of revenue equipment parts, tires, supplies, and fuel. Inventories are carried at the lower of cost or market with cost determined using the first first
Prepaid Tires [Policy Text Block]	Prepaid Tires –Tires purchased with revenue equipment are capitalized as a cost of the related equipment. Replacement tires are included in prepaid expenses and deposits and are amortized over a 24
Advertising Costs, Policy [Policy Text Block]	Advertising Expense –Advertising costs are expensed as incurred and totaled approximately $1,087,000, $1,019,000 $988,000 December 31, 2017, 2016 2015,
Maintenance Cost, Policy [Policy Text Block]	Repairs and Maintenance –Repairs and maintenance costs are expensed as incurred.
Self Insurance Liability [Policy Text Block]	Self - Insurance Liability not
Income Tax, Policy [Policy Text Block]	Income Taxes –The Company applies the asset and liability method of accounting for income taxes, under which deferred taxes are determined based on the temporary differences between the financial statement and tax basis of assets and liabilities using tax rates expected to be in effect during the years in which the basis differences reverse. A valuation allowance is recorded when it is more likely than not not The application of income tax law to multi-jurisdictional operations such as those performed by the Company, are inherently complex. Laws and regulations in this area are voluminous and often ambiguous. As such, we may may We recognize the impact of tax positions in our financial statements. These tax positions must meet a more-likely-than- not not first no not first no In determining whether a tax asset valuation allowance is necessary, management, in accordance with the provisions of ASC 740 10 30, December 31, 201 7, not
Revenue Recognition, Policy [Policy Text Block]	Revenue Recognition –Revenue is recognized in full upon completion of delivery 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.
Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block]	S hare- Based Compensation 12
Earnings Per Share, Policy [Policy Text Block]	Earnings Per Share –The Company computes basic earnings per share (“EPS”) by dividing net income (loss) available to common stockholders by the weighted average number of common shares outstanding during the period. Diluted EPS includes the potential dilution that could occur from stock-based awards and other stock-based commitments using the treasury stock or the as if converted methods, as applicable. The difference between the Company's weighted-average shares outstanding and diluted shares outstanding is due to the dilutive effect of stock options for all periods presented. See Note 13
Fair Value Measurement, Policy [Policy Text Block]	Fair Value Measurements –Certain financial assets and liabilities are measured at fair value within the financial statements on a recurring basis. Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. The fair value hierarchy requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. For additional information with respect to fair value measurements, see Note 17
Segment Reporting, Policy [Policy Text Block]	Reporting Segment s 86.3%, 88.4% 87.6% twelve December 31, 2017, 2016 2015,
Concentration Risk, Credit Risk, Policy [Policy Text Block]	Concentrations of Credit Risk –The Company performs ongoing credit evaluations and generally does not
Subsequent Events, Policy [Policy Text Block]	Subsequent Events – We have evaluated subsequent events for recognition and disclosure through the date these financial statements were filed with the United States Securities and Exchange Commission and concluded that no
Foreign Currency Transactions and Translations Policy [Policy Text Block]	Foreign Currency Transactions –The functional currency of the Company’s foreign branch office in Mexico is the U.S. dollar. The Company remeasures the monetary assets and liabilities of this branch office, which are maintained in the local currency ledgers, at the rates of exchange in effect at the end of the reporting period. Revenues and expenses recorded in the local currency during the period are remeasured using average exchange rates for each period. Non-monetary assets and liabilities are remeasured using historical rates. Any resulting exchange gain or loss from the remeasurement process are included in non-operating income (loss) in the Company’s consolidated statements of operations.
New Accounting Pronouncements, Policy [Policy Text Block]	Recent Accounting Pronouncements – In May 2017, No. 2017 09, 2017 09" Compensation – Stock Compensation (Topic 718 718. 2017 09 December 15, 2017 2017 09 2017 09 not In November 2016, No. 2016 18, 2016 18” Statement of Cash Flows (Topic 230 2016 18 No. 2016 18 December 15, 2017, No. 2016 18 not In August 2016, No. 2016 15, 2016 15” Statement of Cash Flows (Topic 230 2016 15 230, eight December 15, 2017, 2016 15 not In June 2016, No. 2016 13, 2016 13” Accounting for Credit Losses (Topic 326 2016 13 2016 13 December 15, 2019, not In March 2016, No. 2016 09, 2016 09” Compensation – Stock Compensation (Topic 718 2016 09 2016 09 December 15, 2017, January 1, 2017, not In February 2016, 2016 02, 2016 02” Leases (Topic 842 twelve not In transition, lessees and lessors will be required to recognize and measure leases at the beginning of the earliest period presented using a modified retrospective approach. The modified retrospective approach includes a number of optional practical expedients that companies may December 15, 2018, not In January 2016, 2016 01, 2016 01” Financial Instruments - Overall (Subtopic 825 10 2016 01 December 15, 2017. not The Company has performed a preliminary analysis of the effects of adopting this guidance. This analysis consisted of the following items: ● categorize securities as either equity securities or debt securities, ● determine which securities held by the Company have readily determinable fair values, ● determine that the exit price notion will be used when measuring the fair value of financial instruments for disclosure purposes, ● consider the need for a valuation allowance related to a deferred tax asset on available-for-sale securities in combination with the Company ’s other deferred tax assets. Based upon this evaluation, the effects of adopting this guidance is not ’s financial condition or cash flows, but it is expected to have a significant impact on the Company’s results of operations through the recognition of increases or decreases in market value each reporting period rather than recognizing them through comprehensive income. In May 2014, No. 2014 09, 2014 09” Revenue from Contracts with Customers 2014 09 2014 09 1 2 3 4 5 2014 09 December 15, 2017 not December 31, 2016. 2014 09. The Company has performed an analysis of the effects of adopting this guidance. The analysis included the following items: ● identifying what constitutes a contract within the Company ’s business practices, ● identifying performance obligations within our contracts, ● determining transaction prices, ● allocating the transa ction price to performance obligations, ● determination of when performance obligations are satisfied and revenue is earned, ● disaggregation of revenue by source within segments, and ● principal vers us agent considerations. Based upon our evaluation, the adoption of ASU No. 2014 09 not

Note 1 - Accounting Policies (T

Note 1 - Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Property, Plant and Equipment [Table Text Block]	Asset Class Estimated Asset Life (in years) Service vehicles 3 - 5 Office furniture and equipment 3 - 7 Revenue equipment 3 - 12 Structure s and improvements 5 - 40

Note 2 - Trade Accounts Recei31

Note 2 - Trade Accounts Receivable (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]	20 1 7 20 1 6 ( i n thousands) Billed $ 51,236 $ 48,538 Unbilled 9,154 8,599 Allowance for doubtful accounts (1,335 ) (994 ) Total accounts receivable —net $ 59,055 $ 56,143
Schedule of Credit Losses Related to Financing Receivables, Current and Noncurrent [Table Text Block]	20 1 7 20 1 6 20 1 5 ( i n thousands) Balance —beginning of year $ 994 $ 549 $ 1,611 Provision for bad debts 341 445 151 Charge-offs - - (1,231 ) Recoveries - - 18 Balance —end of year $ 1,335 $ 994 $ 549

Note 3 - Marketable Equity Se32

Note 3 - Marketable Equity Securities (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Marketable Securities [Table Text Block]	201 7 201 6 (in thousands) Available-for-sale securities : Fair market value $ 26,664 $ 27,621 Cost 16,640 15,569 Unrealized gain $ 10,024 $ 12,052
Unrealized Gain (Loss) on Investments [Table Text Block]	201 7 201 6 (in thousands) Available-for-sale securities : Gross unrealized gains $ 10,150 $ 12,161 Gross unrealized losses 126 109 Net unrealized gains $ 10,024 $ 12,052
Schedule of Realized Gain (Loss) [Table Text Block]	201 7 20 1 6 20 1 5 (in thousands) Realized gains : Sale proceeds $ 6,833 $ 1,550 $ 1,500 Cost of securities sold 2,098 547 434 Realized gains $ 4,735 $ 1,003 $ 1,066 Realized gains, net of taxes $ 2,938 $ 627 $ 654

Note 4 - Accrued Expenses and33

Note 4 - Accrued Expenses and Other Liabilities (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Schedule of Accrued Liabilities [Table Text Block]	20 1 7 20 1 6 ( i n thousands) Payroll $ 2,710 $ 2,427 Accrued vacation 1,762 1,862 Taxes —other than income 2,488 2,062 Interest 99 102 Driver escrows 2,381 2,245 Margin account borrowings 5,903 10,358 Self-insurance claims 2,266 3,274 Total accrued expenses and other liabilities $ 17,609 $ 22,330

Note 6 - Long-term Debt (Tables

Note 6 - Long-term Debt (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Schedule of Long-term Debt Instruments [Table Text Block]	201 7 201 6 (in thousands) Line of credit with a bank —due July 1, 2019, and - $ 1,866 Equipment financing (2) 172,636 165,331 Total long-term debt 172,636 167,197 Less current maturities (73,641 ) (42,806 ) Long-term debt —net of current maturities $ 98,995 $ 124,391
Schedule of Maturities of Long-term Debt [Table Text Block]	201 8 $ 73,641 201 9 48,256 20 20 40,365 20 21 8,355 20 22 2,019 Total $ 172,636

Note 8 - Comprehensive Income35

Note 8 - Comprehensive Income (Loss) (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]	Unrealized gains and losses on available-for-sale securities (in thousands) Balance at January 1, 2016, net of tax of $3,250 $ 5,310 Other comprehensive income before reclassifications, net of tax of $ 1,390 2,269 Amounts reclassified from accumulated other comprehensive income, net of tax of $( 64) (103 ) Net other comprehensive income (loss) 2,166 Balance at December 31, 201 6, net of tax of $4,576 7,476 Other comprehensive income before reclassifications, net of tax of $ (687) 2,001 Amounts reclassified from accumulated other comprehensive income, net of tax of $( 1,310) (2,033 ) Net other comprehensive income (loss) (32 ) Balance at December 31, 201 7, net of tax of $2,579 $ 7,444
Reclassification out of Accumulated Other Comprehensive Income [Table Text Block]	Details about Accumulated Other Amounts Reclassified from Accumulated Other Comprehensive Income (a) Statement of Operations Comprehensive Income Component 201 7 201 6 Classification (in thousands) Unrealized gains and losses on available-for-sale securities: Unre alized gains and losses on securities sold $ 3,385 $ 876 Non-operating income Impairment expense (42 ) (709 ) Non-operating income Total before tax 3,343 167 Income before income taxes Tax expense (1,310 ) (64 ) Income tax expense Total after tax $ 2,033 $ 103 Net income

Note 11 - Federal and State I36

Note 11 - Federal and State Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]	201 7 201 6 (in thousands) Deferred tax liabilities: Property and equipment $ 60,388 $ 85,233 Unrealized gains on securities 2,580 4,576 Prepaid expenses and other 2,603 3,230 Total deferred tax liabilities 65,571 93,039 Deferred tax assets: Allowance for doubtful accounts 344 378 Alternative minimum tax credit carryforward - 1,214 QAFMV tax credit carryforward 864 864 New hire tax credit 124 124 Compensated absences 410 650 Self-insurance allowances 149 748 Share-based compensation 61 (54 ) Goodwill - 9 Marketable equity securities 750 1,244 Net operating loss carryover 7,975 7,545 Non-competition agreement - 7 Other 203 17 Total deferred tax assets 10,880 12,746 Net deferred tax liability $ 54,691 $ 80,293
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]	201 7 201 6 201 5 (in thousands) Amount Percent Amount Percent Amount Percent Income tax at the statutory federal rate $ 4,975 34.0 $ 6,042 34.0 $ 11,876 34.0 Impact of the Tax Cut s and Jobs Act (29,255 ) (199.9 ) - - - - Nondeductible expenses 72 0.5 130 0.7 149 0.4 State income taxes/other —net (60 ) (0.5 ) 499 2.8 1,467 4.2 Total income tax (benefit) expense $ (24,268 ) (165.9 ) $ 6,671 37.5 $ 13,492 38.6
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]	201 7 201 6 201 5 (in thousands) Current: Federal $ (79 ) $ (225 ) $ 98 State 441 238 493 Total current income tax provision 362 13 591 Deferred: Federal (24,622 ) 5,506 10,782 State (8 ) 1,152 2,119 Total deferred income tax (benefit) provision (24,630 ) 6,658 12,901 Total income tax (benefit) expense $ (24,268 ) $ 6,671 $ 13,492

Note 12 - Stock-based Compens37

Note 12 - Stock-based Compensation (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Share-based Compensation, Stock Options, Activity [Table Text Block]	Shares Under Option Weighted- Average Exercise Price Outstanding —January 1, 2015: 86,348 $ 11.09 Granted - - Exercised (20,250 ) 11.65 Canceled - - Outstanding —December 31, 2015: 66,098 $ 10.92 Granted - - Exercised (7,917 ) 11.41 Canceled (2,050 ) 10.91 Outstanding —December 31, 2016: 56,131 $ 10.85 Granted - - Exercised (11,063 ) 11.13 Canceled - - Outstanding —December 31, 2017: 45,068 $ 10.79 Options exercisable —December 31, 2017: 45,068 $ 10.79
Share-based Compensation, Activity [Table Text Block]	Shares Under Option Weighted- Average Exercise Price Weighted- Average Remaining Contractual Term Aggregate Intrinsic Value* (per share) (in years) Outstanding at January 1, 201 7 56,131 $ 10.85 Granted - - Exercised (11,063 ) 11.13 Canceled/forfeited/expired - - Outstanding at December 31, 201 7 45,068 $ 10.79 2.8 $ 1,065,600 Fully vested and exercisable at December 31, 201 7 45,068 $ 10.79 2.8 $ 1,065,600
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]	Stock Options Restricted Stock Number of Options Weighted- Average Grant Date Fair Value Number of Shares Weighted- Average Grant Date Fair Value* Nonvested at January 1, 201 7 12,800 $ 6.06 7,050 $ 36.35 Granted - - 104,298 16.38 Canceled/forfeited/expired - - - - Vested (12,800 ) 6.06 (7,198 ) 24.85 Nonvested at December 31, 201 7 - - 104,150 $ 17.14
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]	Exercise Price Shares Under Outstanding Options Weighted-Average Remaining Contractual Term Shares Under Exercisable Options (in years) $10.44 15,000 0.2 15,000 $10.90 24,600 4.4 24,600 $11.22 5,468 2.9 5,468 45,068 2.8 45,068

Note 13 - Earnings Per Share (T

Note 13 - Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	For the Year Ended December 31, 201 7 201 6 201 5 (in thousands, except per share data) Net income $ 38,899 $ 11,101 $ 21,436 Basic weighted average common shares outstanding 6,331 6,627 7,288 Dilutive effect of common stock equivalents 67 22 37 Diluted weighted average common shares outstanding 6,398 6,649 7,325 Basic earnings per share $ 6.14 $ 1.68 $ 2.94 Diluted earnings per share $ 6.08 $ 1.67 $ 2.93

Note 15 - Commitments and Con39

Note 15 - Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]	(in thousands) 201 8 $ 382 201 9 67 20 20 36 20 21 6 20 22 and thereafter - Total $ 491

Note 17 - Fair Value of Finan40

Note 17 - Fair Value of Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Fair Value, Assets Measured on Recurring Basis [Table Text Block]	Total Level 1 Level 2 Level 3 (in thousands) Marketable equity securities $ 26,664 $ 26,664 - -
Fair Value, by Balance Sheet Grouping [Table Text Block]	201 7 201 6 Carrying Value Estimated Fair Value Carrying Value Estimated Fair Value (in thousands) Long-term debt $ 172,636 $ 171,289 $ 165,331 $ 163,975

Note 19 - Quarterly Results o41

Note 19 - Quarterly Results of Operations (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Quarterly Financial Information [Table Text Block]	201 7 Three Months Ended March 31 June 30 September 30 December 31 (in thousands, except per share data) Operating revenues $ 109,405 $ 108,646 $ 108,899 $ 110,888 Operating expenses and costs 106,743 105,748 105,131 107,536 Operating income 2,662 2,898 3,768 3,352 Non-operating (loss) income 2,052 650 2,767 384 Interest expense (977 ) (935 ) (920 ) (1,070 ) Income tax (benefit) expense (1,454 ) (1,004 ) (2,169 ) 28,895 Net income $ 2,283 $ 1,609 $ 3,446 $ 31,561 Net income per common share: Basic $ 0.36 $ 0.25 $ 0.54 $ 5.07 Diluted $ 0.36 $ 0.25 $ 0.54 $ 5.00 Average common shares outstanding: Basic 6,399 6,381 6,326 6,219 Diluted 6,425 6,430 6,373 6,312 201 6 Three Months Ended March 31 June 30 September 30 December 31 (in thousands, except per share data) Operating revenues $ 103,589 $ 111,516 $ 109,393 $ 108,354 Operating expenses and costs 98,003 104,162 104,098 106,661 Operating income 5,586 7,354 5,295 1,693 Non-operating income (loss) (22 ) (10 ) 1,235 282 Interest expense (822 ) (910 ) (927 ) (982 ) Income tax expense (1,807 ) (2,442 ) (2,152 ) (270 ) Net income $ 2,935 $ 3,992 $ 3,451 $ 723 Net income per common share: Basic $ 0.41 $ 0.61 $ 0.54 $ 0.11 Diluted $ 0.41 $ 0.61 $ 0.53 $ 0.11 Average common shares outstanding: Basic 7,121 6,551 6,439 6,400 Diluted 7,145 6,572 6,458 6,425

Note 1 - Accounting Policies (D

Note 1 - Accounting Policies (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Bank Overdrafts	$ 4,377,000	$ 3,509,000
Due from Employees, Current	448,000	628,000
Increase in Depreciation Expense, As Result of Adjustments to Estimated Useful Lives and Salvage Values	$ 2,700,000	1,300,000
Period for Amortizing Prepaid Tires	2 years
Advertising Expense	$ 1,087,000	$ 1,019,000	$ 988,000
Truckload Services [Member] | Sales Revenue, Services, Net [Member] | Product Concentration Risk [Member]
Concentration Risk, Percentage	86.30%	88.40%	87.60%

Note 1 - Accounting Policies -

Note 1 - Accounting Policies - Useful Lives of Property and Equipment (Details)	12 Months Ended
	Dec. 31, 2017
Vehicles [Member] | Minimum [Member]
Property and equipment (Year)	3 years
Vehicles [Member] | Maximum [Member]
Property and equipment (Year)	5 years
Furniture and Fixtures [Member] | Minimum [Member]
Property and equipment (Year)	3 years
Furniture and Fixtures [Member] | Maximum [Member]
Property and equipment (Year)	7 years
Machinery and Equipment [Member] | Minimum [Member]
Property and equipment (Year)	3 years
Machinery and Equipment [Member] | Maximum [Member]
Property and equipment (Year)	12 years
Building and Building Improvements [Member] | Minimum [Member]
Property and equipment (Year)	5 years
Building and Building Improvements [Member] | Maximum [Member]
Property and equipment (Year)	40 years

Note 2 - Trade Accounts Recei44

Note 2 - Trade Accounts Receivable - Accounts Receivable Balances (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Billed	$ 51,236	$ 48,538
Unbilled	9,154	8,599
Allowance for doubtful accounts	(1,335)	(994)	$ (549)	$ (1,611)
Total accounts receivable—net	$ 59,055	$ 56,143

Note 2 - Trade Accounts Recei45

Note 2 - Trade Accounts Receivable - Changes in Allowance for Doubtful Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Balance—beginning of year	$ 994	$ 549	$ 1,611
Provision for bad debts	341	445	151
Charge-offs			(1,231)
Recoveries			18
Balance—end of year	$ 1,335	$ 994	$ 549

Note 3 - Marketable Equity Se46

Note 3 - Marketable Equity Securities (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities	$ 42,000	$ 709,000	$ 833,000
Trading Securities	0	0
Accumulated Other Comprehensive Income (Loss), Net of Tax	7,444,000	7,476,000
Available-for-Sale Securities Net Unrealized Holding Gain (Loss), Net of Tax	1,507,000	2,166,000
Investment Income, Dividend	999,000	1,024,000	$ 1,058,000
Marketable Securities, Reclassification	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	2,980,000	1,340,000
Available-for-sale Equity Securities, Gross Unrealized Loss	126,000	109,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	0	0
Trading Securities Pledged as Collateral	$ 5,903,000	$ 10,358,000
Debt, Weighted Average Interest Rate	2.07%	1.30%
Available-for-sale Securities [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ 7,444,000	$ 7,476,000

Note 3 - Marketable Equity Se47

Note 3 - Marketable Equity Securities - Securities Classified As Available-for-sale (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Available-for-sale securities:
Fair market value	$ 26,664	$ 27,621
Cost	16,640	15,569
Unrealized gain	$ 10,024	$ 12,052

Note 3 - Marketable Equity Se48

Note 3 - Marketable Equity Securities - Unrealized Gains and Losses On Available-for-sale Securities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Available-for-sale securities:
Gross unrealized gains	$ 10,150	$ 12,161
Gross unrealized losses	126	109
Net unrealized gains	$ 10,024	$ 12,052

Note 3 - Marketable Equity Se49

Note 3 - Marketable Equity Securities - Realized Gains on Available-for-sale Securities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Realized gains:
Sale proceeds	$ 6,833	$ 1,550	$ 1,500
Cost of securities sold	2,098	547	434
Realized gains	4,735	1,003	1,066
Realized gains, net of taxes	$ 2,938	$ 627	$ 654

Note 4 - Accrued Expenses and50

Note 4 - Accrued Expenses and Other Liabilities - Accrued Expenses and Other Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Payroll	$ 2,710	$ 2,427
Accrued vacation	1,762	1,862
Taxes—other than income	2,488	2,062
Interest	99	102
Driver escrows	2,381	2,245
Margin account borrowings	5,903	10,358
Self-insurance claims	2,266	3,274
Total accrued expenses and other liabilities	$ 17,609	$ 22,330

Note 5 - Claims Liabilities (De

Note 5 - Claims Liabilities (Details Textual)	Dec. 31, 2017USD ($)
Workers Compensation Self Insured Retention	$ 500,000
Workers Compensation Per Occurrence Excess Policy	500,000
Letters of Credit Outstanding, Amount	706,000
Stop Loss for Self Insurance for Employee Health Claims Per Covered Employee Per Year	325,000
Truck Coverage [Member]
Per Occurrence Deductibles	12,500
Cargo Loss Coverage [Member]
Per Occurrence Deductibles	10,000
Auto Liability Coverage [Member]
Per Occurrence Deductibles	2,500
Trailers [Member]
Per Occurrence Deductibles	2,500
Workers Compensation Coverage [Member]
Letters of Credit Outstanding, Amount	521,000
Certificates of Deposit, at Carrying Value	$ 300,000

Note 6 - Long-term Debt (Detail

Note 6 - Long-term Debt (Details Textual)	12 Months Ended
	Dec. 31, 2017USD ($)
Line of Credit Facility, Interest Rate at Period End	2.86%
Letters of Credit Outstanding, Amount	$ 706,000
Line of Credit [Member]
Debt Instrument, Face Amount	$ 40,000,000
Ratio of Indebtedness to Net Capital	4
Line of Credit Facility, Outstanding Advances	$ 700,000
Letters of Credit Outstanding, Amount	700,000
Line of Credit Facility, Remaining Borrowing Capacity	$ 39,300,000
Line of Credit [Member] | Equipment Financing [Member]
Long-term Debt, Weighted Average Interest Rate, at Point in Time	2.52%
Line of Credit [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Basis Spread on Variable Rate	1.50%

Note 6 - Long-term Debt - Summa

Note 6 - Long-term Debt - Summary of Long-term Debt (Details) - USD ($) $ in Thousands		Dec. 31, 2017	Dec. 31, 2016
Line of credit with a bank—due July 1, 2019, and collateralized by accounts receivable (1)		$ 172,636	$ 167,197
Less current maturities		(73,641)	(42,806)
Long-term debt—net of current maturities		98,995	124,391
Line of Credit [Member]
Line of credit with a bank—due July 1, 2019, and collateralized by accounts receivable (1)	[1]		1,866
Secured Debt [Member]
Line of credit with a bank—due July 1, 2019, and collateralized by accounts receivable (1)	[2]	$ 172,636	$ 165,331
[1]	Line of credit agreement with a bank provides for maximum borrowings of $40.0 million and contains certain restrictive covenants that must be maintained by the Company on a consolidated basis. Borrowings on the line of credit are at an interest rate of LIBOR as of the first day of the month plus 1.50% (2.86% at December 31, 2017) and are secured by our trade accounts receivable. Monthly payments of interest are required under this agreement. Also, under the terms of the agreement the Company must maintain a debt to EBITDA (earnings before interest, taxes, depreciation, and amortization) ratio of less than 4.00:1. The Company was in compliance with all provisions under this agreement throughout 2017. At December 31, 2017, outstanding advances on the line were approximately $0.7 million, consisting entirely of letters of credit totaling $0.7 million, with availability to borrow $39.3 million.
[2]	Equipment financings consist of installment obligations for revenue equipment purchases, payable in various monthly installments with various maturity dates through December 2022, at a weighted average interest rate of 2.52% as of December 31, 2017 and collateralized by revenue equipment.

Note 6 - Long-term Debt - Annua

Note 6 - Long-term Debt - Annual Maturities on Long-term Debt Outstanding (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
2,018	$ 73,641
2,019	48,256
2,020	40,365
2,021	8,355
2,022	2,019
Total	$ 172,636	$ 167,197

Note 7 - Capital Stock (Details

Note 7 - Capital Stock (Details Textual) - USD ($)	1 Months Ended				2 Months Ended	12 Months Ended
	Nov. 10, 2017	Oct. 31, 2017	Feb. 29, 2016	May 31, 2015	Apr. 05, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Apr. 30, 2017	Mar. 31, 2016	Jun. 30, 2015
Common Stock, Shares Authorized						40,000,000	40,000,000
Common Stock, Par or Stated Value Per Share						$ 0.01	$ 0.01
Preferred Stock, Shares Authorized						10,000,000	10,000,000
Preferred Stock, Par or Stated Value Per Share						$ 0.01	$ 0.01
Common Stock, Shares, Issued						11,529,124	11,510,863
Common Stock, Shares, Outstanding						6,160,889	6,396,803
Preferred Stock, Shares Issued						0	0
Treasury Stock, Value, Acquired, Cost Method						$ 6,348,000	$ 21,056,000	$ 19,278,000
Treasury Stock, Shares						5,368,235	5,114,060
Treasury Stock, Value						$ 129,183,000	$ 122,835,000
Preferred Stock, Shares Outstanding						0	0
The 2017 Tender Offer [Member]
Stock Repurchase Program, Number of Shares Authorized to be Repurchased		400,000
Stock Repurchase Program Additional Shares Authroized To Be Repurchased Percent Of Outstanding Shares Percent		2.00%
Stock Repurchase Program Additional Shares Authorized To Be Repurchased Percent Of Outstanding Shares, Shares		126,060
Treasury Stock, Shares, Acquired	143,859
Treasury Stock Acquired, Average Cost Per Share	$ 30
Treasury Stock, Value, Acquired, Cost Method	$ 4,400,000
The 2017 Tender Offer [Member] | Minimum [Member]
Treasury Stock Acquired Cost Per Share	$ 27
The 2017 Tender Offer [Member] | Maximum [Member]
Treasury Stock Acquired Cost Per Share	$ 30
The 2016 Tender Offer [Member]
Stock Repurchase Program, Number of Shares Authorized to be Repurchased			325,000							425,000
Stock Repurchase Program Additional Shares Authroized To Be Repurchased Percent Of Outstanding Shares Percent			2.00%
Stock Repurchase Program Additional Shares Authorized To Be Repurchased Percent Of Outstanding Shares, Shares			142,413
Treasury Stock, Shares, Acquired					567,413
Treasury Stock Acquired, Average Cost Per Share					$ 31
Treasury Stock, Value, Acquired, Cost Method					$ 17,700,000
The 2016 Tender Offer [Member] | Minimum [Member]
Treasury Stock Acquired Cost Per Share			$ 31
The 2016 Tender Offer [Member] | Maximum [Member]
Treasury Stock Acquired Cost Per Share			$ 34
The 2015 Tender Offer [Member]
Stock Repurchase Program, Number of Shares Authorized to be Repurchased				80,000							150,000
Stock Repurchase Program Additional Shares Authroized To Be Repurchased Percent Of Outstanding Shares Percent				2.00%
Stock Repurchase Program Additional Shares Authorized To Be Repurchased Percent Of Outstanding Shares, Shares				148,566
Treasury Stock Acquired Cost Per Share				$ 59
Treasury Stock, Shares, Acquired				298,566
Treasury Stock, Value, Acquired, Cost Method				$ 17,800,000
The 2015 Tender Offer [Member] | Minimum [Member]
Treasury Stock Acquired Cost Per Share				$ 59
The 2015 Tender Offer [Member] | Maximum [Member]
Treasury Stock Acquired Cost Per Share				$ 63
September 2011 Reauthorization [Member]
Stock Repurchase Program, Number of Shares Authorized to be Repurchased									500,000
Treasury Stock, Shares, Acquired						110,316

Note 8 - Comprehensive Income56

Note 8 - Comprehensive Income (Loss) - Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Balance, beginning of period	$ 7,476
Net other comprehensive income (loss)	(32)	$ 2,166	$ (1,092)
Balance, end of period	7,444	7,476
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]
Balance, beginning of period	7,476	5,310
Other comprehensive income before reclassifications	2,001	2,269
Amounts reclassified from accumulated other comprehensive income, net of tax benefit	(2,033)	(103)
Net other comprehensive income (loss)	(32)	2,166
Balance, end of period	$ 7,444	$ 7,476	$ 5,310

Note 8 - Comprehensive Income57

Note 8 - Comprehensive Income (Loss) - Accumulated Other Comprehensive Income (Loss) (Details) (Parentheticals) - Accumulated Net Investment Gain (Loss) Attributable to Parent [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
AOCI tax, balance	$ 2,579	$ 4,576	$ 3,250
OCI before reclassifications, tax	(687)	1,390
Reclassification from AOCI, tax	$ (1,310)	$ (64)

Note 8 - Comprehensive Income58

Note 8 - Comprehensive Income (Loss) - Reclassification Out of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
		Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017		Dec. 31, 2016	Dec. 31, 2015
NON-OPERATING INCOME		$ 384	$ 2,767	$ 650	$ 2,052	$ 282	$ 1,235	$ (10)	$ (22)	$ 5,853		$ 1,485	$ 1,516
Total before tax										14,631		17,772	34,928
Tax expense		(28,895)	2,169	1,004	1,454	270	2,152	2,442	1,807	24,268		(6,671)	(13,492)
NET INCOME		$ 31,561	$ 3,446	$ 1,609	$ 2,283	$ 723	$ 3,451	$ 3,992	$ 2,935	38,899		11,101	$ 21,436
Reclassification out of Accumulated Other Comprehensive Income [Member]
Total before tax	[1]									3,343		167
Tax expense										(1,310)	[1]	(64)
NET INCOME	[1]									2,033		103
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]
NON-OPERATING INCOME	[1]									3,385		876
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Other-than-Temporary Impairment Attributable to Parent [Member]
NON-OPERATING INCOME	[1]									$ (42)		$ (709)
[1]	Amounts in parentheses indicate debits to profit/loss

Note 9 - Significant Customer59

Note 9 - Significant Customers and Industry Concentration (Details Textual) - Customer Concentration Risk [Member] - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Sales Revenue, Services, Net [Member]
Concentration Risk, Percentage	28.00%	28.00%	37.00%
Revenue Provided to the Automobile Manufacturing Industry [Member]
Concentration Risk, Percentage	46.00%	45.00%	47.00%
Accounts Receivable [Member]
Accounts Receivable, Gross, Current	$ 29,788,000	$ 27,085,000

Note 11 - Federal and State I60

Note 11 - Federal and State Income Taxes (Details Textual) - USD ($)	3 Months Ended	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent			34.00%	34.00%	34.00%
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability	$ 29,300,000
Income Taxes Receivable	1,214,000		$ 1,214,000
Deferred Tax Assets, Tax Credit Carryforwards, General Business	988,000		988,000
Operating Loss Carryforwards	30,983,000		30,983,000
Deferred Tax Assets, Valuation Allowance	0		0	$ 0
Income Tax Examination, Penalties and Interest Expense			$ 0	0
Statute of Limitations			3 years
Receivables, Long-term Contracts or Programs	$ 29,000		$ 29,000	$ 167,000
Scenario, Forecast [Member]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent		21.00%

Note 11 - Federal and State I61

Note 11 - Federal and State Income Taxes - Significant Components of Deferred Tax Liabilities and Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Deferred tax liabilities:
Property and equipment	$ 60,388	$ 85,233
Unrealized gains on securities	2,580	4,576
Prepaid expenses and other	2,603	3,230
Total deferred tax liabilities	65,571	93,039
Deferred tax assets:
Allowance for doubtful accounts	344	378
Alternative minimum tax credit carryforward		1,214
QAFMV tax credit carryforward	864	864
New hire tax credit	124	124
Compensated absences	410	650
Self-insurance allowances	149	748
Share-based compensation	61
Share-based compensation		(54)
Goodwill		9
Marketable equity securities	750	1,244
Net operating loss carryover	7,975	7,545
Non-competition agreement		7
Other	203	17
Total deferred tax assets	10,880	12,746
Net deferred tax liability	$ 54,691	$ 80,293

Note 11 - Federal and State I62

Note 11 - Federal and State Income Taxes - Income Tax Rate Reconciliation (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income tax at the statutory federal rate, amount									$ 4,975,000	$ 6,042,000	$ 11,876,000
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent									34.00%	34.00%	34.00%
Impact of the Tax Cuts and Jobs Act, amount									$ (29,255)
Impact of the Tax Cuts and Jobs Act, percent									(199.90%)
Nondeductible expenses, amount									$ 72,000	$ 130,000	$ 149,000
Nondeductible expenses, percent									0.50%	0.70%	0.40%
State income taxes/other—net of federal benefit, amount									$ (60,000)	$ 499,000	$ 1,467,000
State income taxes/other—net of federal benefit, percent									(0.50%)	2.80%	4.20%
Total income tax (benefit) expense	$ 28,895,000	$ (2,169,000)	$ (1,004,000)	$ (1,454,000)	$ (270,000)	$ (2,152,000)	$ (2,442,000)	$ (1,807,000)	$ (24,268,000)	$ 6,671,000	$ 13,492,000
Total income tax (benefit) expense, percent									(165.90%)	37.50%	38.60%

Note 11 - Federal and State I63

Note 11 - Federal and State Income Taxes - Components of Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Current:
Federal									$ (79)	$ (225)	$ 98
State									441	238	493
Total current income tax provision									362	13	591
Deferred:
Federal									(24,622)	5,506	10,782
State									(8)	1,152	2,119
Total deferred income tax (benefit) provision									(24,630)	6,658	12,901
Total income tax (benefit) expense	$ 28,895	$ (2,169)	$ (1,004)	$ (1,454)	$ (270)	$ (2,152)	$ (2,442)	$ (1,807)	$ (24,268)	$ 6,671	$ 13,492

Note 12 - Stock-based Compens64

Note 12 - Stock-based Compensation (Details Textual) - USD ($)		Mar. 02, 2006	Apr. 30, 2017	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015	Nov. 30, 2014	Mar. 31, 2014	Mar. 31, 2013	May 31, 2012	Nov. 30, 2010	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2017		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2011	Dec. 29, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross															0		0	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value															$ 256,000		$ 273,000	$ 274,000
Allocated Share-based Compensation Expense															614,000		302,000	267,000
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense															$ 231,000		$ 113,000	$ 103,000
Allocated Share-based Compensation Expense, Impact on Earnings Per Share, Basic and Diluted															$ 0.26			$ 0.02
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized															$ 1,333,000
Allocated Share-based Compensation Expense, Impact on Earnings Per Share, Diluted																	$ 0.03
Allocated Share-based Compensation Expense, Impact on Earnings Per Share, Basic																	0.02
Share Price																				$ 34.43
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value															$ 0		$ 6.07	$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value															$ 82,000		$ 101,000	$ 940,000
Proceeds from Stock Options Exercised															123,000		$ 91,000	$ 236,000
Amortization Year 2 [Member]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized															644,000
Amortization, Year 3 [Member]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized															552,000
Amortization, Year 4 [Member]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized															$ 137,000
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage							20.00%
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period							9,500								104,298
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value							$ 42.65								$ 16.38	[1]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value	[1]
Nonqualified Options [Member] | Key Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross										104,000	50,000
Share-based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period, Percentage										20.00%	20.00%
Nonqualified Options [Member] | Annual Grant to Non-employee [Member]
Allocated Share-based Compensation Expense												$ 70,000	$ 70,000	$ 70,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Grants in Period												614	325	175
Performance Based Variable Nonqualified Stock Options [Member]
Share-based Compensation Arrangement By Share-based Payment Award, Performance Awards Earned																			4,442
Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period																			59,558
Performance Based Variable Nonqualified Stock Options [Member] | Key Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage											20.00%
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross											64,000
The 2006 Stock Option Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized		750,000
The 2014 Stock Option Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant															440,000
The 2014 Stock Option Plan [Member] | Restricted Stock [Member] | Chief Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period			100,000		5,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value			$ 16.38		$ 30.81
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period			3 years
The 2014 Stock Option Plan [Member] | Restricted Stock [Member] | Chief Executive Officer [Member] | Share-based Compensation Award, Tranche One [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage					25.00%
The 2014 Stock Option Plan [Member] | Restricted Stock [Member] | Chief Executive Officer [Member] | Share-based Compensation Award, Tranche Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage					25.00%
The 2014 Stock Option Plan [Member] | Restricted Stock [Member] | Chief Executive Officer [Member] | Share-based Compensation Award, Tranche Three [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage					25.00%
The 2014 Stock Option Plan [Member] | Restricted Stock [Member] | Chief Executive Officer [Member] | Share-based Compensation Award, Tranche Four [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage					25.00%
The 2014 Stock Option Plan [Member] | Nonqualified Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross															0		0
The 2014 Stock Option Plan [Member] | Stock Award [Member] | Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period				4,298	2,275	1,225		3,024
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value				$ 16.29	$ 30.80	$ 57.27		$ 19.88
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross									35,000
The 2014 Stock Option Plan [Member] | Minimum [Member] | Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent		85.00%
The 2014 Stock Option Plan [Member] | Minimum [Member] | Nonqualified Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period															5 years
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage															20.00%
The 2014 Stock Option Plan [Member] | Maximum [Member] | Nonqualified Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period															10 years
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage															25.00%
[1]	The weighted-average grant date fair value was based on the closing price of the Company's stock on the date of the grant.

Note 12 - Stock-based Compens65

Note 12 - Stock-based Compensation - Employee Stock Option Activity (Details) - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Outstanding (in shares)	56,131	66,098	86,348
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period
Exercised (in shares)	(11,063)	(7,917)	(20,250)
Canceled (in shares)		(2,050)
Outstanding (in shares)	45,068	56,131	66,098
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	0	0	0
Options exercisable (in shares)	45,068
Outstanding (in dollars per share)	$ 10.85	$ 10.92	$ 11.09
Granted (in dollars per share)
Exercised (in dollars per share)	11.13	11.41	11.65
Canceled (in dollars per share)		10.91
Outstanding (in dollars per share)	10.79	$ 10.85	$ 10.92
Options exercisable (in dollars per share)	$ 10.79

Note 12 - Stock-based Compens66

Note 12 - Stock-based Compensation - Stock Option Activity (Details) - USD ($)		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Outstanding (in shares)		56,131	66,098	86,348
Granted (in shares)		0	0	0
Exercised (in shares)		(11,063)	(7,917)	(20,250)
Canceled/forfeited/expired (in shares)
Outstanding (in shares)		45,068	56,131	66,098
Options exercisable (in shares)		45,068
Outstanding (in dollars per share)		$ 10.85	$ 10.92	$ 11.09
Granted (in dollars per share)
Exercised (in dollars per share)		11.13	11.41	11.65
Canceled/forfeited/expired (in dollars per share)
Outstanding (in dollars per share)		10.79	$ 10.85	$ 10.92
Fully vested and exercisable (in dollars per share)		$ 10.79
Outstanding (Year)		2 years 292 days
Fully vested and exercisable (Year)		2 years 292 days
Outstanding	[1]	$ 1,065,600
Fully vested and exercisable	[1]	$ 1,065,600
[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 our common stock, as determined by the closing price on December 29, 2017, was $34.43.

Note 12 - Stock-based Compens67

Note 12 - Stock-based Compensation - Summary of Nonvested Options and Restricted Stock (Details) - $ / shares		1 Months Ended	12 Months Ended
		Nov. 30, 2014	Dec. 31, 2017		Dec. 31, 2016	Dec. 31, 2015
Granted, restricted stock (in shares)
Granted - weighted average grant date fair value , restricted stock (in dollars per share)
Canceled/forfeited/expired - weighted average grant date fair value, restricted stock (in dollars per share)			$ 0		$ 6.07	$ 0
Employee Stock Option [Member]
Nonvested, stock options (in shares)			12,800
Canceled/forfeited/expired, stock options (in shares)
Vested, stock options (in shares)			(12,800)
Nonvested, stock options (in shares)					12,800
Nonvested - weighted average grant date fair value, stock options (in dollars per share)			$ 6.06
Canceled/forfeited/expired - weighted average grant date fair value, stock options (in dollars per share)
Vested - weighted average grant date fair value, stock options (in dollars per share)			6.06
Nonvested - weighted average grant date fair value, stock options (in dollars per share)					$ 6.06
Restricted Stock [Member]
Nonvested, restricted stock (in shares)			7,050
Granted, restricted stock (in shares)		9,500	104,298
Canceled/forfeited/expired, restricted stock (in shares)
Vested, restricted stock (in shares)			(7,198)
Nonvested, restricted stock (in shares)			104,150		7,050
Nonvested - weighted average grant date fair value, restricted stock (in dollars per share)	[1]		$ 36.35
Granted - weighted average grant date fair value , restricted stock (in dollars per share)		$ 42.65	16.38	[1]
Canceled/forfeited/expired - weighted average grant date fair value, restricted stock (in dollars per share)	[1]
Vested - weighted average grant date fair value, restricted stock (in dollars per share)	[1]		24.85
Nonvested - weighted average grant date fair value, restricted stock (in dollars per share)	[1]		$ 17.14		$ 36.35
[1]	The weighted-average grant date fair value was based on the closing price of the Company's stock on the date of the grant.

Note 12 - Stock-based Compens68

Note 12 - Stock-based Compensation - Stock Option Activity by Exercise Price (Details)	12 Months Ended
	Dec. 31, 2017$ / sharesshares
Exercise price (in dollars per share) | $ / shares
Shares under outstanding options (in shares)	45,068
Weighted-average remaining contractual term (Year)	2 years 292 days
Shares under exercisable options (in shares)	45,068
Exercise Price 1 [Member]
Exercise price (in dollars per share) | $ / shares	$ 10.44
Shares under outstanding options (in shares)	15,000
Weighted-average remaining contractual term (Year)	73 days
Shares under exercisable options (in shares)	15,000
Exercise Price 2 [Member]
Exercise price (in dollars per share) | $ / shares	$ 10.90
Shares under outstanding options (in shares)	24,600
Weighted-average remaining contractual term (Year)	4 years 146 days
Shares under exercisable options (in shares)	24,600
Exercise Price 3 [Member]
Exercise price (in dollars per share) | $ / shares	$ 11.22
Shares under outstanding options (in shares)	5,468
Weighted-average remaining contractual term (Year)	2 years 328 days
Shares under exercisable options (in shares)	5,468

Note 13 - Earnings Per Share -

Note 13 - Earnings Per Share - Computations of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Net income									$ 38,899	$ 11,101	$ 21,436
Basic (in shares)	6,219	6,326	6,381	6,399	6,400	6,439	6,551	7,121	6,331	6,627	7,288
Dilutive effect of common stock equivalents (in shares)									67	22	37
Diluted weighted average common shares outstanding (in shares)	6,312	6,373	6,430	6,425	6,425	6,458	6,572	7,145	6,398	6,649	7,325
Basic (in dollars per share)	$ 5.07	$ 0.54	$ 0.25	$ 0.36	$ 0.11	$ 0.54	$ 0.61	$ 0.41	$ 6.14	$ 1.68	$ 2.94
Diluted (in dollars per share)	$ 5	$ 0.54	$ 0.25	$ 0.36	$ 0.11	$ 0.53	$ 0.61	$ 0.41	$ 6.08	$ 1.67	$ 2.93

Note 14 - Benefit Plan (Details

Note 14 - Benefit Plan (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Defined Contribution Plan, Employer Matching Contribution, Percent of Match	50.00%
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	3.00%
Defined Contribution Plan, Employers Matching Contribution, Annual Vesting Percentage	20.00%
Defined Contribution, Fully Vested Period	5 years
Defined Contribution Plan, Cost	$ 179,000	$ 161,000	$ 171,000

Note 15 - Commitments and Con71

Note 15 - Commitments and Contingencies (Details Textual)	12 Months Ended
	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)	Dec. 31, 2014
Operating Leases Number of Trucks	56		471	471
Operating Leases, Rent Expense	$ 5,460,000	$ 10,294,000	$ 12,057,000

Note 15 - Commitments and Con72

Note 15 - Commitments and Contingencies - Future Minimum Annual Lease Payments (Details) $ in Thousands	Dec. 31, 2017USD ($)
2,018	$ 382
2,019	67
2,020	36
2,021	6
2022 and thereafter
Total	$ 491

Note 16 - Lease Income (Details

Note 16 - Lease Income (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Trucks [Member]
Property Subject to or Available for Operating Lease, Gross	$ 42,206,000	$ 44,691,000
Property Subject to or Available for Operating Lease, Net	17,028,000	16,522,000
Operating Leases, Future Minimum Payments Receivable	$ 9,360,000	5,935,000
Trucks [Member] | Minimum [Member]
Lessor, Operating Lease, Term of Contract	210 days
Trucks [Member] | Maximum [Member]
Lessor, Operating Lease, Term of Contract	2 years 330 days
Building [Member]
Property Subject to or Available for Operating Lease, Gross	$ 1,697,000	1,697,000
Property Subject to or Available for Operating Lease, Net	1,195,000	$ 1,253,000
Operating Leases, Future Minimum Payments Receivable	$ 12,000

Note 17 - Fair Value of Finan74

Note 17 - Fair Value of Financial Instruments - Securities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Marketable equity securities	$ 26,664	$ 27,621
Fair Value, Inputs, Level 1 [Member]
Marketable equity securities	26,664
Fair Value, Inputs, Level 2 [Member]
Marketable equity securities	0
Fair Value, Inputs, Level 3 [Member]
Marketable equity securities	$ 0

Note 17 - Fair Value of Finan75

Note 17 - Fair Value of Financial Instruments - Fair Value of Long-term Debt Other Than Lines of Credit (Details) - Equipment Financing [Member] - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Reported Value Measurement [Member]
Long-term debt	$ 172,636	$ 165,331
Estimate of Fair Value Measurement [Member]
Long-term debt	$ 171,289	$ 163,975

Note 18 - Related Party Trans76

Note 18 - Related Party Transactions (Details Textual) - Majority Shareholder [Member] - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Revenue from Related Parties	$ 585,000	$ 4,834,000	$ 11,325,000
Related Party Transaction, Expenses from Transactions with Related Party	7,497,000	8,837,000	4,834,000
Due from Related Parties	21,000	929,000
Due to Related Parties	971,000	1,297,000
Freight Transportation [Member]
Accounts Receivable, Related Parties	19,000	925,000
Maintenance Performed and Charges Paid to Third Parties on Behalf of Their Affiliate and Charged Back [Member]
Accounts Receivable, Related Parties	2,000	4,000
Insurance Premiums Paid in Excess of Amounts Earned [Member]
Accounts Receivable, Related Parties	1,385,000	472,000
Physical Damage Coverage [Member]
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party	1,808,000	2,091,000	2,467,000
Auto Liability Coverage [Member]
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party	10,860,000	11,030,000	9,605,000
General Liability Coverage [Member]
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party	35,000	21,000	23,000
Workers Compensation Coverage [Member]
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party	$ 286,000	$ 298,000	276,000
Trucks [Member]
Proceeds from Sale of Productive Assets			$ 67,500

Note 19 - Quarterly Results o77

Note 19 - Quarterly Results of Operations (Unaudited) - Quarterly Financial Information (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Operating revenues	$ 110,888	$ 108,899	$ 108,646	$ 109,405	$ 108,354	$ 109,393	$ 111,516	$ 103,589	$ 437,838	$ 432,852	$ 417,050
Operating expenses and costs	107,536	105,131	105,748	106,743	106,661	104,098	104,162	98,003	425,158	412,924	380,820
Operating income	3,352	3,768	2,898	2,662	1,693	5,295	7,354	5,586	12,680	19,928	36,230
Non-operating (loss) income	384	2,767	650	2,052	282	1,235	(10)	(22)	5,853	1,485	1,516
Interest expense	(1,070)	(920)	(935)	(977)	(982)	(927)	(910)	(822)	(3,902)	(3,641)	(2,818)
Total income tax (benefit) expense	28,895	(2,169)	(1,004)	(1,454)	(270)	(2,152)	(2,442)	(1,807)	(24,268)	6,671	13,492
Net income	$ 31,561	$ 3,446	$ 1,609	$ 2,283	$ 723	$ 3,451	$ 3,992	$ 2,935	$ 38,899	$ 11,101	$ 21,436
Basic (in dollars per share)	$ 5.07	$ 0.54	$ 0.25	$ 0.36	$ 0.11	$ 0.54	$ 0.61	$ 0.41	$ 6.14	$ 1.68	$ 2.94
Diluted (in dollars per share)	$ 5	$ 0.54	$ 0.25	$ 0.36	$ 0.11	$ 0.53	$ 0.61	$ 0.41	$ 6.08	$ 1.67	$ 2.93
Basic (in shares)	6,219	6,326	6,381	6,399	6,400	6,439	6,551	7,121	6,331	6,627	7,288
Diluted (in shares)	6,312	6,373	6,430	6,425	6,425	6,458	6,572	7,145	6,398	6,649	7,325