Pamt (PAMT) 10-K 12 Mar 19 2018 FY Annual report Financial data

Document And Entity Information

Document And Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2018	Feb. 22, 2019	Jun. 30, 2018
Document Information [Line Items]
Entity Registrant Name	PAM TRANSPORTATION SERVICES INC
Entity Central Index Key	0000798287
Trading Symbol	ptsi
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	No
Entity Emerging Growth Company	false
Entity Small Business	true
Entity Common Stock, Shares Outstanding (in shares)		5,916,910
Entity Public Float			$ 95,927,799
Document Type	10-K
Document Period End Date	Dec. 31, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Shell Company	false

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($)	Dec. 31, 2018	Dec. 31, 2017
CURRENT ASSETS:
Cash and cash equivalents	$ 282,000	$ 224,000
Trade, less allowance of $2,224 and $1,335, respectively	63,350,000	59,055,000
Other	3,814,000	3,028,000
Inventories	1,461,000	1,660,000
Prepaid expenses and deposits	10,393,000	10,112,000
Marketable equity securities	27,549,000	26,664,000
Income taxes refundable	1,876,000	1,499,000
Total current assets	108,725,000	102,242,000
PROPERTY AND EQUIPMENT:
Land	5,596,000	5,374,000
Structures and improvements	19,547,000	18,927,000
Revenue equipment	457,142,000	375,817,000
Office furniture and equipment	10,040,000	9,761,000
Total property and equipment	492,325,000	409,879,000
Accumulated depreciation	(137,738,000)	(122,935,000)
Net property and equipment	354,587,000	286,944,000
OTHER ASSETS	2,754,000	2,999,000
TOTAL ASSETS	466,066,000	392,185,000
CURRENT LIABILITIES:
Accounts payable	20,002,000	19,645,000
Accrued expenses and other liabilities	23,497,000	17,609,000
Current maturities of long-term debt	63,908,000	73,641,000
Total current liabilities	107,407,000	110,895,000
Long-term debt—less current portion	157,315,000	98,995,000
Deferred income taxes	61,897,000	54,691,000
Total liabilities	326,619,000	264,581,000
COMMITMENTS AND CONTINGENCIES (Note 17)
STOCKHOLDERS’ EQUITY
Preferred stock, $.01 par value, 10,000,000 shares authorized; none issued
Common stock, $.01 par value, 40,000,000 shares authorized; 11,612,144 and 11,529,124 shares issued; 5,956,558 and 6,160,889 shares outstanding at December 31, 2018 and 2017, respectively	116,000	115,000
Additional paid-in capital	82,776,000	81,559,000
Accumulated other comprehensive income		7,444,000
Treasury stock, at cost; 5,655,586 and 5,368,235 shares at December 31, 2018 and 2017, respectively	(142,552,000)	(129,183,000)
Retained earnings	199,107,000	167,669,000
Total stockholders’ equity	139,447,000	127,604,000
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 466,066,000	$ 392,185,000

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Trade, allowance	$ 2,224	$ 1,335	$ 994	$ 549
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)	11,612,144	11,529,124
Common stock, outstanding (in shares)	5,956,558	6,160,889
Treasury stock (in shares)	5,655,586	5,368,235

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
OPERATING REVENUES:
Operating revenues	$ 533,261	$ 437,838	$ 432,852
OPERATING EXPENSES AND COSTS:
Salaries, wages and benefits	119,819	102,227	112,235
Operating supplies and expenses	93,130	79,505	82,993
Rents and purchased transportation	201,455	174,477	158,298
Depreciation	49,387	42,274	39,114
Insurance and claims	17,191	17,484	16,632
Other	11,983	9,249	8,352
Gain on disposition of equipment	(1,306)	(58)	(4,700)
Total operating expenses and costs	491,659	425,158	412,924
OPERATING INCOME	41,602	12,680	19,928
NON-OPERATING (EXPENSE) INCOME	(4,016)	5,853	1,485
INTEREST EXPENSE	(6,245)	(3,902)	(3,641)
INCOME BEFORE INCOME TAXES	31,341	14,631	17,772
FEDERAL & STATE INCOME TAX EXPENSE (BENEFIT):
Current	141	362	13
Deferred	7,206	(24,630)	6,658
Total federal & state income tax expense (benefit)	7,347	(24,268)	6,671
NET INCOME	$ 23,994	$ 38,899	$ 11,101
EARNINGS PER COMMON SHARE:
Basic (in dollars per share)	$ 3.94	$ 6.14	$ 1.68
Diluted (in dollars per share)	$ 3.90	$ 6.08	$ 1.67
AVERAGE COMMON SHARES OUTSTANDING:
Basic (in shares)	6,083	6,331	6,627
Diluted (in shares)	6,159	6,398	6,649
Freight Transportation Service [Member]
OPERATING REVENUES:
Operating revenues	$ 445,855	$ 373,523	$ 382,737
Fuel Surcharge [Member]
OPERATING REVENUES:
Operating revenues	$ 87,406	$ 64,315	$ 50,115

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
NET INCOME		$ 23,994	$ 38,899	$ 11,101
Other comprehensive income (loss), net of tax:
Reclassification adjustment for realized gains on marketable securities included in net income (1)	[1]		(2,059)	(543)
Reclassification adjustment for unrealized losses on marketable securities included in net income (2)	[2]		26	440
Changes in fair value of marketable securities (3)	[3]		2,001	2,269
COMPREHENSIVE INCOME		$ 23,994	$ 38,867	$ 13,267
[1]	Net of deferred income taxes of $0, $(1,326), and $(333), respectively.
[2]	Net of deferred income taxes of $0, $16, and $269, respectively.
[3]	Net of deferred income taxes of $0, $(687), and $1,390, respectively.

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, 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 income, 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
Treasury stock repurchases (in shares)	733,000
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 income, 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
Treasury stock repurchases (in shares)	(254,000)
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
NET INCOME					23,994	$ 23,994
Exercise of stock options-shares issued including tax benefits (in shares)	45,000					45,005
Exercise of stock options-shares issued including tax benefits	$ 1	485				$ 486
Restricted stock issued (in shares)	38,000
Restricted stock issued
Treasury stock repurchases (in shares)	287,000
Treasury stock repurchases				(13,369)		(13,369)
Share-based compensation		732				732
Treasury stock repurchases (in shares)	(287,000)
Cumulative effect adjustment – ASU 2016-01			(7,444)		7,444	(7,444)
Balance (in shares) at Dec. 31, 2018	5,957,000
Balance at Dec. 31, 2018	$ 116	$ 82,776	$ 0	$ (142,552)	$ 199,107	$ 139,447

Consolidated Statements of St_2

Consolidated Statements of Stockholders' Equity (Parentheticals) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Other comprehensive (loss), tax	$ 1,995	$ 1,326

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
OPERATING ACTIVITIES:
Net income	$ 23,994,000	$ 38,899,000	$ 11,101,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	49,387,000	42,274,000	39,114,000
Bad debt expense	889,000	341,000	445,000
Stock compensation—net of excess tax benefits	732,000	614,000	302,000
Sale leaseback deferred gain amortization			(131,000)
Provision for (benefit from) deferred income taxes	7,206,000	(24,630,000)	6,658,000
Reclassification of other than temporary impairment in marketable equity securities		42,000	709,000
Recognized loss (gain) on marketable equity securities	5,388,000	(4,735,000)	(1,003,000)
Gain on sale or disposal of equipment	(1,306,000)	(58,000)	(4,700,000)
Changes in operating assets and liabilities:
Accounts receivable	(5,970,000)	(1,298,000)	(6,408,000)
Prepaid expenses, deposits, inventories, and other assets	(137,000)	(1,095,000)	(685,000)
Income taxes refundable	(76,000)	(155,000)	2,127,000
Trade accounts payable	1,731,000	682,000	3,231,000
Accrued expenses and other liabilities	509,000	(266,000)	(3,041,000)
Net cash provided by operating activities	82,347,000	50,614,000	47,719,000
INVESTING ACTIVITIES:
Purchases of property and equipment	(73,882,000)	(67,674,000)	(86,128,000)
Proceeds from disposition of equipment	24,904,000	18,766,000	32,256,000
Sales of marketable equity securities	1,045,000	6,833,000	1,550,000
Purchases of marketable equity securities, net of return of capital	(7,318,000)	(3,211,000)	(810,000)
Net cash used in investing activities	(55,251,000)	(45,286,000)	(53,132,000)
FINANCING ACTIVITIES:
Borrowings under line of credit	615,612,000	483,297,000	520,089,000
Repayments under line of credit	(605,419,000)	(485,163,000)	(528,200,000)
Borrowings of long-term debt	52,717,000	55,415,000	83,517,000
Repayments of long-term debt	(82,442,000)	(48,110,000)	(47,457,000)
Borrowings under margin account	7,584,000	3,412,000	1,078,000
Repayments under margin account	(2,206,000)	(7,867,000)	(2,669,000)
Repurchases of common stock	(13,369,000)	(6,348,000)	(21,056,000)
Proceeds from exercise of stock options	485,000	123,000	91,000
Net cash (used in) provided by financing activities	(27,038,000)	(5,241,000)	5,393,000
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	58,000	87,000	(20,000)
CASH, CASH EQUIVALENTS—Beginning of year	224,000	137,000	157,000
CASH, CASH EQUIVALENTS—End of year	282,000	224,000	137,000
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION—
Interest	6,095,000	3,905,000	3,597,000
Income taxes	217,000	518,000	286,000
NONCASH INVESTING AND FINANCING ACTIVITIES—
Purchases of revenue equipment included in accounts payable	$ 1,597,000	$ 2,973,000	$ 97,000

Note 1 - Accounting Policies

Note 1 - Accounting Policies	12 Months Ended
	Dec. 31, 2018
Notes to Financial Statements
Significant Accounting Policies [Text Block]	1. ACCOUNTING POLICIES Description of Business and Principles of Consolidation 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 Cash and Cash Equivalents three may Accounts Receivable and Allowance for Doubtful Accounts not may Bank Overdrafts not not zero not December 31, 2018 2017 $3,669,000 $4,377,000, Accounts Receivable Other December 31, 2018 2017, $220,000 $448,000, December 31, 2018 2017, $1,724,000 $1,813,000, Marketable Equity Securities 321, 321” 321 Prior to the adoption of ASU 2016 01 January 1, 2018, For additional information with respect to marketable equity securities, “Item 8. 4 Impairment of Long-Lived Assets may not not not No 2018 2017. Property and Equipment Asset Class Estimated Asset Life (in years) Service vehicles 3 - 5 Office furniture and equipment 3 - 7 Revenue equipment 3 - 8 Structures 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 2018 2017, not 2016, $1.0 $2.7 $1.3 2018, 2017 2016, Inventory first first Prepaid Tires 24 Advertising Expense $1,234,000, $1,087,000 $1,019,000 December 31, 2018, 2017 2016, Repairs and Maintenance Self - Insurance Liability not Income Taxes not not The application of income tax law to multi-jurisdictional operations such as those performed by the Company, is 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, 2018 2017, not Revenue Recognition no S hare- Based Compensation 8. 14 Earnings Per Share 8. 15 Fair Value Measurements 8. 19 Reporting Segment s 80.0%, 86.3% 88.4% twelve December 31, 2018, 2017 2016, Concentrations of Credit Risk not Subsequent Events January 24, 2019, March 28, 2016 ( $40.0 The purposes of the Amendment are to extend the term of the Loan by one July 1, 2021, $40.0 $60.0 1.50% 1.25%, 0.25% $18.0 Under the terms of the Agreement, as amended by the Amendment, the Company may $60.0 first 1.25%. July 1, 2021. not Foreign Currency Transactions Recent Accounting Pronouncements– July 2018, No. 2018 09, 2018 09” 2018 09 2018 09 December 15, 2018, not In July 2018, No. 2018 10, 2018 10” Codification Improvements to Topic 842, 2018 10 842, 2018 10 December 15, 2018, not In May 2017, No. 2017 09, 2017 09” Compensation – Stock Compensation (Topic 718 718. 2017 09 December 15, 2017 2017 09 January 1, 2018 not In November 2016, No. 2016 18, 2016 18” Statement of Cash Flows (Topic 230 2016 18 No. 2016 18 December 15, 2017, January 1, 2018 not In August 2016, No. 2016 15, 2016 15” Statement of Cash Flows (Topic 230 2016 15 230, eight December 15, 2017, January 1, 2018 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, 2016, January 1, 2017, not In February 2016, No. 2016 02, 2016 02” Leases (Topic 842 12 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, The Company has evaluated the leases in which it participates as lessee and determined them to be operating leases, the majority of which have lease terms of one not In January 2016, No. 2016 01, 2016 01” Financial Instruments - Overall (Subtopic 825 10 The provisions of ASU 2016 01 • Categorize securities as equity securities or debt securities; • Eliminate the classification of equity securities as trading or available for sale; • Determine which securities have readily determinable fair values; • Use the exit price notion 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; and • Recognize changes in the fair market value of equity securities in net income. ASU 2016 01 December 15, 2017. not January 1, 2018, not $7.4 December 31, 2017 In May 2014, No. 2014 09, 2014 09” Revenue from Contracts with Customers 2014 09 2014 09 1 2 3 4 5 2014 09 The adoption of this guidance on January 1, 2018 not 8. 2

Note 2 - Revenue Recognition

Note 2 - Revenue Recognition	12 Months Ended
	Dec. 31, 2018
Notes to Financial Statements
Revenue from Contract with Customer [Text Block]	2. REVENUE RECOGNITION On January 1, 2018, 2014 09 not five no January 1, 2018 2014 09 not December 31, 2018. The Company has a single performance obligation, to transport our customer’s freight from a specified origin to a specified destination. The Company has the discretion to choose to self-transport or to arrange for alternate transportation to fulfill the performance obligation. Where the Company decides to self-transport the freight, the Company classifies the service as truckload services, and where the Company arranges for alternate transportation of the freight, the Company classifies the service as brokerage and logistics services. In either case, the Company is paid a rate to transport freight from its origin location to a specified destination. Because the primary factors influencing revenue recognition, including performance obligation, customer base, and timing of revenue recognition, are the same for both of its service categories, the Company utilizes the same revenue recognition method throughout its operations. Company revenue is generated from freight transportation services performed utilizing heavy tractor trailer combinations. While various ownership arrangements may third not In fulfilling the Company’s obligation to transport freight from a specified origin to a specified destination, control of freight is transferred to us at the point it has been loaded into the driver’s trailer, the doors are sealed and the driver has signed a bill of lading, which is the basic transportation agreement that establishes the nature, quantity and condition of the freight loaded, responsibility for invoice payment, and pickup and delivery locations. Our revenue is generated, and our customer receives benefit, as the freight progresses towards delivery locations. In the event our customer cancels the shipment at some point prior to the final delivery location and re-consigns the shipment to an alternate delivery location, we are entitled to receive payment for services performed for the partial shipment. Shipments are generally conducted over a relatively short time span, generally one three one Freight Revenue – revenue generated by the performance of the freight transportation service, including any accessorial service, provided to customers. Fuel Surcharge Revenue – revenue designed to adjust freight revenue rates to an agreed upon base cost for diesel fuel. Diesel fuel prices can fluctuate widely during the term of a contract with a customer. At the point that freight revenue rates are negotiated with customers, a sliding scale is agreed upon that approximately adjusts diesel fuel costs to an agreed upon base amount. In general, as fuel prices increase, revenue from fuel surcharge increases, so that diesel fuel cost is adjusted to the approximate base amount agreed upon. Revenue is recognized over time as the freight progresses towards its destination and the transportation service obligation is fulfilled. For loads picked up during the reporting period, but delivered in a subsequent reporting period, revenue is allocated to each period based on the transit time in each period as a percentage of total transit time. There are no

Note 3 - Trade Accounts Receiva

Note 3 - Trade Accounts Receivable	12 Months Ended
	Dec. 31, 2018
Notes to Financial Statements
Financing Receivables [Text Block]	3. 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, 2018 2017: 20 1 8 20 1 7 ( i n thousands) Billed $ 56,766 $ 51,236 Unbilled 8,808 9,154 Allowance for doubtful accounts (2,224 ) (1,335 ) Total accounts receivable—net $ 63,350 $ 59,055 An analysis of changes in the allowance for doubtful accounts for the years ended December 31, 2018, 2017, 2016 20 1 8 20 1 7 20 1 6 ( i n thousands) Balance—beginning of year $ 1,335 $ 994 $ 549 Provision for bad debts 889 341 445 Charge-offs - - - Recoveries - - - Balance—end of year $ 2,224 $ 1,335 $ 994

Note 4 - Marketable Equity Secu

Note 4 - Marketable Equity Securities	12 Months Ended
	Dec. 31, 2018
Notes to Financial Statements
Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]	4. MARKETABLE EQUITY SECURITIES The Company accounts for its marketable securities in accordance with ASC Topic 321, Investments- Equity Securities 321 Marketable equity securities are carried at fair value, with gains and losses in fair market value included in the determination of net income. The fair market value of marketable equity securities is determined based on quoted market prices in active markets. See “Item 8. 19 The following table sets forth cost, market value and unrealized gain on equity securities classified as available-for-sale as of December 31, 2018 2017. 2018 2017 (in thousands) Available-for-sale securities: Fair market value $ 27,549 $ 26,664 Cost 25,602 16,640 Unrealized gain $ 1,947 $ 10,024 Prior to the Company’s January 1, 2018 2016 01, 2016 01, no December 31, 2017 $2,314,000 The following table sets forth the gross unrealized gains and losses on the Company’s marketable securities as of December 31, 2018 2017. 2018 2017 (in thousands) Available-for-sale securities: Gross unrealized gains $ 5,668 $ 10,150 Gross unrealized losses 3,721 126 Net unrealized gains $ 1,947 $ 10,024 For the years ended December 31, 2018, 2017 2016, $1,171,000, $999,000, $1,024,000 The following table shows the Company’s net realized gains during 2018, 2017 2016 2018 2017 2016 (in thousands) Realized gains: Sale proceeds $ 1,044 $ 6,833 $ 1,550 Cost of securities sold 669 2,098 547 Realized gains $ 375 $ 4,735 $ 1,003 Realized gains, net of taxes $ 278 $ 2,938 $ 627 At December 31, 2018, $12,399,000 $3,721,000, December 31, 2017, $2,980,000 $126,000, The market value of the Company’s equity securities are periodically used as collateral against any outstanding margin account borrowings. As of December 31, 2018 2017, $11,281,000 $5,903,000 3.11% 2.07% December 31, 2018 2017,

Note 5 - Accrued Expenses and O

Note 5 - Accrued Expenses and Other Liabilities	12 Months Ended
	Dec. 31, 2018
Notes to Financial Statements
Accounts Payable and Accrued Liabilities Disclosure [Text Block]	5. ACCRUED EXPENSES AND OTHER LIABILITIES Accrued expenses and other liabilities at December 31 20 1 8 20 1 7 ( i n thousands) Payroll $ 2,955 $ 2,710 Accrued vacation 1,987 1,762 Taxes—other than income 2,319 2,488 Interest 249 99 Driver escrows 2,722 2,381 Margin account borrowings 11,281 5,903 Self-insurance claims 1,984 2,266 Total accrued expenses and other liabilities $ 23,497 $ 17,609

Note 6 - Claims Liabilities

Note 6 - Claims Liabilities	12 Months Ended
	Dec. 31, 2018
Notes to Financial Statements
Liability for Future Policy Benefits and Unpaid Claims Disclosure [Text Block]	6. CLAIMS LIABILITIES With respect to 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 $10,000 $2,500, September 1, 2018, October 1, 2013, October 1, 2013 September 30, 2015, $2,500 October 1, 2015, The Company maintains workers’ compensation coverage in Arkansas, Ohio, Oklahoma, Mississippi, and Florida with a $500,000 $500,000 not not $515,000 $300,000 $325,000 not 8. 5

Note 7 - Long-term Debt

Note 7 - Long-term Debt	12 Months Ended
	Dec. 31, 2018
Notes to Financial Statements
Long-term Debt [Text Block]	7. LONG-TERM DEBT Long-term debt at December 31, 201 8 201 7 (in thousands) Line of credit with a bank—due July 1, 2020, and collateralized by accounts receivable (1) 10,192 - Equipment financing (2) 211,031 172,636 Total long-term debt 221,223 172,636 Less current maturities (63,908 ) (73,641 ) Long-term debt—net of current maturities $ 157,315 $ 98,995 ( 1 Line of credit agreement with a bank provides for maximum borrowings of $40.0 first 1.50% 3.85% December 31, 2018 4.00:1. 2018. December 31, 2018, $10.9 $0.7 $29.1 ( 2 Equipment financings consist of installment obligations for revenue equipment purchases, payable in various monthly installments with various maturity dates through October 2025, 3.61% December 31, 2018 The Company has provided letters of credit to third $700,000 December 31, 2018. third Scheduled annual maturities on long-term debt outstanding at December 31, 2018, 2019 $ 63,908 2020 67,636 2021 28,505 2022 18,558 2023 37,656 2024 3,013 2025 1,947 Total $ 221,223

Note 8 - Noncash Investing and

Note 8 - Noncash Investing and Financing Activities	12 Months Ended
	Dec. 31, 2018
Notes to Financial Statements
Cash Flow, Supplemental Disclosures [Text Block]	8. NONCASH INVESTING AND FINANCING ACTIVITIES The Company financed approximately $68.1 2018

Note 9 - Capital Stock

Note 9 - Capital Stock	12 Months Ended
	Dec. 31, 2018
Notes to Financial Statements
Stockholders' Equity Note Disclosure [Text Block]	9. CAPITAL STOCK The Company's authorized capital stock consists of 40,000,000 $.01 10,000,000 $.01 December 31, 2018, 11,612,144 5,956,558 December 31, 2017, 11,529,124 6,160,889 No December 31, 2018 2017. Common Stock The holders of our common stock, subject to such rights as may one no Preferred Stock Preferred stock may may December 31, 2018, no Treasury Stock In May 2018, 100,000 “2018 2% 124,248 2018 May 8, 2018 June 7, 2018. $39.00 $43.00 185,597 $40.00 $7.5 June 12, 2018. December 31, 2018. In October 2017, 400,000 “2017 2% 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. The Company’s stock repurchase program has been extended and expanded several times, most recently in April 2017, 500,000 September 2011 101,754 110,316 2018 2017, The Company accounts for Treasury stock using the cost method, and as of December 31, 2018, 5,655,586 $142,552,000.

Note 10 - Comprehensive Income

Note 10 - Comprehensive Income (Loss)	12 Months Ended
	Dec. 31, 2018
Notes to Financial Statements
Comprehensive Income (Loss) Note [Text Block]	10. COMPREHENSIVE INCOME (LOSS) Prior to the Company’s January 1, 2018 2016 01, In accordance with the adoption of ASU 2016 01 January 1, 2018, December 31, 2017 The following table summarizes the changes in accumulated balances of other comprehensive income for the years ended December 31, 2018 2017: Unrealized gains and losses on available-for-sale securities (in thousands) Balance at January 1, 2017, 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, 2017, net of tax of $2,579 7,444 Cumulative effect adjustment – ASU 2016-01 (7,444 ) Net other comprehensive income (loss) (7,444 ) Balance at December 31, 2018 $ - The following table provides details about reclassifications out of accumulated other comprehensive income for the year ended December 31, 2018 2017: Details about Accumulated Other Amounts Reclassified from Accumulated Other Comprehensive Income Statement of Operations Comprehensive Income Component 2018 2017 Classification (in thousands) Unrealized gains and losses on available-for-sale securities: Unrealized gains and losses on securities sold $ - $ 3,385 Non-operating income Impairment expense - (42 ) Non-operating income Total before tax - 3,343 Income before income taxes Tax expense - (1,310 ) Income tax expense Total after tax $ - $ 2,033 Net income

Note 11 - Segment Information,

Note 11 - Segment Information, Significant Customers, Industry Concentration and Geographic Areas	12 Months Ended
	Dec. 31, 2018
Notes to Financial Statements
Segment Reporting and Concentration Risk Disclosure [Text Block]	11. SEGMENT INFORMATION, SIGNIFICANT CUSTOMERS, INDUSTRY CONCENTRATION AND GEOGRAPHIC AREAS The Company's revenues for 2018, 2017 2016 The table below presents revenue dollars and percentages by geographic area: Year ended December 31, 2018 2017 2016 (in thousands) Amount Percent Amount Percent Amount Percent United States - domestic shipments $ 302,754 56.8 $ 255,197 58.3 $ 251,390 58.1 Shipments to or from Mexico 229,350 43.0 181,099 41.4 181,159 41.9 Shipments to or from Canada 1,157 0.2 1,542 0.3 303 - Total Operating Revenues $ 533,261 100 % 437,838 100 % $ 432,852 100 % Our five 42%, 41% 43% 2018, 2017 2016, 16%, 10% 9% 2018, 2017 2016, 13%, 18% 18% 2018, 2017 2016, 8%, 9% 10% 2018, 2017 2016, We also provide transportation services to other manufacturers who are suppliers for automobile manufacturers. Approximately 46%, 46% 45% 2018, 2017 2016, Accounts receivable from the three $30,848,000 $29,788,000 December 31, 2018 2017,

Note 12 - Dividends

Note 12 - Dividends	12 Months Ended
	Dec. 31, 2018
Notes to Financial Statements
Dividend Payment Restrictions [Text Block]	12. DIVIDENDS The Company has paid cash dividends in the past; however, the Company currently intends to retain future earnings and does not

Note 13 - Federal and State Inc

Note 13 - Federal and State Income Taxes	12 Months Ended
	Dec. 31, 2018
Notes to Financial Statements
Income Tax Disclosure [Text Block]	13. 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 8 201 7 (in thousands) Deferred tax liabilities: Property and equipment $ 78,502 $ 60,388 Unrealized gains on securities 2,580 2,580 Prepaid expenses and other 2,667 2,603 Total deferred tax liabilities 83,749 65,571 Deferred tax assets: Allowance for doubtful accounts 572 344 QAFMV tax credit carryforward 864 864 New hire tax credit 124 124 Compensated absences 460 410 Self-insurance allowances 188 149 Share-based compensation - 61 Marketable equity securities 2,200 750 Net operating loss carryover 17,241 7,975 Other 203 203 Total deferred tax assets 21,852 10,880 Net deferred tax liability $ 61,897 $ 54,691 The reconciliation between the effective income tax rate and the statutory Federal income tax rate for the years ended December 31, 2018, 2017 2016 201 8 201 7 201 6 (in thousands) Amount Percent Amount Percent Amount Percent Income tax at the statutory federal rate $ 6,582 21.0 $ 4,975 34.0 $ 6,042 34.0 Impact of the Tax Cuts and Jobs Act (1) - - (29,255 ) (199.9 ) - - Nondeductible expenses 80 0.2 72 0.5 130 0.7 State income taxes/other—net of federal benefit 685 2.2 (60 ) (0.5 ) 499 2.8 Total income tax (benefit) expense $ 7,347 23.4 $ (24,268 ) (165.9 ) $ 6,671 37.5 ( 1 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 8 201 7 201 6 (in thousands) Current: Federal $ (48 ) $ (79 ) $ (225 ) State 189 441 238 Total current income tax provision 141 362 13 Deferred: Federal 6,185 (24,622 ) 5,506 State 1,021 (8 ) 1,152 Total deferred income tax (benefit) provision 7,206 (24,630 ) 6,658 Total income tax (benefit) expense $ 7,347 $ (24,268 ) $ 6,671 At December 31, 2018, $1,214,000 50% $988,000 December 31, 2018, 2030. $66,983,000 2030. In determining whether a tax asset valuation allowance is necessary, management, in accordance with the provisions of ASC 740 10 30, December 31, 2018 2017, not The Company recognizes a tax benefit from an uncertain tax position only if it is more likely than not December 31, 2018, not 2018 2017, 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 2015 Prior to 2018, third not December 31, 2017, $29,000 third

Note 14 - Stock-based Compensat

Note 14 - Stock-based Compensation	12 Months Ended
	Dec. 31, 2018
Notes to Financial Statements
Compensation and Employee Benefit Plans [Text Block]	14. STOCK-BASED COMPENSATION The Company maintains a stock incentive plan under which incentive and nonqualified stock options and other stock awards may March 13, 2014, May 29, 2014 2014 2006 750,000 2014 not 85% In December 2018, 33,000 $36.35 one fourth four In March 2018, 1,932 $36.35 In April 2017, 100,000 $16.38, one third three In March 2017, 4,298 $16.29 In March 2016, 2,275 $30.80 March 2016, 5,000 $30.81, 25% 25% three During 2018 2017, no no December 31, 2018. December 31, 2018, 405,000 The grant date fair value of stock and stock options vested during 2018, 2017 2016 $719,000, $256,000 $273,000, $732,000 2018 $70,000 276 first 2018. $172,000 2018. $0.09 $0.10, 2018. December 31, 2018, $1,864,000 $846,000 2019, $430,000 2020, $294,000 2021, $294,000 2022. Total pre-tax stock-based compensation expense, recognized in Salaries, wages and benefits was approximately $614,000 2017 $70,000 614 first 2017. $231,000 2017. $0.26 2017. 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. Transactions in stock options under these plans are summarized as follows: Shares Under Option Weighted- Average Exercise Price Outstanding—January 1, 2016: 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 Granted - - Exercised (45,005 ) 10.79 Canceled (63 ) 10.90 Outstanding—December 31, 2018: - $ - Options exercisable—December 31, 2018: - $ - There were no 2018, 2017, 2016. no 2017. 2018 2016 $6.34 $6.07, The total intrinsic value of options exercised during the years ended December 31, 2018, 2017 2016, $1,406,000, $82,000 $101,000, A summary of the status of the Company’s non-vested restricted stock as of December 31, 2018 December 31, 2018, Restricted Stock Number of Shares Weighted- Average Grant Date Fair Value Nonvested at January 1, 2018 104,150 $ 17.14 Granted 34,932 36.35 Canceled/forfeited/expired (150 ) 42.65 Vested (38,015 ) 18.91 Nonvested at December 31, 2018 100,917 $ 23.09 Cash received from option exercises totaled approximately $485,000, $123,000 $91,000 December 31, 2018, 2017 2016,

Note 15 - Earnings Per Share

Note 15 - Earnings Per Share	12 Months Ended
	Dec. 31, 2018
Notes to Financial Statements
Earnings Per Share [Text Block]	15. 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 8 201 7 201 6 (in thousands, except per share data) Net income $ 23,994 $ 38,899 $ 11,101 Basic weighted average common shares outstanding 6,083 6,331 6,627 Dilutive effect of common stock equivalents 76 67 22 Diluted weighted average common shares outstanding 6,159 6,398 6,649 Basic earnings per share $ 3.94 $ 6.14 $ 1.68 Diluted earnings per share $ 3.90 $ 6.08 $ 1.67

Note 16 - Benefit Plan

Note 16 - Benefit Plan	12 Months Ended
	Dec. 31, 2018
Notes to Financial Statements
Pension and Other Postretirement Benefits Disclosure [Text Block]	16. BENEFIT PLAN The Company sponsors a benefit plan for the benefit of all eligible employees. The plan qualifies under Section 401 50% 3% 20% five $176,000, $179,000 $161,000 2018, 2017 2016,

Note 17 - Commitments and Conti

Note 17 - Commitments and Contingencies	12 Months Ended
	Dec. 31, 2018
Notes to Financial Statements
Commitments and Contingencies Disclosure [Text Block]	17. COMMITMENTS AND CONTINGENCIES Other than the lawsuit discussed below, the Company is not We are a defendant in a collective-action lawsuit which was re-filed on December 9, 2016, December 6, 2013, may not During 2014 2015, 471 not 56 January 31, 2018. Total rental expense, net of amounts reimbursed, for the years ended December 31, 2018, 2017 2016 $47,000, $5,460,000, $10,294,000,

Note 18 - Lease Income

Note 18 - Lease Income	12 Months Ended
	Dec. 31, 2018
Notes to Financial Statements
Lessor, Operating Leases [Text Block]	18. 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 60 December 31, 2018 $61,061,000 $34,299,000, December 31, 2017 $42,206,000 $17,028,000, Leases in our lease-purchase program expire at various dates through 2023. December 31, 2018 2017 $22,319,000 $9,360,000, The Company leases office and shop facilities to a related party. At December 31, 2018, $1,697,000 $1,138,000, December 31, 2017, $1,697,000 $1,195,000, December 31, 2018 $12,000. 8. 20

Note 19 - Fair Value of Financi

Note 19 - Fair Value of Financial Instruments	12 Months Ended
	Dec. 31, 2018
Notes to Financial Statements
Fair Value Disclosures [Text Block]	19. FAIR VALUE OF FINANCIAL INSTRUMENTS The Company’s financial instruments consist of cash and cash equivalents, marketable equity securities, accounts receivable, trade accounts payable, and borrowings. The Company follows the guidance for financial assets and liabilities measured on a recurring basis. The guidance defines fair value 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 and also establishes a fair value hierarchy which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The standard describes 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, 2018 2017, 2018 2017 Total Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Marketable equity securities $ 27,549 $ 27,549 - - $ 26,664 $ 26,664 - - During 2018 2017, 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, 2018 2017 201 8 201 7 Carrying Value Estimated Fair Value Carrying Value Estimated Fair Value (in thousands) Long-term debt $ 211,031 $ 210,234 $ 172,636 $ 171,289 The Company has not

Note 20 - Related Party Transac

Note 20 - Related Party Transactions	12 Months Ended
	Dec. 31, 2018
Notes to Financial Statements
Related Party Transactions Disclosure [Text Block]	20. 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 $2,854,000, $585,000 $4,834,000 $9,859,000 $7,497,000 $8,837,000 2018, 2017, 2016, 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. The premiums for physical damage coverage were approximately $1,271,000, $1,808,000 $2,091,000 2018, 2017, 2016, 2018, 2017, 2016 $10,987,000, $10,860,000, $11,030,000, 2018, 2017, 2016 $24,000, $35,000 $21,000, 2018, 2017, 2016 $301,000, $286,000 $298,000, Amounts owed to the Company by these affiliates were approximately $149,000 $21,000 December 31, 2018 2017, December 31, 2018 2017, $147,000 $19,000 $2,000 $2,000 third December 31, 2018 2017 $29,000 $1,385,000, December 31, 2018 2017 $2,161,000 $971,000

Note 21 - Quarterly Results of

Note 21 - Quarterly Results of Operations (Unaudited)	12 Months Ended
	Dec. 31, 2018
Notes to Financial Statements
Quarterly Financial Information [Text Block]	21. QUARTERLY RESULTS OF OPERATIONS (UNAUDITED) The tables below present quarterly financial information for 2018 2017: 201 8 Three Months Ended March 31 June 30 September 30 December 31 (in thousands, except per share data) Operating revenues $ 119,458 $ 135,302 $ 140,325 $ 138,176 Operating expenses and costs 115,702 125,285 127,172 123,500 Operating income 3,756 10,017 13,153 14,676 Non-operating (loss) income (879 ) 632 935 (4,704 ) Interest expense (1,160 ) (1,355 ) (1,711 ) (2,019 ) Income tax (expense) benefit (330 ) (2,005 ) (3,129 ) (1,883 ) Net income $ 1,387 $ 7,289 $ 9,248 $ 6,070 Net income per common share: Basic $ 0.22 $ 1.18 $ 1.53 $ 1.02 Diluted $ 0.22 $ 1.17 $ 1.52 $ 1.01 Average common shares outstanding: Basic 6,168 6,159 6,034 5,975 Diluted 6,264 6,229 6,088 6,029 201 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 income 2,052 650 2,767 384 Interest expense (977 ) (935 ) (920 ) (1,070 ) Income tax 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

Significant Accounting Policies

Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Consolidation, Policy [Policy Text Block]	Description of Business and Principles of Consolidation 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
Cash and Cash Equivalents, Policy [Policy Text Block]	Cash and Cash Equivalents three may
Receivables, Policy [Policy Text Block]	Accounts Receivable and Allowance for Doubtful Accounts not may
Bank Overdrafts [Policy Text Block]	Bank Overdrafts not not zero not December 31, 2018 2017 $3,669,000 $4,377,000,
Trade and Other Accounts Receivable, Policy [Policy Text Block]	Accounts Receivable Other December 31, 2018 2017, $220,000 $448,000, December 31, 2018 2017, $1,724,000 $1,813,000,
Marketable Securities, Policy [Policy Text Block]	Marketable Equity Securities 321, 321” 321 Prior to the adoption of ASU 2016 01 January 1, 2018, For additional information with respect to marketable equity securities, “Item 8. 4
Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block]	Impairment of Long-Lived Assets may not not not No 2018 2017.
Property, Plant and Equipment, Policy [Policy Text Block]	Property and Equipment Asset Class Estimated Asset Life (in years) Service vehicles 3 - 5 Office furniture and equipment 3 - 7 Revenue equipment 3 - 8 Structures 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 2018 2017, not 2016, $1.0 $2.7 $1.3 2018, 2017 2016,
Inventory Supplies, Policy [Policy Text Block]	Inventory first first
Prepaid Tires [Policy Text Block]	Prepaid Tires 24
Advertising Costs, Policy [Policy Text Block]	Advertising Expense $1,234,000, $1,087,000 $1,019,000 December 31, 2018, 2017 2016,
Maintenance Cost, Policy [Policy Text Block]	Repairs and Maintenance
Self Insurance Liability [Policy Text Block]	Self - Insurance Liability not
Income Tax, Policy [Policy Text Block]	Income Taxes not not The application of income tax law to multi-jurisdictional operations such as those performed by the Company, is 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, 2018 2017, not
Revenue Recognition, Policy [Policy Text Block]	Revenue Recognition no
Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block]	S hare- Based Compensation 8. 14
Earnings Per Share, Policy [Policy Text Block]	Earnings Per Share 8. 15
Fair Value Measurement, Policy [Policy Text Block]	Fair Value Measurements 8. 19
Segment Reporting, Policy [Policy Text Block]	Reporting Segment s 80.0%, 86.3% 88.4% twelve December 31, 2018, 2017 2016,
Concentration Risk, Credit Risk, Policy [Policy Text Block]	Concentrations of Credit Risk not
Subsequent Events, Policy [Policy Text Block]	Subsequent Events January 24, 2019, March 28, 2016 ( $40.0 The purposes of the Amendment are to extend the term of the Loan by one July 1, 2021, $40.0 $60.0 1.50% 1.25%, 0.25% $18.0 Under the terms of the Agreement, as amended by the Amendment, the Company may $60.0 first 1.25%. July 1, 2021. not
Foreign Currency Transactions and Translations Policy [Policy Text Block]	Foreign Currency Transactions
New Accounting Pronouncements, Policy [Policy Text Block]	Recent Accounting Pronouncements– July 2018, No. 2018 09, 2018 09” 2018 09 2018 09 December 15, 2018, not In July 2018, No. 2018 10, 2018 10” Codification Improvements to Topic 842, 2018 10 842, 2018 10 December 15, 2018, not In May 2017, No. 2017 09, 2017 09” Compensation – Stock Compensation (Topic 718 718. 2017 09 December 15, 2017 2017 09 January 1, 2018 not In November 2016, No. 2016 18, 2016 18” Statement of Cash Flows (Topic 230 2016 18 No. 2016 18 December 15, 2017, January 1, 2018 not In August 2016, No. 2016 15, 2016 15” Statement of Cash Flows (Topic 230 2016 15 230, eight December 15, 2017, January 1, 2018 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, 2016, January 1, 2017, not In February 2016, No. 2016 02, 2016 02” Leases (Topic 842 12 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, The Company has evaluated the leases in which it participates as lessee and determined them to be operating leases, the majority of which have lease terms of one not In January 2016, No. 2016 01, 2016 01” Financial Instruments - Overall (Subtopic 825 10 The provisions of ASU 2016 01 • Categorize securities as equity securities or debt securities; • Eliminate the classification of equity securities as trading or available for sale; • Determine which securities have readily determinable fair values; • Use the exit price notion 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; and • Recognize changes in the fair market value of equity securities in net income. ASU 2016 01 December 15, 2017. not January 1, 2018, not $7.4 December 31, 2017 In May 2014, No. 2014 09, 2014 09” Revenue from Contracts with Customers 2014 09 2014 09 1 2 3 4 5 2014 09 The adoption of this guidance on January 1, 2018 not 8. 2

Note 1 - Accounting Policies (T

Note 1 - Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2018
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 - 8 Structures and improvements 5 - 40

Note 3 - Trade Accounts Recei_2

Note 3 - Trade Accounts Receivable (Tables)	12 Months Ended
	Dec. 31, 2018
Notes Tables
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]	20 1 8 20 1 7 ( i n thousands) Billed $ 56,766 $ 51,236 Unbilled 8,808 9,154 Allowance for doubtful accounts (2,224 ) (1,335 ) Total accounts receivable—net $ 63,350 $ 59,055
Schedule of Credit Losses Related to Financing Receivables, Current and Noncurrent [Table Text Block]	20 1 8 20 1 7 20 1 6 ( i n thousands) Balance—beginning of year $ 1,335 $ 994 $ 549 Provision for bad debts 889 341 445 Charge-offs - - - Recoveries - - - Balance—end of year $ 2,224 $ 1,335 $ 994

Note 4 - Marketable Equity Se_2

Note 4 - Marketable Equity Securities (Tables)	12 Months Ended
	Dec. 31, 2018
Notes Tables
Marketable Securities [Table Text Block]	2018 2017 (in thousands) Available-for-sale securities: Fair market value $ 27,549 $ 26,664 Cost 25,602 16,640 Unrealized gain $ 1,947 $ 10,024
Unrealized Gain (Loss) on Investments [Table Text Block]	2018 2017 (in thousands) Available-for-sale securities: Gross unrealized gains $ 5,668 $ 10,150 Gross unrealized losses 3,721 126 Net unrealized gains $ 1,947 $ 10,024
Schedule of Realized Gain (Loss) [Table Text Block]	2018 2017 2016 (in thousands) Realized gains: Sale proceeds $ 1,044 $ 6,833 $ 1,550 Cost of securities sold 669 2,098 547 Realized gains $ 375 $ 4,735 $ 1,003 Realized gains, net of taxes $ 278 $ 2,938 $ 627

Note 5 - Accrued Expenses and_2

Note 5 - Accrued Expenses and Other Liabilities (Tables)	12 Months Ended
	Dec. 31, 2018
Notes Tables
Schedule of Accrued Liabilities [Table Text Block]	20 1 8 20 1 7 ( i n thousands) Payroll $ 2,955 $ 2,710 Accrued vacation 1,987 1,762 Taxes—other than income 2,319 2,488 Interest 249 99 Driver escrows 2,722 2,381 Margin account borrowings 11,281 5,903 Self-insurance claims 1,984 2,266 Total accrued expenses and other liabilities $ 23,497 $ 17,609

Note 7 - Long-term Debt (Tables

Note 7 - Long-term Debt (Tables)	12 Months Ended
	Dec. 31, 2018
Notes Tables
Schedule of Long-term Debt Instruments [Table Text Block]	201 8 201 7 (in thousands) Line of credit with a bank—due July 1, 2020, and collateralized by accounts receivable (1) 10,192 - Equipment financing (2) 211,031 172,636 Total long-term debt 221,223 172,636 Less current maturities (63,908 ) (73,641 ) Long-term debt—net of current maturities $ 157,315 $ 98,995
Schedule of Maturities of Long-term Debt [Table Text Block]	2019 $ 63,908 2020 67,636 2021 28,505 2022 18,558 2023 37,656 2024 3,013 2025 1,947 Total $ 221,223

Note 10 - Comprehensive Incom_2

Note 10 - Comprehensive Income (Loss) (Tables)	12 Months Ended
	Dec. 31, 2018
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, 2017, 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, 2017, net of tax of $2,579 7,444 Cumulative effect adjustment – ASU 2016-01 (7,444 ) Net other comprehensive income (loss) (7,444 ) Balance at December 31, 2018 $ -
Reclassification out of Accumulated Other Comprehensive Income [Table Text Block]	Details about Accumulated Other Amounts Reclassified from Accumulated Other Comprehensive Income Statement of Operations Comprehensive Income Component 2018 2017 Classification (in thousands) Unrealized gains and losses on available-for-sale securities: Unrealized gains and losses on securities sold $ - $ 3,385 Non-operating income Impairment expense - (42 ) Non-operating income Total before tax - 3,343 Income before income taxes Tax expense - (1,310 ) Income tax expense Total after tax $ - $ 2,033 Net income

Note 11 - Segment Information_2

Note 11 - Segment Information, Significant Customers, Industry Concentration and Geographic Areas (Tables)	12 Months Ended
	Dec. 31, 2018
Notes Tables
Reconciliation of Revenue from Segments to Consolidated [Table Text Block]	Year ended December 31, 2018 2017 2016 (in thousands) Amount Percent Amount Percent Amount Percent United States - domestic shipments $ 302,754 56.8 $ 255,197 58.3 $ 251,390 58.1 Shipments to or from Mexico 229,350 43.0 181,099 41.4 181,159 41.9 Shipments to or from Canada 1,157 0.2 1,542 0.3 303 - Total Operating Revenues $ 533,261 100 % 437,838 100 % $ 432,852 100 %

Note 13 - Federal and State I_2

Note 13 - Federal and State Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2018
Notes Tables
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]	201 8 201 7 (in thousands) Deferred tax liabilities: Property and equipment $ 78,502 $ 60,388 Unrealized gains on securities 2,580 2,580 Prepaid expenses and other 2,667 2,603 Total deferred tax liabilities 83,749 65,571 Deferred tax assets: Allowance for doubtful accounts 572 344 QAFMV tax credit carryforward 864 864 New hire tax credit 124 124 Compensated absences 460 410 Self-insurance allowances 188 149 Share-based compensation - 61 Marketable equity securities 2,200 750 Net operating loss carryover 17,241 7,975 Other 203 203 Total deferred tax assets 21,852 10,880 Net deferred tax liability $ 61,897 $ 54,691
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]	201 8 201 7 201 6 (in thousands) Amount Percent Amount Percent Amount Percent Income tax at the statutory federal rate $ 6,582 21.0 $ 4,975 34.0 $ 6,042 34.0 Impact of the Tax Cuts and Jobs Act (1) - - (29,255 ) (199.9 ) - - Nondeductible expenses 80 0.2 72 0.5 130 0.7 State income taxes/other—net of federal benefit 685 2.2 (60 ) (0.5 ) 499 2.8 Total income tax (benefit) expense $ 7,347 23.4 $ (24,268 ) (165.9 ) $ 6,671 37.5
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]	201 8 201 7 201 6 (in thousands) Current: Federal $ (48 ) $ (79 ) $ (225 ) State 189 441 238 Total current income tax provision 141 362 13 Deferred: Federal 6,185 (24,622 ) 5,506 State 1,021 (8 ) 1,152 Total deferred income tax (benefit) provision 7,206 (24,630 ) 6,658 Total income tax (benefit) expense $ 7,347 $ (24,268 ) $ 6,671

Note 14 - Stock-based Compens_2

Note 14 - Stock-based Compensation (Tables)	12 Months Ended
	Dec. 31, 2018
Notes Tables
Share-based Compensation, Stock Options, Activity [Table Text Block]	Shares Under Option Weighted- Average Exercise Price Outstanding—January 1, 2016: 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 Granted - - Exercised (45,005 ) 10.79 Canceled (63 ) 10.90 Outstanding—December 31, 2018: - $ - Options exercisable—December 31, 2018: - $ -
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]	Restricted Stock Number of Shares Weighted- Average Grant Date Fair Value Nonvested at January 1, 2018 104,150 $ 17.14 Granted 34,932 36.35 Canceled/forfeited/expired (150 ) 42.65 Vested (38,015 ) 18.91 Nonvested at December 31, 2018 100,917 $ 23.09

Note 15 - Earnings Per Share (T

Note 15 - Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2018
Notes Tables
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	For the Year Ended December 31, 201 8 201 7 201 6 (in thousands, except per share data) Net income $ 23,994 $ 38,899 $ 11,101 Basic weighted average common shares outstanding 6,083 6,331 6,627 Dilutive effect of common stock equivalents 76 67 22 Diluted weighted average common shares outstanding 6,159 6,398 6,649 Basic earnings per share $ 3.94 $ 6.14 $ 1.68 Diluted earnings per share $ 3.90 $ 6.08 $ 1.67

Note 19 - Fair Value of Finan_2

Note 19 - Fair Value of Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2018
Notes Tables
Fair Value, Assets Measured on Recurring Basis [Table Text Block]	2018 2017 Total Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Marketable equity securities $ 27,549 $ 27,549 - - $ 26,664 $ 26,664 - -
Fair Value, by Balance Sheet Grouping [Table Text Block]	201 8 201 7 Carrying Value Estimated Fair Value Carrying Value Estimated Fair Value (in thousands) Long-term debt $ 211,031 $ 210,234 $ 172,636 $ 171,289

Note 21 - Quarterly Results o_2

Note 21 - Quarterly Results of Operations (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2018
Notes Tables
Quarterly Financial Information [Table Text Block]	201 8 Three Months Ended March 31 June 30 September 30 December 31 (in thousands, except per share data) Operating revenues $ 119,458 $ 135,302 $ 140,325 $ 138,176 Operating expenses and costs 115,702 125,285 127,172 123,500 Operating income 3,756 10,017 13,153 14,676 Non-operating (loss) income (879 ) 632 935 (4,704 ) Interest expense (1,160 ) (1,355 ) (1,711 ) (2,019 ) Income tax (expense) benefit (330 ) (2,005 ) (3,129 ) (1,883 ) Net income $ 1,387 $ 7,289 $ 9,248 $ 6,070 Net income per common share: Basic $ 0.22 $ 1.18 $ 1.53 $ 1.02 Diluted $ 0.22 $ 1.17 $ 1.52 $ 1.01 Average common shares outstanding: Basic 6,168 6,159 6,034 5,975 Diluted 6,264 6,229 6,088 6,029 201 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 income 2,052 650 2,767 384 Interest expense (977 ) (935 ) (920 ) (1,070 ) Income tax 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

Note 1 - Accounting Policies (D

Note 1 - Accounting Policies (Details Textual) - USD ($)	Jan. 24, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Bank Overdrafts		$ 3,669,000	$ 4,377,000
Due from Employees, Current		220,000	448,000
Other Receivables, Net, Current, Total		3,814,000	3,028,000
Impairment of Long-Lived Assets Held-for-use		0	0
Increase in Depreciation Expense, As Result of Adjustments to Estimated Useful Lives and Salvage Values		$ 1,000,000	2,700,000	$ 1,300,000
Period for Amortizing Prepaid Tires		2 years
Advertising Expense		$ 1,234,000	$ 1,087,000	$ 1,019,000
Reclassification of Gain (Loss) Unrealized on Equity Securities from AOCI to Retained Earnings		(7,444,000)
AOCI Attributable to Parent [Member]
Reclassification of Gain (Loss) Unrealized on Equity Securities from AOCI to Retained Earnings		(7,444,000)
Accounting Standards Update 2016-01 [Member] | AOCI Attributable to Parent [Member]
Reclassification of Gain (Loss) Unrealized on Equity Securities from AOCI to Retained Earnings		(7,400,000)
Line of Credit [Member]
Line of Credit Facility, Maximum Borrowing Capacity		$ 40,000,000
Line of Credit [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Basis Spread on Variable Rate		1.50%
Line of Credit [Member] | Subsequent Event [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 60,000,000
Debt Instrument, Term Extension	1 year
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	0.25%
Line of Credit Facility, Minimum Amount of Monthly Unused Capacity for Commitment Fee Percentage to Apply	$ 18,000,000
Line of Credit [Member] | Subsequent Event [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Basis Spread on Variable Rate	1.25%
Truckload Services [Member] | Sales Revenue, Services, Net [Member] | Product Concentration Risk [Member]
Concentration Risk, Percentage		80.00%	86.30%	88.40%
Independent Contractors [Member]
Other Receivables, Net, Current, Total		$ 1,724,000	$ 1,813,000

Note 1 - Accounting Policies -

Note 1 - Accounting Policies - Useful Lives of Property and Equipment (Details)	12 Months Ended
	Dec. 31, 2018
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)	8 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 3 - Trade Accounts Recei_3

Note 3 - Trade Accounts Receivable - Accounts Receivable Balances (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Billed	$ 56,766	$ 51,236
Unbilled	8,808	9,154
Allowance for doubtful accounts	(2,224)	(1,335)	$ (994)	$ (549)
Total accounts receivable—net	$ 63,350	$ 59,055

Note 3 - Trade Accounts Recei_4

Note 3 - Trade Accounts Receivable - Changes in Allowance for Doubtful Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Balance—beginning of year	$ 1,335	$ 994	$ 549
Provision for bad debts	889	341	445
Charge-offs
Recoveries
Balance—end of year	$ 2,224	$ 1,335	$ 994

Note 4 - Marketable Equity Se_3

Note 4 - Marketable Equity Securities (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Equity Securities, Impairment Loss, Cumulative Amount		$ 2,314,000
Investment Income, Dividend	$ 1,171,000	999,000	$ 1,024,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total	12,399,000	2,980,000
Available-for-sale Equity Securities, Gross Unrealized Loss	$ 3,721,000	$ 126,000
Debt, Weighted Average Interest Rate	3.11%	2.07%
Margin Account Borrowings [Member] | Accrued Expenses and Other Liabilities [Member]
Short-term Debt, Total	$ 11,281,000	$ 5,903,000

Note 4 - Marketable Equity Se_4

Note 4 - Marketable Equity Securities - Securities Classified As Available-for-sale (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Available-for-sale securities:
Fair market value	$ 27,549	$ 26,664
Cost	25,602	16,640
Unrealized gain	$ 1,947	$ 10,024

Note 4 - Marketable Equity Se_5

Note 4 - Marketable Equity Securities - Unrealized Gains and Losses on Marketable Equity Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Gross unrealized gains	$ 5,668	$ 10,150
Gross unrealized losses	3,721	126
Net unrealized gains	$ 1,947	$ 10,024

Note 4 - Marketable Equity Se_6

Note 4 - Marketable Equity Securities - Realized Gains on Marketable Equity Securities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Sale proceeds	$ 1,044	$ 6,833	$ 1,550
Cost of securities sold	669	2,098	547
Realized gains	375	4,735	1,003
Realized gains, net of taxes	$ 278	$ 2,938	$ 627

Note 5 - Accrued Expenses and_3

Note 5 - Accrued Expenses and Other Liabilities - Accrued Expenses and Other Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Payroll	$ 2,955	$ 2,710
Accrued vacation	1,987	1,762
Taxes—other than income	2,319	2,488
Interest	249	99
Driver escrows	2,722	2,381
Margin account borrowings	11,281	5,903
Self-insurance claims	1,984	2,266
Total accrued expenses and other liabilities	$ 23,497	$ 17,609

Note 6 - Claims Liabilities (De

Note 6 - Claims Liabilities (Details Textual)	Dec. 31, 2018USD ($)
Workers Compensation Self Insured Retention	$ 500,000
Workers Compensation Per Occurrence Excess Policy	500,000
Letters of Credit Outstanding, Amount	700,000
Stop Loss for Self Insurance for Employee Health Claims Per Covered Employee Per Year	325,000
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	515,000
Certificates of Deposit, at Carrying Value	$ 300,000

Note 7 - Long-term Debt (Detail

Note 7 - Long-term Debt (Details Textual)	12 Months Ended
	Dec. 31, 2018USD ($)
Letters of Credit Outstanding, Amount	$ 700,000
Line of Credit [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 40,000,000
Line of Credit Facility, Interest Rate at Period End	3.85%
Ratio of Indebtedness to Net Capital	4
Line of Credit Facility, Outstanding Advances	$ 10,900,000
Letters of Credit Outstanding, Amount	700,000
Line of Credit Facility, Remaining Borrowing Capacity	$ 29,100,000
Line of Credit [Member] | Equipment Financing [Member]
Long-term Debt, Weighted Average Interest Rate, at Point in Time	3.61%
Line of Credit [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Basis Spread on Variable Rate	1.50%

Note 7 - Long-term Debt - Summa

Note 7 - Long-term Debt - Summary of Long-term Debt (Details) - USD ($) $ in Thousands		Dec. 31, 2018	Dec. 31, 2017
Long-term debt		$ 221,223	$ 172,636
Less current maturities		(63,908)	(73,641)
Long-term debt—net of current maturities		157,315	98,995
Line of Credit [Member]
Long-term debt	[1]	10,192
Secured Debt [Member]
Long-term debt	[2]	$ 211,031	$ 172,636
[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% (3.85% at December 31, 2018) 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 2018. At December 31, 2018, outstanding advances on the line were approximately $10.9 million, including letters of credit totaling $0.7 million, with availability to borrow $29.1 million.
[2]	Equipment financings consist of installment obligations for revenue equipment purchases, payable in various monthly installments with various maturity dates through October 2025, at a weighted average interest rate of 3.61% as of December 31, 2018 and collateralized by revenue equipment.

Note 7 - Long-term Debt - Annua

Note 7 - Long-term Debt - Annual Maturities on Long-term Debt Outstanding (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
2019	$ 63,908
2020	67,636
2021	28,505
2022	18,558
2023	37,656
2024	3,013
2025	1,947
Total	$ 221,223	$ 172,636

Note 8 - Noncash Investing an_2

Note 8 - Noncash Investing and Financing Activities (Details Textual) $ in Millions	12 Months Ended
	Dec. 31, 2018USD ($)
Noncash or Part Noncash Acquisition, Fixed Assets Acquired	$ 68.1

Note 9 - Capital Stock (Details

Note 9 - Capital Stock (Details Textual) - USD ($)	Jun. 08, 2018	May 08, 2018	Nov. 10, 2017	Oct. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Apr. 30, 2017
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, Total					11,612,144	11,529,124
Common Stock, Shares, Outstanding, Ending Balance					5,956,558	6,160,889
Preferred Stock, Shares Issued, Total					0	0
Treasury Stock, Value, Acquired, Cost Method					$ 13,369,000	$ 6,348,000	$ 21,056,000
Treasury Stock, Shares, Ending Balance					5,655,586	5,368,235
Treasury Stock, Value, Ending Balance					$ 142,552,000	$ 129,183,000
The 2018 Tender Offer [Member]
Stock Repurchase Program, Number of Shares Authorized to be Repurchased		100,000
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		124,248
Treasury Stock, Shares, Acquired	185,597
Treasury Stock Acquired, Average Cost Per Share	$ 40
Treasury Stock, Value, Acquired, Cost Method	$ 7,500,000
The 2018 Tender Offer [Member] | Minimum [Member]
Treasury Stock Acquired Cost Per Share		$ 39
The 2018 Tender Offer [Member] | Maximum [Member]
Treasury Stock Acquired Cost Per Share		$ 43
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
September 2011 Reauthorization [Member]
Stock Repurchase Program, Number of Shares Authorized to be Repurchased								500,000
Treasury Stock, Shares, Acquired					101,754	110,316

Note 10 - Comprehensive Incom_3

Note 10 - Comprehensive Income (Loss) - Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Balance, beginning of period	$ 7,444
Net other comprehensive income (loss)		$ (32)	$ 2,166
Balance, end of period		7,444
Cumulative effect adjustment – ASU 2016-01	(7,444)
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]
Balance, beginning of period	7,444	7,476
Other comprehensive income before reclassifications		2,001
Amounts reclassified from accumulated other comprehensive income, net of tax benefit		(2,033)
Net other comprehensive income (loss)	(7,444)	(32)
Balance, end of period		$ 7,444	$ 7,476

Note 10 - Comprehensive Incom_4

Note 10 - 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
AOCI tax, balance	$ 2,579	$ 4,576
OCI before reclassifications, tax	(687)
Reclassification from AOCI, tax	$ (1,310)

Note 10 - Comprehensive Incom_5

Note 10 - Comprehensive Income (Loss) - Reclassification Out of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
NON-OPERATING (EXPENSE) INCOME	$ (4,704)	$ 935	$ 632	$ (879)	$ 384	$ 2,767	$ 650	$ 2,052	$ (4,016)	$ 5,853	$ 1,485
Total before tax									31,341	14,631	17,772
Tax expense	1,883	3,129	2,005	330	(28,895)	2,169	1,004	1,454	(7,347)	24,268	(6,671)
NET INCOME	$ 6,070	$ 9,248	$ 7,289	$ 1,387	$ 31,561	$ 3,446	$ 1,609	$ 2,283	23,994	38,899	$ 11,101
Reclassification out of Accumulated Other Comprehensive Income [Member]
Total before tax										3,343
Tax expense										(1,310)
NET INCOME										2,033
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]
NON-OPERATING (EXPENSE) INCOME										3,385
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Other-than-Temporary Impairment Attributable to Parent [Member]
NON-OPERATING (EXPENSE) INCOME										$ (42)

Note 11 - Segment Information_3

Note 11 - Segment Information, Significant Customers, Industry Concentration and Geographic Areas (Details Textual) - Customer Concentration Risk [Member] - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Sales Revenue, Services, Net [Member] | Five Largest Customers [Member]
Concentration Risk, Percentage	42.00%	41.00%	43.00%
Sales Revenue, Services, Net [Member] | Fiat Chrysler Automobiles [Member]
Concentration Risk, Percentage	16.00%	10.00%	9.00%
Sales Revenue, Services, Net [Member] | General Motors Company [Member]
Concentration Risk, Percentage	13.00%	18.00%	18.00%
Sales Revenue, Services, Net [Member] | Ford Motor Company [Member]
Concentration Risk, Percentage	8.00%	9.00%	10.00%
Revenue Provided to the Automobile Manufacturing Industry [Member]
Concentration Risk, Percentage	46.00%	46.00%	45.00%
Accounts Receivable [Member]
Accounts Receivable, Gross, Current	$ 30,848,000	$ 29,788,000

Note 11 - Segment Information_4

Note 11 - Segment Information, Significant Customers, Industry Concentration, and Geographic Areas - Revenue Dollars and Percentages by Geographic Area (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Operating revenues	$ 138,176	$ 140,325	$ 135,302	$ 119,458	$ 110,888	$ 108,899	$ 108,646	$ 109,405	$ 533,261	$ 437,838	$ 432,852
Motor Carrier [Member]
Operating revenues									$ 533,261	$ 437,838	$ 432,852
Motor Carrier [Member] | Sales Revenue, Net [Member] | Geographic Concentration Risk [Member]
Operating Revenues, percentage									100.00%	100.00%	100.00%
Motor Carrier [Member] | UNITED STATES
Operating revenues									$ 302,754	$ 255,197	$ 251,390
Motor Carrier [Member] | UNITED STATES | Sales Revenue, Net [Member] | Geographic Concentration Risk [Member]
Operating Revenues, percentage									56.80%	58.30%	58.10%
Motor Carrier [Member] | MEXICO
Operating revenues									$ 229,350	$ 181,099	$ 181,159
Motor Carrier [Member] | MEXICO | Sales Revenue, Net [Member] | Geographic Concentration Risk [Member]
Operating Revenues, percentage									43.00%	41.40%	41.90%
Motor Carrier [Member] | CANADA
Operating revenues									$ 1,157	$ 1,542	$ 303
Motor Carrier [Member] | CANADA | Sales Revenue, Net [Member] | Geographic Concentration Risk [Member]
Operating Revenues, percentage									0.20%	0.30%

Note 13 - Federal and State I_3

Note 13 - Federal and State Income Taxes (Details Textual) - USD ($)	Dec. 21, 2017	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	35.00%		21.00%	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
Deferred Tax Assets, Tax Credit Carryforwards, General Business			988,000
Operating Loss Carryforwards, Total			66,983,000
Income Tax Examination, Penalties and Interest Expense, Total			$ 0	$ 0
Statute of Limitations			3 years
Receivables, Long-term Contracts or Programs, Total		29,000		29,000
Deferred Tax Assets, Valuation Allowance, Total		$ 0	$ 0	$ 0

Note 13 - Federal and State I_4

Note 13 - Federal and State Income Taxes - Significant Components of Deferred Tax Liabilities and Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Deferred tax liabilities:
Property and equipment	$ 78,502	$ 60,388
Unrealized gains on securities	2,580	2,580
Prepaid expenses and other	2,667	2,603
Total deferred tax liabilities	83,749	65,571
Deferred tax assets:
Allowance for doubtful accounts	572	344
QAFMV tax credit carryforward	864	864
New hire tax credit	124	124
Compensated absences	460	410
Self-insurance allowances	188	149
Share-based compensation		61
Marketable equity securities	2,200	750
Net operating loss carryover	17,241	7,975
Other	203	203
Total deferred tax assets	21,852	10,880
Net deferred tax liability	$ 61,897	$ 54,691

Note 13 - Federal and State I_5

Note 13 - Federal and State Income Taxes - Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands		Dec. 21, 2017	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income tax at the statutory federal rate, amount											$ 6,582	$ 4,975	$ 6,042
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent		35.00%									21.00%	34.00%	34.00%
Impact of the Tax Cuts and Jobs Act, amount	[1]											$ (29,255)
Impact of the Tax Cuts and Jobs Act, percent	[1]											(199.90%)
Nondeductible expenses, amount											$ 80	$ 72	$ 130
Nondeductible expenses, percent											0.20%	0.50%	0.70%
State income taxes/other—net of federal benefit, amount											$ 685	$ (60)	$ 499
State income taxes/other—net of federal benefit, percent											2.20%	(0.50%)	2.80%
Total income tax (benefit) expense			$ (1,883)	$ (3,129)	$ (2,005)	$ (330)	$ 28,895	$ (2,169)	$ (1,004)	$ (1,454)	$ 7,347	$ (24,268)	$ 6,671
Total income tax (benefit) expense, percent											23.40%	(165.90%)	37.50%
[1]	On December 22, 2017, the Tax Cuts and Jobs Act (the Act) was signed into law. The Act included numerous changes to existing tax law, including a permanent reduction in the federal corporate income tax rate from 35% to 21% effective January 1, 2018 and repeal of the alternative minimum tax (AMT) allowing a refund of existing AMT carryovers during the years 2018 through 2021. As a result, the Company recorded a tax benefit of $29.3 million in the fourth quarter of 2017 related to the revaluation of its net deferred tax liabilities.

Note 13 - Federal and State I_6

Note 13 - Federal and State Income Taxes - Components of Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Current:
Federal									$ (48)	$ (79)	$ (225)
State									189	441	238
Total current income tax provision									141	362	13
Deferred:
Federal									6,185	(24,622)	5,506
State									1,021	(8)	1,152
Total deferred income tax (benefit) provision									7,206	(24,630)	6,658
Total income tax (benefit) expense	$ (1,883)	$ (3,129)	$ (2,005)	$ (330)	$ 28,895	$ (2,169)	$ (1,004)	$ (1,454)	$ 7,347	$ (24,268)	$ 6,671

Note 14 - Stock-based Compens_3

Note 14 - Stock-based Compensation (Details Textual) - USD ($)	May 29, 2014	Dec. 31, 2018	Mar. 31, 2018	Apr. 30, 2017	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
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, Outstanding, Number, Ending Balance										45,068	56,131	66,098
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value									$ 719,000	$ 256,000	$ 273,000
Allocated Share-based Compensation Expense, Total									732,000	614,000	302,000
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense									$ 172,000	$ 231,000	$ 113,000
Allocated Share-based Compensation Expense, Impact on Earnings Per Share, Diluted									$ 0.09		$ 0.03
Allocated Share-based Compensation Expense, Impact on Earnings Per Share, Basic									$ 0.10		0.02
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Total		$ 1,864,000							$ 1,864,000
Allocated Share-based Compensation Expense, Impact on Earnings Per Share, Basic and Diluted										$ 0.26
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares, Ending Balance										0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value									$ 6.34		$ 6.07
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value									$ 1,406,000	$ 82,000	$ 101,000
Proceeds from Stock Options Exercised									485,000	$ 123,000	91,000
Amortization, Current Year [Member]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Total		846,000							846,000
Amortization Year 2 [Member]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Total		430,000							430,000
Amortization, Year 3 [Member]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Total		294,000							294,000
Amortization, Year 4 [Member]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Total		$ 294,000							$ 294,000
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross									34,932
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares, Ending Balance		100,917							100,917	104,150
Accrual Shares to Each Non-employee Director [Member]
Allocated Share-based Compensation Expense, Total									$ 70,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Grants in Period									276
Nonqualified Options [Member] | Annual Grant to Non-employee [Member]
Allocated Share-based Compensation Expense, Total										$ 70,000	$ 70,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Grants in Period							614	325
The 2014 Stock Option Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	750,000
Number of Common Stock Accrued Under Share-based Compensation Plan for Each Non-employee Director			1,932		4,298	2,275
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross									0	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Ending Balance		0							0
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant		405,000							405,000
The 2014 Stock Option Plan [Member] | Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period		33,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value		$ 36.35
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period		4 years
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		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] | Stock Award [Member] | Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value			$ 36.35		$ 16.29	$ 30.80
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%

Note 14 - Stock-based Compens_4

Note 14 - Stock-based Compensation - Employee Stock Option Activity (Details) - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Outstanding (in shares)	45,068	56,131	66,098
Outstanding (in dollars per share)	$ 10.79	$ 10.85	$ 10.92
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period
Granted (in dollars per share)
Exercised (in shares)	(45,005)	(11,063)	(7,917)
Exercised (in dollars per share)	$ 10.79	$ 11.13	$ 11.41
Canceled (in shares)	(63)		(2,050)
Canceled (in dollars per share)	$ 10.90		$ 10.91
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	0	0	0
Outstanding (in shares)		45,068	56,131
Outstanding (in dollars per share)		$ 10.79	$ 10.85
Options exercisable (in shares)
Options exercisable (in dollars per share)

Note 14 - Stock-based Compens_5

Note 14 - Stock-based Compensation - Summary of Nonvested Restricted Stock (Details) - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Nonvested, stock options (in shares)	0
Granted, stock options (in shares)	0	0	0
Nonvested, stock options (in shares)		0
Restricted Stock [Member]
Nonvested, stock options (in shares)	104,150
Nonvested - weighted average grant date fair value, stock options (in dollars per share)	$ 17.14
Granted, stock options (in shares)	34,932
Granted (in dollars per share)	$ 36.35
Canceled/forfeited/expired, stock options (in shares)	(150)
Canceled/forfeited/expired - weighted average grant date fair value, stock options (in dollars per share)	$ 42.65
Vested, stock options (in shares)	(38,015)
Vested - weighted average grant date fair value, stock options (in dollars per share)	$ 18.91
Nonvested, stock options (in shares)	100,917	104,150
Nonvested - weighted average grant date fair value, stock options (in dollars per share)	$ 23.09	$ 17.14

Note 15 - Earnings Per Share -

Note 15 - 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, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Net income									$ 23,994	$ 38,899	$ 11,101
Basic (in shares)	5,975	6,034	6,159	6,168	6,219	6,326	6,381	6,399	6,083	6,331	6,627
Dilutive effect of common stock equivalents (in shares)									76	67	22
Diluted weighted average common shares outstanding (in shares)	6,029	6,088	6,229	6,264	6,312	6,373	6,430	6,425	6,159	6,398	6,649
Basic (in dollars per share)	$ 1.02	$ 1.53	$ 1.18	$ 0.22	$ 5.07	$ 0.54	$ 0.25	$ 0.36	$ 3.94	$ 6.14	$ 1.68
Diluted (in dollars per share)	$ 1.01	$ 1.52	$ 1.17	$ 0.22	$ 5	$ 0.54	$ 0.25	$ 0.36	$ 3.90	$ 6.08	$ 1.67

Note 16 - Benefit Plan (Details

Note 16 - Benefit Plan (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
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	$ 176,000	$ 179,000	$ 161,000

Note 17 - Commitments and Con_2

Note 17 - Commitments and Contingencies (Details Textual)	12 Months Ended
	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Dec. 31, 2015	Dec. 31, 2014
Operating Leases Number of Trucks		56		471	471
Operating Leases, Rent Expense, Total	$ 47,000	$ 5,460,000	$ 10,294,000

Note 18 - Lease Income (Details

Note 18 - Lease Income (Details Textual) - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Trucks [Member]
Property Subject to or Available for Operating Lease, Gross	$ 61,061,000	$ 42,206,000
Property Subject to or Available for Operating Lease, Net, Total	34,299,000	17,028,000
Operating Leases, Future Minimum Payments Receivable, Total	$ 22,319,000	9,360,000
Trucks [Member] | Minimum [Member]
Lessor, Operating Lease, Term of Contract	210 days
Trucks [Member] | Maximum [Member]
Lessor, Operating Lease, Term of Contract	5 years
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, Total	1,138,000	$ 1,195,000
Operating Leases, Future Minimum Payments Receivable, Total	$ 12,000

Note 19 - Fair Value of Finan_3

Note 19 - Fair Value of Financial Instruments - Securities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Marketable equity securities	$ 27,549	$ 26,664
Fair Value, Inputs, Level 1 [Member]
Marketable equity securities	27,549	26,664
Fair Value, Inputs, Level 2 [Member]
Marketable equity securities	0
Fair Value, Inputs, Level 3 [Member]
Marketable equity securities	$ 0

Note 19 - Fair Value of Finan_4

Note 19 - 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, 2018	Dec. 31, 2017
Reported Value Measurement [Member]
Long-term debt	$ 211,031	$ 172,636
Estimate of Fair Value Measurement [Member]
Long-term debt	$ 210,234	$ 171,289

Note 20 - Related Party Trans_2

Note 20 - Related Party Transactions (Details Textual) - Majority Shareholder [Member] - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenue from Related Parties	$ 2,854,000	$ 585,000	$ 4,834,000
Related Party Transaction, Expenses from Transactions with Related Party	9,859,000	7,497,000	8,837,000
Due from Related Parties, Total	149,000	21,000
Due to Related Parties, Total	2,161,000	971,000
Freight Transportation [Member]
Accounts Receivable, Related Parties	147,000	19,000
Maintenance Performed and Charges Paid to Third Parties on Behalf of Their Affiliate and Charged Back [Member]
Accounts Receivable, Related Parties	2,000	2,000
Insurance Premiums Paid in Excess of Amounts Earned [Member]
Accounts Receivable, Related Parties	29,000	1,385,000
Physical Damage Coverage [Member]
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party	1,271,000	1,808,000	2,091,000
Auto Liability Coverage [Member]
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party	10,987,000	10,860,000	11,030,000
General Liability Coverage [Member]
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party	24,000	35,000	21,000
Workers Compensation Coverage [Member]
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party	$ 301,000	$ 286,000	$ 298,000

Note 21 - Quarterly Results o_3

Note 21 - 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, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Operating revenues	$ 138,176	$ 140,325	$ 135,302	$ 119,458	$ 110,888	$ 108,899	$ 108,646	$ 109,405	$ 533,261	$ 437,838	$ 432,852
Operating expenses and costs	123,500	127,172	125,285	115,702	107,536	105,131	105,748	106,743	491,659	425,158	412,924
Operating income	14,676	13,153	10,017	3,756	3,352	3,768	2,898	2,662	41,602	12,680	19,928
Non-operating (loss) income	(4,704)	935	632	(879)	384	2,767	650	2,052	(4,016)	5,853	1,485
Interest expense	(2,019)	(1,711)	(1,355)	(1,160)	(1,070)	(920)	(935)	(977)	(6,245)	(3,902)	(3,641)
Income tax (expense) benefit	(1,883)	(3,129)	(2,005)	(330)	28,895	(2,169)	(1,004)	(1,454)	7,347	(24,268)	6,671
Net income	$ 6,070	$ 9,248	$ 7,289	$ 1,387	$ 31,561	$ 3,446	$ 1,609	$ 2,283	$ 23,994	$ 38,899	$ 11,101
Basic (in dollars per share)	$ 1.02	$ 1.53	$ 1.18	$ 0.22	$ 5.07	$ 0.54	$ 0.25	$ 0.36	$ 3.94	$ 6.14	$ 1.68
Diluted (in dollars per share)	$ 1.01	$ 1.52	$ 1.17	$ 0.22	$ 5	$ 0.54	$ 0.25	$ 0.36	$ 3.90	$ 6.08	$ 1.67
Basic (in shares)	5,975	6,034	6,159	6,168	6,219	6,326	6,381	6,399	6,083	6,331	6,627
Diluted (in shares)	6,029	6,088	6,229	6,264	6,312	6,373	6,430	6,425	6,159	6,398	6,649
Total income tax (benefit) expense	$ (1,883)	$ (3,129)	$ (2,005)	$ (330)	$ 28,895	$ (2,169)	$ (1,004)	$ (1,454)	$ 7,347	$ (24,268)	$ 6,671