10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C.  20549

FORM 10-Q

(Mark One)

þ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended March 31, 2019

OR

o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from ________ to_________

Commission File Number: 1-33891

ORION GROUP HOLDINGS, INC.

 (Exact name of registrant as specified in its charter)

DELAWARE	26-0097459
(State of incorporation)	(I.R.S. Employer Identification Number)

12000 Aerospace Avenue, Suite 300 Houston, Texas	77034
(Address of principal executive offices)	(Zip Code)

713-852-6500

(Registrant’s telephone number, including area code)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.

Yes þ  No ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate website, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).

Yes þ   No ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an emerging growth company.  See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and "emerging growth company" in Rule 12b-2 of the Exchange Act. (Check one)

Large accelerated filer ¨  Accelerated filer þ  Non-accelerated filer þSmaller reporting company ¨  Emerging growth company  ¨

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act ¨

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).  Yes ¨  No þ

As of May 9, 2019, 29,070,639 shares of the registrant’s common stock, $0.01 par value, were outstanding.

1

ORION GROUP HOLDINGS, INC.

Quarterly Report on Form 10-Q for the period ended March 31, 2019

INDEX

PART I	FINANCIAL INFORMATION
	Item 1	Financial Statements (Unaudited)	Page
		Consolidated Balance Sheets at March 31, 2019 and December 31, 2018	3
		Consolidated Statements of Operations for the Three Months Ended March 31, 2019 and 2018	4
		Consolidated Statements of Comprehensive (Loss) Income for the Three Months Ended March 31, 2019 and 2018	5
		Consolidated Statement of Stockholders’ Equity for the Three Months Ended March 31, 2019	6
		Consolidated Statements of Cash Flows for the Three Months Ended March 31, 2019 and 2018	7
		Notes to Consolidated Financial Statements	8
	Item 2	Management’s Discussion and Analysis of Financial Condition and Results of Operations	27
	Item 3	Quantitative and Qualitative Disclosures About Market Risk	34
	Item 4	Controls and Procedures	34
PART II	OTHER INFORMATION
	Item1	Legal Proceedings	34
	Item 1A	Risk Factors	34
	Item 2	Unregistered Sale of Equity Securities and Use of Proceeds	34
	Item 3	Defaults upon Senior Securities	35
	Item 4	Mine Safety Disclosures	35
	Item 5	Other Information	35
	Item 6	Exhibits	36
	SIGNATURES		37

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Part I - Financial Information

Item 1 Financial Statements

Orion Group Holdings, Inc. and Subsidiaries

Consolidated Balance Sheets

(In Thousands, Except Share and Per Share Information)

	March 31, 2019			December 31, 2018
ASSETS	(Unaudited)
Current assets:
Cash and cash equivalents	$	2,625		$	8,684
Accounts receivable:
Trade, net of allowance of $4,280 and $4,280, respectively	84,482			77,641
Retainage	34,382			30,734
Other current	3,064			4,257
Income taxes receivable	600			467
Inventory	910			1,056
Costs and estimated earnings in excess of billings on uncompleted contracts	15,133			9,217
Prepaid expenses and other	4,853			5,000
Total current assets	146,049			137,056
Property and equipment, net of depreciation	136,841			148,003
Operating lease right-of-use assets, net of amortization	22,002			—
Financing lease right-of-use assets, net of amortization	8,618			—
Inventory, non-current	7,534			7,598
Intangible assets, net of amortization	14,127			14,787
Other non-current	5,620			5,426
Total assets	$	340,791		$	312,870
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current liabilities:
Current debt, net of debt issuance costs	$	2,950		$	2,946
Accounts payable:
Trade	42,611			42,023
Retainage	622			736
Accrued liabilities	13,631			18,840
Taxes payable	533			—
Billings in excess of costs and estimated earnings on uncompleted contracts	35,865			21,761
Current portion of operating lease liabilities	5,595			—
Current portion of financing lease liabilities	2,875			—
Total current liabilities	104,682			86,306
Long-term debt, net of debt issuance costs	76,492			76,119
Operating lease liabilities	17,109			—
Financing lease liabilities	4,862			—
Other long-term liabilities	3,151			8,759
Deferred income taxes	83			49
Interest rate swap liability	336			52
Total liabilities	206,715			171,285
Stockholders’ equity:
Preferred stock -- $0.01 par value, 10,000,000 authorized, none issued	—			—
Common stock -- $0.01 par value, 50,000,000 authorized, 29,786,007 and 29,611,989 issued; 29,074,776 and 28,900,758 outstanding at March 31, 2019 and December 31, 2018, respectively	297			296
Treasury stock, 711,231 shares, at cost, as of March 31, 2019 and December 31, 2018, respectively	(6,540		)	(6,540		)
Other comprehensive loss	(336		)	(52		)
Additional paid-in capital	180,440			179,742
Retained loss	(39,785		)	(31,861		)
Total stockholders’ equity	134,076			141,585
Total liabilities and stockholders’ equity	$	340,791		$	312,870

The accompanying notes are an integral part of these consolidated financial statements

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Orion Group Holdings, Inc. and Subsidiaries

Consolidated Statements of Operations

(In Thousands, Except Share and Per Share Information)

(Unaudited)

	Three months ended March 31,
	2019			2018
Contract revenues	$	143,105		$	136,843
Costs of contract revenues	132,886			121,021
Gross profit	10,219			15,822
Selling, general and administrative expenses	16,770			15,014
Gain on sale of assets, net	(374		)	(813		)
Other gain from continuing operations	—			(5,448		)
Operating (loss) income from operations	(6,177		)	7,069
Other (expense) income:
Other income (expense)	23			(2		)
Interest income	148			—
Interest expense	(1,325		)	(1,477		)
Other expense, net	(1,154		)	(1,479		)
(Loss) income before income taxes	(7,331		)	5,590
Income tax expense	593			1,489
Net (loss) income	$	(7,924	)	$	4,101
Basic (loss) income per share	$	(0.27	)	$	0.15
Diluted (loss) income per share	$	(0.27	)	$	0.14
Shares used to compute (loss) income per share:
Basic	28,927,406			28,143,791
Diluted	28,927,406			28,369,762

The accompanying notes are an integral part of these consolidated financial statements

4

Orion Group Holdings, Inc. and Subsidiaries

Consolidated Statements of Comprehensive (Loss) Income

(In Thousands)

(Unaudited)

	Three months ended March 31,
	2019			2018
Net (loss) income	$	(7,924	)	$	4,101
Change in fair value of cash flow hedge, net of tax benefit of $80 and net of tax expense of $93 for the three months ended March 31, 2019, and March 31, 2018, respectively	(284		)	269
Total comprehensive (loss) income	$	(8,208	)	$	4,370

The accompanying notes are an integral part of these consolidated financial statements

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Orion Group Holdings, Inc. and Subsidiaries

Consolidated Statement of Stockholders’ Equity

(In Thousands, Except Share Information)

(Unaudited)

	Common Stock				Treasury Stock					Other Comprehensive Loss			Additional Paid-In Capital			Retained Earnings
	Shares		Amount		Shares		Amount												Total
Balance, December 31, 2018	29,611,989		$	296	(711,231	)	$	(6,540	)	$	(52	)	$	179,742		$	(31,861	)	$	141,585
Stock-based compensation	—		—		—		—			—			664			—			664
Exercise of stock options	7,021		—		—		—			—			35			—			35
Issuance of restricted stock	185,204		1		—		—			—			(1		)	—			—
Cash flow hedge, net of tax	—		—		—		—			(284		)	—			—			(284		)
Forfeiture of restricted stock	(18,207	)	—		—		—			—			—			—			—
Net loss	—		—		—		—			—			—			(7,924		)	(7,924		)
Balance, March 31, 2019	29,786,007		$	297	(711,231	)	$	(6,540	)	$	(336	)	$	180,440		$	(39,785	)	$	134,076

The accompanying notes are an integral part of these consolidated financial statements

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Orion Group Holdings, Inc. and Subsidiaries

Consolidated Statements of Cash Flows

(In Thousands)

(Unaudited)

	Three months ended March 31,
	2019			2018
Cash flows from operating activities:
Net (loss) income	$	(7,924	)	$	4,101
Adjustments to reconcile net (loss) income to net cash (used in) provided by
Operating activities:
Depreciation and amortization	7,040			6,780
Deferred financing cost amortization	84			337
Deferred income taxes	34			1,117
Stock-based compensation	664			334
Gain on sale of property and equipment	(374		)	(813		)
Other gain from continuing operations	—			(5,448		)
Change in operating assets and liabilities:
Accounts receivable	(9,296		)	10,954
Notes receivable	104			—
Income tax receivable	(133		)	(49		)
Inventory	210			688
Prepaid expenses and other	151			(437		)
Costs and estimated earnings in excess of billings on uncompleted contracts	(5,916		)	3,300
Accounts payable	474			(9,505		)
Accrued liabilities	(1,683		)	(2,283		)
Income tax payable	533			(19		)
Billings in excess of costs and estimated earnings on uncompleted contracts	14,104			1,846
Other	—			(286		)
Net cash (used in) provided by operating activities	(1,928		)	10,617
Cash flows from investing activities:
Proceeds from sale of property and equipment	400			306
Purchase of property and equipment	(3,862		)	(4,346		)
Contributions to CSV life insurance	(301		)	(146		)
Proceeds from return of investment	—			93
Insurance claim proceeds related to property and equipment	—			1,150
Net cash used in investing activities	(3,763		)	(2,943		)
Cash flows from financing activities:
Borrowings from Credit Facility	11,000			—
Payments made on borrowings from Credit Facility	(10,750		)	(8,375		)
Loan costs from Credit Facility	43			—
Payments of finance lease liabilities	(696		)	—
Exercise of stock options	35			816
Net cash used in financing activities	(368		)	(7,559		)
Net change in cash and cash equivalents	(6,059		)	115
Cash and cash equivalents at beginning of period	8,684			9,086
Cash and cash equivalents at end of period	$	2,625		$	9,201
Supplemental disclosures of cash flow information:
Cash paid during the period for:
Interest	$	1,190		$	1,163
Taxes, net of refunds	$	151		$	25

The accompanying notes are an integral part of these consolidated financial statements

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Orion Group Holdings, Inc. and Subsidiaries

Notes to Consolidated Financial Statements

(Tabular Amounts in thousands, Except for Share and per Share Amounts)

(Unaudited)

1. Description of Business and Basis of Presentation

Description of Business

Orion Group Holdings, Inc., its subsidiaries and affiliates (hereafter collectively referred to as the "Company"), provide a broad range of specialty construction services in the infrastructure, industrial, and building sectors of the continental United States, Alaska and the Caribbean Basin. The Company’s marine segment services the infrastructure sector through marine transportation facility construction, marine pipeline construction, marine environmental structures, dredging of waterways, channels and ports, environmental dredging, design, and specialty services.  Its concrete segment services the building sector by providing turnkey concrete construction services including pour and finish, dirt work, layout, forming, rebar, and mesh across the light commercial, structural and other associated business areas. The Company is headquartered in Houston, Texas with offices throughout its operating areas.

The tools used by the chief operating decision maker ("CODM") to allocate resources and assess performance are based on two reportable and operating segments: marine, which operates under the Orion Marine Group brand and logo, and concrete, which operates under the TAS Commercial Concrete brand and logo.

Although we describe the business in this report in terms of the services the Company provides, its base of customers and the areas in which it operates, the Company has determined that its operations currently comprise two reportable segments pursuant to Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) Topic 280, Segment Reporting.

In making this determination, the Company considered the similar economic characteristics of its operations that comprise its marine segment. For the marine segment, the methods used, and the internal processes employed, to deliver marine construction services are similar throughout the segment, including standardized estimating, project controls and project management. This segment has the same customers with similar funding drivers, and it complies with regulatory environments driven through Federal agencies such as the U.S. Army Corps of Engineers, U.S. Fish and Wildlife Service, U.S. Environmental Protection Agency and U.S. Occupational Safety and Health Administration ("OSHA"), among others. Additionally, the segment is driven by macro-economic considerations including the level of import/export seaborne transportation, development of energy-related infrastructure, cruise line expansion and operations, marine bridge infrastructure development, waterway pipeline crossings and the maintenance of waterways. These considerations, and others, are key catalysts for future prospects and are similar across the segment.

For the concrete segment, the Company also considered the similar economic characteristics of these operations. The methods used, and the internal processes employed, to deliver concrete construction services are similar throughout the segment, including standardized estimating, project controls and project management. This segment complies with regulatory environments such as OSHA. Additionally, this segment is driven by macro-economic considerations, including movements in population, commercial real estate development, institutional funding and expansion, and recreational development, specifically in metropolitan areas of Texas. These considerations, and others, are key catalysts for future prospects and are similar across the segment.

Basis of Presentation

The accompanying consolidated financial statements and financial information included herein have been prepared pursuant to the interim period reporting requirements of Form 10-Q.  Consequently, certain information and note disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States ("U.S. GAAP") have been condensed or omitted.  Readers of this report should also read our consolidated financial statements and the notes thereto included in our Annual Report on Form 10-K for the fiscal year ended December 31, 2018 (“2018 Form 10-K”) as well as Item 7 – Management’s Discussion and Analysis of Financial Condition and Results of Operations also included in our 2018 Form 10-K.

In the opinion of management, the accompanying unaudited consolidated financial statements contain all adjustments considered necessary for a fair presentation of the Company’s financial position, results of operations, and cash flows for the periods presented.  Such adjustments are of a normal recurring nature.  Interim results of operations for the three months ended March 31, 2019 are not necessarily indicative of the results that may be expected for the year ending December 31, 2019.

8

2.    Summary of Significant Accounting Principles

The preparation of consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Management's estimates, judgments and assumptions are continually evaluated based on available information and experience; however, actual amounts could differ from those estimates. Please refer to Note 2 of the Notes to Consolidated Financial Statements included in our 2018 Form 10-K for a discussion of other significant estimates and assumptions affecting our consolidated financial statements which are not discussed below.

On an ongoing basis, the Company evaluates the significant accounting policies used to prepare its consolidated financial statements, including, but not limited to, those related to:

• Revenue recognition from construction contracts;

• Accounts receivable and allowance for doubtful accounts;

• Property, plant and equipment;

• Leases;

• Finite and indefinite-lived intangible assets, testing for indicators of impairment;

• Stock-based compensation;

• Income taxes; and

• Self-insurance

Revenue Recognition

The Company adopted ASU 2014-09, Revenue from Contracts with Customers (Topic 606), on January 1, 2018, using the modified retrospective method. The Company recognized the cumulative effect of initially adopting Topic 606 guidance as an adjustment to the beginning balance of retained earnings. Contracts with customers that were not substantially complete in both the Company’s marine and concrete segments were evaluated in order to determine the impact as of the date of adoption.

The Company’s revenue is derived from contracts to provide marine construction, dredging, turnkey concrete services, and other specialty services. The Company’s projects are typically short in duration and usually span a period of less than one year. The Company determines the appropriate accounting treatment for each contract before work begins and generally records revenue on contracts over time.

Performance obligations are promises in a contract to transfer distinct goods or services to the customer and are the unit of account under Topic 606. The Company's contracts and related change orders typically represent a single performance obligation because individual goods and services are not separately identifiable and the Company provides a significant integrated service. Revenue is recognized over time because control is continuously transferred to the customer. For contracts with multiple performance obligations, the Company allocates the contract's transaction price to each performance obligation using its best estimate of the stand-alone selling price of each distinct good or service. Progress is measured by the percentage of actual contract costs incurred to date to total estimated costs for each contract. This method is used because management considers contract costs incurred to be the best available measure of progress on these contracts. Contract costs include all direct costs, such as material and labor, and those indirect costs incurred that are related to contract performance such as payroll taxes and insurance. General and administrative costs are charged to expense as incurred. Upfront costs, such as costs to mobilize personnel and equipment prior to satisfying a performance obligation are capitalized and amortized over the contract performance period.

Changes in job performance, job conditions and estimated profitability, including those arising from final contract settlements, may result in revisions to costs and reported revenue and are recognized in the period in which the revisions are determined. The effect of changes in estimates of contract revenue or contract costs is recognized as an adjustment to recognized revenue on a cumulative catch-up basis. When losses on uncompleted contracts are anticipated, the entire loss is recognized in the period in which such losses are determined. Revenue is recorded net of any sales taxes collected and paid on behalf of the customer, if applicable.

Contract revenue is derived from the original contract price as modified by agreed-upon change orders and estimates of variable consideration related to incentive fees and change orders or claims for which price has not yet been agreed by the customer. The Company estimates variable consideration based on the most likely amount to which it expects to be entitled. Variable consideration is included in the estimated transaction price to the extent it is probable that a significant reversal of cumulative recognized revenue will not occur. As of March 31, 2019, approximately $1.1 million of claims against customers has been recognized and is reflected

9

on the Company's Consolidated Balance Sheet under "Costs and estimated earnings in excess of billings on uncompleted contracts." The Company believes collection of these claims is probable, although the full amount of the recorded claims may not be collected.

Contract assets and liabilities include the following:

• Accounts Receivable: Trade, net of allowance - Represent amounts billed and currently due from customers and are stated at their net estimated realizable value.

• Accounts Receivable: Retainage - Represent amounts which have not been billed to customers or paid pursuant to retainage provisions in construction contracts, which generally become payable upon contract completion and acceptance by the customer.

• Costs and Estimated Earnings in Excess of Billings on Uncompleted Contracts - Represent revenues recognized in excess of amounts billed, which management believes will be billed and collected within one year of the completion of the contract (i.e. Contract Assets) and are recorded as a current asset.

• Billings in Excess of Costs and Estimated Earnings on Uncompleted Contracts - Represent billings in excess of revenues recognized (i.e. Contract Liabilities) and are recorded as a current liability.

Remaining performance obligations represent the transaction price of firm orders or other written contractual commitments from customers for which work has not been performed, or is partially completed and excludes unexercised contract options and potential orders.As of March 31, 2019, the aggregate amount of the remaining performance obligations was approximately $411.5 million. Of this amount, the Company expects to recognize $396.4 million, or 96%, in the next 12 months and the remaining balance thereafter.

Classification of Current Assets and Liabilities

The Company includes in current assets and liabilities amounts realizable and payable in the normal course of contract completion.

Cash and Cash Equivalents

The Company considers all highly liquid investments with a maturity of three months or less when purchased to be cash equivalents.  At times, cash held by financial institutions may exceed federally insured limits.  The Company has not historically sustained losses on its cash balances in excess of federally insured limits.  Cash equivalents at March 31, 2019 and December 31, 2018 consisted primarily of overnight bank deposits.

Risk Concentrations

Financial instruments that potentially subject the Company to concentrations of credit risk principally consist of accounts receivable.

The Company depends on its ability to continue to obtain federal, state and local governmental contracts, and indirectly on the amount of funding available to these agencies for new and current governmental projects. Therefore, a portion of the Company’s operations is dependent upon the level and timing of government funding.  Statutory mechanics liens provide the Company high priority in the event of lien foreclosures following financial difficulties of private owners, thus minimizing credit risk with private customers.

Accounts Receivable

Accounts receivable are stated at the historical carrying value, less allowances for doubtful accounts. The Company has significant investments in billed and unbilled receivables as of March 31, 2019 and December 31, 2018. Billed receivables represent amounts billed upon the completion of small contracts and progress billings on large contracts in accordance with contract terms and milestone achievements. Unbilled receivables on contracts, which are included in costs in excess of billings, arise as revenues are recognized over time. Unbilled amounts on contracts represent recoverable costs and accrued profits not yet billed. Revenue associated with these billings is recorded net of any sales tax, if applicable. Past due balances over 90 days and other higher risk amounts are reviewed individually for collectability.  In establishing an allowance for doubtful accounts, the Company evaluates its contract receivables and costs in excess of billings and thoroughly reviews historical collection experience, the financial condition of its customers, billing disputes and other factors. The Company writes off potentially uncollectible accounts receivable against the allowance for doubtful accounts if it is determined that the amounts will not be collected or if a settlement is reached for an amount that is less than the carrying value. As of March 31, 2019 and December 31, 2018, the Company has recorded an allowance for doubtful accounts of $4.3 million.

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Balances billed to customers but not paid pursuant to retainage provisions in construction contracts generally become payable upon contract completion and acceptance by the owner.  Retainage at March 31, 2019 totaled $34.4 million, of which $4.8 million is expected to be collected beyond March 31, 2020. Retainage at December 31, 2018 totaled $30.7 million.

The Company negotiates change orders and claims with its customers. Unsuccessful negotiations of claims could result in a change to contract revenue that is less than amounts recorded, which could result in the recording of a loss. Successful claims negotiations could result in the recovery of previously recorded losses. Significant losses on receivables could adversely affect the Company’s financial position, results of operations and overall liquidity.

Advertising Costs

The Company primarily obtains contracts through an open bid process, and therefore advertising costs are not a significant component of expense.  Advertising costs are expensed as incurred.  

Environmental Costs

Costs related to environmental remediation are charged to expense. Other environmental costs are also charged to expense unless they increase the value of the property and/or provide future economic benefits, in which event the costs are capitalized. Environmental liabilities, if any, are recognized when the expenditure is considered probable and the amount can be reasonably estimated. The Company did not recognize any environmental liabilities as of March 31, 2019 and December 31, 2018.

Fair Value Measurements

The Company evaluates and presents certain amounts included in the accompanying consolidated financial statements at “fair value” in accordance with U.S. GAAP, which requires the Company to base its estimates on assumptions that market participants, in an orderly transaction, would use to price an asset or liability, and to establish a hierarchy that prioritizes the information used to determine fair value.  Refer to Note 8 for more information regarding fair value determination.

The Company generally applies fair value valuation techniques on a non-recurring basis associated with (1) valuing assets and liabilities acquired in connection with business combinations and other transactions; (2) valuing potential impairment loss related to long-lived assets; and (3) valuing potential impairment loss related to indefinite-lived intangible assets.

Inventory

Current inventory consists of parts and small equipment held for use in the ordinary course of business and is valued at the lower of cost (using historical average cost) or net realizable value. Where shipping and handling costs are incurred by the Company, these charges are included in inventory and charged to cost of contract revenue upon use. Non-current inventory consists of spare parts (including engines, cutters and gears) that require special order or long-lead times for manufacture or fabrication, but must be kept on hand to reduce downtime. Refer to Note 7 for more information regarding inventory.

Property and Equipment

Property and equipment are recorded at cost. Ordinary maintenance and repairs that do not improve or extend the useful life of the asset are expensed as incurred.  Major renewals and betterments of equipment are capitalized and depreciated generally over three to seven years until the next scheduled maintenance.

When property and equipment are retired or otherwise disposed of, the cost and accumulated depreciation are removed from the accounts and any resulting gain or loss is included in results of operations for the respective period.  Depreciation is computed using the straight-line method over the estimated useful lives of the related assets for financial statement purposes, as follows:

Automobiles and trucks	3 to 5 years
Buildings and improvements	5 to 30 years
Construction equipment	3 to 15 years
Vessels and other equipment	1 to 15 years
Office equipment	1 to 5 years

The Company generally uses accelerated depreciation methods for tax purposes where appropriate.

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Dry-docking costs are capitalized and amortized using the straight-line method over a period ranging from three to 15 years. Dry-docking costs include, but are not limited to, the inspection, refurbishment and replacement of steel, engine components, tailshafts, mooring equipment and other parts of the vessel.  Amortization related to dry-docking activities is included as a component of depreciation.  These costs and the related amortization periods are periodically reviewed to determine if the estimates are accurate.  If warranted, a significant upgrade of equipment may result in a revision to the useful life of the asset, in which case the change is accounted for prospectively.

Property and equipment are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset or asset group may not be recoverable. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of an asset to estimated undiscounted future cash flows expected to be generated by the asset. If the carrying amount of an asset exceeds its estimated future cash flows, an impairment charge is recognized in the amount by which the carrying amount of the asset exceeds the fair value of the asset. Assets to be disposed of are separately presented in the balance sheet and reported at the lower of the carrying amount or the fair value, less the costs to sell, and are no longer depreciated. There were no assets classified as held for sale as of March 31, 2019 and December 31, 2018.

Intangible Assets

Intangible assets that have finite lives are amortized.  In addition, the Company evaluates the remaining useful life of intangible assets in each reporting period to determine whether events and circumstances warrant a revision of the remaining period of amortization.  If the estimate of an intangible asset’s remaining life is changed, the remaining carrying value of such asset is amortized prospectively over that revised remaining useful life. Intangible assets that have indefinite lives are not amortized, but are subject to impairment testing at least annually or more frequently if events or circumstances indicate that the asset may be impaired.

The Company has one indefinite-lived intangible asset, a trade name, which is tested for impairment annually on October 31, or whenever events or circumstances indicate that the carrying amount of the trade name may not be recoverable. Impairment is calculated as the excess of the trade name's carrying value over its fair value. The fair value of the trade name is determined using the relief from royalty method, a variation of the income approach. This method assumes that if a company owns intellectual property, it does not have to "rent" the asset and is, therefore, "relieved" from paying a royalty. Once a supportable royalty rate is determined, the rate is then applied to the projected revenues over the expected remaining life of the intangible assets to estimate the royalty savings. This approach is dependent on a number of factors, including estimates of future growth and trends, royalty rates, discount rates and other variables.

See Note 9 for additional discussion of intangible assets and trade name impairment testing.

Stock-Based Compensation

The Company recognizes compensation expense for equity awards over the vesting period based on the fair value of these awards at the date of grant. The computed fair value of these awards is recognized as a non-cash cost over the period the employee provides services, which is typically the vesting period of the award. The fair value of options granted is estimated on the date of grant using the Black-Scholes option-pricing model. The Black-Scholes model requires the use of subjective assumptions in the computation. Changes in these assumptions can cause significant fluctuations in the fair value of the option award. The fair value of restricted stock grants is equivalent to the fair value of the stock issued on the date of grant, and is measured as the mean price of the stock on the day of grant.

Compensation expense is recognized only for share-based payments expected to vest. The Company estimates forfeitures at the date of grant based on historical experience and future expectations and this assessment is updated on a periodic basis. See Note 14 for further discussion of the Company’s stock-based compensation plan.

Income Taxes

The Company determines its consolidated income tax provision using the asset and liability method prescribed by U.S. GAAP,

which requires the recognition of income tax expense for the amount of taxes payable or refundable for the current period and for deferred tax liabilities and assets for the future tax consequences of events that have been recognized in an entity’s financial

statements or tax returns. The Company must make significant assumptions, judgments and estimates to determine its current

provision for income taxes, its deferred tax assets and liabilities, and any valuation allowance to be recorded against any deferred tax asset. The current provision for income tax is based upon the current tax laws and the Company’s interpretation of these laws, as well as the probable outcomes of any tax audits. The value of any net deferred tax asset depends upon estimates of the amount and category of future taxable income reduced by the amount of any tax benefits that the Company does not expect to realize.

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Actual operating results and the underlying amount and category of income in future years could render current assumptions, judgments and estimates of recoverable net deferred taxes inaccurate, thus impacting the Company’s financial position and results of operations. The Company computes deferred income taxes using the liability method. Under the liability method, deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. Under the liability method, the effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date.

The Company accounts for uncertain tax positions in accordance with the provisions of ASC 740-10 which prescribes a recognition threshold and measurement attribute for financial statement disclosure of tax positions taken, or expected to be taken, on its consolidated tax return.  The Company evaluates and records any uncertain tax positions based on the amount that management deems is more likely than not to be sustained upon examination and ultimate settlement with the tax authorities in the tax jurisdictions in which it operates.

Insurance Coverage

The Company maintains insurance coverage for its business and operations.  Insurance related to property, equipment, automobile, general liability, and a portion of workers' compensation is provided through traditional policies, subject to a deductible or deductibles.  A portion of the Company's workers’ compensation exposure is covered through a mutual association, which is subject to supplemental calls.

The marine segment maintains five levels of excess loss insurance coverage, totaling $200 million in excess of primary coverage. The marine segment's excess loss coverage responds to most of its policies when a primary limit of $1 million has been exhausted; provided that the primary limit for Contingent Maritime Employer’s Liability is $10 million and the Watercraft Pollution Policy primary limit is $5 million. The concrete segment maintains five levels of excess loss insurance coverage, totaling $200 million in excess of primary coverage. The concrete segment's excess loss coverage responds to most of its policies when a primary limit of $1 million has been exhausted.

If a claim arises and a potential insurance recovery is probable, the impending gain is recognized separately from the related loss. The recovery will only be recognized up to the amount of the loss once the recovery of the claim is deemed probable and any excess gain will fall under contingency accounting and will only be recognized once it is realized. The Company does not net insurance recoveries against the related claim liability as the amount of the claim liability is determined without consideration of the anticipated insurance recoveries from third parties.

Separately, the Company’s marine segment employee health care is paid for by general assets of the Company and currently administered by a third party. The administrator has purchased appropriate stop-loss coverage.  Losses on these policies up to the deductible amounts are accrued based upon known claims incurred and an estimate of claims incurred but not reported.  The accruals are derived from known facts, historical trends and industry averages to determine the best estimate of the ultimate expected loss. Actual claims may vary from estimates. Any adjustments to such reserves are included in the consolidated results of operations in the period in which they become known. The Company's concrete segment employee health care is provided through two policies.  A fully funded policy is offered primarily to salaried employees and their dependents while a partially self-funded plan with an appropriate stop-loss is offered primarily to hourly employees and their dependents. The self-funded plan is funded to the maximum exposure and, as a result, is expected to receive a partial refund after the policy expiration.

The accrued liability for insurance includes incurred but not reported claims of $4.0 million and $5.7 million at March 31, 2019 and December 31, 2018, respectively.

Accounting Standards Adopted in 2019

In February 2016, the Financial Accounting Standards Board ("FASB") issued an ASU 2016-02, Leases (Topic 842), , which requires all lessees to recognize right-of-use ("ROU") assets and lease liabilities, measured at the present value of the future minimum lease payments, at the lease commencement date. Lessor accounting remains largely unchanged under the new guidance. The standard also requires more detailed disclosures to enable users of financial statements to understand the nature, amount, timing, and uncertainty of cash flows arising from leases. The Company adopted the new standard on January 1, 2019, on a prospective basis, forgoing comparative reporting. The Company elected to utilize the transition guidance within the new standard, which allows the Company to carryforward the historical lease classification. The Company elected to not separate leases and non-lease components for all classes of underlying assets in which it is the lessee and made an accounting policy election to not account for leases with an initial term of 12 months or less on the balance sheet. Adoption of the standard resulting in the recording

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of additional net ROU operating lease assets of approximately $22.0 million and lease liabilities for operating leases of approximately $22.7 million on the Consolidated Balance Sheets as of March 31, 2019. The adoption of this guidance did not have an impact on net income. See Note 17 for more information regarding leases.

3.    Revenue

Revenues are recognized when control of the promised goods or services is transferred to the customer in an amount that reflects the consideration the Company expects to be entitled to in exchange for those goods or services. The following table represents a disaggregation of the Company’s contract revenue by service line for the marine and concrete segments:

	Three Months Ended March 31, 2019		Three Months Ended March 31, 2018
Marine Segment
Construction	$	33,636	$	42,375
Dredging	26,167		17,011
Specialty Services	1,684		3,405
Marine segment contract revenues	$	61,487	$	62,791
Concrete Segment
Structural	$	11,491	$	17,372
Light Commercial	70,096		56,493
Other	31		187
Concrete segment contract revenues	$	81,618	$	74,052
Total contract revenues	$	143,105	$	136,843

Although the Company has disaggregated its contract revenues here in terms of services provided, it believes its operations comprise two reportable segments pursuant to FASB ASC Topic 280, Segment Reporting. In making this determination, the Company considered the similar characteristics of its operations as discussed in Note 1. Additionally, as discussed, both the marine and concrete segments have limited contracts with multiple performance obligations.  The Company’s contracts often combine multiple services, such as engineering, dredging, diving and construction, into one distinct finished product which is transferred to the customer.  These contracts are often estimated and bid as one project and evaluated on performance as one project, not by individual services performed by each.  Both the marine and concrete segments have a single chief operating decision maker (“CODM”) for the entire segment, not by service lines of the segments.  Resources are allocated by segment and financial and budgetary information is compiled and reviewed by segment, not service line. 

Marine Segment

Construction services include construction, restoration, maintenance, dredging and repair of marine transportation facilities, marine pipelines, bridges and causeways and marine environmental structures. Dredging services generally enhance or preserve the navigability of waterways or the protection of shorelines through the removal or replenishment of soil, sand or rock. Specialty services include design, salvage, demolition, surveying, towing, diving and underwater inspection, excavation and repair.

Concrete Segment

Structural services include elevated concrete pouring for products such as columns, elevated beams and structural walls. Light commercial services include horizontally poured concrete for products such as sidewalks, ramps, tilt walls and trenches. Other services comprise labor related to concrete pouring such as rebar installation and pumping services and typically support our structural and light commercial services.

4.    Concentration of Risk and Enterprise Wide Disclosures

Accounts receivable include amounts billed to governmental agencies and private customers and do not bear interest. Balances billed to customers but not paid pursuant to retainage provisions generally become payable upon contract completion and acceptance by the owner.

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The table below presents the concentrations of current receivables (trade and retainage) at March 31, 2019 and December 31, 2018, respectively:

	March 31, 2019				December 31, 2018
Federal Government	$	3,533	3	%	$	2,319	2	%
State Governments	509		—	%	916		1	%
Local Governments	39,053		33	%	30,187		28	%
Private Companies	75,769		64	%	74,953		69	%
Total receivables	$	118,864	100	%	$	108,375	100	%

At March 31, 2019 one customer in the local governments category accounted for 12% of total current receivables. At December 31, 2018, no single customer accounted for more than 10% of total current receivables.

Additionally, the table below represents concentrations of contract revenue by type of customer for the three months ended March 31, 2019 and 2018, respectively:

	Three months ended March 31,
	2019		%		2018		%
Federal Government	$	10,277	7	%	$	13,023	10	%
State Governments	4,055		3	%	8,376		6	%
Local Government	44,430		31	%	23,230		17	%
Private Companies	84,343		59	%	92,214		67	%
Total contract revenues	$	143,105	100	%	$	136,843	100	%

In the three months ended March 31, 2019 and 2018, no single customer generated more than 10% of total contract revenues.

The Company does not believe that the loss of any one of its customers would have a material adverse effect on the Company or its subsidiaries and affiliates since no single specific customer sustains such a large portion of receivables or contract revenue over time.

In addition, the concrete segment primarily purchases concrete from select suppliers. The loss of one of these suppliers could adversely impact short-term operations.

5.     Contracts in Progress

Contracts in progress are as follows at March 31, 2019 and December 31, 2018:

	March 31, 2019			December 31, 2018
Costs incurred on uncompleted contracts	$	601,578		$	461,144
Estimated earnings	63,065			73,170
	664,643			534,314
Less: Billings to date	(685,375		)	(546,858		)
	$	(20,732	)	$	(12,544	)
Included in the accompanying Consolidated Balance Sheet under the following captions:
Costs and estimated earnings in excess of billings on uncompleted contracts	$	15,133		$	9,217
Billings in excess of costs and estimated earnings on uncompleted contracts	(35,865		)	(21,761		)
	$	(20,732	)	$	(12,544	)

As of March 31, 2019 and December 31, 2018, included in cost and estimated earnings in excess of billings on uncompleted projects is approximately $1.1 million related to claims and unapproved change orders.

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6.    Property and Equipment

The following is a summary of property and equipment at March 31, 2019 and December 31, 2018:

	March 31, 2019			December 31, 2018
Automobiles and trucks	$	1,668		$	1,709
Building and improvements	43,628			43,628
Construction equipment	156,015			161,113
Vessels and other equipment	81,772			90,217
Office equipment	8,114			8,061
	291,197			304,728
Less: Accumulated depreciation	(194,225		)	(195,373		)
Net book value of depreciable assets	96,972			109,355
Construction in progress	4,006			2,785
Land	35,863			35,863
	$	136,841		$	148,003

For the three months ended March 31, 2019 and 2018, depreciation expense was $5.8 million and $5.9 million, respectively. Substantially all depreciation expense is included in the cost of contract revenue in the Company’s Consolidated Statements of Operations.  

Substantially all of the Company’s long-lived assets are located in the United States.

Substantially all of the assets of the Company are pledged as collateral under the Company's Credit Agreement (as defined in Note 11).

See Note 2 to the Company's consolidated financial statements for further discussion of property and equipment.

7.    Inventory

Current inventory at March 31, 2019 and December 31, 2018, of $0.9 million and $1.1 million, respectively, consisted primarily of spare parts and small equipment held for use in the ordinary course of business.

Non-current inventory at March 31, 2019 and December 31, 2018 of $7.5 million and $7.6 million, respectively, consisted primarily of spare engine components or items which require longer lead times for sourcing or fabrication for certain of the Company's assets to reduce equipment downtime.

8.    Fair Value

Recurring Fair Value Measurements

The fair value of financial instruments is the amount at which the instrument could be exchanged in a current transaction between willing parties.  Due to their short-term nature, the Company believes that the carrying value of its accounts receivable, other current assets, accounts payable and other current liabilities approximate their fair values.

The Company classifies financial assets and liabilities into the following three levels based on the inputs used to measure fair value in the order of priority indicated:

• Level 1- fair values are based on observable inputs such as quoted prices in active markets for identical assets or liabilities;

• Level 2 - fair values are based on pricing inputs other than quoted prices in active markets for identical assets and liabilities and are either directly or indirectly observable as of the measurement date; and

• Level 3- fair values are based on unobservable inputs in which little or no market data exists.

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Financial assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement. The Company's assessment of the significance of a particular input to the fair value requires judgment and may affect the placement of assets and liabilities within the fair value hierarchy levels.

The following table sets forth by level within the fair value hierarchy the Company's recurring financial assets and liabilities that were accounted for at fair value on a recurring basis as of March 31, 2019 and December 31, 2018:

			Fair Value Measurements
	Carrying Value		Level 1	Level 2	Level 3
March 31, 2019
Assets:
Cash surrender value of life insurance policy	$	2,295	—	2,295	—
Liabilities:
Derivatives	$	442	—	442	—
December 31, 2018
Assets:
Cash surrender value of life insurance policy	$	1,993	—	1,993	—
Liabilities:
Derivatives	$	79	—	79	—

The Company's derivatives, which are comprised of interest rate swaps, are valued using a discounted cash flow analysis that incorporates observable market parameters, such as interest rate yield curves and credit risk adjustments that are necessary to reflect the probability of default by us or the counterparty. These derivatives are classified as a Level 2 measurement within the fair value hierarchy. See Note 11 for additional information on the Company's derivative instrument.

Our concrete segment has life insurance policies covering employees with a combined face value of $11.1 million. The policies are invested in mutual funds and the fair value measurement of the cash surrender balance associated with these policies is determined using Level 2 inputs within the fair value hierarchy and will vary with investment performance. These assets are included in the "Other non-current" asset section in the Consolidated Balance Sheets.

Non-Recurring Fair Value Measurements

The Company generally applies fair value valuation techniques on a non-recurring basis associated with (1) valuing assets and liabilities acquired in connection with business combinations and other transactions; (2) valuing potential impairment loss related to long-lived assets; and (3) valuing potential impairment loss related to the indefinite-lived intangible asset.

Other Fair Value Measurements

The fair value of the Company's debt at March 31, 2019 and December 31, 2018 approximated its carrying value of $80.8 million and $80.5 million, respectively, as interest is based on current market interest rates for debt with similar risk and maturity. If the Company's debt was measured at fair value, it would have been classified as a Level 2 measurement in the fair value hierarchy.

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9.    Goodwill and Intangible Assets

Goodwill

The table below summarizes changes in goodwill recorded by the Company during the periods ended March 31, 2019 and December 31, 2018, respectively:

	March 31, 2019		December 31, 2018
Beginning balance, January 1	$	—	$	69,483
Impairments	—		(69,483		)
Ending balance	$	—	$	—

In the fourth quarter of 2018, the Company's annual goodwill impairment test indicated that its goodwill was fully impaired, primarily due to a decline in market capitalization and as a result it incurred a goodwill impairment charge of $69.5 million with $33.8 million related to the Marine segment and $35.7 million related to the Concrete segment.

Intangible assets

The tables below present the activity and amortization of finite-lived intangible assets:

	March 31, 2019			December 31, 2018
Intangible assets, January 1	$	35,240		$	35,240
Additions	—			—
Total intangible assets, end of period	35,240			35,240
Accumulated amortization, January 1	$	(27,345	)	$	(23,956	)
Current year amortization	(658		)	(3,389		)
Total accumulated amortization	(28,003		)	(27,345		)
Net intangible assets, end of period	$	7,237		$	7,895

Finite-lived intangible assets were acquired as part of the purchase of TBC, which included contractual backlog and customer relationships. Contractual backlog was valued at approximately $0.1 million and was amortized over seven months in 2017. Customer relationships were valued at approximately $0.7 million and will be amortized over seven years. Both of these assets will be amortized using an accelerated method based on the pattern in which the economic benefits of the assets are consumed. For the three months ended March 31, 2019, $0.7 million of amortization expense was recognized for these assets. Future expense remaining of approximately $7.2 million will be amortized as follows:

2019	1,982
2020	2,069
2021	1,521
2022	1,239
2023	389
Thereafter	37
	$	7,237

Additionally, the Company has one indefinite-lived intangible asset, as described in Note 2. At March 31, 2019 the trade name was valued at approximately $6.9 million and no indicators of impairment existed.

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10.    Accrued Liabilities

Accrued liabilities at March 31, 2019 and December 31, 2018 consisted of the following:

	March 31, 2019		December 31, 2018
Accrued salaries, wages and benefits	$	6,010	$	6,492
Accrual for insurance liabilities	4,034		5,680
Property taxes	871		924
Capital lease liability (1)	—		3,045
Sales taxes	1,876		2,178
Other accrued expenses	840		521
Total accrued liabilities	$	13,631	$	18,840

(1) December 31, 2018 balance relates to capital leases accounting for under ASC 840 and prior to the adoption of ASC 842 as of January 1, 2019.

11.    Long-term Debt, Line of Credit and Derivatives

The Company entered into an amended syndicated credit agreement (the "Credit Agreement" also known as the “Fourth Amendment”) on July 31, 2018 with Regions Bank, as administrative agent and collateral agent, and the following co-syndication agents: Bank of America, N.A., BOKF, NA dba Bank of Texas, KeyBank National Association, NBH Bank, IBERIABANK, Trustmark National Bank, First Tennessee Bank NA, and Branch Banking and Trust Company.

The Credit Agreement, which may be amended from time to time, provides for borrowings under a revolving line of credit and swingline loans with a commitment amount of $100.0 million and a term loan with a commitment amount of $60.0 million (together, the “Credit Facility”). The Credit Facility is guaranteed by the subsidiaries of the Company, secured by the assets of the Company, including stock held in its subsidiaries, and may be used to finance general corporate and working capital purposes, to finance capital expenditures, to refinance existing indebtedness, to finance permitted acquisitions and associated fees, and to pay for all related expenses to the Credit Facility. Interest is due and is computed based on the designation of the loan, with the option of a Base Rate Loan (the base rate plus the Applicable Margin), or an Adjusted LIBOR Rate Loan (the adjusted LIBOR rate plus the Applicable Margin).  Interest is due on the last day of each quarter end for Base Rate Loans and at the end of the LIBOR rate period for Adjusted LIBOR Rate Loans. Principal balances drawn under the Credit Facility may be prepaid at any time, in whole or in part, without premium or penalty.  Amounts repaid under the revolving line of credit may be re-borrowed. The Credit Facility matures on July 31, 2023.

Total debt issuance costs for the Fourth Amendment, which included underwriter fees, legal fees and syndication fees were approximately $0.9 million and have been capitalized as non-current deferred charges and amortized using the effective interest rate method over the duration of the loan. During the fourth quarter of 2018, the Company executed the Fifth Amendment and additional costs were incurred of approximately $0.7 million.

The quarterly weighted average interest rate for the Credit Facility as of March 31, 2019 was 4.92%.

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The Company's obligations under debt arrangements consisted of the following:

	March 31, 2019							December 31, 2018
	Principal		Debt Issuance Costs(1)			Total		Principal		Debt Issuance Costs(1)			Total
Term loan - current	$	3,000	$	(50	)	$	2,950	$	3,000	$	(54	)	$	2,946
Total current debt	3,000		(50		)	2,950		3,000		(54		)	2,946
Revolving line of credit	23,000		(372		)	22,628		22,000		(213		)	21,787
Term loan - long-term	54,750		(886		)	53,864		55,500		(1,168		)	54,332
Total long-term debt	77,750		(1,258		)	76,492		77,500		(1,381		)	76,119
Total debt	$	80,750	$	(1,308	)	$	79,442	$	80,500	$	(1,435	)	$	79,065

(1) Total debt issuance costs, include underwriter fees, legal fees and syndication fees and fees related to the execution of the Fourth and Fifth Amendments to the Credit Agreement.

Provisions of the revolving line of credit and accordion

The Company has a maximum borrowing availability under the revolving line of credit and swingline loans (as defined in the Credit Agreement) of $100.0 million. With the execution of the Fifth Amendment, the maximum borrowing availability under the revolving line of credit as of December 31, 2018, was temporarily reduced to $65.0 million and will remain in effect until certain conditions have been met. The letter of credit sublimit is equal to the lesser of $20.0 million and the aggregate unused amount of the revolving commitments then in effect. The swingline sublimit is equal to the lesser of $5.0 million and the aggregate unused amount of the revolving commitments then in effect.

Revolving loans may be designated as Base Rate Loan or Adjusted LIBOR Rate Loans, at the Company’s request, and must be made in an aggregate minimum amount of $1.0 million and integral multiples of $250,000 in excess of that amount.  Swingline loans must be made in an aggregate minimum amount of $250,000 and integral multiples of $50,000 in excess of that amount. The Company may convert, change, or modify such designations from time to time.

The Company is subject to a commitment fee for the unused portion of the maximum available to borrow under the revolving line of credit. The commitment fee, which is due quarterly in arrears, is equal to the Applicable Margin of the actual daily amount by which the Aggregate Revolving Commitments exceeds the Total Revolving Outstanding. The revolving line of credit termination date is the earlier of the Credit Facility termination date, July 31, 2023, or the date the outstanding balance is permanently reduced to zero.

The maturity date for amounts drawn under the revolving line of credit is the earlier of the Facility termination date of July 31, 2023, or the date the outstanding balance is permanently reduced to zero. Prior to the fourth quarter of 2018, the Company classified amounts drawn as current liabilities based on an intent and ability to repay the amounts using current assets within the next twelve months. During the fourth quarter of 2018, the Company determined it no longer has the intent to repay amounts drawn within the next twelve months. Therefore, the Company has classified the entire outstanding balance of the revolving line of credit as non-current.

As of March 31, 2019, the outstanding balance for all borrowings under the revolving line of credit was $23.0 million and was designated as an Adjusted LIBOR Rate Loan at a rate of 5.25%. There were also $0.8 million in outstanding letters of credit as of March 31, 2019, which reduced the maximum borrowing availability on the revolving line of credit to $41.2 million as of March 31, 2019. During the three months ended March 31, 2019 , the Company drew down $11.0 million and made payments of $10.0 million on the revolving line of credit.

Provisions of the term loan

The original principal amount of $60.0 million for the term loan commitment is paid off in quarterly installment payments (as stated in the Credit Agreement). At March 31, 2019, the outstanding term loan component of the Credit Facility totaled $57.8 million and was secured by specific assets of the Company.

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The table below outlines the total remaining payment amounts annually for the term loan through maturity of the Credit Facility:

2019	2,250
2020	3,750
2021	4,500
2022	5,250
2023	42,000
	$	57,750

During the three months ended March 31, 2019, the Company made the scheduled quarterly principal payment of $0.8 million, which reduced the outstanding principal balance to $57.8 million as of March 31, 2019. The current portion of debt is $3.0 million and the non-current portion is $54.8 million. As of March 31, 2019, the term loan was designated as an Adjusted LIBOR Rate Loan with an interest rate of 5.25%.

Financial covenants

Restrictive financial covenants under the Credit Facility include:

• A consolidated Fixed Charge Coverage Ratio as of the end of any fiscal quarter to not be less than 1.25 to 1.00.

• A consolidated Leverage Ratio to not exceed the following during each noted period:

-Fiscal Quarter Ending December 31, 2018, to not exceed 3.00 to 1.00;

-Fiscal Quarter Ending March 31, 2019, to not exceed 4.75 to 1.00;

-Fiscal Quarter Ending June 30, 2019, to not exceed 4.75 to 1.00;

-Fiscal Quarter Ending September 30, 2019 and each Fiscal Quarter thereafter, to not exceed 3.00 to 1.00.

During the first quarter of 2019, the Company initiated discussions with the lead bank due to concerns that it would not be in compliance with financial covenants and executed the Sixth Amendment during May 2019. With the execution of the aforementioned amendment, the Company obtained a waiver on the financial covenants as of March 31, 2019.

In addition, the Credit Facility contains events of default that are usual and customary for similar arrangements, including non-payment of principal, interest or fees; breaches of representations and warranties that are not timely cured; violation of covenants; bankruptcy and insolvency events; and events constituting a change of control.

The Company expects to meet its future internal liquidity and working capital needs, and maintain or replace its equipment fleet through capital expenditure purchases and major repairs, from funds generated by its operating activities for at least the next 12

months. The Company believes that its cash position and available borrowings together with cash flow from its operations is

adequate for general business requirements and to service its debt.

Derivative Financial Instruments

On September 16, 2015, the Company entered into a series of receive-variable, pay-fixed interest rate swaps to hedge the variability in the interest payments on 50% of the aggregate principal amount of the Regions Term Loan outstanding, beginning with a notional amount of $67.5 million. There are a total of five sequential interest rate swaps to achieve the hedged position and each year on August 31, with the exception of the final swap, the existing interest rate swap is scheduled to expire and will be immediately replaced with a new interest rate swap until the expiration of the final swap on July 31, 2023. On December 6, 2018, the Company entered into a sixth receive-variable, pay-fixed interest rate swaps to hedge the variability of interest payments. The sixth swap will begin with a notional amount of $27.0 million on July 31, 2020 will hedge the variability in the interest payments on 50% of the aggregate scheduled principal amount of the Regions Term Loan outstanding. The sixth swap is scheduled to expire on July 31, 2023. At inception, these interest rate swaps were designated as a cash flow hedge for hedge accounting, and as such, the effective portion of unrealized changes in market value are recorded in accumulated other comprehensive (loss) income and reclassified into earnings during the period in which the hedged forecasted transaction affects earnings. Gains and losses from hedge ineffectiveness are recognized in current earnings. The change in fair market value of the swaps as of March 31, 2019 is $0.3 million, which is reflected in the balance sheet as a liability in Other non-current liabilites on the Consolidated Balance Sheets. The fair market value of the swaps as of March 31, 2019 is $(0.4) million. See Note 8 for more information regarding the fair value of the Company's derivative instruments.

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12.    Income Taxes

The Company's effective tax rate is based on expected income, statutory rates and tax planning opportunities available to it. For interim financial reporting, the Company estimates its annual tax rate based on projected taxable (loss) income for the full year and records a quarterly tax provision in accordance with the anticipated annual rate. Income tax expense included in the Company’s accompanying Consolidated Statements of Operations was as follows (in thousands, except percentages):

	Three months ended March 31,
	2019			2018
Income tax expense	$	593		$	1,489
Effective tax rate	(8.1		)%	26.6		%

The effective rate for the three months ended March 31, 2019 differed from the Company's statutory federal rate of 21% primarily due to to the recording of an additional valuation allowance to offset net operating loss carryforwards generated during the period, state income taxes and the non-deductibility of certain permanent items.

During the year ended December 31, 2018 the Company assessed the realizability of its deferred tax assets and determined that it was not more likely than not that some portion or all the deferred tax assets would not be realized and therefore recorded a valuation allowance on the net deferred tax assets. The Company assesses the available positive and negative evidence to estimate if sufficient future taxable income will be generated to use the existing deferred tax assets. The Company considers the scheduled reversal of deferred tax liabilities, available carryback periods, and tax-planning strategies in making this assessment. For the period ended March 31, 2019 the Company evaluated all positive and negative evidence in determining the amount of deferred tax assets more likely than not to be realized. Based on the review of available evidence, Management believes that a valuation allowance on the net deferred tax assets at March 31, 2019 remains appropriate.

The Company does not expect that unrecognized tax benefits as of March 31, 2019 for certain federal income tax matters will significantly change due to any settlement and/or expiration of statutes of limitations over the next 12 months. The final outcome of these uncertain tax positions is not yet determinable. The Company's uncertain tax benefits, if recognized, would affect the Company's effective tax rate.

13.     (Loss) Earnings Per Share

Basic (loss) earnings per share is based on the weighted average number of common shares outstanding during each period. Diluted (loss) earnings per share is based on the weighted average number of common shares outstanding as well as the effect of all dilutive common stock equivalents during each period net income is generated. The exercise price for certain stock options awarded by the Company exceeds the average market price of the Company's common stock. Such stock options are antidilutive and are not included in the computation of (loss) earnings per share. For the three month periods ended March 31, 2019 and March 31, 2018, the Company had 1,748,489 and 1,926,288 securities, respectively, that were potentially dilutive in future earnings per share calculations. Such dilution will be dependent on the excess of the market price of our stock over the exercise price and other components of the treasury stock method.

The following table reconciles the denominators used in the computations of both basic and diluted earnings (loss) per share:

	Three months ended March 31,
	2019	2018
Basic:
Weighted average shares outstanding	28,927,406	28,143,791
Diluted:
Total basic weighted average shares outstanding	28,927,406	28,143,791
Effect of dilutive securities:
Common stock options	—	225,971
Total weighted average shares outstanding assuming dilution	28,927,406	28,369,762
Shares of common stock issued from the exercise of stock options	7,021	146,765

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14.    Stock-Based Compensation

The Compensation Committee of the Company's Board of Directors is responsible for the administration of the Company's stock incentive plans, which include the 2017 Long Term Incentive Plan, or the "2017 LTIP", which was approved by shareholders in May 2017 and authorized the maximum aggregate number of shares of common stock to be issued at 2,400,000. In general, the Company's 2017 LTIP provides for grants of restricted stock and stock options to be issued with a per-share price equal to the fair market value of a share of common stock on the date of grant.  Option terms are specified at each grant date, but are generally 10 years from the date of issuance.  Options generally vest over a three year period.  

The Company awards certain executives shares of performance based stock options, with 100% of shares to be earned based on the achievement of an objective return on invested capital measured over a two-year performance period. The Company evaluates the probability of achieving this each reporting period.

The Company applies a 3.2% and a 5.5% forfeiture rate, which gets compounded over the vesting terms of the individual award, to its restricted stock and option grants, respectively, based on historical analysis.

In the three months ended March 31, 2019 and 2018, compensation expense related to stock based awards outstanding was $0.7 million and $0.3 million, respectively.

In January 2019, certain independent directors were awarded a total of 16,854 shares of restricted common stock, which vested immediately on the date of grant. The fair value of all shares awarded on the date of the grant was $4.45 per share.

In March 2019, the Company granted an executive of the Company 168,350 shares of restricted common stock, which vests 1/3 at March 31, June 30, and September 30, 2019, respectively. The fair value of all shares awarded on the date of the grant was $2.97 per share.

In the three months ended March 31, 2019, 7,021 options were exercised, generating proceeds to the Company of less than $0.1 million. In the three months ended March 31, 2018, 146,765 options were exercised, generating proceeds to the Company of approximately $0.8 million.

At March 31, 2019, total unrecognized compensation expense related to unvested stock and options was approximately $3.2 million, which is expected to be recognized over a period of approximately two years.

15.    Commitments and Contingencies

The Company and one former and two current officers are named defendants in a class action lawsuit filed on April 11, 2019 in the United States District Court for the Southern District of Texas, Houston Division, seeking unstated compensatory damages under the federal securities laws allegedly arising from materially false and misleading statements during the period of March 13, 2018 to March 18, 2019. The complaint asserts, among other things, that the current and former officers caused the Company to overstate goodwill in certain periods; overstate accounts receivables; that the company lacked effective internal controls over financial reporting related to goodwill impairment testing and accounts receivables; and that as a result the required adjustments to goodwill and accounts receivables materially impacted the company’s financial statements causing the company’s stock price to be artificially inflated during the class period.  The Company will respond to the complaint, considers all of these allegations without merit and will vigorously contest the allegations. 

In addition, from time to time, the Company is a party to various lawsuits, claims and other legal proceedings that arise in the ordinary course of business. These actions typically seek, among other things, compensation for alleged personal injury, breach of contract, property damage, punitive damages, civil penalties or other losses, or injunctive or declaratory relief. With respect to such lawsuits, the Company accrues reserves when it is probable a liability has been incurred and the amount of loss can be reasonably estimated. The Company does not believe any of these or any other proceedings, individually or in the aggregate, would be expected to have a material adverse effect on results of operations, cash flows, or financial condition

A legal matter was settled for $5.5 million during the first quarter of 2018.  Settlement amounts were recorded in Other gain from continuing operations in the Consolidated Statement of Operations, Prepaid expenses and other (current portion of the notes receivable) and Other non-current assets (non-current portion of the notes receivable) in the Consolidated Balance Sheets.  As of March 31, 2019, the current portion of the notes receivable was $0.8 million and the non-current portion was $2.9 million, net of $0.4 million of unamortized discount.  Legal fees related to this matter were expensed as incurred during the respective reporting period. 

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As a result of charges brought in September 2015 and October 2016 by the Houston Police Department, Environmental Enforcement, two subsidiaries of the Company were indicted at the request of the Harris County, Texas District Attorney’s Office by a duly organized Grand Jury of Harris County, Texas for separate but related violations of the Texas Water Code, allegedly arising from the handling of construction concrete at certain work sites. Specifically, both were charged with unlawfully, intentionally or knowingly discharging a waste or pollutant. The Company is subject to a maximum fine in each case of $250,000, but has already declined a $75,000 and subsequently a $15,000 plea bargain in the first case. In the second case, a project supervisor was also indicted. None of these allegations nor the costs of defense, taken separately or as a whole, is expected to have a material impact on the Company’s balance sheet or its liquidity. The Company considers all of these allegations without merit and it will vigorously defend itself and its employee.

16.    Segment Information

The Company currently operates in two reportable segments: marine and concrete. The Company's financial reporting systems present various data for management to run the business, including profit and loss statements prepared according to the segments presented. The Company uses operating income to evaluate performance between the two segments. Segment information for the periods presented is provided as follows:

	Three months ended March 31, 2019			Three months ended March 31, 2018
Marine
Contract revenues	$	61,487		$	62,791
Operating (loss) income	(6,456		)	6,265
Depreciation and amortization expense	(4,946		)	(4,731		)
Total assets	$	213,162		$	255,484
Property, plant and equipment, net	118,596			127,078
Concrete
Contract revenues	$	81,618		$	74,052
Operating income	279			804
Depreciation and amortization expense	(2,094		)	(2,049		)
Total assets	$	127,220		$	166,949
Property, plant and equipment, net	18,245			17,790

Intersegment revenues between the Company's two reportable segments for the three months ended March 31, 2019 and March 31, 2018 was less than $0.1 million, respectively. The marine segment had foreign revenues of approximately $0.5 million and $6.0 million for the three months ended March 31, 2019 and 2018, respectively. These revenues are derived from projects in the Caribbean Basin and are paid in U.S. dollars. There was no foreign revenue for the concrete segment.

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17.    Leases

The Company has operating and finance leases for office space, equipment and vehicles.

Management determines if a contract is or contains a lease at inception of the contract or modification of the contract. A contract is or contains a lease if the contract conveys the right to control the use of an identified asset for a period in exchange for consideration. Control over the use of the identified asset means the lessee has both (a) the right to obtain substantially all of the economic benefits from the use of the asset and (b) the right to direct the use of the asset.

Finance and operating lease ROU assets and liabilities are recognized based on the present value of future minimum lease payments over the expected lease term at a commencement date. As the implicit rate is not determinable in most of the Company's leases, management uses the Company's incremental borrowing rate based on the information available at commencement date in determining the present value of future payments. The expected lease term includes options to extend or terminate the lease when it is reasonably certain the Company will exercise such option. Lease expense for minimum lease payments is recognized on a straight-line basis over the expected lease term.

The Company's lease arrangements have lease and non-lease components. Leases with an expected term of 12 months or less are not accounted for on the balance sheet and the related lease expense is recognized on a straight-line basis over the expected lease term.

The Company's lease agreements do not contain any material residual value guarantees or material restrictive covenants.

Leases recorded on the balance sheet consists of the following:

	March 31,
Leases	2019
Assets
Operating lease right-of-use assets, net (1)	$	22,002
Financing lease right-of-use assets, net (2)	8,618
Total assets	$	30,620
Liabilities
Current
Operating	$	5,595
Financing	2,875
Total current	8,470
Noncurrent
Operating	17,109
Financing	4,862
Total noncurrent	21,971
Total liabilities	$	30,441

(1) Operating lease right-of-use assets are recorded net of accumulated amortization of $1.4 million as of March 31, 2019.

(2) Financing lease right-of-use assets are recorded net of accumulated amortization of $4.5 million as of March 31, 2019

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Other information related to lease term and discount rate is as follows:

	March 31,
	2019
Weighted Average Remaining Lease Term
Operating leases	5.59 years
Financing leases	1.74 years
Weighted Average Discount Rate
Operating leases (1)	4.76	%
Financing leases	5.44	%

(1) Upon adoption of the new lease standard, discount rates used for existing operating leases were established on January 1, 2019.

The components of lease expense are as follows:

	Three Months Ended
	March 31, 2019
Operating lease costs:
Operating lease cost	$	1,701
Short-term lease cost (1)	68
Financing lease costs:
Interest on lease liabilities	103
Amortization of right-of-use assets	569
Total lease cost	$	2.441

(1) Excludes expenses related to leases with a lease term of one month or less.

Supplemental cash flow information related to leases is as follows:

	Three Months Ended
	March 31, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows for operating leases	$	1,674
Operating cash flows for finance leases	$	103
Financing cash flows for finance leases	$	696
Non-cash activity:
ROU assets obtained in exchange for new operating lease liabilities	$	23,431
ROU assets obtained in exchange for new financing  lease liabilities	$	—

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Maturities of lease liabilities are summarized as follows

	Operating Leases		Finance Leases
Year ending December 31,
2019 (excluding the three months ended March 31, 2019)	$	5,022	$	2,783
2020	5,614		2,876
2021	4,298		2,521
2022	2,823		—
2023	2,268		—
Thereafter	6,011		—
Total future minimum lease payments	26,036		8,180
Less - amount representing interest	3,332		443
Present value of future minimum lease payments	22,704		7,737
Less - current lease obligations	5,595		2,875
Long-term lease obligations	$	17,109	$	4,862

18.    Subsequent Event

During the first quarter of 2019, the Company initiated discussions with the lead bank due to concerns that it would not be in compliance with financial covenants and executed the Sixth Amendment during May 2019. With the execution of the aforementioned amendment, the Company obtained a waiver on the financial covenants as of March 31, 2019.

As of the execution date, the amendment will also increase the leverage ratio requirements to 9.50, 6.25, and 4.00 times for the second, third, and fourth quarters of 2019, respectively and provide a covenant waiver on the fixed charge coverage ratio for the second and third quarters of 2019.  The fixed charge coverage ratio requirement will revert back to 1.25 times in the fourth quarter of 2019. The leverage ratio requirement will revert back to 3.00 times in the first quarter of 2020. Additionally, as of the execution date, the amendment will reduce the commitment on the revolving line of credit to $50 million and will include a contingency for an additional $5.0 million reduction if certain circumstances have not been met by May 31, 2019.  With the execution of the Sixth Amendment, the existing Credit Facility will be treated as an extinguishment of debt and accounted for under the guidelines of ASC 470-05, Debt, Modifications and Extinguishments, and all unamortized debt issuance costs of approximately $1.3 million will be recognized as interest expense as of May 2019. The new debt issuance costs of approximately $0.7 million related to the execution of the Sixth Amendment will be amortized through the maturity date.

MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

CAUTIONARY STATEMENT CONCERNING FORWARD-LOOKING STATEMENTS

Unless the context otherwise indicates, all references in this quarterly report to “Orion,” “the Company,” “we,” “our,” or “us” are to Orion Group Holdings, Inc. and its subsidiaries taken as a whole.

Certain information in this Quarterly Report on Form 10-Q, including but not limited to Management’s Discussion and Analysis of Financial Condition and Results of Operations (“MD&A”), may constitute forward-looking statements as such term is defined within the meaning of the “safe harbor” provisions of Section 27A of the Securities Exchange Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended.

All statements other than statements of historical facts, including those that express a belief, expectation, or intention are forward-looking statements. The forward-looking statements may include projections and estimates concerning the timing and success of specific projects and our future production, revenues, income and capital spending. Our forward-looking statements are generally accompanied by words such as “estimate,” “project,” “predict,” “believe,” “expect,” “anticipate,” “potential,” “plan,” “goal” or other words that convey the uncertainty of future events or outcomes.

We have based these forward-looking statements on our current expectations and assumptions about future events. While our management considers these expectations and assumptions to be reasonable, they are inherently subject to significant business, economic, competitive, regulatory and other risks, contingencies and uncertainties, most of which are difficult to predict and many of which are beyond our control, including unforeseen productivity delays and other difficulties encountered in project execution, levels of government funding or other governmental budgetary constraints, and contract cancellation at the discretion of the customer. These and other important factors, including those described under “Risk Factors” in Item 1A of the Company’s Annual

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Report on Form 10-K for the year ended December 31, 2018 (“2018 Form 10-K”) may cause our actual results, performance or achievements to differ materially from any future results, performance or achievements expressed or implied by these forward-looking statements.  The forward-looking statements in this quarterly report on Form 10-Q speak only as of the date of this report; we disclaim any obligation to update these statements unless required by securities law, and we caution you not to rely on them unduly.

MD&A provides a narrative analysis explaining the reasons for material changes in the Company’s (i) financial condition since the most recent fiscal year-end, and (ii) results of operations during the current fiscal year-to-date period and current fiscal quarter as compared to the corresponding periods of the preceding fiscal year.  In order to better understand such changes, this MD&A should be read in conjunction with the Company’s fiscal 2018 audited consolidated financial statements and notes thereto included in our 2018 Form 10-K, Item 7 Management’s Discussion and Analysis of Financial Condition and Results of Operations included in our 2018 Form 10-K  and with our unaudited consolidated financial statements and related notes appearing elsewhere in this quarterly report.

Overview

Orion Group Holdings, Inc., its subsidiaries and affiliates (hereafter collectively referred to as the "Company"), provides a broad range of specialty construction services in the infrastructure, industrial and building sectors of the continental United States, Alaska, and the Caribbean Basin. The Company’s marine segment services the infrastructure sector through marine transportation facility construction, marine pipeline construction, marine environmental structures, dredging of waterways, channels and ports, environmental dredging, design, and specialty services.  Its concrete segment services the building sector by providing turnkey concrete construction services including pour and finish, dirt work, layout, forming, rebar, and mesh across the light commercial structural and other associated business areas. The Company is headquartered in Houston, Texas with offices throughout its operating areas.

Our contracts are obtained primarily through competitive bidding in response to “requests for proposals” by federal, state and local agencies and through negotiation and competitive bidding with private parties and general contractors. Our bidding activity and strategies are affected by such factors as our backlog, current utilization of equipment and other resources, job location, our ability to obtain necessary surety bonds and competitive considerations. The timing and location of awarded contracts may result in unpredictable fluctuations in the results of our operations.

Most of our revenue is derived from fixed-price contracts. We generally record revenue on construction contracts over time, measured by the percentage of actual contract costs incurred to date to total estimated costs for each contract. There are a number of factors that can create variability in contract performance and therefore impact the results of our operations. The most significant of these include the following:

• completeness and accuracy of the original bid;

• increases in commodity prices such as concrete, steel and fuel;

• customer delays, work stoppages, and other costs due to weather and environmental restrictions;

• availability and skill level of workers; and

• a change in availability and proximity of equipment and materials.

All of these factors can have a negative impact on our contract performance, which can adversely affect the timing of revenue recognition and ultimate contract profitability. We plan our operations and bidding activity with these factors in mind and they generally have not had a material adverse impact on the results of our operations in the past.

First quarter2019 recap and 2019 Outlook

During the first quarter, the Company had strong bid markets opportunities, but was impacted by unrecovered labor and equipment costs due to the timing and mix of projects worked on during the quarter. The concrete segment had improved production despite experiencing unfavorable weather patterns during the quarter which continued to impact results. The Company continues to focus on developing opportunities across the infrastructure, industrial, and building sectors through organic growth, greenfield expansion, and strategic acquisition opportunities. Overall, the Company remains pleased with the end market drivers across its business and continues to expect improved results as 2019 progresses.

Marine Segment

Demand for our marine construction services remains strong. We continue to see solid demand to help maintain and expand the

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infrastructure that facilitates the movement of goods and people on or over waterways. Specifically, we continue to see bid opportunities from our private sector energy-related customers as they expand their marine facilities related to the storage, transportation and refining of domestically produced energy. Over the long-term, we expect to see some bid opportunities in this sector from petrochemical-related customers, energy exporters, and liquefied natural gas facilities. Opportunities from local port authorities also remain solid, many of which are related to the completion of the Panama Canal expansion project. Additionally, we expect to see some bid opportunities related to coastal restoration funded through the Resource and Ecosystems Sustainability, Tourist Opportunities and Revived Economies of the Gulf Coast States Act (the "RESTORE Act") throughout 2019. We believe our current equipment fleet will allow us to better meet market demand for projects from both our public and private customers in the future.

In the long-term, we see positive trends in demands for our services in our end markets, including:

• General demand to repair and improve degrading U. S. marine infrastructure;

• Improving economic conditions and increased activity in the petrochemical industry and energy-related companies will necessitate capital expenditures, including larger projects, as well as maintenance call-out work;

• Expected increases in cargo volume and future demands from larger ships transiting the Panama Canal will require ports along the Gulf Coast and Atlantic Seaboard to expand port infrastructure as well as perform additional dredging services;

• The Water Resources Reform and Development Act (the "WRRDA Act") authorizing expenditures for the conservation and development of the nation's waterways as well as addressing funding deficiencies within the Harbor Maintenance Trust Fund;

• Renewed focus on coastal rehabilitation along the Gulf Coast, particularly through the use of RESTORE Act funds based on fines collected related to the 2010 Gulf of Mexico oil spill;

• Funding for highways and transportation under the FAST Act, which provides authority through 2020; and

Nearly $5 billion of federal funding provided by the USACE in connection with disaster recovery in Texas

Concrete Segment

Our concrete segment's demand also remains strong. The Texas building sector is in solid shape as its four major metropolitan areas, and expanding suburbs, continuously retain their positions as leading destinations for families and businesses. Population growth throughout our markets continues to drive new distribution centers, education facilities, office expansion, retail and grocery establishments and new multi-family housing units. In Houston, warehouse construction and new education facilities continue to comprise a large portion of project mix. The Dallas-Fort Worth office continues to see opportunities from warehouse distribution centers and is targeting structural construction opportunities. In the Central Texas office, retail facilities and warehouse construction are driving the project mix. Long-term, we see sustained demand for concrete services in our markets.

Consolidated Results of Operations

Backlog Information

Our contract backlog represents our estimate of the revenues we expect to realize under the portion of contracts remaining to be performed. Given the typical duration of our contracts, which is generally less than a year, our backlog at any point in time usually represents only a portion of the revenue that we expect to realize during a twelve month period. Many projects that make up our backlog may be canceled at any time without penalty; however, we can generally recover actual committed costs and profit on work performed up to the date of cancellation. Although we have not been adversely affected by contract cancellations or modifications in the past, we may be in the future, especially in economically uncertain periods. Consequently, backlog is not necessarily indicative of future results. In addition to our backlog under contract, we also have a substantial number of projects in negotiation or pending award at any time.

Backlog for our marine segment at March 31, 2019 was $219.4 million, as compared with $182.1 million at March 31, 2018.

Backlog for our concrete segment at March 31, 2019 was $192.1 million, as compared with $173.2 million at March 31, 2018.

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Three months ended March 31, 2019 compared with three months ended March 31, 2018

	Three months ended March 31,
	2019					2018
	Amount			Percent		Amount			Percent
	(dollar amounts in thousands)
Contract revenues	$	143,105		100.0	%	$	136,843		100.0	%
Cost of contract revenues	132,886			92.9	%	121,021			88.4	%
Gross profit	10,219			7.1	%	15,822			11.6	%
Selling, general and administrative expenses	16,770			11.7	%	15,014			11.0	%
Gain on sale of assets, net	(374		)	(0.3	)%	(813		)	(0.6	)%
Other gain from continuing operations	—			—	%	(5,448		)	(4.0	)%
Operating (loss) income from operations	(6,177		)	(4.3	)%	7,069			5.2	%
Other (expense) income:
Other income	23			—	%	(2		)	—	%
Interest income	148			0.1	%	—			—	%
Interest expense	(1,325		)	(0.9	)%	(1,477		)	(1.1	)%
Other expense, net	(1,154		)	(0.8	)%	(1,479		)	(1.1	)%
(Loss) income before income taxes	(7,331		)	(5.1	)%	5,590			4.1	%
Income tax expense	593			0.4	%	1,489			1.1	%
Net (loss) income	$	(7,924	)	(5.5	)%	$	4,101		3.0	%

Contract Revenues. Consolidated contract revenues for the three months ended March 31, 2019 were $143.1 million as compared with $136.8 million in the prior year period, which was an increase of $6.3 million, or 4.6%. The increase was primarily attributable to the timing and mix of projects.

Contract revenues generated from private sector customers for the marine segment represented 25.2% of segment contract revenues in the first quarter of 2019, or approximately $15.5 million as compared with $33.3 million or 53.1% for the prior year period. The decrease in revenue was due to a shift in timing and mix of projects.

Contract revenues generated from public sector customers for the marine segment represented 74.8% of segment contract revenues in the first quarter of 2019, or approximately $46.0 million, as compared with $29.5 million or 46.9%, in the comparable prior year period. The increase in revenue was due to a shift in timing and mix of projects.

Contract revenues in the concrete segment are primarily derived from private sector customers. Private sector customers represent $68.9 million, or 84.4%, of total contract revenues for the concrete segment in the first quarter of 2019, compared to $58.9 million, or 79.5% in the prior year period.

Gross Profit.   Gross profit was $10.2 million in the three months ended March 31, 2019, as compared with $15.8 million in the prior year period. Gross margin in the first quarter was 7.1%, as compared with 11.6% in the prior year period. Gross profit decreased primarily due to shift in timing and mix of projects resulting in unrecovered labor and equipment costs, particularly impacting the marine segment.

Selling, General and Administrative Expense. Selling, general and administrative ("SG&A") expenses in the first quarter of 2019 were $16.8 million as compared with $15.0 million in the prior year period, which was an increase of $1.8 million, or 11.7%. The increase was primarily attributable to expenses related to the Invest, Scale, and Grow initiative.

Other income, net of expense.Other expense primarily reflects interest on our borrowings.

Income Tax Expense.  The Company recorded a tax expense of approximately $0.6 million for the three months ended March 31, 2019 and a tax expense of $1.5 million for the three months ended March 31, 2018. The Company has estimated its effective tax rate at (8.1)% for the first quarter of 2019 as compared with 26.6% for the first quarter of 2018.

See Note 12 for additional discussion of the effective tax rate recorded in the first quarter of 2019.

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Segment Results

The following table sets forth, for the periods indicated, statements of operations data by segment, segment revenues as a percentage of consolidated revenues and segment operating income (loss) as a percentage of segment revenues:

Three months ended March 31, 2019 compared with three months ended March 31, 2018

	Three months ended March 31,
	2019					2018
	Amount			Percent		Amount		Percent
	(dollar amounts in thousands)
Contract revenues
Marine Segment	$	61,487		43.0	%	$	62,791	45.9	%
Concrete Segment	81,618			57.0	%	74,052		54.1	%
Total	$	143,105		100.0	%	$	136,843	100.0	%
Operating income (loss)
Marine Segment	$	(6,456	)	(10.5	)%	$	6,265	10.0	%
Concrete Segment	279			0.3	%	804		1.1	%
Total	$	(6,177	)			$	7,069

Marine Segment

Revenues for the marine segment for the three months ended March 31, 2019 were $61.5 million compared to $62.8 million for the three months ended March 31, 2018, a decrease of $1.3 million, or 2.1%. The decrease is primarily attributable to timing and mix of projects.

Operating loss for the marine segment for the three months ended March 31, 2019 was $6.5 million, compared to $6.3 million in operating income for the three months ended March 31, 2018, a decrease of $12.7 million. The decrease is primarily due to a shift in timing and mix of projects, resulting in unrecovered labor and equipment costs. Additionally, the Company recognized a $5.4 million gain on the settlement of a legal matter in the first quarter of 2018. As a percentage of revenues, operating loss for our marine segment was (10.5)% for the three months ended March 31, 2019 compared to 10.0% of operating income for the three months ended March 31, 2018.

Concrete Segment

Revenues for our concrete segment for the three months ended March 31, 2019 were $81.6 million compared to $74.1 million for the three months ended March 31, 2018, an increase of $7.6 million, or 10.2%. This increase in revenue was primarily due to timing and mix of projects.

Operating income for our concrete segment for the three months ended March 31, 2019 was $0.3 million, compared to $0.8 million for the three months ended March 31, 2018, a decrease of $0.5 million. The decrease was primarily driven by timing and mix of projects and cost overruns on certain projects. As a percentage of revenues, operating income for our concrete segment was 0.3% for the three months ended March 31, 2019 compared to 1.1% for the three months ended March 31, 2018.

Liquidity and Capital Resources

Our primary liquidity needs are to finance our working capital, fund capital expenditures, and pursue strategic acquisitions. Historically, our source of liquidity has been cash provided by our operating activities and borrowings under our Credit Facility (as defined below).

Our working capital position fluctuates from period to period due to normal increases and decreases in operational activity. At March 31, 2019, our working capital was $41.4 million, as compared with $50.8 million at December 31, 2018. Working capital at March 31, 2019 was reduced $5.6 million as a result of the implementation of ASC 842 which brought operating lease liabilities

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on to the balance sheet. As of March 31, 2019, we had cash on hand of $2.6 million. Our borrowing capacity at March 31, 2019 was approximately $41.2 million.

We expect to meet our future internal liquidity and working capital needs, and maintain or replace our equipment fleet through capital expenditure purchases and major repairs, from funds generated by our operating activities for at least the next 12 months.  We believe our cash position is adequate for our general business requirements discussed above and to service our debt.

The following table provides information regarding our cash flows and our capital expenditures for the three months ended March 31, 2019 and 2018:

	Three months ended March 31,
	2019			2018
Cash flows provided by operating activities	$	(1,928	)	$	10,617
Cash flows used in investing activities	$	(3,763	)	$	(2,943	)
Cash flows used in financing activities	$	(368	)	$	(7,559	)
Capital expenditures (included in investing activities above)	$	(3,862	)	$	(4,346	)

Operating Activities. In the first quarter of 2019, the Company's operations used approximately $1.9 million of net cash outflows, as compared with cash provided by operations in the prior year period of approximately $10.6 million. The decrease in cash between periods of $12.5 million was primarily attributable to changes in working capital primarily driven by an increase in accounts receivable in the current year period..

Changes in working capital are normal within our business and are not necessarily indicative of any fundamental change within working capital components or trend in the underlying business.  

Investing Activities. Capital asset additions and betterments to our fleet were $3.9 million in the three months ended March 31, 2019, as compared with $4.3 million in the comparable prior year period. The decrease is primarily a result of timing of purchase of capital assets. The Company is on track to meet its projected capital expenditures budget for the current fiscal year.

Financing Activities. In the three months ended March 31, 2019, there were $11.0 million in draws on our revolving line of credit. We repaid $10.0 million on the revolver, as well as made our regularly scheduled debt payment on the term loan of $0.8 million for a total of $10.8 million in debt payments. In the comparable prior year period, there were no draws on our revolving line of credit. Additionally we repaid $5.0 million on the revolver, as well as made our regularly scheduled debt payments on the term loan of $3.4 million for a total of $8.4 million in debt payments.

Sources of Capital

The Company entered into an amended syndicated credit agreement (the "Credit Agreement" also known as the "Fourth Amendment") on July 31, 2018, with Regions Bank, as administrative agent and collateral agent, and the following co-syndication agents: Bank of America, N.A., BOKF, NA dba Bank of Texas, KeyBank National Association, NBH Bank, IBERIABANK, Trustmark National Bank, First Tennessee Bank NA, and Branch Baking and Trust Company. The primary purpose of the Credit Agreement was to provide the Company with greater flexibility as it provides for the calculation of Adjusted EBITDA that adds back various project specific costs.

The Credit Agreement, which may be amended from time to time, provides for borrowings under a revolving line of credit and swingline loans with a commitment amount of $100.0 million, and a term loan with a commitment amount of $60.0 million (together, the “Credit Facility”). With the execution of the Fifth Amendment, the maximum borrowing availability under the revolving line of credit as of December 31, 2018, was temporarily reduced to $65.0 million and will remain in effect until certain conditions have been met. The Credit Facility is guaranteed by the subsidiaries of the Company, secured by the assets of the Company, including stock held in its subsidiaries, and may be used to finance general corporate and working capital purposes, to finance capital expenditures, to refinance existing indebtedness, to finance permitted acquisitions and associated fees, and to pay for all related expenses to the Credit Facility. Interest is due and is computed based on the designation of the loan, with the option of a Base Rate Loan (the base rate plus the Applicable Margin), or an Adjusted LIBOR Rate Loan (the adjusted LIBOR rate plus the Applicable Margin).  Interest is due on the last day of each quarter end for Base Rate Loans and at the end of the LIBOR rate period for Adjusted LIBOR Rate Loans. Principal balances drawn under the Credit Facility may be prepaid at any time, in whole

32

or in part, without premium or penalty.  Amounts repaid under the revolving line of credit may be re-borrowed. The Credit Facility matures on July 31, 2023.

See Note 11 in the Notes to the Financial Statements (of this Form 10-Q) for further discussion on the Company's Debt.

Financial covenants

Restrictive financial covenants under the Credit Facility include:

• A consolidated Fixed Charge Coverage Ratio as of the end of any fiscal quarter to not be less than 1.25 to 1.00

• A consolidated Leverage Ratio to not exceed the following during each noted period:

-Fiscal Quarter Ending December 31, 2018, to not exceed 3.00 to 1.00;

-Fiscal Quarter Ending March 31, 2019, to not exceed 4.75 to 1.00;

-Fiscal Quarter Ending June 30, 2019, to not exceed 4.75 to 1.00;

-Fiscal Quarter Ending September 30, 2019 and each Fiscal Quarter thereafter, to not exceed 3.00 to 1.00.

During the first quarter of 2019, the Company initiated discussions with the lead bank due to concerns that it would not be in compliance with financial covenants and executed the Sixth Amendment during May 2019. With the execution of the aforementioned amendment, the Company obtained a waiver on the financial covenants as of March 31, 2019.

In addition, the Credit Facility contains events of default that are usual and customary for similar arrangements, including non-payment of principal, interest or fees; breaches of representations and warranties that are not timely cured; violation of covenants; bankruptcy and insolvency events; and events constituting a change of control.

The Company expects to meet its future internal liquidity and working capital needs, and maintain or replace its equipment fleet through capital expenditure purchases and major repairs, from funds generated by our operating activities for at least the next 12 months.  The Company believes that our cash position and available borrowings together with cash flow from our operations is adequate for general business requirements and to service its debt.

Derivative Financial Instruments

On September 16, 2015, the Company entered into a series of receive-variable, pay-fixed interest rate swaps to hedge the variability in the interest payments on 50% of the aggregate principal amount of the Regions Term Loan outstanding, beginning with a notional amount of $67.5 million. There are a total of five sequential interest rate swaps to achieve the hedged position and each year on August 31, with the exception of the final swap, the existing interest rate swap is scheduled to expire and will be immediately replaced with a new interest rate swap until the expiration of the final swap on July 31, 2020. On December 6, 2018, the Company entered a sixth receive-variable, pay-fixed interest rate swaps to hedge the variability of interest payments. The sixth swap will begin with a notional amount of $27.0 million on July 31, 2020 will hedge the variability in the interest payments on 50% of the aggregate scheduled principal amount of the Regions Term Loan outstanding. The sixth swap is scheduled to expire on June 30, 2023. At inception, these interest rate swaps were designated as a cash flow hedge for hedge accounting, and as such, the effective portion of unrealized changes in market value are recorded in accumulated other comprehensive income (loss) and reclassified into earnings during the period in which the hedged forecasted transaction affects earnings. Gains and losses from hedge ineffectiveness are recognized in current earnings. The change in fair market value of the swaps as of March 31, 2019 is less than $0.3 million, which is reflected in the balance sheet as a liability. The fair market value of the swaps as of March 31, 2019 is approximately $(0.4) million. See Note 8 for more information regarding the fair value of the Company's derivative instruments.

Bonding Capacity

We are generally required to provide various types of surety bonds that provide additional security to our customers for our

performance under certain government and private sector contracts. Our ability to obtain surety bonds depends on our capitalization, working capital, past performance and external factors, including the capacity of the overall surety market. At March 31, 2019, our maximum capacity under our current bonding arrangement was at least $500 million, with approximately $127 million of remaining availability. We believe our strong balance sheet and working capital position will allow us to continue to access our bonding capacity.

33

Effect of Inflation

We are subject to the effects of inflation through increases in the cost of raw materials and other items, such as fuel, concrete, and steel. Due to the relative short-term duration of our projects, we are generally able to include anticipated price increases in the cost of our bids.

Item 3.                      Quantitative and Qualitative Disclosures about Market Risk

In the normal course of business, our results of operations are subject to risks related to fluctuation in commodity prices and fluctuations in interest rates. Historically, our exposure to foreign currency fluctuations has not been material and has been limited to temporary field accounts located in foreign countries where we perform work. Foreign currency fluctuations were immaterial in this reporting period.

Commodity price risk

We are subject to fluctuations in commodity prices for such items as concrete, steel products and fuel.  Although we routinely attempt to secure firm quotes from our suppliers, we generally do not hedge against increases in prices for commodity products.  Commodity price risks may have an impact on our results of operations due to the fixed-price nature of many of our contracts, although the short-term duration of our projects may allow us to include price increases in the costs of our bids.

Interest rate risk

At March 31, 2019, we had $80.8 million in outstanding borrowings under our credit facility, with a weighted average interest rate over the three month period of 4.92%.  Also we have entered into a series of receive-variable, pay-fixed interest rate swaps to hedge the variability in the interest payments on 50% of the aggregate principal amount of the term loan component of the credit facility outstanding, beginning with a notional amount of $67.5 million. At inception, these interest rate swaps were designated as a cash flow hedge for hedge accounting. Our objectives in managing interest rate risk are to lower our overall borrowing costs and limit interest rate changes on our earnings and cash flows.  To achieve this, we closely monitor changes in interest rates and we utilize cash from operations to reduce our debt position, if warranted.

Item 4.                      Controls and Procedures

• Evaluation of Disclosure Controls and Procedures.  As required, the Company’s management, with the participation of its Chief Executive Officer and Chief Financial Officer, have conducted an evaluation of the effectiveness of the Company's disclosure controls and procedures (as such term is defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended) as of the end of the period covered by this quarterly report.  Based on that evaluation, the Chief Executive Officer and Chief Financial Officer have concluded that the Company's disclosure controls and procedures are effective as of March 31, 2019.

• Changes in Internal Controls.  During the quarter ended March 31, 2019 , we implemented new controls related to the adoption of Accounting Standards Codification Topic 842, Leases, and the related Accounting Standards Updates (“Topic 842”). There were no other changes to our internal control over financial reporting that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

PART II - Other Information

Item 1.  Legal Proceedings

For information about litigation involving us, see Note 15 to the condensed consolidated financial statements in Part I of this report, which we incorporate by reference into this Item 1 of Part II.

Item 1A.  Risk Factors

There have been no material changes to the risk factors previously disclosed in Part I, Item 1A, "Risk Factors", of our 2018 Form 10-K.

Item 2.  Unregistered Sales of Equity Securities and Use of Proceeds

There were no sales of equity securities in the period ended March 31, 2019.

34

Item 3.  Defaults Upon Senior Securities

None.

Item 4.  Mine Safety Disclosures

Not applicable.

Item 5.  Other Information

None.

35

Item 6.  Exhibits

Exhibit
Number	Description
2.1	Stock Purchase Agreement dated April 9, 2017 by and among Anthony James Bagliore III and Lori Sue Bagliore and T.A.S. Commercial Concrete Construction, LLC (Schedules, exhibits and similar attachments to the Agreement that are not material have been omitted pursuant to Item 601(b)(2) of Regulation S-K. The Company will furnish supplementally a copy of any omitted schedule, exhibit or similar attachment to the SEC upon request) (incorporated herein by reference to Exhibit 2.1 to the Company's Current Report on Form 8-K, filed with the Securities and Exchange Commission on April 13, 2017 (File No. 1-33891)).
3.1	Amended and Restated Certificate of Incorporation of Orion Group Holdings, Inc. (incorporated herein by reference to Exhibit 3.1 to the Company's Quarterly Report on Form 10-Q for the quarter ended June 30, 2016, filed with the Securities and Exchange Commission on August 5, 2016 (File No. 1-33891)).
3.2	Amended and Restated Bylaws of Orion Group Holdings, Inc. (incorporated herein by reference to Exhibit 3.2 to the Company's Quarterly Report on Form 10-Q for the quarter ended June 30, 2016, filed with the Securities and Exchange Commission on August 5, 2016 (File No. 1-33891)).
4.1	Registration Rights Agreement by and between Friedman, Billings, Ramsey & Co., Inc. and Orion Marine Group, Inc. dated May 17, 2007 (incorporated herein by reference to Exhibit 4.1 to the Company's Registration Statement on Form S-1 filed with the Securities and Exchange Commission on August 20, 2007 (File No. 333-145588)).
10.1	Sixth amendment, effective May 7, 2019, to the Credit Agreement dated as of August 5, 2015 among Orion Marine Group, Inc. as Borrower, Certain Subsidiaries of the Borrower Party Hereto From Time to Time, as Guarantors, the Lenders Party Hereto, Regions Bank, as Administrative Agent and Collateral Agent, and Bank of America, N.A., BOKF, NA DBA Bank of Texas, and Branch Banking and Trust Company, Co-syndication Agents, Regions Capital Markets, a division of Regions Bank, as Lead Arranger and Book Manager (incorporated herein by reference to Exhibit 10.1 to the Company’s Current Report on Form 8-K, filed with the Securities and Exchange Commission on May 9, 2019 (File No. 001-33891)).
* 31.1	Certification of the Chief Executive Officer Pursuant to Rules 13a-14(a)/15d-14(a) of the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
* 31.2	Certification of the Chief Financial Officer Pursuant to Rules 13a-14(a)/15d-14(a) of the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
† 32.1	Certification of the Chief Executive Officer and the Chief Financial Officer pursuant to Title 18 U.S.C. 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
*101.INS	XBRL Instance Document.
*101.SCH	XBRL Taxonomy Extension Schema Document.
*101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document.
*101.DEF	XBRL Taxonomy Extension Definition Linkbase Document.
*101.LAB	XBRL Taxonomy Extension Label Linkbase Document.
*101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document.
* filed herewith
† furnished herewith

36

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

	ORION GROUP HOLDINGS, INC.
By:	/s/ Mark R. Stauffer
May 9, 2019	Mark R. Stauffer
	President and Chief Executive Officer
By:	/s/ Robert L. Tabb
May 9, 2019	Robert L. Tabb
	Vice President and Chief Financial Officer

37

EX-31.1

Exhibit 31.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER

PURSUANT TO RULE 13a - 14(a)/15d - 14(a)

OF THE SECURITIES EXCHANGE ACT, AS AMENDED

I, Mark R. Stauffer, certify that:

1.  I have reviewed this Form 10-Q of Orion Group Holdings, Inc;

2.  Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.  Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.  The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)), and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an Quarterly report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.  The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

By:	/s/ Mark R. Stauffer
May 9, 2019	Mark R. Stauffer
	President and Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATION OF CHIEF FINANCIAL OFFICER

PURSUANT TO RULE 13a - 14(a)/15d - 14(a)

OF THE SECURITIES EXCHANGE ACT, AS AMENDED

I, Robert L. Tabb, certify that:

1.  I have reviewed this Form 10-Q of Orion Group Holdings, Inc;

2.  Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.  Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.  The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)), and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an Quarterly report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.  The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

By:	/s/ Robert L. Tabb
May 9, 2019	Robert L. Tabb
	Vice President and Chief Financial Officer

EX-32.1

Exhibit 32.1

SECTION 1350 CERTIFICATIONS

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Orion Group Holdings, Inc (the “Company”) on Form 10-Q for the quarter ended March 31, 2019 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), we, Mark R. Stauffer and Robert L. Tabb, Chief Executive Officer and Chief Financial Officer, respectively, of the Company, certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, that to our knowledge:

1) The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2) The information contained in the Report fairly presents, in all material respects, the financial condition and result of operations of the Company.

By:	/s/ Mark R. Stauffer
May 9, 2019	Mark R. Stauffer
	President and Chief Executive Officer
By:	/s/ Robert L. Tabb
May 9, 2019	Robert L. Tabb
	Vice President and Chief Financial Officer

XML

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2019	May 09, 2019
Document and Entity Information [Abstract]
Entity Registrant Name	ORION GROUP HOLDINGS INC
Entity Central Index Key	0001402829
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Document Type	10-Q
Document Period End Date	Mar. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Common Stock, Shares Outstanding (in shares)		29,070,639

XML

Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 2,625	$ 8,684
Accounts receivable:
Trade, net of allowance of $4,280 and $4,280, respectively	84,482	77,641
Retainage	34,382	30,734
Other current	3,064	4,257
Income taxes receivable	600	467
Inventory	910	1,056
Costs and estimated earnings in excess of billings on uncompleted contracts	15,133	9,217
Prepaid expenses and other	4,853	5,000
Total current assets	146,049	137,056
Property and equipment, net of depreciation	136,841	148,003
Operating lease right-of-use assets, net of amortization	22,002	0
Financing lease right-of-use assets, net of amortization	8,618	0
Inventory, non-current	7,534	7,598
Goodwill	0	0
Intangible assets, net of amortization	14,127	14,787
Other non-current	5,620	5,426
Total assets	340,791	312,870
Current liabilities:
Current debt, net of debt issuance costs	2,950	2,946
Accounts payable:
Trade	42,611	42,023
Retainage	622	736
Accrued liabilities	13,631	18,840
Taxes payable	533	0
Billings in excess of costs and estimated earnings on uncompleted contracts	35,865	21,761
Current portion of operating lease liabilities	5,595	0
Current portion of financing lease liabilities	2,875	0
Total current liabilities	104,682	86,306
Long-term debt, net of debt issuance costs	76,492	76,119
Operating lease liabilities	17,109	0
Financing lease liabilities	4,862	0
Other long-term liabilities	3,151	8,759
Deferred income taxes	83	49
Interest rate swap liability	336	52
Total liabilities	206,715	171,285
Commitments and contingencies
Stockholders’ equity:
Preferred stock -- $0.01 par value, 10,000,000 authorized, none issued	0	0
Common stock -- $0.01 par value, 50,000,000 authorized, 29,786,007 and 29,611,989 issued; 29,074,776 and 28,900,758 outstanding at March 31, 2019 and December 31, 2018, respectively	297	296
Treasury stock, 711,231 shares, at cost, as of March 31, 2019 and December 31, 2018, respectively	(6,540)	(6,540)
Other comprehensive loss	(336)	(52)
Additional paid-in capital	180,440	179,742
Retained loss	(39,785)	(31,861)
Total stockholders’ equity	134,076	141,585
Total liabilities and stockholders’ equity	$ 340,791	$ 312,870

XML

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 4,280	$ 4,280
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	10,000,000	10,000,000
Preferred stock, shares issued (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	50,000,000	50,000,000
Common stock, shares issued (in shares)	29,786,007	29,611,989
Common stock, shares outstanding (in shares)	29,074,776	28,900,758
Treasury stock, shares (in shares)	711,231	711,231

XML

Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Income Statement [Abstract]
Contract revenues	$ 143,105	$ 136,843
Costs of contract revenues	132,886	121,021
Gross profit	10,219	15,822
Selling, general and administrative expenses	16,770	15,014
Gain on sale of assets, net	(374)	(813)
Other gain from continuing operations	0	5,448
Operating (loss) income from operations	(6,177)	7,069
Other (expense) income:
Other income (expense)	23	(2)
Interest income	148	0
Interest expense	(1,325)	(1,477)
Other expense, net	(1,154)	(1,479)
(Loss) income before income taxes	(7,331)	5,590
Income tax expense	593	1,489
Net (loss) income	$ (7,924)	$ 4,101
Basic (loss) income per share (in dollars per share)	$ (0.27)	$ 0.15
Diluted (loss) income per share (in dollars per share)	$ (0.27)	$ 0.14
Shares used to compute (loss) income per share:
Basic (in shares)	28,927,406	28,143,791
Diluted (in shares)	28,927,406	28,369,762

XML

Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (7,924)	$ 4,101
Change in fair value of cash flow hedge, net of tax benefit of $80 and net of tax expense of $93 for the three months ended March 31, 2019, and March 31, 2018, respectively	(284)	269
Total comprehensive (loss) income	$ (8,208)	$ 4,370

XML

Consolidated Statements of Comprehensive Income (Loss) (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
Change in fair value of cash flow hedge, tax (benefit)	$ (80)	$ 93

XML

Consolidated Statement of Stockholders' Equity (Unaudited) - 3 months ended Mar. 31, 2019 - USD ($) $ in Thousands	Total	Common Stock	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Additional Paid-In Capital	Retained Earnings
Beginning Balance, shares (in shares) at Dec. 31, 2018	29,611,989	29,611,989
Beginning Balance, Treasury stock, shares (in shares) at Dec. 31, 2018	(711,231)		(711,231)
Beginning Balance, amount at Dec. 31, 2018	$ 141,585	$ 296	$ (6,540)	$ (52)	$ 179,742	$ (31,861)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	$ 664				664
Exercise of stock options (in shares)	7,021	7,021
Exercise of stock options	$ 35	$ 0			35
Issuance of restricted stock (in shares)		185,204
Issuance of restricted stock	0	$ 1			(1)
Cash flow hedge, net of tax	(284)			(284)
Forfeiture of restricted stock (in shares)		(18,207)
Net loss	$ (7,924)					(7,924)
Ending Balance, shares (in shares) at Mar. 31, 2019	29,786,007
Ending Balance, Treasury stock, shares (in shares) at Mar. 31, 2019	(711,231)		(711,231)
Ending Balance, amount at Mar. 31, 2019	$ 134,076	$ 297	$ (6,540)	$ (336)	$ 180,440	$ (39,785)

XML

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash flows from operating activities:
Net (loss) income	$ (7,924)	$ 4,101
Adjustments to reconcile net (loss) income to net cash (used in) provided by
Depreciation and amortization	7,040	6,780
Deferred financing cost amortization	84	337
Deferred income taxes	34	1,117
Stock-based compensation	664	334
Gain on sale of property and equipment	(374)	(813)
Other gain from continuing operations	0	(5,448)
Change in operating assets and liabilities:
Accounts receivable	(9,296)	10,954
Notes receivable	104	0
Income tax receivable	(133)	(49)
Inventory	210	688
Prepaid expenses and other	151	(437)
Costs and estimated earnings in excess of billings on uncompleted contracts	(5,916)	3,300
Accounts payable	474	(9,505)
Accrued liabilities	(1,683)	(2,283)
Income tax payable	533	(19)
Billings in excess of costs and estimated earnings on uncompleted contracts	14,104	1,846
Other	0	(286)
Net cash (used in) provided by operating activities	(1,928)	10,617
Cash flows from investing activities:
Proceeds from sale of property and equipment	400	306
Purchase of property and equipment	(3,862)	(4,346)
Contributions to CSV life insurance	(301)	(146)
Proceeds from return of investment	0	93
Insurance claim proceeds related to property and equipment	0	1,150
Net cash used in investing activities	(3,763)	(2,943)
Cash flows from financing activities:
Borrowings from Credit Facility	11,000	0
Payments made on borrowings from Credit Facility	(10,750)	(8,375)
Loan costs from Credit Facility	43	0
Payments of finance lease liabilities	(696)	0
Exercise of stock options	35	816
Net cash used in financing activities	(368)	(7,559)
Net change in cash and cash equivalents	(6,059)	115
Cash and cash equivalents at beginning of period	8,684	9,086
Cash and cash equivalents at end of period	2,625	9,201
Supplemental disclosures of cash flow information, cash paid during the period for:
Interest	1,190	1,163
Taxes, net of refunds	$ 151	$ 25

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Description of Business and Basis of Presentation

3 Months Ended

Mar. 31, 2019

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Description of Business and Basis of Presentation

Description of Business and Basis of Presentation

Description of Business

Orion Group Holdings, Inc., its subsidiaries and affiliates (hereafter collectively referred to as the "Company"), provide a broad range of specialty construction services in the infrastructure, industrial, and building sectors of the continental United States, Alaska and the Caribbean Basin. The Company’s marine segment services the infrastructure sector through marine transportation facility construction, marine pipeline construction, marine environmental structures, dredging of waterways, channels and ports, environmental dredging, design, and specialty services.  Its concrete segment services the building sector by providing turnkey concrete construction services including pour and finish, dirt work, layout, forming, rebar, and mesh across the light commercial, structural and other associated business areas. The Company is headquartered in Houston, Texas with offices throughout its operating areas.

The tools used by the chief operating decision maker ("CODM") to allocate resources and assess performance are based on two reportable and operating segments: marine, which operates under the Orion Marine Group brand and logo, and concrete, which operates under the TAS Commercial Concrete brand and logo.

Although we describe the business in this report in terms of the services the Company provides, its base of customers and the areas in which it operates, the Company has determined that its operations currently comprise two reportable segments pursuant to Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) Topic 280, Segment Reporting.

In making this determination, the Company considered the similar economic characteristics of its operations that comprise its marine segment. For the marine segment, the methods used, and the internal processes employed, to deliver marine construction services are similar throughout the segment, including standardized estimating, project controls and project management. This segment has the same customers with similar funding drivers, and it complies with regulatory environments driven through Federal agencies such as the U.S. Army Corps of Engineers, U.S. Fish and Wildlife Service, U.S. Environmental Protection Agency and U.S. Occupational Safety and Health Administration ("OSHA"), among others. Additionally, the segment is driven by macro-economic considerations including the level of import/export seaborne transportation, development of energy-related infrastructure, cruise line expansion and operations, marine bridge infrastructure development, waterway pipeline crossings and the maintenance of waterways. These considerations, and others, are key catalysts for future prospects and are similar across the segment.

For the concrete segment, the Company also considered the similar economic characteristics of these operations. The methods used, and the internal processes employed, to deliver concrete construction services are similar throughout the segment, including standardized estimating, project controls and project management. This segment complies with regulatory environments such as OSHA. Additionally, this segment is driven by macro-economic considerations, including movements in population, commercial real estate development, institutional funding and expansion, and recreational development, specifically in metropolitan areas of Texas. These considerations, and others, are key catalysts for future prospects and are similar across the segment.

Basis of Presentation

The accompanying consolidated financial statements and financial information included herein have been prepared pursuant to the interim period reporting requirements of Form 10-Q.  Consequently, certain information and note disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States ("U.S. GAAP") have been condensed or omitted.  Readers of this report should also read our consolidated financial statements and the notes thereto included in our Annual Report on Form 10-K for the fiscal year ended December 31, 2018 (“2018 Form 10-K”) as well as Item 7 – Management’s Discussion and Analysis of Financial Condition and Results of Operations also included in our 2018 Form 10-K.

In the opinion of management, the accompanying unaudited consolidated financial statements contain all adjustments considered necessary for a fair presentation of the Company’s financial position, results of operations, and cash flows for the periods presented.  Such adjustments are of a normal recurring nature.  Interim results of operations for the three months ended March 31, 2019 are not necessarily indicative of the results that may be expected for the year ending December 31, 2019.

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Summary of Significant Accounting Principles

3 Months Ended

Mar. 31, 2019

Accounting Policies [Abstract]

Summary of Significant Accounting Principles

Summary of Significant Accounting Principles

The preparation of consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Management's estimates, judgments and assumptions are continually evaluated based on available information and experience; however, actual amounts could differ from those estimates. Please refer to Note 2 of the Notes to Consolidated Financial Statements included in our 2018 Form 10-K for a discussion of other significant estimates and assumptions affecting our consolidated financial statements which are not discussed below.

On an ongoing basis, the Company evaluates the significant accounting policies used to prepare its consolidated financial statements, including, but not limited to, those related to:

• Revenue recognition from construction contracts;

• Accounts receivable and allowance for doubtful accounts;

• Property, plant and equipment;

• Leases;

• Finite and indefinite-lived intangible assets, testing for indicators of impairment;

• Stock-based compensation;

• Income taxes; and

• Self-insurance

Revenue Recognition

The Company adopted ASU 2014-09, Revenue from Contracts with Customers (Topic 606), on January 1, 2018, using the modified retrospective method. The Company recognized the cumulative effect of initially adopting Topic 606 guidance as an adjustment to the beginning balance of retained earnings. Contracts with customers that were not substantially complete in both the Company’s marine and concrete segments were evaluated in order to determine the impact as of the date of adoption.

The Company’s revenue is derived from contracts to provide marine construction, dredging, turnkey concrete services, and other specialty services. The Company’s projects are typically short in duration and usually span a period of less than one year. The Company determines the appropriate accounting treatment for each contract before work begins and generally records revenue on contracts over time.

Performance obligations are promises in a contract to transfer distinct goods or services to the customer and are the unit of account under Topic 606. The Company's contracts and related change orders typically represent a single performance obligation because individual goods and services are not separately identifiable and the Company provides a significant integrated service. Revenue is recognized over time because control is continuously transferred to the customer. For contracts with multiple performance obligations, the Company allocates the contract's transaction price to each performance obligation using its best estimate of the stand-alone selling price of each distinct good or service. Progress is measured by the percentage of actual contract costs incurred to date to total estimated costs for each contract. This method is used because management considers contract costs incurred to be the best available measure of progress on these contracts. Contract costs include all direct costs, such as material and labor, and those indirect costs incurred that are related to contract performance such as payroll taxes and insurance. General and administrative costs are charged to expense as incurred. Upfront costs, such as costs to mobilize personnel and equipment prior to satisfying a performance obligation are capitalized and amortized over the contract performance period.

Changes in job performance, job conditions and estimated profitability, including those arising from final contract settlements, may result in revisions to costs and reported revenue and are recognized in the period in which the revisions are determined. The effect of changes in estimates of contract revenue or contract costs is recognized as an adjustment to recognized revenue on a cumulative catch-up basis. When losses on uncompleted contracts are anticipated, the entire loss is recognized in the period in which such losses are determined. Revenue is recorded net of any sales taxes collected and paid on behalf of the customer, if applicable.

Contract revenue is derived from the original contract price as modified by agreed-upon change orders and estimates of variable consideration related to incentive fees and change orders or claims for which price has not yet been agreed by the customer. The Company estimates variable consideration based on the most likely amount to which it expects to be entitled. Variable consideration is included in the estimated transaction price to the extent it is probable that a significant reversal of cumulative recognized revenue will not occur. As of March 31, 2019, approximately $1.1 million of claims against customers has been recognized and is reflected on the Company's Consolidated Balance Sheet under "Costs and estimated earnings in excess of billings on uncompleted contracts." The Company believes collection of these claims is probable, although the full amount of the recorded claims may not be collected.

Contract assets and liabilities include the following:

• Accounts Receivable: Trade, net of allowance - Represent amounts billed and currently due from customers and are stated at their net estimated realizable value.

• Accounts Receivable: Retainage - Represent amounts which have not been billed to customers or paid pursuant to retainage provisions in construction contracts, which generally become payable upon contract completion and acceptance by the customer.

• Costs and Estimated Earnings in Excess of Billings on Uncompleted Contracts - Represent revenues recognized in excess of amounts billed, which management believes will be billed and collected within one year of the completion of the contract (i.e. Contract Assets) and are recorded as a current asset.

• Billings in Excess of Costs and Estimated Earnings on Uncompleted Contracts - Represent billings in excess of revenues recognized (i.e. Contract Liabilities) and are recorded as a current liability.

Remaining performance obligations represent the transaction price of firm orders or other written contractual commitments from customers for which work has not been performed, or is partially completed and excludes unexercised contract options and potential orders.As of March 31, 2019, the aggregate amount of the remaining performance obligations was approximately $411.5 million. Of this amount, the Company expects to recognize $396.4 million, or 96%, in the next 12 months and the remaining balance thereafter.

Classification of Current Assets and Liabilities

The Company includes in current assets and liabilities amounts realizable and payable in the normal course of contract completion.

Cash and Cash Equivalents

The Company considers all highly liquid investments with a maturity of three months or less when purchased to be cash equivalents.  At times, cash held by financial institutions may exceed federally insured limits.  The Company has not historically sustained losses on its cash balances in excess of federally insured limits.  Cash equivalents at March 31, 2019 and December 31, 2018 consisted primarily of overnight bank deposits.

Risk Concentrations

Financial instruments that potentially subject the Company to concentrations of credit risk principally consist of accounts receivable.

The Company depends on its ability to continue to obtain federal, state and local governmental contracts, and indirectly on the amount of funding available to these agencies for new and current governmental projects. Therefore, a portion of the Company’s operations is dependent upon the level and timing of government funding.  Statutory mechanics liens provide the Company high priority in the event of lien foreclosures following financial difficulties of private owners, thus minimizing credit risk with private customers.

Accounts Receivable

Accounts receivable are stated at the historical carrying value, less allowances for doubtful accounts. The Company has significant investments in billed and unbilled receivables as of March 31, 2019 and December 31, 2018. Billed receivables represent amounts billed upon the completion of small contracts and progress billings on large contracts in accordance with contract terms and milestone achievements. Unbilled receivables on contracts, which are included in costs in excess of billings, arise as revenues are recognized over time. Unbilled amounts on contracts represent recoverable costs and accrued profits not yet billed. Revenue associated with these billings is recorded net of any sales tax, if applicable. Past due balances over 90 days and other higher risk amounts are reviewed individually for collectability.  In establishing an allowance for doubtful accounts, the Company evaluates its contract receivables and costs in excess of billings and thoroughly reviews historical collection experience, the financial condition of its customers, billing disputes and other factors. The Company writes off potentially uncollectible accounts receivable against the allowance for doubtful accounts if it is determined that the amounts will not be collected or if a settlement is reached for an amount that is less than the carrying value. As of March 31, 2019 and December 31, 2018, the Company has recorded an allowance for doubtful accounts of $4.3 million.

Balances billed to customers but not paid pursuant to retainage provisions in construction contracts generally become payable upon contract completion and acceptance by the owner.  Retainage at March 31, 2019 totaled $34.4 million, of which $4.8 million is expected to be collected beyond March 31, 2020. Retainage at December 31, 2018 totaled $30.7 million.

The Company negotiates change orders and claims with its customers. Unsuccessful negotiations of claims could result in a change to contract revenue that is less than amounts recorded, which could result in the recording of a loss. Successful claims negotiations could result in the recovery of previously recorded losses. Significant losses on receivables could adversely affect the Company’s financial position, results of operations and overall liquidity.

Advertising Costs

The Company primarily obtains contracts through an open bid process, and therefore advertising costs are not a significant component of expense.  Advertising costs are expensed as incurred.  

Environmental Costs

Costs related to environmental remediation are charged to expense. Other environmental costs are also charged to expense unless they increase the value of the property and/or provide future economic benefits, in which event the costs are capitalized. Environmental liabilities, if any, are recognized when the expenditure is considered probable and the amount can be reasonably estimated. The Company did not recognize any environmental liabilities as of March 31, 2019 and December 31, 2018.

Fair Value Measurements

The Company evaluates and presents certain amounts included in the accompanying consolidated financial statements at “fair value” in accordance with U.S. GAAP, which requires the Company to base its estimates on assumptions that market participants, in an orderly transaction, would use to price an asset or liability, and to establish a hierarchy that prioritizes the information used to determine fair value.  Refer to Note 8 for more information regarding fair value determination.

The Company generally applies fair value valuation techniques on a non-recurring basis associated with (1) valuing assets and liabilities acquired in connection with business combinations and other transactions; (2) valuing potential impairment loss related to long-lived assets; and (3) valuing potential impairment loss related to indefinite-lived intangible assets.

Inventory

Current inventory consists of parts and small equipment held for use in the ordinary course of business and is valued at the lower of cost (using historical average cost) or net realizable value. Where shipping and handling costs are incurred by the Company, these charges are included in inventory and charged to cost of contract revenue upon use. Non-current inventory consists of spare parts (including engines, cutters and gears) that require special order or long-lead times for manufacture or fabrication, but must be kept on hand to reduce downtime. Refer to Note 7 for more information regarding inventory.

Property and Equipment

Property and equipment are recorded at cost. Ordinary maintenance and repairs that do not improve or extend the useful life of the asset are expensed as incurred.  Major renewals and betterments of equipment are capitalized and depreciated generally over three to seven years until the next scheduled maintenance.

When property and equipment are retired or otherwise disposed of, the cost and accumulated depreciation are removed from the accounts and any resulting gain or loss is included in results of operations for the respective period.  Depreciation is computed using the straight-line method over the estimated useful lives of the related assets for financial statement purposes, as follows:

Automobiles and trucks	3 to 5 years
Buildings and improvements	5 to 30 years
Construction equipment	3 to 15 years
Vessels and other equipment	1 to 15 years
Office equipment	1 to 5 years

The Company generally uses accelerated depreciation methods for tax purposes where appropriate.

Dry-docking costs are capitalized and amortized using the straight-line method over a period ranging from three to 15 years. Dry-docking costs include, but are not limited to, the inspection, refurbishment and replacement of steel, engine components, tailshafts, mooring equipment and other parts of the vessel.  Amortization related to dry-docking activities is included as a component of depreciation.  These costs and the related amortization periods are periodically reviewed to determine if the estimates are accurate.  If warranted, a significant upgrade of equipment may result in a revision to the useful life of the asset, in which case the change is accounted for prospectively.

Property and equipment are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset or asset group may not be recoverable. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of an asset to estimated undiscounted future cash flows expected to be generated by the asset. If the carrying amount of an asset exceeds its estimated future cash flows, an impairment charge is recognized in the amount by which the carrying amount of the asset exceeds the fair value of the asset. Assets to be disposed of are separately presented in the balance sheet and reported at the lower of the carrying amount or the fair value, less the costs to sell, and are no longer depreciated. There were no assets classified as held for sale as of March 31, 2019 and December 31, 2018.

Intangible Assets

Intangible assets that have finite lives are amortized.  In addition, the Company evaluates the remaining useful life of intangible assets in each reporting period to determine whether events and circumstances warrant a revision of the remaining period of amortization.  If the estimate of an intangible asset’s remaining life is changed, the remaining carrying value of such asset is amortized prospectively over that revised remaining useful life. Intangible assets that have indefinite lives are not amortized, but are subject to impairment testing at least annually or more frequently if events or circumstances indicate that the asset may be impaired.

The Company has one indefinite-lived intangible asset, a trade name, which is tested for impairment annually on October 31, or whenever events or circumstances indicate that the carrying amount of the trade name may not be recoverable. Impairment is calculated as the excess of the trade name's carrying value over its fair value. The fair value of the trade name is determined using the relief from royalty method, a variation of the income approach. This method assumes that if a company owns intellectual property, it does not have to "rent" the asset and is, therefore, "relieved" from paying a royalty. Once a supportable royalty rate is determined, the rate is then applied to the projected revenues over the expected remaining life of the intangible assets to estimate the royalty savings. This approach is dependent on a number of factors, including estimates of future growth and trends, royalty rates, discount rates and other variables.

See Note 9 for additional discussion of intangible assets and trade name impairment testing.

Stock-Based Compensation

The Company recognizes compensation expense for equity awards over the vesting period based on the fair value of these awards at the date of grant. The computed fair value of these awards is recognized as a non-cash cost over the period the employee provides services, which is typically the vesting period of the award. The fair value of options granted is estimated on the date of grant using the Black-Scholes option-pricing model. The Black-Scholes model requires the use of subjective assumptions in the computation. Changes in these assumptions can cause significant fluctuations in the fair value of the option award. The fair value of restricted stock grants is equivalent to the fair value of the stock issued on the date of grant, and is measured as the mean price of the stock on the day of grant.

Compensation expense is recognized only for share-based payments expected to vest. The Company estimates forfeitures at the date of grant based on historical experience and future expectations and this assessment is updated on a periodic basis. See Note 14 for further discussion of the Company’s stock-based compensation plan.

Income Taxes

The Company determines its consolidated income tax provision using the asset and liability method prescribed by U.S. GAAP,

which requires the recognition of income tax expense for the amount of taxes payable or refundable for the current period and for deferred tax liabilities and assets for the future tax consequences of events that have been recognized in an entity’s financial

statements or tax returns. The Company must make significant assumptions, judgments and estimates to determine its current

provision for income taxes, its deferred tax assets and liabilities, and any valuation allowance to be recorded against any deferred tax asset. The current provision for income tax is based upon the current tax laws and the Company’s interpretation of these laws, as well as the probable outcomes of any tax audits. The value of any net deferred tax asset depends upon estimates of the amount and category of future taxable income reduced by the amount of any tax benefits that the Company does not expect to realize. Actual operating results and the underlying amount and category of income in future years could render current assumptions, judgments and estimates of recoverable net deferred taxes inaccurate, thus impacting the Company’s financial position and results of operations. The Company computes deferred income taxes using the liability method. Under the liability method, deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. Under the liability method, the effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date.

The Company accounts for uncertain tax positions in accordance with the provisions of ASC 740-10 which prescribes a recognition threshold and measurement attribute for financial statement disclosure of tax positions taken, or expected to be taken, on its consolidated tax return.  The Company evaluates and records any uncertain tax positions based on the amount that management deems is more likely than not to be sustained upon examination and ultimate settlement with the tax authorities in the tax jurisdictions in which it operates.

Insurance Coverage

The Company maintains insurance coverage for its business and operations.  Insurance related to property, equipment, automobile, general liability, and a portion of workers' compensation is provided through traditional policies, subject to a deductible or deductibles.  A portion of the Company's workers’ compensation exposure is covered through a mutual association, which is subject to supplemental calls.

The marine segment maintains five levels of excess loss insurance coverage, totaling $200 million in excess of primary coverage. The marine segment's excess loss coverage responds to most of its policies when a primary limit of $1 million has been exhausted; provided that the primary limit for Contingent Maritime Employer’s Liability is $10 million and the Watercraft Pollution Policy primary limit is $5 million. The concrete segment maintains five levels of excess loss insurance coverage, totaling $200 million in excess of primary coverage. The concrete segment's excess loss coverage responds to most of its policies when a primary limit of $1 million has been exhausted.

If a claim arises and a potential insurance recovery is probable, the impending gain is recognized separately from the related loss. The recovery will only be recognized up to the amount of the loss once the recovery of the claim is deemed probable and any excess gain will fall under contingency accounting and will only be recognized once it is realized. The Company does not net insurance recoveries against the related claim liability as the amount of the claim liability is determined without consideration of the anticipated insurance recoveries from third parties.

Separately, the Company’s marine segment employee health care is paid for by general assets of the Company and currently administered by a third party. The administrator has purchased appropriate stop-loss coverage.  Losses on these policies up to the deductible amounts are accrued based upon known claims incurred and an estimate of claims incurred but not reported.  The accruals are derived from known facts, historical trends and industry averages to determine the best estimate of the ultimate expected loss. Actual claims may vary from estimates. Any adjustments to such reserves are included in the consolidated results of operations in the period in which they become known. The Company's concrete segment employee health care is provided through two policies.  A fully funded policy is offered primarily to salaried employees and their dependents while a partially self-funded plan with an appropriate stop-loss is offered primarily to hourly employees and their dependents. The self-funded plan is funded to the maximum exposure and, as a result, is expected to receive a partial refund after the policy expiration.

The accrued liability for insurance includes incurred but not reported claims of $4.0 million and $5.7 million at March 31, 2019 and December 31, 2018, respectively.

Accounting Standards Adopted in 2019

In February 2016, the Financial Accounting Standards Board ("FASB") issued an ASU 2016-02, Leases (Topic 842), , which requires all lessees to recognize right-of-use ("ROU") assets and lease liabilities, measured at the present value of the future minimum lease payments, at the lease commencement date. Lessor accounting remains largely unchanged under the new guidance. The standard also requires more detailed disclosures to enable users of financial statements to understand the nature, amount, timing, and uncertainty of cash flows arising from leases. The Company adopted the new standard on January 1, 2019, on a prospective basis, forgoing comparative reporting. The Company elected to utilize the transition guidance within the new standard, which allows the Company to carryforward the historical lease classification. The Company elected to not separate leases and non-lease components for all classes of underlying assets in which it is the lessee and made an accounting policy election to not account for leases with an initial term of 12 months or less on the balance sheet. Adoption of the standard resulting in the recording of additional net ROU operating lease assets of approximately $22.0 million and lease liabilities for operating leases of approximately $22.7 million on the Consolidated Balance Sheets as of March 31, 2019. The adoption of this guidance did not have an impact on net income. See Note 17 for more information regarding leases.

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Revenue

3 Months Ended

Mar. 31, 2019

Revenue from Contract with Customer [Abstract]

Revenue

Revenue

Revenues are recognized when control of the promised goods or services is transferred to the customer in an amount that reflects the consideration the Company expects to be entitled to in exchange for those goods or services. The following table represents a disaggregation of the Company’s contract revenue by service line for the marine and concrete segments:

	Three Months Ended March 31, 2019		Three Months Ended March 31, 2018
Marine Segment
Construction	$	33,636	$	42,375
Dredging	26,167		17,011
Specialty Services	1,684		3,405
Marine segment contract revenues	$	61,487	$	62,791
Concrete Segment
Structural	$	11,491	$	17,372
Light Commercial	70,096		56,493
Other	31		187
Concrete segment contract revenues	$	81,618	$	74,052
Total contract revenues	$	143,105	$	136,843

Although the Company has disaggregated its contract revenues here in terms of services provided, it believes its operations comprise two reportable segments pursuant to FASB ASC Topic 280, Segment Reporting. In making this determination, the Company considered the similar characteristics of its operations as discussed in Note 1. Additionally, as discussed, both the marine and concrete segments have limited contracts with multiple performance obligations.  The Company’s contracts often combine multiple services, such as engineering, dredging, diving and construction, into one distinct finished product which is transferred to the customer.  These contracts are often estimated and bid as one project and evaluated on performance as one project, not by individual services performed by each.  Both the marine and concrete segments have a single chief operating decision maker (“CODM”) for the entire segment, not by service lines of the segments.  Resources are allocated by segment and financial and budgetary information is compiled and reviewed by segment, not service line. 

Marine Segment

Construction services include construction, restoration, maintenance, dredging and repair of marine transportation facilities, marine pipelines, bridges and causeways and marine environmental structures. Dredging services generally enhance or preserve the navigability of waterways or the protection of shorelines through the removal or replenishment of soil, sand or rock. Specialty services include design, salvage, demolition, surveying, towing, diving and underwater inspection, excavation and repair.

Concrete Segment

Structural services include elevated concrete pouring for products such as columns, elevated beams and structural walls. Light commercial services include horizontally poured concrete for products such as sidewalks, ramps, tilt walls and trenches. Other services comprise labor related to concrete pouring such as rebar installation and pumping services and typically support our structural and light commercial services.

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Concentration of Risk and Enterprise Wide Disclosures

3 Months Ended

Mar. 31, 2019

Risks and Uncertainties [Abstract]

Concentration of Risk and Enterprise Wide Disclosures

Concentration of Risk and Enterprise Wide Disclosures

Accounts receivable include amounts billed to governmental agencies and private customers and do not bear interest. Balances billed to customers but not paid pursuant to retainage provisions generally become payable upon contract completion and acceptance by the owner.

The table below presents the concentrations of current receivables (trade and retainage) at March 31, 2019 and December 31, 2018, respectively:

	March 31, 2019				December 31, 2018
Federal Government	$	3,533	3	%	$	2,319	2	%
State Governments	509		—	%	916		1	%
Local Governments	39,053		33	%	30,187		28	%
Private Companies	75,769		64	%	74,953		69	%
Total receivables	$	118,864	100	%	$	108,375	100	%

At March 31, 2019 one customer in the local governments category accounted for 12% of total current receivables. At December 31, 2018, no single customer accounted for more than 10% of total current receivables.

Additionally, the table below represents concentrations of contract revenue by type of customer for the three months ended March 31, 2019 and 2018, respectively:

	Three months ended March 31,
	2019		%		2018		%
Federal Government	$	10,277	7	%	$	13,023	10	%
State Governments	4,055		3	%	8,376		6	%
Local Government	44,430		31	%	23,230		17	%
Private Companies	84,343		59	%	92,214		67	%
Total contract revenues	$	143,105	100	%	$	136,843	100	%

In the three months ended March 31, 2019 and 2018, no single customer generated more than 10% of total contract revenues.

The Company does not believe that the loss of any one of its customers would have a material adverse effect on the Company or its subsidiaries and affiliates since no single specific customer sustains such a large portion of receivables or contract revenue over time.

In addition, the concrete segment primarily purchases concrete from select suppliers. The loss of one of these suppliers could adversely impact short-term operations.

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Contracts in Progress

3 Months Ended

Mar. 31, 2019

Contractors [Abstract]

Contracts in Progress

Contracts in Progress

Contracts in progress are as follows at March 31, 2019 and December 31, 2018:

	March 31, 2019			December 31, 2018
Costs incurred on uncompleted contracts	$	601,578		$	461,144
Estimated earnings	63,065			73,170
	664,643			534,314
Less: Billings to date	(685,375		)	(546,858		)
	$	(20,732	)	$	(12,544	)
Included in the accompanying Consolidated Balance Sheet under the following captions:
Costs and estimated earnings in excess of billings on uncompleted contracts	$	15,133		$	9,217
Billings in excess of costs and estimated earnings on uncompleted contracts	(35,865		)	(21,761		)
	$	(20,732	)	$	(12,544	)

As of March 31, 2019 and December 31, 2018, included in cost and estimated earnings in excess of billings on uncompleted projects is approximately $1.1 million related to claims and unapproved change orders.

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Property and Equipment

3 Months Ended

Mar. 31, 2018

Property, Plant and Equipment [Abstract]

Property and Equipment

Property and Equipment

The following is a summary of property and equipment at March 31, 2019 and December 31, 2018:

	March 31, 2019			December 31, 2018
Automobiles and trucks	$	1,668		$	1,709
Building and improvements	43,628			43,628
Construction equipment	156,015			161,113
Vessels and other equipment	81,772			90,217
Office equipment	8,114			8,061
	291,197			304,728
Less: Accumulated depreciation	(194,225		)	(195,373		)
Net book value of depreciable assets	96,972			109,355
Construction in progress	4,006			2,785
Land	35,863			35,863
	$	136,841		$	148,003

For the three months ended March 31, 2019 and 2018, depreciation expense was $5.8 million and $5.9 million, respectively. Substantially all depreciation expense is included in the cost of contract revenue in the Company’s Consolidated Statements of Operations.  

Substantially all of the Company’s long-lived assets are located in the United States.

Substantially all of the assets of the Company are pledged as collateral under the Company's Credit Agreement (as defined in Note 11).

See Note 2 to the Company's consolidated financial statements for further discussion of property and equipment.

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Inventory

3 Months Ended

Mar. 31, 2019

Inventory Disclosure [Abstract]

Inventory

Inventory

Current inventory at March 31, 2019 and December 31, 2018, of $0.9 million and $1.1 million, respectively, consisted primarily of spare parts and small equipment held for use in the ordinary course of business.

Non-current inventory at March 31, 2019 and December 31, 2018 of $7.5 million and $7.6 million, respectively, consisted primarily of spare engine components or items which require longer lead times for sourcing or fabrication for certain of the Company's assets to reduce equipment downtime.

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Fair Value

3 Months Ended

Mar. 31, 2019

Fair Value Disclosures [Abstract]

Fair Value

Fair Value

Recurring Fair Value Measurements

The fair value of financial instruments is the amount at which the instrument could be exchanged in a current transaction between willing parties.  Due to their short-term nature, the Company believes that the carrying value of its accounts receivable, other current assets, accounts payable and other current liabilities approximate their fair values.

The Company classifies financial assets and liabilities into the following three levels based on the inputs used to measure fair value in the order of priority indicated:

• Level 1- fair values are based on observable inputs such as quoted prices in active markets for identical assets or liabilities;

• Level 2 - fair values are based on pricing inputs other than quoted prices in active markets for identical assets and liabilities and are either directly or indirectly observable as of the measurement date; and

• Level 3- fair values are based on unobservable inputs in which little or no market data exists.

Financial assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement. The Company's assessment of the significance of a particular input to the fair value requires judgment and may affect the placement of assets and liabilities within the fair value hierarchy levels.

The following table sets forth by level within the fair value hierarchy the Company's recurring financial assets and liabilities that were accounted for at fair value on a recurring basis as of March 31, 2019 and December 31, 2018:

			Fair Value Measurements
	Carrying Value		Level 1	Level 2	Level 3
March 31, 2019
Assets:
Cash surrender value of life insurance policy	$	2,295	—	2,295	—
Liabilities:
Derivatives	$	442	—	442	—
December 31, 2018
Assets:
Cash surrender value of life insurance policy	$	1,993	—	1,993	—
Liabilities:
Derivatives	$	79	—	79	—

The Company's derivatives, which are comprised of interest rate swaps, are valued using a discounted cash flow analysis that incorporates observable market parameters, such as interest rate yield curves and credit risk adjustments that are necessary to reflect the probability of default by us or the counterparty. These derivatives are classified as a Level 2 measurement within the fair value hierarchy. See Note 11 for additional information on the Company's derivative instrument.

Our concrete segment has life insurance policies covering employees with a combined face value of $11.1 million. The policies are invested in mutual funds and the fair value measurement of the cash surrender balance associated with these policies is determined using Level 2 inputs within the fair value hierarchy and will vary with investment performance. These assets are included in the "Other non-current" asset section in the Consolidated Balance Sheets.

Non-Recurring Fair Value Measurements

The Company generally applies fair value valuation techniques on a non-recurring basis associated with (1) valuing assets and liabilities acquired in connection with business combinations and other transactions; (2) valuing potential impairment loss related to long-lived assets; and (3) valuing potential impairment loss related to the indefinite-lived intangible asset.

Other Fair Value Measurements

The fair value of the Company's debt at March 31, 2019 and December 31, 2018 approximated its carrying value of $80.8 million and $80.5 million, respectively, as interest is based on current market interest rates for debt with similar risk and maturity. If the Company's debt was measured at fair value, it would have been classified as a Level 2 measurement in the fair value hierarchy.

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Goodwill and Intangible Assets

3 Months Ended

Mar. 31, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets

Goodwill and Intangible Assets

Goodwill

The table below summarizes changes in goodwill recorded by the Company during the periods ended March 31, 2019 and December 31, 2018, respectively:

	March 31, 2019		December 31, 2018
Beginning balance, January 1	$	—	$	69,483
Impairments	—		(69,483		)
Ending balance	$	—	$	—

In the fourth quarter of 2018, the Company's annual goodwill impairment test indicated that its goodwill was fully impaired, primarily due to a decline in market capitalization and as a result it incurred a goodwill impairment charge of $69.5 million with $33.8 million related to the Marine segment and $35.7 million related to the Concrete segment.

Intangible assets

The tables below present the activity and amortization of finite-lived intangible assets:

	March 31, 2019			December 31, 2018
Intangible assets, January 1	$	35,240		$	35,240
Additions	—			—
Total intangible assets, end of period	35,240			35,240
Accumulated amortization, January 1	$	(27,345	)	$	(23,956	)
Current year amortization	(658		)	(3,389		)
Total accumulated amortization	(28,003		)	(27,345		)
Net intangible assets, end of period	$	7,237		$	7,895

Finite-lived intangible assets were acquired as part of the purchase of TBC, which included contractual backlog and customer relationships. Contractual backlog was valued at approximately $0.1 million and was amortized over seven months in 2017. Customer relationships were valued at approximately $0.7 million and will be amortized over seven years. Both of these assets will be amortized using an accelerated method based on the pattern in which the economic benefits of the assets are consumed. For the three months ended March 31, 2019, $0.7 million of amortization expense was recognized for these assets. Future expense remaining of approximately $7.2 million will be amortized as follows:

2019	1,982
2020	2,069
2021	1,521
2022	1,239
2023	389
Thereafter	37
	$	7,237

Additionally, the Company has one indefinite-lived intangible asset, as described in Note 2. At March 31, 2019 the trade name was valued at approximately $6.9 million and no indicators of impairment existed.

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Accrued Liabilities

3 Months Ended

Mar. 31, 2019

Payables and Accruals [Abstract]

Accrued Liabilities

Accrued Liabilities

Accrued liabilities at March 31, 2019 and December 31, 2018 consisted of the following:

	March 31, 2019		December 31, 2018
Accrued salaries, wages and benefits	$	6,010	$	6,492
Accrual for insurance liabilities	4,034		5,680
Property taxes	871		924
Capital lease liability (1)	—		3,045
Sales taxes	1,876		2,178
Other accrued expenses	840		521
Total accrued liabilities	$	13,631	$	18,840

(1) December 31, 2018 balance relates to capital leases accounting for under ASC 840 and prior to the adoption of ASC 842 as of January 1, 2019.

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Long-term Debt, Line of Credit and Derivatives

3 Months Ended

Mar. 31, 2019

Debt Disclosure [Abstract]

Long-term Debt, Line of Credit and Derivatives

Long-term Debt, Line of Credit and Derivatives

The Company entered into an amended syndicated credit agreement (the "Credit Agreement" also known as the “Fourth Amendment”) on July 31, 2018 with Regions Bank, as administrative agent and collateral agent, and the following co-syndication agents: Bank of America, N.A., BOKF, NA dba Bank of Texas, KeyBank National Association, NBH Bank, IBERIABANK, Trustmark National Bank, First Tennessee Bank NA, and Branch Banking and Trust Company.

The Credit Agreement, which may be amended from time to time, provides for borrowings under a revolving line of credit and swingline loans with a commitment amount of $100.0 million and a term loan with a commitment amount of $60.0 million (together, the “Credit Facility”). The Credit Facility is guaranteed by the subsidiaries of the Company, secured by the assets of the Company, including stock held in its subsidiaries, and may be used to finance general corporate and working capital purposes, to finance capital expenditures, to refinance existing indebtedness, to finance permitted acquisitions and associated fees, and to pay for all related expenses to the Credit Facility. Interest is due and is computed based on the designation of the loan, with the option of a Base Rate Loan (the base rate plus the Applicable Margin), or an Adjusted LIBOR Rate Loan (the adjusted LIBOR rate plus the Applicable Margin).  Interest is due on the last day of each quarter end for Base Rate Loans and at the end of the LIBOR rate period for Adjusted LIBOR Rate Loans. Principal balances drawn under the Credit Facility may be prepaid at any time, in whole or in part, without premium or penalty.  Amounts repaid under the revolving line of credit may be re-borrowed. The Credit Facility matures on July 31, 2023.

Total debt issuance costs for the Fourth Amendment, which included underwriter fees, legal fees and syndication fees were approximately $0.9 million and have been capitalized as non-current deferred charges and amortized using the effective interest rate method over the duration of the loan. During the fourth quarter of 2018, the Company executed the Fifth Amendment and additional costs were incurred of approximately $0.7 million.

The quarterly weighted average interest rate for the Credit Facility as of March 31, 2019 was 4.92%.

The Company's obligations under debt arrangements consisted of the following:

	March 31, 2019							December 31, 2018
	Principal		Debt Issuance Costs(1)			Total		Principal		Debt Issuance Costs(1)			Total
Term loan - current	$	3,000	$	(50	)	$	2,950	$	3,000	$	(54	)	$	2,946
Total current debt	3,000		(50		)	2,950		3,000		(54		)	2,946
Revolving line of credit	23,000		(372		)	22,628		22,000		(213		)	21,787
Term loan - long-term	54,750		(886		)	53,864		55,500		(1,168		)	54,332
Total long-term debt	77,750		(1,258		)	76,492		77,500		(1,381		)	76,119
Total debt	$	80,750	$	(1,308	)	$	79,442	$	80,500	$	(1,435	)	$	79,065

(1) Total debt issuance costs, include underwriter fees, legal fees and syndication fees and fees related to the execution of the Fourth and Fifth Amendments to the Credit Agreement.

Provisions of the revolving line of credit and accordion

The Company has a maximum borrowing availability under the revolving line of credit and swingline loans (as defined in the Credit Agreement) of $100.0 million. With the execution of the Fifth Amendment, the maximum borrowing availability under the revolving line of credit as of December 31, 2018, was temporarily reduced to $65.0 million and will remain in effect until certain conditions have been met. The letter of credit sublimit is equal to the lesser of $20.0 million and the aggregate unused amount of the revolving commitments then in effect. The swingline sublimit is equal to the lesser of $5.0 million and the aggregate unused amount of the revolving commitments then in effect.

Revolving loans may be designated as Base Rate Loan or Adjusted LIBOR Rate Loans, at the Company’s request, and must be made in an aggregate minimum amount of $1.0 million and integral multiples of $250,000 in excess of that amount.  Swingline loans must be made in an aggregate minimum amount of $250,000 and integral multiples of $50,000 in excess of that amount. The Company may convert, change, or modify such designations from time to time.

The Company is subject to a commitment fee for the unused portion of the maximum available to borrow under the revolving line of credit. The commitment fee, which is due quarterly in arrears, is equal to the Applicable Margin of the actual daily amount by which the Aggregate Revolving Commitments exceeds the Total Revolving Outstanding. The revolving line of credit termination date is the earlier of the Credit Facility termination date, July 31, 2023, or the date the outstanding balance is permanently reduced to zero.

The maturity date for amounts drawn under the revolving line of credit is the earlier of the Facility termination date of July 31, 2023, or the date the outstanding balance is permanently reduced to zero. Prior to the fourth quarter of 2018, the Company classified amounts drawn as current liabilities based on an intent and ability to repay the amounts using current assets within the next twelve months. During the fourth quarter of 2018, the Company determined it no longer has the intent to repay amounts drawn within the next twelve months. Therefore, the Company has classified the entire outstanding balance of the revolving line of credit as non-current.

As of March 31, 2019, the outstanding balance for all borrowings under the revolving line of credit was $23.0 million and was designated as an Adjusted LIBOR Rate Loan at a rate of 5.25%. There were also $0.8 million in outstanding letters of credit as of March 31, 2019, which reduced the maximum borrowing availability on the revolving line of credit to $41.2 million as of March 31, 2019. During the three months ended March 31, 2019 , the Company drew down $11.0 million and made payments of $10.0 million on the revolving line of credit.

Provisions of the term loan

The original principal amount of $60.0 million for the term loan commitment is paid off in quarterly installment payments (as stated in the Credit Agreement). At March 31, 2019, the outstanding term loan component of the Credit Facility totaled $57.8 million and was secured by specific assets of the Company.

The table below outlines the total remaining payment amounts annually for the term loan through maturity of the Credit Facility:

2019	2,250
2020	3,750
2021	4,500
2022	5,250
2023	42,000
	$	57,750

During the three months ended March 31, 2019, the Company made the scheduled quarterly principal payment of $0.8 million, which reduced the outstanding principal balance to $57.8 million as of March 31, 2019. The current portion of debt is $3.0 million and the non-current portion is $54.8 million. As of March 31, 2019, the term loan was designated as an Adjusted LIBOR Rate Loan with an interest rate of 5.25%.

Financial covenants

Restrictive financial covenants under the Credit Facility include:

• A consolidated Fixed Charge Coverage Ratio as of the end of any fiscal quarter to not be less than 1.25 to 1.00.

• A consolidated Leverage Ratio to not exceed the following during each noted period:

-Fiscal Quarter Ending December 31, 2018, to not exceed 3.00 to 1.00;

-Fiscal Quarter Ending March 31, 2019, to not exceed 4.75 to 1.00;

-Fiscal Quarter Ending June 30, 2019, to not exceed 4.75 to 1.00;

-Fiscal Quarter Ending September 30, 2019 and each Fiscal Quarter thereafter, to not exceed 3.00 to 1.00.

During the first quarter of 2019, the Company initiated discussions with the lead bank due to concerns that it would not be in compliance with financial covenants and executed the Sixth Amendment during May 2019. With the execution of the aforementioned amendment, the Company obtained a waiver on the financial covenants as of March 31, 2019.

In addition, the Credit Facility contains events of default that are usual and customary for similar arrangements, including non-payment of principal, interest or fees; breaches of representations and warranties that are not timely cured; violation of covenants; bankruptcy and insolvency events; and events constituting a change of control.

The Company expects to meet its future internal liquidity and working capital needs, and maintain or replace its equipment fleet through capital expenditure purchases and major repairs, from funds generated by its operating activities for at least the next 12

months. The Company believes that its cash position and available borrowings together with cash flow from its operations is

adequate for general business requirements and to service its debt.

Derivative Financial Instruments

On September 16, 2015, the Company entered into a series of receive-variable, pay-fixed interest rate swaps to hedge the variability in the interest payments on 50% of the aggregate principal amount of the Regions Term Loan outstanding, beginning with a notional amount of $67.5 million. There are a total of five sequential interest rate swaps to achieve the hedged position and each year on August 31, with the exception of the final swap, the existing interest rate swap is scheduled to expire and will be immediately replaced with a new interest rate swap until the expiration of the final swap on July 31, 2023. On December 6, 2018, the Company entered into a sixth receive-variable, pay-fixed interest rate swaps to hedge the variability of interest payments. The sixth swap will begin with a notional amount of $27.0 million on July 31, 2020 will hedge the variability in the interest payments on 50% of the aggregate scheduled principal amount of the Regions Term Loan outstanding. The sixth swap is scheduled to expire on July 31, 2023. At inception, these interest rate swaps were designated as a cash flow hedge for hedge accounting, and as such, the effective portion of unrealized changes in market value are recorded in accumulated other comprehensive (loss) income and reclassified into earnings during the period in which the hedged forecasted transaction affects earnings. Gains and losses from hedge ineffectiveness are recognized in current earnings. The change in fair market value of the swaps as of March 31, 2019 is $0.3 million, which is reflected in the balance sheet as a liability in Other non-current liabilites on the Consolidated Balance Sheets. The fair market value of the swaps as of March 31, 2019 is $(0.4) million. See Note 8 for more information regarding the fair value of the Company's derivative instruments.

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Income Taxes

3 Months Ended

Mar. 31, 2019

Income Tax Disclosure [Abstract]

Income Taxes

Income Taxes

The Company's effective tax rate is based on expected income, statutory rates and tax planning opportunities available to it. For interim financial reporting, the Company estimates its annual tax rate based on projected taxable (loss) income for the full year and records a quarterly tax provision in accordance with the anticipated annual rate. Income tax expense included in the Company’s accompanying Consolidated Statements of Operations was as follows (in thousands, except percentages):

	Three months ended March 31,
	2019			2018
Income tax expense	$	593		$	1,489
Effective tax rate	(8.1		)%	26.6		%

The effective rate for the three months ended March 31, 2019 differed from the Company's statutory federal rate of 21% primarily due to to the recording of an additional valuation allowance to offset net operating loss carryforwards generated during the period, state income taxes and the non-deductibility of certain permanent items.

During the year ended December 31, 2018 the Company assessed the realizability of its deferred tax assets and determined that it was not more likely than not that some portion or all the deferred tax assets would not be realized and therefore recorded a valuation allowance on the net deferred tax assets. The Company assesses the available positive and negative evidence to estimate if sufficient future taxable income will be generated to use the existing deferred tax assets. The Company considers the scheduled reversal of deferred tax liabilities, available carryback periods, and tax-planning strategies in making this assessment. For the period ended March 31, 2019 the Company evaluated all positive and negative evidence in determining the amount of deferred tax assets more likely than not to be realized. Based on the review of available evidence, Management believes that a valuation allowance on the net deferred tax assets at March 31, 2019 remains appropriate.

The Company does not expect that unrecognized tax benefits as of March 31, 2019 for certain federal income tax matters will significantly change due to any settlement and/or expiration of statutes of limitations over the next 12 months. The final outcome of these uncertain tax positions is not yet determinable. The Company's uncertain tax benefits, if recognized, would affect the Company's effective tax rate.

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(Loss) Earnings Per Share

3 Months Ended

Mar. 31, 2019

Earnings Per Share [Abstract]

(Loss) Earnings Per Share

(Loss) Earnings Per Share

Basic (loss) earnings per share is based on the weighted average number of common shares outstanding during each period. Diluted (loss) earnings per share is based on the weighted average number of common shares outstanding as well as the effect of all dilutive common stock equivalents during each period net income is generated. The exercise price for certain stock options awarded by the Company exceeds the average market price of the Company's common stock. Such stock options are antidilutive and are not included in the computation of (loss) earnings per share. For the three month periods ended March 31, 2019 and March 31, 2018, the Company had 1,748,489 and 1,926,288 securities, respectively, that were potentially dilutive in future earnings per share calculations. Such dilution will be dependent on the excess of the market price of our stock over the exercise price and other components of the treasury stock method.

The following table reconciles the denominators used in the computations of both basic and diluted earnings (loss) per share:

	Three months ended March 31,
	2019	2018
Basic:
Weighted average shares outstanding	28,927,406	28,143,791
Diluted:
Total basic weighted average shares outstanding	28,927,406	28,143,791
Effect of dilutive securities:
Common stock options	—	225,971
Total weighted average shares outstanding assuming dilution	28,927,406	28,369,762
Shares of common stock issued from the exercise of stock options	7,021	146,765

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Stock-Based Compensation

3 Months Ended

Mar. 31, 2019

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Stock-Based Compensation

Stock-Based Compensation

The Compensation Committee of the Company's Board of Directors is responsible for the administration of the Company's stock incentive plans, which include the 2017 Long Term Incentive Plan, or the "2017 LTIP", which was approved by shareholders in May 2017 and authorized the maximum aggregate number of shares of common stock to be issued at 2,400,000. In general, the Company's 2017 LTIP provides for grants of restricted stock and stock options to be issued with a per-share price equal to the fair market value of a share of common stock on the date of grant.  Option terms are specified at each grant date, but are generally 10 years from the date of issuance.  Options generally vest over a three year period.  

The Company awards certain executives shares of performance based stock options, with 100% of shares to be earned based on the achievement of an objective return on invested capital measured over a two-year performance period. The Company evaluates the probability of achieving this each reporting period.

The Company applies a 3.2% and a 5.5% forfeiture rate, which gets compounded over the vesting terms of the individual award, to its restricted stock and option grants, respectively, based on historical analysis.

In the three months ended March 31, 2019 and 2018, compensation expense related to stock based awards outstanding was $0.7 million and $0.3 million, respectively.

In January 2019, certain independent directors were awarded a total of 16,854 shares of restricted common stock, which vested immediately on the date of grant. The fair value of all shares awarded on the date of the grant was $4.45 per share.

In March 2019, the Company granted an executive of the Company 168,350 shares of restricted common stock, which vests 1/3 at March 31, June 30, and September 30, 2019, respectively. The fair value of all shares awarded on the date of the grant was $2.97 per share.

In the three months ended March 31, 2019, 7,021 options were exercised, generating proceeds to the Company of less than $0.1 million. In the three months ended March 31, 2018, 146,765 options were exercised, generating proceeds to the Company of approximately $0.8 million.

At March 31, 2019, total unrecognized compensation expense related to unvested stock and options was approximately $3.2 million, which is expected to be recognized over a period of approximately two years.

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Commitments and Contingencies

3 Months Ended

Mar. 31, 2019

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Commitments and Contingencies

The Company and one former and two current officers are named defendants in a class action lawsuit filed on April 11, 2019 in the United States District Court for the Southern District of Texas, Houston Division, seeking unstated compensatory damages under the federal securities laws allegedly arising from materially false and misleading statements during the period of March 13, 2018 to March 18, 2019. The complaint asserts, among other things, that the current and former officers caused the Company to overstate goodwill in certain periods; overstate accounts receivables; that the company lacked effective internal controls over financial reporting related to goodwill impairment testing and accounts receivables; and that as a result the required adjustments to goodwill and accounts receivables materially impacted the company’s financial statements causing the company’s stock price to be artificially inflated during the class period.  The Company will respond to the complaint, considers all of these allegations without merit and will vigorously contest the allegations. 

In addition, from time to time, the Company is a party to various lawsuits, claims and other legal proceedings that arise in the ordinary course of business. These actions typically seek, among other things, compensation for alleged personal injury, breach of contract, property damage, punitive damages, civil penalties or other losses, or injunctive or declaratory relief. With respect to such lawsuits, the Company accrues reserves when it is probable a liability has been incurred and the amount of loss can be reasonably estimated. The Company does not believe any of these or any other proceedings, individually or in the aggregate, would be expected to have a material adverse effect on results of operations, cash flows, or financial condition

A legal matter was settled for $5.5 million during the first quarter of 2018.  Settlement amounts were recorded in Other gain from continuing operations in the Consolidated Statement of Operations, Prepaid expenses and other (current portion of the notes receivable) and Other non-current assets (non-current portion of the notes receivable) in the Consolidated Balance Sheets.  As of March 31, 2019, the current portion of the notes receivable was $0.8 million and the non-current portion was $2.9 million, net of $0.4 million of unamortized discount.  Legal fees related to this matter were expensed as incurred during the respective reporting period. 

As a result of charges brought in September 2015 and October 2016 by the Houston Police Department, Environmental Enforcement, two subsidiaries of the Company were indicted at the request of the Harris County, Texas District Attorney’s Office by a duly organized Grand Jury of Harris County, Texas for separate but related violations of the Texas Water Code, allegedly arising from the handling of construction concrete at certain work sites. Specifically, both were charged with unlawfully, intentionally or knowingly discharging a waste or pollutant. The Company is subject to a maximum fine in each case of $250,000, but has already declined a $75,000 and subsequently a $15,000 plea bargain in the first case. In the second case, a project supervisor was also indicted. None of these allegations nor the costs of defense, taken separately or as a whole, is expected to have a material impact on the Company’s balance sheet or its liquidity. The Company considers all of these allegations without merit and it will vigorously defend itself and its employee.

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Segment Information

3 Months Ended

Mar. 31, 2019

Segment Reporting [Abstract]

Segment Information

Segment Information

The Company currently operates in two reportable segments: marine and concrete. The Company's financial reporting systems present various data for management to run the business, including profit and loss statements prepared according to the segments presented. The Company uses operating income to evaluate performance between the two segments. Segment information for the periods presented is provided as follows:

	Three months ended March 31, 2019			Three months ended March 31, 2018
Marine
Contract revenues	$	61,487		$	62,791
Operating (loss) income	(6,456		)	6,265
Depreciation and amortization expense	(4,946		)	(4,731		)
Total assets	$	213,162		$	255,484
Property, plant and equipment, net	118,596			127,078
Concrete
Contract revenues	$	81,618		$	74,052
Operating income	279			804
Depreciation and amortization expense	(2,094		)	(2,049		)
Total assets	$	127,220		$	166,949
Property, plant and equipment, net	18,245			17,790

Intersegment revenues between the Company's two reportable segments for the three months ended March 31, 2019 and March 31, 2018 was less than $0.1 million, respectively. The marine segment had foreign revenues of approximately $0.5 million and $6.0 million for the three months ended March 31, 2019 and 2018, respectively. These revenues are derived from projects in the Caribbean Basin and are paid in U.S. dollars. There was no foreign revenue for the concrete segment.

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Leases

3 Months Ended

Mar. 31, 2019

Leases [Abstract]

Leases

Leases

The Company has operating and finance leases for office space, equipment and vehicles.

Management determines if a contract is or contains a lease at inception of the contract or modification of the contract. A contract is or contains a lease if the contract conveys the right to control the use of an identified asset for a period in exchange for consideration. Control over the use of the identified asset means the lessee has both (a) the right to obtain substantially all of the economic benefits from the use of the asset and (b) the right to direct the use of the asset.

Finance and operating lease ROU assets and liabilities are recognized based on the present value of future minimum lease payments over the expected lease term at a commencement date. As the implicit rate is not determinable in most of the Company's leases, management uses the Company's incremental borrowing rate based on the information available at commencement date in determining the present value of future payments. The expected lease term includes options to extend or terminate the lease when it is reasonably certain the Company will exercise such option. Lease expense for minimum lease payments is recognized on a straight-line basis over the expected lease term.

The Company's lease arrangements have lease and non-lease components. Leases with an expected term of 12 months or less are not accounted for on the balance sheet and the related lease expense is recognized on a straight-line basis over the expected lease term.

The Company's lease agreements do not contain any material residual value guarantees or material restrictive covenants.

Leases recorded on the balance sheet consists of the following:

	March 31,
Leases	2019
Assets
Operating lease right-of-use assets, net (1)	$	22,002
Financing lease right-of-use assets, net (2)	8,618
Total assets	$	30,620
Liabilities
Current
Operating	$	5,595
Financing	2,875
Total current	8,470
Noncurrent
Operating	17,109
Financing	4,862
Total noncurrent	21,971
Total liabilities	$	30,441

(1) Operating lease right-of-use assets are recorded net of accumulated amortization of $1.4 million as of March 31, 2019.

(2) Financing lease right-of-use assets are recorded net of accumulated amortization of $4.5 million as of March 31, 2019

Other information related to lease term and discount rate is as follows:

	March 31,
	2019
Weighted Average Remaining Lease Term
Operating leases	5.59 years
Financing leases	1.74 years
Weighted Average Discount Rate
Operating leases (1)	4.76	%
Financing leases	5.44	%

(1) Upon adoption of the new lease standard, discount rates used for existing operating leases were established on January 1, 2019.

The components of lease expense are as follows:

	Three Months Ended
	March 31, 2019
Operating lease costs:
Operating lease cost	$	1,701
Short-term lease cost (1)	68
Financing lease costs:
Interest on lease liabilities	103
Amortization of right-of-use assets	569
Total lease cost	$	2.441

(1) Excludes expenses related to leases with a lease term of one month or less.

Supplemental cash flow information related to leases is as follows:

	Three Months Ended
	March 31, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows for operating leases	$	1,674
Operating cash flows for finance leases	$	103
Financing cash flows for finance leases	$	696
Non-cash activity:
ROU assets obtained in exchange for new operating lease liabilities	$	23,431
ROU assets obtained in exchange for new financing  lease liabilities	$	—

Maturities of lease liabilities are summarized as follows

	Operating Leases		Finance Leases
Year ending December 31,
2019 (excluding the three months ended March 31, 2019)	$	5,022	$	2,783
2020	5,614		2,876
2021	4,298		2,521
2022	2,823		—
2023	2,268		—
Thereafter	6,011		—
Total future minimum lease payments	26,036		8,180
Less - amount representing interest	3,332		443
Present value of future minimum lease payments	22,704		7,737
Less - current lease obligations	5,595		2,875
Long-term lease obligations	$	17,109	$	4,862

Leases

Leases

The Company has operating and finance leases for office space, equipment and vehicles.

Management determines if a contract is or contains a lease at inception of the contract or modification of the contract. A contract is or contains a lease if the contract conveys the right to control the use of an identified asset for a period in exchange for consideration. Control over the use of the identified asset means the lessee has both (a) the right to obtain substantially all of the economic benefits from the use of the asset and (b) the right to direct the use of the asset.

Finance and operating lease ROU assets and liabilities are recognized based on the present value of future minimum lease payments over the expected lease term at a commencement date. As the implicit rate is not determinable in most of the Company's leases, management uses the Company's incremental borrowing rate based on the information available at commencement date in determining the present value of future payments. The expected lease term includes options to extend or terminate the lease when it is reasonably certain the Company will exercise such option. Lease expense for minimum lease payments is recognized on a straight-line basis over the expected lease term.

The Company's lease arrangements have lease and non-lease components. Leases with an expected term of 12 months or less are not accounted for on the balance sheet and the related lease expense is recognized on a straight-line basis over the expected lease term.

The Company's lease agreements do not contain any material residual value guarantees or material restrictive covenants.

Leases recorded on the balance sheet consists of the following:

	March 31,
Leases	2019
Assets
Operating lease right-of-use assets, net (1)	$	22,002
Financing lease right-of-use assets, net (2)	8,618
Total assets	$	30,620
Liabilities
Current
Operating	$	5,595
Financing	2,875
Total current	8,470
Noncurrent
Operating	17,109
Financing	4,862
Total noncurrent	21,971
Total liabilities	$	30,441

(1) Operating lease right-of-use assets are recorded net of accumulated amortization of $1.4 million as of March 31, 2019.

(2) Financing lease right-of-use assets are recorded net of accumulated amortization of $4.5 million as of March 31, 2019

Other information related to lease term and discount rate is as follows:

	March 31,
	2019
Weighted Average Remaining Lease Term
Operating leases	5.59 years
Financing leases	1.74 years
Weighted Average Discount Rate
Operating leases (1)	4.76	%
Financing leases	5.44	%

(1) Upon adoption of the new lease standard, discount rates used for existing operating leases were established on January 1, 2019.

The components of lease expense are as follows:

	Three Months Ended
	March 31, 2019
Operating lease costs:
Operating lease cost	$	1,701
Short-term lease cost (1)	68
Financing lease costs:
Interest on lease liabilities	103
Amortization of right-of-use assets	569
Total lease cost	$	2.441

(1) Excludes expenses related to leases with a lease term of one month or less.

Supplemental cash flow information related to leases is as follows:

	Three Months Ended
	March 31, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows for operating leases	$	1,674
Operating cash flows for finance leases	$	103
Financing cash flows for finance leases	$	696
Non-cash activity:
ROU assets obtained in exchange for new operating lease liabilities	$	23,431
ROU assets obtained in exchange for new financing  lease liabilities	$	—

Maturities of lease liabilities are summarized as follows

	Operating Leases		Finance Leases
Year ending December 31,
2019 (excluding the three months ended March 31, 2019)	$	5,022	$	2,783
2020	5,614		2,876
2021	4,298		2,521
2022	2,823		—
2023	2,268		—
Thereafter	6,011		—
Total future minimum lease payments	26,036		8,180
Less - amount representing interest	3,332		443
Present value of future minimum lease payments	22,704		7,737
Less - current lease obligations	5,595		2,875
Long-term lease obligations	$	17,109	$	4,862

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Subsequent Event

3 Months Ended

Mar. 31, 2019

Subsequent Events [Abstract]

Subsequent Event

Subsequent Event

During the first quarter of 2019, the Company initiated discussions with the lead bank due to concerns that it would not be in compliance with financial covenants and executed the Sixth Amendment during May 2019. With the execution of the aforementioned amendment, the Company obtained a waiver on the financial covenants as of March 31, 2019.

As of the execution date, the amendment will also increase the leverage ratio requirements to 9.50, 6.25, and 4.00 times for the second, third, and fourth quarters of 2019, respectively and provide a covenant waiver on the fixed charge coverage ratio for the second and third quarters of 2019.  The fixed charge coverage ratio requirement will revert back to 1.25 times in the fourth quarter of 2019. The leverage ratio requirement will revert back to 3.00 times in the first quarter of 2020. Additionally, as of the execution date, the amendment will reduce the commitment on the revolving line of credit to $50 million and will include a contingency for an additional $5.0 million reduction if certain circumstances have not been met by May 31, 2019.  With the execution of the Sixth Amendment, the existing Credit Facility will be treated as an extinguishment of debt and accounted for under the guidelines of ASC 470-05, Debt, Modifications and Extinguishments, and all unamortized debt issuance costs of approximately $1.3 million will be recognized as interest expense as of May 2019. The new debt issuance costs of approximately $0.7 million related to the execution of the Sixth Amendment will be amortized through the maturity date.

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Summary of Significant Accounting Principles (Policies)

3 Months Ended

Mar. 31, 2019

Accounting Policies [Abstract]

Basis of Presentation

Basis of Presentation

The accompanying consolidated financial statements and financial information included herein have been prepared pursuant to the interim period reporting requirements of Form 10-Q.  Consequently, certain information and note disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States ("U.S. GAAP") have been condensed or omitted.  Readers of this report should also read our consolidated financial statements and the notes thereto included in our Annual Report on Form 10-K for the fiscal year ended December 31, 2018 (“2018 Form 10-K”) as well as Item 7 – Management’s Discussion and Analysis of Financial Condition and Results of Operations also included in our 2018 Form 10-K.

Revenue Recognition

Revenue Recognition

Classification of Current Assets and Liabilities

Classification of Current Assets and Liabilities

The Company includes in current assets and liabilities amounts realizable and payable in the normal course of contract completion.

Cash and Cash Equivalents

Cash and Cash Equivalents

The Company considers all highly liquid investments with a maturity of three months or less when purchased to be cash equivalents.  At times, cash held by financial institutions may exceed federally insured limits.  The Company has not historically sustained losses on its cash balances in excess of federally insured limits.  Cash equivalents at March 31, 2019 and December 31, 2018 consisted primarily of overnight bank deposits.

Risk Concentrations

Risk Concentrations

Financial instruments that potentially subject the Company to concentrations of credit risk principally consist of accounts receivable.

The Company depends on its ability to continue to obtain federal, state and local governmental contracts, and indirectly on the amount of funding available to these agencies for new and current governmental projects. Therefore, a portion of the Company’s operations is dependent upon the level and timing of government funding.  Statutory mechanics liens provide the Company high priority in the event of lien foreclosures following financial difficulties of private owners, thus minimizing credit risk with private customers.

Accounts Receivable

Accounts Receivable

Accounts receivable are stated at the historical carrying value, less allowances for doubtful accounts. The Company has significant investments in billed and unbilled receivables as of March 31, 2019 and December 31, 2018. Billed receivables represent amounts billed upon the completion of small contracts and progress billings on large contracts in accordance with contract terms and milestone achievements. Unbilled receivables on contracts, which are included in costs in excess of billings, arise as revenues are recognized over time. Unbilled amounts on contracts represent recoverable costs and accrued profits not yet billed. Revenue associated with these billings is recorded net of any sales tax, if applicable. Past due balances over 90 days and other higher risk amounts are reviewed individually for collectability.  In establishing an allowance for doubtful accounts, the Company evaluates its contract receivables and costs in excess of billings and thoroughly reviews historical collection experience, the financial condition of its customers, billing disputes and other factors. The Company writes off potentially uncollectible accounts receivable against the allowance for doubtful accounts if it is determined that the amounts will not be collected or if a settlement is reached for an amount that is less than the carrying value. As of March 31, 2019 and December 31, 2018, the Company has recorded an allowance for doubtful accounts of $4.3 million.

Balances billed to customers but not paid pursuant to retainage provisions in construction contracts generally become payable upon contract completion and acceptance by the owner.  Retainage at March 31, 2019 totaled $34.4 million, of which $4.8 million is expected to be collected beyond March 31, 2020. Retainage at December 31, 2018 totaled $30.7 million.

The Company negotiates change orders and claims with its customers. Unsuccessful negotiations of claims could result in a change to contract revenue that is less than amounts recorded, which could result in the recording of a loss. Successful claims negotiations could result in the recovery of previously recorded losses. Significant losses on receivables could adversely affect the Company’s financial position, results of operations and overall liquidity.

Advertising Costs

Advertising Costs

The Company primarily obtains contracts through an open bid process, and therefore advertising costs are not a significant component of expense.  Advertising costs are expensed as incurred.

Environmental Costs

Environmental Costs

Fair Value Measurements

Fair Value Measurements

The Company evaluates and presents certain amounts included in the accompanying consolidated financial statements at “fair value” in accordance with U.S. GAAP, which requires the Company to base its estimates on assumptions that market participants, in an orderly transaction, would use to price an asset or liability, and to establish a hierarchy that prioritizes the information used to determine fair value.  Refer to Note 8 for more information regarding fair value determination.

The Company generally applies fair value valuation techniques on a non-recurring basis associated with (1) valuing assets and liabilities acquired in connection with business combinations and other transactions; (2) valuing potential impairment loss related to long-lived assets; and (3) valuing potential impairment loss related to indefinite-lived intangible assets.

Inventory

Inventory

Current inventory consists of parts and small equipment held for use in the ordinary course of business and is valued at the lower of cost (using historical average cost) or net realizable value. Where shipping and handling costs are incurred by the Company, these charges are included in inventory and charged to cost of contract revenue upon use. Non-current inventory consists of spare parts (including engines, cutters and gears) that require special order or long-lead times for manufacture or fabrication, but must be kept on hand to reduce downtime. Refer to Note 7 for more information regarding inventory.

Property and Equipment

Property and Equipment

Property and equipment are recorded at cost. Ordinary maintenance and repairs that do not improve or extend the useful life of the asset are expensed as incurred.  Major renewals and betterments of equipment are capitalized and depreciated generally over three to seven years until the next scheduled maintenance.

When property and equipment are retired or otherwise disposed of, the cost and accumulated depreciation are removed from the accounts and any resulting gain or loss is included in results of operations for the respective period.  Depreciation is computed using the straight-line method over the estimated useful lives of the related assets for financial statement purposes, as follows:

Automobiles and trucks	3 to 5 years
Buildings and improvements	5 to 30 years
Construction equipment	3 to 15 years
Vessels and other equipment	1 to 15 years
Office equipment	1 to 5 years

The Company generally uses accelerated depreciation methods for tax purposes where appropriate.

Dry-docking costs are capitalized and amortized using the straight-line method over a period ranging from three to 15 years. Dry-docking costs include, but are not limited to, the inspection, refurbishment and replacement of steel, engine components, tailshafts, mooring equipment and other parts of the vessel.  Amortization related to dry-docking activities is included as a component of depreciation.  These costs and the related amortization periods are periodically reviewed to determine if the estimates are accurate.  If warranted, a significant upgrade of equipment may result in a revision to the useful life of the asset, in which case the change is accounted for prospectively.

Property and equipment are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset or asset group may not be recoverable. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of an asset to estimated undiscounted future cash flows expected to be generated by the asset. If the carrying amount of an asset exceeds its estimated future cash flows, an impairment charge is recognized in the amount by which the carrying amount of the asset exceeds the fair value of the asset. Assets to be disposed of are separately presented in the balance sheet and reported at the lower of the carrying amount or the fair value, less the costs to sell, and are no longer depreciated.

Goodwill

Intangible Assets

Intangible assets that have finite lives are amortized.  In addition, the Company evaluates the remaining useful life of intangible assets in each reporting period to determine whether events and circumstances warrant a revision of the remaining period of amortization.  If the estimate of an intangible asset’s remaining life is changed, the remaining carrying value of such asset is amortized prospectively over that revised remaining useful life. Intangible assets that have indefinite lives are not amortized, but are subject to impairment testing at least annually or more frequently if events or circumstances indicate that the asset may be impaired.

The Company has one indefinite-lived intangible asset, a trade name, which is tested for impairment annually on October 31, or whenever events or circumstances indicate that the carrying amount of the trade name may not be recoverable. Impairment is calculated as the excess of the trade name's carrying value over its fair value. The fair value of the trade name is determined using the relief from royalty method, a variation of the income approach. This method assumes that if a company owns intellectual property, it does not have to "rent" the asset and is, therefore, "relieved" from paying a royalty. Once a supportable royalty rate is determined, the rate is then applied to the projected revenues over the expected remaining life of the intangible assets to estimate the royalty savings. This approach is dependent on a number of factors, including estimates of future growth and trends, royalty rates, discount rates and other variables.

Stock-Based Compensation

Stock-Based Compensation

The Company recognizes compensation expense for equity awards over the vesting period based on the fair value of these awards at the date of grant. The computed fair value of these awards is recognized as a non-cash cost over the period the employee provides services, which is typically the vesting period of the award. The fair value of options granted is estimated on the date of grant using the Black-Scholes option-pricing model. The Black-Scholes model requires the use of subjective assumptions in the computation. Changes in these assumptions can cause significant fluctuations in the fair value of the option award. The fair value of restricted stock grants is equivalent to the fair value of the stock issued on the date of grant, and is measured as the mean price of the stock on the day of grant.

Compensation expense is recognized only for share-based payments expected to vest. The Company estimates forfeitures at the date of grant based on historical experience and future expectations and this assessment is updated on a periodic basis.

Income Taxes

Income Taxes

The Company determines its consolidated income tax provision using the asset and liability method prescribed by U.S. GAAP,

which requires the recognition of income tax expense for the amount of taxes payable or refundable for the current period and for deferred tax liabilities and assets for the future tax consequences of events that have been recognized in an entity’s financial

statements or tax returns. The Company must make significant assumptions, judgments and estimates to determine its current

provision for income taxes, its deferred tax assets and liabilities, and any valuation allowance to be recorded against any deferred tax asset. The current provision for income tax is based upon the current tax laws and the Company’s interpretation of these laws, as well as the probable outcomes of any tax audits. The value of any net deferred tax asset depends upon estimates of the amount and category of future taxable income reduced by the amount of any tax benefits that the Company does not expect to realize. Actual operating results and the underlying amount and category of income in future years could render current assumptions, judgments and estimates of recoverable net deferred taxes inaccurate, thus impacting the Company’s financial position and results of operations. The Company computes deferred income taxes using the liability method. Under the liability method, deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. Under the liability method, the effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date.

The Company accounts for uncertain tax positions in accordance with the provisions of ASC 740-10 which prescribes a recognition threshold and measurement attribute for financial statement disclosure of tax positions taken, or expected to be taken, on its consolidated tax return.  The Company evaluates and records any uncertain tax positions based on the amount that management deems is more likely than not to be sustained upon examination and ultimate settlement with the tax authorities in the tax jurisdictions in which it operates.

Insurance Coverage

Insurance Coverage

The Company maintains insurance coverage for its business and operations.  Insurance related to property, equipment, automobile, general liability, and a portion of workers' compensation is provided through traditional policies, subject to a deductible or deductibles.  A portion of the Company's workers’ compensation exposure is covered through a mutual association, which is subject to supplemental calls.

The marine segment maintains five levels of excess loss insurance coverage, totaling $200 million in excess of primary coverage. The marine segment's excess loss coverage responds to most of its policies when a primary limit of $1 million has been exhausted; provided that the primary limit for Contingent Maritime Employer’s Liability is $10 million and the Watercraft Pollution Policy primary limit is $5 million. The concrete segment maintains five levels of excess loss insurance coverage, totaling $200 million in excess of primary coverage. The concrete segment's excess loss coverage responds to most of its policies when a primary limit of $1 million has been exhausted.

If a claim arises and a potential insurance recovery is probable, the impending gain is recognized separately from the related loss. The recovery will only be recognized up to the amount of the loss once the recovery of the claim is deemed probable and any excess gain will fall under contingency accounting and will only be recognized once it is realized. The Company does not net insurance recoveries against the related claim liability as the amount of the claim liability is determined without consideration of the anticipated insurance recoveries from third parties.

Separately, the Company’s marine segment employee health care is paid for by general assets of the Company and currently administered by a third party. The administrator has purchased appropriate stop-loss coverage.  Losses on these policies up to the deductible amounts are accrued based upon known claims incurred and an estimate of claims incurred but not reported.  The accruals are derived from known facts, historical trends and industry averages to determine the best estimate of the ultimate expected loss. Actual claims may vary from estimates. Any adjustments to such reserves are included in the consolidated results of operations in the period in which they become known. The Company's concrete segment employee health care is provided through two policies.  A fully funded policy is offered primarily to salaried employees and their dependents while a partially self-funded plan with an appropriate stop-loss is offered primarily to hourly employees and their dependents. The self-funded plan is funded to the maximum exposure and, as a result, is expected to receive a partial refund after the policy expiration.

Recent Accounting Pronouncements

In February 2016, the Financial Accounting Standards Board ("FASB") issued an ASU 2016-02, Leases (Topic 842), , which requires all lessees to recognize right-of-use ("ROU") assets and lease liabilities, measured at the present value of the future minimum lease payments, at the lease commencement date. Lessor accounting remains largely unchanged under the new guidance. The standard also requires more detailed disclosures to enable users of financial statements to understand the nature, amount, timing, and uncertainty of cash flows arising from leases. The Company adopted the new standard on January 1, 2019, on a prospective basis, forgoing comparative reporting. The Company elected to utilize the transition guidance within the new standard, which allows the Company to carryforward the historical lease classification. The Company elected to not separate leases and non-lease components for all classes of underlying assets in which it is the lessee and made an accounting policy election to not account for leases with an initial term of 12 months or less on the balance sheet. Adoption of the standard resulting in the recording of additional net ROU operating lease assets of approximately $22.0 million and lease liabilities for operating leases of approximately $22.7 million on the Consolidated Balance Sheets as of March 31, 2019. The adoption of this guidance did not have an impact on net income. See Note 17 for more information regarding leases.

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Summary of Significant Accounting Principles (Tables)

3 Months Ended

Mar. 31, 2019

Mar. 31, 2018

Accounting Policies [Abstract]

Schedule of New Accounting Pronouncements and Changes in Accounting Principles

Depreciable lives of property and equipment

Depreciation is computed using the straight-line method over the estimated useful lives of the related assets for financial statement purposes, as follows:

Automobiles and trucks	3 to 5 years
Buildings and improvements	5 to 30 years
Construction equipment	3 to 15 years
Vessels and other equipment	1 to 15 years
Office equipment	1 to 5 years

The following is a summary of property and equipment at March 31, 2019 and December 31, 2018:

	March 31, 2019			December 31, 2018
Automobiles and trucks	$	1,668		$	1,709
Building and improvements	43,628			43,628
Construction equipment	156,015			161,113
Vessels and other equipment	81,772			90,217
Office equipment	8,114			8,061
	291,197			304,728
Less: Accumulated depreciation	(194,225		)	(195,373		)
Net book value of depreciable assets	96,972			109,355
Construction in progress	4,006			2,785
Land	35,863			35,863
	$	136,841		$	148,003

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Revenue (Tables)

3 Months Ended

Mar. 31, 2019

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

The following table represents a disaggregation of the Company’s contract revenue by service line for the marine and concrete segments:

	Three Months Ended March 31, 2019		Three Months Ended March 31, 2018
Marine Segment
Construction	$	33,636	$	42,375
Dredging	26,167		17,011
Specialty Services	1,684		3,405
Marine segment contract revenues	$	61,487	$	62,791
Concrete Segment
Structural	$	11,491	$	17,372
Light Commercial	70,096		56,493
Other	31		187
Concrete segment contract revenues	$	81,618	$	74,052
Total contract revenues	$	143,105	$	136,843

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Concentration of Risk and Enterprise Wide Disclosures (Tables)

3 Months Ended

Mar. 31, 2019

Accounts receivable

Concentration Risk [Line Items]

Schedules of concentration of risk, by risk factor

The table below presents the concentrations of current receivables (trade and retainage) at March 31, 2019 and December 31, 2018, respectively:

	March 31, 2019				December 31, 2018
Federal Government	$	3,533	3	%	$	2,319	2	%
State Governments	509		—	%	916		1	%
Local Governments	39,053		33	%	30,187		28	%
Private Companies	75,769		64	%	74,953		69	%
Total receivables	$	118,864	100	%	$	108,375	100	%

Contract revenues

Concentration Risk [Line Items]

Schedules of concentration of risk, by risk factor

Additionally, the table below represents concentrations of contract revenue by type of customer for the three months ended March 31, 2019 and 2018, respectively:

	Three months ended March 31,
	2019		%		2018		%
Federal Government	$	10,277	7	%	$	13,023	10	%
State Governments	4,055		3	%	8,376		6	%
Local Government	44,430		31	%	23,230		17	%
Private Companies	84,343		59	%	92,214		67	%
Total contract revenues	$	143,105	100	%	$	136,843	100	%

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Contracts in Progress (Tables)

3 Months Ended

Mar. 31, 2019

Contractors [Abstract]

Summary of Contracts in Progress

Contracts in progress are as follows at March 31, 2019 and December 31, 2018:

	March 31, 2019			December 31, 2018
Costs incurred on uncompleted contracts	$	601,578		$	461,144
Estimated earnings	63,065			73,170
	664,643			534,314
Less: Billings to date	(685,375		)	(546,858		)
	$	(20,732	)	$	(12,544	)
Included in the accompanying Consolidated Balance Sheet under the following captions:
Costs and estimated earnings in excess of billings on uncompleted contracts	$	15,133		$	9,217
Billings in excess of costs and estimated earnings on uncompleted contracts	(35,865		)	(21,761		)
	$	(20,732	)	$	(12,544	)

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Property and Equipment (Tables)

3 Months Ended

Mar. 31, 2019

Mar. 31, 2018

Property, Plant and Equipment [Abstract]

Summary of property and equipment

Depreciation is computed using the straight-line method over the estimated useful lives of the related assets for financial statement purposes, as follows:

Automobiles and trucks	3 to 5 years
Buildings and improvements	5 to 30 years
Construction equipment	3 to 15 years
Vessels and other equipment	1 to 15 years
Office equipment	1 to 5 years

The following is a summary of property and equipment at March 31, 2019 and December 31, 2018:

	March 31, 2019			December 31, 2018
Automobiles and trucks	$	1,668		$	1,709
Building and improvements	43,628			43,628
Construction equipment	156,015			161,113
Vessels and other equipment	81,772			90,217
Office equipment	8,114			8,061
	291,197			304,728
Less: Accumulated depreciation	(194,225		)	(195,373		)
Net book value of depreciable assets	96,972			109,355
Construction in progress	4,006			2,785
Land	35,863			35,863
	$	136,841		$	148,003

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Fair Value (Tables)

3 Months Ended

Mar. 31, 2019

Fair Value Disclosures [Abstract]

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis

The following table sets forth by level within the fair value hierarchy the Company's recurring financial assets and liabilities that were accounted for at fair value on a recurring basis as of March 31, 2019 and December 31, 2018:

			Fair Value Measurements
	Carrying Value		Level 1	Level 2	Level 3
March 31, 2019
Assets:
Cash surrender value of life insurance policy	$	2,295	—	2,295	—
Liabilities:
Derivatives	$	442	—	442	—
December 31, 2018
Assets:
Cash surrender value of life insurance policy	$	1,993	—	1,993	—
Liabilities:
Derivatives	$	79	—	79	—

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Goodwill and Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of changes in goodwill

The table below summarizes changes in goodwill recorded by the Company during the periods ended March 31, 2019 and December 31, 2018, respectively:

	March 31, 2019		December 31, 2018
Beginning balance, January 1	$	—	$	69,483
Impairments	—		(69,483		)
Ending balance	$	—	$	—

Schedule of changes and amortization of finite-lived intangible assets

The tables below present the activity and amortization of finite-lived intangible assets:

	March 31, 2019			December 31, 2018
Intangible assets, January 1	$	35,240		$	35,240
Additions	—			—
Total intangible assets, end of period	35,240			35,240
Accumulated amortization, January 1	$	(27,345	)	$	(23,956	)
Current year amortization	(658		)	(3,389		)
Total accumulated amortization	(28,003		)	(27,345		)
Net intangible assets, end of period	$	7,237		$	7,895

Summary of Finite-lived Intangible Assets Amortization Expense

Future expense remaining of approximately $7.2 million will be amortized as follows:

2019	1,982
2020	2,069
2021	1,521
2022	1,239
2023	389
Thereafter	37
	$	7,237

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Accrued Liabilities (Tables)

3 Months Ended

Mar. 31, 2019

Payables and Accruals [Abstract]

Schedule of accrued liabilities

Accrued liabilities at March 31, 2019 and December 31, 2018 consisted of the following:

	March 31, 2019		December 31, 2018
Accrued salaries, wages and benefits	$	6,010	$	6,492
Accrual for insurance liabilities	4,034		5,680
Property taxes	871		924
Capital lease liability (1)	—		3,045
Sales taxes	1,876		2,178
Other accrued expenses	840		521
Total accrued liabilities	$	13,631	$	18,840

(1) December 31, 2018 balance relates to capital leases accounting for under ASC 840 and prior to the adoption of ASC 842 as of January 1, 2019.

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Long-term Debt, Line of Credit and Derivatives (Tables)

3 Months Ended

Mar. 31, 2019

Debt Disclosure [Abstract]

Schedule of Debt

The Company's obligations under debt arrangements consisted of the following:

	March 31, 2019							December 31, 2018
	Principal		Debt Issuance Costs(1)			Total		Principal		Debt Issuance Costs(1)			Total
Term loan - current	$	3,000	$	(50	)	$	2,950	$	3,000	$	(54	)	$	2,946
Total current debt	3,000		(50		)	2,950		3,000		(54		)	2,946
Revolving line of credit	23,000		(372		)	22,628		22,000		(213		)	21,787
Term loan - long-term	54,750		(886		)	53,864		55,500		(1,168		)	54,332
Total long-term debt	77,750		(1,258		)	76,492		77,500		(1,381		)	76,119
Total debt	$	80,750	$	(1,308	)	$	79,442	$	80,500	$	(1,435	)	$	79,065

(1) Total debt issuance costs, include underwriter fees, legal fees and syndication fees and fees related to the execution of the Fourth and Fifth Amendments to the Credit Agreement.

Debt Maturity Schedule

The table below outlines the total remaining payment amounts annually for the term loan through maturity of the Credit Facility:

2019	2,250
2020	3,750
2021	4,500
2022	5,250
2023	42,000
	$	57,750

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Income Taxes Income tax expense (benefit) (Tables)

3 Months Ended

Mar. 31, 2019

Income Tax Disclosure [Abstract]

Schedule of components of income tax expense (benefit)

	Three months ended March 31,
	2019			2018
Income tax expense	$	593		$	1,489
Effective tax rate	(8.1		)%	26.6		%

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(Loss) Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2019

Earnings Per Share [Abstract]

Schedule of earnings per share, basic and diluted

The following table reconciles the denominators used in the computations of both basic and diluted earnings (loss) per share:

	Three months ended March 31,
	2019	2018
Basic:
Weighted average shares outstanding	28,927,406	28,143,791
Diluted:
Total basic weighted average shares outstanding	28,927,406	28,143,791
Effect of dilutive securities:
Common stock options	—	225,971
Total weighted average shares outstanding assuming dilution	28,927,406	28,369,762
Shares of common stock issued from the exercise of stock options	7,021	146,765

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Segment Information (Tables)

3 Months Ended

Mar. 31, 2019

Segment Reporting [Abstract]

Schedule of Segment Reporting

Segment information for the periods presented is provided as follows:

	Three months ended March 31, 2019			Three months ended March 31, 2018
Marine
Contract revenues	$	61,487		$	62,791
Operating (loss) income	(6,456		)	6,265
Depreciation and amortization expense	(4,946		)	(4,731		)
Total assets	$	213,162		$	255,484
Property, plant and equipment, net	118,596			127,078
Concrete
Contract revenues	$	81,618		$	74,052
Operating income	279			804
Depreciation and amortization expense	(2,094		)	(2,049		)
Total assets	$	127,220		$	166,949
Property, plant and equipment, net	18,245			17,790

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Leases (Tables)

3 Months Ended

Mar. 31, 2019

Leases [Abstract]

Lessee, Assets And Liabilities

Leases recorded on the balance sheet consists of the following:

	March 31,
Leases	2019
Assets
Operating lease right-of-use assets, net (1)	$	22,002
Financing lease right-of-use assets, net (2)	8,618
Total assets	$	30,620
Liabilities
Current
Operating	$	5,595
Financing	2,875
Total current	8,470
Noncurrent
Operating	17,109
Financing	4,862
Total noncurrent	21,971
Total liabilities	$	30,441

(1) Operating lease right-of-use assets are recorded net of accumulated amortization of $1.4 million as of March 31, 2019.

(2) Financing lease right-of-use assets are recorded net of accumulated amortization of $4.5 million as of March 31, 2019

Lessee, Weighted Average Term And Discount Rate

Other information related to lease term and discount rate is as follows:

	March 31,
	2019
Weighted Average Remaining Lease Term
Operating leases	5.59 years
Financing leases	1.74 years
Weighted Average Discount Rate
Operating leases (1)	4.76	%
Financing leases	5.44	%

(1) Upon adoption of the new lease standard, discount rates used for existing operating leases were established on January 1, 2019.

Lease, Cost

The components of lease expense are as follows:

	Three Months Ended
	March 31, 2019
Operating lease costs:
Operating lease cost	$	1,701
Short-term lease cost (1)	68
Financing lease costs:
Interest on lease liabilities	103
Amortization of right-of-use assets	569
Total lease cost	$	2.441

(1) Excludes expenses related to leases with a lease term of one month or less.

Lessee, Supplemental Cash Flows

Supplemental cash flow information related to leases is as follows:

	Three Months Ended
	March 31, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows for operating leases	$	1,674
Operating cash flows for finance leases	$	103
Financing cash flows for finance leases	$	696
Non-cash activity:
ROU assets obtained in exchange for new operating lease liabilities	$	23,431
ROU assets obtained in exchange for new financing  lease liabilities	$	—

Finance Lease, Liability, Maturity

Maturities of lease liabilities are summarized as follows

	Operating Leases		Finance Leases
Year ending December 31,
2019 (excluding the three months ended March 31, 2019)	$	5,022	$	2,783
2020	5,614		2,876
2021	4,298		2,521
2022	2,823		—
2023	2,268		—
Thereafter	6,011		—
Total future minimum lease payments	26,036		8,180
Less - amount representing interest	3,332		443
Present value of future minimum lease payments	22,704		7,737
Less - current lease obligations	5,595		2,875
Long-term lease obligations	$	17,109	$	4,862

Lessee, Operating Lease, Liability, Maturity

Maturities of lease liabilities are summarized as follows

	Operating Leases		Finance Leases
Year ending December 31,
2019 (excluding the three months ended March 31, 2019)	$	5,022	$	2,783
2020	5,614		2,876
2021	4,298		2,521
2022	2,823		—
2023	2,268		—
Thereafter	6,011		—
Total future minimum lease payments	26,036		8,180
Less - amount representing interest	3,332		443
Present value of future minimum lease payments	22,704		7,737
Less - current lease obligations	5,595		2,875
Long-term lease obligations	$	17,109	$	4,862

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Description of Business and Basis of Presentation (Details) - segment	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of reportable segments (segment)	2	2
Number of operating segments (segment)	2

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Summary of Significant Accounting Principles - Revenue Recognition (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Revenue, Major Customer [Line Items]
Costs and estimated earnings in excess of billings on uncompleted contracts	$ 15,133		$ 9,217
Billings in excess of costs and estimated earnings on uncompleted contracts	35,865		21,761
Deferred income taxes	83		49
Retained loss	(39,785)		(31,861)
Contract revenues	143,105	$ 136,843
Costs of contract revenues	132,886	121,021
Gross profit	10,219	15,822
Income tax expense	593	1,489
Net (loss) income	$ (7,924)	$ 4,101
Basic (loss) income per share (in dollars per share)	$ (0.27)	$ 0.15
Diluted (loss) income per share (in dollars per share)	$ (0.27)	$ 0.14
Customer One
Revenue, Major Customer [Line Items]
Contract revenues	$ 1,100
Costs And Estimated Earnings In Excess Of Billings On Uncompleted Contracts [Member]
Revenue, Major Customer [Line Items]
Contract with customer, liability, revenue recognized			$ 0

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Summary of Significant Accounting Principles - Remaining Performance Obligation (Details) $ in Millions	Mar. 31, 2019 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligations expected to be satisfied	$ 396.4
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: (nil)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligations expected to be satisfied	$ 411.5

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Summary of Significant Accounting Principles - Performance Obligation (Details)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2019
Accounting Policies [Abstract]
Remaining performance obligation, percentage		96.00%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligations expected to be satisfied, expected timing	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligations expected to be satisfied, expected timing

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Summary of Significant Accounting Principles - Depreciable Lives of Property and Equipment (Details)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Equipment improvement | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment useful life	3 years
Equipment improvement | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment useful life	7 years
Automobiles and trucks | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment useful life		3 years
Automobiles and trucks | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment useful life		5 years
Building and improvements | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment useful life		5 years
Building and improvements | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment useful life		30 years
Construction equipment | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment useful life		3 years
Construction equipment | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment useful life		15 years
Vessels and other equipment | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment useful life		1 year
Vessels and other equipment | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment useful life		15 years
Office equipment | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment useful life		1 year
Office equipment | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment useful life		5 years
Dry-docking capitalized costs | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment useful life	3 years
Dry-docking capitalized costs | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment useful life	15 years

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Summary of Significant Accounting Principles - Goodwill and Other Intangible Assets (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($) segment	Mar. 31, 2018 segment	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Goodwill [Line Items]
Goodwill | $	$ 0		$ 0	$ 69,483
Number of reportable segments (segment)	2	2
Number of operating segments (segment)	2

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Summary of Significant Accounting Principles - Insurance Coverage (Details)	3 Months Ended
	Mar. 31, 2019 USD ($) levels policy	Dec. 31, 2018 USD ($)
Insurance Coverage [Line Items]
Number of insurance policies (policy) | policy	2
Accrual for insurance liabilities	$ 4,034,000	$ 5,680,000
Marine
Insurance Coverage [Line Items]
Levels of insurance coverage maintained by the Company | levels	5
Amount in excess of primary insurance coverage	$ 200,000,000
Marine | Other liability policies
Insurance Coverage [Line Items]
Primary limit of insurance coverage	1,000,000
Marine | Maritime employer's liability
Insurance Coverage [Line Items]
Primary limit of insurance coverage	10,000,000
Marine | Watercraft pollution policy
Insurance Coverage [Line Items]
Primary limit of insurance coverage	$ 5,000,000
Concrete
Insurance Coverage [Line Items]
Levels of insurance coverage maintained by the Company | policy	5
Amount in excess of primary insurance coverage	$ 200,000,000
Concrete | Other liability policies
Insurance Coverage [Line Items]
Primary limit of insurance coverage	$ 1,000,000

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Summary of Significant Accounting Principles - Prior Period Adjustment (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net (loss) income	$ (7,924)	$ 4,101
Contract revenues	143,105	136,843
Costs of contract revenues	132,886	121,021
Selling, general and administrative expenses	16,770	15,014
Income tax expense	$ 593	$ 1,489

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Summary of Significant Accounting Principles Accounts Receivable (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Accounting Policies [Abstract]
Contract receivable retention	$ 34,382	$ 30,734
Retainage, long-term	$ 4,800

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Summary of Significant Accounting Principles Goodwill (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Goodwill [Line Items]
Goodwill	$ 0	$ 0	$ 69,483

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Summary of Significant Accounting Principles - Accounting Standards Adopted in 2019 (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease, right-of-use asset	$ 22,002		$ 0
Operating lease, liability	$ 22,704
Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease, right-of-use asset		$ 22,000
Operating lease, liability		$ 22,700

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Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Disaggregation of Revenue [Line Items]
Contract revenues	$ 143,105	$ 136,843
Marine
Disaggregation of Revenue [Line Items]
Contract revenues	61,487	62,791
Marine | Construction
Disaggregation of Revenue [Line Items]
Contract revenues	33,636	42,375
Marine | Dredging
Disaggregation of Revenue [Line Items]
Contract revenues	26,167	17,011
Marine | Specialty Services
Disaggregation of Revenue [Line Items]
Contract revenues	1,684	3,405
Concrete
Disaggregation of Revenue [Line Items]
Contract revenues	81,618	74,052
Concrete | Structural
Disaggregation of Revenue [Line Items]
Contract revenues	11,491	17,372
Concrete | Light Commercial
Disaggregation of Revenue [Line Items]
Contract revenues	70,096	56,493
Concrete | Other
Disaggregation of Revenue [Line Items]
Contract revenues	$ 31	$ 187

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Concentration of Risk and Enterprise Wide Disclosures (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Concentration Risk [Line Items]
Contract revenues	$ 143,105	$ 136,843
Customer concentration risk | Trade and contract retainage receivables
Concentration Risk [Line Items]
Trade and retainage receivables	$ 118,864		$ 108,375
Concentration risk, percentage	100.00%		100.00%
Customer concentration risk | Contract revenues
Concentration Risk [Line Items]
Concentration risk, percentage	100.00%	100.00%
Contract revenues	$ 143,105	$ 136,843
Customer concentration risk | Federal Government | Trade and contract retainage receivables
Concentration Risk [Line Items]
Trade and retainage receivables	$ 3,533		$ 2,319
Concentration risk, percentage	3.00%		2.00%
Customer concentration risk | Federal Government | Contract revenues
Concentration Risk [Line Items]
Concentration risk, percentage	7.00%	10.00%
Contract revenues	$ 10,277	$ 13,023
Customer concentration risk | State Governments | Trade and contract retainage receivables
Concentration Risk [Line Items]
Trade and retainage receivables	$ 509		$ 916
Concentration risk, percentage	0.00%		1.00%
Customer concentration risk | State Governments | Contract revenues
Concentration Risk [Line Items]
Concentration risk, percentage	3.00%	6.00%
Contract revenues	$ 4,055	$ 8,376
Customer concentration risk | Local Governments | Trade and contract retainage receivables
Concentration Risk [Line Items]
Trade and retainage receivables	$ 39,053		$ 30,187
Concentration risk, percentage	33.00%		28.00%
Customer concentration risk | Local Governments | Contract revenues
Concentration Risk [Line Items]
Concentration risk, percentage	31.00%	17.00%
Contract revenues	$ 44,430	$ 23,230
Customer concentration risk | Private Companies | Trade and contract retainage receivables
Concentration Risk [Line Items]
Trade and retainage receivables	$ 75,769		$ 74,953
Concentration risk, percentage	64.00%		69.00%
Customer concentration risk | Private Companies | Contract revenues
Concentration Risk [Line Items]
Concentration risk, percentage	59.00%	67.00%
Contract revenues	$ 84,343	$ 92,214

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Concentration of Risk and Enterprise Wide Disclosures Narrative (Details)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Customer concentration risk | Contract revenues
Concentration Risk [Line Items]
Concentration risk, percentage	100.00%	100.00%

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Contracts in Progress (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Contractors [Abstract]
Contract revenues	$ 143,105	$ 136,843
Costs incurred on uncompleted contracts	601,578		$ 461,144
Estimated earnings	63,065		73,170
Costs incurred and estimated earnings on uncompleted contracts	664,643		534,314
Less: Billings to date	(685,375)		(546,858)
Costs and estimated earnings in excess of billings on uncompleted contracts, net	(20,732)		(12,544)
Costs and estimated earnings in excess of billings on uncompleted contracts	15,133		9,217
Billings in excess of costs and estimated earnings on uncompleted contracts	$ (35,865)		$ (21,761)

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Property and Equipment (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 291,197	$ 304,728
Less: accumulated depreciation	(194,225)	(195,373)
Net book value of depreciable assets	96,972	109,355
Property and equipment, net of depreciation	136,841	148,003
Automobiles and trucks
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	1,668	1,709
Building and improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	43,628	43,628
Construction equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	156,015	161,113
Vessels and other equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	81,772	90,217
Office equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	8,114	8,061
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	4,006	2,785
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 35,863	$ 35,863

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Property and Equipment - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Long Lived Assets Held-for-sale [Line Items]
Depreciation		$ 5,800	$ 5,900
Proceeds from sale of property and equipment	$ 400	306
Loss on disposal of property plant and equipment	$ (374)	$ (813)

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Inventory (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Inventory Disclosure [Abstract]
Inventory	$ 910	$ 1,056
Inventory, non-current	$ 7,534	$ 7,598

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Fair Value Schedule of Fair Value Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Assets | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash surrender value of life insurance policy	$ 2,295	$ 1,993
Assets | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash surrender value of life insurance policy	0	0
Assets | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash surrender value of life insurance policy	2,295	1,993
Assets | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash surrender value of life insurance policy	0	0
Liability
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives	(400)
Liability | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives	0	0
Liability | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives	442	79
Liability | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives	$ 0	$ 0

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Fair Value (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Life insurance, face amount	$ 11.1
Carrying (reported) amount, fair value disclosure
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of debt	$ 80.8	$ 80.5

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Goodwill and Intangible Assets - Goodwill Roll Forward (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018	Dec. 31, 2018
Goodwill [Roll Forward]
Beginning balance, January 1	$ 0		$ 69,483
Impairments	0	$ (69,500)	(69,483)
Ending balance	$ 0	$ 0	$ 0

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Goodwill and Intangible Assets - Finite-lived Intangible Assets Roll Forward (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2019
Finite-lived Intangible Assets, Gross [Roll Forward]
Intangible assets, January 1	$ 35,240	$ 35,240
Additions	0	0
Total intangible assets, end of period	35,240	35,240
Accumulated amortization, January 1
Accumulated amortization, January 1	(27,345)	(23,956)
Current year amortization	(658)	(3,389)
Total accumulated amortization	(28,003)	(27,345)
Net intangible assets, end of period	$ 7,237	$ 7,895	$ 7,237

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Goodwill and Intangible Assets - Narrative (Details) - USD ($) $ in Thousands		3 Months Ended				12 Months Ended
	Apr. 10, 2017	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2018
Business Acquisition [Line Items]
Goodwill, impairment Loss		$ 0	$ 69,500			$ 69,483
Amortization expense				$ 658	$ 3,389
Finite-lived intangible assets, net		7,237		$ 7,237	$ 7,895
Tony Bagliore Concrete, Inc. (TBC) | Order or Production Backlog
Business Acquisition [Line Items]
Finite-lived intangibles acquired	$ 100
Acquired finite-lived intangible assets, useful life	7 months
Tony Bagliore Concrete, Inc. (TBC) | Customer Relationships
Business Acquisition [Line Items]
Finite-lived intangibles acquired	$ 700
Acquired finite-lived intangible assets, useful life	7 years
Amortization expense		700
TAS Commercial Concrete
Business Acquisition [Line Items]
Business combination, indefinite-lived intangible assets		$ 6,900
Marine
Business Acquisition [Line Items]
Goodwill, impairment Loss			33,800
Concrete
Business Acquisition [Line Items]
Goodwill, impairment Loss			$ 35,700

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Goodwill and Intangible Assets - Future Amortization Expense of Finite-lived Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
2019	$ 1,982
2020	2,069
2021	1,521
2022	1,239
2023	389
Thereafter	37
Net intangible assets, end of period	$ 7,237	$ 7,237	$ 7,895

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Accrued Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Accrued Liabilities, Current [Abstract]
Accrued salaries, wages and benefits	$ 6,010	$ 6,492
Accrual for insurance liabilities	4,034	5,680
Property taxes	871	924
Capital lease liability	0	3,045
Sales taxes	1,876	2,178
Other accrued expenses	840	521
Total accrued liabilities	$ 13,631	$ 18,840

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Long-term Debt, Line of Credit and Derivatives - Obligations under Debt Arrangements (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Mar. 31, 2019	Aug. 05, 2015
Debt Instrument [Line Items]
Debt issuance costs	$ 900
Debt issuance expense	700
Principal, current	3,000	$ 3,000
Principal, long-term	77,500	77,750
Principal	80,500	80,750
Deferred Issuance Costs, current	(54)	(50)
Deferred Issuance Costs, long-term	(1,381)	(1,258)
Deferred Issuance Costs	(1,435)	(1,308)
Net Value, current	2,946	2,950
Net Value, long-term	76,119	76,492
Total debt	79,065	79,442
Term Loan | Line of Credit
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	60,000
Total debt		$ 57,750
Revolving line of credit | Line of Credit
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	65,000		$ 100,000
Stated interest rate		5.25%
Principal, long-term	22,000	$ 23,000
Deferred Issuance Costs, long-term	(213)	(372)
Net Value, long-term	21,787	22,628
Term loan - current | Loans Payable
Debt Instrument [Line Items]
Principal, current	3,000	3,000
Deferred Issuance Costs, current	(54)	(50)
Net Value, current	2,946	2,950
Term loan - long-term | Loans Payable
Debt Instrument [Line Items]
Principal, long-term	55,500	54,750
Deferred Issuance Costs, long-term	(1,168)	(886)
Net Value, long-term	$ 54,332	$ 53,864

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Long-term Debt, Line of Credit and Derivatives - Provisions of the revolving line of credit and accordion (Details) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018	Aug. 05, 2015
Debt Instrument [Line Items]
Repayments of debt	$ 10,750,000	$ 8,375,000
Proceeds from Lines of Credit	11,000,000	$ 0
Line of Credit
Debt Instrument [Line Items]
Weighted average interest rate		4.92%
Revolving line of credit
Debt Instrument [Line Items]
Fair value of amount outstanding	23,000,000
Line of credit facility, remaining borrowing capacity	41,200,000
Repayments of debt	10,000,000
Proceeds from Lines of Credit	$ 11,000,000
Revolving line of credit | Line of Credit
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity			$ 65,000,000	$ 100,000,000
Minimum additional borrowing amount				1,000,000
Amount over minimum additional borrowing amount, integral multiples				250,000
Stated interest rate	5.25%
Revolving line of credit | Letter of Credit
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity				20,000,000
Letters of credit outstanding, amount	$ 800,000
Revolving line of credit | Bridge Loan
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity				5,000,000
Minimum additional borrowing amount				250,000
Amount over minimum additional borrowing amount, integral multiples				$ 50,000
Term Loan | Line of Credit
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity			$ 60,000,000
Fair value of amount outstanding	$ 57,800,000
Term Loan | Line of Credit | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Interest rate, effective percentage	5.25%

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Long-term Debt, Line of Credit and Derivatives - Provisions of the term loan (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Debt Instrument [Line Items]
Current portion of debt	$ 3,000
Periodic payment, principal	800
Repayments of debt	10,750	$ 8,375
Long-term debt, excluding current maturities	54,800
Term Loan | Line of Credit
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity			$ 60,000
Fair value of amount outstanding	$ 57,800
Term Loan | Line of Credit | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Interest rate, effective percentage	5.25%

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Long-term Debt, Line of Credit and Derivatives - Debt Maturity Schedule (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Total debt	$ 79,442	$ 79,065
Term Loan | Line of Credit
Debt Instrument [Line Items]
2019	2,250
2020	3,750
2021	4,500
2022	5,250
2023	42,000
Total debt	$ 57,750

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Long-term Debt, Line of Credit and Derivatives - Financial covenants (Details)	3 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Aug. 05, 2015
Debt Instrument [Line Items]
Debt instrument, covenant, fixed charge coverage ratio, maximum					1.25
Debt instrument, covenant, leverage ratio, maximum			4.75	3.00
Scenario, Forecast
Debt Instrument [Line Items]
Debt instrument, covenant, leverage ratio, maximum	3.00	4.75

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Long-term Debt, Line of Credit and Derivatives - Derivative Financial Instruments (Details) $ in Thousands	Mar. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 06, 2018 USD ($)	Mar. 31, 2018 USD ($)	Sep. 16, 2015 USD ($) contract
Debt Instrument [Line Items]
Percent of aggregate principal amount hedged			50.00%		50.00%
Interest rate swap liability	$ 336	$ 52
Swap
Debt Instrument [Line Items]
Derivative, notional amount			$ 27,000		$ 67,500
Derivative, number of instruments held (contract) | contract					5
Assets
Debt Instrument [Line Items]
Interest rate swap liability				$ 300
Liability
Debt Instrument [Line Items]
Derivatives	(400)
Liability | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring
Debt Instrument [Line Items]
Derivatives	$ 442	$ 79

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Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Operating Loss Carryforwards [Line Items]
Income tax expense (benefit)	$ 593	$ 1,489
Effective income tax rate	(8.10%)	26.60%

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(Loss) Earnings Per Share - Narrative (Details) - shares	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potential antidilutive securities excluded from future computations of earnings per share, amount (in shares)	1,748,489	1,926,288

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(Loss) Earnings Per Share - Basic and Diluted (Details) - shares	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Basic:
Basic (in shares)	28,927,406	28,143,791
Effect of dilutive securities:
Common stock options (in shares)	0	225,971
Total weighted average shares outstanding assuming dilution (in shares)	28,927,406	28,369,762
Shares of common stock issued from the exercise of stock options (in shares)	7,021	146,765

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Stock-Based Compensation (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017	May 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Approved and authorized maximum number of shares to be issued (in shares)				2,400,000
Compensation expense related to stock based awards outstanding		$ 700	$ 300
Exercise of stock options (in shares)	7,021	146,765
Proceeds received upon exercise of stock options	$ 35	$ 816
Potential antidilutive securities excluded from future computations of earnings, amount	1,748,489	1,926,288
Total unrecognized compensation expense		$ 3,200
Share-based compensation cost not yet recognized, period for recognition			2 years
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options, expiration period		10 years
Forfeiture rate		5.50%
Stock options | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options, vesting period		3 years
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Forfeiture rate		5.50%
2017 LTIP | Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Forfeiture rate		3.20%

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Commitments and Contingencies Note Receivable Details (Details)	3 Months Ended		14 Months Ended
	Mar. 31, 2019 USD ($)	Mar. 31, 2018 USD ($)	Oct. 31, 2016 USD ($) defendant	Dec. 31, 2018 USD ($)
Other Commitments [Line Items]
Other gain from continuing operations		$ 5,500,000
Notes receivable, current	$ 800,000
Notes receivables, noncurrent	2,900,000
Houston Police Department, Environmental Enforcement | Pending Litigation
Other Commitments [Line Items]
Number of defendants | defendant			2
Estimate of possible loss				$ 250,000
Settlement agreement, plea bargain declined	$ 15,000		$ 75,000

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Segment Information (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($) segment	Mar. 31, 2018 USD ($) segment	Mar. 31, 2017 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments (segment) | segment	2	2
Contract revenues	$ 143,105	$ 136,843
Marine
Segment Reporting Information [Line Items]
Contract revenues	61,487	62,791
Marine | Mexico and the Caribbean
Segment Reporting Information [Line Items]
Contract revenues		500	$ 6,000
Concrete
Segment Reporting Information [Line Items]
Contract revenues	$ 81,618	74,052
Intersegment Eliminations
Segment Reporting Information [Line Items]
Contract revenues		$ 100

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Segment Information - Summary (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Segment Reporting Information [Line Items]
Contract revenues	$ 143,105	$ 136,843
Operating (loss) income	(6,177)	7,069
Depreciation and amortization expense	(7,040)	(6,780)
Total assets	340,791		$ 312,870
Property and equipment, net of depreciation	136,841		$ 148,003
Marine
Segment Reporting Information [Line Items]
Contract revenues	61,487	62,791
Concrete
Segment Reporting Information [Line Items]
Contract revenues	81,618	74,052
Intersegment Eliminations
Segment Reporting Information [Line Items]
Contract revenues		100
Operating Segments | Marine
Segment Reporting Information [Line Items]
Contract revenues	61,487	62,791
Operating (loss) income	(6,456)	6,265
Depreciation and amortization expense	(4,946)	(4,731)
Total assets	213,162	255,484
Property and equipment, net of depreciation	118,596	127,078
Operating Segments | Concrete
Segment Reporting Information [Line Items]
Contract revenues	81,618	74,052
Operating (loss) income	279	804
Depreciation and amortization expense	(2,094)	(2,049)
Total assets	127,220	166,949
Property and equipment, net of depreciation	$ 18,245	$ 17,790

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Leases - Assets and Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Leases [Abstract]
Operating lease right-of-use assets, net of amortization	$ 22,002	$ 0
Financing lease right-of-use assets, net of amortization	8,618	0
Total assets	30,620
Current portion of operating lease liabilities	5,595	0
Current portion of financing lease liabilities	2,875	0
Total current	8,470
Operating lease liabilities	17,109	0
Financing lease liabilities	4,862	$ 0
Total noncurrent	21,971
Total liabilities	30,441
Operating lease, right-of-use asset, accumulated amortization	1,400
Finance lease, right-of-use asset, accumulated amortization	$ 4,500

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Leases - Term and Discount Rate (Details)	3 Months Ended
	Mar. 31, 2019
Leases [Abstract]
Weighted Average Remaining Lease Term, operating lease	5 years 7 months 2 days
Weighted Average Remaining Lease Term, finance lease	1 year 8 months 27 days
Weighted Average Discount Rate, operating lease	4.76%
Weighted Average Discount Rate, finance lease	5.44%

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Leases - Lease Cost (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Leases [Abstract]
Operating lease cost	$ 1,701
Short-term lease cost	68
Interest on lease liabilities	103
Amortization of right-of-use assets	569
Total lease cost	$ 2,441

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Leases - Supplemental Cash Flows (Details) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Leases [Abstract]
Operating cash flows for operating leases	$ 1,674
Operating cash flows for finance leases	103
Financing cash flows for finance leases	696,000	$ 0
ROU assets obtained in exchange for new operating lease liabilities	23,431,000
ROU assets obtained in exchange for new financing lease liabilities	$ 0

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Leases - Maturities (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Operating Leases
2019 (excluding the three months ended March 31, 2019)	$ 5,022
2020	5,614
2021	4,298
2022	2,823
2023	2,268
Thereafter	6,011
Total future minimum lease payments	26,036
Less - amount representing interest	3,332
Present value of future minimum lease payments	22,704
Less - current lease obligations	5,595	$ 0
Long-term lease obligations	17,109	0
Finance Leases
2019 (excluding the three months ended March 31, 2019)	2,783
2020	2,876
2021	2,521
2022	0
2023	0
Thereafter	0
Total future minimum lease payments	8,180
Less - amount representing interest	443
Present value of future minimum lease payments	7,737
Less - current lease obligations	2,875	0
Long-term lease obligations	$ 4,862	$ 0

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Subsequent Event (Details) - Sixth Amendment To Credit Agreement $ in Millions		3 Months Ended
	May 01, 2019 USD ($)	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019 USD ($)
Subsequent Event [Line Items]
Line of credit facility, maximum borrowing capacity						$ 50.0
Contingent additional borrowing capacity						$ 5.0
Subsequent Event
Subsequent Event [Line Items]
Interest expense, debt	$ 1.3
Debt issuance costs	$ 0.7
Scenario, Forecast
Subsequent Event [Line Items]
Leverage ratio minimum		3.00	4.00	6.25	9.50
Fixed charge coverage ratio, minimum			1.25