10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q

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

FOR THE QUARTERLY PERIOD ENDED March 31, 2021

OR

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

COMMISSION FILE NUMBER: 001-37796

Infrastructure & Energy Alternatives, Inc.

(Exact Name of Registrant as Specified in Charter)

Delaware	47-4787177
(State or Other Jurisdiction of Incorporation)	(IRS Employer Identification No.)

6325 Digital Way Suite 460 Indianapolis, Indiana	46278
(Address of Principal Executive Offices)	(Zip Code)

Registrant’s telephone number, including area code: (765) 828-2580

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading Symbols(s)	Name of exchange on which registered
Common Stock, $0.0001 par value	IEA	The NASDAQ Stock Market LLC
Warrants for Common Stock	IEAWW	The NASDAQ Stock Market LLC

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 such shorter period that the registrant was required to file such reports) and (2) has been subject to such filing requirements for the past ninety days. ☑ Yes ☐ No

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted 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 such files). ☑ Yes ☐ No

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a 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:

Large accelerated filer ☐ Accelerated filer ☐ Non-accelerated filer ☑ Smaller 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 Act). ☐ Yes ☑ No

Number of shares of Common Stock outstanding as of the close of business on May 10, 2021: 24,847,908.

	Infrastructure and Energy Alternatives, Inc.
	Table of Contents
	PART I. FINANCIAL INFORMATION
Item 1	Financial Statements (unaudited)
	Condensed Consolidated Balance Sheets	1
	Condensed Consolidated Statements of Operations and Comprehensive Income	2
	Condensed Consolidated Statements of Stockholders' Equity (Deficit)	3
	Condensed Consolidated Statements of Cash Flows	4
	Notes to Condensed Consolidated Financial Statements	6
Item 2	Management's Discussion and Analysis of Financial Condition and Results of Operations	22
Item 3	Quantitative and Qualitative Disclosures About Market Risk	36
Item 4	Controls and Procedures	36
	Part II. OTHER INFORMATION
Item 1A	Risk Factors	37
Item 5	Other Information	37
Item 6	Exhibits	37

PART I. FINANCIAL INFORMATION

ITEM 1. FINANCIAL STATEMENTS

INFRASTRUCTURE AND ENERGY ALTERNATIVES, INC.

Condensed Consolidated Balance Sheets

($ in thousands, except per share data)

(Unaudited)

	March 31, 2021		December 31, 2020
Assets
Current assets:
Cash and cash equivalents	$	95,173	$	164,041
Accounts receivable, net	171,306		163,793
Contract assets	146,696		145,183
Prepaid expenses and other current assets	46,656		19,352
Total current assets	459,831		492,369
Property, plant and equipment, net	127,264		130,746
Operating lease assets	34,994		36,461
Intangible assets, net	23,818		25,434
Goodwill	37,373		37,373
Company-owned life insurance	4,519		4,250
Deferred income taxes	4,461		2,069
Other assets	436		438
Total assets	$	692,696	$	729,140
Liabilities and Stockholder's Equity (Deficit)
Current liabilities:
Accounts payable	$	86,826	$	104,960
Accrued liabilities	116,793		129,594
Contract liabilities	141,420		118,235
Current portion of finance lease obligations	24,728		25,423
Current portion of operating lease obligations	8,779		8,835
Current portion of long-term debt	2,379		2,506
Total current liabilities	380,925		389,553
Finance lease obligations, less current portion	27,053		32,146
Operating lease obligations, less current portion	27,736		29,154
Long-term debt, less current portion	160,229		159,225
Debt - Series B Preferred Stock	175,164		173,868
Warrant obligations	9,500		9,200
Deferred compensation	8,039		8,672
Total liabilities	$	788,646	$	801,818
Commitments and contingencies:
Series A Preferred Stock, par value, $0.0001 per share; 1,000,000 shares authorized; 17,483 shares and 17,483 shares issued and outstanding at March 31, 2021 and December 31, 2020, respectively	17,483		17,483
Stockholders' equity (deficit):
Common stock, par value, $0.0001 per share; 150,000,000 and 150,000,000 shares authorized; 23,348,353 and 21,008,745 shares issued and 23,348,353 and 21,008,745 outstanding at March 31, 2021 and December 31, 2020, respectively	2		2
Additional paid in capital	32,467		35,305
Accumulated deficit	(145,902)		(125,468)
Total stockholders' deficit	(113,433)		(90,161)
Total liabilities and stockholders' deficit	$	692,696	$	729,140

See accompanying notes to condensed consolidated financial statements.

1

INFRASTRUCTURE AND ENERGY ALTERNATIVES, INC.

Condensed Consolidated Statements of Operations

($ in thousands, except per share data)

(Unaudited)

	Three Months Ended
	March 31,
	2021		2020
Revenue	$	276,412	$	358,163
Cost of revenue	259,871		325,122
Gross profit	16,541		33,041
Selling, general and administrative expenses	24,846		29,484
Loss income from operations	(8,305)		3,557
Other income (expense), net:
Interest expense, net	(14,359)		(16,065)
Other expense	(162)		(1,102)
Loss before benefit for income taxes	(22,826)		(13,610)
Benefit for income taxes	2,392		867
Net loss	$	(20,434)	$	(12,743)
Less: Convertible Preferred Stock dividends	(656)		(766)
Net loss available for common stockholders	$	(21,090)	$	(13,509)
Net loss per common share - basic	(0.91)		(0.66)
Net loss per common share - diluted	(0.91)		(0.66)
Weighted average shares - basic	23,057,731		20,522,216
Weighted average shares - diluted	23,057,731		20,522,216

See accompanying notes to condensed consolidated financial statements.

2

INFRASTRUCTURE AND ENERGY ALTERNATIVES, INC.

Condensed Consolidated Statements of Stockholders' Equity (Deficit)

($ in thousands)

(Unaudited)

	Common Stock			Additional Paid-in Capital		Treasury Stock			Accumulated Deficit		Total Equity (Deficit)
	Shares	Par Value				Shares	Cost
Balance at December 31, 2019	20,461	$	2	$	17,167	(14)	$	(76)	$	(126,196)	$	(109,103)
Net loss	—	—		—		—	—		(12,743)		(12,743)
Share-based compensation	—	—		1,113		—	—		—		1,113
Equity plan compensation	240	—		280		(38)	(84)		—		196
Series B Preferred Stock - Warrants at close	—	—		15,631		—	—		—		15,631
Series A Preferred dividends	—	—		(766)		—	—		—		(766)
Balance at March 31, 2020	20,701	$	2	$	33,425	(52)	$	(160)	$	(138,939)	$	(105,672)
Balance at December 31, 2020	21,009	$	2	$	35,305	—	$	—	$	(125,468)	$	(90,161)
Net loss	—	—		—		—	—		(20,434)		(20,434)
Earnout Shares	1,803	—		—		—	—		—		—
Share-based compensation	—	—		727		—	—		—		727
Equity plan compensation	521	—		(2,909)		—	—		—		(2,909)
Exercise of warrants	15	—		—		—	—		—		—
Series A Preferred dividends	—	—		(656)		—	—		—		(656)
Balance at March 31, 2021	23,348	$	2	$	32,467	—	$	—	$	(145,902)	$	(113,433)

See accompanying notes to condensed consolidated financial statements.

3

INFRASTRUCTURE AND ENERGY ALTERNATIVES, INC.

Condensed Consolidated Statements of Cash Flows

($ in thousands)

(Unaudited)

	Three Months Ended March 31,
	2021		2020
Cash flows from operating activities:
Net loss	$	(20,434)	$	(12,743)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	10,799		11,888
Warrant liability fair value adjustment	300		1,057
Amortization of debt discounts and issuance costs	2,859		2,237
Share-based compensation expense	727		1,113
Deferred compensation	—		(1,371)
Accrued dividends on Series B Preferred Stock	—		7,959
Deferred income taxes	(2,392)		(1,080)
Other, net	(902)		733
Change in operating assets and liabilities:
Accounts receivable	(7,513)		48,931
Contract assets	(1,513)		(14,548)
Prepaid expenses and other assets	(27,304)		(5,212)
Accounts payable and accrued liabilities	(31,593)		(104,760)
Contract liabilities	23,186		(8,381)
Net cash used in operating activities	(53,780)		(74,177)
Cash flow from investing activities:
Company-owned life insurance	(269)		599
Purchases of property, plant and equipment	(3,920)		(2,231)
Proceeds from sale of property, plant and equipment	667		1,719
Net cash (used in) provided by investing activities	(3,522)		87
Cash flows from financing activities:
Proceeds from long-term debt	—		46,000
Payments on long-term debt	(686)		(55,853)
Payments on finance lease obligations	(7,971)		(5,781)
Proceeds from issuance of Series B Preferred Stock	—		350
Proceeds of issuance of employee stock awards	—		196
Shares repurchased for tax withholding on release of restricted stock units	(2,909)		—
Net cash used in financing activities	(11,566)		(15,088)
Net change in cash and cash equivalents	(68,868)		(89,178)
Cash and cash equivalents, beginning of the period	164,041		147,259
Cash and cash equivalents, end of the period	$	95,173	$	58,081

See accompanying notes to condensed consolidated financial statements.

4

INFRASTRUCTURE AND ENERGY ALTERNATIVES, INC.

Condensed Consolidated Statements of Cash Flows

($ in thousands)

(Unaudited)

(Continued)

	Three Months Ended March 31,
	2021	2020
Supplemental disclosures:
Cash paid for interest	10,691	6,053
Cash (received) for income taxes	(290)	(229)
Schedule of non-cash activities:
Acquisition of assets/liabilities through finance lease	2,183	2,806
Acquisition of assets/liabilities through operating lease	1,101	2,732
Series A Preferred dividends declared	656	766

See accompanying notes to condensed consolidated financial statements.

5

INFRASTRUCTURE AND ENERGY ALTERNATIVES, INC.

Notes to the Condensed Consolidated Financial Statements

(unaudited)

Note 1. Business, Basis of Presentation and Significant Accounting Policies

Organization and Reportable Segments

    Infrastructure and Energy Alternatives, Inc., a Delaware corporation, is a holding company organized on August 4, 2015 (together with its wholly-owned subsidiaries, “IEA” or the “Company”). On March 26, 2018, we became a public company by consummating a merger (the “Merger”) pursuant to an Agreement and Plan of Merger, dated November 3, 2017, with M III Acquisition Corporation (“M III”).

We segregate our business into two reportable segments: the Renewables segment and the Specialty Civil segment. See Note 10. Segments for a description of the reportable segments and their operations.

Principles of Consolidation

    The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States (“GAAP”) for interim financial information and with the instructions for Quarterly Reports on Form 10-Q and Rule 10-01 of Regulation S-X. Pursuant to these rules and regulations, certain information and footnote disclosures normally included in the annual audited consolidated financial statements prepared in accordance with GAAP have been condensed or omitted. Adjustments necessary to arrive at net income (loss) available for common stockholders, previously disclosed in Note 8. Earnings Per Share, have been added to the prior period presentation of the consolidated statements of operations to be comparable with the current period presentation.

    The unaudited condensed consolidated financial statements include the accounts of IEA and its wholly-owned domestic and foreign subsidiaries. The Company occasionally forms joint ventures with unrelated third parties for the execution of single contracts or projects. The Company assesses its joint ventures to determine if they meet the qualifications of a variable interest entity (“VIE”) in accordance with Accounting Standard Codification (“ASC”) Topic 810, Consolidation. For construction joint ventures that are not VIEs or fully consolidated but for which the Company has significant influence, the Company accounts for its interest in the joint ventures using the proportionate consolidation method, see Note 11. Joint Ventures.

In the opinion of management, these financial statements reflect all adjustments (consisting of normal recurring adjustments) that are necessary to present fairly the results of operations for the interim periods presented. The results of operations for the three months ended March 31, 2021 are not necessarily indicative of the results that may be expected for the year ending December 31, 2021. These financial statements should be read in conjunction with the Company’s audited consolidated financial statements for the year ended December 31, 2020 and notes thereto included in the Company’s 2020 Annual Report on Form 10-K.

Basis of Accounting and Use of Estimates

    The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with GAAP. The preparation of the condensed consolidated financial statements in conformity with GAAP requires the use of estimates and assumptions that affect the amounts reported in the condensed consolidated financial statements and the accompanying notes. Key estimates include: the recognition of revenue and project profit or loss; fair value estimates; valuations of goodwill and intangible assets; asset lives used in computing depreciation and amortization; accrued self-insured claims; other reserves and accruals; accounting for income taxes; and the estimated impact of contingencies and ongoing litigation. While management believes that its estimates are reasonable when considered in conjunction with the Company’s consolidated financial position and results of operations, actual results could differ materially from those estimates.

Revenue Recognition

    The Company derives revenue primarily from construction projects performed under contracts for specific projects requiring the construction and installation of an entire infrastructure system or specified units within an infrastructure system. Contracts contain multiple pricing options, such as fixed price, time and materials, or unit price. Generally, renewable energy projects are performed for private customers while Specialty Civil projects are performed for various governmental entities.

6

    Revenue derived from projects billed on a fixed-price basis totaled 96.2% and 96.0% of consolidated revenue from operations for the three months ended March 31, 2021 and 2020, respectively. Revenue and related costs for contracts billed on a time and materials basis are recognized as the services are rendered. Revenue derived from projects billed on a time and materials basis totaled 3.8% and 4.0% of consolidated revenue from operations for the three months ended March 31, 2021 and 2020, respectively.

    Construction contract revenue is recognized over time using the cost-to-cost measure of progress for fixed price contracts. The cost-to-cost measure of progress best depicts the continuous transfer of control of goods or services to the customer. The contractual terms provide that the customer compensates the Company for services rendered.

    Contract costs include all direct materials, labor and subcontracted costs, as well as indirect costs related to contract performance, such as indirect labor, supplies, tools, repairs and the costs of capital equipment. The cost estimation and review process for recognizing revenue over time under the cost-to-cost method is based on the professional knowledge and experience of the Company’s project managers, engineers and financial professionals. Management reviews estimates of total contract transaction price and total project costs on an ongoing basis. Changes in job performance, job conditions and management’s assessment of expected variable consideration are factors that influence estimates of the total contract transaction price, total costs to complete those contracts and profit recognition. Changes in these factors could result in revisions to revenue and costs of revenue in the period in which the revisions are determined on a prospective basis, which could materially affect the Company’s results of operations for that period. Provisions for losses on uncompleted contracts are recorded in the period in which such losses are determined.

Performance Obligations

    A performance obligation is a contractual promise to transfer a distinct good or service to the customer and is the unit of account under ASC Topic 606. The transaction price of a contract is allocated to distinct performance obligations and recognized as revenue when or as the performance obligations are satisfied. The Company’s contracts often require significant integrated services and, even when delivering multiple distinct services, are generally accounted for as a single performance obligation. Contract amendments and change orders are generally not distinct from the existing contract due to the significant integrated service provided in the context of the contract and are accounted for as a modification of the existing contract and performance obligation. With the exception of certain Specialty Civil service contracts, the majority of the Company’s performance obligations are generally completed within one year.

    When more than one contract is entered into with a customer on or close to the same date, the Company evaluates whether those contracts should be combined and accounted for as a single contract as well as whether those contracts should be accounted for as more than one performance obligation. This evaluation requires significant judgment and is based on the facts and circumstances of the various contracts, which could change the amount of revenue and profit recognition in a given period depending upon the outcome of the evaluation.

    Remaining performance obligations represent the amount of unearned transaction prices for contracts, including approved and unapproved change orders. As of March 31, 2021, the amount of the Company’s remaining performance obligations was $1,627.5 million. The Company expects to recognize approximately 67.7% of its remaining performance obligations as revenue during the next twelve months. Revenue recognized from performance obligations satisfied in previous periods was $0.4 million and $(2.0) million for the three months ended March 31, 2021 and 2020, respectively.

Variable Consideration

    Transaction pricing for the Company’s contracts may include variable consideration, such as unapproved change orders, claims, incentives and liquidated damages. Management estimates variable consideration for a performance obligation utilizing estimation methods that best predict the amount of consideration to which the Company will be entitled. Variable consideration is included in the estimated transaction price to the extent it is probable that a significant reversal of cumulative revenue recognized will not occur when the uncertainty associated with the variable consideration is resolved. Management’s estimates of variable consideration and determination of whether to include estimated amounts in transaction price are based on legal opinions, past practices with the customer, specific discussions, correspondence or preliminary negotiations with the customer and all other relevant information that is reasonably available. The effect of a change in variable consideration on the transaction price of a performance obligation is typically recognized as an adjustment to revenue on a cumulative catch-up basis. To the extent unapproved change orders, claims and liquidated damages reflected in transaction price are not resolved in the Company’s favor, or to the extent incentives reflected in transaction price are not earned, there could be reductions in, or reversals of, previously recognized revenue.

    As of March 31, 2021 and December 31, 2020, the Company included approximately $42.8 million and $52.6 million, respectively, of unapproved change orders and/or claims in the transaction price for certain contracts that were in the process of

7

being resolved in the normal course of business, including through negotiation, arbitration and other proceedings. These transaction price adjustments are included within Contract Assets or Contract Liabilities as appropriate. The Company actively engages with its customers to complete the final change order approval process, and generally expects these processes to be completed within one year. Amounts ultimately realized upon final acceptance by customers could be higher or lower than such estimated amounts.

Disaggregation of Revenue

    The following tables disaggregate revenue by customers and services performed, which the Company believes best depicts the nature, amount, timing and uncertainty of its revenue:

(in thousands)	Three Months Ended
	March 31, 2021		March 31, 2020
Renewables Segment
Wind	$	146,858	$	248,537
Solar	33,516		209
	$	180,374	$	248,746
Specialty Civil Segment
Heavy civil	$	48,871	$	41,222
Rail	26,868		47,057
Environmental	20,299		21,138
	$	96,038	$	109,417

Concentrations

    The Company had the following approximate revenue and accounts receivable concentrations, net of allowances, for the periods ended:

	Revenue %
	Three Months Ended			Accounts Receivable %
	March 31, 2021	March 31, 2020		March 31, 2021	December 31, 2020
Company A (Renewables Segment)	*	11.5	%	*	*
Company B (Renewables Segment)	*	11.1	%	*	*

* Amount was not above 10% threshold

Construction Joint Ventures

Certain contracts are executed through joint ventures. The arrangements are often formed for the execution of single contracts or projects and allow the Company to share risks and secure specialty skills required for project execution.

In accordance with ASC Topic 810, Consolidation the Company assesses its joint ventures at inception to determine if any meet the qualifications of a VIE. The Company considers a joint venture a VIE if either (a) the total equity investment is not sufficient to permit the entity to finance its activities without additional subordinated financial support, (b) characteristics of a controlling financial interest are missing (either the ability to make decisions through voting or other rights, the obligation to absorb the expected losses of the entity or the right to receive the expected residual returns of the entity), or (c) the voting rights of the equity holders are not proportional to their obligations to absorb the expected losses of the entity and/or their rights to receive the expected residual returns of the entity and substantially all of the entity’s activities either involve or are conducted on behalf of an investor that has disproportionately few voting rights. Upon the occurrence of certain events outlined in ASC 810, the Company reassesses its initial determination of whether the joint venture is a VIE.

The Company also evaluates whether it is the primary beneficiary of each VIE and consolidates the VIE if the Company has both (a) the power to direct the economically significant activities of the entity and (b) the obligation to absorb

8

losses of, or the right to receive benefits from, the entity that could potentially be significant to the VIE. The Company considers the contractual agreements that define the ownership structure, distribution of profits and losses, risks, responsibilities, indebtedness, voting rights and board representation of the respective parties in determining whether it qualifies as the primary beneficiary. The Company also considers all parties that have direct or implicit variable interests when determining whether it is the primary beneficiary. When the Company is determined to be the primary beneficiary, the VIE is consolidated. In accordance with ASC 810, management’s assessment of whether the Company is the primary beneficiary of a VIE is performed continuously.

Construction joint ventures that do not involve a VIE, or for which the Company is not the primary beneficiary, are evaluated for consolidation under the voting interest model that considers whether the Company owns or controls more than 50% of the voting interest in the joint venture. For construction joint ventures that are not consolidated but for which the Company has significant influence, the Company accounts for its interest in the joint ventures using the proportionate consolidation method, whereby the Company’s proportionate share of the joint ventures’ assets, liabilities, revenue and cost of operations are included in the appropriate classifications in the Company’s consolidated financial statements. See Note 11. Joint Ventures for additional discussion regarding joint ventures.

Recently Adopted Accounting Standards - Guidance Adopted in 2020

In December 2019, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2019-12, “Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes,” which removes certain exceptions to the general principles in Topic 740 and also clarifies and amends existing guidance to improve consistent application. This ASU is effective for fiscal years beginning after December 15, 2020, and interim periods within those fiscal years. Depending on the amendment, adoption may be applied on the retrospective, modified retrospective, or prospective basis. The Company adopted the standard on January 1, 2021 on a prospective basis, which did not have an impact on our disclosures for income taxes.

Recently Issued Accounting Standards Not Yet Adopted

    In June 2016, the FASB issued ASU 2016-13, “Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments,” which introduced an expected credit loss methodology for the measurement and recognition of credit losses on most financial assets, including trade accounts receivables. The expected credit loss methodology under ASU 2016-13 is based on historical experience, current conditions and reasonable and supportable forecasts, and replaces the probable/incurred loss model for measuring and recognizing expected losses under current GAAP. The ASU also requires disclosure of information regarding how a company developed its allowance, including changes in the factors that influenced management’s estimate of expected credit losses and the reasons for those changes. The ASU and its related clarifying updates are effective for smaller reporting companies for fiscal years beginning after December 15, 2022, and interim periods within those fiscal years, with early adoption permitted. The Company is still evaluating the new standard but do not expect it to have a material impact on our estimate of the allowance for uncollectable accounts.

Management has evaluated other recently issued accounting pronouncements and does not believe that they will have a significant impact on the financial statements and related disclosures.

COVID-19 Pandemic

    During March 2020, the World Health Organization declared a global pandemic related to the rapidly growing outbreak of a novel strain of coronavirus (“COVID-19”). The COVID-19 pandemic has significantly affected economic conditions in the United States and internationally as national, state and local governments reacted to the public health crisis by requiring mitigation measures that have disrupted business activities for an uncertain period of time.

The Company believes that the COVID-19 pandemic has not had a material adverse impact on the Company’s financial results for the period ended March 31, 2021. Currently, most of the Company’s construction services are deemed essential under governmental mitigation orders and all of our business segments continue to operate. The Company has issued several notices of force majeure for the purpose of recognizing delays in construction schedules due to COVID-19 outbreaks on certain of its work sites and has also received notices of force majeure from the owners of certain projects and certain subcontractors. Management does not believe that any delays on projects related to these events of force majeure will have a material impact on its results of operations.

Management’s top priority has been to take appropriate actions to protect the health and safety of the Company's employees, customers and business partners, including adjusting the Company's standard operating procedures to respond to

9

evolving health guidelines. Management believes that it is taking appropriate steps to mitigate any potential impact to the Company; however, given the uncertainty regarding the potential effects of the COVID-19 pandemic, any future impacts cannot be quantified or predicted with specificity.

The effects of the COVID-19 pandemic could affect the Company’s future business activities and financial results, including new contract awards, reduced crew productivity, contract amendments or cancellations, higher operating costs or delayed project start dates or project shutdowns that may be requested or mandated by governmental authorities or others.

Note 2. Contract Assets and Liabilities

    The timing of when we bill our customers is generally dependent upon agreed-upon contractual terms, milestone billings based on the completion of certain phases of the work, or when services are provided. Sometimes, billing occurs subsequent to revenue recognition, resulting in unbilled revenue, which is accounted for as a contract asset. Sometimes we receive advance payments or deposits from our customers before revenue is recognized, resulting in deferred revenue, which is accounted for as a contract liability.

    Contract assets in the Condensed Consolidated Balance Sheets represent the following:

•costs and estimated earnings in excess of billings, which arise when revenue has been recorded but the amount has not been billed; and

•retainage amounts for the portion of the contract price billed by us for work performed but held for payment by the customer as a form of security until we reach certain construction milestones or complete the project.

    Contract assets consisted of the following:

(in thousands)	March 31, 2021		December 31, 2020
Costs and estimated earnings in excess of billings on uncompleted contracts	$	60,132	$	51,367
Retainage receivable	86,564		93,816
	$	146,696	$	145,183

    Contract liabilities consist of the following:

(in thousands)	March 31, 2021		December 31, 2020
Billings in excess of costs and estimated earnings on uncompleted contracts	$	141,231	$	117,641
Loss on contracts in progress	189		594
	$	141,420	$	118,235

    Revenue recognized for the three months ended March 31, 2021 that was included in the contract liability balance at December 31, 2020 was approximately $87.8 million.

    Activity in the allowance for doubtful accounts for the periods indicated was as follows:

	Three Months Ended
	March 31,
(in thousands)	2021		2020
Allowance for doubtful accounts at beginning of period	$	—	$	75
Plus: provision for (reduction in) allowance	—		14
Less: write-offs, net of recoveries	—		—
Allowance for doubtful accounts at period end	$	—	$	89

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Note 3. Property, Plant and Equipment, Net

    Property, plant and equipment consisted of the following:

(in thousands)	March 31, 2021		December 31, 2020
Buildings and leasehold improvements	$	4,890	$	4,402
Land	17,600		17,600
Construction equipment	197,057		192,402
Office equipment, furniture and fixtures	3,637		3,620
Vehicles	7,426		7,326
	230,610		225,350
Accumulated depreciation	(103,346)		(94,604)
Property, plant and equipment, net	$	127,264	$	130,746

    Depreciation expense of property, plant and equipment was $9,183 and $8,516 for the three months ended March 31, 2021 and 2020, respectively.

Note 4. Goodwill and Intangible Assets, Net

    The following table provides the changes in the carrying amount of goodwill, by segment:

(in thousands)	Renewables		Specialty Civil		Total
January 1, 2020	$	3,020	$	34,353	$	37,373
Adjustments	—		—		—
December 31, 2020	$	3,020	$	34,353	$	37,373
Adjustments	—		—		—
March 31, 2021	$	3,020	$	34,353	$	37,373

Intangible assets consisted of the following as of the dates indicated:

	March 31, 2021							December 31, 2020
($ in thousands)	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Weighted Average Remaining Life	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Weighted Average Remaining Life
Customer relationships	$	26,500	$	(9,427)	$	17,073	4.75 years	$	26,500	$	(8,481)	$	18,019	5 years
Trade name	13,400		(6,655)		6,745		2.75 years	13,400		(5,985)		7,415		3 years
	$	53,800	$	(29,982)	$	23,818		$	53,800	$	(28,366)	$	25,434

Amortization expense associated with intangible assets for the three months ended March 31, 2021 and 2020, totaled $1.6 million and $3.4 million, respectively.

    The following table provides the annual intangible amortization expense currently expected to be recognized for the years 2021 through 2025:

(in thousands)	Remainder of 2021		2022		2023		2024		2025
Amortization expense	$	4,849	$	6,466	$	5,841	$	3,785	$	2,876

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Note 5. Fair Value of Financial Instruments

    The Company applies ASC Topic 820, Fair Value Measurement, which establishes a framework for measuring fair value. ASC 820 defines fair value as an exit price, which is the price that would be received for an asset or paid to transfer a liability in the Company’s principal or most advantageous market in an orderly transaction between market participants on the measurement date. The fair value hierarchy established in ASC 820 generally requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. Observable inputs reflect the assumptions that market participants would use in pricing the asset or liability and are developed based on market data obtained from sources independent of the reporting entity. Unobservable inputs reflect the entity’s own assumptions based on market data and the entity’s judgments about the assumptions that market participants would use in pricing the asset or liability and are developed based on the best information available in the circumstances.

    The valuation hierarchy is composed of three levels. The classification within the valuation hierarchy is based on the lowest level of input that is significant to the fair value measurement. The levels within the valuation hierarchy are described below:

Level 1 — Inputs to the fair value measurement are observable inputs, such as quoted prices in active markets for identical assets or liabilities listed on active market exchanges.

Level 2 — Inputs to the fair value measurement are determined using prices for recently traded assets and liabilities with similar underlying terms, as well as direct or indirect observable inputs, such as interest rates and yield curves that are observable at commonly quoted intervals.

Level 3 — Inputs to the fair value measurement are unobservable inputs, such as estimates, assumptions, and valuation techniques when little or no market data exists for the assets or liabilities.

    The following table sets forth information regarding the Company's liabilities measured at fair value on a recurring basis:    

	March 31, 2021								December 31, 2020
(in thousands)	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Liabilities
Private warrants	$	—	$	1,000	$	—	$	1,000	$	—	$	—	$	—	$	—
Series B Preferred Stock - Anti-dilution warrants	—		—		8,100		8,100		—		—		8,800		8,800
Series B-1 Preferred Stock - Performance warrants	—		—		400		400		—		—		400		400
Total liabilities	$	—	$	1,000	$	8,500	$	9,500	$	—	$	—	$	9,200	$	9,200

The following is a reconciliation of the beginning and ending balances of recurring fair value measurements using Level 3 inputs:

(in thousands)	Series B Preferred Stock - Anti-dilution warrants		Series B-1 Preferred Stock - Performance warrants
Beginning Balance, December 31, 2020	$	8,800	$	400
Fair value adjustment - loss (gain) recognized in other income	(700)		—
Ending Balance, March 31, 2021	$	8,100	$	400

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In 2019, the Company entered into three equity purchase agreements and issued Series B Preferred Stock as discussed in Note 6. Debt and Series B Preferred Stock. The agreements require that on the conversion of any of the Convertible Series A Preferred Stock to common shares, the Series B Preferred Stock will receive additional warrants (Anti-dilution Warrants) to purchase common shares at a price of $0.0001 per share. The agreements also require that if the Company fails to meet a certain Adjusted EBITDA (as that term is defined in the agreements) threshold on a trailing twelve-month basis from May 31, 2020 through April 30, 2021, the Series B Preferred Stock will receive additional warrants (Performance Warrants) to purchase common shares at $0.0001 per share. On May 20, 2019, the conversion rights for the Series A Preferred Stock were amended to allow the holders of Series A Preferred Stock to convert all or any portion of Series A Preferred Stock outstanding into common stock at any point in time.

    The information below describes the balance sheet classification and the recurring fair value measurement for these requirements:

Private Warrants (recurring) - The Company has 295,000 private warrants that are not actively traded on the public markets and the Company adjusts the fair value at the end of each fiscal period using the price on that date multiplied by the remaining private warrants. The Private warrants were recorded as Warrant obligations at the end of the quarter and the fair value adjustment was recorded as other expense for the three months ended March 31, 2021. For further discussion see Note 8. Earnings Per Share.

    Series B Preferred Stock - Anti-dilution Warrants (recurring) - The number of common shares attributable to the warrants issued to Series B Preferred Stockholders upon conversion by Series A Preferred Stockholders is determined on a 30-day volume weighted average. The Anti-dilution warrant liability was valued using the stock price at the end of the quarter and were recorded as a liability.

    Series B-1 Preferred Stock - Performance Warrants (recurring) - The warrant liability was recorded at fair value as a liability, using a Monte Carlo Simulation based on certain significant unobservable inputs, such as a risk rate premium, Adjusted EBITDA volatility, stock price volatility and projected Adjusted EBITDA for the Company.

    Other financial instruments of the Company not listed in the table consist of cash and cash equivalents, accounts receivable, accounts payable and other current liabilities that approximate their fair values. Additionally, management believes that the outstanding recorded balance on the line of credit and long-term debt, approximates fair value due to their floating interest rates.

Note 6. Debt and Series B Preferred Stock

    Debt consisted of the following obligations as of:

(in thousands)	March 31, 2021		December 31, 2020
Term loan	$	173,345	$	173,345
Commercial equipment notes	4,897		5,582
Total principal due for long-term debt	178,242		178,927
Unamortized debt discount and issuance costs	(15,634)		(17,196)
Less: Current portion of long-term debt	(2,379)		(2,506)
Long-term debt, less current portion	$	160,229	$	159,225
Debt - Series B Preferred Stock	$	185,998	$	185,396
Unamortized debt discount and issuance costs	(10,834)		(11,528)
Long-term Series B Preferred Stock	$	175,164	$	173,868

The weighted average interest rate for the term loan as of March 31, 2021 and December 31, 2020, was 6.95% and 7.00%, respectively.

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Debt Covenants

    The term loan is governed by the terms of the Third A&R Credit Agreement, dated May 2019, which include customary affirmative and negative covenants and provide for customary events of default, including, nonpayment of principal or interest and failure to timely deliver financial statements. Under the Third A&R Credit Agreement, the financial covenant provides that the First Lien Net Leverage Ratio (as defined therein) may not exceed 2.75:1.0, for the four fiscal quarters ending December 31, 2021, and for all subsequent quarters, 2.25:1.0.

    The Third A&R Credit Agreement also includes certain limitations on the payment of cash dividends on the Company's common shares and provides for other restrictions on (subject to certain exceptions) liens, indebtedness (including guarantees and other contingent obligations), investments (including loans, advances and acquisitions), mergers and other fundamental changes and sales and other dispositions of property or assets, among others.

Debt - Series B Preferred Stock

The Series B Preferred Stock is a mandatorily redeemable financial instrument under ASC Topic 480 and has been recorded as a liability using the effective interest rate method for each tranche. The mandatory redemption date for all tranches of the Series B Preferred Stock is February 15, 2025.

The Series B Preferred Stock requires quarterly dividend payments calculated at a 12% annual rate on all outstanding Series B Preferred Stock when the Company’s First Lien Net Leverage Ratio (as defined in the Third A&R Credit Agreement) is less than or equal to 1.50:1.0 and a 13.5% rate if the ratio if greater. The Series B Preferred Stock agreements allow the Company to accrue, but not pay, the dividends at a 15.0% annual rate. Accrued dividends increase the amount of Series B Preferred Stock. Accrued dividends were $18.3 million at March 31, 2021 and December 31, 2020, respectively. Dividend payments are not deductible in calculating the Company’s federal and state income taxes.

Contractual Maturities

    Contractual maturities of the Company's outstanding principal on debt obligations as of March 31, 2021:

(in thousands)	Maturities
Remainder of 2021	$	1,821
2022	16,938
2023	29,986
2024	129,368
2025	129
Thereafter	—
Total contractual maturities	$	178,242

Note 7. Commitments and Contingencies

    In the ordinary course of business, the Company enters into agreements that provide financing for its machinery and equipment, facility and vehicle needs. The Company reviews these agreements for potential lease classification, and at inception, determines whether a lease is an operating or finance lease. Lease assets and liabilities, which generally represent the present value of future minimum lease payments over the term of the lease, are recognized as of the commencement date. Under Topic 842, leases with an initial lease term of twelve months or less are classified as short-term leases and are not recognized in the condensed consolidated balance sheets unless the lease contains a purchase option that is reasonably certain to be exercised.

    Lease term, discount rate, variable lease costs and future minimum lease payment determinations require the use of judgment as these are based on the facts and circumstances related to each specific lease. Lease terms are generally based on their initial non-cancelable terms, unless there is a renewal option that is reasonably certain to be exercised. Various factors, including economic incentives, intent, past history and business need are considered to determine if a renewal option is reasonably certain to be exercised. The implicit rate in a lease agreement is used when it can be determined. Otherwise, the Company's incremental borrowing rate, which is based on information available as of the lease commencement date, including applicable lease terms and the current economic environment, is used to determine the value of the lease obligation.

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Finance Leases

    The Company has obligations, exclusive of associated interest, under various finance leases for equipment totaling $51.8 million and $57.6 million at March 31, 2021 and December 31, 2020, respectively. Gross property under this capitalized lease agreement at March 31, 2021 and December 31, 2020, totaled $129.7 million and $128.0 million, less accumulated depreciation of $60.7 million and $55.1 million, respectively, for net balances of $69.0 million and $72.9 million, respectively. Depreciation expense for assets held under the finance leases is included in cost of revenue in the condensed consolidated statements of operations.

    The future minimum payments of finance lease obligations are as follows:

(in thousands)
Remainder of 2021	$	19,994
2022	21,996
2023	7,267
2024	3,264
2025	1,799
Thereafter	78
Future minimum lease payments	54,398
Less: Amount representing interest	(2,617)
Present value of minimum lease payments	51,781
Less: Current portion of finance lease obligations	24,728
Finance lease obligations, less current portion	$	27,053

Operating Leases

    In the ordinary course of business, the Company enters into non-cancelable operating leases for certain of its facilities, vehicles and equipment. The Company has obligations, exclusive of associated interest, totaling $36.5 million and $38.0 million at March 31, 2021 and December 31, 2020, respectively. Property under these operating lease agreements at March 31, 2021 and December 31, 2020, totaled $35.0 million and $36.5 million, respectively.

    The Company has long-term power-by-the-hour equipment rental agreements with a construction equipment manufacturer that have a guaranteed minimum monthly hour requirement. The minimum guaranteed amount based on the Company's current operations is $3.2 million per year. Total expense under these agreements are listed in the following table as variable lease costs.

    The future minimum payments under non-cancelable operating leases are as follows:

(in thousands)
Remainder of 2021	$	8,435
2022	9,753
2023	7,347
2024	3,532
2025	1,751
Thereafter	18,899
Future minimum lease payments	49,717
Less: Amount representing interest	(13,202)
Present value of minimum lease payments	36,515
Less: Current portion of operating lease obligations	8,779
Operating lease obligations, less current portion	$	27,736

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Lease Information

	Three Months Ended
	March 31, 2021			March 31, 2020
Finance Lease cost:
Amortization of right-of-use assets	$	5,835		$	5,697
Interest on lease liabilities	817			1,186
Operating lease cost	3,394			3,478
Short-term lease cost	23,604			21,635
Variable lease cost	1,247			960
Sublease Income	(33)			(33)
Total lease cost	$	34,864		$	32,923
Other information:
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from finance leases	$	817		$	1,186
Operating cash flows from operating leases	$	3,245		$	3,342
Weighted-average remaining lease term - finance leases	2.41 years			2.73 years
Weighted-average remaining lease term - operating leases	8.17 years			8.02 years
Weighted-average discount rate - finance leases	6.18		%	6.49		%
Weighted-average discount rate - operating leases	7.00		%	7.14		%

Letters of Credit and Surety Bonds

    In the ordinary course of business, the Company is required to post letters of credit and surety bonds to customers in support of performance under certain contracts. Such letters of credit are generally issued by a bank or similar financial institution. The letter of credit or surety bond commits the issuer to pay specified amounts to the holder of the letter of credit or surety bond under certain conditions. If the letter of credit or surety bond issuer were required to pay any amount to a holder, the Company would be required to reimburse the issuer, which, depending upon the circumstances, could result in a charge to earnings. As of March 31, 2021, and December 31, 2020, the Company was contingently liable under letters of credit issued under its Third A&R Credit Agreement, in the amount of $22.0 million and $7.8 million, respectively, related to projects and insurance. In addition, as of March 31, 2021 and December 31, 2020, the Company had outstanding surety bonds on projects of $3.0 billion and $2.8 billion, respectively.

Note 8. Earnings Per Share

    The Company calculates earnings (loss) per share (“EPS”) in accordance with ASC Topic 260, Earnings per Share. Basic EPS is computed by dividing income (loss) available to common stockholders by the weighted average number of common shares of common stock outstanding during the period.

    Income (loss) available to common stockholders is computed by deducting the dividends accrued for the period on cumulative preferred stock from net income and net income allocated to participating securities. If there is a net loss, the amount of the loss is increased by those preferred dividends.

    Diluted EPS assumes the dilutive effect of (i) Series A cumulative convertible preferred stock, using the if-converted method, (ii) publicly traded warrants, (iii) Series B Preferred Stock - Warrants and (iv) the assumed exercise of in-the-money stock options and the assumed vesting of outstanding restricted stock units (“RSUs”), using the treasury stock method.

    Whether the Company has net income, or a net loss determines whether potential issuances of common stock are included in the diluted EPS computation or whether they would be anti-dilutive. As a result, if there is a net loss, diluted EPS is

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computed in the same manner as basic EPS is computed. Similarly, if the Company has net income but its preferred dividend adjustment made in computing income available to common stockholders results in a net loss available to common stockholders, diluted EPS would be computed the same as basic EPS.

The calculations of basic and diluted EPS, are as follows:

	Three Months Ended
	March 31,
($ in thousands, except per share data)	2021		2020
Numerator:
Net loss	$	(20,434)	$	(12,743)
Less: Convertible Preferred Stock dividends	(656)		(766)
Net loss available to common stockholders	(21,090)		(13,509)
Denominator:
Weighted average common shares outstanding - basic and diluted	23,057,731		20,522,216
Anti-dilutive:
Convertible Series A Preferred	1,628,269		6,553,041
Merger Warrants (1)	3,074,481		—
Series B Preferred - Warrants (2)	7,684,057		7,675,325
Options (3)	426,824		—
RSUs (3)	1,958,045		1,456,359
Basic EPS	(0.91)		(0.66)
Diluted EPS	(0.91)		(0.66)

(1)     As of March 31, 2020, Merger Warrants to purchase 8,480,000 shares of common stock at $11.50 per share were not considered as dilutive as the warrants’ exercise price was not greater than the average market price of the common stock during the period. As of March 31, 2021, these warrants were calculated using the treasury stock method and were anti-dilutive.

(2)     Series B Preferred - Warrants are considered as participating securities because the holders are entitled to participate in any distributions similar to that of common shareholders.

(3)    As of March 31, 2020, there were 591,860 of vested and unvested options and 141,248 unvested RSUs, respectively. These were also not considered as dilutive as the respective exercise price or average stock price required for vesting of such awards was greater than the average market price of the common stock during the period.    

Merger Warrants

On August 4, 2015, M III formed a Special Purpose Acquisition Corporation and issued public and private warrants before the Merger with the Company. As of March 31, 2021, the Company had 16,925,160 Merger Warrants outstanding, of which 295,000 are considered private warrants. Two Merger Warrants, such warrants will be exercisable for one share of our Common Stock at $11.50 per share until the expiration on March 26, 2023. For further discussion about the valuation of the private warrants see Note 5. Fair Value of Financial Instruments.

Series B Preferred Stock Anti-dilution Warrants

The Company also had the following potential outstanding warrants related to the Series B Preferred Stock issuance.

•At March 31, 2021, a total of 495,762 warrants calculated on an if-converted method for the conversion                 of shares related to the outstanding Series A Preferred Stock. As discussed in Note 5. Fair Value of Financial

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Instruments, these warrants are recorded as a liability. These warrants are not included in the weighted average share calculation as the contingent event (conversion of Series A Preferred Stock) had not occurred at the end of the quarter.

•The second set of additional warrants would be issued if the exercise of any warrant with an exercise price of $11.50 or higher.

•The final set of additional warrants would be issued if the exercise of any equity issued pursuant to the Company’s long term incentive plan or other equity plan with a strike price of $11.50 or higher.

Series A Preferred Stock

    As of March 31, 2021, we had 17,483 shares of Series A Preferred Stock with a stated value of $1,000 per share plus accumulated dividends. Dividends are paid on the Series A Preferred Stock as, if and when declared by our Board. To extent permitted, dividends are required to be paid in cash quarterly in arrears on each March 31, June 30, September 30 and December 31 on the stated value at a rate of 10% per annum.

    If not paid in cash, dividends will accrue on the stated value and will increase the stated value on and effective as of the applicable dividend date without any further action by the Board at 12% per annum.

    So long as any shares of Series B Preferred Stock of the Company are currently outstanding or from and after the occurrence of any non-payment event or default event and until cured or waived, the foregoing rates will increase by 2% per annum.

    As of March 31, 2021, the Company has accrued a cumulative of $5.0 million in dividends to the holder of Series A Preferred Stock as a reduction to additional paid-in capital.

Stock Compensation

    Under guidance of ASC Topic 718 “Compensation — Stock Compensation,” stock-based compensation expense is measured at the date of grant, based on the calculated fair value of the stock-based award, and is recognized as an expense over the employee’s requisite service period (generally the vesting period of the award).

    The fair value of the RSUs was based on the closing market price of our common stock on the date of the grant. Stock compensation expense for the RSUs is being amortized using the straight-line method over the service period. For the three months ended March 31, 2021 and 2020, we recognized $0.7 million and $1.1 million in compensation expense, respectively.

Note 9. Income Taxes

    The Company’s statutory federal tax rate was 21.00% for the periods ended March 31, 2021 and 2020, respectively. State tax rates for the same period vary among states and range from approximately 0.8% to 12.0%. A small number of states do not impose an income tax.

    The effective tax rates for the three months ended March 31, 2021 and 2020 were 10.5% and 6.4%, respectively. The difference between the Company’s effective tax rate and the federal statutory rate primarily results from permanent differences related to the interest accrued for the Series B Preferred Stock and executive compensation, which are not deductible for federal and state income taxes. There were no changes in uncertain tax positions during the periods ended March 31, 2021 and 2020.

    On March 27, 2020, the Coronavirus Aid, Relief, and Economic Security Act (the “CARES Act”) was enacted by the US Government in response to the COVID-19 pandemic to provide employment retention incentives. We do not believe that these relief measures materially affect the condensed consolidated financial statements for the last three quarters of 2020.

The Company has also made use of the payroll deferral provision to defer social security tax of approximately $13.6 million through December 31, 2020. Half of this amount is required to be paid on December 31, 2021 and the other half by December 31, 2022.

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Note 10. Segments

    We operate our business as two reportable segments: the Renewables segment and the Specialty Civil segment. Each of our reportable segments is comprised of similar business units that specialize in services unique to their respective markets. The classification of revenue and gross profit for segment reporting purposes can at times require judgment on the part of management. Our segments may perform services across industries or perform joint services for customers in multiple industries. To determine reportable segment gross profit, certain allocations, including allocations of shared and indirect costs, such as facility costs, equipment costs and indirect operating expenses, were made based on segment revenue.

    Separate measures of the Company’s assets, including capital expenditures and cash flows by reportable segment are not produced or utilized by management to evaluate segment performance. A substantial portion of the Company’s fixed assets are owned by and accounted for in our equipment department, including operating machinery, equipment and vehicles, as well as office equipment, buildings and leasehold improvements, and are used on an interchangeable basis across our reportable segments. As such, for reporting purposes, total under/over absorption of equipment expenses consisting primarily of depreciation is allocated to the Company's two reportable segments based on segment revenue.

The following is a brief description of the Company's reportable segments:

Renewables Segment

    The Renewables segment operates throughout the United States and specializes in a range of services for the power delivery, solar, wind and battery storage markets that includes design, procurement, construction, restoration, and maintenance.

Specialty Civil Segment

    The Specialty Civil segment operates throughout the United States and specializes in a range of services that include:

•Heavy civil construction services such as road and bridge construction, specialty paving, sports field development, industrial maintenance, outsourced contract mining and heavy hauling.

•Environmental remediation services such as site development, environmental site closure, and coal ash management.

•Rail infrastructure services such as planning, design, procurement, construction and maintenance of major railway and intermodal facilities.

Segment Revenue

    Revenue by segment was as follows:

	Three Months Ended March 31,
(in thousands)	2021				2020
Segment	Revenue		% of Total Revenue		Revenue		% of Total Revenue
Renewables	$	180,374	65.3	%	$	248,746	69.5	%
Specialty Civil	96,038		34.7	%	109,417		30.5	%
Total revenue	$	276,412	100.0	%	$	358,163	100.0	%

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Segment Gross Profit

    Gross profit by segment was as follows:

	Three Months Ended March 31,
(in thousands)	2021				2020
Segment	Gross Profit		Gross Profit Margin		Gross Profit		Gross Profit Margin
Renewables	$	12,180	6.8	%	$	25,829	10.4	%
Specialty Civil	4,361		4.5	%	7,212		6.6	%
Total gross profit	$	16,541	6.0	%	$	33,041	9.2	%

Note 11. Joint Ventures

As of March 31, 2021, the Company did not have any VIEs but did have one joint venture that used the proportionate consolidation method at 25% ownership. The following balances were included in the condensed consolidated financial statements:

(in thousands)	March 31, 2021
Assets
Cash	$	5,455
Accounts receivable	3,963
Contract assets	1,446
Liabilities
Accounts payable	$	3,461
Contract liabilities	7,403
	Three Months Ended
	March 31, 2021
Revenue	$	4,501
Cost of revenue	4,501

Note 12. Related Party Transactions

On February 9, 2021, Ares Management, LLC, on behalf of its affiliated funds, investment vehicles and/or managed accounts (“Ares”) purchased the outstanding Series B Preferred Stock and Series A Preferred Stock from funds managed by Oaktree Capital Management (“Oaktree”). As of March 31, 2021, Ares currently holds all of the outstanding Series B Preferred Stock, except for 350 shares, and all of the outstanding Series A Preferred Stock.

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Related Party Shareholders

Type of Equity	Holder	Ownership Percentage
Series A Preferred Stock and Series A Conversion Warrants	Ares	100	%
Series B-1 Preferred Stock, Performance Warrants, Warrants at Closing (initial amount issued)	Ares	100	%
Series B-1 Warrants at Closing (initial amount issued), Exchange Warrants	Oaktree Power Opportunities Fund III Delaware, L.P.	100	%
Series B-2 and B-3 Preferred Stock, Warrants at Closing	Ares	100	%

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ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

Forward-Looking Statements

    This Quarterly Report on Form 10-Q contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended (the “Securities Act”) and Section 21E of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). The forward-looking statements can be identified by the use of forward-looking terminology including “may,” “should,” “likely,” “will,” “believe,” “expect,” “anticipate,” “estimate,” “forecast,” “seek,” “target,” “continue,” “plan,” “intend,” “project,” or other similar words. All statements, other than statements of historical fact included in this Quarterly Report, regarding expectations for the impact of the COVID-19 pandemic, future financial performance, business strategies, expectations for our business, future operations, liquidity positions, availability of capital resources, financial position, estimated revenues and losses, projected costs, prospects, plans, objectives and beliefs of management are forward-looking statements.

    These forward-looking statements are based on information available as of the date of this Quarterly Report and our management’s current expectations, forecasts and assumptions, and involve a number of judgments, risks and uncertainties. Although we believe that the expectations reflected in such forward-looking statements are reasonable, we cannot give any assurance that such expectations will prove correct. Forward-looking statements should not be relied upon as representing our views as of any subsequent date. As a result of a number of known and unknown risks and uncertainties, our actual results or performance may be materially different from those expressed or implied by these forward-looking statements. Factors that could cause actual results to differ include:

•potential risks and uncertainties relating to COVID-19, including the geographic spread, the severity of the disease, the scope and duration of the COVID-19 pandemic, actions that may be taken by governmental authorities to contain the COVID-19 pandemic or to treat its impact, and the potential negative impacts of COVID-19 on economies and financial markets;

•availability of commercially reasonable and accessible sources of liquidity and bonding;

•our ability to generate cash flow and liquidity to fund operations;

•the timing and extent of fluctuations in geographic, weather and operational factors affecting our customers, projects and the industries in which we operate;

•our ability to identify acquisition candidates and integrate acquired businesses;

•our ability to grow and manage growth profitably;

•the possibility that we may be adversely affected by economic, business, and/or competitive factors;

•market conditions, technological developments, regulatory changes or other governmental policy uncertainty that affects us or our customers;

•our ability to manage projects effectively and in accordance with management estimates, as well as the ability to accurately estimate the costs associated with our fixed price and other contracts, including any material changes in estimates for completion of projects;

•the effect on demand for our services and changes in the amount of capital expenditures by customers due to, among other things, economic conditions, commodity price fluctuations, the availability and cost of financing, and customer consolidation;

•the ability of customers to terminate or reduce the amount of work, or in some cases, the prices paid for services, on short or no notice;

•customer disputes related to the performance of services;

•disputes with, or failures of, subcontractors to deliver agreed-upon supplies or services in a timely fashion;

•our ability to replace non-recurring projects with new projects;

•the impact of U.S. federal, local, state, foreign or tax legislation and other regulations affecting the renewable energy industry and related projects and expenditures;

•the effect of state and federal regulatory initiatives, including costs of compliance with existing and future safety and environmental requirements;

•fluctuations in equipment, fuel, materials, labor and other costs;

•our beliefs regarding the state of the renewable wind energy market generally; and

•the “Risk Factors” described in our Annual Report on Form 10-K for the year ended December 31, 2020, and in our quarterly reports, other public filings and press releases.

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We do not undertake any obligation to update forward-looking statements to reflect events or circumstances after the date they were made, whether as a result of new information, future events or otherwise, except as may be required under applicable securities laws.

    Throughout this section, unless otherwise noted “IEA,” “Company,” “we,” “us,” and “our” refer to Infrastructure and Energy Alternatives, Inc. and its consolidated subsidiaries. Certain amounts in this section may not foot due to rounding.

Overview

    We are a leading diversified infrastructure construction company with specialized energy and heavy civil expertise throughout the United States. We specialize in providing complete engineering, procurement and construction services throughout the United States for the renewable energy, traditional power and civil infrastructure industries. These services include the design, site development, construction, installation and restoration of infrastructure. We have completed more than 240 wind and solar projects in 40 states and construct one of every five gigawatts put in to place throughout the U.S. in any given year. Although the Company has historically focused on the renewable industry, but has recently focused on further expansion into the solar market and with our recent acquisitions have expanded its construction capabilities and geographic footprint in the areas of environmental remediation, industrial maintenance, specialty paving, heavy civil and rail infrastructure construction, creating a diverse national platform of specialty construction capabilities. We believe we have the ability to continue to expand these services because we are well-positioned to leverage our expertise and relationships in the wind energy business to provide complete infrastructure solutions in all areas.

    We have two reportable segments: the Renewables (“Renewables”) segment and the Heavy Civil and Industrial (“Specialty Civil”) segment. See Segment Results for a description of the reportable segments and their operations.

Coronavirus Pandemic Update

    The COVID-19 pandemic continues to significantly impact the United States and the world. Since the start of the COVID-19 pandemic, we have been focused on the safety of our employees and ensuring that our construction sites are managed by taking all reasonable precautions to protect on-site personnel.

    We are actively monitoring the COVID-19 pandemic, including disease progression, vaccine response and availability, federal, state and local government actions, the Center for Disease Control (“CDC”) and World Health Organization (“WHO”) responses, supplier and supply chain risks, and prevention and containment measures to maintain business operations. As the COVID-19 pandemic and the responses by federal, state and local governments continue to evolve, we continue to make adjustments to our practices and policies to protect the health of our employees and those we work with at our projects and office locations, while continuing to provide our essential construction services to our clients.

    We believe that the foregoing actions have significantly reduced the Company’s exposure to the effects of COVID-19, including our workforce’s exposure to infection from COVID-19. As of today, we have had a low incidence of infection in our workforce. As vaccines become increasingly available to our workforce, clients and their families, we are evaluating and redoing protocols as management deems appropriate and based on federal, state and local government recommendations and policies.

We have noticed an impact of COVID-19 in adding new projects to our backlog. Our bidding activity continues at very high levels, but the final approval process for some projects, especially in our Specialty Segment, has been slowed due to COVID-19. Despite that, we were able to maintain a relatively consistent total backlog for March 31, 2021 compared to December 31, 2020.

We are unable to predict whether COVID-19 will continue to negatively impact the construction business and the degree of such impact as more of the population becomes vaccinated. We do not believe that COVID-19 is having a negative impact on our liquidity. We could see a change in this status if we experience future work stoppages at our projects which would prevent us from billing customers for new work performed. If the federal, state and local governments proceed with more restrictive measures, and our customers determine to stop work or terminate projects, these actions would negatively impact our business, results of operations, liquidity and prospects. In addition, the Company is unable to predict any changes in the market for bonding by our sureties.

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Current Quarter Financials

Historically, our revenues and profitability are lowest in the first quarter of the year as inclement weather can create challenging work environments that are more costly for our customers or cause delays on projects. These seasonal patterns mean that revenues tend to be lowest in the first quarter with increases in the second and third quarters and some decline in the fourth quarter. In 2020, that traditional seasonality did not occur. To ensure renewables projects would qualify for the then-anticipated step down in the production tax credit, customers initiated several projects in the fourth quarter of 2019. The early mobilization and favorable weather conditions resulted in record first quarter revenue in 2020, strong second and third quarter performance, and a reduction in the 2020 fourth quarter as projects were completed earlier in the year.

For 2021, revenues are expected to revert to the traditional seasonality with the lowest revenues in the first quarter and increasing revenues for the next quarters. The change in seasonality makes for challenging comparisons between the first quarters of 2020 and 2021.

Key financial results for the quarter ended March 31, 2021 include:

•Backlog increased 29.3%, or $606.3 million to $2.7 billion as compared to $2.1 billion for the quarter ended March 31, 2020.

•Consolidated revenues decreased 22.8% to $276.4 million as compared to $358.2 million for the quarter ended March 31, 2020, of which 65.3% was attributable to the Renewables segment and 34.7% was attributable to the Specialty Civil segment;

•Operating income decreased $11.9 million, to a loss of $8.3 million as compared to income of $3.6 million for the quarter ended March 31, 2020; and

•Net income decreased 60.4%, or $7.7 million, to a net loss of $20.4 million as compared to $12.7 million for the quarter ended March 31, 2020;

Trends and Future Opportunities

Renewables Segment

The Renewables segment was impacted by the following significant operational trends:

•In late 2019, the Production Tax Credit (“PTC”) was extended for one year, which increased customer demand to complete construction on more projects for 2020. The extension provided a pull forward of the 2020 quarterly revenue timing.

•The locations of our construction projects in the first quarter of 2020 experienced more favorable weather conditions and early mobilization, which provided for earlier project starts.

•Our consistent, safe and reliable performance with our customers on our wind projects has allowed us to continue to capture further solar opportunities in backlog for the first quarter of 2021.

We have maintained a heavy focus on construction of renewable power production capacity as renewable energy, particularly from wind and solar, has become widely accepted within the electric utility industry and has become a cost-effective solution for the creation of new generating capacity. We believe that this shift coupled with the below, will continue to drive opportunity in this segment over the long-term:

•The current administration has a goal of investing $2 trillion in modern, sustainable, and clean energy infrastructure.

•Renewable energy power generation has reached a level of scale and maturity that permits these technologies to now be cost-effective competitors to more traditional power generation technologies, including on an unsubsidized basis. The most significant changes have been related to increased turbine sizes and better battery storage methods.

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•Over 40 states and the District of Colombia have adopted renewable portfolio standards for clean energy.

•In December 2020, there was a one year extension of the PTC at 60% for projects that begin construction prior to December 31, 2021 and a two year extension of 26% Solar Investment Tax Credit (“ITC”) to 2022 (22% credit extended through 2023).

As a result, wind and solar power are among the leading sources of new power generation capacity in the U.S., and the Company does not anticipate this trend to change in the near future as we are continuing to see growth through new awards in our backlog:

(in millions)
Segment	December 31, 2020		New Awards in first quarter 2021(1)		Revenue Recognized in first quarter 2021		Backlog at March 31, 2021(2)
Renewables	$	1,513.4	$	615.7	$	180.4	$	1,948.7

(1) New awards consist of the original contract price of projects added to our backlog plus or minus subsequent changes to the estimated total contract price of existing contracts.

(2) Backlog may differ from the transaction prices allocated to the remaining performance obligations as disclosed in Note 1. Business, Basis of Presentation and Significant Accounting Policies in Item 8. Such differences relate to the timing of executing a formal contract or receiving a notice to proceed. More specifically, backlog sometimes may include awards for which a contract has not yet been executed or a notice to proceed has not been issued, but for which there are no remaining major uncertainties that the project will proceed (e.g., adequate funding is in place).

Specialty Civil Segment

The Specialty Civil segment was impacted by the following significant operational trends:

•The COVID-19 pandemic continues to impact certain aspects of our projects in the rail end markets:

◦negatively impacted the budgets of some of our customers, which led to uncertainty and further delays on portions of our large rail jobs; and

◦increased the timing needed to obtain governmental approvals and environmental permitting that affected the start and bidding opportunities of certain rail projects.

•Competition increased in a few of our end markets, which led to lower margins on certain heavy civil construction projects reducing overall profitability.

•Despite the delays in project starts mentioned above we continued to see a strong bidding environment in the bidding environment for heavy civil construction and environmental remediation for 2021 and had significant awarded projects related to:

◦The environmental remediation market continues to provide opportunities for growth and the Company has been short listed on some very significant project with anticipated start dates in 2021; and

◦The heavy civil construction market continues to be consistent year over year for awarded projects.

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We believe that our business relationships with customers in these sectors are excellent and the strong reputation that our acquired companies have built has provided us with the right foundation to continue to grow our revenue base. The drivers to further growing this segment are as follows:

•The FMI 2021 Overview Report published in the first quarter of 2021 projects that nonresidential construction put in place for the United States will be over $500 billion per year from 2021 to 2024.

•Fast Act extension and highway trust fund infusion of $13.6 billion for the highway and transit account.

•According to the American Coal Ash Association, coal combustion residuals “CCRs” or “coal ash” are produced by coal-fired power plants and represent one of the largest categories of industrial waste in the U.S., as 78.6 million tons of CCRs were produced in 2019. The Company anticipates this could be a $50.0 billion industry over the next ten years.

Additionally, there is significant overlap in labor, skills and equipment needs between our Renewables segment and our Specialty Civil segment, which we expect will continue to provide us with operating efficiencies as we continue to expand this sector. The Company continues to cross leverage these two segments and continues to see future growth through new awards in our backlog:

(in millions)
Segment	December 31, 2020		New Awards in first quarter 2021(1)		Revenue Recognized in first quarter 2021		Backlog at March 31, 2021(2)
Specialty Civil	$	556.1	$	267.0	$	96.0	$	727.1

(1) New awards consist of the original contract price of projects added to our backlog plus or minus subsequent changes to the estimated total contract price of existing contracts.

(2) Backlog may differ from the transaction prices allocated to the remaining performance obligations as disclosed in Note 1. Business, Basis of Presentation and Significant Accounting Policies in Item 8. Such differences relate to the timing of executing a formal contract or receiving a notice to proceed. More specifically, backlog sometimes may include awards for which a contract has not yet been executed or a notice to proceed has not been issued, but for which there are no remaining major uncertainties that the project will proceed (e.g., adequate funding is in place).

Backlog

    For companies in the construction industry, backlog can be an indicator of future revenue streams. Estimated backlog represents the amount of revenue we expect to realize from the uncompleted portions of existing construction contracts, including new contracts under which work has not begun and awarded contracts for which the definitive project documentation is being prepared, as well as revenue from change orders and renewal options. Estimated backlog for work under fixed price contracts and cost-reimbursable contracts is determined based on historical trends, anticipated seasonal impacts, experience from similar projects and estimates of customer demand based on communications with our customers. Cost-reimbursable contracts are included in backlog based on the estimated total contract price upon completion.

The following table summarizes our backlog by segment as of March 31, 2021 and December 31, 2020:

(in millions)
Segments	March 31, 2021		December 31, 2020
Renewables	$	1,948.7	$	1,513.4
Specialty Civil	727.1		556.1
Total	$	2,675.8	$	2,069.5

The Company expects to recognize 69.2% of revenue related to its backlog in the next twelve months.

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Based on historical trends in the Company’s backlog, we believe awarded contracts to be firm and that the revenue for such contracts will be recognized over the life of the project. Timing of revenue for construction and installation projects included in our backlog can be subject to change as a result of customer delays, regulatory factors and/or other project-related factors. These changes could cause estimated revenue to be realized in periods later than originally expected, or not at all. In the past, we have occasionally experienced postponements, cancellations and reductions on construction projects, due to market volatility and regulatory factors. There can be no assurance as to our customers’ requirements or the accuracy of our estimates. As a result, our backlog as of any particular date is an uncertain indicator of future revenue and earnings.

    Backlog is not a term recognized under GAAP, although it is a common measurement used in our industry. Our methodology for determining backlog may not be comparable to the methodologies used by others. See ‘‘Item 1A. Risk Factors’’ in our Annual Report on Form 10-K filed with the SEC on March 8, 2021 for a discussion of the risks associated with our backlog.

Significant Factors Impacting Results

Our revenues, margins and other results of operations can be influenced by a variety of factors in any given period, including those described in Results of Operations and Forward Looking Statements, and those factors have caused fluctuations in our results in the past and are expected to cause fluctuations in our results in the future. Additional information with respect to certain of those factors is provided below.

Seasonality. Typically, our revenues are lowest in the first quarter of the year because cold, snowy or wet conditions can create challenging working environments that are more costly for our customers or cause delays on projects. In addition, infrastructure projects often do not begin in a meaningful way until our customers finalize their capital budgets, which typically occurs during the first quarter. Second quarter revenues are typically higher than those in the first quarter, as some projects begin, but continued cold and wet weather can often impact productivity. Third quarter revenues are typically the highest of the year, as a greater number of projects are underway and operating conditions, including weather, are normally more accommodating. Generally, revenues during the fourth quarter are lower than the third quarter but higher than the second quarter, as many projects are completed and customers often seek to spend their capital budgets before year end. However, the holiday season and inclement weather can sometimes cause delays during the fourth quarter, reducing revenues and increasing costs.

Our revenue and results of operations for our Specialty Civil segment are also affected by seasonality but to a lesser extent as these projects are more geographically diverse and less impacted by severe weather. While the first and second quarter revenues are typically lower than the third and fourth quarter, the geographical diversity has allowed this segment to be less seasonal over the course of the year.

Weather and Natural Disasters. The results of our business in a given period can be impacted by adverse weather conditions, severe weather events or natural disasters, which include, among other things, heavy or prolonged snowfall or rainfall, hurricanes, tropical storms, tornadoes, floods, blizzards, extreme temperatures, wildfires, pandemics and earthquakes. These conditions and events can negatively impact our financial results due to the termination, deferral or delay of projects, reduced productivity and exposure to significant liabilities.

Cyclical demand. Fluctuations in end-user demand within the industries we serve, or in the supply of services within those industries, can impact demand for our services. As a result, our business may be adversely affected by industry declines or by delays in new projects. Variations in project schedules or unanticipated changes in project schedules, in particular, in connection with large construction and installation projects, can create fluctuations in revenue, which may adversely affect us in a given period. In addition, revenue from master service agreements, while generally predictable, can be subject to volatility. The financial condition of our customers and their access to capital, variations in project margins, regional, national and global economic, political and market conditions, regulatory or environmental influences, and acquisitions, dispositions or strategic investments can also materially affect quarterly results. Accordingly, our operating results in any particular period may not be indicative of the results that can be expected for any other period.

Revenue mix. The mix of revenues based on the types of services we provide in a given period will impact margins, as certain industries and services provide higher-margin opportunities. Revenue derived from projects billed on a fixed-price basis totaled 96.2% for the three months ended March 31, 2021. Revenue and related costs for construction contracts billed on a time and materials basis are recognized as the services are rendered. Revenue derived from projects billed on a time and materials basis totaled 3.8% of consolidated revenue for the three months ended March 31, 2021.

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Size, scope and complexity of projects. Larger or more complex projects with design or construction complexities; more difficult terrain requirements; or longer distance requirements typically yield opportunities for higher margins as we assume a greater degree of performance risk and there is greater utilization of our resources for longer construction timeframes. Furthermore, smaller or less complex projects typically have a greater number of companies competing for them, and competitors at times may more aggressively pursue available work. A greater percentage of smaller scale or less complex work also could negatively impact margins due to the inefficiency of transitioning between a larger number of smaller projects versus continuous production on fewer larger projects. Also, at times we may choose to maintain a portion of our workforce and equipment in an underutilized capacity to ensure we are strategically positioned to deliver on larger projects when they move forward.

Project variability and performance. Margins for a single project may fluctuate period to period due to changes in the volume or type of work performed, the pricing structure under the project contract or job productivity. Additionally, our productivity and performance on a project can vary period to period based on a number of factors, including unexpected project difficulties or site conditions; project location, including locations with challenging operating conditions; whether the work is on an open or encumbered right of way; inclement weather or severe weather events; environmental restrictions or regulatory delays; protests, other political activity or legal challenges related to a project; and the performance of third parties.

Subcontract work and provision of materials. Work that is subcontracted to other service providers generally yields lower margins, and therefore an increase in subcontract work in a given period can decrease margins. Our customers are usually responsible for supplying the materials for their projects; however, under some contracts we agree to procure all or part of the required materials. Margins may be lower on projects where we furnish a significant amount of materials, including projects where we provide engineering, procurement and construction ("EPC") services, as our markup on materials is generally lower than our markup on labor costs. Furthermore, fluctuations in the price of materials we procure, including as a result of changes in U.S. or global trade relationships or other economic or political conditions, may impact our margins. In a given period, an increase in the percentage of work with higher materials procurement requirements may decrease our overall margins.

Results of Operations

Three Months Ended March 31, 2021 and 2020

    The following table reflects our condensed consolidated results of operations in dollar and percentage of revenue terms for the periods indicated:

	Three Months Ended March 31,
(in thousands)	2021				2020
Revenue	$	276,412	100.0	%	$	358,163	100.0	%
Cost of revenue	259,871		94.0	%	325,122		90.8	%
Gross profit	16,541		6.0	%	33,041		9.2	%
Selling, general and administrative expenses	24,846		9.0	%	29,484		8.2	%
Income from operations	(8,305)		(3.0)	%	3,557		1.0	%
Interest expense, net	(14,359)		(5.2)	%	(16,065)		(4.5)	%
Other expense	(162)		(0.1)	%	(1,102)		(0.3)	%
Income from continuing operations before income taxes	(22,826)		(8.3)	%	(13,610)		(3.8)	%
Benefit for income taxes	2,392		0.9	%	867		0.2	%
Net income	$	(20,434)	(7.4)	%	$	(12,743)	(3.6)	%

For a detailed discussion of Revenue and Gross profit see Segment Results, below.

Revenue. Revenue decreased 22.8%, or $81.8 million, in the first quarter of 2021, compared to the same period in 2020.

Gross profit. Gross profit decreased 49.9%, or $16.5 million, in the first quarter of 2021, compared to the same period in 2020. As a percentage of revenue, gross profit was 6.0% in the quarter, as compared to 9.2% in the prior-year period.

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Selling, general and administrative expenses. Selling, general and administrative expenses decreased 15.7%, or $4.6 million, in the first quarter of 2021, compared to the same period in 2020. Selling, general and administrative expenses were 9.0% of revenue in the first quarter of 2021, compared to 8.2% in the same period in 2020. The decrease in selling, general and administrative expenses was primarily driven by:

•Reductions in staff related benefit costs by $5.5 million; and

•Reductions in business travel costs by $0.4 million.

The reductions above were partially offset by expense increases for:

•Outside services fees of $0.6 million related to the secondary offering in the first quarter; and

•Information technology costs of $0.6 related to software licensing.

Interest expense, net. Interest expense, net decreased by $1.7 million, in the first quarter of 2021, compared to the same period in 2020. This decrease was primarily driven by lower effective interest rates on our term loan, partially offset by an increase in the dividend rate of 13.5% on the Company's preferred Series B stock dividend. The increase in rate was due to the Company's net lien leverage ratio being above 1.5:1.0.

Other expense. Other expense decreased by $0.9 million, to $0.2 million in the first quarter of 2021 from $1.1 million for the same period in 2020. This decrease was primarily the result of the impact of a decrease in the warrant liability in the first quarter of 2021. See further discussion in Note 5. Fair Value of Financial Instruments included in Item 1 of this Quarterly Report on Form 10-Q.

Benefit for income taxes. Benefit for income taxes increased $1.5 million, to a benefit of $2.4 million in the first quarter of 2021, compared to $0.9 million for the same period in 2020. The effective tax rates for the period ended March 31, 2021 and 2020 were 10.5% and 6.4%, respectively. The higher effective tax rate in the first quarter of 2021 was primarily attributable to higher permanent differences related to executive compensation, which are not deductible for federal and state income taxes. There were no changes in uncertain tax positions during the periods ended March 31, 2021 and 2020.

Segment Results

The Company operated our business as two reportable segments: the Renewables segment and the Specialty Civil segment. Each of our reportable segments is comprised of similar business units that specialize in services unique to the respective markets that each segment serves. The classification of revenue and gross profit for segment reporting purposes can at times require judgment on the part of management. Our segments may perform services across industries or perform joint services for customers in multiple industries. To determine reportable segment gross profit, certain allocations, including allocations of shared and indirect costs, such as facility costs, equipment costs and indirect operating expenses, were made based on segment revenue.

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The following table sets forth segment revenues and gross profit for the years indicated, as well as the dollar and percentage change from the prior year:

	Three Months Ended March 31,
(in thousands)	2021				2020
Segment	Revenue		% of Total Revenue		Revenue		% of Total Revenue
Renewables	$	180,374	65.3	%	$	248,746	69.5	%
Specialty Civil	96,038		34.7	%	109,417		30.5	%
Total revenue	$	276,412	100.0	%	$	358,163	100.0	%
Segment	Gross Profit		Gross Profit Margin		Gross Profit		Gross Profit Margin
Renewables	$	12,180	6.8	%	$	25,829	10.4	%
Specialty Civil	4,361		4.5	%	7,212		6.6	%
Total gross profit	$	16,541	6.0	%	$	33,041	9.2	%

Renewables Segment Results

Revenue. Renewables revenue was $180.4 million for the quarter ended March 31, 2021 as compared to $248.7 million for the same period in 2020, a decrease of 27.5%, or $68.4 million. The decrease in revenue was primarily due to an increase in customer demand in 2020 from the extension of the PTC credit in 2019, which increased the number of wind projects in construction during the first quarter of 2020, offset by increased growth in the Solar market during 2021:

•The company had 10 projects of greater than $5.0 million of revenue in the first quarter of 2021 compared to 13 projects during the same period in 2020,

•The average value of the 10 projects was $12.9 million in 2021 compared to $17.6 million related to the 13 projects during the same period in 2020, and

•Solar revenue increased $33.3 million for the quarter ended March 31, 2021 when compared to the same period for 2020.

Gross profit. Renewables gross profit was $12.2 million for the quarter ended March 31, 2021 as compared to $25.8 million for 2020, a decrease of 52.8%, or $13.6 million. As a percentage of revenue, gross profit was 6.8% in 2021, as compared to 10.4% in 2020. The decrease was primarily attributable to the timing of the project starts being later in the first quarter of 2021, which led to an increase in unabsorbed equipment and labor costs, compared to the same period in the prior year.

Specialty Civil Segment Results

Revenue. Specialty Civil revenue was $96.0 million for the quarter ended March 31, 2021 as compared to $109.4 million for 2020, a decrease of 12.2%, or $13.4 million. The decrease in revenue was primarily due to the delay of certain projects in the rail end markets, offset by higher revenue from our construction project mix in the heavy civil market as compared to 2020:

•Rail markets continue to experience a decrease in revenue primarily due to delay in project starts for railroads and lower budgets decreasing bidding opportunities, and

•Offsetting the decrease in revenue was a slight increase in our heavy civil construction mix of projects.

Gross profit. Specialty Civil gross profit was $4.4 million for the quarter ended March 31, 2021 as compared to $7.2 million for 2020, a decrease of 39.5%, or $2.9 million. As a percentage of revenue, gross profit was 4.5% in 2021, as compared to 6.6% in 2020. In the first quarter of 2021, the Company had lower gross margin due to the mix of the projects as there were more heavy civil construction projects, which typically generate lower gross margins than our rail and environmental remediation markets.

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Liquidity and Capital Resources

Overview

    Our primary sources of liquidity are cash flows from operations, our cash balances and availability under our Third A&R Credit Agreement. Our primary liquidity needs are for working capital, debt service, dividends on our Series B Preferred Stock, income taxes, capital expenditures, insurance collateral, and strategic acquisitions. As of March 31, 2021, we had approximately $95.2 million in cash, and $53.0 million availability under our Third A&R Credit Agreement.

We anticipate that our existing cash balances, funds generated from operations, and borrowings will be sufficient to meet our cash requirements for the next twelve months. No assurance can be given, however, that these sources will be sufficient, because there are many factors which could affect our liquidity, including some which are beyond our control. Please see “Item 1A. Risk Factors” in Part I of our Annual Report on Form 10-K filed with the SEC on March 8, 2021 for a discussion of the risks associated with our liquidity.

Capital Expenditures

    For the three months ended March 31, 2021, we incurred $8.0 million in finance lease payments and an additional $3.9 million cash purchases for equipment. We estimate that we will spend approximately two percent of revenue for capital expenditures for 2021. Actual capital expenditures may increase or decrease in the future depending upon business activity levels, as well as ongoing assessments of equipment lease versus buy decisions based on short and long-term equipment requirements.

Working Capital

    We require working capital to support seasonal variations in our business, primarily due to the effect of weather conditions on external construction and maintenance work and the spending patterns of our customers, both of which influence the timing of associated spending to support related customer demand. Our business is typically slower in the first quarter of each calendar year. Working capital needs are generally lower during the spring when projects are awarded and we receive down payments from customers. Conversely, working capital needs generally increase during the summer or fall months due to increased demand for our services when favorable weather conditions exist in many of the regions in which we operate. Working capital needs are typically lower and working capital is converted to cash during the winter months. These seasonal trends, however, can be offset by changes in the timing of projects, which can be affected by project delays or accelerations and/or other factors that may affect customer spending.

    Generally, we receive 5% to 10% cash payments from our customers upon the inception of our Renewable projects. Timing of billing milestones and project close-outs can contribute to changes in unbilled revenue. As of March 31, 2021, substantially all of our costs in excess of billings and earnings will be billed to customers in the normal course of business within the next twelve months. Net accounts receivable balances, which consist of contract billings as well as costs and earnings in excess of billings and retainage, increased to $318.0 million as of March 31, 2021 from $309.0 million as of December 31, 2020, due primarily to timing of project activity, and collection of billings to customers.

    Our billing terms are generally net 30 days, and some of our contracts allow our customers to retain a portion of the contract amount (generally, from 5% to 10%) until the job is completed. As part of our ongoing working capital management practices, we evaluate opportunities to improve our working capital cycle time through contractual provisions and certain financing arrangements. Our agreements with subcontractors often may contain a ‘‘pay-if-paid’’ provision, whereby our payments to subcontractors are made only after we are paid by our customers.

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Sources and Uses of Cash

    Sources and uses of cash are summarized below:

	Three Months Ended March 31,
(in thousands)	2021	2020
Net cash used in operating activities	(53,780)	(74,177)
Net cash (used in) provided by investing activities	(3,522)	87
Net cash used in financing activities	(11,566)	(15,088)

Operating Activities. Net cash used in operating activities for the three months ended March 31, 2021 was $53.8 million, as compared to net cash used by operating activities of $74.2 million over the same period in 2020. The increase in net cash used by operating activities reflects the timing of receipts from customers and payments to vendors in the ordinary course of business. The change was primarily attributable to lower payments on payables and accrued liabilities coupled with lower collections of accounts receivable and contract assets due to reduced activity level.

Investing Activities. Net cash used in investing activities for the three months ended March 31, 2021 was $3.5 million, as compared to net cash provided by investing activities of $0.1 million over the same period in 2020. The increase in net cash used by investing activities was primarily attributable to an increase in purchases of property, plant and equipment.

Financing Activities. Net cash used in financing activities for the three months ended March 31, 2021 was $11.6 million, as compared to net cash provided of $15.1 million over the same period in 2020. The reduction of cash used in financing activities of $3.5 million was primarily attributable to a reduction in net long-term debt transactions.

Series A Preferred Stock

    As of March 31, 2021, we had 17,483 shares of Series A Preferred Stock issued and outstanding. Each share of Series A Preferred Stock had an initial stated value of $1,000 per share (or approximately $17.5 million in the aggregate). Dividends are paid on the Series A Preferred Stock as, if and when declared by our Board. To extent permitted and only as, if and when declared by the Board, dividends are required to be paid in cash quarterly in arrears on each March 31, June 30, September 30 and December 31 on the stated value at a rate of 10% per annum.

    If not paid in cash, dividends will accrue on the stated value and will increase the stated value on and effective as of the applicable dividend date without any further action by the Board at 12% per annum. As of March 31, 2021, the Company had increased the initial stated value by $5.0 million in the aggregate rather than pay cash dividends.

    So long as any shares of Series B Preferred Stock of the Company are currently outstanding or from and after the occurrence of any non-payment event or default event and until cured or waived, the foregoing rates will increase by 2% per annum. The Company is currently restricted from paying cash dividends on Series A Preferred Stock because it has outstanding dividends that are accrued on the Series B preferred stock.

    The Series A Preferred Stock do not have a scheduled redemption date or maturity date. Subject to the terms of the Series B Preferred Stock, we may, at any time and from time to time, redeem all or any portion of the shares of Series A Preferred Stock then outstanding. As a condition to the consummation of any change of control (as described in the certificate governing the Series A Preferred Stock), we are required to redeem all shares of Series A Preferred Stock then outstanding. We are also required to use the net cash proceeds from certain transactions to redeem the maximum number of shares of Series A Preferred Stock that can be redeemed with such net cash proceeds, except as prohibited by the Third A&R Credit Agreement.

    Based on the stated value of the Series A Preferred Stock as of March 31, 2021 after giving effect to the accrual of dividends, we would be required to pay quarterly cash dividends in the aggregate of $0.6 million on the Series A Preferred Stock. If unpaid, the dividends will accrue at a rate of 12% per annum and increase the stated value of the Series A Preferred Stock. We do not presently expect to pay cash dividends.

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Series B Preferred Stock

    As of March 31, 2021, we had 199,474 shares of Series B Preferred Stock issued and outstanding. Each share of Series B Preferred Stock had an initial stated value of $1,000 per share (or approximately $199.5 million in the aggregate). Our common stock and Series A Preferred Stock are junior to the Series B Preferred Stock. Dividends are paid in cash on the Series B Preferred Stock as, if and when declared by our Board. To the extent not prohibited by applicable law, and only as, if and when declared by the Board, dividends are required to be paid in cash quarterly in arrears on each March 31, June 30, September 30 and December 31. For any dividend period that the Total Net Leverage Ratio is greater than 1.50:1.00, the dividend rate is 13.5% per annum; and otherwise at a rate of 12.0% per annum.

    If not paid in cash, dividends will accrue on the stated value and will increase the stated value on Series B Preferred Stock at a rate of 15%. As of March 31, 2021, the unpaid dividends had increased the initial stated value by $18.3 million in the aggregate.

    Until the Series B Preferred Stock is redeemed, neither we nor any of our subsidiaries can declare, pay or set aside any dividends on shares of any other class or series of capital stock, except in limited circumstances. We are required to redeem all shares of Series B Preferred Stock outstanding on February 15, 2025 at the then stated value plus all accumulated and unpaid dividends thereon through the day prior to such redemption. Subject to compliance with the terms of any credit agreement, we are also required to redeem all of the Series B Preferred Stock as a condition to the consummation of certain changes in control (as defined in certificate governing the Series B Preferred Stock), as well as use the net cash proceeds from certain transactions to redeem shares of Series B Preferred Stock.

    Based on the stated value of the Series B Preferred Stock as of March 31, 2021 after giving effect to the accrual of dividends, we would be required to pay quarterly cash dividends in the aggregate of $6.6 million on the Series B Preferred Stock. If not paid the dividends will accrue at a rate of 15% per annum and increase the stated value of the Series B Preferred Stock. Actual decisions regarding payment of cash dividends on the Series B Preferred Stock will be made at the time of the applicable dividend payment based upon availability of capital resources, business conditions, other cash requirements, and other relevant factors.

Deferred Taxes - COVID-19

The CARES Act was enacted on March 27, 2020, in response to the COVID-19 emergency. The CARES Act includes many measures to assist companies, including temporary changes to income and non-income-based tax laws. Some of the key income tax-related provisions of the CARES Act include:

•Eliminating the 80% of taxable income limitation by allowing corporate entities to fully utilize net operating losses (“NOLs”) to offset taxable income in 2018, 2019 or 2020.

•Allowing NOLs originating in 2018, 2019 or 2020 to be carried back five years.

•Increasing the net interest expense deduction limit to 50% of adjusted taxable income from 30% for tax years beginning 1 January 2019 and 2020.

•Allowing taxpayers with alternative minimum tax (“AMT”) credits to claim a refund in 2020 for the entire amount of the credit instead of recovering the credit through refunds over a period of years, as originally enacted by the Tax Cuts and Jobs Act (“TCJA”).

•Payroll tax deferral.

IEA has also made use of the payroll deferral provision to defer the 6.2% social security tax, or approximately $13.6 million, through December 31, 2020. This amount is required to be paid at 50% on December 31, 2021 and December 31, 2022.

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Amendment to Third A&R Credit Agreement

On October 30, 2020, the Company entered into a First Amendment to its Third A&R Credit Agreement (the “Amendment”). The Amendment provides for, among other things, an increase in the revolving credit commitments previously available by $25.0 million, bringing the aggregate principal amount of the revolving credit commitments under the Third A&R Credit Agreement to $75.0 million, upon the terms and subject to the satisfaction of the conditions set forth in the Third A&R Credit Agreement, as amended by the Amendment.

In addition, the Amendment provides that on and after the Amendment’s effective date and until delivery of the financial statements for the fiscal quarter ended December 31, 2020, as required under the Amendment, the percentage per annum interest rate for revolving loans and swing line loans is, at the Company’s option, (x) LIBOR plus a margin of 2.75% or (y) the applicable base rate plus a margin of 1.75%. Thereafter, for any day, the applicable percentage per annum interest rate for revolving loans and swing line loans is LIBOR or the base rate plus a margin depending upon the Company’s first lien net leverage ratio as of the last day of the most recently ended consecutive four fiscal quarter period, as set forth below:

First Lien Net Leverage Ratio	LIBOR Loans	Base Rate Loans
Less than 1.00:1.00	2.50%	1.50%
Less than 2.00:1.00 but greater than or equal to 1.00:1.00	2.75%	1.75%
Less than 3.00:1.00 but greater than or equal to 2.00:1.00	3.00%	2.00%
Less than 3.50:1.00 but greater than or equal to 3.00:1.00	3.25%	2.25%
Greater than or equal to 3.50:1.00	3.50%	2.50%

The Amendment also further specifies the unused commitment fee rate. On and after the Amendment’s effective date and until delivery of the financial statements for the fiscal quarter ended December 31, 2020, as required under the Amendment, the rate is 0.40% per annum. Thereafter, for any day, the applicable percentage per annum depends upon the Company’s senior secured net leverage ratio, as set forth below:

Senior Secured Net Leverage Ratio	Applicable Unused Commitment Fee Rate
Less than 1.00:1.00	0.35%
Less than 2.00:1.00 but greater than or equal to 1.00:1.0	0.40%
Less than 3.00:1.00 but greater than or equal to 2.00:1.00	0.45%
Greater than or equal to 3.00:1.00	0.50%

Contractual Obligations

    The following table sets forth our contractual obligations and commitments for the periods indicated as of March 31, 2021.

	Payments due by period
(in thousands)	Total		Remainder of 2021		2022		2023		2024		2025		Thereafter
Debt (principal) (1)	178,242		1,821		16,938		29,986		129,368		129		—
Debt (interest) (2)	37,912		9,242		12,020		10,285		6,362		3		—
Debt - Series B Preferred Stock (3)	199,474		—		—		—		—		199,474		—
Dividends - Series B Preferred Stock (4)	119,325		19,585		26,113		26,113		26,113		21,401		—
Finance leases (5)	54,398		19,994		21,996		7,267		3,264		1,799		78
Operating leases (6)	49,717		8,435		9,753		7,347		3,532		1,751		18,899
Total	$	639,068	$	59,077	$	86,820	$	80,998	$	168,639	$	224,557	$	18,977

(1)Represents the contractual principal payment due dates on our outstanding debt.

(2)Includes variable rate interest using March 31, 2021 rates.

(3)Represents the mandatorily redeemable debt - Series B Preferred with expected redemption date of February 15, 2025.

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(4)Future declared dividends have been included at 12% but payment determination will be evaluated each quarter resulting in differing accumulated dividend rates.

(5)We have obligations, inclusive of associated interest, recognized under various finance leases for equipment totaling $54.4 million at March 31, 2021. Net amounts recognized within property, plant and equipment, net in the condensed consolidated balance sheet under these financed lease agreements at March 31, 2021 totaled $69.0 million.

(6)We lease real estate, vehicles, office equipment and certain construction equipment from unrelated parties under non-cancelable leases. Lease terms range from month-to-month to terms expiring through 2038.

    For detailed discussion and additional information pertaining to our debt instruments, see Note 6. Debt and Note 7. Commitments and Contingencies in the notes to our condensed consolidated financial statements, included in Part I, Item 1.

Off-Balance Sheet Arrangements

    As is common in our industry, we have entered into certain off-balance sheet arrangements in the ordinary course of business. Our significant off-balance sheet transactions include liabilities associated with letter of credit obligations, surety and performance and payment bonds entered into in the normal course of business, liabilities associated with deferred compensation plans, liabilities associated with certain indemnification and guarantee arrangements.

    As of March 31, 2021 and December 31, 2020, the Company was contingently liable under letters of credit issued under its revolving credit facility or its old credit facility in the amount of $22.0 million and $7.8 million, respectively, related to projects and insurance.

    As of March 31, 2021 and December 31, 2020, the Company had outstanding surety bonds on projects of $3.0 billion and $2.8 billion, respectively.

Recently Issued Accounting Pronouncements

    See Note 1. Business, Basis of Presentation and Summary of Significant Accounting Policies in the notes to our condensed consolidated financial statements, included in Part I, Item 1.

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Item 3. Quantitative and Qualitative Disclosures About Market Risk

Credit Risk

    We are subject to concentrations of credit risk related to our net receivable position with customers, which includes amounts related to billed and unbilled accounts receivable and costs and earnings in excess of billings on uncompleted contracts net of advanced billings with the same customer. We grant credit under normal payment terms, generally without collateral, and as a result, we are subject to potential credit risk related to our customers’ ability to pay for services provided. This risk may be heightened if there is depressed economic and financial market conditions. However, we believe the concentration of credit risk related to billed and unbilled receivables and costs and estimated earnings in excess of billings on uncompleted contracts is limited because of the lack of concentration and the high credit rating of our customers.

Interest Rate Risk

    Borrowings under the Third A&R Credit Agreement and certain other borrowings are at variable rates of interest and expose us to interest rate risk. If interest rates increase, our debt service obligations on the variable rate indebtedness will increase even though the amount borrowed remains the same, and our net income and cash flows, including cash available for servicing our indebtedness, will correspondingly decrease. The outstanding debt balance as of March 31, 2021 was $178.2 million. A one hundred basis point change in the LIBOR rate would increase or decrease interest expense by $1.8 million. As of March 31, 2021, we had no derivative financial instruments to manage interest rate risk.

Item 4. Control and Procedures

    Attached as exhibits to this Quarterly Report on Form 10-Q are certifications of IEA’s Chief Executive Officer and Chief Financial Officer that are required in accordance with Rule 13a-14 of the Exchange Act of 1934. This section includes information concerning the controls and controls evaluation referred to in the certifications, and it should be read in conjunction with the certifications.

Evaluation of Disclosure Controls and Procedures

    Our management has established and maintains a system of disclosure controls and procedures that are designed to provide reasonable assurance that information required to be disclosed by us in the reports that we file or submit under the Exchange Act, such as this Quarterly Report, is recorded, processed, summarized and reported within the time periods specified in the SEC rules and forms. The disclosure controls and procedures are also designed to provide reasonable assurance that such information is accumulated and communicated to our management, including our Chief Executive Officer and Chief Financial Officer, as appropriate to allow timely decisions regarding required disclosure.

    As of the end of the period covered by this Quarterly Report, we evaluated the effectiveness of the design and operation of our disclosure controls and procedures pursuant to Rule 13a-15(b) of the Exchange Act. This evaluation was carried out under the supervision and with the participation of our management, including our Chief Executive Officer and Chief Financial Officer. Based on this evaluation, these officers have concluded that, as of March 31, 2021, our disclosure controls and procedures were effective.

Changes in Internal Control over Financial Reporting

    There has been no change in our internal control over financial reporting during the quarter ended March 31, 2021, that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

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Part II. OTHER INFORMATION

Item 1A. Risk Factors

    At March 31, 2021, there have been no other material changes from the risk factors previously disclosed in the Company's Annual Report on Form 10-K filed with the SEC on March 8, 2021, which is accessible on the SEC's website at www.sec.gov, except as described below.

Item 5. Other Information

2021 Annual Incentive Compensation Program

On May 5, 2021, the Company adopted the 2021 annual incentive compensation program (the “2021 AICP”), which amends and restates the Company’s current amended and restated annual incentive compensation program. The purpose of the 2021 AICP is to encourage excellence and high levels of performance, emphasize safety as a key goal, recognize the contributions of key employees to the overall profitability and safety of the Company, and encourage key employees to cooperate, share information and work together for the overall benefit of the Company and its shareholders.

The 2021 AICP provides for potential cash bonuses to eligible participants based upon achievement of one or more criteria, including:

•earnings, as measured by adjusted EBITDA on a consolidated basis or business unit operating income on a business unit basis;

•growth, as measured by change in year-end backlog;

•cash generation, as measured by free cash flow on a consolidated basis or change in work in progress on a business unit basis; and

•safety, as measured by target total reportable incident rate (“TRIR”) on a consolidated basis or a mix of a TRIR and vehicle, equipment, environmental and property rate (“VEEP”) on a business unit basis.

The Compensation Committee of the Board of Directors of the Company (the “Committee”) is delegated authority to determine target bonus awards, the calculation of the metric that will be used to determine the payment of target bonuses, as well as any minimum or maximum thresholds that may be used in determining the amount earned with respect to any specific criteria. The Committee may assign participants into different classes, with each class being subject to different target bonuses, performance criteria, and weightings.

The foregoing description of the 2021 AICP does not purport to be complete and is qualified in its entirety by reference to the full text of the 2021 AICP, which is filed herewith as Exhibit 10.4 and is incorporated in this “Item 5. - Other Information” by reference.

Item 6. Exhibits

(a)    Exhibits.

Exhibit Number

Description

2.1#

Agreement and Plan of Merger, dated as of November 3, 2017, by and among the Company, IEA Energy Services LLC, Wind Merger Sub I, Inc., Wind Merger Sub II, LLC, Infrastructure and Energy Alternatives, LLC, Oaktree Power Opportunities Fund III Delaware, L.P., solely in its capacity as the representative of the seller, and, solely for purposes of Section 10.3 thereof, and, to the extent related thereto, Article 12 thereof, M III Sponsor I LLC and M III Sponsor I LP (incorporated by reference to Exhibit 2.1 to the Company’s Amendment No. 1 to its Current Report on Form 8-K (File No. 001-37796) filed November 8, 2017).

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2.2	Amendment No. 1 to the Agreement and Plan of Merger, dated as of November 15, 2017, by and among IEA Energy Services LLC, M III Acquisition Corp., Wind Merger Sub I, Inc., Wind Merger Sub II, LLC, Infrastructure and Energy Alternatives, LLC, Oaktree Power Opportunities Fund III Delaware, L.P., solely in its capacity as the representative of the seller, and solely for purposes of Section 10.3 thereof, and, to the extent related thereto, Article 12 thereof, M III Sponsor I LLC and M III Sponsor I LP (incorporated by reference to Exhibit 2.2 to the Company’s Current Report on Form 8-K (File No. 001-37796) filed November 21, 2017).
2.3	Amendment No. 2 to the Agreement and Plan of Merger, dated as of December 27, 2017, by and among IEA Energy Services LLC, M III Acquisition Corp., Wind Merger Sub I, Inc., Wind Merger Sub II, LLC, Infrastructure and Energy Alternatives, LLC, Oaktree Power Opportunities Fund III Delaware, L.P., solely in its capacity as the representative of the seller, and solely for purposes of Section 10.3 thereof, and, to the extent related thereto, Article 12 thereof, M III Sponsor I LLC and M III Sponsor I LP (incorporated by reference to Exhibit 2.3 to the Company’s Current Report on Form 8-K (File No. 001-37796) filed January 2, 2018).
2.4	Amendment No. 3 to the Agreement and Plan of Merger, dated as of January 9, 2018, by and among IEA Energy Services LLC, M III Acquisition Corp., Wind Merger Sub I, Inc., Wind Merger Sub II, LLC, Infrastructure and Energy Alternatives, LLC, Oaktree Power Opportunities Fund III Delaware, L.P., solely in its capacity as the representative of the seller, and solely for purposes of Section 10.3 thereof, and, to the extent related thereto, Article 12 thereof, M III Sponsor I LLC and M III Sponsor I LP (incorporated by reference to Exhibit 2.4 to the Company’s Current Report on Form 8-K (File No. 001-37796) filed January 10, 2018).
2.5	Amendment No. 4 to the Agreement and Plan of Merger, dated as of February 7, 2018, by and among IEA Energy Services LLC, M III Acquisition Corp., Wind Merger Sub I, Inc., Wind Merger Sub II, LLC, Infrastructure and Energy Alternatives, LLC, Oaktree Power Opportunities Fund III Delaware, L.P., solely in its capacity as the representative of the seller, and solely for purposes of Section 10.3 thereof, and, to the extent related thereto, Article 12 thereof, M III Sponsor I LLC and M III Sponsor I LP (incorporated by reference to Exhibit 2.5 to the Company’s Current Report on Form 8-K (File No. 001-37796) filed February 9, 2018).
2.6	Amendment No. 5 to the Agreement and Plan of Merger, dated as of March 8, 2018, by and among IEA Energy Services LLC, M III Acquisition Corp., Wind Merger Sub I, Inc., Wind Merger Sub II, LLC, Infrastructure and Energy Alternatives, LLC, Oaktree Power Opportunities Fund III Delaware, L.P., solely in its capacity as the representative of the seller, and solely for purposes of Section 10.3 thereof, and, to the extent related thereto, Article 12 thereof, M III Sponsor I LLC and M III Sponsor I LP (incorporated by reference to Exhibit 2.6 to the Company’s Current Report on Form 8-K (File No. 001-37796) filed March 8, 2018).
2.7	Purchase and Sale Agreement, dated August 9, 2018, by and among IEA Energy Services LLC, Consolidated Construction Solutions I LLC and Consolidated Construction Investment Holdings LLC (incorporated by reference to Exhibit 2.1 to the Company’s Amendment to the Current Report on Form 8-K/A (File No. 001-37796) filed August 14, 2018).
2.8#	Equity Purchase Agreement, dated October 12, 2018, by and among IEA Energy Services LLC, William Charles Construction Group and the owners thereof (incorporated by reference to Exhibit 2.1 to the Company’s Amendment to the Current Report on Form 8-K/A (File No. 001-37796) filed October 15, 2018).
2.9	Amendment No. 1 to Equity Purchase Agreement, dated October 31, 2018, by and among IEA Energy Services LLC, William Charles Construction Group and the owners thereof (incorporated by reference to Exhibit 2.2 to the Company’s Current Report on Form 8-K (File No. 001-37796) filed November 2, 2018).
3.1	Second Amended and Restated Certificate of Incorporation of Infrastructure and Energy Alternatives, Inc., as amended through May 29, 2020.

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3.2	Amended and Restated Bylaws of Infrastructure and Energy Alternatives, Inc. (incorporated by reference to Exhibit 3.2 of the Company’s Current Report on Form 8-K (File No. 001-37796) filed with the Securities Exchange Commission on March 29, 2018).
3.3	Certificate of Designations of Series A Preferred Stock of Infrastructure and Energy Alternatives, Inc. (incorporated by reference to Exhibit 3.3 to the Company’s Current Report on Form 8-K filed March 29, 2018).
3.4	Amended and Restated Certificate of Designations of Series A Preferred Stock of Infrastructure and Energy Alternatives, Inc. (incorporated by reference to Exhibit 3.2 of the Company's Current Report on Form 8-K (File No. 001-37796) filed with the Securities Exchange Commission on May 22, 2019).
3.5	Certificate of Designations of Series B Preferred Stock of Infrastructure and Energy Alternatives, Inc. (incorporated by reference to Exhibit 3.1 of the Company's Current Report on Form 8-K (File No. 001-37796) filed May 22, 2019).
3.6	Amended and Restated Certificate of Designation of Series B-1 Preferred Stock of Infrastructure and Energy Alternatives, Inc. (incorporated by reference to Exhibit 3.1 of the Company's Current Report on Form 8-K (File No. 001-37796) filed with the Securities Exchange Commission on August 30, 2019).
3.7	Amended and Restated Certificate of Designation of Series B-2 Preferred Stock of Infrastructure and Energy Alternatives, Inc. (incorporated by reference to Exhibit 3.2 of the Company's Current Report on Form 8-K (File No. 001-37796) filed with the Securities Exchange Commission on August 30, 2019).
3.8	Certificate of Designations of Series B-3 Preferred Stock of Infrastructure and Energy Alternatives, Inc. (incorporated by reference to Exhibit 3.1 of the Company's Current Report on Form 8-K (File No. 001-37796) filed with the Securities Exchange Commission on November 14, 2019).
3.9	Second Amended and Restated Certificate of Designations of Series B-1 Preferred Stock of Infrastructure and Energy Alternatives, Inc. (incorporated by reference to Exhibit 3.2 of the Company's Current Report on Form 8-K (File No. 001-37796) filed with the Securities Exchange Commission on November 14, 2019).
3.10	Amended and Restated Certificate of Designations of Series B-2 Preferred Stock of Infrastructure and Energy Alternatives, Inc. (incorporated by reference to Exhibit 3.3 of the Company's Current Report on Form 8-K (File No. 001-37796) filed with the Securities Exchange Commission on November 14, 2019).
4.1	Description of Securities Registered under Section 12
4.2	Specimen Common Stock Certificate (incorporated by reference to Exhibit 4.1 of the Company’s Current Report on Form 8-K (File No. 001-37796) filed with the Securities Exchange Commission on March 29, 2018).
4.3	Specimen Preferred Stock Certificate (incorporated by reference to Exhibit 4.2 of the Company’s Current Report on Form 8-K (File No. 001-37796) filed with the Securities Exchange Commission on March 29, 2018).
4.4	Specimen Warrant Certificate (incorporated by reference to Exhibit 4.3 of the Company’s Current Report on Form 8-K (File No. 001-37796) filed with the Securities Exchange Commission on March 29, 2018).
4.5	Warrant Certificate, dated August 30, 2019, by and among Infrastructure and Energy Alternatives, Inc. and Ares Special Situations Fund IV, L.P. (incorporated by reference to Exhibit 10.2 of the Company's Current Report on Form 8-K (File No. 001-37796) filed with the Securities Exchange Commission on August 30, 2019).
4.6	Warrant Certificate, dated August 30, 2019, by and among Infrastructure and Energy Alternatives, Inc. and ASOF Holdings I, L.P. (incorporated by reference to Exhibit 10.3 of the Company's Current Report on Form 8-K (File No. 001-37796) filed with the Securities Exchange Commission on August 30, 2019).

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4.7	Warrant Agreement, dated July 7, 2016, between the Company and Continental Stock Transfer & Trust Company (incorporated by reference to Exhibit 4.1 of the Company’s Current Report on Form 8-K (File No. 001-37796) filed with the Securities Exchange Commission on July 13, 2016).
4.8	Amended and Restated Warrant Agreement, dated as of March 26, 2018, by and between the Company and Continental Stock Transfer & Trust Company, as Warrant Agent. (incorporated by reference to Exhibit 4.4 of the Company’s Current Report on Form 8-K (File No. 001-37796) filed with the Securities Exchange Commission on March 29, 2018).
4.9	Warrant Agreement, dated May 20, 2019, by and among Infrastructure and Energy Alternatives, Inc. and Ares Special Situations Fund IV, L.P. (incorporated by reference to Exhibit 10.6 of the Company's Current Report on Form 8-K (File No. 001-37796) filed with the Securities Exchange Commission on May 22, 2019).
4.10	Warrant Agreement, dated May 20, 2019, by and among Infrastructure and Energy Alternatives, Inc. and OT POF IEA Preferred B Aggregator, L.P. (incorporated by reference to Exhibit 10.7 of the Company's Current Report on Form 8-K (File No. 001-37796) filed with the Securities Exchange Commission on May 22, 2019).
4.11	Warrant Certificate, dated November 14, 2019, by and among Infrastructure and Energy Alternatives, Inc. and Ares Special Situations Fund IV, L.P. (incorporated by reference to Exhibit 10.2 of the Company's Current Report on Form 8-K (File No. 001-37796) filed with the Securities Exchange Commission on November 15, 2019).
4.12	Warrant Certificate, dated November 14, 2019, by and among Infrastructure and Energy Alternatives, Inc. and ASOF Holdings I, L.P. (incorporated by reference to Exhibit 10.3 of the Company's Current Report on Form 8-K (File No. 001-37796) filed with the Securities Exchange Commission on November 15, 2019).
4.13	Warrant Certificate, dated November 14, 2019, by and among Infrastructure and Energy Alternatives, Inc. and Infrastructure and Energy Alternatives, LLC (incorporated by reference to Exhibit 10.4 of the Company's Current Report on Form 8-K (File No. 001-37796) filed with the Securities Exchange Commission on November 15, 2019).
4.14	Form of Warrant Certificate (incorporated by reference to Exhibit A to Exhibit 4.1 to the Company’s Current Report on Form 8-K (File No. 001-37796) filed March 4, 2020).
4.15	Warrant Agreement, dated as of March 3, 2020, by and between Infrastructure and Energy Alternatives, Inc. and Continental Stock Transfer & Trust Company (incorporated by reference to Exhibit 4.1 of the Company’s Current Report on Form 8-K (File No. 001-37796) filed March 4, 2020).
4.16	Form of Indenture for Senior Debt Securities (incorporated by reference to Exhibit 4.20 of the Company's Current Report on Form S-3 (File No. 001-37796) filed December 4, 2020).
4.17	Form of Indenture for Subordinated Debt Securities (incorporated by reference to Exhibit 4.22 of the Company's Current Report on Form S-3 (File No. 001-37796) filed December 4, 2020).
4.18	Form of Warrant Certificate, dated March 23, 2021, by and among Infrastructure and Energy Alternatives, Inc. and each party to the Joinder Agreement to Registration Rights Agreement dated March 23, 2021 (incorporated by reference to Exhibit 4.27 to the Company's Registration Statement on Form S-3 (File No. 333-255097) filed on April 7, 2021).
10.1	Joinder to Registration Rights Agreement, dated March 23, 2021, by and among Infrastructure and Energy Alternatives, Inc. and the parties named therein (incorporated by reference to Exhibit 10.1 to the Company’s Registration Statement on Form S-3 (File No. 333-255097) filed on April 7, 2021).
10.2	Fifth Amendment to Amended and Restated Registration Rights Agreement, dated as of February 3, 2021, by and among Infrastructure and Energy Alternatives, Inc., Infrastructure and Energy Alternatives, LLC, Ares Special Situations Fund IV, L.P., ASOF Holdings I, L.P. and OT POF IEA Preferred B Aggregator, L.P. (incorporated by reference to Exhibit 10.1 to the Company's Current Report on Form 8-K (File No. 001-37796) filed on February 4, 2021).

40

10.3*	Termination Letter Agreement, dated March 26, 2021, by and among Infrastructure and Energy Alternatives, Inc., Infrastructure and Energy Alternatives, LLC, Oaktree Power Opportunities Fund III Delaware, L.P. and M III Sponsor I LLC.
10.4*†	2021 Annual Incentive Compensation Program.
31.1*	Certification of the Principal Executive Officer required by Rule 13a-14(a) and Rule 15d-14(a) under the Securities Exchange Act of 1934, as amended, as adopted pursuant to Section 302 of the Sarbanes Oxley Act of 2002.
31.2*	Certification of the Principal Financial Officer required by Rule 13a-14(a) and Rule 15d-14(a) under the Securities Exchange Act of 1934, as amended, as adopted pursuant to Section 302 of the Sarbanes Oxley Act of 2002.
32.1**	Certification of the Principal Executive Officer required by 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes Oxley Act of 2002.
32.2**	Certification of the Principal Financial Officer required by 18 U.S.C. Section 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
104	Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101.INS)

*Filed herewith.

**Furnished herewith

† Indicates a management contract or compensatory plan or arrangement.

# Schedules have been omitted pursuant to Item 601(b)(2) of Regulation S-K. We will furnish the omitted schedules to the

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SIGNATURE

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 hereunto duly authorized.

	INFRASTRUCTURE AND ENERGY ALTERNATIVES, INC.
Dated: May 10, 2021	By:	/s/ Peter J. Moerbeek
	Name: Peter J. Moerbeek
	Title:   Executive Vice President, Chief Financial Officer
		Principal Financial and Accounting Officer

EX-10.3

March 26, 2021

Infrastructure and Energy Alternatives, Inc.

6325 Digital Way, Suite 460

Indianapolis, IN 46278

Attention: Gil Melman

MIII Sponsor I LLC

c/o MIII Partners

130 West 42nd Street, 17th Floor

New York, NY 10036

Attention Mohsin Y. Meghji

Re: Termination of Third Amended and Restated Investor Rights Agreement dated as of January 23, 2020 (the “Investor Rights Agreement”) among Infrastructure and Energy Alternatives, Inc., MIII Sponsor I LLC, Infrastructure and Energy Alternatives, LLC and Oaktree Power Opportunities Fund III Delaware, L.P.

Ladies and Gentlemen:

The purpose of this letter is to terminate the Investor Rights Agreement as to Infrastructure and Energy Alternatives, LLC (“Seller”) and Oaktree Power Opportunities Fund III Delaware, L.P. (“GFI Representative”) subject to the terms herein. Seller and GFI Representative hereby notify MIII Sponsor I LLC (“Sponsor”) and Infrastructure and Energy Alternatives, Inc. (the “Company”) under Section 7.1 of the Investor Rights Agreement of the termination of their rights and obligations under the Investor Rights Agreement pursuant to Section 7.1(b) and 7.1(e), including all rights under Section 5.1(f). Notwithstanding anything to the contrary herein, the provisions that by their terms survive the termination of the Investor Rights Agreement with respect to Seller and GFI Representative (including the sections listed in Section 7.2), as well as Sections 2.1(e), (f), (g) and (h) shall survive the termination of the Investor Rights Agreement with respect to Seller and GFI Representative. For the avoidance of doubt, (i) all other agreements or arrangements between Seller and the GFI Representative or any of their affiliates, on the one hand, and the Company or any of its affiliates, on the other hand, shall remain in full force and effect and shall not be affected by the termination of the Investor Rights Agreement with respect to Seller and the GFI Representative; and (ii) the Investor Rights Agreement shall remain in full force and effect as to the remaining parties thereto. Please execute this termination notice below to memorialize your consent and agreement.

Very truly yours,

Infrastructure and Energy Alternatives, LLC
By:	/s/ Ian Schapiro
Name:	Ian Schapiro
Title:	Authorized Signatory
OAKTREE POWER OPPORTUNITIES FUND III DELAWARE, L.P.
By:	Oaktree Fund GP, LLC
Its:	General Partner
By:	Oaktree Fund GP I, L.P.
Its:	Managing Member
By:	/s/ Ian Schapiro
Name:	Ian Schapiro
Title:	Authorized Signatory
By:	/s/ Peter Jonna
Name:	Peter Jonna
Title:	Authorized Signatory
ACKNOWLEDGED AND AGREED THIS 26th DAY OF MARCH 2021:
INFRASTRUCTURE AND ENERGY ALTERNATIVES, INC.
By:	/s/ Gil Melman
Name:	Gil Melman
Title:	Executive Vice President, General Counsel, Corporate Secretary & Chief Compliance Officer
M III Sponsor I LLC
By:	/s/ Mohsin Y. Meghji
Name:	Mohsin Y. Meghji
Title:	Managing Member

Kirkland & Ellis LLP

333 South Hope Street, 29th Floor Los Angeles, CA 90071

Attn: Tana Ryan, P.C. Facsimile:(213) 680-8500

Email: tryan@kirkland.com

Kirkland & Ellis LLP

601 Lexington Avenue New York, NY 10022

Attn: Michael Kim

Facsimile: (212) 446-4900

Email: michael.kim@kirkland.com

M III Partners, LP

130 West 42nd Str., 17 Floor New York, New York 10036

Attention: Charles Garner Facsimile: (212) 531-4532

Email: cgarner@miiipartners.com

EX-10.4

INFRASTRUCTURE AND ENERGY ALTERNATIVES, INC.

2021

ANNUAL INCENTIVE COMPENSATION PROGRAM

Effective May 5, 2021

1.Purpose

The Compensation Committee (the “Committee”) of the Board of Directors of Infrastructure and Energy Alternatives, Inc., a Delaware corporation (the “Company”) has determined that it is desirable to maintain an annual incentive compensation program (the “Program”). The purposes of the Program include: (1) encouraging excellence and high levels of performance, (2) emphasizing safety as a key goal of the Company, (3) recognizing the contributions of key employees to the overall profitability and safety of the Company, and (4) encouraging key employees in the Company to cooperate, share information and work together as a team for the overall benefit of the Company and its shareholders. 

2.Participation

The Committee will determine employees eligible to participate in the Program (“Participants”), and reserves the right to review and change the class of eligible employees at any time.

3.Eligibility

a.Employment/Participation Level

Except in the case of death, disability or retirement, as set forth below, Participants must be employed in good standing at the time the awards are paid, and must have been continuously employed in a designated position for a period of nine months prior to the end of the fiscal year to be eligible to participate in the Program. Base salary for purposes of the Program shall include regular compensation only, and shall not include bonus award payments and any other miscellaneous payments that might be treated as income to the employee. Bonuses shall prorated based on start date as determined by executive management on a case by case basis.

b.Death, Disability and Retirement

If a Participant terminates employment with the Company during the fiscal year prior to December 31 for any reason or as a result of death, disability or retirement, or the Company terminates such Participant during the fiscal year prior to December 31 for any reason such employee will not be eligible to participate in the Program or be entitled to any award hereunder.

c.Military Service

If a Participant is on qualified military leave of absence during part or all of the fiscal year, such Participant will be eligible to participate in the Program if such Participant would have been otherwise eligible to participate. Such Participant’s base salary for purposes of determining any bonus award will be the Participant’s base salary that would have been paid had the Participant not been on military leave.

d.Extraordinary Circumstances

Extraordinary circumstances will be subject to review by the Committee.

4.Determination of Award and Payment

The Committee has determined that bonus awards may be paid on the basis of one or more of the following factors:

a.Performance Criteria

i. Earnings

A Committee approved Company Adjusted EBITDA goal on a consolidated basis (“Target Adjusted EBITDA”) may be used for determining the payment of a bonus award. Adjusted EBITDA for purposes of computing the bonus awards, as set forth herein, shall be calculated on the same basis as disclosed in the Company’s filings with the Securities and Exchange Commission (the “SEC”), along with any adjustments approved by the Committee. The Company’s audited annual financial statements, on a consolidated basis, will be used to determine whether the Target Adjusted EBITDA goal was met. Target Adjusted EBITDA shall be calculated on a basis to include the payment of bonuses under this Program as a deduction.

A Committee approved operating income goal on business unit basis (“Target Business Unit Operating Income”) may be used for determining the payment of a bonus award. Actual business unit operating income will be derived from components of the Company’s financial statements, or portions thereof, as filed with the SEC and shall be determined by executive management in consultation with the Committee.

ii. Growth

A Committee approved backlog growth target (“Target Backlog Growth”) may be used for determining the payment of a bonus award. The Company’s audited annual financial statements, on a consolidated basis, will be used to determine actual backlog growth.

iii.Cash Generation

A Committee approved Company free cash flow goal on a consolidated basis (“Target Cash Flow”) may be used for determining the payment of a bonus award. Target Cash Flow for purposes of computing the bonus awards, as set forth herein, shall be determined using the following formula: (a) cash flow from operations for the period; less (b) net capital expenditures

investments (as measured by net cash investment (purchases less dispositions) and additions financing by notes payable and capital and operating leases. The Company’s audited annual financial statements, on a consolidated basis, will be used to determine whether the Target Cash Flow goal was met. Target Cash Flow shall be calculated on a basis to include the payment of bonuses under this plan as a deduction.

A Committee approved change in work in progress (“WIP”) goal may be used for determining the payment of a bonus award. WIP for purposes of computing the bonus awards, as set forth herein, shall be determined using the following formula: (a) billing in excess (overbilled), less (b) contract assets (under billings and retainage receivable). Actual changes in WIP will be derived from components of the Company’s financial statements, or portions thereof, as filed with the SEC and shall be determined by executive management in consultation with the Committee.

iv.Safety

A Committee approved Company total reportable incident rate (“TRIR”) may be used for determining the payment of a bonus award. TRIR for purposes of computing the bonus awards, as set forth herein, shall be determined by the Committee and approved by the Board of Directors each year. For certain employees, TRIR may be calculated on the business unit division and/or operating company division as determined by executive management in consultation with the Committee.

For Participants who are not “executive officers” (as that term is defined in Rule 3b-7 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”)), the Company’s vehicle, equipment, environmental and property incident rate (“VEEP”) may be used for determining the payment of a bonus award. VEEP for purposes of computing the bonus awards, as set forth herein, shall be determined by the Committee and approved by the Board of Directors each year. VEEP will be calculated on the business unit division and/or operating company division basis as determined by executive management in consultation with the Committee.

v.Discretionary

For Participants who are not “executive officers” (as that term is defined in Rule 3b-7 of the Exchange Act), a discretionary component may be used for determining the payment of a bonus award. The Committee may use factors such as leadership, contributions to the Company, recognition in the Company’s industry as an expert, and any other factors the Committee deems appropriate for purposes of the discretionary component.

b.Award Payments

The annual bonus award for a given fiscal year will be paid to Participants in the Program in the year following the performance year after the outside auditors have completed their annual audit of the Company.     

5.Objectives and Formulas for Determination of the Bonus Awards

The Committee shall determine, on an annual basis, the percentage of base salary that a Participant is eligible to earn as a bonus under this Program, which may be as specified in any applicable employment agreement (the “Target Bonus”). In addition, the Committee shall determine, on an annual basis, from the performance criteria specified herein, the performance criteria that will be used to determine the payment of Target Bonuses for Participants, as well as any minimum or maximum thresholds that may be used in determining the amount earned with respect to any specific performance criteria. Notwithstanding the foregoing, if the achievement level of a performance criteria is below 50%, no payout will be made for that performance criteria, and if the achievement of a performance criteria is more than 100%, the payout cannot exceed 200% of the target amount allocated to that performance criteria.

The Committee may designate Participants into different classes, with each class of Participant being subject to different Target Bonuses, different performance criteria, different allocations to performance criteria, and different weightings of performance criteria.

In the event of extraordinary operating conditions that were unforeseen or changes in laws or accounting procedures after setting the objectives and percentages in this Program, such circumstances will be considered by the Compensation Committee in making awards.

6.Miscellaneous

a.Nothing in this Program shall confer upon a Participant any right to continue in the employment of the Company, or to interfere in any way with the right of the Company to terminate the Participant’s employment relationship with the Company at any time. Participation provides no guarantee that any bonus will be paid. The success of the Company as measured by the achievement of financial and safety goals shall determine the extent to which Participants may receive bonuses hereunder. In no event shall any employee be entitled to any amount payable hereunder until such time as the amounts are paid out to employees at the direction of management.

b.The payment made hereunder are intended to comply with, or be exempt from, the requirements of Section 409A of the Internal Revenue Code of 1986, as amended, and the regulations and guidance thereunder (“Section 409A”), and the terms of the Program related thereto shall be construed accordingly. Payments hereunder that are subject to Section 409A shall not be accelerated unless permitted under Section 409A. If a Participant who is a “specified employee” of the Company is entitled to a payment under this Program due to his or her “separation from service” (as such terms are used in Section 409A) and such payment is subject to the Section 409A six-month payment delay rule, then such payment shall not be made until the earlier of (1) the first business day that is more than six months following such Participant’s separation from service or (2) such Participant’s death.

c.The Company shall deduct from any payment made hereunder all applicable federal and state income and employment taxes.

EX-31.1

Exhibit 31.1

CERTIFICATION PURSUANT TO

Section 302 of the Sarbanes-Oxley Act of 2002

I, John Paul Roehm, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Infrastructure and Energy Alternatives, 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 annual 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.

Dated: May 10, 2021	By:	/s/ John Paul Roehm
	Name: John Paul Roehm
	Title:   Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATION PURSUANT TO

Section 302 of the Sarbanes-Oxley Act of 2002

I, Peter Moerbeek, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Infrastructure and Energy Alternatives, 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 annual 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.

	INFRASTRUCTURE AND ENERGY ALTERNATIVES, INC.
Dated: May 10, 2021	By:	/s/ Peter J. Moerbeek
	Name: Peter J. Moerbeek
	Title:   Chief Financial Officer

EX-32.1

Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

    In connection with the Quarterly Report of Infrastructure and Energy Alternatives, Inc. (the “Company”) on Form 10-Q for the quarter ended March 31, 2021, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), the undersigned officer of the Company certifies, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to such officer's 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 results of operations of the Company.

Dated: May 10, 2021	By:	/s/ John Paul Roehm
	Name: John Paul Roehm
	Title:   Chief Executive Officer

EX-32.2

Exhibit 32.2

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

    In connection with the Quarterly Report of Infrastructure and Energy Alternatives, Inc. (the “Company”) on Form 10-Q for the quarter ended March 31, 2021, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), the undersigned officer of the Company certifies, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to such officer's 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 results of operations of the Company.

Dated: May 10, 2021	By:	/s/ Peter J. Moerbeek
	Name: Peter J. Moerbeek
	Title:   Chief Financial Officer

XML

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2021	May 10, 2021
Entity Central Index Key	0001652362
Document Fiscal Year Focus	2021
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	Q1
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2021
Document Transition Report	false
Entity File Number	001-37796
Entity Registrant Name	Infrastructure & Energy Alternatives, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	47-4787177
Entity Address, Address Line One	6325 Digital Way
Entity Address, Address Line Two	Suite 460
Entity Address, City or Town	Indianapolis
Entity Address, State or Province	IN
Entity Address, Postal Zip Code	46278
City Area Code	765
Local Phone Number	828-2580
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		24,847,908
Common Stock, $0.0001 par value
Title of 12(b) Security	Common Stock, $0.0001 par value
Trading Symbol	IEA
Security Exchange Name	NASDAQ
Warrants for Common Stock
Title of 12(b) Security	Warrants for Common Stock
Trading Symbol	IEAWW
Security Exchange Name	NASDAQ

XML

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 95,173	$ 164,041
Accounts receivable, net	171,306	163,793
Contract Assets	146,696	145,183
Prepaid expenses and other current assets	46,656	19,352
Total current assets	459,831	492,369
Property, plant and equipment, net	127,264	130,746
Operating Lease, Right-of-Use Asset	34,994	36,461
Intangible Assets, Net (Excluding Goodwill)	23,818	25,434
Goodwill	37,373	37,373
Company-owned life insurance	4,519	4,250
Deferred Income Tax Assets, Net	4,461	2,069
Other Assets, Noncurrent	436	438
Total assets	692,696	729,140
Current liabilities:
Accounts Payable, Current	86,826	104,960
Accrued Liabilities, Current	116,793	129,594
Contract Liabilities	141,420	118,235
Current portion of finance lease obligations	24,728	25,423
Operating Lease, Liability, Current	8,779	8,835
Current portion of long-term debt	2,379	2,506
Total current liabilities	380,925	389,553
Finance lease obligations, less current portion	27,053	32,146
Operating Lease, Liability, Noncurrent	27,736	29,154
Long-term Debt	160,229	159,225
Debt - Series B Preferred Stock	175,164	173,868
Warrant Obligations	9,500	9,200
Deferred compensation	8,039	8,672
Total liabilities	788,646	801,818
Commitments and contingencies:
Series A Preferred Stock, par value, $0.0001 per share; 1,000,000 shares authorized; 17,483 shares and 17,483 shares issued and outstanding at March 31, 2021 and December 31, 2020, respectively	17,483	17,483
Stockholders' equity (deficit):
Common stock, par value, $0.0001 per share; 150,000,000 and 150,000,000 shares authorized; 23,348,353 and 21,008,745 shares issued and 23,348,353 and 21,008,745 outstanding at March 31, 2021 and December 31, 2020, respectively	2	2
Additional paid in capital	32,467	35,305
Accumulated deficit	(145,902)	(125,468)
Total stockholders' deficit	(113,433)	(90,161)
Total liabilities and stockholders' deficit	$ 692,696	$ 729,140
Preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares issued (in shares)	17,483	17,483
Preferred stock, shares outstanding	17,483	17,483
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized	150,000,000	150,000,000
Common stock, shares, issued	23,348,353	21,008,745
Common stock, shares, outstanding	23,348,353	21,008,745

XML

Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Mar. 31, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares issued (in shares)	17,483	17,483
Preferred stock, shares outstanding	17,483	17,483
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized	150,000,000	150,000,000
Common stock, shares, issued	23,348,353	21,008,745
Common stock, shares, outstanding	23,348,353	21,008,745

XML

Condensed Consolidated Statement of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Revenue	$ 276,412	$ 358,163
Cost of revenue	259,871	325,122
Gross profit	16,541	33,041
Selling, general and administrative expenses	24,846	29,484
Loss income from operations	(8,305)	3,557
Other income (expense), net:
Interest expense, net	(14,359)	(16,065)
Other expense	(162)	(1,102)
Loss before benefit for income taxes	(22,826)	(13,610)
Benefit for income taxes	2,392	867
Net loss	(20,434)	(12,743)
Less: Convertible Preferred Stock dividends	(656)	(766)
Net Income (Loss) Available to Common Stockholders, Basic	$ (21,090)	$ (13,509)
Earnings Per Share, Basic	$ (0.91)	$ (0.66)
Earnings Per Share, Diluted	$ (0.91)	$ (0.66)
Weighted Average Number of Shares Outstanding, Basic	23,057,731	20,522,216
Weighted Average Number of Shares Outstanding, Diluted	23,057,731	20,522,216

XML

Condensed Statements of Stockholders Equity (Deficit) Statement - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock, $0.0001 par value	Common Stock, $0.0001 par value Common Stock, $0.0001 par value	Additional Paid-in Capital	Additional Paid-in Capital Common Stock, $0.0001 par value	Treasury Stock	Treasury Stock Treasury Stock	Retained Earnings
Beginning Balance Shares, Issued at Dec. 31, 2019		20,461				(14)
Beginning Balance Stockholder's equity at Dec. 31, 2019	$ (109,103)	$ 2		$ 17,167		$ (76)		$ (126,196)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(12,743)							(12,743)
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	1,113			1,113
Stock Issued During Period, Shares, New Issues			240
Stock Issued During Period, Value, New Issues	196	$ 0			$ 280
Adjustments to Additional Paid in Capital, Warrant Issued	15,631			15,631
Treasury Stock, Shares							(38)
Dividends, Preferred Stock, Stock	(766)			(766)
Ending Balance Shares, Issued at Mar. 31, 2020		20,701				(52)
Ending Balance Stockholder's equity at Mar. 31, 2020	(105,672)	$ 2		33,425		$ (160)		(138,939)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Treasury Stock, Value							$ (84)
Beginning Balance Shares, Issued at Dec. 31, 2020		21,009				0
Beginning Balance Stockholder's equity at Dec. 31, 2020	(90,161)	$ 2		35,305		$ 0		(125,468)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(20,434)							(20,434)
Shares Issued, Earnout shares			1,803
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	727			727
Stock Issued During Period, Shares, New Issues			521
Stock Issued During Period, Shares, Other			15
Adjustments to Additional Paid in Capital, Income Tax Deficiency from Share-based Compensation	(2,909)				$ (2,909)
Dividends, Preferred Stock, Stock	(656)			(656)
Ending Balance Shares, Issued at Mar. 31, 2021		23,348				0
Ending Balance Stockholder's equity at Mar. 31, 2021	$ (113,433)	$ 2		$ 32,467		$ 0		$ (145,902)

XML

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cash flows from operating activities:
Net loss	$ (20,434)	$ (12,743)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	10,799	11,888
Fair Value Adjustment of Warrants	300	1,057
Amortization of Other Deferred Charges	2,859	2,237
Share-based compensation expense	727	1,113
Deferred compensation	0	(1,371)
Accrued dividends on Series B Preferred Stock	0	7,959
Deferred income taxes	(2,392)	(1,080)
Other Operating Activities, Cash Flow Statement	(902)	733
Change in operating assets and liabilities:
Accounts receivable	(7,513)	48,931
Increase (Decrease) in Contract with Customer, Asset	1,513	14,548
Prepaid expenses and other assets	(27,304)	(5,212)
Accounts payable and accrued liabilities	(31,593)	(104,760)
Increase (Decrease) in Contract with Customer, Liability	23,186	(8,381)
Net cash used in operating activities	(53,780)	(74,177)
Cash flow from investing activities:
Company-owned life insurance	(269)	599
Purchases of property, plant and equipment	(3,920)	(2,231)
Proceeds from sale of property, plant and equipment	667	1,719
Net cash (used in) provided by investing activities	(3,522)	87
Cash flows from financing activities:
Proceeds from Long-term Lines of Credit	0	46,000
Repayments of Long-term Lines of Credit	(686)	(55,853)
Payments on finance lease obligations	(7,971)	(5,781)
Proceeds from Convertible Debt	0	350
Proceeds, Issuance of Shares, Share-based Payment Arrangement, Including Option Exercised	0	196
Payment, Tax Withholding, Share-based Payment Arrangement	(2,909)	0
Net cash used in financing activities	(11,566)	(15,088)
Net change in cash and cash equivalents	(68,868)	(89,178)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Period Start	164,041	147,259
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Period End	95,173	58,081
Supplemental disclosure of cash and non-cash transactions:
Interest Paid, Excluding Capitalized Interest, Operating Activities	10,691	6,053
Income Taxes Paid, Net	(290)	(229)
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability	2,183	2,806
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	1,101	2,732
Dividends, Preferred Stock	$ 656	$ 766

XML

Business, Basis of Presentation and Significant Accounting Policies

3 Months Ended

Mar. 31, 2021

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies

Business, Basis of Presentation and Significant Accounting Policies

Organization and Reportable Segments

    Infrastructure and Energy Alternatives, Inc., a Delaware corporation, is a holding company organized on August 4, 2015 (together with its wholly-owned subsidiaries, “IEA” or the “Company”). On March 26, 2018, we became a public company by consummating a merger (the “Merger”) pursuant to an Agreement and Plan of Merger, dated November 3, 2017, with M III Acquisition Corporation (“M III”).

We segregate our business into two reportable segments: the Renewables segment and the Specialty Civil segment. See Note 10. Segments for a description of the reportable segments and their operations.

Principles of Consolidation

    The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States (“GAAP”) for interim financial information and with the instructions for Quarterly Reports on Form 10-Q and Rule 10-01 of Regulation S-X. Pursuant to these rules and regulations, certain information and footnote disclosures normally included in the annual audited consolidated financial statements prepared in accordance with GAAP have been condensed or omitted. Adjustments necessary to arrive at net income (loss) available for common stockholders, previously disclosed in Note 8. Earnings Per Share, have been added to the prior period presentation of the consolidated statements of operations to be comparable with the current period presentation.

    The unaudited condensed consolidated financial statements include the accounts of IEA and its wholly-owned domestic and foreign subsidiaries. The Company occasionally forms joint ventures with unrelated third parties for the execution of single contracts or projects. The Company assesses its joint ventures to determine if they meet the qualifications of a variable interest entity (“VIE”) in accordance with Accounting Standard Codification (“ASC”) Topic 810, Consolidation. For construction joint ventures that are not VIEs or fully consolidated but for which the Company has significant influence, the Company accounts for its interest in the joint ventures using the proportionate consolidation method, see Note 11. Joint Ventures.

In the opinion of management, these financial statements reflect all adjustments (consisting of normal recurring adjustments) that are necessary to present fairly the results of operations for the interim periods presented. The results of operations for the three months ended March 31, 2021 are not necessarily indicative of the results that may be expected for the year ending December 31, 2021. These financial statements should be read in conjunction with the Company’s audited consolidated financial statements for the year ended December 31, 2020 and notes thereto included in the Company’s 2020 Annual Report on Form 10-K.

Basis of Accounting and Use of Estimates

    The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with GAAP. The preparation of the condensed consolidated financial statements in conformity with GAAP requires the use of estimates and assumptions that affect the amounts reported in the condensed consolidated financial statements and the accompanying notes. Key estimates include: the recognition of revenue and project profit or loss; fair value estimates; valuations of goodwill and intangible assets; asset lives used in computing depreciation and amortization; accrued self-insured claims; other reserves and accruals; accounting for income taxes; and the estimated impact of contingencies and ongoing litigation. While management believes that its estimates are reasonable when considered in conjunction with the Company’s consolidated financial position and results of operations, actual results could differ materially from those estimates.

Revenue Recognition

    The Company derives revenue primarily from construction projects performed under contracts for specific projects requiring the construction and installation of an entire infrastructure system or specified units within an infrastructure system. Contracts contain multiple pricing options, such as fixed price, time and materials, or unit price. Generally, renewable energy projects are performed for private customers while Specialty Civil projects are performed for various governmental entities.

    Revenue derived from projects billed on a fixed-price basis totaled 96.2% and 96.0% of consolidated revenue from operations for the three months ended March 31, 2021 and 2020, respectively. Revenue and related costs for contracts billed on a time and materials basis are recognized as the services are rendered. Revenue derived from projects billed on a time and materials basis totaled 3.8% and 4.0% of consolidated revenue from operations for the three months ended March 31, 2021 and 2020, respectively.

    Construction contract revenue is recognized over time using the cost-to-cost measure of progress for fixed price contracts. The cost-to-cost measure of progress best depicts the continuous transfer of control of goods or services to the customer. The contractual terms provide that the customer compensates the Company for services rendered.

    Contract costs include all direct materials, labor and subcontracted costs, as well as indirect costs related to contract performance, such as indirect labor, supplies, tools, repairs and the costs of capital equipment. The cost estimation and review process for recognizing revenue over time under the cost-to-cost method is based on the professional knowledge and experience of the Company’s project managers, engineers and financial professionals. Management reviews estimates of total contract transaction price and total project costs on an ongoing basis. Changes in job performance, job conditions and management’s assessment of expected variable consideration are factors that influence estimates of the total contract transaction price, total costs to complete those contracts and profit recognition. Changes in these factors could result in revisions to revenue and costs of revenue in the period in which the revisions are determined on a prospective basis, which could materially affect the Company’s results of operations for that period. Provisions for losses on uncompleted contracts are recorded in the period in which such losses are determined.

Performance Obligations

    A performance obligation is a contractual promise to transfer a distinct good or service to the customer and is the unit of account under ASC Topic 606. The transaction price of a contract is allocated to distinct performance obligations and recognized as revenue when or as the performance obligations are satisfied. The Company’s contracts often require significant integrated services and, even when delivering multiple distinct services, are generally accounted for as a single performance obligation. Contract amendments and change orders are generally not distinct from the existing contract due to the significant integrated service provided in the context of the contract and are accounted for as a modification of the existing contract and performance obligation. With the exception of certain Specialty Civil service contracts, the majority of the Company’s performance obligations are generally completed within one year.

    When more than one contract is entered into with a customer on or close to the same date, the Company evaluates whether those contracts should be combined and accounted for as a single contract as well as whether those contracts should be accounted for as more than one performance obligation. This evaluation requires significant judgment and is based on the facts and circumstances of the various contracts, which could change the amount of revenue and profit recognition in a given period depending upon the outcome of the evaluation.

    Remaining performance obligations represent the amount of unearned transaction prices for contracts, including approved and unapproved change orders. As of March 31, 2021, the amount of the Company’s remaining performance obligations was $1,627.5 million. The Company expects to recognize approximately 67.7% of its remaining performance obligations as revenue during the next twelve months. Revenue recognized from performance obligations satisfied in previous periods was $0.4 million and $(2.0) million for the three months ended March 31, 2021 and 2020, respectively.

Variable Consideration

    Transaction pricing for the Company’s contracts may include variable consideration, such as unapproved change orders, claims, incentives and liquidated damages. Management estimates variable consideration for a performance obligation utilizing estimation methods that best predict the amount of consideration to which the Company will be entitled. Variable consideration is included in the estimated transaction price to the extent it is probable that a significant reversal of cumulative revenue recognized will not occur when the uncertainty associated with the variable consideration is resolved. Management’s estimates of variable consideration and determination of whether to include estimated amounts in transaction price are based on legal opinions, past practices with the customer, specific discussions, correspondence or preliminary negotiations with the customer and all other relevant information that is reasonably available. The effect of a change in variable consideration on the transaction price of a performance obligation is typically recognized as an adjustment to revenue on a cumulative catch-up basis. To the extent unapproved change orders, claims and liquidated damages reflected in transaction price are not resolved in the Company’s favor, or to the extent incentives reflected in transaction price are not earned, there could be reductions in, or reversals of, previously recognized revenue.

    As of March 31, 2021 and December 31, 2020, the Company included approximately $42.8 million and $52.6 million, respectively, of unapproved change orders and/or claims in the transaction price for certain contracts that were in the process of

being resolved in the normal course of business, including through negotiation, arbitration and other proceedings. These transaction price adjustments are included within Contract Assets or Contract Liabilities as appropriate. The Company actively engages with its customers to complete the final change order approval process, and generally expects these processes to be completed within one year. Amounts ultimately realized upon final acceptance by customers could be higher or lower than such estimated amounts.

Disaggregation of Revenue

    The following tables disaggregate revenue by customers and services performed, which the Company believes best depicts the nature, amount, timing and uncertainty of its revenue:

(in thousands)	Three Months Ended
	March 31, 2021		March 31, 2020
Renewables Segment
Wind	$	146,858	$	248,537
Solar	33,516		209
	$	180,374	$	248,746
Specialty Civil Segment
Heavy civil	$	48,871	$	41,222
Rail	26,868		47,057
Environmental	20,299		21,138
	$	96,038	$	109,417

Concentrations

    The Company had the following approximate revenue and accounts receivable concentrations, net of allowances, for the periods ended:

	Revenue %
	Three Months Ended			Accounts Receivable %
	March 31, 2021	March 31, 2020		March 31, 2021	December 31, 2020
Company A (Renewables Segment)	*	11.5	%	*	*
Company B (Renewables Segment)	*	11.1	%	*	*

* Amount was not above 10% threshold

Construction Joint Ventures

Certain contracts are executed through joint ventures. The arrangements are often formed for the execution of single contracts or projects and allow the Company to share risks and secure specialty skills required for project execution.

In accordance with ASC Topic 810, Consolidation the Company assesses its joint ventures at inception to determine if any meet the qualifications of a VIE. The Company considers a joint venture a VIE if either (a) the total equity investment is not sufficient to permit the entity to finance its activities without additional subordinated financial support, (b) characteristics of a controlling financial interest are missing (either the ability to make decisions through voting or other rights, the obligation to absorb the expected losses of the entity or the right to receive the expected residual returns of the entity), or (c) the voting rights of the equity holders are not proportional to their obligations to absorb the expected losses of the entity and/or their rights to receive the expected residual returns of the entity and substantially all of the entity’s activities either involve or are conducted on behalf of an investor that has disproportionately few voting rights. Upon the occurrence of certain events outlined in ASC 810, the Company reassesses its initial determination of whether the joint venture is a VIE.

The Company also evaluates whether it is the primary beneficiary of each VIE and consolidates the VIE if the Company has both (a) the power to direct the economically significant activities of the entity and (b) the obligation to absorb

losses of, or the right to receive benefits from, the entity that could potentially be significant to the VIE. The Company considers the contractual agreements that define the ownership structure, distribution of profits and losses, risks, responsibilities, indebtedness, voting rights and board representation of the respective parties in determining whether it qualifies as the primary beneficiary. The Company also considers all parties that have direct or implicit variable interests when determining whether it is the primary beneficiary. When the Company is determined to be the primary beneficiary, the VIE is consolidated. In accordance with ASC 810, management’s assessment of whether the Company is the primary beneficiary of a VIE is performed continuously.

Construction joint ventures that do not involve a VIE, or for which the Company is not the primary beneficiary, are evaluated for consolidation under the voting interest model that considers whether the Company owns or controls more than 50% of the voting interest in the joint venture. For construction joint ventures that are not consolidated but for which the Company has significant influence, the Company accounts for its interest in the joint ventures using the proportionate consolidation method, whereby the Company’s proportionate share of the joint ventures’ assets, liabilities, revenue and cost of operations are included in the appropriate classifications in the Company’s consolidated financial statements. See Note 11. Joint Ventures for additional discussion regarding joint ventures.

Recently Adopted Accounting Standards - Guidance Adopted in 2020

In December 2019, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2019-12, “Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes,” which removes certain exceptions to the general principles in Topic 740 and also clarifies and amends existing guidance to improve consistent application. This ASU is effective for fiscal years beginning after December 15, 2020, and interim periods within those fiscal years. Depending on the amendment, adoption may be applied on the retrospective, modified retrospective, or prospective basis. The Company adopted the standard on January 1, 2021 on a prospective basis, which did not have an impact on our disclosures for income taxes.

Recently Issued Accounting Standards Not Yet Adopted

    In June 2016, the FASB issued ASU 2016-13, “Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments,” which introduced an expected credit loss methodology for the measurement and recognition of credit losses on most financial assets, including trade accounts receivables. The expected credit loss methodology under ASU 2016-13 is based on historical experience, current conditions and reasonable and supportable forecasts, and replaces the probable/incurred loss model for measuring and recognizing expected losses under current GAAP. The ASU also requires disclosure of information regarding how a company developed its allowance, including changes in the factors that influenced management’s estimate of expected credit losses and the reasons for those changes. The ASU and its related clarifying updates are effective for smaller reporting companies for fiscal years beginning after December 15, 2022, and interim periods within those fiscal years, with early adoption permitted. The Company is still evaluating the new standard but do not expect it to have a material impact on our estimate of the allowance for uncollectable accounts.

Management has evaluated other recently issued accounting pronouncements and does not believe that they will have a significant impact on the financial statements and related disclosures.

COVID-19 Pandemic

    During March 2020, the World Health Organization declared a global pandemic related to the rapidly growing outbreak of a novel strain of coronavirus (“COVID-19”). The COVID-19 pandemic has significantly affected economic conditions in the United States and internationally as national, state and local governments reacted to the public health crisis by requiring mitigation measures that have disrupted business activities for an uncertain period of time.

The Company believes that the COVID-19 pandemic has not had a material adverse impact on the Company’s financial results for the period ended March 31, 2021. Currently, most of the Company’s construction services are deemed essential under governmental mitigation orders and all of our business segments continue to operate. The Company has issued several notices of force majeure for the purpose of recognizing delays in construction schedules due to COVID-19 outbreaks on certain of its work sites and has also received notices of force majeure from the owners of certain projects and certain subcontractors. Management does not believe that any delays on projects related to these events of force majeure will have a material impact on its results of operations.

Management’s top priority has been to take appropriate actions to protect the health and safety of the Company's employees, customers and business partners, including adjusting the Company's standard operating procedures to respond to

evolving health guidelines. Management believes that it is taking appropriate steps to mitigate any potential impact to the Company; however, given the uncertainty regarding the potential effects of the COVID-19 pandemic, any future impacts cannot be quantified or predicted with specificity.The effects of the COVID-19 pandemic could affect the Company’s future business activities and financial results, including new contract awards, reduced crew productivity, contract amendments or cancellations, higher operating costs or delayed project start dates or project shutdowns that may be requested or mandated by governmental authorities or others.

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Contract Assets and Liabilities

3 Months Ended

Mar. 31, 2021

Contractors [Abstract]

Contract Assets and Liabilities

Contract Assets and Liabilities

    The timing of when we bill our customers is generally dependent upon agreed-upon contractual terms, milestone billings based on the completion of certain phases of the work, or when services are provided. Sometimes, billing occurs subsequent to revenue recognition, resulting in unbilled revenue, which is accounted for as a contract asset. Sometimes we receive advance payments or deposits from our customers before revenue is recognized, resulting in deferred revenue, which is accounted for as a contract liability.

    Contract assets in the Condensed Consolidated Balance Sheets represent the following:

•costs and estimated earnings in excess of billings, which arise when revenue has been recorded but the amount has not been billed; and

•retainage amounts for the portion of the contract price billed by us for work performed but held for payment by the customer as a form of security until we reach certain construction milestones or complete the project.

    Contract assets consisted of the following:

(in thousands)	March 31, 2021		December 31, 2020
Costs and estimated earnings in excess of billings on uncompleted contracts	$	60,132	$	51,367
Retainage receivable	86,564		93,816
	$	146,696	$	145,183

    Contract liabilities consist of the following:

(in thousands)	March 31, 2021		December 31, 2020
Billings in excess of costs and estimated earnings on uncompleted contracts	$	141,231	$	117,641
Loss on contracts in progress	189		594
	$	141,420	$	118,235

    Revenue recognized for the three months ended March 31, 2021 that was included in the contract liability balance at December 31, 2020 was approximately $87.8 million.

    Activity in the allowance for doubtful accounts for the periods indicated was as follows:

	Three Months Ended
	March 31,
(in thousands)	2021		2020
Allowance for doubtful accounts at beginning of period	$	—	$	75
Plus: provision for (reduction in) allowance	—		14
Less: write-offs, net of recoveries	—		—
Allowance for doubtful accounts at period end	$	—	$	89

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Property, plant and equipment, net

3 Months Ended

Mar. 31, 2020

Property, Plant and Equipment [Abstract]

Property, plant and equipment, net

Property, Plant and Equipment, Net

    Property, plant and equipment consisted of the following:

(in thousands)	March 31, 2021		December 31, 2020
Buildings and leasehold improvements	$	4,890	$	4,402
Land	17,600		17,600
Construction equipment	197,057		192,402
Office equipment, furniture and fixtures	3,637		3,620
Vehicles	7,426		7,326
	230,610		225,350
Accumulated depreciation	(103,346)		(94,604)
Property, plant and equipment, net	$	127,264	$	130,746

    Depreciation expense of property, plant and equipment was $9,183 and $8,516 for the three months ended March 31, 2021 and 2020, respectively.

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Goodwill and Intangible Assets, net (Notes)

3 Months Ended

Mar. 31, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets Disclosure

Goodwill and Intangible Assets, Net

    The following table provides the changes in the carrying amount of goodwill, by segment:

(in thousands)	Renewables		Specialty Civil		Total
January 1, 2020	$	3,020	$	34,353	$	37,373
Adjustments	—		—		—
December 31, 2020	$	3,020	$	34,353	$	37,373
Adjustments	—		—		—
March 31, 2021	$	3,020	$	34,353	$	37,373

Intangible assets consisted of the following as of the dates indicated:

	March 31, 2021							December 31, 2020
($ in thousands)	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Weighted Average Remaining Life	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Weighted Average Remaining Life
Customer relationships	$	26,500	$	(9,427)	$	17,073	4.75 years	$	26,500	$	(8,481)	$	18,019	5 years
Trade name	13,400		(6,655)		6,745		2.75 years	13,400		(5,985)		7,415		3 years
	$	53,800	$	(29,982)	$	23,818		$	53,800	$	(28,366)	$	25,434

Amortization expense associated with intangible assets for the three months ended March 31, 2021 and 2020, totaled $1.6 million and $3.4 million, respectively.

    The following table provides the annual intangible amortization expense currently expected to be recognized for the years 2021 through 2025:

(in thousands)	Remainder of 2021		2022		2023		2024		2025
Amortization expense	$	4,849	$	6,466	$	5,841	$	3,785	$	2,876

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Fair value of financial instruments

3 Months Ended

Mar. 31, 2021

Fair Value Disclosures [Abstract]

Fair value of financial instruments

Fair Value of Financial Instruments

    The Company applies ASC Topic 820, Fair Value Measurement, which establishes a framework for measuring fair value. ASC 820 defines fair value as an exit price, which is the price that would be received for an asset or paid to transfer a liability in the Company’s principal or most advantageous market in an orderly transaction between market participants on the measurement date. The fair value hierarchy established in ASC 820 generally requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. Observable inputs reflect the assumptions that market participants would use in pricing the asset or liability and are developed based on market data obtained from sources independent of the reporting entity. Unobservable inputs reflect the entity’s own assumptions based on market data and the entity’s judgments about the assumptions that market participants would use in pricing the asset or liability and are developed based on the best information available in the circumstances.

    The valuation hierarchy is composed of three levels. The classification within the valuation hierarchy is based on the lowest level of input that is significant to the fair value measurement. The levels within the valuation hierarchy are described below:

Level 1 — Inputs to the fair value measurement are observable inputs, such as quoted prices in active markets for identical assets or liabilities listed on active market exchanges.

Level 2 — Inputs to the fair value measurement are determined using prices for recently traded assets and liabilities with similar underlying terms, as well as direct or indirect observable inputs, such as interest rates and yield curves that are observable at commonly quoted intervals.

Level 3 — Inputs to the fair value measurement are unobservable inputs, such as estimates, assumptions, and valuation techniques when little or no market data exists for the assets or liabilities.

    The following table sets forth information regarding the Company's liabilities measured at fair value on a recurring basis:    

	March 31, 2021								December 31, 2020
(in thousands)	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Liabilities
Private warrants	$	—	$	1,000	$	—	$	1,000	$	—	$	—	$	—	$	—
Series B Preferred Stock - Anti-dilution warrants	—		—		8,100		8,100		—		—		8,800		8,800
Series B-1 Preferred Stock - Performance warrants	—		—		400		400		—		—		400		400
Total liabilities	$	—	$	1,000	$	8,500	$	9,500	$	—	$	—	$	9,200	$	9,200

The following is a reconciliation of the beginning and ending balances of recurring fair value measurements using Level 3 inputs:

(in thousands)	Series B Preferred Stock - Anti-dilution warrants		Series B-1 Preferred Stock - Performance warrants
Beginning Balance, December 31, 2020	$	8,800	$	400
Fair value adjustment - loss (gain) recognized in other income	(700)		—
Ending Balance, March 31, 2021	$	8,100	$	400

In 2019, the Company entered into three equity purchase agreements and issued Series B Preferred Stock as discussed in Note 6. Debt and Series B Preferred Stock. The agreements require that on the conversion of any of the Convertible Series A Preferred Stock to common shares, the Series B Preferred Stock will receive additional warrants (Anti-dilution Warrants) to purchase common shares at a price of $0.0001 per share. The agreements also require that if the Company fails to meet a certain Adjusted EBITDA (as that term is defined in the agreements) threshold on a trailing twelve-month basis from May 31, 2020 through April 30, 2021, the Series B Preferred Stock will receive additional warrants (Performance Warrants) to purchase common shares at $0.0001 per share. On May 20, 2019, the conversion rights for the Series A Preferred Stock were amended to allow the holders of Series A Preferred Stock to convert all or any portion of Series A Preferred Stock outstanding into common stock at any point in time.

    The information below describes the balance sheet classification and the recurring fair value measurement for these requirements:

Private Warrants (recurring) - The Company has 295,000 private warrants that are not actively traded on the public markets and the Company adjusts the fair value at the end of each fiscal period using the price on that date multiplied by the remaining private warrants. The Private warrants were recorded as Warrant obligations at the end of the quarter and the fair value adjustment was recorded as other expense for the three months ended March 31, 2021. For further discussion see Note 8. Earnings Per Share.

    Series B Preferred Stock - Anti-dilution Warrants (recurring) - The number of common shares attributable to the warrants issued to Series B Preferred Stockholders upon conversion by Series A Preferred Stockholders is determined on a 30-day volume weighted average. The Anti-dilution warrant liability was valued using the stock price at the end of the quarter and were recorded as a liability.

    Series B-1 Preferred Stock - Performance Warrants (recurring) - The warrant liability was recorded at fair value as a liability, using a Monte Carlo Simulation based on certain significant unobservable inputs, such as a risk rate premium, Adjusted EBITDA volatility, stock price volatility and projected Adjusted EBITDA for the Company.

    Other financial instruments of the Company not listed in the table consist of cash and cash equivalents, accounts receivable, accounts payable and other current liabilities that approximate their fair values. Additionally, management believes that the outstanding recorded balance on the line of credit and long-term debt, approximates fair value due to their floating interest rates.

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Debt and Series B Preferred Stock

3 Months Ended

Mar. 31, 2021

Debt Disclosure [Abstract]

Debt and Series B Preferred Stock

Debt and Series B Preferred Stock

    Debt consisted of the following obligations as of:

(in thousands)	March 31, 2021		December 31, 2020
Term loan	$	173,345	$	173,345
Commercial equipment notes	4,897		5,582
Total principal due for long-term debt	178,242		178,927
Unamortized debt discount and issuance costs	(15,634)		(17,196)
Less: Current portion of long-term debt	(2,379)		(2,506)
Long-term debt, less current portion	$	160,229	$	159,225
Debt - Series B Preferred Stock	$	185,998	$	185,396
Unamortized debt discount and issuance costs	(10,834)		(11,528)
Long-term Series B Preferred Stock	$	175,164	$	173,868

The weighted average interest rate for the term loan as of March 31, 2021 and December 31, 2020, was 6.95% and 7.00%, respectively.

Debt Covenants

    The term loan is governed by the terms of the Third A&R Credit Agreement, dated May 2019, which include customary affirmative and negative covenants and provide for customary events of default, including, nonpayment of principal or interest and failure to timely deliver financial statements. Under the Third A&R Credit Agreement, the financial covenant provides that the First Lien Net Leverage Ratio (as defined therein) may not exceed 2.75:1.0, for the four fiscal quarters ending December 31, 2021, and for all subsequent quarters, 2.25:1.0.

    The Third A&R Credit Agreement also includes certain limitations on the payment of cash dividends on the Company's common shares and provides for other restrictions on (subject to certain exceptions) liens, indebtedness (including guarantees and other contingent obligations), investments (including loans, advances and acquisitions), mergers and other fundamental changes and sales and other dispositions of property or assets, among others.

Debt - Series B Preferred Stock

The Series B Preferred Stock is a mandatorily redeemable financial instrument under ASC Topic 480 and has been recorded as a liability using the effective interest rate method for each tranche. The mandatory redemption date for all tranches of the Series B Preferred Stock is February 15, 2025.

The Series B Preferred Stock requires quarterly dividend payments calculated at a 12% annual rate on all outstanding Series B Preferred Stock when the Company’s First Lien Net Leverage Ratio (as defined in the Third A&R Credit Agreement) is less than or equal to 1.50:1.0 and a 13.5% rate if the ratio if greater. The Series B Preferred Stock agreements allow the Company to accrue, but not pay, the dividends at a 15.0% annual rate. Accrued dividends increase the amount of Series B Preferred Stock. Accrued dividends were $18.3 million at March 31, 2021 and December 31, 2020, respectively. Dividend payments are not deductible in calculating the Company’s federal and state income taxes.

Contractual Maturities

    Contractual maturities of the Company's outstanding principal on debt obligations as of March 31, 2021:

(in thousands)	Maturities
Remainder of 2021	$	1,821
2022	16,938
2023	29,986
2024	129,368
2025	129
Thereafter	—
Total contractual maturities	$	178,242

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Commitments and contingencies

3 Months Ended

Mar. 31, 2021

Commitments and Contingencies Disclosure [Abstract]

Commitments and contingencies

Commitments and Contingencies

    In the ordinary course of business, the Company enters into agreements that provide financing for its machinery and equipment, facility and vehicle needs. The Company reviews these agreements for potential lease classification, and at inception, determines whether a lease is an operating or finance lease. Lease assets and liabilities, which generally represent the present value of future minimum lease payments over the term of the lease, are recognized as of the commencement date. Under Topic 842, leases with an initial lease term of twelve months or less are classified as short-term leases and are not recognized in the condensed consolidated balance sheets unless the lease contains a purchase option that is reasonably certain to be exercised.

    Lease term, discount rate, variable lease costs and future minimum lease payment determinations require the use of judgment as these are based on the facts and circumstances related to each specific lease. Lease terms are generally based on their initial non-cancelable terms, unless there is a renewal option that is reasonably certain to be exercised. Various factors, including economic incentives, intent, past history and business need are considered to determine if a renewal option is reasonably certain to be exercised. The implicit rate in a lease agreement is used when it can be determined. Otherwise, the Company's incremental borrowing rate, which is based on information available as of the lease commencement date, including applicable lease terms and the current economic environment, is used to determine the value of the lease obligation.

Finance Leases

    The Company has obligations, exclusive of associated interest, under various finance leases for equipment totaling $51.8 million and $57.6 million at March 31, 2021 and December 31, 2020, respectively. Gross property under this capitalized lease agreement at March 31, 2021 and December 31, 2020, totaled $129.7 million and $128.0 million, less accumulated depreciation of $60.7 million and $55.1 million, respectively, for net balances of $69.0 million and $72.9 million, respectively. Depreciation expense for assets held under the finance leases is included in cost of revenue in the condensed consolidated statements of operations.

    The future minimum payments of finance lease obligations are as follows:

(in thousands)
Remainder of 2021	$	19,994
2022	21,996
2023	7,267
2024	3,264
2025	1,799
Thereafter	78
Future minimum lease payments	54,398
Less: Amount representing interest	(2,617)
Present value of minimum lease payments	51,781
Less: Current portion of finance lease obligations	24,728
Finance lease obligations, less current portion	$	27,053

Operating Leases

    In the ordinary course of business, the Company enters into non-cancelable operating leases for certain of its facilities, vehicles and equipment. The Company has obligations, exclusive of associated interest, totaling $36.5 million and $38.0 million at March 31, 2021 and December 31, 2020, respectively. Property under these operating lease agreements at March 31, 2021 and December 31, 2020, totaled $35.0 million and $36.5 million, respectively.

    The Company has long-term power-by-the-hour equipment rental agreements with a construction equipment manufacturer that have a guaranteed minimum monthly hour requirement. The minimum guaranteed amount based on the Company's current operations is $3.2 million per year. Total expense under these agreements are listed in the following table as variable lease costs.

    The future minimum payments under non-cancelable operating leases are as follows:

(in thousands)
Remainder of 2021	$	8,435
2022	9,753
2023	7,347
2024	3,532
2025	1,751
Thereafter	18,899
Future minimum lease payments	49,717
Less: Amount representing interest	(13,202)
Present value of minimum lease payments	36,515
Less: Current portion of operating lease obligations	8,779
Operating lease obligations, less current portion	$	27,736

Lease Information

	Three Months Ended
	March 31, 2021			March 31, 2020
Finance Lease cost:
Amortization of right-of-use assets	$	5,835		$	5,697
Interest on lease liabilities	817			1,186
Operating lease cost	3,394			3,478
Short-term lease cost	23,604			21,635
Variable lease cost	1,247			960
Sublease Income	(33)			(33)
Total lease cost	$	34,864		$	32,923
Other information:
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from finance leases	$	817		$	1,186
Operating cash flows from operating leases	$	3,245		$	3,342
Weighted-average remaining lease term - finance leases	2.41 years			2.73 years
Weighted-average remaining lease term - operating leases	8.17 years			8.02 years
Weighted-average discount rate - finance leases	6.18		%	6.49		%
Weighted-average discount rate - operating leases	7.00		%	7.14		%

Letters of Credit and Surety Bonds

    In the ordinary course of business, the Company is required to post letters of credit and surety bonds to customers in support of performance under certain contracts. Such letters of credit are generally issued by a bank or similar financial institution. The letter of credit or surety bond commits the issuer to pay specified amounts to the holder of the letter of credit or surety bond under certain conditions. If the letter of credit or surety bond issuer were required to pay any amount to a holder, the Company would be required to reimburse the issuer, which, depending upon the circumstances, could result in a charge to earnings. As of March 31, 2021, and December 31, 2020, the Company was contingently liable under letters of credit issued under its Third A&R Credit Agreement, in the amount of $22.0 million and $7.8 million, respectively, related to projects and insurance. In addition, as of March 31, 2021 and December 31, 2020, the Company had outstanding surety bonds on projects of $3.0 billion and $2.8 billion, respectively.

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Earnings per share

3 Months Ended

Mar. 31, 2021

Earnings Per Share [Abstract]

Earnings per share

Earnings Per Share

    The Company calculates earnings (loss) per share (“EPS”) in accordance with ASC Topic 260, Earnings per Share. Basic EPS is computed by dividing income (loss) available to common stockholders by the weighted average number of common shares of common stock outstanding during the period.

    Income (loss) available to common stockholders is computed by deducting the dividends accrued for the period on cumulative preferred stock from net income and net income allocated to participating securities. If there is a net loss, the amount of the loss is increased by those preferred dividends.

    Diluted EPS assumes the dilutive effect of (i) Series A cumulative convertible preferred stock, using the if-converted method, (ii) publicly traded warrants, (iii) Series B Preferred Stock - Warrants and (iv) the assumed exercise of in-the-money stock options and the assumed vesting of outstanding restricted stock units (“RSUs”), using the treasury stock method.

    Whether the Company has net income, or a net loss determines whether potential issuances of common stock are included in the diluted EPS computation or whether they would be anti-dilutive. As a result, if there is a net loss, diluted EPS is

computed in the same manner as basic EPS is computed. Similarly, if the Company has net income but its preferred dividend adjustment made in computing income available to common stockholders results in a net loss available to common stockholders, diluted EPS would be computed the same as basic EPS.

The calculations of basic and diluted EPS, are as follows:

	Three Months Ended
	March 31,
($ in thousands, except per share data)	2021		2020
Numerator:
Net loss	$	(20,434)	$	(12,743)
Less: Convertible Preferred Stock dividends	(656)		(766)
Net loss available to common stockholders	(21,090)		(13,509)
Denominator:
Weighted average common shares outstanding - basic and diluted	23,057,731		20,522,216
Anti-dilutive:
Convertible Series A Preferred	1,628,269		6,553,041
Merger Warrants (1)	3,074,481		—
Series B Preferred - Warrants (2)	7,684,057		7,675,325
Options (3)	426,824		—
RSUs (3)	1,958,045		1,456,359
Basic EPS	(0.91)		(0.66)
Diluted EPS	(0.91)		(0.66)

(1)     As of March 31, 2020, Merger Warrants to purchase 8,480,000 shares of common stock at $11.50 per share were not considered as dilutive as the warrants’ exercise price was not greater than the average market price of the common stock during the period. As of March 31, 2021, these warrants were calculated using the treasury stock method and were anti-dilutive.

(2)     Series B Preferred - Warrants are considered as participating securities because the holders are entitled to participate in any distributions similar to that of common shareholders.

(3)    As of March 31, 2020, there were 591,860 of vested and unvested options and 141,248 unvested RSUs, respectively. These were also not considered as dilutive as the respective exercise price or average stock price required for vesting of such awards was greater than the average market price of the common stock during the period.    

Merger Warrants

On August 4, 2015, M III formed a Special Purpose Acquisition Corporation and issued public and private warrants before the Merger with the Company. As of March 31, 2021, the Company had 16,925,160 Merger Warrants outstanding, of which 295,000 are considered private warrants. Two Merger Warrants, such warrants will be exercisable for one share of our Common Stock at $11.50 per share until the expiration on March 26, 2023. For further discussion about the valuation of the private warrants see Note 5. Fair Value of Financial Instruments.

Series B Preferred Stock Anti-dilution Warrants

The Company also had the following potential outstanding warrants related to the Series B Preferred Stock issuance.

•At March 31, 2021, a total of 495,762 warrants calculated on an if-converted method for the conversion                 of shares related to the outstanding Series A Preferred Stock. As discussed in Note 5. Fair Value of Financial

Instruments, these warrants are recorded as a liability. These warrants are not included in the weighted average share calculation as the contingent event (conversion of Series A Preferred Stock) had not occurred at the end of the quarter.

•The second set of additional warrants would be issued if the exercise of any warrant with an exercise price of $11.50 or higher.

•The final set of additional warrants would be issued if the exercise of any equity issued pursuant to the Company’s long term incentive plan or other equity plan with a strike price of $11.50 or higher.

Series A Preferred Stock

    As of March 31, 2021, we had 17,483 shares of Series A Preferred Stock with a stated value of $1,000 per share plus accumulated dividends. Dividends are paid on the Series A Preferred Stock as, if and when declared by our Board. To extent permitted, dividends are required to be paid in cash quarterly in arrears on each March 31, June 30, September 30 and December 31 on the stated value at a rate of 10% per annum.

    If not paid in cash, dividends will accrue on the stated value and will increase the stated value on and effective as of the applicable dividend date without any further action by the Board at 12% per annum.

    So long as any shares of Series B Preferred Stock of the Company are currently outstanding or from and after the occurrence of any non-payment event or default event and until cured or waived, the foregoing rates will increase by 2% per annum.

    As of March 31, 2021, the Company has accrued a cumulative of $5.0 million in dividends to the holder of Series A Preferred Stock as a reduction to additional paid-in capital.

Stock Compensation

    Under guidance of ASC Topic 718 “Compensation — Stock Compensation,” stock-based compensation expense is measured at the date of grant, based on the calculated fair value of the stock-based award, and is recognized as an expense over the employee’s requisite service period (generally the vesting period of the award).

    The fair value of the RSUs was based on the closing market price of our common stock on the date of the grant. Stock compensation expense for the RSUs is being amortized using the straight-line method over the service period. For the three months ended March 31, 2021 and 2020, we recognized $0.7 million and $1.1 million in compensation expense, respectively.

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Income taxes

3 Months Ended

Mar. 31, 2021

Income Tax Disclosure [Abstract]

Income taxes

Income Taxes

    The Company’s statutory federal tax rate was 21.00% for the periods ended March 31, 2021 and 2020, respectively. State tax rates for the same period vary among states and range from approximately 0.8% to 12.0%. A small number of states do not impose an income tax.

    The effective tax rates for the three months ended March 31, 2021 and 2020 were 10.5% and 6.4%, respectively. The difference between the Company’s effective tax rate and the federal statutory rate primarily results from permanent differences related to the interest accrued for the Series B Preferred Stock and executive compensation, which are not deductible for federal and state income taxes. There were no changes in uncertain tax positions during the periods ended March 31, 2021 and 2020.

    On March 27, 2020, the Coronavirus Aid, Relief, and Economic Security Act (the “CARES Act”) was enacted by the US Government in response to the COVID-19 pandemic to provide employment retention incentives. We do not believe that these relief measures materially affect the condensed consolidated financial statements for the last three quarters of 2020.

The Company has also made use of the payroll deferral provision to defer social security tax of approximately $13.6 million through December 31, 2020. Half of this amount is required to be paid on December 31, 2021 and the other half by December 31, 2022.

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Segments (Notes)

3 Months Ended

Mar. 31, 2021

Segments [Abstract]

Segment Reporting Disclosure

Segments

    We operate our business as two reportable segments: the Renewables segment and the Specialty Civil segment. Each of our reportable segments is comprised of similar business units that specialize in services unique to their respective markets. The classification of revenue and gross profit for segment reporting purposes can at times require judgment on the part of management. Our segments may perform services across industries or perform joint services for customers in multiple industries. To determine reportable segment gross profit, certain allocations, including allocations of shared and indirect costs, such as facility costs, equipment costs and indirect operating expenses, were made based on segment revenue.

    Separate measures of the Company’s assets, including capital expenditures and cash flows by reportable segment are not produced or utilized by management to evaluate segment performance. A substantial portion of the Company’s fixed assets are owned by and accounted for in our equipment department, including operating machinery, equipment and vehicles, as well as office equipment, buildings and leasehold improvements, and are used on an interchangeable basis across our reportable segments. As such, for reporting purposes, total under/over absorption of equipment expenses consisting primarily of depreciation is allocated to the Company's two reportable segments based on segment revenue.

The following is a brief description of the Company's reportable segments:

Renewables Segment

    The Renewables segment operates throughout the United States and specializes in a range of services for the power delivery, solar, wind and battery storage markets that includes design, procurement, construction, restoration, and maintenance.

Specialty Civil Segment

    The Specialty Civil segment operates throughout the United States and specializes in a range of services that include:

•Heavy civil construction services such as road and bridge construction, specialty paving, sports field development, industrial maintenance, outsourced contract mining and heavy hauling.

•Environmental remediation services such as site development, environmental site closure, and coal ash management.

•Rail infrastructure services such as planning, design, procurement, construction and maintenance of major railway and intermodal facilities.

Segment Revenue

    Revenue by segment was as follows:

	Three Months Ended March 31,
(in thousands)	2021				2020
Segment	Revenue		% of Total Revenue		Revenue		% of Total Revenue
Renewables	$	180,374	65.3	%	$	248,746	69.5	%
Specialty Civil	96,038		34.7	%	109,417		30.5	%
Total revenue	$	276,412	100.0	%	$	358,163	100.0	%

Segment Gross Profit

    Gross profit by segment was as follows:

	Three Months Ended March 31,
(in thousands)	2021				2020
Segment	Gross Profit		Gross Profit Margin		Gross Profit		Gross Profit Margin
Renewables	$	12,180	6.8	%	$	25,829	10.4	%
Specialty Civil	4,361		4.5	%	7,212		6.6	%
Total gross profit	$	16,541	6.0	%	$	33,041	9.2	%

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Investments, Equity Method and Joint Ventures

3 Months Ended

Mar. 31, 2021

Equity Method Investments and Joint Ventures [Abstract]

Equity Method Investments and Joint Ventures Disclosure

Joint Ventures

As of March 31, 2021, the Company did not have any VIEs but did have one joint venture that used the proportionate consolidation method at 25% ownership. The following balances were included in the condensed consolidated financial statements:

(in thousands)	March 31, 2021
Assets
Cash	$	5,455
Accounts receivable	3,963
Contract assets	1,446
Liabilities
Accounts payable	$	3,461
Contract liabilities	7,403
	Three Months Ended
	March 31, 2021
Revenue	$	4,501
Cost of revenue	4,501

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Related party transactions

3 Months Ended

Mar. 31, 2021

Related Party Transactions [Abstract]

Related party transactions

Related Party TransactionsOn February 9, 2021, Ares Management, LLC, on behalf of its affiliated funds, investment vehicles and/or managed accounts (“Ares”) purchased the outstanding Series B Preferred Stock and Series A Preferred Stock from funds managed by Oaktree Capital Management (“Oaktree”). As of March 31, 2021, Ares currently holds all of the outstanding Series B Preferred Stock, except for 350 shares, and all of the outstanding Series A Preferred Stock.

Related Party Shareholders

Type of Equity	Holder	Ownership Percentage
Series A Preferred Stock and Series A Conversion Warrants	Ares	100	%
Series B-1 Preferred Stock, Performance Warrants, Warrants at Closing (initial amount issued)	Ares	100	%
Series B-1 Warrants at Closing (initial amount issued), Exchange Warrants	Oaktree Power Opportunities Fund III Delaware, L.P.	100	%
Series B-2 and B-3 Preferred Stock, Warrants at Closing	Ares	100	%

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Business, Basis of Presentation and Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2021

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Segment Reporting, Policy

We segregate our business into two reportable segments: the Renewables segment and the Specialty Civil segment. See Note 10. Segments for a description of the reportable segments and their operations.

Consolidation, Policy

Principles of Consolidation

    The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States (“GAAP”) for interim financial information and with the instructions for Quarterly Reports on Form 10-Q and Rule 10-01 of Regulation S-X. Pursuant to these rules and regulations, certain information and footnote disclosures normally included in the annual audited consolidated financial statements prepared in accordance with GAAP have been condensed or omitted. Adjustments necessary to arrive at net income (loss) available for common stockholders, previously disclosed in Note 8. Earnings Per Share, have been added to the prior period presentation of the consolidated statements of operations to be comparable with the current period presentation.

    The unaudited condensed consolidated financial statements include the accounts of IEA and its wholly-owned domestic and foreign subsidiaries. The Company occasionally forms joint ventures with unrelated third parties for the execution of single contracts or projects. The Company assesses its joint ventures to determine if they meet the qualifications of a variable interest entity (“VIE”) in accordance with Accounting Standard Codification (“ASC”) Topic 810, Consolidation. For construction joint ventures that are not VIEs or fully consolidated but for which the Company has significant influence, the Company accounts for its interest in the joint ventures using the proportionate consolidation method, see Note 11. Joint Ventures.

In the opinion of management, these financial statements reflect all adjustments (consisting of normal recurring adjustments) that are necessary to present fairly the results of operations for the interim periods presented. The results of operations for the three months ended March 31, 2021 are not necessarily indicative of the results that may be expected for the year ending December 31, 2021. These financial statements should be read in conjunction with the Company’s audited consolidated financial statements for the year ended December 31, 2020 and notes thereto included in the Company’s 2020 Annual Report on Form 10-K.

Basis of Accounting, Policy

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with GAAP.

Use of Estimates, Policy

The preparation of the condensed consolidated financial statements in conformity with GAAP requires the use of estimates and assumptions that affect the amounts reported in the condensed consolidated financial statements and the accompanying notes. Key estimates include: the recognition of revenue and project profit or loss; fair value estimates; valuations of goodwill and intangible assets; asset lives used in computing depreciation and amortization; accrued self-insured claims; other reserves and accruals; accounting for income taxes; and the estimated impact of contingencies and ongoing litigation. While management believes that its estimates are reasonable when considered in conjunction with the Company’s consolidated financial position and results of operations, actual results could differ materially from those estimates.

Revenue

Revenue Recognition

    The Company derives revenue primarily from construction projects performed under contracts for specific projects requiring the construction and installation of an entire infrastructure system or specified units within an infrastructure system. Contracts contain multiple pricing options, such as fixed price, time and materials, or unit price. Generally, renewable energy projects are performed for private customers while Specialty Civil projects are performed for various governmental entities.

    Revenue derived from projects billed on a fixed-price basis totaled 96.2% and 96.0% of consolidated revenue from operations for the three months ended March 31, 2021 and 2020, respectively. Revenue and related costs for contracts billed on a time and materials basis are recognized as the services are rendered. Revenue derived from projects billed on a time and materials basis totaled 3.8% and 4.0% of consolidated revenue from operations for the three months ended March 31, 2021 and 2020, respectively.

    Construction contract revenue is recognized over time using the cost-to-cost measure of progress for fixed price contracts. The cost-to-cost measure of progress best depicts the continuous transfer of control of goods or services to the customer. The contractual terms provide that the customer compensates the Company for services rendered.

    Contract costs include all direct materials, labor and subcontracted costs, as well as indirect costs related to contract performance, such as indirect labor, supplies, tools, repairs and the costs of capital equipment. The cost estimation and review process for recognizing revenue over time under the cost-to-cost method is based on the professional knowledge and experience of the Company’s project managers, engineers and financial professionals. Management reviews estimates of total contract transaction price and total project costs on an ongoing basis. Changes in job performance, job conditions and management’s assessment of expected variable consideration are factors that influence estimates of the total contract transaction price, total costs to complete those contracts and profit recognition. Changes in these factors could result in revisions to revenue and costs of revenue in the period in which the revisions are determined on a prospective basis, which could materially affect the Company’s results of operations for that period. Provisions for losses on uncompleted contracts are recorded in the period in which such losses are determined.

Performance Obligations

    A performance obligation is a contractual promise to transfer a distinct good or service to the customer and is the unit of account under ASC Topic 606. The transaction price of a contract is allocated to distinct performance obligations and recognized as revenue when or as the performance obligations are satisfied. The Company’s contracts often require significant integrated services and, even when delivering multiple distinct services, are generally accounted for as a single performance obligation. Contract amendments and change orders are generally not distinct from the existing contract due to the significant integrated service provided in the context of the contract and are accounted for as a modification of the existing contract and performance obligation. With the exception of certain Specialty Civil service contracts, the majority of the Company’s performance obligations are generally completed within one year.

    When more than one contract is entered into with a customer on or close to the same date, the Company evaluates whether those contracts should be combined and accounted for as a single contract as well as whether those contracts should be accounted for as more than one performance obligation. This evaluation requires significant judgment and is based on the facts and circumstances of the various contracts, which could change the amount of revenue and profit recognition in a given period depending upon the outcome of the evaluation.

    Remaining performance obligations represent the amount of unearned transaction prices for contracts, including approved and unapproved change orders. As of March 31, 2021, the amount of the Company’s remaining performance obligations was $1,627.5 million. The Company expects to recognize approximately 67.7% of its remaining performance obligations as revenue during the next twelve months. Revenue recognized from performance obligations satisfied in previous periods was $0.4 million and $(2.0) million for the three months ended March 31, 2021 and 2020, respectively.

Variable Consideration

    Transaction pricing for the Company’s contracts may include variable consideration, such as unapproved change orders, claims, incentives and liquidated damages. Management estimates variable consideration for a performance obligation utilizing estimation methods that best predict the amount of consideration to which the Company will be entitled. Variable consideration is included in the estimated transaction price to the extent it is probable that a significant reversal of cumulative revenue recognized will not occur when the uncertainty associated with the variable consideration is resolved. Management’s estimates of variable consideration and determination of whether to include estimated amounts in transaction price are based on legal opinions, past practices with the customer, specific discussions, correspondence or preliminary negotiations with the customer and all other relevant information that is reasonably available. The effect of a change in variable consideration on the transaction price of a performance obligation is typically recognized as an adjustment to revenue on a cumulative catch-up basis. To the extent unapproved change orders, claims and liquidated damages reflected in transaction price are not resolved in the Company’s favor, or to the extent incentives reflected in transaction price are not earned, there could be reductions in, or reversals of, previously recognized revenue.

    As of March 31, 2021 and December 31, 2020, the Company included approximately $42.8 million and $52.6 million, respectively, of unapproved change orders and/or claims in the transaction price for certain contracts that were in the process of

being resolved in the normal course of business, including through negotiation, arbitration and other proceedings. These transaction price adjustments are included within Contract Assets or Contract Liabilities as appropriate. The Company actively engages with its customers to complete the final change order approval process, and generally expects these processes to be completed within one year. Amounts ultimately realized upon final acceptance by customers could be higher or lower than such estimated amounts.

Disaggregation of Revenue

    The following tables disaggregate revenue by customers and services performed, which the Company believes best depicts the nature, amount, timing and uncertainty of its revenue:

(in thousands)	Three Months Ended
	March 31, 2021		March 31, 2020
Renewables Segment
Wind	$	146,858	$	248,537
Solar	33,516		209
	$	180,374	$	248,746
Specialty Civil Segment
Heavy civil	$	48,871	$	41,222
Rail	26,868		47,057
Environmental	20,299		21,138
	$	96,038	$	109,417

Interest in Unincorporated Joint Ventures or Partnerships, Policy

Construction Joint Ventures

Certain contracts are executed through joint ventures. The arrangements are often formed for the execution of single contracts or projects and allow the Company to share risks and secure specialty skills required for project execution.

In accordance with ASC Topic 810, Consolidation the Company assesses its joint ventures at inception to determine if any meet the qualifications of a VIE. The Company considers a joint venture a VIE if either (a) the total equity investment is not sufficient to permit the entity to finance its activities without additional subordinated financial support, (b) characteristics of a controlling financial interest are missing (either the ability to make decisions through voting or other rights, the obligation to absorb the expected losses of the entity or the right to receive the expected residual returns of the entity), or (c) the voting rights of the equity holders are not proportional to their obligations to absorb the expected losses of the entity and/or their rights to receive the expected residual returns of the entity and substantially all of the entity’s activities either involve or are conducted on behalf of an investor that has disproportionately few voting rights. Upon the occurrence of certain events outlined in ASC 810, the Company reassesses its initial determination of whether the joint venture is a VIE.

The Company also evaluates whether it is the primary beneficiary of each VIE and consolidates the VIE if the Company has both (a) the power to direct the economically significant activities of the entity and (b) the obligation to absorb

losses of, or the right to receive benefits from, the entity that could potentially be significant to the VIE. The Company considers the contractual agreements that define the ownership structure, distribution of profits and losses, risks, responsibilities, indebtedness, voting rights and board representation of the respective parties in determining whether it qualifies as the primary beneficiary. The Company also considers all parties that have direct or implicit variable interests when determining whether it is the primary beneficiary. When the Company is determined to be the primary beneficiary, the VIE is consolidated. In accordance with ASC 810, management’s assessment of whether the Company is the primary beneficiary of a VIE is performed continuously.

Construction joint ventures that do not involve a VIE, or for which the Company is not the primary beneficiary, are evaluated for consolidation under the voting interest model that considers whether the Company owns or controls more than 50% of the voting interest in the joint venture. For construction joint ventures that are not consolidated but for which the Company has significant influence, the Company accounts for its interest in the joint ventures using the proportionate consolidation method, whereby the Company’s proportionate share of the joint ventures’ assets, liabilities, revenue and cost of operations are included in the appropriate classifications in the Company’s consolidated financial statements. See Note 11. Joint Ventures for additional discussion regarding joint ventures.

New Accounting Pronouncements, Policy

Recently Adopted Accounting Standards - Guidance Adopted in 2020

In December 2019, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2019-12, “Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes,” which removes certain exceptions to the general principles in Topic 740 and also clarifies and amends existing guidance to improve consistent application. This ASU is effective for fiscal years beginning after December 15, 2020, and interim periods within those fiscal years. Depending on the amendment, adoption may be applied on the retrospective, modified retrospective, or prospective basis. The Company adopted the standard on January 1, 2021 on a prospective basis, which did not have an impact on our disclosures for income taxes.

Recently Issued Accounting Standards Not Yet Adopted

    In June 2016, the FASB issued ASU 2016-13, “Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments,” which introduced an expected credit loss methodology for the measurement and recognition of credit losses on most financial assets, including trade accounts receivables. The expected credit loss methodology under ASU 2016-13 is based on historical experience, current conditions and reasonable and supportable forecasts, and replaces the probable/incurred loss model for measuring and recognizing expected losses under current GAAP. The ASU also requires disclosure of information regarding how a company developed its allowance, including changes in the factors that influenced management’s estimate of expected credit losses and the reasons for those changes. The ASU and its related clarifying updates are effective for smaller reporting companies for fiscal years beginning after December 15, 2022, and interim periods within those fiscal years, with early adoption permitted. The Company is still evaluating the new standard but do not expect it to have a material impact on our estimate of the allowance for uncollectable accounts.

Management has evaluated other recently issued accounting pronouncements and does not believe that they will have a significant impact on the financial statements and related disclosures.

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Business, Basis of Presentation and Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2021

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Disaggregation of Revenue

The following tables disaggregate revenue by customers and services performed, which the Company believes best depicts the nature, amount, timing and uncertainty of its revenue:

(in thousands)	Three Months Ended
	March 31, 2021		March 31, 2020
Renewables Segment
Wind	$	146,858	$	248,537
Solar	33,516		209
	$	180,374	$	248,746
Specialty Civil Segment
Heavy civil	$	48,871	$	41,222
Rail	26,868		47,057
Environmental	20,299		21,138
	$	96,038	$	109,417

Schedule of revenue and accounts receivable concentrations, net of allowances

The Company had the following approximate revenue and accounts receivable concentrations, net of allowances, for the periods ended:

	Revenue %
	Three Months Ended			Accounts Receivable %
	March 31, 2021	March 31, 2020		March 31, 2021	December 31, 2020
Company A (Renewables Segment)	*	11.5	%	*	*
Company B (Renewables Segment)	*	11.1	%	*	*

* Amount was not above 10% threshold

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Contract Assets and Liabilities (Tables)

3 Months Ended

Mar. 31, 2021

Contractors [Abstract]

Contract Assets and Contract Liabilities

(in thousands)	March 31, 2021		December 31, 2020
Costs and estimated earnings in excess of billings on uncompleted contracts	$	60,132	$	51,367
Retainage receivable	86,564		93,816
	$	146,696	$	145,183

    Contract liabilities consist of the following:

(in thousands)	March 31, 2021		December 31, 2020
Billings in excess of costs and estimated earnings on uncompleted contracts	$	141,231	$	117,641
Loss on contracts in progress	189		594
	$	141,420	$	118,235

Accounts Receivable, Allowance for Credit Loss

Activity in the allowance for doubtful accounts for the periods indicated was as follows:

	Three Months Ended
	March 31,
(in thousands)	2021		2020
Allowance for doubtful accounts at beginning of period	$	—	$	75
Plus: provision for (reduction in) allowance	—		14
Less: write-offs, net of recoveries	—		—
Allowance for doubtful accounts at period end	$	—	$	89

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Property, plant and equipment, net (Tables)

3 Months Ended

Mar. 31, 2021

Property, Plant and Equipment [Abstract]

Schedule of property plant and equipment

Property, plant and equipment consisted of the following:

(in thousands)	March 31, 2021		December 31, 2020
Buildings and leasehold improvements	$	4,890	$	4,402
Land	17,600		17,600
Construction equipment	197,057		192,402
Office equipment, furniture and fixtures	3,637		3,620
Vehicles	7,426		7,326
	230,610		225,350
Accumulated depreciation	(103,346)		(94,604)
Property, plant and equipment, net	$	127,264	$	130,746

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Goodwill and Intangible Assets, net (Tables)

3 Months Ended

Mar. 31, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

The following table provides the changes in the carrying amount of goodwill, by segment:

(in thousands)	Renewables		Specialty Civil		Total
January 1, 2020	$	3,020	$	34,353	$	37,373
Adjustments	—		—		—
December 31, 2020	$	3,020	$	34,353	$	37,373
Adjustments	—		—		—
March 31, 2021	$	3,020	$	34,353	$	37,373

Schedule of Finite-Lived Intangible Assets

Intangible assets consisted of the following as of the dates indicated:

	March 31, 2021							December 31, 2020
($ in thousands)	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Weighted Average Remaining Life	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Weighted Average Remaining Life
Customer relationships	$	26,500	$	(9,427)	$	17,073	4.75 years	$	26,500	$	(8,481)	$	18,019	5 years
Trade name	13,400		(6,655)		6,745		2.75 years	13,400		(5,985)		7,415		3 years
	$	53,800	$	(29,982)	$	23,818		$	53,800	$	(28,366)	$	25,434

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense

The following table provides the annual intangible amortization expense currently expected to be recognized for the years 2021 through 2025:

(in thousands)	Remainder of 2021		2022		2023		2024		2025
Amortization expense	$	4,849	$	6,466	$	5,841	$	3,785	$	2,876

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Fair value of financial instruments (Tables)

3 Months Ended

Mar. 31, 2021

Fair Value Disclosures [Abstract]

Schedule of fair value of liabilities measured on recurring basis

The following table sets forth information regarding the Company's liabilities measured at fair value on a recurring basis:    

	March 31, 2021								December 31, 2020
(in thousands)	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Liabilities
Private warrants	$	—	$	1,000	$	—	$	1,000	$	—	$	—	$	—	$	—
Series B Preferred Stock - Anti-dilution warrants	—		—		8,100		8,100		—		—		8,800		8,800
Series B-1 Preferred Stock - Performance warrants	—		—		400		400		—		—		400		400
Total liabilities	$	—	$	1,000	$	8,500	$	9,500	$	—	$	—	$	9,200	$	9,200

Schedule of reconciliation of fair value unobservable liabilities measured on recurring basis

The following is a reconciliation of the beginning and ending balances of recurring fair value measurements using Level 3 inputs:

(in thousands)	Series B Preferred Stock - Anti-dilution warrants		Series B-1 Preferred Stock - Performance warrants
Beginning Balance, December 31, 2020	$	8,800	$	400
Fair value adjustment - loss (gain) recognized in other income	(700)		—
Ending Balance, March 31, 2021	$	8,100	$	400

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Debt and Series B Preferred Stock (Tables)

3 Months Ended

Mar. 31, 2021

Debt Disclosure [Abstract]

Schedule of debt

Debt consisted of the following obligations as of:

(in thousands)	March 31, 2021		December 31, 2020
Term loan	$	173,345	$	173,345
Commercial equipment notes	4,897		5,582
Total principal due for long-term debt	178,242		178,927
Unamortized debt discount and issuance costs	(15,634)		(17,196)
Less: Current portion of long-term debt	(2,379)		(2,506)
Long-term debt, less current portion	$	160,229	$	159,225
Debt - Series B Preferred Stock	$	185,998	$	185,396
Unamortized debt discount and issuance costs	(10,834)		(11,528)
Long-term Series B Preferred Stock	$	175,164	$	173,868

Contractual maturities of debt and capital lease obligations

Contractual Maturities

    Contractual maturities of the Company's outstanding principal on debt obligations as of March 31, 2021:

(in thousands)	Maturities
Remainder of 2021	$	1,821
2022	16,938
2023	29,986
2024	129,368
2025	129
Thereafter	—
Total contractual maturities	$	178,242

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Commitments and contingencies (Tables)

3 Months Ended

Mar. 31, 2021

Commitments and Contingencies Disclosure [Abstract]

Schedule of Future Minimum Lease Payments for Capital Leases

The future minimum payments of finance lease obligations are as follows:

(in thousands)
Remainder of 2021	$	19,994
2022	21,996
2023	7,267
2024	3,264
2025	1,799
Thereafter	78
Future minimum lease payments	54,398
Less: Amount representing interest	(2,617)
Present value of minimum lease payments	51,781
Less: Current portion of finance lease obligations	24,728
Finance lease obligations, less current portion	$	27,053

Schedule of Future Minimum Rental Payments for Operating Leases

The future minimum payments under non-cancelable operating leases are as follows:

(in thousands)
Remainder of 2021	$	8,435
2022	9,753
2023	7,347
2024	3,532
2025	1,751
Thereafter	18,899
Future minimum lease payments	49,717
Less: Amount representing interest	(13,202)
Present value of minimum lease payments	36,515
Less: Current portion of operating lease obligations	8,779
Operating lease obligations, less current portion	$	27,736

Schedule of Additional Lease Information

Lease Information

	Three Months Ended
	March 31, 2021			March 31, 2020
Finance Lease cost:
Amortization of right-of-use assets	$	5,835		$	5,697
Interest on lease liabilities	817			1,186
Operating lease cost	3,394			3,478
Short-term lease cost	23,604			21,635
Variable lease cost	1,247			960
Sublease Income	(33)			(33)
Total lease cost	$	34,864		$	32,923
Other information:
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from finance leases	$	817		$	1,186
Operating cash flows from operating leases	$	3,245		$	3,342
Weighted-average remaining lease term - finance leases	2.41 years			2.73 years
Weighted-average remaining lease term - operating leases	8.17 years			8.02 years
Weighted-average discount rate - finance leases	6.18		%	6.49		%
Weighted-average discount rate - operating leases	7.00		%	7.14		%

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Earnings per share (Tables)

3 Months Ended

Mar. 31, 2021

Earnings Per Share [Abstract]

Schedule of basic and diluted EPS

The calculations of basic and diluted EPS, are as follows:

	Three Months Ended
	March 31,
($ in thousands, except per share data)	2021		2020
Numerator:
Net loss	$	(20,434)	$	(12,743)
Less: Convertible Preferred Stock dividends	(656)		(766)
Net loss available to common stockholders	(21,090)		(13,509)
Denominator:
Weighted average common shares outstanding - basic and diluted	23,057,731		20,522,216
Anti-dilutive:
Convertible Series A Preferred	1,628,269		6,553,041
Merger Warrants (1)	3,074,481		—
Series B Preferred - Warrants (2)	7,684,057		7,675,325
Options (3)	426,824		—
RSUs (3)	1,958,045		1,456,359
Basic EPS	(0.91)		(0.66)
Diluted EPS	(0.91)		(0.66)

(1)     As of March 31, 2020, Merger Warrants to purchase 8,480,000 shares of common stock at $11.50 per share were not considered as dilutive as the warrants’ exercise price was not greater than the average market price of the common stock during the period. As of March 31, 2021, these warrants were calculated using the treasury stock method and were anti-dilutive.

(2)     Series B Preferred - Warrants are considered as participating securities because the holders are entitled to participate in any distributions similar to that of common shareholders.

(3)    As of March 31, 2020, there were 591,860 of vested and unvested options and 141,248 unvested RSUs, respectively. These were also not considered as dilutive as the respective exercise price or average stock price required for vesting of such awards was greater than the average market price of the common stock during the period.

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Segments (Tables)

3 Months Ended

Mar. 31, 2021

Segments [Abstract]

Reconciliation of Revenue from Segments to Consolidated

Segment Revenue

    Revenue by segment was as follows:

	Three Months Ended March 31,
(in thousands)	2021				2020
Segment	Revenue		% of Total Revenue		Revenue		% of Total Revenue
Renewables	$	180,374	65.3	%	$	248,746	69.5	%
Specialty Civil	96,038		34.7	%	109,417		30.5	%
Total revenue	$	276,412	100.0	%	$	358,163	100.0	%

Reconciliation of Other Significant Reconciling Items from Segments to Consolidated

Segment Gross Profit

    Gross profit by segment was as follows:

	Three Months Ended March 31,
(in thousands)	2021				2020
Segment	Gross Profit		Gross Profit Margin		Gross Profit		Gross Profit Margin
Renewables	$	12,180	6.8	%	$	25,829	10.4	%
Specialty Civil	4,361		4.5	%	7,212		6.6	%
Total gross profit	$	16,541	6.0	%	$	33,041	9.2	%

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Investments, Equity Method and Joint Ventures (Tables)

3 Months Ended

Mar. 31, 2021

Equity Method Investments and Joint Ventures [Abstract]

Schedule of Operating Activities of Joint Ventures

As of March 31, 2021, the Company did not have any VIEs but did have one joint venture that used the proportionate consolidation method at 25% ownership. The following balances were included in the condensed consolidated financial statements:

(in thousands)	March 31, 2021
Assets
Cash	$	5,455
Accounts receivable	3,963
Contract assets	1,446
Liabilities
Accounts payable	$	3,461
Contract liabilities	7,403
	Three Months Ended
	March 31, 2021
Revenue	$	4,501
Cost of revenue	4,501

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Related party transactions (Tables)

3 Months Ended

Mar. 31, 2021

Related Party Transactions [Abstract]

Schedule of related party shareholders

Related Party Shareholders

Type of Equity	Holder	Ownership Percentage
Series A Preferred Stock and Series A Conversion Warrants	Ares	100	%
Series B-1 Preferred Stock, Performance Warrants, Warrants at Closing (initial amount issued)	Ares	100	%
Series B-1 Warrants at Closing (initial amount issued), Exchange Warrants	Oaktree Power Opportunities Fund III Delaware, L.P.	100	%
Series B-2 and B-3 Preferred Stock, Warrants at Closing	Ares	100	%

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Business, Basis of Presentation and Significant Accounting Policies Disaggregation of Revenue (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2021 USD ($)	Mar. 31, 2020 USD ($)
Disaggregation of Revenue [Line Items]
Number of Reportable Segments	2
Revenue	$ 276,412	$ 358,163
Wind Revenue
Disaggregation of Revenue [Line Items]
Revenue	146,858	248,537
Solar Revenue
Disaggregation of Revenue [Line Items]
Revenue	33,516	209
Heavy Civil Revenue
Disaggregation of Revenue [Line Items]
Revenue	48,871	41,222
Rail Construction Revenue
Disaggregation of Revenue [Line Items]
Revenue	26,868	47,057
Environmental Revenue
Disaggregation of Revenue [Line Items]
Revenue	20,299	21,138
Renewables Segment
Disaggregation of Revenue [Line Items]
Revenue	180,374	248,746
Specialty Civil Segment
Disaggregation of Revenue [Line Items]
Revenue	$ 96,038	$ 109,417

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Business, Basis of Presentation and Significant Accounting Policies Schedule of concentrations for revenue and accounts receivable (Details) - Product Concentration Risk - Revenue Benchmark	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Fixed-price Contract
Concentration Risk [Line Items]
Concentration Risk, Percentage	96.20%	96.00%
Time-and-materials Contract
Concentration Risk [Line Items]
Concentration Risk, Percentage	3.80%	4.00%
Concentration Company A
Concentration Risk [Line Items]
Concentration Risk, Percentage		11.50%
Concentration Company B
Concentration Risk [Line Items]
Concentration Risk, Percentage		11.10%

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Business, Basis of Presentation and Significant Accounting Policies Revenue 606 (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 1,627,500
Revenue, Remaining Performance Obligation, Percentage	67.70%
Contract with Customer, Performance Obligation Satisfied in Previous Period	$ 400	$ (2,000)
Contract with Customer, Revenue Recognized, Related to Unapproved Change Orders and Claims	$ 42,800		$ 52,600
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	12 months

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Contract Assets and Liabilities Contract Assets and Contract Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Contractors [Abstract]
Unbilled Contracts Receivable	$ 60,132	$ 51,367
Construction Contractor, Receivable, Retainage	86,564	93,816
Contract Assets	146,696	145,183
Deferred Revenue	141,231	117,641
Provision for Loss on Contracts	189	594
Contract Liabilities	141,420	$ 118,235
Contract with Customer, Liability, Revenue Recognized	$ 87,800

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Contract Assets and Liabilities Activity in allowance for doubtful accounts (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Receivables [Abstract]
Accounts Receivable, Allowance for Credit Loss, Beginning of Period	$ 0	$ 75
Accounts Receivable, Allowance for Credit Loss, Writeoff	0	14
Accounts Receivable, Credit Loss Expense (Reversal)	0	0
Accounts Receivable, Allowance for Credit Loss, End of Period	$ 0	$ 89

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Property, plant and equipment, net (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 230,610		$ 225,350
Accumulated depreciation	(103,346)		(94,604)
Property, plant and equipment, net	127,264		130,746
Depreciation expense	9,183	$ 8,516
Buildings and leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	4,890		4,402
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	17,600		17,600
Construction equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	197,057		192,402
Office equipment, furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	3,637		3,620
Vehicles
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 7,426		$ 7,326

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Goodwill and Intangible Assets, net (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Goodwill [Line Items]
Goodwill, Beginning Balance	$ 37,373	$ 37,373
Goodwill, Period Increase (Decrease)	0	0
Goodwill, Ending Balance	37,373	37,373
Renewables Segment
Goodwill [Line Items]
Goodwill, Beginning Balance	3,020	3,020
Goodwill, Period Increase (Decrease)	0	0
Goodwill, Ending Balance	3,020	3,020
Specialty Civil Segment
Goodwill [Line Items]
Goodwill, Beginning Balance	34,353	34,353
Goodwill, Period Increase (Decrease)	0	0
Goodwill, Ending Balance	$ 34,353	$ 34,353

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Goodwill and Intangible Assets, net Schedule of intangible assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 53,800		$ 53,800
Accumulated Amortization	(29,982)		(28,366)
Net Book Value	23,818		25,434
Amortization of Intangible Assets	1,600	$ 3,400
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	26,500		26,500
Accumulated Amortization	(9,427)		(8,481)
Net Book Value	$ 17,073		18,019
Weighted Average Useful Life	4 years 9 months	5 years
Trade name
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 13,400		13,400
Accumulated Amortization	(6,655)		(5,985)
Net Book Value	$ 6,745		$ 7,415
Weighted Average Useful Life	2 years 9 months	3 years

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Goodwill and Intangible Assets, net Schedule of annual expected amortization expense (Details) $ in Thousands	Mar. 31, 2021 USD ($)
Finite-Lived Intangible Assets [Line Items]
Remainder of 2021	$ 4,849
2022	6,466
2023	5,841
2024	3,785
2025	$ 2,876

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Fair value of financial instruments - Fair Value Liabilities Measured on Recurring Basis (Details) - Recurring - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Obligations, Fair Value Disclosure	$ 9,500	$ 9,200
Merger Warrants - Private
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Obligations, Fair Value Disclosure	1,000	0
Series B Preferred - Series A Conversion Warrants
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Obligations, Fair Value Disclosure	8,100	8,800
Series B-1 Preferred Stock 6% Warrants
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Obligations, Fair Value Disclosure	400	400
Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Obligations, Fair Value Disclosure	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Merger Warrants - Private
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Obligations, Fair Value Disclosure	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Series B Preferred - Series A Conversion Warrants
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Obligations, Fair Value Disclosure	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Series B-1 Preferred Stock 6% Warrants
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Obligations, Fair Value Disclosure	0	0
Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Obligations, Fair Value Disclosure	1,000	0
Significant Other Observable Inputs (Level 2) | Merger Warrants - Private
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Obligations, Fair Value Disclosure	1,000	0
Significant Other Observable Inputs (Level 2) | Series B Preferred - Series A Conversion Warrants
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Obligations, Fair Value Disclosure	0	0
Significant Other Observable Inputs (Level 2) | Series B-1 Preferred Stock 6% Warrants
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Obligations, Fair Value Disclosure	0	0
Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Obligations, Fair Value Disclosure	8,500	9,200
Significant Unobservable Inputs (Level 3) | Merger Warrants - Private
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Obligations, Fair Value Disclosure	0	0
Significant Unobservable Inputs (Level 3) | Series B Preferred - Series A Conversion Warrants
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Obligations, Fair Value Disclosure	8,100	8,800
Significant Unobservable Inputs (Level 3) | Series B-1 Preferred Stock 6% Warrants
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Obligations, Fair Value Disclosure	$ 400	$ 400

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Fair value of financial instruments - Reconciliation of Level 3 Inputs (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2021 USD ($)
Series B Preferred - Series A Conversion Warrants
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance, December 31, 2020	$ 8,800
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings	(700)
Ending Balance, March 31, 2021	8,100
Series B-1 Preferred Stock 6% Warrants
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance, December 31, 2020	400
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings	0
Ending Balance, March 31, 2021	$ 400

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Fair value of financial instruments - Fair Value (Details) shares in Thousands	Mar. 31, 2021 shares	May 20, 2019 numberOfDays $ / shares
Series B Preferred Stock Warrants at closing
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Series B Preferred Stock Warrant Exercise Price | $ / shares		$ 0.0001
30-DAY VWAP | numberOfDays		30
Merger Warrants - Private
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Merger Warrants - Private | shares	295

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Debt and Series B Preferred Stock - Long-Term Debt (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Total principal due for long-term debt	$ 178,242	$ 178,927
Debt Issuance Costs, Net	(15,634)	(17,196)
Long-term Debt, Current Maturities	(2,379)	(2,506)
Long-term debt, less current portion	160,229	159,225
Debt - Series B Preferred Stock	175,164	173,868
Term Loan
Debt Instrument [Line Items]
Total principal due for long-term debt	173,345	173,345
Series B Preferred Stock Liability
Debt Instrument [Line Items]
Total principal due for long-term debt	185,998	185,396
Debt Issuance Costs, Net	(10,834)	(11,528)
Commercial equipment notes
Debt Instrument [Line Items]
Total principal due for long-term debt	$ 4,897	$ 5,582

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Debt and Series B Preferred Stock- Narrative (Details)	3 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Debt Covenant Period, Period Three | Third A&R Credit Agreement
Debt Instrument [Line Items]
Debt Instrument, Covenant Terms, Maximum First Lien Net Leverage Ratio	2.75
Debt Covenant Period, Period Four | Third A&R Credit Agreement
Debt Instrument [Line Items]
Debt Instrument, Covenant Terms, Maximum First Lien Net Leverage Ratio	2.25
Term Loan
Debt Instrument [Line Items]
Debt, Weighted Average Interest Rate	6.95%	7.00%

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Debt and Series B Preferred Stock - Series B Preferred Stock (Details) - Series B Preferred Stock - USD ($) $ in Thousands	Mar. 31, 2021	Nov. 14, 2019
Preferred Debt Details [Line Items]
Dividend Rate after 1.5:1.0 leverage		12.00%
Ratio Net Leverage Ratio for Deleveraging Event		1.50
Preferred Stock Paid In Kind Dividend Rate		15.00%
Series B Cash Dividend Rate after Deleveraging		13.50%
Dividends Payable	$ 18,300

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Debt and Series B Preferred Stock- Long Term Debt Obligations (Details) $ in Thousands	Mar. 31, 2021 USD ($)
Debt Disclosure [Abstract]
Remainder of 2021	$ 1,821
2022	16,938
2023	29,986
2024	129,368
2025	129
Thereafter	0
Contractual Obligation	$ 178,242

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Commitments and contingencies - Lease Narrative (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Finance Lease, Liability	$ 51,781	$ 57,600
Finance leased assets, gross	129,700	128,000
Finance leased assets, accumulated depreciation	(60,700)	(55,100)
Finance leased assets, net	69,000	72,900
Operating Lease, Liability	36,515	38,000
Operating Lease, Right-of-Use Asset	34,994	$ 36,461
Other Commitments, Future Minimum Payments, Remainder of Fiscal Year	$ 3,200

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Commitments and contingencies Future minimum payments of finance leases (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Commitments and Contingencies Disclosures [Abstract]
Remainder of 2021	$ 19,994
2022	21,996
2023	7,267
2024	3,264
2025	1,799
Thereafter	78
Finance minimum lease payments	54,398
Less: Amount representing interest	(2,617)
Present Value of Minimum Lease Payments	51,781	$ 57,600
Current portion of finance lease obligations	24,728	25,423
Finance lease obligations, less current portion	$ 27,053	$ 32,146

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Commitments and contingencies Future mimum payments of operating leases (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Commitments and Contingencies Disclosures [Abstract]
Remainder of 2021	$ 8,435
2022	9,753
2023	7,347
2024	3,532
2025	1,751
Thereafter	18,899
Lessee, Operating Lease, Liability, Payments, Due	49,717
Operating Leases, Future Minimum Payments, Interest Included in Payments	(13,202)
Operating Lease, Liability	36,515	$ 38,000
Operating Lease, Liability, Current	8,779	8,835
Operating Lease, Liability, Noncurrent	$ 27,736	$ 29,154

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Commitments and contingencies Schedule of Additional Lease Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Additional Lease Information [Abstract]
Finance Lease, Right-of-Use Asset, Amortization	$ 5,835	$ 5,697
Finance Lease, Interest Expense	817	1,186
Operating Leases, Rent Expense, Net	3,394	3,478
Short-term Lease, Cost	23,604	21,635
Variable Lease, Cost	1,247	960
Sublease Income	(33)	(33)
Lease, Cost	34,864	32,923
Operating Cashflow Finance Leases	817	1,186
Operating cashflow from operating leases	$ 3,245	$ 3,342
Finance Lease, Weighted Average Remaining Lease Term	2 years 4 months 28 days	2 years 8 months 23 days
Operating Lease, Weighted Average Remaining Lease Term	8 years 2 months 1 day	8 years 7 days
Finance Lease, Weighted Average Discount Rate, Percent	6.18%	6.49%
Operating Lease, Weighted Average Discount Rate, Percent	7.00%	7.14%

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Other Commitments and contingencies (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Other Commitments [Line Items]
Letters of Credit Outstanding, Amount	$ 22.0	$ 7.8
Special Assessment Bond	$ 3,000.0	$ 2,800.0

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Earnings per share - Basic and Diluted EPS (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Numerator:
Net loss	$ (20,434)	$ (12,743)
Less: Convertible Preferred Stock dividends	(656)	(766)
Net loss available to common stockholders	$ (21,090)	$ (13,509)
Denominator:
Weighted Average Number of Shares Outstanding, Basic and Diluted	23,057,731	20,522,216
Basic EPS (in dollars per share)	$ (0.91)	$ (0.66)
Diluted EPS (in dollars per share)	$ (0.91)	$ (0.66)
Redeemable Preferred Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Incremental Common Shares Attributable to Dilutive Effect of Conversion of Preferred Stock	1,628,269	6,553,041
Merger Warrants
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Incremental Common Shares Attributable to Dilutive Effect of Call Options and Warrants	3,074,481	0
Antidilutive securities excluded from computation of earnings per share, amount		8,480,000
Class of Warrant or Right, Exercise Price of Warrants or Rights	$ 11.50	$ 11.50
Warrants for Common Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Incremental Common Shares Attributable to Dilutive Effect of Call Options and Warrants	7,684,057	7,675,325
Equity Option
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	426,824	0
Restricted Stock Units (RSUs)
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	1,958,045	1,456,359
Antidilutive securities excluded from computation of earnings per share, amount		141,248
Share-based Payment Arrangement, Option
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount		591,860

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Earnings per share - Narrative (Details) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020	May 20, 2019
Class of Stock [Line Items]
Preferred stock, shares issued (in shares)	17,483		17,483
Preferred stock, par value (in dollars per share)	$ 0.0001		$ 0.0001
Share-based compensation expense	$ 727,000	$ 1,113,000
Merger Warrants
Class of Stock [Line Items]
Merger Warrants	16,925,160
Class of Warrant or Right, Exercise Price of Warrants or Rights	$ 11.50	$ 11.50
Merger Warrants - Private	295,000
Series B Preferred Stock Warrants at closing
Class of Stock [Line Items]
Anti-dilution Warrants	495,762
Exercise price of securities excluded at closing				$ 11.50
Series A Preferred Stock
Class of Stock [Line Items]
Preferred stock, shares issued (in shares)	17,483
Preferred stock, par value (in dollars per share)	$ 1,000
Preferred stock, dividend rate thereafter	10.00%
Series A Preferred PIK Dividend Rate 18 mos	12.00%
Default Rate for Uncured Dividends	2.00%
Dividends Payable	$ 5,000,000.0

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Income taxes (Details) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Income Tax Contingency [Line Items]
Statutory federal tax rate	21.00%
Effective tax rates	10.50%	6.40%
Increase (decrease) in uncertain tax positions	$ 0
Tax Cuts and Jobs Act, Change in Tax Rate, Deferred Tax Liability, Income Tax Benefit			$ 13,600,000
Minimum
Income Tax Contingency [Line Items]
State tax rate	0.80%
Maximum
Income Tax Contingency [Line Items]
State tax rate	12.00%

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Segments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Segment Reporting Information [Line Items]
Revenue	$ 276,412	$ 358,163
Segment revenue as a percentage of total revenue	100.00%	100.00%
Gross Profit	$ 16,541	$ 33,041
Gross Profit Margin	6.00%	9.20%
Renewables Segment
Segment Reporting Information [Line Items]
Revenue	$ 180,374	$ 248,746
Segment revenue as a percentage of total revenue	65.30%	69.50%
Gross Profit	$ 12,180	$ 25,829
Gross Profit Margin	6.80%	10.40%
Specialty Civil Segment
Segment Reporting Information [Line Items]
Revenue	$ 96,038	$ 109,417
Segment revenue as a percentage of total revenue	34.70%	30.50%
Gross Profit	$ 4,361	$ 7,212
Gross Profit Margin	4.50%	6.60%

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Investments, Equity Method and Joint Ventures (Details) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Schedule of Operating Activities of Joint Ventures [Line Items]
Cash and cash equivalents	$ 95,173,000		$ 164,041,000
Accounts receivable, net	171,306,000		163,793,000
Contract Assets	146,696,000		145,183,000
Accounts Payable, Current	86,826,000		104,960,000
Contract Liabilities	141,420,000		$ 118,235,000
Revenue	276,412,000	$ 358,163,000
Cost of revenue	259,871,000	$ 325,122,000
Noncontrolling Interest in Joint Ventures	0.25
Rail Joint Venture Member
Schedule of Operating Activities of Joint Ventures [Line Items]
Cash and cash equivalents	5,455,000
Accounts receivable, net	3,963,000
Contract Assets	1,446,000
Accounts Payable, Current	3,461,000
Contract Liabilities	7,403,000
Revenue	4,501,000
Cost of revenue	$ 4,501,000

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Related party transactions (Details)	Mar. 31, 2021 shares
Related Party Transaction [Line Items]
Series B Preferred Stock	350
Series B Preferred Stock | Ares
Related Party Transaction [Line Items]
Series B Preferred Equity Agreement - All Equity Ares	100.00%
Series B Preferred Stock | Oaktree
Related Party Transaction [Line Items]
Series B Preferred Equity Agreement - All Equity Oaktree	100.00%
Series B-2 Preferred Stock | Ares
Related Party Transaction [Line Items]
Series B Preferred Equity Agreement - All Equity Ares	100.00%
Series A Preferred Stock | Ares
Related Party Transaction [Line Items]
Series A Preferred Stock and Series A Conversion Warrants	100.00%