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 September 30, 2018

OR

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

Commission File Number 001-37839

TPI Composites, Inc.

(Exact name of registrant as specified in its charter)

Delaware	20-1590775
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification Number)

8501 N. Scottsdale Rd.

Gainey Center II, Suite 100

Scottsdale, AZ 85253

(480) 305-8910

(Address, including zip code, and telephone number,

including area code, of registrant’s principal executive offices)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the Registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  ☒    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 Exchange Act).    Yes  ☐    No  ☒

As of October 31, 2018, there were 34,510,890 shares of common stock outstanding.

TPI COMPOSITES, INC. AND SUBSIDIARIES

INDEX

		Page
PART I. FINANCIAL INFORMATION
ITEM 1.	Condensed Consolidated Financial Statements (Unaudited)
	Condensed Consolidated Balance Sheets as of September 30, 2018 and December 31, 2017	1
	Condensed Consolidated Statements of Operations for the Three and Nine Months Ended September 30, 2018 and 2017	2
	Condensed Consolidated Statements of Comprehensive Income (Loss) for the Three and Nine Months Ended September 30, 2018 and 2017	3
	Condensed Consolidated Statements of Cash Flows for the Nine Months Ended September 30, 2018 and 2017	4
	Notes to Unaudited Condensed Consolidated Financial Statements	5
ITEM 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	27
ITEM 3.	Quantitative and Qualitative Disclosures About Market Risk	43
ITEM 4.	Controls and Procedures	44
PART II. OTHER INFORMATION
ITEM 1.	Legal Proceedings	45
ITEM 1A.	Risk Factors	45
ITEM 2.	Unregistered Sales of Equity Securities and Use of Proceeds	45
ITEM 3.	Defaults Upon Senior Securities	46
ITEM 4.	Mine Safety Disclosures	46
ITEM 5.	Other Information	46
ITEM 6.	Exhibits	47
SIGNATURES		48

SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS

This Quarterly Report on Form 10-Q contains forward-looking statements within the meaning of the federal securities law. All statements other than statements of historical facts contained in this Quarterly Report on Form 10-Q, including statements regarding our future results of operations and financial position, business strategy and plans and objectives of management for future operations, are forward-looking statements. In many cases, you can identify forward-looking statements by terms such as “may,” “should,” “expects,” “plans,” “anticipates,” “could,” “intends,” “target,” “projects,” “contemplates,” “believes,” “estimates,” “predicts,” “potential” or “continue” or the negative of these terms or other similar words. Forward-looking statements contained in this Quarterly Report on Form 10-Q include, but are not limited to, statements about:

• growth of the wind energy market and our addressable market;

• the potential impact of the increasing prevalence of auction-based tenders in the wind energy market and increased competition from solar energy on our gross margins and overall financial performance;  

• our future financial performance, including our net sales, cost of goods sold, gross profit or gross margin, operating expenses, ability to generate positive cash flow, and ability to achieve or maintain profitability;

• changes in domestic or international government or regulatory policy, including without limitation, changes in trade policy.  

• the sufficiency of our cash and cash equivalents to meet our liquidity needs;

• our ability to attract and retain customers for our products, and to optimize product pricing;

• our ability to effectively manage our growth strategy and future expenses, including our startup and transition costs;

• competition from other wind blade and wind blade turbine manufacturers;

• the discovery of defects in our products;

• our ability to successfully expand in our existing wind energy markets and into new international wind energy markets;

• our ability to successfully expand our transportation business and execute upon our strategy of entering new markets outside of wind energy;

• worldwide economic conditions and their impact on customer demand;

• our ability to maintain, protect and enhance our intellectual property;

• our ability to comply with existing, modified or new laws and regulations applying to our business, including the imposition of new taxes, duties or similar assessments on our products;

• the attraction and retention of qualified employees and key personnel; and

• the potential impact of General Electric’s acquisition of LM Wind Power upon our business;

These forward-looking statements are only predictions. These statements relate to future events or our future financial performance and involve known and unknown risks, uncertainties and other important factors that may cause our actual results, levels of activity, performance or achievements to materially differ from any future results, levels of activity, performance or achievements expressed or implied by these forward-looking statements. We have described in the “Risk Factors” section of our Annual Report on Form 10-K filed with the United States Securities and Exchange Commission (SEC) on March 8, 2018 (the Annual Report on Form 10-K) the principal risks and uncertainties that we believe could cause actual results to differ from these forward-looking statements. Because forward-looking statements are inherently subject to risks and uncertainties, some of which cannot be predicted or quantified, you should not rely on these forward-looking statements as guarantees of future events.

The forward-looking statements in this Quarterly Report on Form 10-Q represent our views as of the date of this Quarterly Report. We anticipate that subsequent events and developments will cause our views to change. However, while we may elect to update these forward-looking statements at some point in the future, we undertake no obligation to update any forward-looking statement to reflect events or developments after the date on which the statement is made or to reflect the occurrence of unanticipated events except to the extent required by applicable law. You should, therefore, not rely on these forward-looking statements as representing our views as of any date after the date of this Quarterly Report. Our forward-looking statements do not reflect the potential impact of any future acquisitions, mergers, dispositions, joint ventures, or investments we may make.

PART I—FINANCIAL INFORMATION

ITEM l. CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

TPI COMPOSITES, INC. AND SUBSIDIARIES

Condensed Consolidated Balance Sheets

(In thousands, except par value data)

	September 30,			December 31,
	2018			2017
	(Unaudited)
Assets
Current assets:
Cash and cash equivalents	$	110,838		$	148,113
Restricted cash		2,845			3,849
Accounts receivable		117,066			121,576
Contract assets		122,265			105,619
Prepaid expenses and other current assets		25,036			27,507
Inventories		7,445			4,112
Total current assets		385,495			410,776
Property, plant, and equipment, net		150,931			123,480
Other noncurrent assets		38,270			22,306
Total assets	$	574,696		$	556,562
Liabilities and Stockholders’ Equity
Current liabilities:
Accounts payable and accrued expenses	$	168,039		$	167,175
Accrued warranty		32,704			30,419
Current maturities of long-term debt		39,201			35,506
Contract liabilities		8,335			2,763
Total current liabilities		248,279			235,863
Long-term debt, net of debt issuance costs and current maturities		93,583			85,879
Other noncurrent liabilities		4,284			4,938
Total liabilities		346,146			326,680
Commitments and contingencies (Note 10)
Stockholders’ equity: (Note 4)
Common shares, $0.01 par value, 100,000 shares authorized and 34,629    shares issued and 34,511 shares outstanding at September 30, 2018    and 100,000 shares authorized and 34,049 shares issued and 34,021    shares outstanding at December 31, 2017		346			340
Paid-in capital		310,166			301,543
Accumulated other comprehensive loss		(21,977	)		(558	)
Accumulated deficit		(56,805	)		(70,932	)
Treasury stock, at cost, 118 shares at September 30, 2018 and 28 shares at   December 31, 2017		(3,180	)		(511	)
Total stockholders’ equity		228,550			229,882
Total liabilities and stockholders’ equity	$	574,696		$	556,562

See accompanying notes to unaudited condensed consolidated financial statements.

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TPI COMPOSITES, INC. AND SUBSIDIARIES

Condensed Consolidated Statements of Operations

(In thousands, except per share data)

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2018			2017			2018			2017
	(Unaudited)
Net sales (Note 4)	$	254,976		$	253,498		$	739,567		$	701,695
Cost of sales		216,594			210,840			625,817			592,495
Startup and transition costs		21,415			12,352			53,474			29,051
Total cost of goods sold		238,009			223,192			679,291			621,546
Gross profit		16,967			30,306			60,276			80,149
General and administrative expenses		9,756			9,315			31,908			28,373
Income from operations		7,211			20,991			28,368			51,776
Other income (expense):
Interest income		45			48			129			78
Interest expense		(2,323	)		(3,254	)		(8,376	)		(9,215	)
Loss on extinguishment of debt		—			—			(3,397	)		—
Realized gain (loss) on foreign currency remeasurement		(8,181	)		39			(12,957	)		(2,575	)
Miscellaneous income		2,511			390			4,003			968
Total other expense		(7,948	)		(2,777	)		(20,598	)		(10,744	)
Income (loss) before income taxes		(737	)		18,214			7,770			41,032
Income tax benefit (provision)		10,269			3,523			6,357			(4,505	)
Net income	$	9,532		$	21,737		$	14,127		$	36,527
Weighted-average common shares outstanding:
Basic		34,419			33,891			34,212			33,789
Diluted		36,282			35,015			35,946			34,748
Net income per common share:
Basic	$	0.28		$	0.64		$	0.41		$	1.08
Diluted	$	0.26		$	0.62		$	0.39		$	1.05

See accompanying notes to unaudited condensed consolidated financial statements.

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TPI COMPOSITES, INC. AND SUBSIDIARIES

Condensed Consolidated Statements of Comprehensive Income (Loss)

(In thousands)

	Three Months Ended					Nine Months Ended
	September 30,					September 30,
	2018			2017		2018			2017
	(Unaudited)
Net income	$	9,532		$	21,737	$	14,127		$	36,527
Other comprehensive income (loss):
Foreign currency translation adjustments		(15,621	)		1,231		(21,908	)		2,808
Unrealized gain on hedging derivatives, net of taxes of $149    for the three and nine months ended September 30, 2018		297			—		489			—
Comprehensive income (loss)	$	(5,792	)	$	22,968	$	(7,292	)	$	39,335

See accompanying notes to unaudited condensed consolidated financial statements.

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TPI COMPOSITES, INC. AND SUBSIDIARIES

Condensed Consolidated Statements of Cash Flows

(In thousands)

	Nine Months Ended
	September 30,
	2018			2017
	(Unaudited)
Cash flows from operating activities:
Net income	$	14,127		$	36,527
Adjustments to reconcile net income to net cash provided by    operating activities:
Depreciation and amortization		19,080			14,143
Share-based compensation expense		6,971			4,794
Loss on extinguishment of debt		3,397			—
Amortization of debt issuance costs		284			430
Deferred income taxes		(10,898	)		(2,613	)
Changes in assets and liabilities:
Accounts receivable		2,052			(66,438	)
Contract assets and liabilities		(13,466	)		7,604
Inventories		(3,489	)		(335	)
Prepaid expenses and other current assets		1,941			881
Other noncurrent assets		(4,503	)		(7,615	)
Accounts payable and accrued expenses		1,958			48,083
Accrued warranty		2,285			8,135
Other noncurrent liabilities		(2,544	)		(136	)
Net cash provided by operating activities		17,195			43,460
Cash flows from investing activities:
Purchase of property and equipment		(50,636	)		(35,312	)
Net cash used in investing activities		(50,636	)		(35,312	)
Cash flows from financing activities:
Proceeds from revolving loans		89,435			—
Repayments of term and revolving loans		(74,972	)		(2,812	)
Net proceeds from (repayments of) accounts receivable financing		(3,915	)		8,196
Proceeds from working capital loans		—			6,620
Repayments of working capital loans		—			(11,258	)
Net proceeds from (repayments of) other debt		(14,174	)		4,556
Debt issuance costs		(281	)		—
Proceeds from exercise of stock options		2,211			988
Repurchase of common stock including shares withheld in lieu of income taxes		(2,859	)		(1,264	)
Net cash provided by (used in) financing activities		(4,555	)		5,026
Impact of foreign exchange rates on cash, cash equivalents and restricted cash		(283	)		305
Net change in cash, cash equivalents and restricted cash		(38,279	)		13,479
Cash, cash equivalents and restricted cash, beginning of year		152,437			129,863
Cash, cash equivalents and restricted cash, end of period	$	114,158		$	143,342
Supplemental disclosures of cash flow information:
Cash paid for interest	$	8,546		$	8,717
Cash paid for income taxes, net		4,279			14,134
Supplemental disclosures of noncash investing and financing activities:
Accrued capital expenditures in accounts payable		4,340			3,689
Equipment acquired through capital lease and financing obligations		11,930			4,749

See accompanying notes to unaudited condensed consolidated financial statements.

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TPI COMPOSITES, INC. AND SUBSIDIARIES

Notes to Unaudited Condensed Consolidated Financial Statements

Note 1. Summary of Operations and Significant Accounting Policies

Description of Business

TPI Composites, Inc. is the holding company that conducts substantially all of its business operations through its direct and indirect subsidiaries (collectively, the Company). The Company was founded in 1968 and has been producing composite wind blades since 2001. The Company’s knowledge and experience of composite materials and manufacturing originates with its predecessor company, Tillotson Pearson Inc., a leading manufacturer of high-performance sail and powerboats along with a wide range of composite structures used in other industrial applications. Following the separation from the boat building business in 2004, the Company reorganized in Delaware as LCSI Holding, Inc. and then changed its corporate name to TPI Composites, Inc. in 2008. The Company is currently headquartered in Scottsdale, Arizona and has expanded its global footprint to include domestic facilities in Newton, Iowa; Fall River, Massachusetts; Warren, Rhode Island and Santa Teresa, New Mexico and international facilities in Dafeng, China; Taicang Port, China; Taicang City, China; Yangzhou, China; Juárez, Mexico; Matamoros, Mexico; Izmir, Turkey and Kolding, Denmark.

References to TPI Composites, Inc, the “Company,” “we,” “us” or “our” in these notes refer to TPI Composites, Inc. and its consolidated subsidiaries.

Public Offerings and Stock Split

In July 2016, we completed an initial public offering (IPO) of 7,187,500 shares of our common stock at a price of $11.00 per share, which included 937,500 shares issued pursuant to the underwriters’ over-allotment option. Certain of our existing shareholders, a non-employee director and executive officers purchased an aggregate of 1,250,000 shares of our common stock in the IPO included in the total issuance above. The net proceeds from the IPO were $67.2 million after deducting underwriting discounts and offering expenses. Immediately prior to the closing of the IPO, all shares of the then-outstanding redeemable preferred shares converted into an aggregate of 21,110,204 shares of our common stock and the redeemable preferred share warrants converted on a net issuance basis into 120,923 shares of our common stock. In addition, concurrent with the closing of the IPO, certain subordinated convertible promissory notes in the aggregate principal and interest amount of $11.9 million were converted into 1,079,749 shares of our common stock at the public offering price of $11.00 per share.

Prior to the IPO, in July 2016 we amended our amended and restated certificate of incorporation to effect a 360-for-1 forward stock split of our common stock. As a result of the stock split, we have adjusted the share amounts authorized and issuable under the share-based compensation plans. All share and per share common stock information (including the share-based compensation plans) referenced throughout the unaudited condensed consolidated financial statements and notes thereto have been retroactively adjusted to reflect this stock split. The stock split did not cause an adjustment to the par value of the authorized shares of our common stock.

In May 2017, we completed a secondary public offering of 5,075,000 shares of our common stock at a price of $16.35 per share, which included 575,000 shares issued pursuant to the underwriters’ option to purchase additional shares. All of the shares were sold by existing shareholders and certain of our executive officers. The selling shareholders received all of the net proceeds of $78.8 million from the secondary public offering. We did not sell any shares and did not receive any of the proceeds from the offering and the costs paid by us in connection with the offering of $0.8 million were recorded in general and administrative costs in the accompanying condensed consolidated statement of operations.  

5

TPI COMPOSITES, INC. AND SUBSIDIARIES

Notes to Unaudited Condensed Consolidated Financial Statements

Basis of Presentation

We divide our business operations into four geographic operating segments—the United States (U.S.), Asia, Mexico and Europe, the Middle East and Africa (EMEA) as follows:

• Our U.S. segment includes (1) the manufacturing of wind blades at our Newton, Iowa plant, (2) the manufacturing of precision molding and assembly systems used for the manufacture of wind blades at our Warren, Rhode Island facility, (3) the manufacturing of composite solutions for the transportation industry, which we also conduct at our existing Rhode Island facility as well as at our Fall River, Massachusetts facility and at a second manufacturing facility in Newton, Iowa which commenced operations in the second quarter of 2018, (4) wind blade inspection and repair services in North America, (5) our advanced engineering center in Kolding, Denmark, which provides technical and engineering resources to our manufacturing facilities and (6) our corporate headquarters, the costs of which are included in general and administrative expenses.

• Our Asia segment includes (1) the manufacturing of wind blades at our facility in Taicang Port, China and at our two facilities in Dafeng, China, (2) the manufacturing of precision molding and assembly systems at our Taicang City, China facility and (3) wind blade inspection and repair services.  In March 2018, we entered into a new lease agreement with a third party related to the lease of a new manufacturing facility in the Yangzhou Economic & Technical Development Zone in Yangzhou, China and we expect to commence operations at this facility in early 2019.

• Our Mexico segment manufactures wind blades from our three facilities in Juárez, Mexico, the most recent of which commenced operations in January 2017.  In April 2017, we entered into a new lease agreement with a third party for a new manufacturing facility in Matamoros, Mexico and we commenced operations at this facility in the third quarter of 2018. This segment also manufactures precision molding and assembly systems and performs wind blade inspection and repair services.

• Our EMEA segment manufactures wind blades from our two facilities in Izmir, Turkey and also performs wind blade inspection and repair services.

The accompanying condensed consolidated financial statements include the accounts of TPI Composites, Inc. and of our majority owned subsidiaries. All significant intercompany transactions and balances have been eliminated.

The condensed consolidated financial statements included herein have been prepared by us without audit, pursuant to the rules and regulations of the SEC and should be read in conjunction with the audited consolidated financial statements for the year ended December 31, 2017 included in our Annual Report on Form 10-K. Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States (GAAP) have been condensed or omitted, as permitted by the SEC, although we believe the disclosures that are made are adequate to make the information presented herein not misleading. The accompanying condensed consolidated financial statements reflect, in the opinion of our management, all normal recurring adjustments necessary to present fairly our financial position at September 30, 2018, and the results of our operations, comprehensive income and cash flows for the periods presented. We restated our December 31, 2017 condensed consolidated balance sheet and the September 30, 2017 condensed consolidated statement of operations and cash flow for the effect of the adoption of Accounting Standards Update (ASU) 2014-09, Revenue from Contracts with Customers, (Topic 606), see Note 13, Adjustments to Previously Reported Financial Statements from the Adoption of an Accounting Pronouncement. Interim results for the three and nine months ended September 30, 2018 and 2017 are not necessarily indicative of the results to be expected for the full years.

As previously announced, effective January 1, 2018, we adopted the requirements of Topic 606 using the full retrospective method as further described in Recently Issued Accounting Pronouncements - Revenue from Contracts with Customers and Note 2, Revenue from Contracts with Customers. All amounts and disclosures set forth in this Quarterly Report on Form 10-Q reflect the adoption of Topic 606 and differ from amounts previously reported for prior periods. See Note 13, Adjustments to Previously Reported Financial Statements from the Adoption of an Accounting Pronouncement, for further discussion of the adoption of Topic 606, including the impact on our previously reported financial statements.

Revenue Recognition

The majority of our revenue is generated from long-term contracts associated with manufacturing of wind blades and related services.  We account for a long-term contract when it has the approval from both parties, the rights of the parties are identified, payment terms are established, the contract has commercial substance and the collectability of consideration is probable.

6

TPI COMPOSITES, INC. AND SUBSIDIARIES

Notes to Unaudited Condensed Consolidated Financial Statements

To determine the proper revenue recognition method for each long-term contract, we evaluate whether the original contract should be accounted for as one or more performance obligations. This evaluation requires judgment and the decisions reached could change the amount of revenue and gross profit recorded in a given period. As most of our contracts contain multiple performance obligations, we allocate the total transaction price to each performance obligation based on the estimated relative standalone selling prices of the promised goods or services underlying each performance obligation. Our manufacturing services are customer specific and involve production of items that cannot be sold to other customers due to the customers’ protected intellectual property; therefore, we allocate the total transaction price under our contracts with multiple performance obligations using the contractually stated prices, as these prices represent the relative standalone selling price based on an expected cost plus margin model.  

Revenue is primarily recognized over time as we have an enforceable right to payment upon termination and we may not use or sell the product to fulfill other customers’ contracts.  In addition, the customer does not have return or refund rights for items produced that conform to the specifications included in the contract. Because control transfers over time, revenue is recognized based on the extent of progress towards the completion of the performance obligation. We use the cost-to-cost input measure of progress for our contracts as this method provides the best representation of the production progress towards satisfaction of the performance obligation as the materials are distinct to the product being manufactured because of customer specifications provided for in the contract, the costs incurred are proportional to the progress towards completion of the product, and the products do not involve significant pre-fabricated component parts. Under the cost-to-cost method, progress and the related revenue recognition is determined by a ratio of direct costs incurred to date in fulfillment of the contract to the total estimated direct costs required to complete the performance obligation.

Determining the revenue to be recognized for services performed under our manufacturing contracts involves significant judgments and estimates relating to the total consideration to be received and the expected total costs to complete the performance obligation.  The judgments and estimates relating to the total consideration to be received include the amount of variable consideration as our contracts typically provide the customer with a range of production output options from guaranteed minimum volume obligations to the production capacity of the facility, and customers will provide periodic non-cancellable commitments for the number of wind blades to be produced over the term of the agreement.  We use historical experience, customer commitments and forecasted future production based on the capacity of the plant to estimate the total revenue to be received to complete the performance obligation.  In addition, the amount of revenue per unit produced may vary based on the costs of production of the wind blades as we may be able to change the price per unit based on changes in the cost of production.  Further, some of our contracts provide opportunities for us to share in labor and material cost savings as well as absorb some additional costs as an incentive for more efficient production, both of which impact the margin realized on the contract and ultimately the total amount of revenue to be recognized.  Additionally, certain of our customer contracts provide for concessions by us for missed production deadlines.  

We estimate variable consideration at the most likely amount to which we expect to be entitled. We include estimated amounts in the 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. Our estimates of variable consideration and determination of whether to include estimated amounts in the transaction price are based largely on an assessment of our anticipated performance and all information available to us at the time of the estimate and may materially change as additional information becomes known.

Our contracts may be modified to account for changes in specifications of products and changing requirements. If the contract modifications are for goods or services that are not distinct from the existing contract, they are accounted for as if they were part of the original contract. The effect of a contract modification on the transaction price and the measure of progress for the performance obligation to which it relates is recognized as an adjustment to revenue on a cumulative catch-up basis. If contract modifications are for goods and services that are distinct from the existing contract and increases the amount of consideration reflecting the standalone sale price of the additional goods or services, then the contract modification is accounted for as a separate contract and is evaluated for one or more performance obligations.  

Each reporting period, we evaluate the progress towards satisfaction of each performance obligation based on any contract modifications that have occurred, cost incurred to date, and an estimate of the expected future revenue and costs to be incurred to complete the performance obligation. Based on this analysis, any changes in estimates of revenue, cost of sales, contract assets and liabilities and the related impact to operating income are recognized on a cumulative catch-up basis, which recognizes in the current period the cumulative effect of the changes on current and prior periods based on the percentage of completion of the performance obligation.

Wind blade pricing is based on annual commitments of volume as established in our customer’s contract and orders less than committed volume may result in a higher price per wind blade to our customers. Orders in excess of annual commitments may result

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TPI COMPOSITES, INC. AND SUBSIDIARIES

Notes to Unaudited Condensed Consolidated Financial Statements

in discounts to our customers from the contracted price for the committed volume. Our customers typically provide periodic purchase orders with the price per wind blade given the current cost of the bill of materials, labor requirements and volume desired.  We record an allowance for expected utilization of early payment discounts which are reported as a reduction of the related revenue.

Precision molding and assembly systems included in a customer’s contract are based upon the specific engineering requirements and design determined by the customer and are specific to the wind blade design and function desired. From the customer’s engineering specifications, a job cost estimate is developed along with a production plan, and the desired margin is applied based on the location the work is to be performed and complexity of the customer’s design. Precision molding and assembly systems are generally built to produce wind blades which may be manufactured by us in production runs specified in the customer contract.

Contract assets primarily relate to our rights to consideration for work completed but not billed at the reporting date on manufacturing services contracts.  The contract assets are transferred to accounts receivable when the rights become unconditional, which generally occurs when customers are invoiced upon the determination that a product conforms to the contract specifications and invoices are due based on each customers negotiated payment terms, which range from 15 to 65 days.  We apply the practical expedient that allows us to exclude payment terms under one year from the transfer of a promised good or service from consideration of a significant financing component in its contracts. With regards to the production of precision molding and assembly systems, our contracts generally call for progress payments to be made in advance of production. Generally, payment is made at certain percentage of completion milestones with the final payment due upon delivery to the manufacturing facility. These progress payments are recorded within contract liabilities as current liabilities in the condensed consolidated balance sheets and are reduced as we record revenue over time.  

Our customers may request, in situations where they do not have space available to receive products or do not want to take possession of products immediately for other reasons, that their finished products be stored by us in one of our facilities. Most of our contracts provide for a limited number of wind blades to be stored during the period of the contract with any additional wind blades stored subject to additional storage fees, which are included in the wind blade performance obligation revenue.  

Revenue related to non-recurring engineering and freight services provided under our customer contracts is recognized at a point in time following the transfer of control of the promised services to the customer. Customers usually pay the carrier directly for the cost of shipping associated with items produced.  When we pay the shipping costs, we apply the practical expedient that allows us to account for shipping and handling as a fulfillment costs and include the revenue in the associated performance obligation and the costs are included in cost of goods sold.

Taxes assessed by a governmental authority that are both imposed on and concurrent with specific revenue-producing transactions, that are collected by us from a customer, are excluded from revenue.

Warranty Expense

We provide a limited warranty for our mold and wind blade products, including parts and labor, with terms and conditions that vary depending on the product sold, generally for periods that range from two to five years. Warranty expense is recorded based upon estimates of future repairs using a probability-based methodology that considers previous warranty claims, identified quality issues and industry practices. Once the warranty period has expired, any remaining unused warranty accrual for the specific products is reversed against the current year warranty expense amount.

Warranty accrual at September 30 consisted of the following:

	2018
	(in thousands)
Warranty accrual at beginning of year	$	30,419
Accrual during the period		8,200
Cost of warranty services provided during the period		(3,153	)
Reversal of reserves upon warranty expiration		(2,762	)
Warranty accrual at end of period	$	32,704

Treasury Stock

Common stock purchased for treasury is recorded at historical cost. Transactions in treasury shares relate to share-based compensation plans and are recorded at weighted-average cost.

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TPI COMPOSITES, INC. AND SUBSIDIARIES

Notes to Unaudited Condensed Consolidated Financial Statements

Net IncomePer Common Share Calculation

The basic net income per common share is computed by dividing the net income by the weighted-average number of common shares outstanding during a period. Diluted net income per common share is computed by dividing the net income by the weighted-average number of common shares outstanding plus potentially dilutive securities using the treasury stock method. The table below reflects the calculation of the weighted-average number of common shares outstanding, using the treasury stock method, used in computing basic and diluted earnings per common share:

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2018		2017		2018		2017
	(in thousands)
Basic weighted-average shares outstanding		34,419		33,891		34,212		33,789
Effect of dilutive awards		1,863		1,124		1,734		959
Diluted weighted-average shares outstanding		36,282		35,015		35,946		34,748

Share-based compensation awards of 7,000 shares and 63,000 shares were excluded from the computation of diluted net income per share for the three and nine months ended September 30, 2018, respectively, because their effect would be anti-dilutive. We did not have any potential dilutive securities which were excluded from the computation of diluted net income per share for the three and nine months ended September 30, 2017.

Financial Instruments

Interest Rate Swap

We use interest rate swap contracts to mitigate our exposure to interest rate fluctuations associated with our new credit agreement (the Credit Agreement) that we entered into in April 2018. We do not use such swap contracts for speculative or trading purposes.

To offset the variability of future interest payments on the Credit Agreement arising from changes in the London Interbank Offered Rate (LIBOR), in April 2018, we entered into an interest rate swap agreement with a financial institution for a notional amount of $75.0 million with an expiration date of April 2023. This interest rate swap effectively hedges $75.0 million of the $75.4 million of the then outstanding future variable rate LIBOR interest expense to a fixed rate interest expense. The derivative instrument qualified for accounting as a cash flow hedge in accordance with Financial Accounting Standards Board (FASB) Accounting Standard Codification (ASC) Topic 815, Derivatives and Hedging, and we designated it as such.

The settlement value of the interest rate swap is $0.7 million as of September 30, 2018 and is included in other noncurrent assets in the condensed consolidated balance sheet.  The unrealized gain on the swap of $0.6 million, net of tax, is included in the condensed consolidated statement of other comprehensive income (loss).

Forward Contract

We use forward contracts to mitigate our exposure associated with fluctuations in foreign currency exchange rates. We do not use such forward contracts for speculative or trading purposes.

In August 2018, we provided a Turkish Lira denominated intercompany loan to an EMEA subsidiary in the amount of $15.0 million converted at the spot rate on the transaction date to 96.6 million Turkish Lira to fund their working capital requirements. We entered into a forward contract, with the same expiration as that of the intercompany loan’s maturity in October 2018, for a notional amount of 101.5 million Turkish Lira to reduce our exposure to currency fluctuations from the settlement of this Turkish Lira denominated intercompany loan of 96.6 million Turkish Lira and accrued interest of 4.9 million Turkish Lira. The derivative instrument qualifies for accounting as a cash flow hedge in accordance with FASB ASC Topic 815, Derivatives and Hedging, and we designated it as such at inception.

The settlement liability of the forward contract is $1.2 million as of September 30, 2018 and is included in accounts payable and accrued expenses in the condensed consolidated balance sheet. 

For the three and nine months ended September 30, 2018, a loss of $1.1 million has been included in realized loss on foreign currency remeasurement in the condensed consolidated statements of operations offsetting the remeasurement of the Turkish Lira denominated

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TPI COMPOSITES, INC. AND SUBSIDIARIES

Notes to Unaudited Condensed Consolidated Financial Statements

intercompany loan receivable. An additional $0.1 million unrealized loss on the forward contract, net of tax,is included in the condensed consolidated statement of other comprehensive income (loss).

Use of Estimates

The preparation of these condensed consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the condensed consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.

Recently Issued Accounting Pronouncements

Accounting Pronouncements Adopted in 2018

Revenue from Contracts with Customers

In May 2014, the FASB issued Topic 606, which provides new recognition and disclosure requirements for revenue from contracts with customers that supersedes the existing revenue recognition guidance. The new recognition requirements focus on when the customer obtains control of the goods or services, rather than the current risks and rewards model of recognition. The core principle of the new standard is that an entity will recognize revenue when it transfers goods or services to its customers in an amount that reflects the consideration an entity expects to be entitled to for those goods or services. The new disclosure requirements included in these financial statements contain information intended to communicate the nature, amount, timing and any uncertainty of revenue and cash flows from the applicable contracts, including any significant judgments and changes in judgments and assets recognized from the costs to obtain or fulfill a contract.

We adopted Topic 606 as of January 1, 2018 with retrospective application to January 1, 2016 through December 31, 2017.  See Note 2, Revenue from Contracts with Customers and Note 13, Adjustments to Previously Reported Financial Statements from the Adoption of an Accounting Pronouncement, for further discussion of the adoption of this standard, including the impact on our previously reported financial statements.

Cash Flow Presentation

In August 2016, the FASB issued ASU 2016-15, Classification of Certain Cash Receipts and Cash Payments, that clarifies how certain cash receipts and cash payments are presented and classified in the condensed consolidated statements of cash flows.  In addition, in November 2016, the FASB issued ASU 2016-18, Restricted Cash, that requires restricted cash and cash equivalents to be included with the amount of cash and cash equivalents that are reconciled on the condensed consolidated statements of cash flows. We adopted these ASUs as of January 1, 2018 with retrospective application to each period presented.

The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the condensed consolidated balance sheets which total the same such amounts in the condensed consolidated statements of cash flows:

	September 30,		December 31,		September 30,		December 31,
	2018		2017		2017		2016
	(in thousands)
Cash and cash equivalents	$	110,838	$	148,113	$	139,065	$	119,066
Restricted cash		2,845		3,849		3,802		2,259
Restricted cash included within other noncurrent assets		475		475		475		8,538
Total cash, cash equivalents and restricted cash shown in the condensed consolidated statements of cash flows	$	114,158	$	152,437	$	143,342	$	129,863

See Note 13, Adjustments to Previously Reported Financial Statements from the Adoption of an Accounting Pronouncement, for further discussion of the adoption of these standards, including the impact on our previously reported financial statements.  

Income Taxes

In December 2017, the SEC staff issued Staff Accounting Bulletin 118 (SAB 118), which provides relief for companies that have not completed their accounting for the effects of The Tax Cuts and Jobs Act (Tax Reform Act) but can determine a reasonable estimate of

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TPI COMPOSITES, INC. AND SUBSIDIARIES

Notes to Unaudited Condensed Consolidated Financial Statements

those effects to allow them to include a provisional amount based on their reasonable estimate in their financial statements. The guidance in SAB 118 also allows companies to adjust the provisional amounts during a one-year “measurement period” which is similar to the measurement period used when accounting for business combinations. In the accompanying consolidated financial statements, we have not yetcompleted our accounting for all the tax effects associated with the enactment of the Tax Reform Act. However, we have, in certain cases made a reasonable estimate of the effects on our existing carryforward attributes and the one-time transition tax. See Note 9, Income Taxes, for further discussion.

Accounting Pronouncements Not Yet Adopted

Leases

In February 2016, the FASB issued ASU 2016-02, Leases. ASU 2016-02 is a comprehensive new recognition model for leases requiring a lessee to recognize the asset and liability that arise from leases. For public companies, this new standard is effective for financial statements issued for annual periods beginning after December 16, 2018. Entities may elect to early adopt the lease standard in 2016. In adopting ASU 2016-02, entities are required to recognize and measure leases at the beginning of the earliest period presented using a modified retrospective approach. The modified retrospective approach includes a number of optional practical expedients that entities may elect to apply. In July 2018, the FASB issued ASU 2018-11, Leases: Targeted Improvements, that provides an alternative transition method of adoption, permitting the recognition of a cumulative-effect adjustment to retained earnings on the date of adoption.

We will adopt this new standard on the effective date using the alternative transition method provided by ASU 2018-11 and we are currently evaluating the potential changes from ASU 2018-11 to our future financial reporting and disclosures and designing and implementing related processes and controls.  We expect that the standard will have a material impact on our total assets and liabilities for the addition of right-of-use assets and lease liabilities, but we do not expect it to have a material impact on our results of operations or liquidity.  

Note 2. Revenue From Contracts with Customers

The following tables represents the disaggregation of our net sales revenue by contract type for each of our reportable segments (in thousands):

	Three Months Ended September 30, 2018
	U.S.		Asia		Mexico		EMEA		Total
Wind blade sales	$	28,082	$	61,139	$	78,892	$	66,795	$	234,908
Precision molding and    assembly systems sales		775		7,608		89		—		8,472
Transportation sales		6,769		—		—		—		6,769
Other sales		1,063		1,480		584		1,700		4,827
Total net sales	$	36,689	$	70,227	$	79,565	$	68,495	$	254,976

	Nine Months Ended September 30, 2018
	U.S.		Asia		Mexico		EMEA		Total
Wind blade sales	$	100,723	$	196,490	$	190,530	$	187,698	$	675,441
Precision molding and    assembly systems sales		4,997		25,516		1,067		—		31,580
Transportation sales		18,281		—		—		—		18,281
Other sales		3,507		3,822		2,285		4,651		14,265
Total net sales	$	127,508	$	225,828	$	193,882	$	192,349	$	739,567

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TPI COMPOSITES, INC. AND SUBSIDIARIES

Notes to Unaudited Condensed Consolidated Financial Statements

	Three Months Ended September 30, 2017
	U.S.		Asia		Mexico		EMEA		Total
Wind blade sales	$	41,293	$	96,654	$	59,634	$	40,479	$	238,060
Precision molding and    assembly systems sales		500		4,161		823		—		5,484
Transportation sales		3,376		—		—		—		3,376
Other sales		2,556		2,138		237		1,647		6,578
Total net sales	$	47,725	$	102,953	$	60,694	$	42,126	$	253,498

	Nine Months Ended September 30, 2017
	U.S.		Asia		Mexico		EMEA		Total
Wind blade sales	$	125,831	$	245,633	$	153,302	$	134,752	$	659,518
Precision molding and    assembly systems sales		5,444		11,225		1,612		—		18,281
Transportation sales		9,084		—		—		—		9,084
Other sales		2,948		4,875		3,196		3,793		14,812
Total net sales	$	143,307	$	261,733	$	158,110	$	138,545	$	701,695

In addition, most of our net sales are made directly to our customers, primarily wind turbine manufacturers, under our long-term contracts which are typically five years in length.

Contract Assets and Liabilities

Contract assets consist of unbilled amounts typically resulting from revenue recognized over time for products in production and the revenue recognized exceeds the amount billed to the customer. The contract assets are recorded as current assets in the condensed consolidated balance sheets. Contract liabilities consist of advance payments in excess of costs incurred. These amounts were historically recorded as customer deposits which primarily related to progress payments received as precision molding and assembly systems were being manufactured. The contract liabilities are recorded as current liabilities in the condensed consolidated balance sheets and are reduced as we record revenue over time.  

These contract assets and liabilities are reported on the condensed consolidated balance sheets net on a contract-by-contract basis at the end of each reporting period, as demonstrated in the table below.

Contract assets and contract liabilities consisted of the following:

	September 30,			December 31,
	2018			2017			$ Change
	(in thousands)
Gross contract assets	$	137,083		$	112,557		$	24,526
Less: reclassification from contract liabilities		(14,818	)		(6,938	)		(7,880	)
Contract assets	$	122,265		$	105,619		$	16,646

	September 30,			December 31,
	2018			2017			$ Change
	(in thousands)
Gross contract liabilities	$	23,153		$	9,701		$	13,452
Less: reclassification to contract assets		(14,818	)		(6,938	)		(7,880	)
Contract liabilities	$	8,335		$	2,763		$	5,572

Contracts assets increased by $16.6 million from December 31, 2017 to September 30, 2018 due to incremental unbilled production during the nine months ended September 30, 2018. Contracts liabilities increased by $5.6 million from December 31, 2017 to September 30, 2018 due to the amounts billed to customers exceeding the progress billings received primarily related to precision molding and assembly systems being produced in the nine months ended September 30, 2018.

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TPI COMPOSITES, INC. AND SUBSIDIARIES

Notes to Unaudited Condensed Consolidated Financial Statements

The time it takes to produce a single blade is typically between 24 to 36 hours. The time it takes to produce a mold is typically between 3 to 6 months.

For the three months ended September 30, 2018, we recognized no revenue, and for the nine months ended September 30, 2018, we recognized $2.8 million of revenue, in each case, that was included in the corresponding contract liability balance at the beginning of the period.

Performance Obligations

Remaining performance obligations represent the transaction price of firm orders for which work has not been performed and excludes any unexercised contract options.

For the three and nine months ended September 30, 2018, net revenue recognized from our performance obligations satisfied in previous periods decreased by $3.9 million and $7.9 million, respectively. This primarily relates to changes in certain of our estimated total contract values and related percentage of completion estimates.

As of September 30, 2018, the aggregate amount of the transaction price allocated to the remaining performance obligations was  approximately $5.6 billion. We estimate that we will recognize the remaining performance obligations as revenue as follows: 5 percent in the remainder of 2018, 27 percent in 2019, 27 percent in 2020, 17 percent in 2021, 14 percent in 2022 and the remaining 10 percent in 2023.

Pre-Production Investments

We recognize an asset from the costs incurred to fulfill a contract when those costs meet all of the following criteria:  (a) the costs relate directly to a contract or to an anticipated contract that we can specifically identify; (b) the costs generate or enhance our resources that will be used in satisfying performance obligations in the future; and, (c) the costs are expected to be recovered. We capitalize the costs related to training our workforce to execute the manufacturing services and other facility set-up costs related to preparing for production.  We factor these costs into our estimated cost analysis for the overall contract.  Costs capitalized are amortized over the number of units produced during the contract term. As of September 30, 2018, the cost and accumulated amortization of such assets totaled $4.8 million and $1.7 million, respectively. As of December 31, 2017, the cost and accumulated amortization of such assets totaled $2.4 million and $1.4 million, respectively. These amounts are included in other noncurrent assets in the condensed consolidated balance sheet.

In applying the practical expedient as permitted under Topic 606, we recognize the incremental costs of obtaining contracts as an expense when incurred if the amortization period of the asset that we otherwise would have recognized is one year or less.  These costs are included in cost of goods sold.

Note 3. Significant Risks and Uncertainties

Our revenues and receivables are from a small number of customers. As such, our production levels are dependent on these customers’ orders. See Note 11, Concentration of Customers.

We maintain our U.S. cash in bank deposit accounts that, at times, exceed U.S. federally insured limits. U.S. bank accounts are guaranteed by the Federal Deposit Insurance Corporation (FDIC) in an amount up to $250,000 during 2018 and 2017. At September 30, 2018 and December 31, 2017, we had $70.6 million and $98.9 million, respectively, of cash in deposit accounts in U.S. banks, which was in excess of FDIC limits. We have not experienced losses in any such accounts.

We also maintain cash in bank deposit accounts outside the U.S. with no insurance. At September 30, 2018, this includes $29.6 million in China, $8.6 million in Turkey and $2.0 million in Mexico. We have not experienced losses in these accounts. In addition, at September 30, 2018, we have short-term deposits in interest bearing accounts of $2.8 million in China, which are reported as restricted cash in our condensed consolidated balance sheets. At September 30, 2018, we also have long-term deposits in interest bearing accounts of $0.5 million in Iowa which are reported as restricted cash within the caption other noncurrent assets in our condensed consolidated balance sheets.

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TPI COMPOSITES, INC. AND SUBSIDIARIES

Notes to Unaudited Condensed Consolidated Financial Statements

Note 4. Related-Party Transactions

Related party transactions include transactions between us and certain of our affiliates. The following transactions were in the normal course of operations and were measured at the exchange amount, which is the amount of consideration established and agreed to by the parties.

We have entered into several agreements with subsidiaries of General Electric Company and its consolidated affiliates (GE) relating to the operation of its business. As a result of these agreements, GE has been a debtor, creditor and holder of both preferred and common shares. During the second quarter of 2017, GE reduced its holdings of our common shares to less than five percent of the total shares then outstanding and completely divested of our common shares during the third quarter of 2017.

We have entered into five separate supply agreements with GE to manufacture wind blades in Newton, Iowa; Taicang Port, China; Juárez, Mexico (2) and Izmir, Turkey. The supply agreements in Taicang Port, China and Izmir, Turkey expired on December 31, 2017 and GE did not renew or extend these two contracts. For the six months ended June 30, 2017, we recorded related-party sales with GE of $198.6 million.

Certain of our existing stockholders, consisting of entities associated with Element Partners, Angeleno Group and Landmark Partners, each of which is an affiliate of a member of the board of directors, as well as certain executive officers and a director, purchased an aggregate of 1,250,000 shares of our common stock in the IPO. In addition, all outstanding obligations and accrued interest under our subordinated convertible promissory notes held by certain existing stockholders, including Element Partners, Angeleno Group and Landmark Partners, were converted into an aggregate of 1,079,749 shares of our common stock concurrent with the closing of the IPO at the public offering price of $11.00 per share.  

In connection with our secondary offering in May 2017, certain entities associated with Element Partners, Angeleno Group, Landmark Partners and NGP Energy Technology Partners, L.P, as well as certain of our executive officers sold an aggregate of 5,075,000 shares of our common stock at the public offering price of $16.35 per share.

Note 5. Accounts Receivable

Accounts receivable consisted of the following:

	September 30,		December 31,
	2018		2017
	(in thousands)
Trade accounts receivable	$	112,258	$	117,794
Other accounts receivable		4,808		3,782
Total accounts receivable	$	117,066	$	121,576

Note 6. Property, Plant and Equipment, Net

Property, plant and equipment, net consisted of the following:

	September 30,			December 31,
	2018			2017
	(in thousands)
Machinery and equipment	$	113,686		$	100,681
Buildings		15,001			14,711
Leasehold improvements		33,229			21,853
Office equipment and software		21,542			18,664
Furniture		18,703			19,017
Vehicles		287			294
Construction in progress		19,097			10,687
Total		221,545			185,907
Accumulated depreciation		(70,614	)		(62,427	)
Property, plant and equipment, net	$	150,931		$	123,480

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TPI COMPOSITES, INC. AND SUBSIDIARIES

Notes to Unaudited Condensed Consolidated Financial Statements

Total depreciation expense for the three months ended September 30, 2018 and 2017 was $5.8million and $5.1 million, respectively, and $18.6 million and $13.5 millionfor the nine months ended September 30, 2018 and 2017, respectively.

Note 7. Long-Term Debt, Net of Debt Issuance Costs and Current Maturities

Long-term debt, net of debt issuance costs and current maturities, consisted of the following:

	September 30,			December 31,
	2018			2017
	(in thousands)
Senior term loan—U.S.	$	—		$	71,250
Senior revolving loan—U.S.		90,414			2,820
Accounts receivable financing—EMEA		10,185			14,100
Equipment financing—EMEA		13,412			16,901
Equipment capital lease—U.S.		26			536
Equipment capital lease—EMEA		7,404			5,058
Equipment capital lease—Mexico		12,268			12,844
Equipment loan—Mexico		5			47
Total long-term debt		133,714			123,556
Less: Debt issuance costs		(930	)		(2,171	)
Total long-term debt, net of debt issuance costs		132,784			121,385
Less: Current maturities of long-term debt		(39,201	)		(35,506	)
Long-term debt, net of debt issuance costs and current maturities	$	93,583		$	85,879

In April 2018, we entered into a new credit agreement (the Credit Agreement) with four lenders consisting of a multi-currency, revolving credit facility in an aggregate principal amount of $150.0 million, including a $25.0 million letter of credit sub-facility. We drew down $75.4 million on the revolving credit facility in connection with the closing of the transactions contemplated by the Credit Agreement and used the proceeds to pay all outstanding amounts due and payable under our senior secured credit facility, various fees and expenses and related accrued interest. All borrowings and amounts outstanding under the Credit Agreement are scheduled to mature in April 2023.

Interest accrues at a variable rate equal to LIBOR plus an initial margin of 1.5% (3.7% as of September 30, 2018), which may vary based on our total net leverage ratio as defined in the Credit Agreement. Interest is paid monthly and we are not obligated to make any principal repayments prior to the maturity date so long as we are not in default under the Credit Agreement. We may prepay borrowings without penalty under the Credit Agreement.

In April 2018, we also entered into an interest rate swap arrangement to fix a notional amount of $75.0 million under the Credit Agreement at an effective interest rate of 4.2% for a period of five years.

In August 2018, we borrowed an additional $15.0 million under the Credit Agreement in order to fund the working capital requirements of one of our EMEA subsidiaries.

Note 8. Share-Based Compensation Plans

Our Amended and Restated 2015 Stock Option and Incentive Plan (the 2015 Plan) provides for the issuance of incentive stock options, non-qualified stock options, stock appreciation rights, restricted stock units, restricted stock awards, unrestricted stock awards, cash-based awards, performance share awards and dividend equivalent rights to certain employees, non-employee directors and consultants. Under the 2015 Plan, we have granted awards of stock options, restricted stock units (RSUs) and performance-based restricted stock units (PSUs) to certain employees and non-employee directors.

During the nine months ended September 30, 2018, we issued to certain employees and non-employee directors an aggregate of 149,012 timed-based RSUs, 121,836 PSUs that vest upon achievement of a cumulative, three-year Adjusted EBITDA target measured from January 1, 2018 through December 31, 2020, and 170,712 PSUs that vest upon achievement of certain stock price hurdles for the period of the grant date through December 31, 2020. 100% of the time-based RSUs vest on the third anniversary date of the grant date.

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TPI COMPOSITES, INC. AND SUBSIDIARIES

Notes to Unaudited Condensed Consolidated Financial Statements

Each of the time-based and performance-based awards are subject to the recipient’s continued service with us, the terms and conditions of the 2015 Plan and the applicable award agreement.

The share-based compensation expense recognized in the condensed consolidated statements of operations was as follows:

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2018		2017		2018		2017
	(in thousands)
Cost of goods sold	$	313	$	210	$	1,268	$	755
General and administrative expenses		1,659		833		5,703		4,039
Total share-based compensation expense	$	1,972	$	1,043	$	6,971	$	4,794

The share-based compensation expense recognized by award type was as follows:

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2018		2017		2018		2017
	(in thousands)
RSUs	$	1,112	$	382	$	3,595	$	1,546
Stock options		460		661		2,491		3,248
PSUs		400		-		885		-
Total share-based compensation expense	$	1,972	$	1,043	$	6,971	$	4,794

As of September 30, 2018, the unamortized cost of the outstanding RSUs and PSUs was $4.8 million and $3.9 million, respectively, which we expect to recognize in the condensed consolidated financial statements over weighted-average periods of approximately 1.7 years and 2.5 years, respectively. Additionally, the total unrecognized cost related to non-vested stock option awards was $2.3 million, which we expect to recognize in the condensed consolidated financial statements over a weighted-average period of approximately 1.5 years.    

The summary of activity under our incentive plans is as follows:

				Stock Options							RSUs					PSUs
	Shares Available for Grant			Shares			Weighted- Average Exercise Price		Options Exercisable		Units			Weighted- Average Grant Date Fair Value		Units			Weighted- Average Grant Date Fair Value
Balance as of December 31, 2017		4,731,117			3,203,290		$	13.34		890,433		613,380		$	15.02		—		$	—
Increase in shares authorized		1,360,826			—			—				—			—		—			—
Granted		(451,212	)		9,652			22.67				149,012			23.37		292,548			22.67
Exercised/vested		—			(186,959	)		11.83				(298,036	)		13.03		—			—
Forfeited/cancelled		115,067			(105,750	)		13.00				(5,053	)		23.04		(4,264	)		22.67
Balance as of September 30, 2018		5,755,798			2,920,233			13.48		1,393,408		459,303			18.93		288,284			22.67

The fair value of RSUs which vested during the nine months ended September 30, 2018 was $3.9 million.  In addition, during the nine months ended September 30, 2018, we repurchased 100,891 shares for $2.9 million related to tax withholding requirements on vested RSU awards.

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TPI COMPOSITES, INC. AND SUBSIDIARIES

Notes to Unaudited Condensed Consolidated Financial Statements

The following table summarizes the outstanding and exercisable stock option awards as of September 30, 2018:

		Options Outstanding						Options Exercisable
Range of Exercise Prices:		Shares		Weighted- Average Remaining Contractual Life (in years)		Weighted- Average Exercise Price		Shares		Weighted- Average Exercise Price
$8.49			16,397		1.8	$	8.49		16,397	$	8.49
$	10.87		1,756,792		6.7		10.87		884,692		10.87
$11.00 to $16.53			624,251		7.3		16.19		291,229		16.34
$17.68 to $18.70			305,241		7.7		18.67		162,142		18.68
$18.77 to $22.67			217,552		9.0		19.92		38,948		20.14
$8.49 to $22.67			2,920,233		7.1		13.48		1,393,408		13.15

Note 9. Income Taxes

Income taxes for the three and nine months ended September 30, 2018 were lower than for the three and nine months ended September 30, 2017 primarily due to the reversal of our valuation allowances related to our U.S. federal deferred tax assets in the three months ended September 30, 2018 totaling $10.9 million. This valuation allowance release was the result of our decision during the three months ended September 30, 2018 to account for the impact of the global intangible low-taxed income (GILTI) as a current period item. With this election and our adoption of ASC 606, we ceased to be in a cumulative loss position in the U.S. and we have positive evidence that our U.S. tax attributes will be fully realized in the future.

We will continue to refine our provisional estimates of our computations of the GILTI, the deduction for foreign-derived intangible income (FDII) and other parts of the Tax Reform Act, which may result in changes to the expected impact for 2018. We also continue to not record a deferred tax liability related to unremitted foreign earnings as we maintain our assertion to permanently reinvest our unremitted foreign earnings. 

An ownership change under Sections 382 and 383 of the Internal Revenue Code was deemed to occur in June 2018. In general, a Section 382 and 383 ownership change occurs if there is a cumulative change in our ownership by “5% shareholders” (as defined in the Internal Revenue Code of 1986, as amended) that exceeds 50 percentage points over a rolling three-year period. Based on the analysis performed, however, we do not believe that the Section 382 and 383 annual limitation will materially impact our ability to utilize the tax attributes that existed as of the date of the ownership. Additional ownership changes in the future could result in additional limitations on our net operating loss carryforwards and credits.

Income taxes for the three and nine months ended September 30, 2018 have also been adjusted to reflect China’s retroactive increase in the deduction for research and development expenses. No other changes in tax law during the quarter have had a material impact on our income tax provision.

Note 10. Commitments and Contingencies

Legal Proceedings

From time to time, we may be involved in disputes or litigation relating to claims arising out of our operations.

In March 2015, a complaint was filed against us in the Superior Court of the State of Arizona (Maricopa County) by a former employee, alleging that we had agreed to make certain cash payments to such employee upon any future sale of the Company. We filed a motion to dismiss the complaint in April 2015, which was denied. We subsequently filed an answer to the complaint in July 2015 denying the substantive allegations of the complaint. The parties completed court-ordered mediation in December 2015 but were not able to reach a settlement. We filed a motion for summary judgment to dismiss the complaint in April 2016 and the court denied the motion in August 2016. The court recently postponed the trial date from August 2018 until June 2019. We continue to deny the substantive allegations of the complaint and intend to vigorously defend this lawsuit; however, we are currently unable to determine the ultimate outcome of this case.

In August 2015, we entered into a transition agreement with our former Senior Vice President – Asia, pursuant to which that individual transitioned out of this role at the end of 2015 and was to serve in a consulting capacity in 2016 and 2017. In January 2016, following our discovery that the individual had materially violated the terms of the transition agreement, we terminated the

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TPI COMPOSITES, INC. AND SUBSIDIARIES

Notes to Unaudited Condensed Consolidated Financial Statements

consultancy for cause. In April 2016, an arbitration claim was filed in China by the individual with the Taicang Labor and Personnel Dispute Arbitration Committee alleging that we improperly terminated the transition agreement. The individual is demanding that we honor the terms of the transition agreement and pay compensation and fees under the transition agreement, which in the aggregate totals approximately $2.6 million. In addition, the individual is also challenging the validity of our termination of an option to purchase 164,880 shares of our common stock and 77,760restricted stock units awarded under the 2015 Plan, which were canceled in January 2016 when the consultancywas terminated. The Taicang Labor and Personnel Dispute Arbitration Committee awarded damages to the individual of approximately $1.2 million but rejected the claims regarding the termination of the stock option and restricted stock unit awards. We subsequently appealed the arbitration award in favor of the individual to the Taicang Municipal People’s Court, which affirmed the arbitration award in June 2018. We have appealed this judgment to an appellate level court in the Jiangsu Province and the appeal remains pending. We previously established a reserve for these matters and do not believe the award, if upheld on appeal, will have a material impact on our operating results or financial condition.

In June 2018, Iowa OSHA, a division of the Iowa Department of Labor, issued a citation and notification of penalty to us alleging that certain of our workplace practices and conditions at our Newton, Iowa wind blade manufacturing facility had violated the Iowa Occupational Safety and Health Act. Specifically, the citation cited us for multiple alleged violations and proposed that we pay an aggregate penalty of $0.2 million. In June 2018, we notified Iowa OSHA that we were contesting all of the alleged violations and proposed penalties. In June 2018, the Labor Commissioner of the Iowa Department of Labor subsequently filed a complaint with the State of Iowa Employment Appeal Board, petitioning the appeal board to affirm the citation and notification of penalty that Iowa OSHA issued to us. In July 2018, we then filed a response with the appeal board denying the substantive allegations of the complaint. A hearing date has been set for June 2019 and the matter remains pending.

From time to time, we are party to various lawsuits, claims, and other legal proceedings that arise in the ordinary course of business, some of which are covered by insurance. Upon resolution of any pending legal matters, we may incur charges in excess of presently established reserves. Our management does not believe that any such charges would, individually or in the aggregate, have a material adverse effect on our financial condition, results of operations or cash flows.  

Note 11. Concentration of Customers

Revenues from certain customers in excess of 10 percent of our total consolidated revenues are as follows:

	Three Months Ended										Nine Months Ended
	September 30,										September 30,
	2018					2017					2018					2017
Customer	Revenues		% of Total			Revenues		% of Total			Revenues		% of Total			Revenues		% of Total
	(dollars in thousands)
GE	$	81,699		32.0	%	$	98,962		39.0	%	$	244,534		33.1	%	$	297,550		42.4	%
Vestas		73,584		28.9			72,366		28.6			226,153		30.6			181,215		25.8
Nordex Acciona		46,103		18.1			43,052		17.0			141,663		19.1			126,214		18.0
Siemens Gamesa		33,964		13.3			34,999		13.8			84,782		11.5			86,675		12.4
Other		19,626		7.7			4,119		1.6			42,435		5.7			10,041		1.4
Total	$	254,976		100.0	%	$	253,498		100.0	%	$	739,567		100.0	%	$	701,695		100.0	%

Trade accounts receivable from certain customers in excess of 10 percent of our total consolidated trade accounts receivable are as follows:

	September 30,			December 31,
	2018			2017
Customer	% of Total			% of Total
GE		9.5	%		18.9	%
Vestas		41.1	%		52.4	%
Nordex Acciona		34.6	%		19.5	%

Note 12. Segment Reporting

Our operating segments are defined geographically as the U.S., Asia, Mexico and EMEA. Financial results are aggregated into four reportable segments based on quantitative thresholds. All of our segments operate in their local currency, however a portion of the

18

TPI COMPOSITES, INC. AND SUBSIDIARIES

Notes to Unaudited Condensed Consolidated Financial Statements

revenue attributable to our China and Mexico segments is derived in U.S. dollars because certain of our domestic subsidiaries are the contracting parties to the associated customer supply agreements.

The following tables set forth certain information regarding each of our segments:

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2018			2017			2018			2017
	(in thousands)
Revenues by segment:
U.S.	$	36,689		$	47,725		$	127,508		$	143,307
Asia		70,227			102,953			225,828			261,733
Mexico		79,565			60,694			193,882			158,110
EMEA		68,495			42,126			192,349			138,545
Total revenues	$	254,976		$	253,498		$	739,567		$	701,695
Revenues by geographic location (1):
U.S.	$	36,689		$	47,725		$	127,508		$	143,307
China		70,227			102,953			225,828			261,733
Mexico		79,565			60,694			193,882			158,110
Turkey		68,495			42,126			192,349			138,545
Total revenues	$	254,976		$	253,498		$	739,567		$	701,695
Income (loss) from operations:
U.S. (2)	$	(18,687	)	$	(7,474	)	$	(41,030	)	$	(21,148	)
Asia		7,401			22,104			23,204			55,452
Mexico		5,447			4,883			9,932			8,917
EMEA		13,050			1,478			36,262			8,555
Total income from operations	$	7,211		$	20,991		$	28,368		$	51,776

	September 30,		December 31,
	2018		2017
	(in thousands)
Property, plant and equipment, net:
U.S.	$	34,865	$	24,575
Asia (China)		30,345		28,887
Mexico		63,269		39,756
EMEA (Turkey)		22,452		30,262
Total property, plant and equipment, net	$	150,931	$	123,480

(1) Revenues are attributable to countries based on the location where the product is manufactured or the services are performed.

(2) The losses from operations in our U.S. segment includes corporate general and administrative costs of $9.8 million and $9.3 million for the three months ended September 30, 2018 and 2017, respectively, and $31.9 million and $28.4 million for the nine months ended September 30, 2018 and 2017.

Note 13. Adjustments to Previously Reported Financial Statements from the Adoption of an Accounting Pronouncement

As discussed in Note 1, Summary of Operations and Significant Accounting Policies, Topic 606 and ASUs 2016-15 and 2016-18 were adopted by us as of January 1, 2018 with retrospective application to January 1, 2016 through December 31, 2017.

The following tables summarize the effects of adopting Topic 606 and ASU 2016-18 had on our previously reported financial statements.

19

TPI COMPOSITES, INC. AND SUBSIDIARIES

Notes to Unaudited Condensed Consolidated Financial Statements

Condensed Consolidated Balance Sheet

(In thousands, except par value data)

	December 31, 2017
	As Reported			Adoption of Topic 606			As Adjusted
	(Unaudited)
Assets
Current assets:
Cash and cash equivalents	$	148,113		$	—		$	148,113
Restricted cash		3,849			—			3,849
Accounts receivable		121,576			—			121,576
Contract assets		—			105,619			105,619
Inventories		67,064			(62,952	)		4,112
Inventories held for customer orders		64,858			(64,858	)		—
Prepaid expenses and other current assets		27,507			—			27,507
Total current assets		432,967			(22,191	)		410,776
Property, plant, and equipment, net		123,480			—			123,480
Goodwill		2,807			—			2,807
Intangible assets, net		150			958			1,108
Other noncurrent assets		14,130			4,261			18,391
Total assets	$	573,534		$	(16,972	)	$	556,562
Liabilities and Stockholders’ Equity
Current liabilities:
Accounts payable and accrued expenses	$	166,743		$	—		$	166,743
Accrued warranty		29,163			1,256			30,419
Deferred revenue		81,048			(81,048	)		—
Customer deposits		10,134			(9,702	)		432
Current maturities of long-term debt		35,506			—			35,506
Contract liabilities		—			2,763			2,763
Total current liabilities		322,594			(86,731	)		235,863
Long-term debt, net of debt issuance costs and current maturities		85,879			—			85,879
Other noncurrent liabilities		4,444			494			4,938
Total liabilities		412,917			(86,237	)		326,680
Commitments and contingencies
Stockholders’ equity:
Common shares, $0.01 par value, 100,000 shares authorized and 34,049    shares issued and 34,021 shares outstanding at December 31, 2017		340			—			340
Paid-in capital		301,543			—			301,543
Accumulated other comprehensive loss		(558	)		—			(558	)
Accumulated deficit		(140,197	)		69,265			(70,932	)
Treasury stock, at cost, 28 shares at December 31, 2017		(511	)		—			(511	)
Total stockholders’ equity		160,617			69,265			229,882
Total liabilities and stockholders’ equity	$	573,534		$	(16,972	)	$	556,562

The primary effects of the adoption of Topic 606 on our condensed consolidated balance sheet include 1) amounts being recognized as revenue for work performed as production takes place over time as contract assets, which differs from the prior practice of including the balances in inventory; 2) no longer reporting inventory held for customer orders or deferred revenue since revenue is now being recognized over the course of the production process, and before the product is delivered to the customer; 3) that contract liabilities are reported for amounts collected from customers in advance of the production of products, similar to our prior practice of recording customer deposits; and 4) the cumulative amount of the effect to prior periods’ net income related to the adoption of Topic 606 through December 31, 2017 is reflected in retained earnings.

20

TPI COMPOSITES, INC. AND SUBSIDIARIES

Notes to Unaudited Condensed Consolidated Financial Statements

Condensed Consolidated Income Statement

(In thousands, except per share data)

	Three Months Ended
	September 30, 2017
	As Reported			Adoption of Topic 606			As Adjusted
	(Unaudited)
Net sales	$	243,354		$	10,144		$	253,498
Cost of sales		198,141			12,699			210,840
Startup and transition costs		12,352			—			12,352
Total cost of goods sold		210,493			12,699			223,192
Gross profit		32,861			(2,555	)		30,306
General and administrative expenses		9,315			—			9,315
Income from operations		23,546			(2,555	)		20,991
Other income (expense):
Interest income		48			—			48
Interest expense		(3,254	)		—			(3,254	)
Realized gain on foreign currency remeasurement		39			—			39
Miscellaneous income		390			—			390
Total other expense		(2,777	)		—			(2,777	)
Income before income taxes		20,769			(2,555	)		18,214
Income tax benefit (provision)		(371	)		3,894			3,523
Net income	$	20,398		$	1,339		$	21,737
Weighted-average common shares outstanding:
Basic		33,891			33,891			33,891
Diluted		35,015			35,015			35,015
Net income per common share:
Basic	$	0.60		$	0.04		$	0.64
Diluted	$	0.58		$	0.04		$	0.62

The primary effects of the adoption of Topic 606 on our condensed consolidated income statement relate to amounts being recognized as revenue for work performed as production takes place over time, which differs from the prior practice of recognizing revenue when the product was delivered to the customer.

21

TPI COMPOSITES, INC. AND SUBSIDIARIES

Notes to Unaudited Condensed Consolidated Financial Statements

Condensed Consolidated Income Statement

(In thousands, except per share data)

	Nine Months Ended
	September 30, 2017
	As Reported			Adoption of Topic 606			As Adjusted
	(Unaudited)
Net sales	$	683,142		$	18,553		$	701,695
Cost of sales		568,659			23,836			592,495
Startup and transition costs		29,051			—			29,051
Total cost of goods sold		597,710			23,836			621,546
Gross profit		85,432			(5,283	)		80,149
General and administrative expenses		28,373			—			28,373
Income from operations		57,059			(5,283	)		51,776
Other income (expense):
Interest income		78			—			78
Interest expense		(9,215	)		—			(9,215	)
Realized loss on foreign currency remeasurement		(2,575	)		—			(2,575	)
Miscellaneous income		968			—			968
Total other expense		(10,744	)		—			(10,744	)
Income before income taxes		46,315			(5,283	)		41,032
Income tax provision		(8,514	)		4,009			(4,505	)
Net income	$	37,801		$	(1,274	)	$	36,527
Weighted-average common shares outstanding:
Basic		33,789			33,789			33,789
Diluted		34,748			34,748			34,748
Net income per common share:
Basic	$	1.12		$	(0.04	)	$	1.08
Diluted	$	1.09		$	(0.04	)	$	1.05

The primary effects of the adoption of Topic 606 on our condensed consolidated income statement relate to amounts being recognized as revenue for work performed as production takes place over time, which differs from the prior practice of recognizing revenue when the product was delivered to the customer.

22

TPI COMPOSITES, INC. AND SUBSIDIARIES

Notes to Unaudited Condensed Consolidated Financial Statements

Condensed Consolidated Statement of Comprehensive Income

(In thousands)

	Three Months Ended
	September 30, 2017
	As Reported		Adoption of Topic 606		As Adjusted
	(Unaudited)
Net income	$	20,398	$	1,339	$	21,737
Other comprehensive income:
Foreign currency translation adjustments		1,231		—		1,231
Comprehensive income	$	21,629	$	1,339	$	22,968

	Nine Months Ended
	September 30, 2017
	As Reported		Adoption of Topic 606			As Adjusted
	(Unaudited)
Net income	$	37,801	$	(1,274	)	$	36,527
Other comprehensive income:
Foreign currency translation adjustments		2,808		—			2,808
Comprehensive income	$	40,609	$	(1,274	)	$	39,335

23

TPI COMPOSITES, INC. AND SUBSIDIARIES

Notes to Unaudited Condensed Consolidated Financial Statements

Condensed Consolidated Statements of Changes in Stockholders’ Equity

(In thousands)

	Common				Paid-in		Accumulated other comprehensive			Accumulated			Treasury stock,			Total stockholders'
	Shares		Amount		capital		loss			deficit			at cost			equity
	(Unaudited)
Balance at December 31, 2017 - as reported		34,049	$	340	$	301,543	$	(558	)	$	(140,197	)	$	(511	)	$	160,617
Cumulative effect of the adoption of Topic 606		—		—		—		—			69,265			—			69,265
Balance at December 31, 2017 - as adjusted		34,049	$	340	$	301,543	$	(558	)	$	(70,932	)	$	(511	)	$	229,882

The adoption of Topic 606 increased our total stockholders’ equity in 2015 and 2016 by $61.2 million and $12.3 million, respectively and decreased our total stockholders’ equity in 2017 by $4.2 million.

24

TPI COMPOSITES, INC. AND SUBSIDIARIES

Notes to Unaudited Condensed Consolidated Financial Statements

Condensed Consolidated Statements of Cash Flows

(In thousands)

	Nine Months Ended
	September 30, 2017
	As Reported			Adoption of Topic 606			Adoption of ASU 2016-18			As Adjusted
	(Unaudited)
Cash flows from operating activities:
Net income	$	37,801		$	(1,274	)	$	—		$	36,527
Adjustments to reconcile net income to net cash    provided by operating activities:
Depreciation and amortization		13,622			521			—			14,143
Share-based compensation expense		4,794			—			—			4,794
Amortization of debt issuance costs		430			—			—			430
Deferred income taxes		—			(2,613	)		—			(2,613	)
Changes in assets and liabilities:
Accounts receivable		(66,438	)		—			—			(66,438	)
Contract assets and liabilities		—			7,604			—			7,604
Inventories		(24,979	)		24,644			—			(335	)
Prepaid expenses and other current assets		881			—			—			881
Other noncurrent assets		3,067			(2,619	)		(8,063	)		(7,615	)
Accounts payable and accrued expenses		47,498			585			—			48,083
Accrued warranty		8,238			(103	)		—			8,135
Customer deposits		9,019			(9,019	)		—			—
Deferred revenue		17,726			(17,726	)		—			—
Other noncurrent liabilities		(136	)		—			—			(136	)
Net cash provided by operating activities		51,523			—			(8,063	)		43,460
Cash flows from investing activities:
Purchase of property and equipment		(35,312	)		—			—			(35,312	)
Net cash used in investing activities		(35,312	)		—			—			(35,312	)
Cash flows from financing activities:
Repayments of term loan		(2,812	)		—			—			(2,812	)
Net proceeds from accounts receivable financing		8,196			—			—			8,196
Proceeds from working capital loans		6,620			—			—			6,620
Repayments of working capital loans		(11,258	)		—			—			(11,258	)
Net proceeds from other debt		4,556			—			—			4,556
Proceeds from exercise of stock options		988			—			—			988
Repurchase of common stock including shares withheld in lieu of income taxes		(1,264	)		—			—			(1,264	)
Restricted cash		(1,543	)		—			1,543			—
Net cash provided by financing activities		3,483			—			1,543			5,026
Impact of foreign exchange rates on cash and cash    equivalents		305			—			—			305
Net change in cash and cash equivalents		19,999			—			(6,520	)		13,479
Cash, cash equivalents and restricted cash, beginning of year		119,066			—			10,797			129,863
Cash, cash equivalents and restricted cash, end of period	$	139,065		$	—		$	4,277		$	143,342

The primary effects of the adoption of Topic 606 on our condensed consolidated statement of cash flows include 1) the establishment of contract assets and liabilities; 2) the reduction of inventory and elimination of inventory held for customer orders; and 3) the elimination of deferred revenue. For more details on these items, see the disclosure related to the effect of the adoption of Topic 606 on our condensed consolidated balance sheet.  

25

TPI COMPOSITES, INC. AND SUBSIDIARIES

Notes to Unaudited Condensed Consolidated Financial Statements

As part of our adoption of Topic 606, we have elected to use the following practical expedients:

- for completed contracts that have variable consideration, we have used the transaction price at the date on which the contract was completed, rather than estimating amounts for variable consideration in each comparative reporting period.

- for modified contracts, we did not separately evaluate the effects of the contract modifications before the beginning of the earliest period presented. Instead, we reflected the aggregate effect of all of the modifications that occur before the beginning of the earliest period presented in determining the transaction price, identifying the satisfied and unsatisfied performance obligations, and allocating the transaction price to the performance obligations.

- for all periods presented before the date of initial application, we did not disclose the amount of the transaction price allocated to remaining performance obligations, nor an explanation of when we expect to recognize that amount as revenue.

The impact of applying the above practical expedients may change the period of revenue recognition but not the total amount to be recognized under the contract; therefore, we believe that the application of the practical expedients is not material to the comparability of the information presented above and the accounting and financial reporting related to the adoption of Topic 606.  

26

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

You should read the following discussion and analysis of our financial condition and results of operations together with our condensed consolidated financial statements and the related notes and other financial information appearing elsewhere in this Quarterly Report on Form 10-Q (“Form 10-Q”). Some of the information contained in this discussion and analysis or set forth elsewhere in this Form 10-Q, including information with respect to plans and strategy for our business and related financing, includes forward-looking statements that involve risks and uncertainties. Our actual results could differ materially from those described in or implied by these forward-looking statements as a result of various factors, including those discussed below and elsewhere in this Form 10-Q or in our previously filed Annual Report on Form 10-K, particularly those under “Risk Factors.”

OVERVIEW

Our Company

We are the only independent manufacturer of composite wind blades for the wind energy market with a global manufacturing footprint. We enable many of the industry’s leading wind turbine original equipment manufacturers (OEM), who have historically relied on in-house production, to outsource the manufacturing of some of their wind blades through our global footprint of advanced manufacturing facilities strategically located to serve large and growing wind markets in a cost-effective manner. Given the importance of wind energy capture, turbine reliability and cost to power producers, the size, quality and performance of wind blades have become highly strategic to our OEM customers. As a result, we have become a key supplier to our OEM customers in the manufacture of wind blades and related precision molding and assembly systems. We have entered into long-term supply agreements pursuant to which we dedicate capacity at our facilities to our customers in exchange for their commitment to purchase minimum annual volumes of wind blade sets, which consist of three wind blades. As of November 7, 2018, our long-term wind and transportation supply agreements provide for minimum aggregate volume commitments from our customers of approximately $4.3 billion and encourage our customers to purchase additional volume up to, in the aggregate, a total contract value of approximately $6.3 billion through the end of 2023. This collaborative dedicated supplier model provides us with contracted volumes that generate significant revenue visibility, drive capital efficiency and allow us to produce wind blades at a lower total delivered cost, while ensuring critical dedicated capacity for our customers. Our wind blade and precision molding and assembly systems manufacturing businesses accounted for approximately 95% and 96% of our total net sales for the three months ended September 30, 2018 and 2017, respectively, and 96% and 97% of our total net sales for the nine months ended September 30, 2018 and 2017, respectively. We also leverage our advanced composite technology and history of innovation to supply high strength, lightweight and durable composite products to the transportation market.  

We divide our business operations into four geographic operating segments—the United States (U.S.), Asia, Mexico and Europe, the Middle East and Africa (EMEA) as follows:

• Our U.S. segment includes (1) the manufacturing of wind blades at our Newton, Iowa plant, (2) the manufacturing of precision molding and assembly systems used for the manufacture of wind blades at our Warren, Rhode Island facility, (3) the manufacturing of composite solutions for the transportation industry, which we also conduct at our existing Rhode Island facility as well as at our Fall River, Massachusetts facility and at a second manufacturing facility in Newton, Iowa which commenced operations in the second quarter of 2018, (4) wind blade inspection and repair services in North America, (5) our advanced engineering center in Kolding, Denmark, which provides technical and engineering resources to our manufacturing facilities and (6) our corporate headquarters, the costs of which are included in general and administrative expenses.

• Our Asia segment includes (1) the manufacturing of wind blades at our facility in Taicang Port, China and at our two facilities in Dafeng, China, (2) the manufacturing of precision molding and assembly systems at our Taicang City, China facility and (3) wind blade inspection and repair services. In March 2018, we entered into a new lease agreement with a third party related to the lease of a new manufacturing facility in the Yangzhou Economic & Technical Development Zone in Yangzhou, China and we expect to commence operations at this facility in early 2019.

• Our Mexico segment manufactures wind blades from our three facilities in Juárez, Mexico, the most recent of which commenced operations in January 2017. In April 2017, we entered into a new lease agreement with a third party for a new manufacturing facility in Matamoros, Mexico and we commenced operations at this facility in the third quarter of 2018. This segment also manufactures precision molding and assembly systems and performs wind blade inspection and repair services.

• Our EMEA segment manufactures wind blades from our two facilities in Izmir, Turkey and also performs wind blade inspection and repair services.

27

KEY TRENDS AND RECENT DEVELOPMENTS AFFECTING OUR BUSINESS

The trend of wind turbine OEMs outsourcing production of wind blades remains strong as evidenced by our signing in March 2018 of a new multiyear supply agreement with Vestas Wind Systems A/S for four manufacturing lines at a new manufacturing facility in the Yangzhou Economic & Technical Development Zone in Yangzhou, China. In May 2018, we signed a new multiyear supply agreement with ENERCON GmbH for two manufacturing lines at a one of our manufacturing facilities in Izmir, Turkey.  In May and July 2018, Vestas exercised its option for a total of four additional manufacturing lines at our new manufacturing facility in Matamoros, Mexico.

For the nine months ended September 30, 2018, we have incurred $53.5 million related to startup costs in our new plants in Turkey, Mexico and Iowa, the startup costs related to a new customer in Taicang, China and transition costs related to the 15 lines in transition.

These significant startup and transition costs along with the lost contribution margin on lower wind blade volumes during the transitions have had a negative impact on our profitability for the nine months ended September 30, 2018. We believe that these startups and wind blade model transitions provide a foundation for revenue growth in 2019 and beyond due to the increased number of manufacturing lines in production and the increased average selling price associated with these larger wind blade models. We also expect to continue to incur significant startup and transition costs in 2019, although less than in 2018, as we continue to expand our global manufacturing footprint.

COMPONENTS OF RESULTS OF OPERATIONS

Net Sales

We recognize revenue from manufacturing services over time as the customer controls the product as it is produced, and we may not use or sell the product to fulfill other customers’ contracts. Net sales include amounts billed to our customers for our products, including wind blades, precision molding and assembly systems and other products and services, as well as the progress towards the completion of the performance obligation for products in progress, which is determined on a ratio of direct costs incurred to date in fulfillment of the contract to the total estimated direct costs required to complete the performance obligation.

Cost of Goods Sold

Cost of goods sold includes the costs we incur at our production facilities to make products saleable on both products invoiced during the period as well as products in progress towards the completion of each performance obligation. Cost of goods sold includes such items as raw materials, direct and indirect labor and facilities costs, including purchasing and receiving costs, plant management, inspection costs, product engineering and internal transfer costs. In addition, all depreciation associated with assets used in the production of our products is also included in cost of goods sold. Direct labor costs consist of salaries, benefits and other personnel related costs for employees engaged in the manufacture of our products and services.

Startup costs represent the unallocated overhead related to both new manufacturing facilities as well as new lines in existing manufacturing facilities. Transition costs represent the unallocated overhead related to the transition of wind blade models at the request of our customers. The startup and transition costs are primarily fixed overhead costs incurred during the period production facilities are under-utilized while transitioning wind blade models and ramping up manufacturing, which are not allocated to products and are expensed as incurred. The cost of sales for the initial wind blades from a new model manufacturing line is generally higher than when the line is operating at optimal production volume levels due to inefficiencies during ramp-up related to labor hours per blade, cycle times per blade and raw material usage. Additionally, manufacturing overhead as a percentage of net sales is generally higher during the period in which a facility is ramping up to full production capacity due to underutilization of the facility. Manufacturing overhead at each of our facilities includes virtually all indirect costs (including share-based compensation costs) incurred at the plants, including engineering, finance, information technology, human resources and plant management.

General and Administrative Expenses

General and administrative expenses are primarily incurred at our corporate headquarters and our research facilities and include salaries, benefits and other personnel related costs for employees engaged in research and development, engineering, finance, information technology, human resources, business development, global operational excellence, global supply chain, in-house legal and executive management. Other costs include outside legal and accounting fees, risk management (insurance), share-based compensation and certain other administrative and global resources costs.

The research and development expenses incurred at our Warren, Rhode Island and Fall River, Massachusetts locations as well as at our Kolding, Denmark advanced engineering center are included in general and administrative expenses. For the three months ended September 30, 2018 and 2017 and for the nine months ended September 30, 2018 and 2017, these expenses totaled $0.2 million, $0.3

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million, $0.6 million and $1.1 million, respectively. Research and development performed at our manufacturing facilities is included in cost of goods sold.

Other Income (Expense)

Other income (expense) consists primarily of interest expense on our debt borrowings and the amortization of deferred financing costs on such borrowings. Other income (expense) also includes realized gains and losses on foreign currency remeasurement, interest income, losses on extinguishment of debt and miscellaneous income and expense.

Income Tax Provision

Income tax provision consists of federal, state, provincial, local and foreign taxes based on income in jurisdictions in which we operate, including in the U.S., China, Mexico and Turkey. The composite income tax rate, tax provisions, deferred tax assets and liabilities vary according to the jurisdiction in which the income or loss arises. Tax laws are complex and subject to different interpretations by management and the respective governmental taxing authorities, and require us to exercise judgment in determining our income tax provision, our deferred tax assets and liabilities and the valuation allowance recorded against our net deferred tax assets.

KEY FINANCIAL MEASURES

In addition to measures of financial performance presented in our consolidated financial statements in accordance with GAAP, we use certain other financial measures and operating metrics to analyze our performance. These “non-GAAP” financial measures consist of total billings, EBITDA, adjusted EBITDA, free cash flow and net cash (debt), which help us evaluate growth trends, establish budgets, assess operational efficiencies, oversee our overall liquidity, and evaluate our overall financial performance. The key operating metrics consist of wind blade sets invoiced, estimated megawatts of energy capacity for wind blade sets invoiced, manufacturing lines dedicated to customers under long-term supply agreements, total manufacturing lines installed, manufacturing lines in startup and manufacturing lines in transition, which help us evaluate our operational performance. We believe that these measures are useful to investors in evaluating our performance.

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2018		2017		2018			2017
	(in thousands)
Net sales	$	254,976	$	253,498	$	739,567		$	701,695
Total billings (1)	$	240,699	$	256,404	$	701,755		$	698,833
Net income	$	9,532	$	21,737	$	14,127		$	36,527
EBITDA (1)	$	7,419	$	26,847	$	38,494		$	64,312
Adjusted EBITDA (1)	$	17,572	$	27,851	$	58,422		$	71,681
Capital expenditures					$	50,636		$	35,312
Free cash flow (1)					$	(33,441	)	$	8,148

	September 30,			December 31,
	2018			2017
	(in thousands)
Total debt, net of debt issuance costs	$	132,784		$	121,385
Net cash (debt) (1)	$	(22,876	)	$	24,557

(1) See below for more information and a reconciliation of total billings, EBITDA, adjusted EBITDA, free cash flow and net cash (debt) to net sales, net income, net income, net cash provided by operating activities and total debt, net of debt issuance costs, respectively, the most directly comparable financial measures calculated and presented in accordance with GAAP.

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Total billings

We define total billings, a non-GAAP financial measure, as the total amounts we have invoiced our customers for products and services for which we are entitled to payment under the terms of our long-term supply agreements or other contractual agreements. We monitor total billings, and believe it is useful to present to investors as a supplement to our GAAP measures, because we believe it more directly correlates to sales activity and operations based on the timing of actual transactions with our customers, which facilitates comparison of our performance between periods and provides a more timely indication of trends in sales. Under GAAP, total net sales recognized on products in production represents the total amount that we have recognized as revenue under the cost-to-cost method for services performed during the period under our long-term supply agreements. Under our long-term supply agreements with our customers, we invoice our customers for wind blades once the blades pass certain acceptance procedures and title passes to our customers. Our customers generally pay us for the wind blades between 15 to 65 days after receipt of the invoice based on negotiated payment terms. However, in many cases, our customers request that we store their wind blades until they are ready to assemble wind turbines at a particular wind farm project. We have no control over when our customers decide to ship wind blades from our storage sites, and in some cases, our customers have stored large numbers of their wind blades on our sites for six months or more. However, we are contractually entitled to payment for those wind blades and, accordingly, invoice them when the blades are placed in storage.  

EBITDA and Adjusted EBITDA

We define EBITDA, a non-GAAP financial measure, as net income or loss plus interest expense (including losses on extinguishment of debt and net of interest income), income taxes and depreciation and amortization. We define adjusted EBITDA as EBITDA plus any share-based compensation expense plus or minus any realized gains or losses from foreign currency remeasurement. Adjusted EBITDA is the primary metric used by our management and our board of directors to establish budgets and operational goals for managing our business and evaluating our performance. In addition, our Credit Facility contains minimum EBITDA (as defined in the Credit Facility) covenants with which we must comply. We monitor adjusted EBITDA as a supplement to our GAAP measures, and believe it is useful to present to investors, because we believe that it facilitates evaluation of our period-to-period operating performance by eliminating items that are not operational in nature, allowing comparison of our recurring core business operating results over multiple periods unaffected by differences in capital structure, capital investment cycles and fixed asset base. In addition, we believe adjusted EBITDA and similar measures are widely used by investors, securities analysts, ratings agencies, and other parties in evaluating companies in our industry as a measure of financial performance and debt-service capabilities.

Our uses of EBITDA and adjusted EBITDA have limitations as analytical tools, and you should not consider them in isolation or as substitutes for analysis of our results as reported under GAAP.

In evaluating EBITDA and adjusted EBITDA, you should be aware that in the future, we will incur expenses similar to the adjustments noted herein. Our presentations of EBITDA and adjusted EBITDA should not be construed as suggesting that our future results will be unaffected by these expenses or any unusual or non-recurring items. When evaluating our performance, you should consider EBITDA and adjusted EBITDA alongside other financial performance measures, including our net income and other GAAP measures.

Free cash flow

We define free cash flow as net cash provided by operating activities less capital expenditures. We believe free cash flow is a useful measure for investors because it portrays our ability to generate cash from our business for purposes such as repaying maturing debt and funding business acquisitions.

Net cash (debt)

We define net cash (debt) as total unrestricted cash and cash equivalents less the total principal amount of debt outstanding. The total principal amount of debt outstanding is comprised of the long-term debt and current maturities of long-term debt as presented in our condensed consolidated balance sheets adding back any debt issuance costs and discounts. We believe that the presentation of net cash (debt) provides useful information to investors because our management reviews net cash (debt) as part of our oversight of overall liquidity, financial flexibility and leverage. Net cash (debt) is important when we consider opening new plants and expanding existing plants, as well as for capital expenditure requirements.

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The following tables reconcile our non-GAAP key financial measures to the most directly comparable GAAP measures:

Total billings, EBITDA and adjusted EBITDA are reconciled as follows:

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2018			2017			2018			2017
	(in thousands)
Net sales	$	254,976		$	253,498		$	739,567		$	701,695
Change in gross contract assets		(1,434	)		2,895			(24,526	)		(827	)
Foreign exchange impact (1)		(12,843	)		11			(13,286	)		(2,035	)
Total billings	$	240,699		$	256,404		$	701,755		$	698,833
Net income	$	9,532		$	21,737		$	14,127		$	36,527
Adjustments:
Depreciation and amortization		5,878			5,427			19,080			14,143
Interest expense (net of interest income)		2,278			3,206			8,247			9,137
Loss on extinguishment of debt		—			—			3,397			—
Income tax provison (benefit)		(10,269	)		(3,523	)		(6,357	)		4,505
EBITDA		7,419			26,847			38,494			64,312
Share-based compensation expense		1,972			1,043			6,971			4,794
Realized loss (gain) on foreign currency remeasurement		8,181			(39	)		12,957			2,575
Adjusted EBITDA	$	17,572		$	27,851		$	58,422		$	71,681

(1) Represents the effect of the difference in the exchange rates used by our various foreign subsidiaries when converted to U.S. dollars on the net sales and contract assets as of period-end.

Free cash flow is reconciled as follows:

	Nine Months Ended
	September 30,
	2018			2017
	(in thousands)
Net cash provided by operating activities	$	17,195		$	43,460
Less capital expenditures		(50,636	)		(35,312	)
Free cash flow	$	(33,441	)	$	8,148

Net cash (debt) is reconciled as follows:

	September 30,			December 31,
	2018			2017
	(in thousands)
Cash and cash equivalents	$	110,838		$	148,113
Less total debt, net of debt issuance costs		(132,784	)		(121,385	)
Less debt issuance costs		(930	)		(2,171	)
Net cash (debt)	$	(22,876	)	$	24,557

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KEY OPERATING METRICS

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2018		2017		2018		2017
Sets		589		739		1,734		2,067
Estimated megawatts		1,625		1,796		4,633		4,876
Dedicated manufacturing lines		51		48		51		48
Total manufacturing lines installed		39		38		39		41
Manufacturing lines in startup		5		10		13		12
Manufacturing lines in transition		6		—		15		—

Sets represents the number of wind blade sets, consisting of three wind blades each, which we invoiced worldwide during the period. We monitor sets and believe that presenting sets to investors is helpful because we believe that it is the most direct measurement of our manufacturing output during the period. Sets primarily impact net sales and total billings.  

Estimated megawatts are the energy capacity to be generated by wind blade sets invoiced in the period. Our estimate is based solely on name-plate capacity of the wind turbine on which our wind blades are expected to be installed. We monitor estimated megawatts and believe that presenting estimated megawatts to investors is helpful because we believe that it is a commonly followed measurement of energy capacity across our industry and provides an indication of our share of the overall wind blade market.

Dedicated manufacturing lines are the number of wind blade manufacturing lines that we have dedicated to our customers pursuant to our long-term supply agreements at the end of the period. We monitor dedicated manufacturing lines and believe that presenting this metric to investors is helpful because we believe that the number of dedicated manufacturing lines is the best indicator of demand for our wind blades from customers under our long-term supply agreements in any given period. Dedicated manufacturing lines primarily impacts our net sales and total billings.

Total manufacturing lines installed represents the number of wind blade manufacturing lines installed and either in operation, startup or transition at the end of the period.

Manufacturing lines in startup is the number of dedicated wind blade manufacturing lines that were in a startup phase during the pre-production and production ramp up period, pursuant to the opening of a new manufacturing facility, the expansion of an existing manufacturing facility or the addition of new manufacturing lines in an existing manufacturing facility. We monitor and present this metric because we believe it helps investors to better understand the impact of the startup phase of our new manufacturing facilities on our gross profit and net income.

Manufacturing lines in transition is the number of wind blade manufacturing lines that were being transitioned to a new wind blade model during the period. We monitor and present this metric because we believe it helps investors to better understand the impact of these transitions on our gross profit and net income.

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Results of Operations

Three Months Ended September 30, 2018 Compared to Three Months Ended September 30, 2017

The following table summarizes certain information relating to our operating results and related percentage of net sales for the three months ended September 30, 2018 and 2017 that has been derived from our unaudited condensed consolidated financial statements.  

	Three Months Ended
	September 30,
	2018					2017
	(dollars in thousands)
Net sales	$	254,976		100.0	%	$	253,498		100.0	%
Cost of sales		216,594		84.9			210,840		83.1
Startup and transition costs		21,415		8.4			12,352		4.9
Total cost of goods sold		238,009		93.3			223,192		88.0
Gross profit		16,967		6.7			30,306		12.0
General and administrative expenses		9,756		3.8			9,315		3.7
Income from operations		7,211		2.9			20,991		8.3
Other expense		(7,948	)	(3.2	)		(2,777	)	(1.1	)
Income (loss) before income taxes		(737	)	(0.3	)		18,214		7.2
Income tax benefit		10,269		4.0			3,523		1.4
Net income	$	9,532		3.7	%	$	21,737		8.6	%

Net sales for the three months ended September 30, 2018 increased by $1.5 million or 0.6% to $255.0 million compared to $253.5 million in the same period in 2017. Net sales of wind blades decreased by 1.3% to $234.9 million for the three months ended September 30, 2018 as compared to $238.1 million in the same period in 2017. The decrease was primarily driven by a 19.1% decrease in the number of wind blades produced during the three months ended September 30, 2018 compared to the same period in 2017 as a result of the increase in lines in transition, the lost volume from two contracts that expired at the end of 2017, a delayed customer startup and by foreign currency fluctuations. This was partially offset by higher average sales prices due to the mix of wind blade models produced during the three months ended September 30, 2018 compared to the same period in 2017. Net sales from the manufacturing of precision molding and assembly systems during the three months ended September 30, 2018 increased to $8.5 million from $5.5 million in the same period in 2017. This increase was primarily the result of our customers requiring more precision molding and assembly systems from our tooling facilities during the three months ended September 30, 2018 as compared to the same period in 2017 as a result of the blade transitions and startups during the 2018 period. Additionally, there was a $1.6 million increase in non-wind related net sales during the three months ended September 30, 2018 as compared to the same period in 2017. Total billings were $240.7 million for the three months ended September 30, 2018 compared to $256.4 million in the 2017 period. The impact of the fluctuating U.S. dollar against the Euro at our Turkey operations and the Chinese Renminbi at our China operations on consolidated net sales and total billings for the three months ended September 30, 2018 was a net decrease of 1.1% and 1.2%, respectively, as compared to 2017.

Total cost of goods sold for the three months ended September 30, 2018 was $238.0 million and included $19.0 million related to startup costs in our new plants in Turkey, Mexico and Iowa, the startup costs related to a new customer in Taicang, China and $2.4 million of transition costs related to the six lines in transition during the quarter. This compares to total cost of goods sold for the three months ended September 30, 2017 of $223.2 million, including $12.4 million related to startup costs in our new plants in Turkey and Mexico and the startup of new wind blade models for certain of our customers in Turkey and Dafeng, China. Cost of goods sold as a percentage of net sales increased by five percentage points during the three months ended September 30, 2018 as compared to the same period in 2017, driven by the increase in startup and transition costs, partially offset by foreign currency fluctuations and the impact of savings in raw material costs. The impact of the fluctuating U.S. dollar against the Euro, Turkish Lira, Chinese Renminbi and Mexican Peso decreased consolidated cost of goods sold by 5.1% for three months ended September 30, 2018 as compared to 2017.

General and administrative expenses for the three months ended September 30, 2018 totaled $9.8 million as compared to $9.3 million for the same period in 2017. As a percentage of net sales, general and administrative expenses were 3.8% for the three months ended September 30, 2018, up from 3.7% in the same period in 2017.  

Other expense totaled $7.9 million for the three months ended September 30, 2018 as compared to $2.8 million for the same period in 2017. The amount for the three months ended September 30, 2018 was primarily comprised of realized losses on foreign currency remeasurement of $8.2 million and  interest expense of $2.3 million, partially offset by miscellaneous income of $2.5 million. This compares to interest expense of $3.3 million, partially offset by miscellaneous income of $0.4 million in the three months ended September 30, 2017.  

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Income taxes reflected a benefit of$10.3million (which is net of a tax provision of $0.6 million) for the three months ended September 30, 2018as compared to a benefit of $3.5 million for the same period in 2017. The benefit was primarily due to the reversal of our valuation allowances related to our U.S. federal deferred tax assets in the 2018 period.

Net income for the three months ended September 30, 2018 was $9.5 million as compared to net income of $21.7 million in the same period in 2017. The decrease was primarily due to the reasons set forth above.  Diluted earnings per share was $0.26 for the three months ended September 30, 2018, compared to $0.62 for the three months ended September 30, 2017.

Segment Discussion

The following table summarizes our net sales and income (loss) from operations by our four geographic operating segments for the three months ended September 30, 2018 and 2017 that has been derived from our unaudited condensed consolidated financial statements.

	Three Months Ended
	September 30,
	2018		2017
Net Sales	(in thousands)
U.S.	$	36,689	$	47,725
Asia		70,227		102,953
Mexico		79,565		60,694
EMEA		68,495		42,126
Total net sales	$	254,976	$	253,498

	Three Months Ended
	September 30,
	2018			2017
Income (Loss) from Operations	(in thousands)
U.S. (1)	$	(18,687	)	$	(7,474	)
Asia		7,401			22,104
Mexico		5,447			4,883
EMEA		13,050			1,478
Total income from operations	$	7,211		$	20,991

(1) Includes the costs of our corporate headquarters and our advanced engineering center in Kolding, Denmark totaling $9.8 million and $9.3 million for the three months ended September 30, 2018 and 2017, respectively.

U.S. Segment

Net sales in the three months ended September 30, 2018 decreased to $36.7 million compared to $47.7 million in the same period in 2017. Net sales of wind blades decreased to $28.1 million during the three months ended September 30, 2018 as compared to $41.3 million in the same period of 2017. The decrease was primarily due to a 8.6% reduction in the number of wind blades produced in the three months ended September 30, 2018 as compared to the same period in 2017 and a decline in the average sales prices of the same wind blade models delivered in both periods as a result of savings in raw material costs, a portion of which we share with our customer. Net sales from the manufacturing of precision molding and assembly systems during the three months ended September 30, 2018 were $0.8 million compared to $0.5 million during the same period in 2017. Additionally, there was a $1.9 million increase in non-wind related net sales during the three months ended September 30, 2018 as compared to the same period in 2017.

The loss from operations for the three months ended September 30, 2018 was $18.7 million as compared to a loss of $7.5 million in the same period in 2017. These amounts include corporate general and administrative costs of $9.8 million and $9.3 million for the three months ended September 30, 2018 and 2017, respectively. The operating results were unfavorably impacted by start up costs related to our second Iowa facility and the lower wind blade volume discussed above, notwithstanding higher non-wind related net sales.

Asia Segment

Net sales in the three months ended September 30, 2018 decreased by $32.7 million or 31.8% to $70.2 million compared to $103.0 million in the same period in 2017. Net sales of wind blades were $61.1 million in the three months ended September 30, 2018 compared to $96.7 million in the same period of 2017. This decrease was primarily due to a 50.1% decrease in the number of wind blades produced in the three months ended September 30, 2018 as compared to the same period in 2017 primarily the result of lost

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volume from a contract that expired at the end of 2017and the delayed startup of a new customer in 2018. This decrease was partially offset by a higher average sales prices due to the mix of wind blade models produced during the three months ended September 30, 2018 compared to the same period in 2017. Net sales from the manufacturing of precision molding and assembly systems totaled $7.6 million during the three months ended September 30, 2018 compared to $4.2 million during the same period in 2017. The impact of the fluctuating U.S. dollar against the Chinese Renminbi had an unfavorable impact of 0.5% on net sales during the three months ended September 30, 2018as compared to the same period in 2017.

Income from operations in the Asia segment for the three months ended September 30, 2018 was $7.4 million as compared to $22.1 million in the same period in 2017. This decrease was driven by lower wind blade volume discussed above and startup costs incurred at our Taicang plant for a new customer. This was partially offset by the fluctuating U.S. dollar against the Chinese Renminbi which had a favorable impact of 5.0% on cost of goods sold for the three months ended September 30, 2018 as compared to the 2017 period.

Mexico Segment

Net sales in the three months ended September 30, 2018 increased by $18.9 million or 31.1% to $79.6 million compared to $60.7 million in the same period in 2017. The increase reflects a 9.1% net increase in overall wind blade volume driven by greater volume at our second and third Mexico plants, partially offset by a decrease in wind blade volume at our first Mexico plant. These increases were also impacted by an increase in the average sales prices of wind blades due to a change in the mix of wind blades between the two periods.

Income from operations in the Mexico segment for the three months ended September 30, 2018 was $5.4 million as compared to $4.9 million in the same period in 2017. The increase in income from operations was due to the overall increase in wind blade volume noted above as well as from savings in raw material costs and production efficiencies, partially offset by higher startup costs related to our new facility in Matamoros, Mexico. The fluctuating U.S. dollar relative to the Mexican Peso had a favorable impact of 0.9% on cost of goods sold for the three months ended September 30, 2018 as compared to 2017.

EMEA Segment

Net sales during the three months ended September 30, 2018 increased by $26.4 million or 62.6% to $68.5 million compared to $42.1 million in the same period in 2017. The increase was driven by a 35.6% increase in wind blade volume at our first Turkey plant and a 44.0% increase in wind blade production in our second Turkey plant. Other items having a favorable impact on net sales include overall higher average sales prices of wind blades delivered in the comparative periods due to the beginning of wind blade production in our second Turkey plant and the mix of wind blades sold during the period.  The fluctuating U.S. dollar relative to the Euro had an unfavorable impact of 3.7% on net sales during the three months ended September 30, 2018 as compared to 2017.

Income from operations in the EMEA segment for the three months ended September 30, 2018 was $13.1 million as compared to $1.5 million in the same period in 2017. The increase was primarily driven by the increased wind blade production in our two Turkey plants, improved operating efficiency at both of our Turkey plants, savings in raw materials, lower startup costs and the favorable impact on cost of goods sold of the fluctuation of the U.S. dollar relative to the Turkish Lira and Euro of 14.8% in the three months ended September 30, 2018 as compared to 2017.  

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Nine Months Ended September 30, 2018 Compared to NineMonths Ended September 30, 2017

The following table summarizes certain information relating to our operating results and related percentage of net sales for the nine months ended September 30, 2018 and 2017 that has been derived from our unaudited condensed consolidated financial statements.

	Nine Months Ended
	September 30,
	2018					2017
	(dollars in thousands)
Net sales	$	739,567		100.0	%	$	701,695		100.0	%
Cost of sales		625,817		84.6			592,495		84.5
Startup and transition costs		53,474		7.2			29,051		4.1
Total cost of goods sold		679,291		91.8			621,546		88.6
Gross profit		60,276		8.2			80,149		11.4
General and administrative expenses		31,908		4.3			28,373		4.0
Income from operations		28,368		3.9			51,776		7.4
Other expense		(20,598	)	(2.8	)		(10,744	)	(1.5	)
Income before income taxes		7,770		1.1			41,032		5.9
Income tax benefit (provision)		6,357		0.8			(4,505	)	(0.7	)
Net income	$	14,127		1.9	%	$	36,527		5.2	%

Net sales for the nine months ended September 30, 2018 increased by $37.9 million or 5.4% to $739.6 million compared to $701.7 million in the same period in 2017. Net sales of wind blades increased by 2.4% to $675.4 million for the nine months ended September 30, 2018 as compared to $659.5 million in the same period in 2017. The increase was primarily driven by higher average sales prices due to the mix of wind blade models produced during the nine months ended September 30, 2018 compared to the same period in 2017. This increase was partially offset by a 15.3% decrease in the number of wind blades produced during the nine months ended September 30, 2018 compared to the same period in 2017 due to the number of transitions during the period as well as the loss of volume from two contracts that expired at the end of 2017. Net sales from the manufacturing of precision molding and assembly systems during the nine months ended September 30, 2018 increased to $31.6 million from $18.3 million in the same period in 2017. This increase was primarily the result of our customers requiring more precision molding and assembly systems from our tooling facilities during the nine months ended September 30, 2018 as compared to the same period in 2017 as a result of the blade transitions and startups during the first nine months of 2018. Additionally, there was a $8.6 million increase in non-wind related net sales during the nine months ended September 30, 2018 as compared to the same period in 2017. Total billings for the nine months ended September 30, 2018 increased by $2.9 million or 0.4% to $701.8 million compared to $698.8 million in the same period in 2017. The impact of the fluctuating U.S. dollar against the Euro at our Turkey operations and the Chinese Renminbi at our China operations on consolidated net sales and total billings for the nine months ended September 30, 2018 was a favorable increase of 0.9% and 1.0%, respectively, as compared to 2017.

Total cost of goods sold for the nine months ended September 30, 2018 was $679.3 million and included $41.4 million related to startup costs in our new plants in Turkey, Mexico and Iowa, the startup costs related to a new customer in Taicang, China and $12.1 million of transition costs related to the 15 lines in transition. This compares to total cost of goods sold for the nine months ended September 30, 2017 of $621.5 million, including $29.1 million related to startup costs in our new plants in Turkey and Mexico and the startup of new wind blade models for certain of our customers in Turkey and Dafeng, China. Cost of goods sold as a percentage of net sales increased by three percentage points during the nine months ended September 30, 2018 as compared to the same period in 2017, driven by the increase in startup and transition costs, partially offset by improved operating efficiencies and the impact of savings in raw material costs. The impact of the fluctuating U.S. dollar against the Euro, Turkish Lira, Chinese Renminbi and Mexican Peso decreased consolidated cost of goods sold by 0.9% for the nine months ended September 30, 2018 as compared to 2017.

General and administrative expenses for the nine months ended September 30, 2018 totaled $31.9 million as compared to $28.4 million for the same period in 2017. As a percentage of net sales, general and administrative expenses were 4.3% for the nine months ended September 30, 2018, up from 4.0% in the same period in 2017. The increase in expenses was primarily driven by additional costs incurred related to the implementation of ASU 2014-09, Revenue from Contracts with Customers (Topic 606), costs related to our work related to the Sarbanes-Oxley Act, costs related to our advanced engineering center, increased personnel costs from filling our key global positions to support our growth and diversification strategy, additional depreciation expense related to our enhanced corporate infrastructure and increased share-based compensation expense.

Other expense totaled $20.6 million for the nine months ended September 30, 2018 as compared to $10.7 million for the same period in 2017. The amount for the nine months ended September 30, 2018 was primarily comprised of realized losses on foreign currency remeasurement of $13.0 million, interest expense of $8.4 million, and a loss on extinguishment of debt of $3.4 million, partially offset

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by miscellaneous income of $4.0 million. This compares to interest expense of $9.2 million and realized losses on foreign currency remeasurement of $2.6 million, partially offset by miscellaneous income of $1.0 million in the nine months ended September 30, 2017.

Income taxes reflected a benefit of $6.4 million (which is net of a tax provision of $4.5 million) for the nine months ended September 30, 2018 as compared to a provision of $4.5 million for the same period in 2017. The benefit was primarily due to the reversal of our valuation allowances related to our U.S. federal deferred tax assets in the 2018 period.

Net income for the nine months ended September 30, 2018 was $14.1 million as compared to $36.5 million in the same period in 2017. The decrease was primarily due to the reasons set forth above. Diluted earnings per share was $0.39 for the nine months ended September 30, 2018, compared to $1.05 for the nine months ended September 30, 2017.

Segment Discussion

The following table summarizes our net sales and income (loss) from operations by our four geographic operating segments for the nine months ended September 30, 2018 and 2017 that has been derived from our unaudited condensed consolidated financial statements.

	Nine Months Ended
	September 30,
	2018		2017
Net Sales	(in thousands)
U.S.	$	127,508	$	143,307
Asia		225,828		261,733
Mexico		193,882		158,110
EMEA		192,349		138,545
Total net sales	$	739,567	$	701,695

	Nine Months Ended
	September 30,
	2018			2017
Income (loss) from Operations	(in thousands)
U.S. (1)	$	(41,030	)	$	(21,148	)
Asia		23,204			55,452
Mexico		9,932			8,917
EMEA		36,262			8,555
Total income from operations	$	28,368		$	51,776

(1) Includes the costs of our corporate headquarters totaling $31.9 million and $28.4 million for the nine months ended September 30, 2018 and 2017, respectively.

U.S. Segment

Net sales in the nine months ended September 30, 2018 decreased by $15.8 million or 11.0% to $127.5 million compared to $143.3 million in the same period in 2017. Net sales of wind blades decreased to $100.7 million during the nine months ended September 30, 2018 from $125.8 million in the same period of 2017. The decrease was primarily due to a 6.6% reduction in the number of wind blades produced in the nine months ended September 30, 2018 as compared to the same period in 2017 and a decline in the average sales prices of the same wind blade models delivered in both periods as a result of savings in raw material costs, a portion of which we share with our customer. Net sales from the manufacturing of precision molding and assembly systems during the nine months ended September 30, 2018 were $5.0 million compared to $5.4 million during the same period in 2017. Additionally, there was a $9.8 million increase in non-wind related net sales, primarily transportation sales, during the nine months ended September 30, 2018 as compared to 2017.

The loss from operations for the nine months ended September 30, 2018 was $41.0 million as compared to a loss of $21.1 million in the same period in 2017. These amounts include corporate general and administrative costs of $31.9 million for the nine months ended September 30, 2018 compared to $28.4 million for the nine months ended September 30, 2017. The increase in the corporate general and administrative costs was primarily driven by additional costs incurred related to the implementation of Topic 606, costs related to our work related to the Sarbanes-Oxley Act, increased personnel costs from filling our key global positions to support our growth and diversification strategy, costs related to our advanced engineering center, additional depreciation expense related to our enhanced

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corporate infrastructure and an increase in share-based compensation expense. The operating results were also unfavorably impacted by the start up costs related to our second Iowa facility and the lower wind blade volume discussed above.

Asia Segment

Net sales in the nine months ended September 30, 2018 decreased by $35.9 million or 13.7% to $225.8 million compared to $261.7 million in the same period in 2017. Net sales of wind blades were $196.5 million in the nine months ended September 30, 2018 as compared to $245.6 million in the same period of 2017. The decrease was primarily due to a 34.4% decrease in the number of wind blades produced during the nine months ended September 30, 2018 compared to the same period in 2017 primarily due to the expiration of a contract at the end of 2017 and the delayed startup of a new customer in 2018. This decrease was partially offset by a higher average sales prices due to the mix of wind blade models produced during the nine months ended September 30, 2018 compared to the same period in 2017. Net sales from the manufacturing of precision molding and assembly systems totaled $25.5 million during the 2018 period compared to $11.2 million during the nine months ended September 30, 2017. The impact of the fluctuating U.S. dollar against the Chinese Renminbi had a favorable impact of 1.2% on net sales during the nine months ended September 30, 2018 as compared to the same period in 2017.

Income from operations in the Asia segment for the nine months ended September 30, 2018 was $23.2 million as compared to $55.5 million in the same period in 2017. This decrease was driven by the startup costs incurred at our Taicang Port plant for a new customer and lower wind blade volume discussed above. The fluctuating U.S. dollar against the Chinese Renminbi had an unfavorable impact of 0.6% on cost of goods sold for the nine months ended September 30, 2018 as compared to the comparable 2017 period.

Mexico Segment

Net sales in the nine months ended September 30, 2018 increased by $35.8 million or 22.6% to $193.9 million compared to $158.1 million in the same period in 2017. The increase reflects an 9.5% net increase in overall wind blade volume driven by greater volume at our second and third Mexico plants, partially offset by a decrease in wind blade volume at our first Mexico plant. These increases were also impacted by an increase in the average sales prices of wind blades due to a change in the mix of wind blades between periods.

Income from operations in the Mexico segment for the nine months ended September 30, 2018 was $9.9 million as compared to $8.9 million in the same period in 2017. The increase was driven by the overall increase in wind blade volume noted above as well as from savings in raw material costs and production efficiencies, partially offset by higher startup costs related to our new facility in Matamoros, Mexico.  

EMEA Segment

Net sales during the nine months ended September 30, 2018 increased by $53.8 million or 38.8% to $192.3 million compared to $138.5 million in the same period in 2017. The increase was driven by a 70.1% increase in wind blade production in our second Turkey plant, partially offset by a 30.6% decrease in wind blade volume at our first Turkey plant as a result of the December 31, 2017 conclusion of our supply agreement with GE. We accelerated production for GE in 2017 and completed 100% of GE volume by the end of June 2017 to enable us to accelerate the transition of those manufacturing lines to two new manufacturing lines for another customer in the second half of 2017. Other items having a favorable impact on net sales include overall higher average sales prices of wind blades delivered in the comparative periods due to the beginning of wind blade production in our second Turkey plant, the mix of wind blades sold during the period as well as the impact of the fluctuating U.S. dollar relative to the Euro of 2.2% as compared to 2017.

Income from operations in the EMEA segment for the nine months ended September 30, 2018 was $36.3 million as compared to $8.6 million in the same period in 2017. The increase was primarily driven by the wind blade production in our second Turkey plant, improved operating efficiency at our first Turkey plant and savings in raw materials. The fluctuation of the U.S. dollar relative to the Turkish Lira and Euro had a 4.8% favorable impact on cost of goods sold in nine months ended September 30, 2018 as compared to 2017.  

Liquidity and Capital Resources

Our primary needs for liquidity have been, and in the future will continue to be, capital expenditures, new facility startup costs, transition costs, working capital and debt service costs. Our capital expenditures have been primarily related to machinery and equipment for new facilities or facility expansions. Historically, we have funded our working capital needs through cash flows from operations, the proceeds received from our credit facilities and from proceeds received from the issuance of our common stock. We had net repayments on financing arrangements of $3.6 million for the nine months ended September 30, 2018 as compared to net borrowings on financing arrangements of $5.3 million in the comparable period of 2017. As of September 30, 2018, we had $133.7 million in outstanding indebtedness, excluding debt issuance costs. As of September 30, 2018, as a result of the April 2018

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refinancing of our prior senior secured credit facility, we had an aggregate of $75.5 million of remaining capacity and $43.9million of availability under our various credit facilities. Working capital requirements have increased as a result of our overall growth and the need to fund higher accounts receivable and inventory levels as our business volumes have increased. Based upon current and anticipated levels of operations, we believe that cash on hand, available credit facilities and cash flow from operations will be adequate to fund our working capital and capital expenditure requirements and to make required payments of principal and interest on our indebtedness over the next twelve months.

We anticipate that any new facilities and future facility expansions will be funded through cash flows from operations, the incurrence of other indebtedness and other potential sources of liquidity.

At September 30, 2018 and December 31, 2017, we had unrestricted cash, cash equivalents and short-term investments totaling $110.8 million and $148.1 million, respectively. The September 30, 2018 balance includes $40.2 million of cash located outside of the U.S., including $29.6 million in China, $8.6 million in Turkey and $2.0 million in Mexico. Our ability to repatriate funds from China to the U.S. is subject to a number of restrictions imposed by the Chinese government. We repatriate funds through several technology license and corporate/administrative service agreements. We are compensated quarterly based on agreed upon royalty rates for such technology licenses and quarterly fees for corporate/administrative services. Certain of our subsidiaries are limited in their ability to declare dividends without first meeting statutory restrictions of the People’s Republic of China, including retained earnings as determined under Chinese-statutory accounting requirements. Until 50% ($11.6 million as of December 31, 2017) of registered capital is contributed to a surplus reserve, our Chinese operations can only pay dividends equal to 90% of after-tax profits (10% must be contributed to the surplus reserve). Once the surplus reserve fund requirement is met, our Chinese operations can pay dividends equal to 100% of after-tax profit assuming other conditions are met. At December 31, 2017, the amount of the surplus reserve fund was $5.6 million.

Operating Cash Flows

	Nine Months Ended
	September 30,
	2018			2017
	(in thousands)
Net income	$	14,127		$	36,527
Depreciation and amortization		19,080			14,143
Share-based compensation expense		6,971			4,794
Loss on extinguishment of debt		3,397			—
Deferred income taxes		(10,898	)		(2,613	)
Other non-cash items		284			430
Changes in assets and liabilities		(15,766	)		(9,821	)
Net cash provided by operating activities	$	17,195		$	43,460

Net cash provided by operating activities totaled $17.2 million for the nine months ended September 30, 2018 and was primarily the result of $19.1 million of depreciation and amortization, $14.1 million of net income, $7.0 million of share-based compensation expense and a $3.4 million loss on the extinguishment of debt, partially offset by a net increase of $15.8 million in working capital and a $10.9 million increase in deferred income taxes. The key components of the net increase in working capital include a $13.5 million increase in contract assets and liabilities, a $4.5 million increase in other noncurrent assets, a $3.5 million increase in inventories, and a $2.5 million decrease in other noncurrent liabilities. These increases were partially offset by a $2.3 million increase in accrued warranty, a $2.1 million decrease in accounts receivable, a $2.0 million increase in accounts payable and accrued expenses and a $1.9 million decrease in prepaid expenses and other current assets. The working capital changes in contract assets and liabilities, accounts receivable, accounts payable and accrued expenses and accrued warranty are primarily the result of the timing of production in the period.

Net cash provided by operating activities totaled $43.5 million for the nine months ended September 30, 2017 and was primarily the result of $36.5 million of net income, $14.1 million of depreciation and amortization and $4.8 million of share-based compensation costs, partially offset by a net increase of $9.8 million in working capital and a $2.6 million increase in deferred income taxes. The key components of the net increase in working capital include a $66.4 million increase in accounts receivable and a $7.6 million increase in other noncurrent assets. These increases were partially offset by a $48.1 million increase in accounts payable and accrued expenses, a $8.1 million increase in accrued warranty and a $7.6 million decrease in contract assets and liabilities. The working capital changes in contract assets and liabilities, accounts receivable, accounts payable and accrued expenses and accrued warranty are primarily the result of the timing of production in the period.

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Investing Cash Flows

	Nine Months Ended
	September 30,
	2018			2017
	(in thousands)
Purchase of property and equipment	$	(50,636	)	$	(35,312	)
Net cash used in investing activities	$	(50,636	)	$	(35,312	)

Net cash used in investing activities totaled $50.6 million and $35.3 million for the nine months ended September 30, 2018 and 2017, respectively, driven primarily by capital expenditures for new facilities and expansion or improvements at existing facilities and costs to enhance our information technology systems. The capital expenditures for the nine months ended September 30, 2018 primarily related to the our new wind blade plant in Matamoros, Mexico, the expansion and improvements at our Taicang, China facility, our second wind blade plant in Turkey, our second facility in Newton, Iowa and costs to enhance our information technology systems. The capital expenditures for the nine months ended September 30, 2017 primarily related to our second and third wind blade plants in Mexico and our second wind blade plant in Turkey.

We anticipate fiscal year 2018 capital expenditures of between $85 million to $90 million. We estimate that the cost we will incur after September 30, 2018 to complete our current projects in process is approximately $10 million. We have used and will continue to use cash flows from operations, the proceeds received from our credit facilities and the issuance of our common stock for major projects currently being undertaken. These include new manufacturing facilities in Matamoros, Mexico; Newton, Iowa and Yangzhou, China; continued investment in our existing China, Mexico and Turkey wind blade facilities and costs to enhance our information technology systems.

Financing Cash Flows

	Nine Months Ended
	September 30,
	2018			2017
	(in thousands)
Proceeds from revolving loans		89,435			—
Repayments of term and revolving loans		(74,972	)		(2,812	)
Net proceeds from (repayments of) accounts receivable financing		(3,915	)		8,196
Proceeds from working capital loans		—			6,620
Repayments of working capital loans		—			(11,258	)
Net proceeds from (repayments of) other debt		(14,174	)		4,556
Debt issuance costs		(281	)		—
Proceeds from exercise of stock options		2,211			988
Repurchase of common stock including shares    withheld in lieu of income taxes		(2,859	)		(1,264	)
Net cash provided by (used in) financing activities	$	(4,555	)	$	5,026

The net cash used in financing activities totaled $4.6 million for the nine months ended September 30, 2018 compared to $5.0 million of net cash provided by financing activities in the comparable period of 2017. Net cash used in financing activities for the nine months ended September 30, 2018 primarily reflects the repayments of term and revolving loans, the net repayments of accounts receivable financing and other growth-related debt and the repurchase of common stock, mostly offset by the proceeds from revolving loans as well as the proceeds from the exercise of stock options.  Net cash provided by financing activities for the nine months ended September 30, 2017 primarily reflects the net proceeds from accounts receivable financing, the proceeds from working capital loans and the net proceeds from other growth-related debt, partially offset by repayments of working capital loans and term loans.

Share Repurchases

During the nine months ended September 30, 2018, we repurchased 100,891 shares of our common stock for $2.9 million related to tax withholding requirements on restricted stock units which vested during the period.  

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Description of Our Indebtedness

Senior Financing Agreements (U.S.):

In December 2016, we amended and restated the previous credit facility (the Restated Credit Facility). The previous $100.0 million of available principal was replaced with a $75.0 million term loan and a $25.0 million revolving credit facility, which originally included a $15.0 million letter of credit sub-facility, which was increased to $20.0 million in April 2017. The borrowings under the Restated Credit Facility bore interest at a variable rate through maturity at the London Interbank Offered Rate (LIBOR), with a 1.0% floor, plus 5.75%. The Restated Credit Facility required us to make quarterly principal payments in the amount of $0.9 million of the outstanding principal loan balance commencing in March 2017, with the remaining outstanding balance to be repaid on or before December 30, 2020. The Restated Credit Facility contained customary affirmative covenants, negative covenants and events of default. The obligations under the Restated Credit Facility were secured by a lien on substantially all of our tangible and intangible property and by a pledge of 65% of the equity of our direct foreign subsidiaries, subject to customary exceptions and exclusions from collateral.

If we prepaid any of the outstanding principal loan balance prior to December 30, 2017, we would have been required to pay the lenders a premium equal to the amount of interest that otherwise would have been payable from the date of prepayment until December 30, 2017 plus 3.0% of the amount of the principal loan balance that was prepaid. If we prepaid any of the outstanding principal loan balance after December 30, 2017 through December 30, 2018, we would have been required to pay the lenders 2.0% of the principal loan balance that was prepaid, and if we were to have prepaid any of the outstanding loan balance after December 30, 2018 through December 30, 2019, we would have been required to pay a premium of 1.5% of the amount of the principal loan balance that was prepaid.

In connection with the Restated Credit Facility, in December 2016, we repaid the previous credit facility balance of $74.4 million, plus accrued interest, closing fees, a prepayment penalty and the reimbursement of certain lenders expenses incurred. In addition, we incurred debt issuance costs related to the Restated Credit Facility totaling $2.2 million which were being amortized to interest expense over the remaining term of the credit facility (48 months) using the effective interest method.

In December 2017, we amended the Restated Credit Facility to consent to the restructuring of our parent and subsidiaries, decreased the variable interest rate to LIBOR, with a 1.0% floor, plus 5.25% and the amendment of certain capital expenditure and other financial covenants.  In connection with this amendment, the amendment fee of $0.4 million was recorded as a debt issuance cost and was being amortized to interest expense over the remaining term of the credit facility (36 months) using the effective interest method. As of December 31, 2017, the aggregate outstanding balance under the Restated Credit Facility was $74.1 million.

In April 2018, we entered into a new credit agreement (the Credit Agreement) with four lenders consisting of a multi-currency, revolving credit facility in an aggregate principal amount of $150.0 million, including a $25.0 million letter of credit sub-facility. On the closing date we drew down $75.4 million on the revolving credit facility in connection with the closing of the transactions contemplated by the Credit Agreement and used the proceeds to pay all outstanding amounts due and payable under the Restated Credit Facility, various fees and expenses and accrued interest. All borrowings and amounts outstanding under the Credit Agreement are scheduled to mature in April 2023.

In connection with the Credit Agreement, we expensed $2.0 million of deferred financing costs associated with the Restated Credit Facility and a $1.4 million prepayment penalty within the caption “Loss on extinguishment of debt” in the accompanying condensed consolidated statements of operations. In addition, we incurred debt issuance costs related to the Credit Agreement totaling $1.0 million which will be amortized to interest expense over the five-year term of the Credit Agreement using the effective interest method.

Interest accrues at a variable rate equal to LIBOR plus an initial margin of 1.5% (3.7% as of September 30, 2018), which may vary based on our total net leverage ratio as defined in the Credit Agreement. Interest is paid monthly and we are not obligated to make any principal repayments prior to the maturity date as long as we are not in default under the Credit Agreement. We may prepay borrowing under the Credit Agreement without penalty.

In April 2018, we also entered into an interest rate swap arrangement to fix a notional amount of $75.0 million of the Credit Agreement at an effective interest rate of 4.19% for a period of five years.  

In August 2018, we borrowed an additional $15.0 million under the Credit Agreement in order to provide an intercompany loan to one of our EMEA subsidiaries. See Note 1, Summary of Operations and Significant Accounting Issues – Financial Instruments to our condensed consolidated financial statements. As of September 30, 2018, there was $90.4 million outstanding under the Credit Agreement. In October 2018, the intercompany loan was repaid.

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Accounts Receivable, Secured and Unsecured Financing:

EMEA: During 2014, we renewed a general credit agreement, as amended, with a financial institution in Turkey to provide up to 21.0 million Euro, or approximately $24.4 million as of September 30, 2018, of short-term collateralized financing on invoiced accounts receivable of one of our customers in Turkey. Interest accrues annually at a fixed rate of 9.1% as of September 30, 2018 and is paid quarterly. In December 2014, and later amended, we obtained an additional $5.0 million of unsecured financing in Turkey under the credit agreement, increasing the total facility. All credit agreement terms remained the same. The credit agreement does not have a maturity date, however the limits are reviewed in September of each year. As of September 30, 2018 there were no amounts outstanding under either the accounts receivable or unsecured financing facilities.  As of December 31, 2017 there was $6.8 million of accounts receivable financing and no unsecured financing outstanding. During the fourth quarter of 2018, we replaced the accounts receivable financing facility with the accounts receivable assignment agreement discussed below.

In December 2014, we entered into a credit agreement with a Turkish financial institution to provide up to $16.0 million of short-term financing of which $10.0 million is collateralized financing on invoiced accounts receivable of one of our customers in Turkey, $5.0 million is unsecured financing and $1.0 million is related to letters of guarantee. Interest accrues at a variable rate of the three month Euro Interbank Offered Rate (EURIBOR) plus 6.5%. During the first quarter of 2018, the collateralized financing on invoiced accounts receivables and unsecured financing facilities were retired and the letters of guarantee limit was decreased to $0.6 million. No amounts were outstanding under this agreement as of September 30, 2018 or December 31, 2017.

In March 2016, we entered into a general credit agreement, as amended, with a Turkish financial institution to provide up to 31.0 million Euro (approximately $36.0 million as of September 30, 2018) of short-term financing of which 15.0 million Euro (approximately $17.4 million as of September 30, 2018) is collateralized financing based on invoiced accounts receivables of two of the EMEA segment’s customers, 15.0 million Euro (approximately $17.4 million as of September 30, 2018) for the collateralized financing of capital expenditures and 1.0 million Euro (approximately $1.2 million as of September 30, 2018) related to letters of guarantee. Interest on the collateralized financing based on invoiced accounts receivables of two of its customers accrues at a fixed rate of 10.0% as of September 30, 2018 and is paid quarterly with a maturity date equal to four months from the applicable invoice date. Interest on the collateralized capital expenditures financing accrues at the one month EURIBOR, plus 6.75% (6.75% as of September 30, 2018) with monthly principal repayments beginning in October 2017 with a final maturity date of December 2021. Interest on the letters of guarantee accrues at 2.00% annually, with an amended final maturity date of December 2018. As of September 30, 2018 and December 31, 2017, there was $13.4 million and $16.9 million outstanding under the collateralized financing of capital expenditures line, respectively. Additionally, as of September 30, 2018 and December 31, 2017, there was $10.2 million and $7.3 million outstanding under the collateralized financing based on invoiced accounts receivables, respectively.

Asia: In February 2017, we entered into a credit agreement with a Chinese financial institution to provide an unsecured credit line of up to 210.0 million Renminbi (approximately $30.5 million as of September 30, 2018) which can be used for the purpose of domestic and foreign currency loans, issuing customs letters of guarantee or other transactions approved by the lender.  Interest on the credit line accrues at the LIBOR rate plus an applicable margin and can be paid monthly, quarterly or at the time of the debt’s maturity (extended to January 2019). As of September 30, 2018 and December 31, 2017, there were 42.2 million Renminbi (approximately $6.1 million as of September 30, 2018) and 127.0 million Renminbi (approximately $19.5 million as of December 31, 2017) of letters of guarantee used for customs clearance outstanding, respectively.  

In March 2018, we entered into a credit agreement with a Chinese financial institution to provide an unsecured credit line of up to 100.0 million Renminbi (approximately $14.5 million as of September 30, 2018) of which 70.0 million Renminbi (approximately $10.2 million as of September 30, 2018) can be used as customs letters of guarantee and 30.0 million Renminbi (approximately $4.3 million as of September 30, 2018 can be used for working capital. Interest on the credit line accrues at the LIBOR rate plus an applicable margin and can be paid monthly, quarterly or at the time of the debt’s maturity (in March 2023). As of September 30, 2018, there were no amounts outstanding under this credit agreement.  

Equipment Leases and Other Arrangements: We have entered into certain capital lease, sale-leaseback and equipment financing arrangements in the U.S., Mexico and EMEA for equipment used in our operations as well as for office use. These leases bear interest at rates ranging from 3.0% to 9.0% annually, and principal and interest are payable monthly. As of September 30, 2018 and December 31, 2017, there was an aggregate total of $19.7 million and $18.5 million outstanding under these arrangements, respectively.

Operating Leases: We lease various facilities and equipment under non-cancelable operating lease agreements. As of September 30, 2018, we leased a total of approximately 5.3 million square feet in Dafeng, China; Taicang City, China; Yangzhou, China; Izmir, Turkey; Kolding, Denmark; Newton, Iowa; Juárez, Mexico; Matamoros, Mexico; Santa Teresa, New Mexico; Warren, Rhode Island; Fall River, Massachusetts, as well as our corporate office in Scottsdale, Arizona. The terms of these leases range from 12 months to 120 months with annual payments approximating $23 million for the full year 2018.

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Off-Balance Sheet Transactions

We are not presently involved in any off-balance sheet arrangements, including transactions with unconsolidated special-purpose or other entities that would materially affect our financial position, results of operations, liquidity or capital resources, other than our operating lease arrangements and the accounts receivable assignment agreement described below. Furthermore, we do not have any relationships with special-purpose or other entities that provide off-balance sheet financing; liquidity, market risk or credit risk support; or engage in leasing or other services that may expose us to liability or risks of loss that are not reflected in consolidated financial statements and related notes.

In 2014, our Mexico segment entered into an accounts receivable assignment agreement with a financial institution. Under this agreement, the financial institution buys, on a non-recourse basis, the accounts receivable amounts related to one of our Mexico segment’s customers at a discount calculated based on LIBOR plus 2.75%. As these receivables are purchased by the financial institution, they are removed from the Mexico segment’s balance sheet. For the three and nine months ended September 30, 2018, $35.0 million and $69.4 million of receivables were sold to the financial institution, respectively.

In September 2018, our U.S. and Mexico segments entered into an accounts receivable assignment agreement with a financial institution. Under this agreement, the financial institution buys, on a non-recourse basis, the accounts receivable amounts related to one of our Iowa and Mexico segment’s customers at a discount calculated based on LIBOR plus 0.55%. As these receivables are purchased by the financial institution, they are removed from the Iowa and Mexico segment’s balance sheets.  During the three months ended September 30, 2018, $27.0 million of receivables were sold to the financial institution.

In the fourth quarter of 2018, our EMEA segment entered into an accounts receivable assignment agreement with a financial institution. Under this agreement, the financial institution may buy, on a non-recourse basis, up to 15.0 million Euro (approximately $17.4 million as of September 30, 2018) of the accounts receivable amounts related to one of our EMEA segment’s customers at a discount calculated based on EURIBOR plus 2.65%.  As these receivables are purchased by the financial institution, they will be removed from the EMEA segment’s balance sheet. 

Critical Accounting Policies and Estimates

Effective January 1, 2018, we adopted the requirements of Topic 606 using the full retrospective method as further described in Note 1, Recently Issued Accounting Pronouncements - Revenue from Contracts with Customers and Note 2, Revenue from Contracts with Customers to our condensed consolidated financial statements. We believe that the resulting accounting policy related to revenue recognition is a critical accounting policy because of the significance of revenue, the complexity of estimates when utilizing the percentage-of-completion method and the significant degree of judgment in evaluating recognition criteria.

Except as noted above, there have been no other significant changes to our critical accounting policies as disclosed in our Annual Report on Form 10-K.

Recent Accounting Pronouncements

For a discussion of recent accounting pronouncements, see Note 1, Recently Issued Accounting Pronouncements to our condensed consolidated financial statements.

Contractual Obligations

During the nine months ended September 30, 2018, there have been no material changes to the contractual obligations reported in our Annual Report on Form 10-K, other than in the ordinary course of business.

Item 3. Quantitative and Qualitative Disclosures about Market Risk

We are exposed to market risk in the ordinary course of our business. These market risks are principally limited to changes in foreign currency exchange rates and commodity prices. We currently do not hedge our exposure to these risks.

Foreign Currency Risk. We conduct international operations in China, Mexico and Turkey. Our results of operations are subject to both currency transaction risk and currency translation risk. We incur currency transaction risk whenever we enter into either a purchase or sale transaction using a currency other than the local currency of the transacting entity. With respect to currency translation risk, our financial condition and results of operations are measured and recorded in the relevant domestic currency and then translated into U.S. dollars for inclusion in our consolidated financial statements. In recent years, exchange rates between these foreign currencies and the U.S. dollar have fluctuated significantly and may do so in the future. A hypothetical change of 10% in the exchange

43

rates for the countries above would have resulted in a change to income from operations of approximately $5.0 million and $6.0 million for the nine months ended September 30, 2018 and 2017, respectively.

Commodity Price Risk. We are subject to commodity price risk under agreements for the supply of our raw materials. We have not hedged, nor do we intend to hedge, our commodity price exposure. We generally lock in pricing for our key raw materials for 12 months which protects us from price increases within that period. As many of our raw material supply agreements have meet or release clauses, if raw materials prices go down, we are able to benefit from the reductions in price. We believe that this adequately protects us from increases in raw material prices and also enables us to take full advantage of decreases.

Resin and resin systems are the only commodities for which we do not have fixed pricing. Approximately 30% of the resin and resin systems we use is purchased under contracts controlled by two of our customers and therefore they receive/bear 100% of any increase or decrease in resin costs further limiting our exposure to price fluctuations. We believe that a 10% change in the price of resin and resin systems for the customers in which we are exposed to fluctuating prices would have had an impact to income from operations of approximately $5.5 million and $9.9 million for the nine months ended September 30, 2018 and 2017, respectively. Furthermore, this amount does not include the portion of any increase or decrease that would be shared with our customers under our long-term supply agreements, which is generally 70%.

Interest Rate Risk. As of September 30, 2018, our EMEA segment has one general credit agreement with a Turkish financial institution outstanding which is tied to EURIBOR. This agreement contains collateralized financing of capital expenditures. As of September 30, 2018, there was $13.4 million of collateralized financing of capital expenditures outstanding. In addition, as of September 30, 2018, our Credit Agreement includes interest on the unhedged principal amount of $15.4 million which is tied to LIBOR. The one EMEA general credit agreement and our Credit Agreement noted above are the only variable rate debt that we had outstanding as of September 30, 2018 as all remaining working capital loans, accounts receivable financing and capital lease obligations are fixed rate instruments and are not subject to fluctuations in interest rates. Due to the relatively low LIBOR and EURIBOR rates in effect as of September 30, 2018, a 10% change in the LIBOR or EURIBOR rate would not have had a material impact on our future earnings, fair values or cash flows.

Item 4. Controls and Procedures

Evaluation of Disclosure Controls and Procedures

We maintain disclosure controls and procedures that are designed to provide reasonable assurance that information required to be disclosed in our reports under the Exchange Act is recorded, processed, summarized, and reported within the time period specified in the SEC’s rules and forms and 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 required by Rule 13a-15(b) promulgated under the Exchange Act, our management, with the participation of our Chief Executive Officer and Chief Financial Officer, evaluated the design and operating effectiveness as of September 30, 2018 of our disclosure controls and procedures, as defined in Rule 13a-15(e) promulgated under the Exchange Act. Based on this evaluation, our Chief Executive Officer and Chief Financial Officer concluded that our disclosure controls and procedures were effective as of September 30, 2018.

Changes in Internal Control Over Financial Reporting

As a result of the adoption of Topic 606, we have re-evaluated and established new internal controls related to revenue recognition. We are also currently updating our enterprise risk planning systems to accommodate Topic 606 and will continue to evaluate such internal controls.  

Except as noted above, there have not been any other changes in our internal control over financial reporting during the three months ended September 30, 2018, that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

44

PART II—OTHER INFORMATION

Item 1. Legal Proceedings

From time to time, we may be involved in disputes or litigation relating to claims arising out of our operations.

In March 2015, a complaint was filed against us in the Superior Court of the State of Arizona (Maricopa County) by a former employee, alleging that we had agreed to make certain cash payments to such employee upon any future sale of the Company. We filed a motion to dismiss the complaint in April 2015, which was denied. We subsequently filed an answer to the complaint in July 2015 denying the substantive allegations of the complaint. The parties completed court-ordered mediation in December 2015 but were not able to reach a settlement. We filed a motion for summary judgment to dismiss the complaint in April 2016 and the court denied the motion in August 2016. The court recently postponed the trial date from August 2018 until June 2019. We continue to deny the substantive allegations of the complaint and intend to vigorously defend this lawsuit; however, we are currently unable to determine the ultimate outcome of this case.

In August 2015, we entered into a transition agreement with our former Senior Vice President – Asia, pursuant to which that individual transitioned out of this role at the end of 2015 and was to serve in a consulting capacity in 2016 and 2017. In January 2016, following our discovery that the individual had materially violated the terms of the transition agreement, we terminated the consultancy for cause. In April 2016, an arbitration claim was filed in China by the individual with the Taicang Labor and Personnel Dispute Arbitration Committee alleging that we improperly terminated the transition agreement. The individual is demanding that we honor the terms of the transition agreement and pay compensation and fees under the transition agreement, which in the aggregate totals approximately $2.6 million. In addition, the individual is also challenging the validity of our termination of an option to purchase 164,880 shares of our common stock and 77,760 restricted stock units awarded under the 2015 Plan, which were canceled in January 2016 when the consultancy was terminated. The Taicang Labor and Personnel Dispute Arbitration Committee awarded damages to the individual of approximately $1.2 million but rejected the claims regarding the termination of the stock option and restricted stock unit awards. We subsequently appealed the arbitration award in favor of the individual to the Taicang Municipal People’s Court, which affirmed the arbitration award in June 2018. We have appealed this judgment to an appellate level court in the Jiangsu Province and the appeal remains pending. We previously established a reserve for these matters and do not believe the award, if upheld on appeal, will have a material impact on our operating results or financial condition.

In June 2018, Iowa OSHA, a division of the Iowa Department of Labor, issued a citation and notification of penalty to us alleging that certain of our workplace practices and conditions at our Newton, Iowa wind blade manufacturing facility had violated the Iowa Occupational Safety and Health Act. Specifically, the citation cited us for multiple alleged violations and proposed that we pay an aggregate penalty of $0.2 million. In June 2018, we notified Iowa OSHA that we were contesting all of the alleged violations and proposed penalties. In June 2018, the Labor Commissioner of the Iowa Department of Labor subsequently filed a complaint with the State of Iowa Employment Appeal Board, petitioning the appeal board to affirm the citation and notification of penalty that Iowa OSHA issued to us. In July 2018, we then filed a response with the appeal board denying the substantive allegations of the complaint. A hearing date has been set for June 2019 and the matter remains pending.

From time to time, we are party to various lawsuits, claims, and other legal proceedings that arise in the ordinary course of business, some of which are covered by insurance. Upon resolution of any pending legal matters, we may incur charges in excess of presently established reserves. Our management does not believe that any such charges would, individually or in the aggregate, have a material adverse effect on our financial condition, results of operations or cash flows.  

Item 1A. Risk Factors

There have been no material changes to the Risk Factors (Part I, Item 1A) in our Annual Report on Form 10-K, which could materially affect our business, financial condition, and/or future results.  

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

Issuer Purchases of Equity Securities

The following table summarizes the total number of shares of our common stock that we repurchased during the three months ended September 30, 2018 from certain employees who surrendered common stock to pay the taxes in connection with the vesting of restricted stock units.

45

Period	Total Number of Shares Purchased		Average Price Paid per Share		Total Number of Shares Purchased as Part of Publicly Announced Program		Maximum Number of Shares That May Yet Be Purchased Under the Program
July (July 1, 2018 - July 31, 2018)		73,212	$	29.71		—		—
August (August 1, 2018 - August 31, 2018)		14,382		28.80		—		—
September (September 1, 2018 - September 30, 2018)		—		—		—		—
Total		87,594	$	29.56		—		—

Use of Proceeds

On July 21, 2016, our Registration Statement on Form S-1 (File No. 333-212093) was declared effective by the SEC for our IPO whereby we registered an aggregate of 7,187,500 shares of our common stock, including 937,500 shares of our common stock registered for sale by us upon the full exercise of the underwriters’ option to purchase additional shares. On July 27, 2016, we completed our IPO and sold 7,187,500 shares of our common stock at a price to the public of $11.00 per share. J.P. Morgan Securities LLC and Morgan Stanley & Co. LLC acted as the managing underwriters. The total gross proceeds from the offering to us were $79.1 million. After deducting underwriting discounts and commissions of $4.6 million and offering expenses of $7.3 million, we received $67.2 million in net proceeds. There has been no material change in the planned use of proceeds from our IPO as described in our final prospectus filed with the SEC on July 22, 2016 pursuant to Rule 424(b) of the Securities Act. We continue to invest the remaining funds received in registered money market funds.

Item 3. Defaults Upon Senior Securities

Not applicable.

Item 4. Mine Safety Disclosures

Not applicable.

Item 5. Other Information

None.

46

Item 6. Exhibits

Exhibit Number	Exhibit Description
31.1	Certification of Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
31.2	Certification of Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
32.1*	Certification of Chief Executive Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
32.2*	Certification of Chief Financial Officer 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

* The certifications furnished in Exhibits 32.1 and 32.2 hereto are deemed to accompany this Quarterly Report on Form 10-Q and will not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, except to the extent that the Registrant specifically incorporates it by reference.

47

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

TPI COMPOSITES, INC.

Date: November 7, 2018	By:	/s/ William E. Siwek
		William E. Siwek
		Chief Financial Officer
		(Principal Financial and Accounting Officer)

48

EX-31.1

Exhibit 31.1

CERTIFICATION

I, Steven C. Lockard, certify that:

1. I have reviewed this quarterly report on Form 10-Q of TPI Composites, 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)) 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.

Date: November 7, 2018	By:	/s/ Steven C. Lockard
		Steven C. Lockard
		President and Chief Executive Officer
		(Principal Executive Officer)

EX-31.2

Exhibit 31.2

CERTIFICATION

I, William E. Siwek, certify that:

1. I have reviewed this quarterly report on Form 10-Q of TPI Composites, 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)) 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.

Date: November 7, 2018	By:	/s/ William E. Siwek
		William E. Siwek
		Chief Financial Officer
		(Principal Financial and Accounting 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

I, Steven C. Lockard, Chief Executive Officer of TPI Composites, Inc., certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

1. the report on Form 10-Q of TPI Composites, Inc. for the three months ended September 30, 2018 (the “Report”) fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 (15 U.S.C. Section 78m or 78o(d)); and

2. the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of TPI Composites, Inc.

Date: November 7, 2018	By:	/s/ Steven C. Lockard
		Steven C. Lockard
		President and Chief Executive Officer
		(Principal 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

I, William E. Siwek, Chief Financial Officer of TPI Composites, Inc., certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

1. the report on Form 10-Q of TPI Composites, Inc. for the three months ended September 30, 2018 (the “Report”) fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 (15 U.S.C. Section 78m or 78o(d)); and

2. the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of TPI Composites, Inc.

Date: November 7, 2018	By:	/s/ William E. Siwek
		William E. Siwek
		Chief Financial Officer
		(Principal Financial and Accounting Officer)

XML

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2018	Oct. 31, 2018
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q3
Trading Symbol	TPIC
Entity Registrant Name	TPI COMPOSITES, INC
Entity Central Index Key	0001455684
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	true
Entity Ex Transition Period	true
Entity Common Stock, Shares Outstanding		34,510,890

XML

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 110,838	$ 148,113
Restricted cash	2,845	3,849
Accounts receivable	117,066	121,576
Contract assets	122,265	105,619
Prepaid expenses and other current assets	25,036	27,507
Inventories	7,445	4,112
Total current assets	385,495	410,776
Property, plant, and equipment, net	150,931	123,480
Other noncurrent assets	38,270	22,306
Total assets	574,696	556,562
Current liabilities:
Accounts payable and accrued expenses	168,039	167,175
Accrued warranty	32,704	30,419
Current maturities of long-term debt	39,201	35,506
Contract liabilities	8,335	2,763
Total current liabilities	248,279	235,863
Long-term debt, net of debt issuance costs and current maturities	93,583	85,879
Other noncurrent liabilities	4,284	4,938
Total liabilities	346,146	326,680
Commitments and contingencies (Note 10)
Stockholders’ equity: (Note 4)
Common shares, $0.01 par value, 100,000 shares authorized and 34,629 shares issued and 34,511 shares outstanding at September 30, 2018 and 100,000 shares authorized and 34,049 shares issued and 34,021 shares outstanding at December 31, 2017	346	340
Paid-in capital	310,166	301,543
Accumulated other comprehensive loss	(21,977)	(558)
Accumulated deficit	(56,805)	(70,932)
Treasury stock, at cost, 118 shares at September 30, 2018 and 28 shares at December 31, 2017	(3,180)	(511)
Total stockholders’ equity	228,550	229,882
Total liabilities and stockholders’ equity	$ 574,696	$ 556,562

XML

Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Sep. 30, 2018	Dec. 31, 2017
Statement Of Financial Position [Abstract]
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	34,629,000	34,049,000
Common stock, shares outstanding	34,511,000	34,021,000
Treasury stock, shares	118,000	28,000

XML

Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Income Statement [Abstract]
Net sales (Note 4)	$ 254,976	$ 253,498	$ 739,567	$ 701,695
Cost of sales	216,594	210,840	625,817	592,495
Startup and transition costs	21,415	12,352	53,474	29,051
Total cost of goods sold	238,009	223,192	679,291	621,546
Gross profit	16,967	30,306	60,276	80,149
General and administrative expenses	9,756	9,315	31,908	28,373
Income from operations	7,211	20,991	28,368	51,776
Other income (expense):
Interest income	45	48	129	78
Interest expense	(2,323)	(3,254)	(8,376)	(9,215)
Loss on extinguishment of debt			(3,397)
Realized gain (loss) on foreign currency remeasurement	(8,181)	39	(12,957)	(2,575)
Miscellaneous income	2,511	390	4,003	968
Total other expense	(7,948)	(2,777)	(20,598)	(10,744)
Income (loss) before income taxes	(737)	18,214	7,770	41,032
Income tax benefit (provision)	10,269	3,523	6,357	(4,505)
Net income	$ 9,532	$ 21,737	$ 14,127	$ 36,527
Weighted-average common shares outstanding:
Basic	34,419	33,891	34,212	33,789
Diluted	36,282	35,015	35,946	34,748
Net income per common share:
Basic	$ 0.28	$ 0.64	$ 0.41	$ 1.08
Diluted	$ 0.26	$ 0.62	$ 0.39	$ 1.05

XML

Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 9,532	$ 21,737	$ 14,127	$ 36,527
Other comprehensive income (loss):
Foreign currency translation adjustments	(15,621)	1,231	(21,908)	2,808
Unrealized gain on hedging derivatives, net of taxes of $149 for the three and nine months ended September 30, 2018	297		489
Comprehensive income (loss)	$ (5,792)	$ 22,968	$ (7,292)	$ 39,335

XML

Condensed Consolidated Statements of Comprehensive Income (Loss) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2018
Statement Of Income And Comprehensive Income [Abstract]
Unrealized gain on hedging derivatives	$ 149	$ 149

XML

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash flows from operating activities:
Net income	$ 14,127	$ 36,527
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	19,080	14,143
Share-based compensation expense	6,971	4,794
Loss on extinguishment of debt	3,397
Amortization of debt issuance costs	284	430
Deferred income taxes	(10,898)	(2,613)
Changes in assets and liabilities:
Accounts receivable	2,052	(66,438)
Contract assets and liabilities	(13,466)	7,604
Inventories	(3,489)	(335)
Prepaid expenses and other current assets	1,941	881
Other noncurrent assets	(4,503)	(7,615)
Accounts payable and accrued expenses	1,958	48,083
Accrued warranty	2,285	8,135
Other noncurrent liabilities	(2,544)	(136)
Net cash provided by operating activities	17,195	43,460
Cash flows from investing activities:
Purchase of property and equipment	(50,636)	(35,312)
Net cash used in investing activities	(50,636)	(35,312)
Cash flows from financing activities:
Proceeds from revolving loans	89,435
Repayments of term and revolving loans	(74,972)	(2,812)
Net proceeds from (repayments of) accounts receivable financing	(3,915)	8,196
Proceeds from working capital loans		6,620
Repayments of working capital loans		(11,258)
Net proceeds from (repayments of) other debt	(14,174)	4,556
Debt issuance costs	(281)
Proceeds from exercise of stock options	2,211	988
Repurchase of common stock including shares withheld in lieu of income taxes	(2,859)	(1,264)
Net cash provided by (used in) financing activities	(4,555)	5,026
Impact of foreign exchange rates on cash, cash equivalents and restricted cash	(283)	305
Net change in cash, cash equivalents and restricted cash	(38,279)	13,479
Cash, cash equivalents and restricted cash, beginning of year	152,437	129,863
Cash, cash equivalents and restricted cash, end of period	114,158	143,342
Supplemental disclosures of cash flow information:
Cash paid for interest	8,546	8,717
Cash paid for income taxes, net	4,279	14,134
Supplemental disclosures of noncash investing and financing activities:
Accrued capital expenditures in accounts payable	4,340	3,689
Equipment acquired through capital lease and financing obligations	$ 11,930	$ 4,749

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Summary of Operations and Significant Accounting Policies

9 Months Ended

Sep. 30, 2018

Accounting Policies [Abstract]

Summary of Operations and Significant Accounting Policies

Note 1. Summary of Operations and Significant Accounting Policies

Description of Business

TPI Composites, Inc. is the holding company that conducts substantially all of its business operations through its direct and indirect subsidiaries (collectively, the Company). The Company was founded in 1968 and has been producing composite wind blades since 2001. The Company’s knowledge and experience of composite materials and manufacturing originates with its predecessor company, Tillotson Pearson Inc., a leading manufacturer of high-performance sail and powerboats along with a wide range of composite structures used in other industrial applications. Following the separation from the boat building business in 2004, the Company reorganized in Delaware as LCSI Holding, Inc. and then changed its corporate name to TPI Composites, Inc. in 2008. The Company is currently headquartered in Scottsdale, Arizona and has expanded its global footprint to include domestic facilities in Newton, Iowa; Fall River, Massachusetts; Warren, Rhode Island and Santa Teresa, New Mexico and international facilities in Dafeng, China; Taicang Port, China; Taicang City, China; Yangzhou, China; Juárez, Mexico; Matamoros, Mexico; Izmir, Turkey and Kolding, Denmark.

References to TPI Composites, Inc, the “Company,” “we,” “us” or “our” in these notes refer to TPI Composites, Inc. and its consolidated subsidiaries.

Public Offerings and Stock Split

In July 2016, we completed an initial public offering (IPO) of 7,187,500 shares of our common stock at a price of $11.00 per share, which included 937,500 shares issued pursuant to the underwriters’ over-allotment option. Certain of our existing shareholders, a non-employee director and executive officers purchased an aggregate of 1,250,000 shares of our common stock in the IPO included in the total issuance above. The net proceeds from the IPO were $67.2 million after deducting underwriting discounts and offering expenses. Immediately prior to the closing of the IPO, all shares of the then-outstanding redeemable preferred shares converted into an aggregate of 21,110,204 shares of our common stock and the redeemable preferred share warrants converted on a net issuance basis into 120,923 shares of our common stock. In addition, concurrent with the closing of the IPO, certain subordinated convertible promissory notes in the aggregate principal and interest amount of $11.9 million were converted into 1,079,749 shares of our common stock at the public offering price of $11.00 per share.

Prior to the IPO, in July 2016 we amended our amended and restated certificate of incorporation to effect a 360-for-1 forward stock split of our common stock. As a result of the stock split, we have adjusted the share amounts authorized and issuable under the share-based compensation plans. All share and per share common stock information (including the share-based compensation plans) referenced throughout the unaudited condensed consolidated financial statements and notes thereto have been retroactively adjusted to reflect this stock split. The stock split did not cause an adjustment to the par value of the authorized shares of our common stock.

In May 2017, we completed a secondary public offering of 5,075,000 shares of our common stock at a price of $16.35 per share, which included 575,000 shares issued pursuant to the underwriters’ option to purchase additional shares. All of the shares were sold by existing shareholders and certain of our executive officers. The selling shareholders received all of the net proceeds of $78.8 million from the secondary public offering. We did not sell any shares and did not receive any of the proceeds from the offering and the costs paid by us in connection with the offering of $0.8 million were recorded in general and administrative costs in the accompanying condensed consolidated statement of operations.  

Basis of Presentation

We divide our business operations into four geographic operating segments—the United States (U.S.), Asia, Mexico and Europe, the Middle East and Africa (EMEA) as follows:

• Our U.S. segment includes (1) the manufacturing of wind blades at our Newton, Iowa plant, (2) the manufacturing of precision molding and assembly systems used for the manufacture of wind blades at our Warren, Rhode Island facility, (3) the manufacturing of composite solutions for the transportation industry, which we also conduct at our existing Rhode Island facility as well as at our Fall River, Massachusetts facility and at a second manufacturing facility in Newton, Iowa which commenced operations in the second quarter of 2018, (4) wind blade inspection and repair services in North America, (5) our advanced engineering center in Kolding, Denmark, which provides technical and engineering resources to our manufacturing facilities and (6) our corporate headquarters, the costs of which are included in general and administrative expenses.

• Our Asia segment includes (1) the manufacturing of wind blades at our facility in Taicang Port, China and at our two facilities in Dafeng, China, (2) the manufacturing of precision molding and assembly systems at our Taicang City, China facility and (3) wind blade inspection and repair services.  In March 2018, we entered into a new lease agreement with a third party related to the lease of a new manufacturing facility in the Yangzhou Economic & Technical Development Zone in Yangzhou, China and we expect to commence operations at this facility in early 2019.

• Our Mexico segment manufactures wind blades from our three facilities in Juárez, Mexico, the most recent of which commenced operations in January 2017.  In April 2017, we entered into a new lease agreement with a third party for a new manufacturing facility in Matamoros, Mexico and we commenced operations at this facility in the third quarter of 2018. This segment also manufactures precision molding and assembly systems and performs wind blade inspection and repair services.

• Our EMEA segment manufactures wind blades from our two facilities in Izmir, Turkey and also performs wind blade inspection and repair services.

The accompanying condensed consolidated financial statements include the accounts of TPI Composites, Inc. and of our majority owned subsidiaries. All significant intercompany transactions and balances have been eliminated.

The condensed consolidated financial statements included herein have been prepared by us without audit, pursuant to the rules and regulations of the SEC and should be read in conjunction with the audited consolidated financial statements for the year ended December 31, 2017 included in our Annual Report on Form 10-K. Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States (GAAP) have been condensed or omitted, as permitted by the SEC, although we believe the disclosures that are made are adequate to make the information presented herein not misleading. The accompanying condensed consolidated financial statements reflect, in the opinion of our management, all normal recurring adjustments necessary to present fairly our financial position at September 30, 2018, and the results of our operations, comprehensive income and cash flows for the periods presented. We restated our December 31, 2017 condensed consolidated balance sheet and the September 30, 2017 condensed consolidated statement of operations and cash flow for the effect of the adoption of Accounting Standards Update (ASU) 2014-09, Revenue from Contracts with Customers, (Topic 606), see Note 13, Adjustments to Previously Reported Financial Statements from the Adoption of an Accounting Pronouncement. Interim results for the three and nine months ended September 30, 2018 and 2017 are not necessarily indicative of the results to be expected for the full years.

As previously announced, effective January 1, 2018, we adopted the requirements of Topic 606 using the full retrospective method as further described in Recently Issued Accounting Pronouncements - Revenue from Contracts with Customers and Note 2, Revenue from Contracts with Customers. All amounts and disclosures set forth in this Quarterly Report on Form 10-Q reflect the adoption of Topic 606 and differ from amounts previously reported for prior periods. See Note 13, Adjustments to Previously Reported Financial Statements from the Adoption of an Accounting Pronouncement, for further discussion of the adoption of Topic 606, including the impact on our previously reported financial statements.

Revenue Recognition

The majority of our revenue is generated from long-term contracts associated with manufacturing of wind blades and related services.  We account for a long-term contract when it has the approval from both parties, the rights of the parties are identified, payment terms are established, the contract has commercial substance and the collectability of consideration is probable.

To determine the proper revenue recognition method for each long-term contract, we evaluate whether the original contract should be accounted for as one or more performance obligations. This evaluation requires judgment and the decisions reached could change the amount of revenue and gross profit recorded in a given period. As most of our contracts contain multiple performance obligations, we allocate the total transaction price to each performance obligation based on the estimated relative standalone selling prices of the promised goods or services underlying each performance obligation. Our manufacturing services are customer specific and involve production of items that cannot be sold to other customers due to the customers’ protected intellectual property; therefore, we allocate the total transaction price under our contracts with multiple performance obligations using the contractually stated prices, as these prices represent the relative standalone selling price based on an expected cost plus margin model.  

Revenue is primarily recognized over time as we have an enforceable right to payment upon termination and we may not use or sell the product to fulfill other customers’ contracts.  In addition, the customer does not have return or refund rights for items produced that conform to the specifications included in the contract. Because control transfers over time, revenue is recognized based on the extent of progress towards the completion of the performance obligation. We use the cost-to-cost input measure of progress for our contracts as this method provides the best representation of the production progress towards satisfaction of the performance obligation as the materials are distinct to the product being manufactured because of customer specifications provided for in the contract, the costs incurred are proportional to the progress towards completion of the product, and the products do not involve significant pre-fabricated component parts. Under the cost-to-cost method, progress and the related revenue recognition is determined by a ratio of direct costs incurred to date in fulfillment of the contract to the total estimated direct costs required to complete the performance obligation.

Determining the revenue to be recognized for services performed under our manufacturing contracts involves significant judgments and estimates relating to the total consideration to be received and the expected total costs to complete the performance obligation.  The judgments and estimates relating to the total consideration to be received include the amount of variable consideration as our contracts typically provide the customer with a range of production output options from guaranteed minimum volume obligations to the production capacity of the facility, and customers will provide periodic non-cancellable commitments for the number of wind blades to be produced over the term of the agreement.  We use historical experience, customer commitments and forecasted future production based on the capacity of the plant to estimate the total revenue to be received to complete the performance obligation.  In addition, the amount of revenue per unit produced may vary based on the costs of production of the wind blades as we may be able to change the price per unit based on changes in the cost of production.  Further, some of our contracts provide opportunities for us to share in labor and material cost savings as well as absorb some additional costs as an incentive for more efficient production, both of which impact the margin realized on the contract and ultimately the total amount of revenue to be recognized.  Additionally, certain of our customer contracts provide for concessions by us for missed production deadlines.  

We estimate variable consideration at the most likely amount to which we expect to be entitled. We include estimated amounts in the 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. Our estimates of variable consideration and determination of whether to include estimated amounts in the transaction price are based largely on an assessment of our anticipated performance and all information available to us at the time of the estimate and may materially change as additional information becomes known.

Our contracts may be modified to account for changes in specifications of products and changing requirements. If the contract modifications are for goods or services that are not distinct from the existing contract, they are accounted for as if they were part of the original contract. The effect of a contract modification on the transaction price and the measure of progress for the performance obligation to which it relates is recognized as an adjustment to revenue on a cumulative catch-up basis. If contract modifications are for goods and services that are distinct from the existing contract and increases the amount of consideration reflecting the standalone sale price of the additional goods or services, then the contract modification is accounted for as a separate contract and is evaluated for one or more performance obligations.  

Each reporting period, we evaluate the progress towards satisfaction of each performance obligation based on any contract modifications that have occurred, cost incurred to date, and an estimate of the expected future revenue and costs to be incurred to complete the performance obligation. Based on this analysis, any changes in estimates of revenue, cost of sales, contract assets and liabilities and the related impact to operating income are recognized on a cumulative catch-up basis, which recognizes in the current period the cumulative effect of the changes on current and prior periods based on the percentage of completion of the performance obligation.

Wind blade pricing is based on annual commitments of volume as established in our customer’s contract and orders less than committed volume may result in a higher price per wind blade to our customers. Orders in excess of annual commitments may result in discounts to our customers from the contracted price for the committed volume. Our customers typically provide periodic purchase orders with the price per wind blade given the current cost of the bill of materials, labor requirements and volume desired.  We record an allowance for expected utilization of early payment discounts which are reported as a reduction of the related revenue.

Precision molding and assembly systems included in a customer’s contract are based upon the specific engineering requirements and design determined by the customer and are specific to the wind blade design and function desired. From the customer’s engineering specifications, a job cost estimate is developed along with a production plan, and the desired margin is applied based on the location the work is to be performed and complexity of the customer’s design. Precision molding and assembly systems are generally built to produce wind blades which may be manufactured by us in production runs specified in the customer contract.

Contract assets primarily relate to our rights to consideration for work completed but not billed at the reporting date on manufacturing services contracts.  The contract assets are transferred to accounts receivable when the rights become unconditional, which generally occurs when customers are invoiced upon the determination that a product conforms to the contract specifications and invoices are due based on each customers negotiated payment terms, which range from 15 to 65 days.  We apply the practical expedient that allows us to exclude payment terms under one year from the transfer of a promised good or service from consideration of a significant financing component in its contracts. With regards to the production of precision molding and assembly systems, our contracts generally call for progress payments to be made in advance of production. Generally, payment is made at certain percentage of completion milestones with the final payment due upon delivery to the manufacturing facility. These progress payments are recorded within contract liabilities as current liabilities in the condensed consolidated balance sheets and are reduced as we record revenue over time.  

Our customers may request, in situations where they do not have space available to receive products or do not want to take possession of products immediately for other reasons, that their finished products be stored by us in one of our facilities. Most of our contracts provide for a limited number of wind blades to be stored during the period of the contract with any additional wind blades stored subject to additional storage fees, which are included in the wind blade performance obligation revenue.  

Revenue related to non-recurring engineering and freight services provided under our customer contracts is recognized at a point in time following the transfer of control of the promised services to the customer. Customers usually pay the carrier directly for the cost of shipping associated with items produced.  When we pay the shipping costs, we apply the practical expedient that allows us to account for shipping and handling as a fulfillment costs and include the revenue in the associated performance obligation and the costs are included in cost of goods sold.

Taxes assessed by a governmental authority that are both imposed on and concurrent with specific revenue-producing transactions, that are collected by us from a customer, are excluded from revenue.

Warranty Expense

We provide a limited warranty for our mold and wind blade products, including parts and labor, with terms and conditions that vary depending on the product sold, generally for periods that range from two to five years. Warranty expense is recorded based upon estimates of future repairs using a probability-based methodology that considers previous warranty claims, identified quality issues and industry practices. Once the warranty period has expired, any remaining unused warranty accrual for the specific products is reversed against the current year warranty expense amount.

Warranty accrual at September 30 consisted of the following:

	2018
	(in thousands)
Warranty accrual at beginning of year	$	30,419
Accrual during the period		8,200
Cost of warranty services provided during the period		(3,153	)
Reversal of reserves upon warranty expiration		(2,762	)
Warranty accrual at end of period	$	32,704

Treasury Stock

Common stock purchased for treasury is recorded at historical cost. Transactions in treasury shares relate to share-based compensation plans and are recorded at weighted-average cost.

Net Income Per Common Share Calculation

The basic net income per common share is computed by dividing the net income by the weighted-average number of common shares outstanding during a period. Diluted net income per common share is computed by dividing the net income by the weighted-average number of common shares outstanding plus potentially dilutive securities using the treasury stock method. The table below reflects the calculation of the weighted-average number of common shares outstanding, using the treasury stock method, used in computing basic and diluted earnings per common share:

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2018		2017		2018		2017
	(in thousands)
Basic weighted-average shares outstanding		34,419		33,891		34,212		33,789
Effect of dilutive awards		1,863		1,124		1,734		959
Diluted weighted-average shares outstanding		36,282		35,015		35,946		34,748

Share-based compensation awards of 7,000 shares and 63,000 shares were excluded from the computation of diluted net income per share for the three and nine months ended September 30, 2018, respectively, because their effect would be anti-dilutive. We did not have any potential dilutive securities which were excluded from the computation of diluted net income per share for the three and nine months ended September 30, 2017.

Financial Instruments

Interest Rate Swap

We use interest rate swap contracts to mitigate our exposure to interest rate fluctuations associated with our new credit agreement (the Credit Agreement) that we entered into in April 2018. We do not use such swap contracts for speculative or trading purposes.

To offset the variability of future interest payments on the Credit Agreement arising from changes in the London Interbank Offered Rate (LIBOR), in April 2018, we entered into an interest rate swap agreement with a financial institution for a notional amount of $75.0 million with an expiration date of April 2023. This interest rate swap effectively hedges $75.0 million of the $75.4 million of the then outstanding future variable rate LIBOR interest expense to a fixed rate interest expense. The derivative instrument qualified for accounting as a cash flow hedge in accordance with Financial Accounting Standards Board (FASB) Accounting Standard Codification (ASC) Topic 815, Derivatives and Hedging, and we designated it as such.

The settlement value of the interest rate swap is $0.7 million as of September 30, 2018 and is included in other noncurrent assets in the condensed consolidated balance sheet.  The unrealized gain on the swap of $0.6 million, net of tax, is included in the condensed consolidated statement of other comprehensive income (loss).

Forward Contract

We use forward contracts to mitigate our exposure associated with fluctuations in foreign currency exchange rates. We do not use such forward contracts for speculative or trading purposes.

In August 2018, we provided a Turkish Lira denominated intercompany loan to an EMEA subsidiary in the amount of $15.0 million converted at the spot rate on the transaction date to 96.6 million Turkish Lira to fund their working capital requirements. We entered into a forward contract, with the same expiration as that of the intercompany loan’s maturity in October 2018, for a notional amount of 101.5 million Turkish Lira to reduce our exposure to currency fluctuations from the settlement of this Turkish Lira denominated intercompany loan of 96.6 million Turkish Lira and accrued interest of 4.9 million Turkish Lira. The derivative instrument qualifies for accounting as a cash flow hedge in accordance with FASB ASC Topic 815, Derivatives and Hedging, and we designated it as such at inception.

The settlement liability of the forward contract is $1.2 million as of September 30, 2018 and is included in accounts payable and accrued expenses in the condensed consolidated balance sheet. 

For the three and nine months ended September 30, 2018, a loss of $1.1 million has been included in realized loss on foreign currency remeasurement in the condensed consolidated statements of operations offsetting the remeasurement of the Turkish Lira denominated intercompany loan receivable. An additional $0.1 million unrealized loss on the forward contract, net of tax, is included in the condensed consolidated statement of other comprehensive income (loss).

Use of Estimates

The preparation of these condensed consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the condensed consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.

Recently Issued Accounting Pronouncements

Accounting Pronouncements Adopted in 2018

Revenue from Contracts with Customers

In May 2014, the FASB issued Topic 606, which provides new recognition and disclosure requirements for revenue from contracts with customers that supersedes the existing revenue recognition guidance. The new recognition requirements focus on when the customer obtains control of the goods or services, rather than the current risks and rewards model of recognition. The core principle of the new standard is that an entity will recognize revenue when it transfers goods or services to its customers in an amount that reflects the consideration an entity expects to be entitled to for those goods or services. The new disclosure requirements included in these financial statements contain information intended to communicate the nature, amount, timing and any uncertainty of revenue and cash flows from the applicable contracts, including any significant judgments and changes in judgments and assets recognized from the costs to obtain or fulfill a contract.

We adopted Topic 606 as of January 1, 2018 with retrospective application to January 1, 2016 through December 31, 2017.  See Note 2, Revenue from Contracts with Customers and Note 13, Adjustments to Previously Reported Financial Statements from the Adoption of an Accounting Pronouncement, for further discussion of the adoption of this standard, including the impact on our previously reported financial statements.

Cash Flow Presentation

In August 2016, the FASB issued ASU 2016-15, Classification of Certain Cash Receipts and Cash Payments, that clarifies how certain cash receipts and cash payments are presented and classified in the condensed consolidated statements of cash flows.  In addition, in November 2016, the FASB issued ASU 2016-18, Restricted Cash, that requires restricted cash and cash equivalents to be included with the amount of cash and cash equivalents that are reconciled on the condensed consolidated statements of cash flows. We adopted these ASUs as of January 1, 2018 with retrospective application to each period presented.

The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the condensed consolidated balance sheets which total the same such amounts in the condensed consolidated statements of cash flows:

	September 30,		December 31,		September 30,		December 31,
	2018		2017		2017		2016
	(in thousands)
Cash and cash equivalents	$	110,838	$	148,113	$	139,065	$	119,066
Restricted cash		2,845		3,849		3,802		2,259
Restricted cash included within other noncurrent assets		475		475		475		8,538
Total cash, cash equivalents and restricted cash shown in the condensed consolidated statements of cash flows	$	114,158	$	152,437	$	143,342	$	129,863

See Note 13, Adjustments to Previously Reported Financial Statements from the Adoption of an Accounting Pronouncement, for further discussion of the adoption of these standards, including the impact on our previously reported financial statements.  

Income Taxes

In December 2017, the SEC staff issued Staff Accounting Bulletin 118 (SAB 118), which provides relief for companies that have not completed their accounting for the effects of The Tax Cuts and Jobs Act (Tax Reform Act) but can determine a reasonable estimate of those effects to allow them to include a provisional amount based on their reasonable estimate in their financial statements. The guidance in SAB 118 also allows companies to adjust the provisional amounts during a one-year “measurement period” which is similar to the measurement period used when accounting for business combinations. In the accompanying consolidated financial statements, we have not yet completed our accounting for all the tax effects associated with the enactment of the Tax Reform Act. However, we have, in certain cases made a reasonable estimate of the effects on our existing carryforward attributes and the one-time transition tax. See Note 9, Income Taxes, for further discussion.

Accounting Pronouncements Not Yet Adopted

Leases

In February 2016, the FASB issued ASU 2016-02, Leases. ASU 2016-02 is a comprehensive new recognition model for leases requiring a lessee to recognize the asset and liability that arise from leases. For public companies, this new standard is effective for financial statements issued for annual periods beginning after December 16, 2018. Entities may elect to early adopt the lease standard in 2016. In adopting ASU 2016-02, entities are required to recognize and measure leases at the beginning of the earliest period presented using a modified retrospective approach. The modified retrospective approach includes a number of optional practical expedients that entities may elect to apply. In July 2018, the FASB issued ASU 2018-11, Leases: Targeted Improvements, that provides an alternative transition method of adoption, permitting the recognition of a cumulative-effect adjustment to retained earnings on the date of adoption.

We will adopt this new standard on the effective date using the alternative transition method provided by ASU 2018-11 and we are currently evaluating the potential changes from ASU 2018-11 to our future financial reporting and disclosures and designing and implementing related processes and controls.  We expect that the standard will have a material impact on our total assets and liabilities for the addition of right-of-use assets and lease liabilities, but we do not expect it to have a material impact on our results of operations or liquidity.  

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Revenue From Contracts with Customers

9 Months Ended

Sep. 30, 2018

Revenue From Contract With Customer [Abstract]

Revenue From Contracts with Customers

Note 2. Revenue From Contracts with Customers

The following tables represents the disaggregation of our net sales revenue by contract type for each of our reportable segments (in thousands):

	Three Months Ended September 30, 2018
	U.S.		Asia		Mexico		EMEA		Total
Wind blade sales	$	28,082	$	61,139	$	78,892	$	66,795	$	234,908
Precision molding and    assembly systems sales		775		7,608		89		—		8,472
Transportation sales		6,769		—		—		—		6,769
Other sales		1,063		1,480		584		1,700		4,827
Total net sales	$	36,689	$	70,227	$	79,565	$	68,495	$	254,976

	Nine Months Ended September 30, 2018
	U.S.		Asia		Mexico		EMEA		Total
Wind blade sales	$	100,723	$	196,490	$	190,530	$	187,698	$	675,441
Precision molding and    assembly systems sales		4,997		25,516		1,067		—		31,580
Transportation sales		18,281		—		—		—		18,281
Other sales		3,507		3,822		2,285		4,651		14,265
Total net sales	$	127,508	$	225,828	$	193,882	$	192,349	$	739,567

	Three Months Ended September 30, 2017
	U.S.		Asia		Mexico		EMEA		Total
Wind blade sales	$	41,293	$	96,654	$	59,634	$	40,479	$	238,060
Precision molding and    assembly systems sales		500		4,161		823		—		5,484
Transportation sales		3,376		—		—		—		3,376
Other sales		2,556		2,138		237		1,647		6,578
Total net sales	$	47,725	$	102,953	$	60,694	$	42,126	$	253,498

	Nine Months Ended September 30, 2017
	U.S.		Asia		Mexico		EMEA		Total
Wind blade sales	$	125,831	$	245,633	$	153,302	$	134,752	$	659,518
Precision molding and    assembly systems sales		5,444		11,225		1,612		—		18,281
Transportation sales		9,084		—		—		—		9,084
Other sales		2,948		4,875		3,196		3,793		14,812
Total net sales	$	143,307	$	261,733	$	158,110	$	138,545	$	701,695

In addition, most of our net sales are made directly to our customers, primarily wind turbine manufacturers, under our long-term contracts which are typically five years in length.

Contract Assets and Liabilities

Contract assets consist of unbilled amounts typically resulting from revenue recognized over time for products in production and the revenue recognized exceeds the amount billed to the customer. The contract assets are recorded as current assets in the condensed consolidated balance sheets. Contract liabilities consist of advance payments in excess of costs incurred. These amounts were historically recorded as customer deposits which primarily related to progress payments received as precision molding and assembly systems were being manufactured. The contract liabilities are recorded as current liabilities in the condensed consolidated balance sheets and are reduced as we record revenue over time.  

These contract assets and liabilities are reported on the condensed consolidated balance sheets net on a contract-by-contract basis at the end of each reporting period, as demonstrated in the table below.

Contract assets and contract liabilities consisted of the following:

	September 30,			December 31,
	2018			2017			$ Change
	(in thousands)
Gross contract assets	$	137,083		$	112,557		$	24,526
Less: reclassification from contract liabilities		(14,818	)		(6,938	)		(7,880	)
Contract assets	$	122,265		$	105,619		$	16,646

	September 30,			December 31,
	2018			2017			$ Change
	(in thousands)
Gross contract liabilities	$	23,153		$	9,701		$	13,452
Less: reclassification to contract assets		(14,818	)		(6,938	)		(7,880	)
Contract liabilities	$	8,335		$	2,763		$	5,572

Contracts assets increased by $16.6 million from December 31, 2017 to September 30, 2018 due to incremental unbilled production during the nine months ended September 30, 2018. Contracts liabilities increased by $5.6 million from December 31, 2017 to September 30, 2018 due to the amounts billed to customers exceeding the progress billings received primarily related to precision molding and assembly systems being produced in the nine months ended September 30, 2018.

The time it takes to produce a single blade is typically between 24 to 36 hours. The time it takes to produce a mold is typically between 3 to 6 months.

For the three months ended September 30, 2018, we recognized no revenue, and for the nine months ended September 30, 2018, we recognized $2.8 million of revenue, in each case, that was included in the corresponding contract liability balance at the beginning of the period.

Performance Obligations

Remaining performance obligations represent the transaction price of firm orders for which work has not been performed and excludes any unexercised contract options.

For the three and nine months ended September 30, 2018, net revenue recognized from our performance obligations satisfied in previous periods decreased by $3.9 million and $7.9 million, respectively. This primarily relates to changes in certain of our estimated total contract values and related percentage of completion estimates.

As of September 30, 2018, the aggregate amount of the transaction price allocated to the remaining performance obligations was  approximately $5.6 billion. We estimate that we will recognize the remaining performance obligations as revenue as follows: 5 percent in the remainder of 2018, 27 percent in 2019, 27 percent in 2020, 17 percent in 2021, 14 percent in 2022 and the remaining 10 percent in 2023.

Pre-Production Investments

We recognize an asset from the costs incurred to fulfill a contract when those costs meet all of the following criteria:  (a) the costs relate directly to a contract or to an anticipated contract that we can specifically identify; (b) the costs generate or enhance our resources that will be used in satisfying performance obligations in the future; and, (c) the costs are expected to be recovered. We capitalize the costs related to training our workforce to execute the manufacturing services and other facility set-up costs related to preparing for production.  We factor these costs into our estimated cost analysis for the overall contract.  Costs capitalized are amortized over the number of units produced during the contract term. As of September 30, 2018, the cost and accumulated amortization of such assets totaled $4.8 million and $1.7 million, respectively. As of December 31, 2017, the cost and accumulated amortization of such assets totaled $2.4 million and $1.4 million, respectively. These amounts are included in other noncurrent assets in the condensed consolidated balance sheet.

In applying the practical expedient as permitted under Topic 606, we recognize the incremental costs of obtaining contracts as an expense when incurred if the amortization period of the asset that we otherwise would have recognized is one year or less.  These costs are included in cost of goods sold.

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Significant Risks and Uncertainties

9 Months Ended

Sep. 30, 2018

Risks And Uncertainties [Abstract]

Significant Risks and Uncertainties

Note 3. Significant Risks and Uncertainties

Our revenues and receivables are from a small number of customers. As such, our production levels are dependent on these customers’ orders. See Note 11, Concentration of Customers.

We maintain our U.S. cash in bank deposit accounts that, at times, exceed U.S. federally insured limits. U.S. bank accounts are guaranteed by the Federal Deposit Insurance Corporation (FDIC) in an amount up to $250,000 during 2018 and 2017. At September 30, 2018 and December 31, 2017, we had $70.6 million and $98.9 million, respectively, of cash in deposit accounts in U.S. banks, which was in excess of FDIC limits. We have not experienced losses in any such accounts.

We also maintain cash in bank deposit accounts outside the U.S. with no insurance. At September 30, 2018, this includes $29.6 million in China, $8.6 million in Turkey and $2.0 million in Mexico. We have not experienced losses in these accounts. In addition, at September 30, 2018, we have short-term deposits in interest bearing accounts of $2.8 million in China, which are reported as restricted cash in our condensed consolidated balance sheets. At September 30, 2018, we also have long-term deposits in interest bearing accounts of $0.5 million in Iowa which are reported as restricted cash within the caption other noncurrent assets in our condensed consolidated balance sheets.

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Related-Party Transactions

9 Months Ended

Sep. 30, 2018

Related Party Transactions [Abstract]

Related-Party Transactions

Note 4. Related-Party Transactions

Related party transactions include transactions between us and certain of our affiliates. The following transactions were in the normal course of operations and were measured at the exchange amount, which is the amount of consideration established and agreed to by the parties.

We have entered into several agreements with subsidiaries of General Electric Company and its consolidated affiliates (GE) relating to the operation of its business. As a result of these agreements, GE has been a debtor, creditor and holder of both preferred and common shares. During the second quarter of 2017, GE reduced its holdings of our common shares to less than five percent of the total shares then outstanding and completely divested of our common shares during the third quarter of 2017.

We have entered into five separate supply agreements with GE to manufacture wind blades in Newton, Iowa; Taicang Port, China; Juárez, Mexico (2) and Izmir, Turkey. The supply agreements in Taicang Port, China and Izmir, Turkey expired on December 31, 2017 and GE did not renew or extend these two contracts. For the six months ended June 30, 2017, we recorded related-party sales with GE of $198.6 million.

Certain of our existing stockholders, consisting of entities associated with Element Partners, Angeleno Group and Landmark Partners, each of which is an affiliate of a member of the board of directors, as well as certain executive officers and a director, purchased an aggregate of 1,250,000 shares of our common stock in the IPO. In addition, all outstanding obligations and accrued interest under our subordinated convertible promissory notes held by certain existing stockholders, including Element Partners, Angeleno Group and Landmark Partners, were converted into an aggregate of 1,079,749 shares of our common stock concurrent with the closing of the IPO at the public offering price of $11.00 per share.  

In connection with our secondary offering in May 2017, certain entities associated with Element Partners, Angeleno Group, Landmark Partners and NGP Energy Technology Partners, L.P, as well as certain of our executive officers sold an aggregate of 5,075,000 shares of our common stock at the public offering price of $16.35 per share.

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Accounts Receivable

9 Months Ended

Sep. 30, 2018

Receivables [Abstract]

Accounts Receivable

Note 5. Accounts Receivable

Accounts receivable consisted of the following:

	September 30,		December 31,
	2018		2017
	(in thousands)
Trade accounts receivable	$	112,258	$	117,794
Other accounts receivable		4,808		3,782
Total accounts receivable	$	117,066	$	121,576

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Property, Plant, and Equipment, Net

9 Months Ended

Sep. 30, 2018

Property Plant And Equipment [Abstract]

Property, Plant, and Equipment, Net

Note 6. Property, Plant and Equipment, Net

Property, plant and equipment, net consisted of the following:

	September 30,			December 31,
	2018			2017
	(in thousands)
Machinery and equipment	$	113,686		$	100,681
Buildings		15,001			14,711
Leasehold improvements		33,229			21,853
Office equipment and software		21,542			18,664
Furniture		18,703			19,017
Vehicles		287			294
Construction in progress		19,097			10,687
Total		221,545			185,907
Accumulated depreciation		(70,614	)		(62,427	)
Property, plant and equipment, net	$	150,931		$	123,480

Total depreciation expense for the three months ended September 30, 2018 and 2017 was $5.8 million and $5.1 million, respectively, and $18.6 million and $13.5 million for the nine months ended September 30, 2018 and 2017, respectively.

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Long-Term Debt, Net of Debt Issuance Costs and Current Maturities

9 Months Ended

Sep. 30, 2018

Debt Disclosure [Abstract]

Long-Term Debt, Net of Debt Issuance Costs and Current Maturities

Note 7. Long-Term Debt, Net of Debt Issuance Costs and Current Maturities

Long-term debt, net of debt issuance costs and current maturities, consisted of the following:

	September 30,			December 31,
	2018			2017
	(in thousands)
Senior term loan—U.S.	$	—		$	71,250
Senior revolving loan—U.S.		90,414			2,820
Accounts receivable financing—EMEA		10,185			14,100
Equipment financing—EMEA		13,412			16,901
Equipment capital lease—U.S.		26			536
Equipment capital lease—EMEA		7,404			5,058
Equipment capital lease—Mexico		12,268			12,844
Equipment loan—Mexico		5			47
Total long-term debt		133,714			123,556
Less: Debt issuance costs		(930	)		(2,171	)
Total long-term debt, net of debt issuance costs		132,784			121,385
Less: Current maturities of long-term debt		(39,201	)		(35,506	)
Long-term debt, net of debt issuance costs and current maturities	$	93,583		$	85,879

In April 2018, we entered into a new credit agreement (the Credit Agreement) with four lenders consisting of a multi-currency, revolving credit facility in an aggregate principal amount of $150.0 million, including a $25.0 million letter of credit sub-facility. We drew down $75.4 million on the revolving credit facility in connection with the closing of the transactions contemplated by the Credit Agreement and used the proceeds to pay all outstanding amounts due and payable under our senior secured credit facility, various fees and expenses and related accrued interest. All borrowings and amounts outstanding under the Credit Agreement are scheduled to mature in April 2023.

Interest accrues at a variable rate equal to LIBOR plus an initial margin of 1.5% (3.7% as of September 30, 2018), which may vary based on our total net leverage ratio as defined in the Credit Agreement. Interest is paid monthly and we are not obligated to make any principal repayments prior to the maturity date so long as we are not in default under the Credit Agreement. We may prepay borrowings without penalty under the Credit Agreement.

In April 2018, we also entered into an interest rate swap arrangement to fix a notional amount of $75.0 million under the Credit Agreement at an effective interest rate of 4.2% for a period of five years.

In August 2018, we borrowed an additional $15.0 million under the Credit Agreement in order to fund the working capital requirements of one of our EMEA subsidiaries.

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Share-Based Compensation Plans

9 Months Ended

Sep. 30, 2018

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Share-Based Compensation Plans

Note 8. Share-Based Compensation Plans

Our Amended and Restated 2015 Stock Option and Incentive Plan (the 2015 Plan) provides for the issuance of incentive stock options, non-qualified stock options, stock appreciation rights, restricted stock units, restricted stock awards, unrestricted stock awards, cash-based awards, performance share awards and dividend equivalent rights to certain employees, non-employee directors and consultants. Under the 2015 Plan, we have granted awards of stock options, restricted stock units (RSUs) and performance-based restricted stock units (PSUs) to certain employees and non-employee directors.

During the nine months ended September 30, 2018, we issued to certain employees and non-employee directors an aggregate of 149,012 timed-based RSUs, 121,836 PSUs that vest upon achievement of a cumulative, three-year Adjusted EBITDA target measured from January 1, 2018 through December 31, 2020, and 170,712 PSUs that vest upon achievement of certain stock price hurdles for the period of the grant date through December 31, 2020. 100% of the time-based RSUs vest on the third anniversary date of the grant date. Each of the time-based and performance-based awards are subject to the recipient’s continued service with us, the terms and conditions of the 2015 Plan and the applicable award agreement.

The share-based compensation expense recognized in the condensed consolidated statements of operations was as follows:

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2018		2017		2018		2017
	(in thousands)
Cost of goods sold	$	313	$	210	$	1,268	$	755
General and administrative expenses		1,659		833		5,703		4,039
Total share-based compensation expense	$	1,972	$	1,043	$	6,971	$	4,794

The share-based compensation expense recognized by award type was as follows:

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2018		2017		2018		2017
	(in thousands)
RSUs	$	1,112	$	382	$	3,595	$	1,546
Stock options		460		661		2,491		3,248
PSUs		400		-		885		-
Total share-based compensation expense	$	1,972	$	1,043	$	6,971	$	4,794

As of September 30, 2018, the unamortized cost of the outstanding RSUs and PSUs was $4.8 million and $3.9 million, respectively, which we expect to recognize in the condensed consolidated financial statements over weighted-average periods of approximately 1.7 years and 2.5 years, respectively. Additionally, the total unrecognized cost related to non-vested stock option awards was $2.3 million, which we expect to recognize in the condensed consolidated financial statements over a weighted-average period of approximately 1.5 years.    

The summary of activity under our incentive plans is as follows:

				Stock Options							RSUs					PSUs
	Shares Available for Grant			Shares			Weighted- Average Exercise Price		Options Exercisable		Units			Weighted- Average Grant Date Fair Value		Units			Weighted- Average Grant Date Fair Value
Balance as of December 31, 2017		4,731,117			3,203,290		$	13.34		890,433		613,380		$	15.02		—		$	—
Increase in shares authorized		1,360,826			—			—				—			—		—			—
Granted		(451,212	)		9,652			22.67				149,012			23.37		292,548			22.67
Exercised/vested		—			(186,959	)		11.83				(298,036	)		13.03		—			—
Forfeited/cancelled		115,067			(105,750	)		13.00				(5,053	)		23.04		(4,264	)		22.67
Balance as of September 30, 2018		5,755,798			2,920,233			13.48		1,393,408		459,303			18.93		288,284			22.67

The fair value of RSUs which vested during the nine months ended September 30, 2018 was $3.9 million.  In addition, during the nine months ended September 30, 2018, we repurchased 100,891 shares for $2.9 million related to tax withholding requirements on vested RSU awards.

The following table summarizes the outstanding and exercisable stock option awards as of September 30, 2018:

		Options Outstanding						Options Exercisable
Range of Exercise Prices:		Shares		Weighted- Average Remaining Contractual Life (in years)		Weighted- Average Exercise Price		Shares		Weighted- Average Exercise Price
$8.49			16,397		1.8	$	8.49		16,397	$	8.49
$	10.87		1,756,792		6.7		10.87		884,692		10.87
$11.00 to $16.53			624,251		7.3		16.19		291,229		16.34
$17.68 to $18.70			305,241		7.7		18.67		162,142		18.68
$18.77 to $22.67			217,552		9.0		19.92		38,948		20.14
$8.49 to $22.67			2,920,233		7.1		13.48		1,393,408		13.15

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Income Taxes

9 Months Ended

Sep. 30, 2018

Income Tax Disclosure [Abstract]

Income Taxes

Note 9. Income Taxes

Income taxes for the three and nine months ended September 30, 2018 were lower than for the three and nine months ended September 30, 2017 primarily due to the reversal of our valuation allowances related to our U.S. federal deferred tax assets in the three months ended September 30, 2018 totaling $10.9 million. This valuation allowance release was the result of our decision during the three months ended September 30, 2018 to account for the impact of the global intangible low-taxed income (GILTI) as a current period item. With this election and our adoption of ASC 606, we ceased to be in a cumulative loss position in the U.S. and we have positive evidence that our U.S. tax attributes will be fully realized in the future.

We will continue to refine our provisional estimates of our computations of the GILTI, the deduction for foreign-derived intangible income (FDII) and other parts of the Tax Reform Act, which may result in changes to the expected impact for 2018. We also continue to not record a deferred tax liability related to unremitted foreign earnings as we maintain our assertion to permanently reinvest our unremitted foreign earnings. 

An ownership change under Sections 382 and 383 of the Internal Revenue Code was deemed to occur in June 2018. In general, a Section 382 and 383 ownership change occurs if there is a cumulative change in our ownership by “5% shareholders” (as defined in the Internal Revenue Code of 1986, as amended) that exceeds 50 percentage points over a rolling three-year period. Based on the analysis performed, however, we do not believe that the Section 382 and 383 annual limitation will materially impact our ability to utilize the tax attributes that existed as of the date of the ownership. Additional ownership changes in the future could result in additional limitations on our net operating loss carryforwards and credits.

Income taxes for the three and nine months ended September 30, 2018 have also been adjusted to reflect China’s retroactive increase in the deduction for research and development expenses. No other changes in tax law during the quarter have had a material impact on our income tax provision.

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Commitments and Contingencies

9 Months Ended

Sep. 30, 2018

Commitments And Contingencies Disclosure [Abstract]

Commitments and Contingencies

Note 10. Commitments and Contingencies

Legal Proceedings

From time to time, we may be involved in disputes or litigation relating to claims arising out of our operations.

In March 2015, a complaint was filed against us in the Superior Court of the State of Arizona (Maricopa County) by a former employee, alleging that we had agreed to make certain cash payments to such employee upon any future sale of the Company. We filed a motion to dismiss the complaint in April 2015, which was denied. We subsequently filed an answer to the complaint in July 2015 denying the substantive allegations of the complaint. The parties completed court-ordered mediation in December 2015 but were not able to reach a settlement. We filed a motion for summary judgment to dismiss the complaint in April 2016 and the court denied the motion in August 2016. The court recently postponed the trial date from August 2018 until June 2019. We continue to deny the substantive allegations of the complaint and intend to vigorously defend this lawsuit; however, we are currently unable to determine the ultimate outcome of this case.

In August 2015, we entered into a transition agreement with our former Senior Vice President – Asia, pursuant to which that individual transitioned out of this role at the end of 2015 and was to serve in a consulting capacity in 2016 and 2017. In January 2016, following our discovery that the individual had materially violated the terms of the transition agreement, we terminated the consultancy for cause. In April 2016, an arbitration claim was filed in China by the individual with the Taicang Labor and Personnel Dispute Arbitration Committee alleging that we improperly terminated the transition agreement. The individual is demanding that we honor the terms of the transition agreement and pay compensation and fees under the transition agreement, which in the aggregate totals approximately $2.6 million. In addition, the individual is also challenging the validity of our termination of an option to purchase 164,880 shares of our common stock and 77,760 restricted stock units awarded under the 2015 Plan, which were canceled in January 2016 when the consultancy was terminated. The Taicang Labor and Personnel Dispute Arbitration Committee awarded damages to the individual of approximately $1.2 million but rejected the claims regarding the termination of the stock option and restricted stock unit awards. We subsequently appealed the arbitration award in favor of the individual to the Taicang Municipal People’s Court, which affirmed the arbitration award in June 2018. We have appealed this judgment to an appellate level court in the Jiangsu Province and the appeal remains pending. We previously established a reserve for these matters and do not believe the award, if upheld on appeal, will have a material impact on our operating results or financial condition.

In June 2018, Iowa OSHA, a division of the Iowa Department of Labor, issued a citation and notification of penalty to us alleging that certain of our workplace practices and conditions at our Newton, Iowa wind blade manufacturing facility had violated the Iowa Occupational Safety and Health Act. Specifically, the citation cited us for multiple alleged violations and proposed that we pay an aggregate penalty of $0.2 million. In June 2018, we notified Iowa OSHA that we were contesting all of the alleged violations and proposed penalties. In June 2018, the Labor Commissioner of the Iowa Department of Labor subsequently filed a complaint with the State of Iowa Employment Appeal Board, petitioning the appeal board to affirm the citation and notification of penalty that Iowa OSHA issued to us. In July 2018, we then filed a response with the appeal board denying the substantive allegations of the complaint. A hearing date has been set for June 2019 and the matter remains pending.

From time to time, we are party to various lawsuits, claims, and other legal proceedings that arise in the ordinary course of business, some of which are covered by insurance. Upon resolution of any pending legal matters, we may incur charges in excess of presently established reserves. Our management does not believe that any such charges would, individually or in the aggregate, have a material adverse effect on our financial condition, results of operations or cash flows.  

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Concentration of Customers

9 Months Ended

Sep. 30, 2018

Risks And Uncertainties [Abstract]

Concentration of Customers

Note 11. Concentration of Customers

Revenues from certain customers in excess of 10 percent of our total consolidated revenues are as follows:

	Three Months Ended										Nine Months Ended
	September 30,										September 30,
	2018					2017					2018					2017
Customer	Revenues		% of Total			Revenues		% of Total			Revenues		% of Total			Revenues		% of Total
	(dollars in thousands)
GE	$	81,699		32.0	%	$	98,962		39.0	%	$	244,534		33.1	%	$	297,550		42.4	%
Vestas		73,584		28.9			72,366		28.6			226,153		30.6			181,215		25.8
Nordex Acciona		46,103		18.1			43,052		17.0			141,663		19.1			126,214		18.0
Siemens Gamesa		33,964		13.3			34,999		13.8			84,782		11.5			86,675		12.4
Other		19,626		7.7			4,119		1.6			42,435		5.7			10,041		1.4
Total	$	254,976		100.0	%	$	253,498		100.0	%	$	739,567		100.0	%	$	701,695		100.0	%

Trade accounts receivable from certain customers in excess of 10 percent of our total consolidated trade accounts receivable are as follows:

	September 30,			December 31,
	2018			2017
Customer	% of Total			% of Total
GE		9.5	%		18.9	%
Vestas		41.1	%		52.4	%
Nordex Acciona		34.6	%		19.5	%

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Segment Reporting

9 Months Ended

Sep. 30, 2018

Segment Reporting [Abstract]

Segment Reporting

Note 12. Segment Reporting

Our operating segments are defined geographically as the U.S., Asia, Mexico and EMEA. Financial results are aggregated into four reportable segments based on quantitative thresholds. All of our segments operate in their local currency, however a portion of the revenue attributable to our China and Mexico segments is derived in U.S. dollars because certain of our domestic subsidiaries are the contracting parties to the associated customer supply agreements.

The following tables set forth certain information regarding each of our segments:

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2018			2017			2018			2017
	(in thousands)
Revenues by segment:
U.S.	$	36,689		$	47,725		$	127,508		$	143,307
Asia		70,227			102,953			225,828			261,733
Mexico		79,565			60,694			193,882			158,110
EMEA		68,495			42,126			192,349			138,545
Total revenues	$	254,976		$	253,498		$	739,567		$	701,695
Revenues by geographic location (1):
U.S.	$	36,689		$	47,725		$	127,508		$	143,307
China		70,227			102,953			225,828			261,733
Mexico		79,565			60,694			193,882			158,110
Turkey		68,495			42,126			192,349			138,545
Total revenues	$	254,976		$	253,498		$	739,567		$	701,695
Income (loss) from operations:
U.S. (2)	$	(18,687	)	$	(7,474	)	$	(41,030	)	$	(21,148	)
Asia		7,401			22,104			23,204			55,452
Mexico		5,447			4,883			9,932			8,917
EMEA		13,050			1,478			36,262			8,555
Total income from operations	$	7,211		$	20,991		$	28,368		$	51,776

	September 30,		December 31,
	2018		2017
	(in thousands)
Property, plant and equipment, net:
U.S.	$	34,865	$	24,575
Asia (China)		30,345		28,887
Mexico		63,269		39,756
EMEA (Turkey)		22,452		30,262
Total property, plant and equipment, net	$	150,931	$	123,480

(1) Revenues are attributable to countries based on the location where the product is manufactured or the services are performed.

(2) The losses from operations in our U.S. segment includes corporate general and administrative costs of $9.8 million and $9.3 million for the three months ended September 30, 2018 and 2017, respectively, and $31.9 million and $28.4 million for the nine months ended September 30, 2018 and 2017.

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Adjustments to Previously Reported Financial Statements from the Adoption of an Accounting Pronouncement

9 Months Ended

Sep. 30, 2018

New Accounting Pronouncements And Changes In Accounting Principles [Abstract]

Adjustments to Previously Reported Financial Statements from the Adoption of an Accounting Pronouncement

Note 13. Adjustments to Previously Reported Financial Statements from the Adoption of an Accounting Pronouncement

As discussed in Note 1, Summary of Operations and Significant Accounting Policies, Topic 606 and ASUs 2016-15 and 2016-18 were adopted by us as of January 1, 2018 with retrospective application to January 1, 2016 through December 31, 2017.

The following tables summarize the effects of adopting Topic 606 and ASU 2016-18 had on our previously reported financial statements.

Condensed Consolidated Balance Sheet

(In thousands, except par value data)

	December 31, 2017
	As Reported			Adoption of Topic 606			As Adjusted
	(Unaudited)
Assets
Current assets:
Cash and cash equivalents	$	148,113		$	—		$	148,113
Restricted cash		3,849			—			3,849
Accounts receivable		121,576			—			121,576
Contract assets		—			105,619			105,619
Inventories		67,064			(62,952	)		4,112
Inventories held for customer orders		64,858			(64,858	)		—
Prepaid expenses and other current assets		27,507			—			27,507
Total current assets		432,967			(22,191	)		410,776
Property, plant, and equipment, net		123,480			—			123,480
Goodwill		2,807			—			2,807
Intangible assets, net		150			958			1,108
Other noncurrent assets		14,130			4,261			18,391
Total assets	$	573,534		$	(16,972	)	$	556,562
Liabilities and Stockholders’ Equity
Current liabilities:
Accounts payable and accrued expenses	$	166,743		$	—		$	166,743
Accrued warranty		29,163			1,256			30,419
Deferred revenue		81,048			(81,048	)		—
Customer deposits		10,134			(9,702	)		432
Current maturities of long-term debt		35,506			—			35,506
Contract liabilities		—			2,763			2,763
Total current liabilities		322,594			(86,731	)		235,863
Long-term debt, net of debt issuance costs and current maturities		85,879			—			85,879
Other noncurrent liabilities		4,444			494			4,938
Total liabilities		412,917			(86,237	)		326,680
Commitments and contingencies
Stockholders’ equity:
Common shares, $0.01 par value, 100,000 shares authorized and 34,049    shares issued and 34,021 shares outstanding at December 31, 2017		340			—			340
Paid-in capital		301,543			—			301,543
Accumulated other comprehensive loss		(558	)		—			(558	)
Accumulated deficit		(140,197	)		69,265			(70,932	)
Treasury stock, at cost, 28 shares at December 31, 2017		(511	)		—			(511	)
Total stockholders’ equity		160,617			69,265			229,882
Total liabilities and stockholders’ equity	$	573,534		$	(16,972	)	$	556,562

The primary effects of the adoption of Topic 606 on our condensed consolidated balance sheet include 1) amounts being recognized as revenue for work performed as production takes place over time as contract assets, which differs from the prior practice of including the balances in inventory; 2) no longer reporting inventory held for customer orders or deferred revenue since revenue is now being recognized over the course of the production process, and before the product is delivered to the customer; 3) that contract liabilities are reported for amounts collected from customers in advance of the production of products, similar to our prior practice of recording customer deposits; and 4) the cumulative amount of the effect to prior periods’ net income related to the adoption of Topic 606 through December 31, 2017 is reflected in retained earnings.

Condensed Consolidated Income Statement

(In thousands, except per share data)

	Three Months Ended
	September 30, 2017
	As Reported			Adoption of Topic 606			As Adjusted
	(Unaudited)
Net sales	$	243,354		$	10,144		$	253,498
Cost of sales		198,141			12,699			210,840
Startup and transition costs		12,352			—			12,352
Total cost of goods sold		210,493			12,699			223,192
Gross profit		32,861			(2,555	)		30,306
General and administrative expenses		9,315			—			9,315
Income from operations		23,546			(2,555	)		20,991
Other income (expense):
Interest income		48			—			48
Interest expense		(3,254	)		—			(3,254	)
Realized gain on foreign currency remeasurement		39			—			39
Miscellaneous income		390			—			390
Total other expense		(2,777	)		—			(2,777	)
Income before income taxes		20,769			(2,555	)		18,214
Income tax benefit (provision)		(371	)		3,894			3,523
Net income	$	20,398		$	1,339		$	21,737
Weighted-average common shares outstanding:
Basic		33,891			33,891			33,891
Diluted		35,015			35,015			35,015
Net income per common share:
Basic	$	0.60		$	0.04		$	0.64
Diluted	$	0.58		$	0.04		$	0.62

The primary effects of the adoption of Topic 606 on our condensed consolidated income statement relate to amounts being recognized as revenue for work performed as production takes place over time, which differs from the prior practice of recognizing revenue when the product was delivered to the customer.

Condensed Consolidated Income Statement

(In thousands, except per share data)

	Nine Months Ended
	September 30, 2017
	As Reported			Adoption of Topic 606			As Adjusted
	(Unaudited)
Net sales	$	683,142		$	18,553		$	701,695
Cost of sales		568,659			23,836			592,495
Startup and transition costs		29,051			—			29,051
Total cost of goods sold		597,710			23,836			621,546
Gross profit		85,432			(5,283	)		80,149
General and administrative expenses		28,373			—			28,373
Income from operations		57,059			(5,283	)		51,776
Other income (expense):
Interest income		78			—			78
Interest expense		(9,215	)		—			(9,215	)
Realized loss on foreign currency remeasurement		(2,575	)		—			(2,575	)
Miscellaneous income		968			—			968
Total other expense		(10,744	)		—			(10,744	)
Income before income taxes		46,315			(5,283	)		41,032
Income tax provision		(8,514	)		4,009			(4,505	)
Net income	$	37,801		$	(1,274	)	$	36,527
Weighted-average common shares outstanding:
Basic		33,789			33,789			33,789
Diluted		34,748			34,748			34,748
Net income per common share:
Basic	$	1.12		$	(0.04	)	$	1.08
Diluted	$	1.09		$	(0.04	)	$	1.05

The primary effects of the adoption of Topic 606 on our condensed consolidated income statement relate to amounts being recognized as revenue for work performed as production takes place over time, which differs from the prior practice of recognizing revenue when the product was delivered to the customer.

Condensed Consolidated Statement of Comprehensive Income

(In thousands)

	Three Months Ended
	September 30, 2017
	As Reported		Adoption of Topic 606		As Adjusted
	(Unaudited)
Net income	$	20,398	$	1,339	$	21,737
Other comprehensive income:
Foreign currency translation adjustments		1,231		—		1,231
Comprehensive income	$	21,629	$	1,339	$	22,968

	Nine Months Ended
	September 30, 2017
	As Reported		Adoption of Topic 606			As Adjusted
	(Unaudited)
Net income	$	37,801	$	(1,274	)	$	36,527
Other comprehensive income:
Foreign currency translation adjustments		2,808		—			2,808
Comprehensive income	$	40,609	$	(1,274	)	$	39,335

Condensed Consolidated Statements of Changes in Stockholders’ Equity

(In thousands)

	Common				Paid-in		Accumulated other comprehensive			Accumulated			Treasury stock,			Total stockholders'
	Shares		Amount		capital		loss			deficit			at cost			equity
	(Unaudited)
Balance at December 31, 2017 - as reported		34,049	$	340	$	301,543	$	(558	)	$	(140,197	)	$	(511	)	$	160,617
Cumulative effect of the adoption of Topic 606		—		—		—		—			69,265			—			69,265
Balance at December 31, 2017 - as adjusted		34,049	$	340	$	301,543	$	(558	)	$	(70,932	)	$	(511	)	$	229,882

The adoption of Topic 606 increased our total stockholders’ equity in 2015 and 2016 by $61.2 million and $12.3 million, respectively and decreased our total stockholders’ equity in 2017 by $4.2 million.

Condensed Consolidated Statements of Cash Flows

(In thousands)

	Nine Months Ended
	September 30, 2017
	As Reported			Adoption of Topic 606			Adoption of ASU 2016-18			As Adjusted
	(Unaudited)
Cash flows from operating activities:
Net income	$	37,801		$	(1,274	)	$	—		$	36,527
Adjustments to reconcile net income to net cash    provided by operating activities:
Depreciation and amortization		13,622			521			—			14,143
Share-based compensation expense		4,794			—			—			4,794
Amortization of debt issuance costs		430			—			—			430
Deferred income taxes		—			(2,613	)		—			(2,613	)
Changes in assets and liabilities:
Accounts receivable		(66,438	)		—			—			(66,438	)
Contract assets and liabilities		—			7,604			—			7,604
Inventories		(24,979	)		24,644			—			(335	)
Prepaid expenses and other current assets		881			—			—			881
Other noncurrent assets		3,067			(2,619	)		(8,063	)		(7,615	)
Accounts payable and accrued expenses		47,498			585			—			48,083
Accrued warranty		8,238			(103	)		—			8,135
Customer deposits		9,019			(9,019	)		—			—
Deferred revenue		17,726			(17,726	)		—			—
Other noncurrent liabilities		(136	)		—			—			(136	)
Net cash provided by operating activities		51,523			—			(8,063	)		43,460
Cash flows from investing activities:
Purchase of property and equipment		(35,312	)		—			—			(35,312	)
Net cash used in investing activities		(35,312	)		—			—			(35,312	)
Cash flows from financing activities:
Repayments of term loan		(2,812	)		—			—			(2,812	)
Net proceeds from accounts receivable financing		8,196			—			—			8,196
Proceeds from working capital loans		6,620			—			—			6,620
Repayments of working capital loans		(11,258	)		—			—			(11,258	)
Net proceeds from other debt		4,556			—			—			4,556
Proceeds from exercise of stock options		988			—			—			988
Repurchase of common stock including shares withheld in lieu of income taxes		(1,264	)		—			—			(1,264	)
Restricted cash		(1,543	)		—			1,543			—
Net cash provided by financing activities		3,483			—			1,543			5,026
Impact of foreign exchange rates on cash and cash    equivalents		305			—			—			305
Net change in cash and cash equivalents		19,999			—			(6,520	)		13,479
Cash, cash equivalents and restricted cash, beginning of year		119,066			—			10,797			129,863
Cash, cash equivalents and restricted cash, end of period	$	139,065		$	—		$	4,277		$	143,342

The primary effects of the adoption of Topic 606 on our condensed consolidated statement of cash flows include 1) the establishment of contract assets and liabilities; 2) the reduction of inventory and elimination of inventory held for customer orders; and 3) the elimination of deferred revenue. For more details on these items, see the disclosure related to the effect of the adoption of Topic 606 on our condensed consolidated balance sheet.  

As part of our adoption of Topic 606, we have elected to use the following practical expedients:

- for completed contracts that have variable consideration, we have used the transaction price at the date on which the contract was completed, rather than estimating amounts for variable consideration in each comparative reporting period.

- for modified contracts, we did not separately evaluate the effects of the contract modifications before the beginning of the earliest period presented. Instead, we reflected the aggregate effect of all of the modifications that occur before the beginning of the earliest period presented in determining the transaction price, identifying the satisfied and unsatisfied performance obligations, and allocating the transaction price to the performance obligations.

- for all periods presented before the date of initial application, we did not disclose the amount of the transaction price allocated to remaining performance obligations, nor an explanation of when we expect to recognize that amount as revenue.

The impact of applying the above practical expedients may change the period of revenue recognition but not the total amount to be recognized under the contract; therefore, we believe that the application of the practical expedients is not material to the comparability of the information presented above and the accounting and financial reporting related to the adoption of Topic 606.  

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Summary of Operations and Significant Accounting Policies (Policies)

9 Months Ended

Sep. 30, 2018

Accounting Policies [Abstract]

Description of Business

Description of Business

TPI Composites, Inc. is the holding company that conducts substantially all of its business operations through its direct and indirect subsidiaries (collectively, the Company). The Company was founded in 1968 and has been producing composite wind blades since 2001. The Company’s knowledge and experience of composite materials and manufacturing originates with its predecessor company, Tillotson Pearson Inc., a leading manufacturer of high-performance sail and powerboats along with a wide range of composite structures used in other industrial applications. Following the separation from the boat building business in 2004, the Company reorganized in Delaware as LCSI Holding, Inc. and then changed its corporate name to TPI Composites, Inc. in 2008. The Company is currently headquartered in Scottsdale, Arizona and has expanded its global footprint to include domestic facilities in Newton, Iowa; Fall River, Massachusetts; Warren, Rhode Island and Santa Teresa, New Mexico and international facilities in Dafeng, China; Taicang Port, China; Taicang City, China; Yangzhou, China; Juárez, Mexico; Matamoros, Mexico; Izmir, Turkey and Kolding, Denmark.

References to TPI Composites, Inc, the “Company,” “we,” “us” or “our” in these notes refer to TPI Composites, Inc. and its consolidated subsidiaries.

Public Offerings and Stock Split

Public Offerings and Stock Split

In July 2016, we completed an initial public offering (IPO) of 7,187,500 shares of our common stock at a price of $11.00 per share, which included 937,500 shares issued pursuant to the underwriters’ over-allotment option. Certain of our existing shareholders, a non-employee director and executive officers purchased an aggregate of 1,250,000 shares of our common stock in the IPO included in the total issuance above. The net proceeds from the IPO were $67.2 million after deducting underwriting discounts and offering expenses. Immediately prior to the closing of the IPO, all shares of the then-outstanding redeemable preferred shares converted into an aggregate of 21,110,204 shares of our common stock and the redeemable preferred share warrants converted on a net issuance basis into 120,923 shares of our common stock. In addition, concurrent with the closing of the IPO, certain subordinated convertible promissory notes in the aggregate principal and interest amount of $11.9 million were converted into 1,079,749 shares of our common stock at the public offering price of $11.00 per share.

Prior to the IPO, in July 2016 we amended our amended and restated certificate of incorporation to effect a 360-for-1 forward stock split of our common stock. As a result of the stock split, we have adjusted the share amounts authorized and issuable under the share-based compensation plans. All share and per share common stock information (including the share-based compensation plans) referenced throughout the unaudited condensed consolidated financial statements and notes thereto have been retroactively adjusted to reflect this stock split. The stock split did not cause an adjustment to the par value of the authorized shares of our common stock.

In May 2017, we completed a secondary public offering of 5,075,000 shares of our common stock at a price of $16.35 per share, which included 575,000 shares issued pursuant to the underwriters’ option to purchase additional shares. All of the shares were sold by existing shareholders and certain of our executive officers. The selling shareholders received all of the net proceeds of $78.8 million from the secondary public offering. We did not sell any shares and did not receive any of the proceeds from the offering and the costs paid by us in connection with the offering of $0.8 million were recorded in general and administrative costs in the accompanying condensed consolidated statement of operations.  

Basis of Presentation

Basis of Presentation

We divide our business operations into four geographic operating segments—the United States (U.S.), Asia, Mexico and Europe, the Middle East and Africa (EMEA) as follows:

• Our U.S. segment includes (1) the manufacturing of wind blades at our Newton, Iowa plant, (2) the manufacturing of precision molding and assembly systems used for the manufacture of wind blades at our Warren, Rhode Island facility, (3) the manufacturing of composite solutions for the transportation industry, which we also conduct at our existing Rhode Island facility as well as at our Fall River, Massachusetts facility and at a second manufacturing facility in Newton, Iowa which commenced operations in the second quarter of 2018, (4) wind blade inspection and repair services in North America, (5) our advanced engineering center in Kolding, Denmark, which provides technical and engineering resources to our manufacturing facilities and (6) our corporate headquarters, the costs of which are included in general and administrative expenses.

• Our Asia segment includes (1) the manufacturing of wind blades at our facility in Taicang Port, China and at our two facilities in Dafeng, China, (2) the manufacturing of precision molding and assembly systems at our Taicang City, China facility and (3) wind blade inspection and repair services.  In March 2018, we entered into a new lease agreement with a third party related to the lease of a new manufacturing facility in the Yangzhou Economic & Technical Development Zone in Yangzhou, China and we expect to commence operations at this facility in early 2019.

• Our Mexico segment manufactures wind blades from our three facilities in Juárez, Mexico, the most recent of which commenced operations in January 2017.  In April 2017, we entered into a new lease agreement with a third party for a new manufacturing facility in Matamoros, Mexico and we commenced operations at this facility in the third quarter of 2018. This segment also manufactures precision molding and assembly systems and performs wind blade inspection and repair services.

• Our EMEA segment manufactures wind blades from our two facilities in Izmir, Turkey and also performs wind blade inspection and repair services.

The accompanying condensed consolidated financial statements include the accounts of TPI Composites, Inc. and of our majority owned subsidiaries. All significant intercompany transactions and balances have been eliminated.

The condensed consolidated financial statements included herein have been prepared by us without audit, pursuant to the rules and regulations of the SEC and should be read in conjunction with the audited consolidated financial statements for the year ended December 31, 2017 included in our Annual Report on Form 10-K. Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States (GAAP) have been condensed or omitted, as permitted by the SEC, although we believe the disclosures that are made are adequate to make the information presented herein not misleading. The accompanying condensed consolidated financial statements reflect, in the opinion of our management, all normal recurring adjustments necessary to present fairly our financial position at September 30, 2018, and the results of our operations, comprehensive income and cash flows for the periods presented. We restated our December 31, 2017 condensed consolidated balance sheet and the September 30, 2017 condensed consolidated statement of operations and cash flow for the effect of the adoption of Accounting Standards Update (ASU) 2014-09, Revenue from Contracts with Customers, (Topic 606), see Note 13, Adjustments to Previously Reported Financial Statements from the Adoption of an Accounting Pronouncement. Interim results for the three and nine months ended September 30, 2018 and 2017 are not necessarily indicative of the results to be expected for the full years.

As previously announced, effective January 1, 2018, we adopted the requirements of Topic 606 using the full retrospective method as further described in Recently Issued Accounting Pronouncements - Revenue from Contracts with Customers and Note 2, Revenue from Contracts with Customers. All amounts and disclosures set forth in this Quarterly Report on Form 10-Q reflect the adoption of Topic 606 and differ from amounts previously reported for prior periods. See Note 13, Adjustments to Previously Reported Financial Statements from the Adoption of an Accounting Pronouncement, for further discussion of the adoption of Topic 606, including the impact on our previously reported financial statements.

Revenue Recognition

Revenue Recognition

The majority of our revenue is generated from long-term contracts associated with manufacturing of wind blades and related services.  We account for a long-term contract when it has the approval from both parties, the rights of the parties are identified, payment terms are established, the contract has commercial substance and the collectability of consideration is probable.

To determine the proper revenue recognition method for each long-term contract, we evaluate whether the original contract should be accounted for as one or more performance obligations. This evaluation requires judgment and the decisions reached could change the amount of revenue and gross profit recorded in a given period. As most of our contracts contain multiple performance obligations, we allocate the total transaction price to each performance obligation based on the estimated relative standalone selling prices of the promised goods or services underlying each performance obligation. Our manufacturing services are customer specific and involve production of items that cannot be sold to other customers due to the customers’ protected intellectual property; therefore, we allocate the total transaction price under our contracts with multiple performance obligations using the contractually stated prices, as these prices represent the relative standalone selling price based on an expected cost plus margin model.  

Revenue is primarily recognized over time as we have an enforceable right to payment upon termination and we may not use or sell the product to fulfill other customers’ contracts.  In addition, the customer does not have return or refund rights for items produced that conform to the specifications included in the contract. Because control transfers over time, revenue is recognized based on the extent of progress towards the completion of the performance obligation. We use the cost-to-cost input measure of progress for our contracts as this method provides the best representation of the production progress towards satisfaction of the performance obligation as the materials are distinct to the product being manufactured because of customer specifications provided for in the contract, the costs incurred are proportional to the progress towards completion of the product, and the products do not involve significant pre-fabricated component parts. Under the cost-to-cost method, progress and the related revenue recognition is determined by a ratio of direct costs incurred to date in fulfillment of the contract to the total estimated direct costs required to complete the performance obligation.

Determining the revenue to be recognized for services performed under our manufacturing contracts involves significant judgments and estimates relating to the total consideration to be received and the expected total costs to complete the performance obligation.  The judgments and estimates relating to the total consideration to be received include the amount of variable consideration as our contracts typically provide the customer with a range of production output options from guaranteed minimum volume obligations to the production capacity of the facility, and customers will provide periodic non-cancellable commitments for the number of wind blades to be produced over the term of the agreement.  We use historical experience, customer commitments and forecasted future production based on the capacity of the plant to estimate the total revenue to be received to complete the performance obligation.  In addition, the amount of revenue per unit produced may vary based on the costs of production of the wind blades as we may be able to change the price per unit based on changes in the cost of production.  Further, some of our contracts provide opportunities for us to share in labor and material cost savings as well as absorb some additional costs as an incentive for more efficient production, both of which impact the margin realized on the contract and ultimately the total amount of revenue to be recognized.  Additionally, certain of our customer contracts provide for concessions by us for missed production deadlines.  

We estimate variable consideration at the most likely amount to which we expect to be entitled. We include estimated amounts in the 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. Our estimates of variable consideration and determination of whether to include estimated amounts in the transaction price are based largely on an assessment of our anticipated performance and all information available to us at the time of the estimate and may materially change as additional information becomes known.

Our contracts may be modified to account for changes in specifications of products and changing requirements. If the contract modifications are for goods or services that are not distinct from the existing contract, they are accounted for as if they were part of the original contract. The effect of a contract modification on the transaction price and the measure of progress for the performance obligation to which it relates is recognized as an adjustment to revenue on a cumulative catch-up basis. If contract modifications are for goods and services that are distinct from the existing contract and increases the amount of consideration reflecting the standalone sale price of the additional goods or services, then the contract modification is accounted for as a separate contract and is evaluated for one or more performance obligations.  

Each reporting period, we evaluate the progress towards satisfaction of each performance obligation based on any contract modifications that have occurred, cost incurred to date, and an estimate of the expected future revenue and costs to be incurred to complete the performance obligation. Based on this analysis, any changes in estimates of revenue, cost of sales, contract assets and liabilities and the related impact to operating income are recognized on a cumulative catch-up basis, which recognizes in the current period the cumulative effect of the changes on current and prior periods based on the percentage of completion of the performance obligation.

Wind blade pricing is based on annual commitments of volume as established in our customer’s contract and orders less than committed volume may result in a higher price per wind blade to our customers. Orders in excess of annual commitments may result in discounts to our customers from the contracted price for the committed volume. Our customers typically provide periodic purchase orders with the price per wind blade given the current cost of the bill of materials, labor requirements and volume desired.  We record an allowance for expected utilization of early payment discounts which are reported as a reduction of the related revenue.

Precision molding and assembly systems included in a customer’s contract are based upon the specific engineering requirements and design determined by the customer and are specific to the wind blade design and function desired. From the customer’s engineering specifications, a job cost estimate is developed along with a production plan, and the desired margin is applied based on the location the work is to be performed and complexity of the customer’s design. Precision molding and assembly systems are generally built to produce wind blades which may be manufactured by us in production runs specified in the customer contract.

Contract assets primarily relate to our rights to consideration for work completed but not billed at the reporting date on manufacturing services contracts.  The contract assets are transferred to accounts receivable when the rights become unconditional, which generally occurs when customers are invoiced upon the determination that a product conforms to the contract specifications and invoices are due based on each customers negotiated payment terms, which range from 15 to 65 days.  We apply the practical expedient that allows us to exclude payment terms under one year from the transfer of a promised good or service from consideration of a significant financing component in its contracts. With regards to the production of precision molding and assembly systems, our contracts generally call for progress payments to be made in advance of production. Generally, payment is made at certain percentage of completion milestones with the final payment due upon delivery to the manufacturing facility. These progress payments are recorded within contract liabilities as current liabilities in the condensed consolidated balance sheets and are reduced as we record revenue over time.  

Our customers may request, in situations where they do not have space available to receive products or do not want to take possession of products immediately for other reasons, that their finished products be stored by us in one of our facilities. Most of our contracts provide for a limited number of wind blades to be stored during the period of the contract with any additional wind blades stored subject to additional storage fees, which are included in the wind blade performance obligation revenue.  

Revenue related to non-recurring engineering and freight services provided under our customer contracts is recognized at a point in time following the transfer of control of the promised services to the customer. Customers usually pay the carrier directly for the cost of shipping associated with items produced.  When we pay the shipping costs, we apply the practical expedient that allows us to account for shipping and handling as a fulfillment costs and include the revenue in the associated performance obligation and the costs are included in cost of goods sold.

Taxes assessed by a governmental authority that are both imposed on and concurrent with specific revenue-producing transactions, that are collected by us from a customer, are excluded from revenue.

Warranty Expense

Warranty Expense

We provide a limited warranty for our mold and wind blade products, including parts and labor, with terms and conditions that vary depending on the product sold, generally for periods that range from two to five years. Warranty expense is recorded based upon estimates of future repairs using a probability-based methodology that considers previous warranty claims, identified quality issues and industry practices. Once the warranty period has expired, any remaining unused warranty accrual for the specific products is reversed against the current year warranty expense amount.

Warranty accrual at September 30 consisted of the following:

	2018
	(in thousands)
Warranty accrual at beginning of year	$	30,419
Accrual during the period		8,200
Cost of warranty services provided during the period		(3,153	)
Reversal of reserves upon warranty expiration		(2,762	)
Warranty accrual at end of period	$	32,704

Treasury Stock

Treasury Stock

Common stock purchased for treasury is recorded at historical cost. Transactions in treasury shares relate to share-based compensation plans and are recorded at weighted-average cost.

Net Income Per Common Share Calculation

Net Income Per Common Share Calculation

The basic net income per common share is computed by dividing the net income by the weighted-average number of common shares outstanding during a period. Diluted net income per common share is computed by dividing the net income by the weighted-average number of common shares outstanding plus potentially dilutive securities using the treasury stock method. The table below reflects the calculation of the weighted-average number of common shares outstanding, using the treasury stock method, used in computing basic and diluted earnings per common share:

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2018		2017		2018		2017
	(in thousands)
Basic weighted-average shares outstanding		34,419		33,891		34,212		33,789
Effect of dilutive awards		1,863		1,124		1,734		959
Diluted weighted-average shares outstanding		36,282		35,015		35,946		34,748

Share-based compensation awards of 7,000 shares and 63,000 shares were excluded from the computation of diluted net income per share for the three and nine months ended September 30, 2018, respectively, because their effect would be anti-dilutive. We did not have any potential dilutive securities which were excluded from the computation of diluted net income per share for the three and nine months ended September 30, 2017.

Financial Instruments

Financial Instruments

Interest Rate Swap

We use interest rate swap contracts to mitigate our exposure to interest rate fluctuations associated with our new credit agreement (the Credit Agreement) that we entered into in April 2018. We do not use such swap contracts for speculative or trading purposes.

To offset the variability of future interest payments on the Credit Agreement arising from changes in the London Interbank Offered Rate (LIBOR), in April 2018, we entered into an interest rate swap agreement with a financial institution for a notional amount of $75.0 million with an expiration date of April 2023. This interest rate swap effectively hedges $75.0 million of the $75.4 million of the then outstanding future variable rate LIBOR interest expense to a fixed rate interest expense. The derivative instrument qualified for accounting as a cash flow hedge in accordance with Financial Accounting Standards Board (FASB) Accounting Standard Codification (ASC) Topic 815, Derivatives and Hedging, and we designated it as such.

The settlement value of the interest rate swap is $0.7 million as of September 30, 2018 and is included in other noncurrent assets in the condensed consolidated balance sheet.  The unrealized gain on the swap of $0.6 million, net of tax, is included in the condensed consolidated statement of other comprehensive income (loss).

Forward Contract

We use forward contracts to mitigate our exposure associated with fluctuations in foreign currency exchange rates. We do not use such forward contracts for speculative or trading purposes.

In August 2018, we provided a Turkish Lira denominated intercompany loan to an EMEA subsidiary in the amount of $15.0 million converted at the spot rate on the transaction date to 96.6 million Turkish Lira to fund their working capital requirements. We entered into a forward contract, with the same expiration as that of the intercompany loan’s maturity in October 2018, for a notional amount of 101.5 million Turkish Lira to reduce our exposure to currency fluctuations from the settlement of this Turkish Lira denominated intercompany loan of 96.6 million Turkish Lira and accrued interest of 4.9 million Turkish Lira. The derivative instrument qualifies for accounting as a cash flow hedge in accordance with FASB ASC Topic 815, Derivatives and Hedging, and we designated it as such at inception.

The settlement liability of the forward contract is $1.2 million as of September 30, 2018 and is included in accounts payable and accrued expenses in the condensed consolidated balance sheet. 

For the three and nine months ended September 30, 2018, a loss of $1.1 million has been included in realized loss on foreign currency remeasurement in the condensed consolidated statements of operations offsetting the remeasurement of the Turkish Lira denominated intercompany loan receivable. An additional $0.1 million unrealized loss on the forward contract, net of tax, is included in the condensed consolidated statement of other comprehensive income (loss).

Use of Estimates

Use of Estimates

The preparation of these condensed consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the condensed consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.

Recently Issued Accounting Pronouncements

Recently Issued Accounting Pronouncements

Accounting Pronouncements Adopted in 2018

Revenue from Contracts with Customers

In May 2014, the FASB issued Topic 606, which provides new recognition and disclosure requirements for revenue from contracts with customers that supersedes the existing revenue recognition guidance. The new recognition requirements focus on when the customer obtains control of the goods or services, rather than the current risks and rewards model of recognition. The core principle of the new standard is that an entity will recognize revenue when it transfers goods or services to its customers in an amount that reflects the consideration an entity expects to be entitled to for those goods or services. The new disclosure requirements included in these financial statements contain information intended to communicate the nature, amount, timing and any uncertainty of revenue and cash flows from the applicable contracts, including any significant judgments and changes in judgments and assets recognized from the costs to obtain or fulfill a contract.

We adopted Topic 606 as of January 1, 2018 with retrospective application to January 1, 2016 through December 31, 2017.  See Note 2, Revenue from Contracts with Customers and Note 13, Adjustments to Previously Reported Financial Statements from the Adoption of an Accounting Pronouncement, for further discussion of the adoption of this standard, including the impact on our previously reported financial statements.

Cash Flow Presentation

Cash Flow Presentation

In August 2016, the FASB issued ASU 2016-15, Classification of Certain Cash Receipts and Cash Payments, that clarifies how certain cash receipts and cash payments are presented and classified in the condensed consolidated statements of cash flows.  In addition, in November 2016, the FASB issued ASU 2016-18, Restricted Cash, that requires restricted cash and cash equivalents to be included with the amount of cash and cash equivalents that are reconciled on the condensed consolidated statements of cash flows. We adopted these ASUs as of January 1, 2018 with retrospective application to each period presented.

The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the condensed consolidated balance sheets which total the same such amounts in the condensed consolidated statements of cash flows:

	September 30,		December 31,		September 30,		December 31,
	2018		2017		2017		2016
	(in thousands)
Cash and cash equivalents	$	110,838	$	148,113	$	139,065	$	119,066
Restricted cash		2,845		3,849		3,802		2,259
Restricted cash included within other noncurrent assets		475		475		475		8,538
Total cash, cash equivalents and restricted cash shown in the condensed consolidated statements of cash flows	$	114,158	$	152,437	$	143,342	$	129,863

See Note 13, Adjustments to Previously Reported Financial Statements from the Adoption of an Accounting Pronouncement, for further discussion of the adoption of these standards, including the impact on our previously reported financial statements.  

Income Taxes

Income Taxes

In December 2017, the SEC staff issued Staff Accounting Bulletin 118 (SAB 118), which provides relief for companies that have not completed their accounting for the effects of The Tax Cuts and Jobs Act (Tax Reform Act) but can determine a reasonable estimate of those effects to allow them to include a provisional amount based on their reasonable estimate in their financial statements. The guidance in SAB 118 also allows companies to adjust the provisional amounts during a one-year “measurement period” which is similar to the measurement period used when accounting for business combinations. In the accompanying consolidated financial statements, we have not yet completed our accounting for all the tax effects associated with the enactment of the Tax Reform Act. However, we have, in certain cases made a reasonable estimate of the effects on our existing carryforward attributes and the one-time transition tax. See Note 9, Income Taxes, for further discussion.

Leases

Leases

In February 2016, the FASB issued ASU 2016-02, Leases. ASU 2016-02 is a comprehensive new recognition model for leases requiring a lessee to recognize the asset and liability that arise from leases. For public companies, this new standard is effective for financial statements issued for annual periods beginning after December 16, 2018. Entities may elect to early adopt the lease standard in 2016. In adopting ASU 2016-02, entities are required to recognize and measure leases at the beginning of the earliest period presented using a modified retrospective approach. The modified retrospective approach includes a number of optional practical expedients that entities may elect to apply. In July 2018, the FASB issued ASU 2018-11, Leases: Targeted Improvements, that provides an alternative transition method of adoption, permitting the recognition of a cumulative-effect adjustment to retained earnings on the date of adoption.

We will adopt this new standard on the effective date using the alternative transition method provided by ASU 2018-11 and we are currently evaluating the potential changes from ASU 2018-11 to our future financial reporting and disclosures and designing and implementing related processes and controls.  We expect that the standard will have a material impact on our total assets and liabilities for the addition of right-of-use assets and lease liabilities, but we do not expect it to have a material impact on our results of operations or liquidity.  

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Summary of Operations and Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2018

Accounting Policies [Abstract]

Summary of Warranty Accrual

Warranty accrual at September 30 consisted of the following:

	2018
	(in thousands)
Warranty accrual at beginning of year	$	30,419
Accrual during the period		8,200
Cost of warranty services provided during the period		(3,153	)
Reversal of reserves upon warranty expiration		(2,762	)
Warranty accrual at end of period	$	32,704

Calculation Of Weighted-Average Number Of Common Shares Outstanding

The table below reflects the calculation of the weighted-average number of common shares outstanding, using the treasury stock method, used in computing basic and diluted earnings per common share:

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2018		2017		2018		2017
	(in thousands)
Basic weighted-average shares outstanding		34,419		33,891		34,212		33,789
Effect of dilutive awards		1,863		1,124		1,734		959
Diluted weighted-average shares outstanding		36,282		35,015		35,946		34,748

Reconciliation of Cash, Cash Equivalents and Restricted Cash

The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the condensed consolidated balance sheets which total the same such amounts in the condensed consolidated statements of cash flows:

	September 30,		December 31,		September 30,		December 31,
	2018		2017		2017		2016
	(in thousands)
Cash and cash equivalents	$	110,838	$	148,113	$	139,065	$	119,066
Restricted cash		2,845		3,849		3,802		2,259
Restricted cash included within other noncurrent assets		475		475		475		8,538
Total cash, cash equivalents and restricted cash shown in the condensed consolidated statements of cash flows	$	114,158	$	152,437	$	143,342	$	129,863

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Revenue From Contracts with Customers (Tables)

9 Months Ended

Sep. 30, 2018

Revenue From Contract With Customer [Abstract]

Summary of Disaggregation of Net Sales Revenue by Contract Type for Each of Reportable Segments

The following tables represents the disaggregation of our net sales revenue by contract type for each of our reportable segments (in thousands):

	Three Months Ended September 30, 2018
	U.S.		Asia		Mexico		EMEA		Total
Wind blade sales	$	28,082	$	61,139	$	78,892	$	66,795	$	234,908
Precision molding and    assembly systems sales		775		7,608		89		—		8,472
Transportation sales		6,769		—		—		—		6,769
Other sales		1,063		1,480		584		1,700		4,827
Total net sales	$	36,689	$	70,227	$	79,565	$	68,495	$	254,976

	Nine Months Ended September 30, 2018
	U.S.		Asia		Mexico		EMEA		Total
Wind blade sales	$	100,723	$	196,490	$	190,530	$	187,698	$	675,441
Precision molding and    assembly systems sales		4,997		25,516		1,067		—		31,580
Transportation sales		18,281		—		—		—		18,281
Other sales		3,507		3,822		2,285		4,651		14,265
Total net sales	$	127,508	$	225,828	$	193,882	$	192,349	$	739,567

	Three Months Ended September 30, 2017
	U.S.		Asia		Mexico		EMEA		Total
Wind blade sales	$	41,293	$	96,654	$	59,634	$	40,479	$	238,060
Precision molding and    assembly systems sales		500		4,161		823		—		5,484
Transportation sales		3,376		—		—		—		3,376
Other sales		2,556		2,138		237		1,647		6,578
Total net sales	$	47,725	$	102,953	$	60,694	$	42,126	$	253,498

	Nine Months Ended September 30, 2017
	U.S.		Asia		Mexico		EMEA		Total
Wind blade sales	$	125,831	$	245,633	$	153,302	$	134,752	$	659,518
Precision molding and    assembly systems sales		5,444		11,225		1,612		—		18,281
Transportation sales		9,084		—		—		—		9,084
Other sales		2,948		4,875		3,196		3,793		14,812
Total net sales	$	143,307	$	261,733	$	158,110	$	138,545	$	701,695

Summary of Contract Assets and Contract Liabilities

Contract assets and contract liabilities consisted of the following:

	September 30,			December 31,
	2018			2017			$ Change
	(in thousands)
Gross contract assets	$	137,083		$	112,557		$	24,526
Less: reclassification from contract liabilities		(14,818	)		(6,938	)		(7,880	)
Contract assets	$	122,265		$	105,619		$	16,646

	September 30,			December 31,
	2018			2017			$ Change
	(in thousands)
Gross contract liabilities	$	23,153		$	9,701		$	13,452
Less: reclassification to contract assets		(14,818	)		(6,938	)		(7,880	)
Contract liabilities	$	8,335		$	2,763		$	5,572

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Accounts Receivable (Tables)

9 Months Ended

Sep. 30, 2018

Receivables [Abstract]

Summary of Accounts Receivable

Accounts receivable consisted of the following:

	September 30,		December 31,
	2018		2017
	(in thousands)
Trade accounts receivable	$	112,258	$	117,794
Other accounts receivable		4,808		3,782
Total accounts receivable	$	117,066	$	121,576

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Property, Plant, and Equipment, Net (Tables)

9 Months Ended

Sep. 30, 2018

Property Plant And Equipment [Abstract]

Schedule of Property Plant and Equipment Net

Property, plant and equipment, net consisted of the following:

	September 30,			December 31,
	2018			2017
	(in thousands)
Machinery and equipment	$	113,686		$	100,681
Buildings		15,001			14,711
Leasehold improvements		33,229			21,853
Office equipment and software		21,542			18,664
Furniture		18,703			19,017
Vehicles		287			294
Construction in progress		19,097			10,687
Total		221,545			185,907
Accumulated depreciation		(70,614	)		(62,427	)
Property, plant and equipment, net	$	150,931		$	123,480

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Long-Term Debt, Net of Debt Issuance Costs and Current Maturities (Tables)

9 Months Ended

Sep. 30, 2018

Debt Disclosure [Abstract]

Schedule of Long-Term Debt, Net of Debt Issuance Costs and Current Maturities

Long-term debt, net of debt issuance costs and current maturities, consisted of the following:

	September 30,			December 31,
	2018			2017
	(in thousands)
Senior term loan—U.S.	$	—		$	71,250
Senior revolving loan—U.S.		90,414			2,820
Accounts receivable financing—EMEA		10,185			14,100
Equipment financing—EMEA		13,412			16,901
Equipment capital lease—U.S.		26			536
Equipment capital lease—EMEA		7,404			5,058
Equipment capital lease—Mexico		12,268			12,844
Equipment loan—Mexico		5			47
Total long-term debt		133,714			123,556
Less: Debt issuance costs		(930	)		(2,171	)
Total long-term debt, net of debt issuance costs		132,784			121,385
Less: Current maturities of long-term debt		(39,201	)		(35,506	)
Long-term debt, net of debt issuance costs and current maturities	$	93,583		$	85,879

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Share-Based Compensation Plans (Tables)

9 Months Ended

Sep. 30, 2018

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Schedule of Share Based Compensation Expense Recognized in Condensed Consolidated Statements of Operations

The share-based compensation expense recognized in the condensed consolidated statements of operations was as follows:

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2018		2017		2018		2017
	(in thousands)
Cost of goods sold	$	313	$	210	$	1,268	$	755
General and administrative expenses		1,659		833		5,703		4,039
Total share-based compensation expense	$	1,972	$	1,043	$	6,971	$	4,794

Schedule of Share-based Compensation Arrangements by Share-based Payment Award

The share-based compensation expense recognized by award type was as follows:

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2018		2017		2018		2017
	(in thousands)
RSUs	$	1,112	$	382	$	3,595	$	1,546
Stock options		460		661		2,491		3,248
PSUs		400		-		885		-
Total share-based compensation expense	$	1,972	$	1,043	$	6,971	$	4,794

Summary of Activity for Incentive Plans

The summary of activity under our incentive plans is as follows:

				Stock Options							RSUs					PSUs
	Shares Available for Grant			Shares			Weighted- Average Exercise Price		Options Exercisable		Units			Weighted- Average Grant Date Fair Value		Units			Weighted- Average Grant Date Fair Value
Balance as of December 31, 2017		4,731,117			3,203,290		$	13.34		890,433		613,380		$	15.02		—		$	—
Increase in shares authorized		1,360,826			—			—				—			—		—			—
Granted		(451,212	)		9,652			22.67				149,012			23.37		292,548			22.67
Exercised/vested		—			(186,959	)		11.83				(298,036	)		13.03		—			—
Forfeited/cancelled		115,067			(105,750	)		13.00				(5,053	)		23.04		(4,264	)		22.67
Balance as of September 30, 2018		5,755,798			2,920,233			13.48		1,393,408		459,303			18.93		288,284			22.67

Summary of Outstanding and Exercisable Stock Option Awards

The following table summarizes the outstanding and exercisable stock option awards as of September 30, 2018:

		Options Outstanding						Options Exercisable
Range of Exercise Prices:		Shares		Weighted- Average Remaining Contractual Life (in years)		Weighted- Average Exercise Price		Shares		Weighted- Average Exercise Price
$8.49			16,397		1.8	$	8.49		16,397	$	8.49
$	10.87		1,756,792		6.7		10.87		884,692		10.87
$11.00 to $16.53			624,251		7.3		16.19		291,229		16.34
$17.68 to $18.70			305,241		7.7		18.67		162,142		18.68
$18.77 to $22.67			217,552		9.0		19.92		38,948		20.14
$8.49 to $22.67			2,920,233		7.1		13.48		1,393,408		13.15

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Concentration of Customers (Tables)

9 Months Ended

Sep. 30, 2018

Risks And Uncertainties [Abstract]

Schedule of Revenues from Customers

Revenues from certain customers in excess of 10 percent of our total consolidated revenues are as follows:

	Three Months Ended										Nine Months Ended
	September 30,										September 30,
	2018					2017					2018					2017
Customer	Revenues		% of Total			Revenues		% of Total			Revenues		% of Total			Revenues		% of Total
	(dollars in thousands)
GE	$	81,699		32.0	%	$	98,962		39.0	%	$	244,534		33.1	%	$	297,550		42.4	%
Vestas		73,584		28.9			72,366		28.6			226,153		30.6			181,215		25.8
Nordex Acciona		46,103		18.1			43,052		17.0			141,663		19.1			126,214		18.0
Siemens Gamesa		33,964		13.3			34,999		13.8			84,782		11.5			86,675		12.4
Other		19,626		7.7			4,119		1.6			42,435		5.7			10,041		1.4
Total	$	254,976		100.0	%	$	253,498		100.0	%	$	739,567		100.0	%	$	701,695		100.0	%

Schedule of Trade Accounts Receivable from Certain Customers

Trade accounts receivable from certain customers in excess of 10 percent of our total consolidated trade accounts receivable are as follows:

	September 30,			December 31,
	2018			2017
Customer	% of Total			% of Total
GE		9.5	%		18.9	%
Vestas		41.1	%		52.4	%
Nordex Acciona		34.6	%		19.5	%

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Segment Reporting (Tables)

9 Months Ended

Sep. 30, 2018

Segment Reporting [Abstract]

Schedule of Segment Information

The following tables set forth certain information regarding each of our segments:

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2018			2017			2018			2017
	(in thousands)
Revenues by segment:
U.S.	$	36,689		$	47,725		$	127,508		$	143,307
Asia		70,227			102,953			225,828			261,733
Mexico		79,565			60,694			193,882			158,110
EMEA		68,495			42,126			192,349			138,545
Total revenues	$	254,976		$	253,498		$	739,567		$	701,695
Revenues by geographic location (1):
U.S.	$	36,689		$	47,725		$	127,508		$	143,307
China		70,227			102,953			225,828			261,733
Mexico		79,565			60,694			193,882			158,110
Turkey		68,495			42,126			192,349			138,545
Total revenues	$	254,976		$	253,498		$	739,567		$	701,695
Income (loss) from operations:
U.S. (2)	$	(18,687	)	$	(7,474	)	$	(41,030	)	$	(21,148	)
Asia		7,401			22,104			23,204			55,452
Mexico		5,447			4,883			9,932			8,917
EMEA		13,050			1,478			36,262			8,555
Total income from operations	$	7,211		$	20,991		$	28,368		$	51,776

	September 30,		December 31,
	2018		2017
	(in thousands)
Property, plant and equipment, net:
U.S.	$	34,865	$	24,575
Asia (China)		30,345		28,887
Mexico		63,269		39,756
EMEA (Turkey)		22,452		30,262
Total property, plant and equipment, net	$	150,931	$	123,480

(1) Revenues are attributable to countries based on the location where the product is manufactured or the services are performed.

(2) The losses from operations in our U.S. segment includes corporate general and administrative costs of $9.8 million and $9.3 million for the three months ended September 30, 2018 and 2017, respectively, and $31.9 million and $28.4 million for the nine months ended September 30, 2018 and 2017.

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Adjustments to Previously Reported Financial Statements from the Adoption of an Accounting Pronouncement (Tables)

9 Months Ended

Sep. 30, 2018

New Accounting Pronouncements And Changes In Accounting Principles [Abstract]

Summary of Effects of Adopting Topic 606 and ASU 2016-18 on Previously Reported Financial Statements

The following tables summarize the effects of adopting Topic 606 and ASU 2016-18 had on our previously reported financial statements.

Condensed Consolidated Balance Sheet

(In thousands, except par value data)

	December 31, 2017
	As Reported			Adoption of Topic 606			As Adjusted
	(Unaudited)
Assets
Current assets:
Cash and cash equivalents	$	148,113		$	—		$	148,113
Restricted cash		3,849			—			3,849
Accounts receivable		121,576			—			121,576
Contract assets		—			105,619			105,619
Inventories		67,064			(62,952	)		4,112
Inventories held for customer orders		64,858			(64,858	)		—
Prepaid expenses and other current assets		27,507			—			27,507
Total current assets		432,967			(22,191	)		410,776
Property, plant, and equipment, net		123,480			—			123,480
Goodwill		2,807			—			2,807
Intangible assets, net		150			958			1,108
Other noncurrent assets		14,130			4,261			18,391
Total assets	$	573,534		$	(16,972	)	$	556,562
Liabilities and Stockholders’ Equity
Current liabilities:
Accounts payable and accrued expenses	$	166,743		$	—		$	166,743
Accrued warranty		29,163			1,256			30,419
Deferred revenue		81,048			(81,048	)		—
Customer deposits		10,134			(9,702	)		432
Current maturities of long-term debt		35,506			—			35,506
Contract liabilities		—			2,763			2,763
Total current liabilities		322,594			(86,731	)		235,863
Long-term debt, net of debt issuance costs and current maturities		85,879			—			85,879
Other noncurrent liabilities		4,444			494			4,938
Total liabilities		412,917			(86,237	)		326,680
Commitments and contingencies
Stockholders’ equity:
Common shares, $0.01 par value, 100,000 shares authorized and 34,049    shares issued and 34,021 shares outstanding at December 31, 2017		340			—			340
Paid-in capital		301,543			—			301,543
Accumulated other comprehensive loss		(558	)		—			(558	)
Accumulated deficit		(140,197	)		69,265			(70,932	)
Treasury stock, at cost, 28 shares at December 31, 2017		(511	)		—			(511	)
Total stockholders’ equity		160,617			69,265			229,882
Total liabilities and stockholders’ equity	$	573,534		$	(16,972	)	$	556,562

The primary effects of the adoption of Topic 606 on our condensed consolidated balance sheet include 1) amounts being recognized as revenue for work performed as production takes place over time as contract assets, which differs from the prior practice of including the balances in inventory; 2) no longer reporting inventory held for customer orders or deferred revenue since revenue is now being recognized over the course of the production process, and before the product is delivered to the customer; 3) that contract liabilities are reported for amounts collected from customers in advance of the production of products, similar to our prior practice of recording customer deposits; and 4) the cumulative amount of the effect to prior periods’ net income related to the adoption of Topic 606 through December 31, 2017 is reflected in retained earnings.

Condensed Consolidated Income Statement

(In thousands, except per share data)

	Three Months Ended
	September 30, 2017
	As Reported			Adoption of Topic 606			As Adjusted
	(Unaudited)
Net sales	$	243,354		$	10,144		$	253,498
Cost of sales		198,141			12,699			210,840
Startup and transition costs		12,352			—			12,352
Total cost of goods sold		210,493			12,699			223,192
Gross profit		32,861			(2,555	)		30,306
General and administrative expenses		9,315			—			9,315
Income from operations		23,546			(2,555	)		20,991
Other income (expense):
Interest income		48			—			48
Interest expense		(3,254	)		—			(3,254	)
Realized gain on foreign currency remeasurement		39			—			39
Miscellaneous income		390			—			390
Total other expense		(2,777	)		—			(2,777	)
Income before income taxes		20,769			(2,555	)		18,214
Income tax benefit (provision)		(371	)		3,894			3,523
Net income	$	20,398		$	1,339		$	21,737
Weighted-average common shares outstanding:
Basic		33,891			33,891			33,891
Diluted		35,015			35,015			35,015
Net income per common share:
Basic	$	0.60		$	0.04		$	0.64
Diluted	$	0.58		$	0.04		$	0.62

The primary effects of the adoption of Topic 606 on our condensed consolidated income statement relate to amounts being recognized as revenue for work performed as production takes place over time, which differs from the prior practice of recognizing revenue when the product was delivered to the customer.

Condensed Consolidated Income Statement

(In thousands, except per share data)

	Nine Months Ended
	September 30, 2017
	As Reported			Adoption of Topic 606			As Adjusted
	(Unaudited)
Net sales	$	683,142		$	18,553		$	701,695
Cost of sales		568,659			23,836			592,495
Startup and transition costs		29,051			—			29,051
Total cost of goods sold		597,710			23,836			621,546
Gross profit		85,432			(5,283	)		80,149
General and administrative expenses		28,373			—			28,373
Income from operations		57,059			(5,283	)		51,776
Other income (expense):
Interest income		78			—			78
Interest expense		(9,215	)		—			(9,215	)
Realized loss on foreign currency remeasurement		(2,575	)		—			(2,575	)
Miscellaneous income		968			—			968
Total other expense		(10,744	)		—			(10,744	)
Income before income taxes		46,315			(5,283	)		41,032
Income tax provision		(8,514	)		4,009			(4,505	)
Net income	$	37,801		$	(1,274	)	$	36,527
Weighted-average common shares outstanding:
Basic		33,789			33,789			33,789
Diluted		34,748			34,748			34,748
Net income per common share:
Basic	$	1.12		$	(0.04	)	$	1.08
Diluted	$	1.09		$	(0.04	)	$	1.05

The primary effects of the adoption of Topic 606 on our condensed consolidated income statement relate to amounts being recognized as revenue for work performed as production takes place over time, which differs from the prior practice of recognizing revenue when the product was delivered to the customer.

Condensed Consolidated Statement of Comprehensive Income

(In thousands)

	Three Months Ended
	September 30, 2017
	As Reported		Adoption of Topic 606		As Adjusted
	(Unaudited)
Net income	$	20,398	$	1,339	$	21,737
Other comprehensive income:
Foreign currency translation adjustments		1,231		—		1,231
Comprehensive income	$	21,629	$	1,339	$	22,968

	Nine Months Ended
	September 30, 2017
	As Reported		Adoption of Topic 606			As Adjusted
	(Unaudited)
Net income	$	37,801	$	(1,274	)	$	36,527
Other comprehensive income:
Foreign currency translation adjustments		2,808		—			2,808
Comprehensive income	$	40,609	$	(1,274	)	$	39,335

Condensed Consolidated Statements of Changes in Stockholders’ Equity

(In thousands)

	Common				Paid-in		Accumulated other comprehensive			Accumulated			Treasury stock,			Total stockholders'
	Shares		Amount		capital		loss			deficit			at cost			equity
	(Unaudited)
Balance at December 31, 2017 - as reported		34,049	$	340	$	301,543	$	(558	)	$	(140,197	)	$	(511	)	$	160,617
Cumulative effect of the adoption of Topic 606		—		—		—		—			69,265			—			69,265
Balance at December 31, 2017 - as adjusted		34,049	$	340	$	301,543	$	(558	)	$	(70,932	)	$	(511	)	$	229,882

The adoption of Topic 606 increased our total stockholders’ equity in 2015 and 2016 by $61.2 million and $12.3 million, respectively and decreased our total stockholders’ equity in 2017 by $4.2 million.

Condensed Consolidated Statements of Cash Flows

(In thousands)

	Nine Months Ended
	September 30, 2017
	As Reported			Adoption of Topic 606			Adoption of ASU 2016-18			As Adjusted
	(Unaudited)
Cash flows from operating activities:
Net income	$	37,801		$	(1,274	)	$	—		$	36,527
Adjustments to reconcile net income to net cash    provided by operating activities:
Depreciation and amortization		13,622			521			—			14,143
Share-based compensation expense		4,794			—			—			4,794
Amortization of debt issuance costs		430			—			—			430
Deferred income taxes		—			(2,613	)		—			(2,613	)
Changes in assets and liabilities:
Accounts receivable		(66,438	)		—			—			(66,438	)
Contract assets and liabilities		—			7,604			—			7,604
Inventories		(24,979	)		24,644			—			(335	)
Prepaid expenses and other current assets		881			—			—			881
Other noncurrent assets		3,067			(2,619	)		(8,063	)		(7,615	)
Accounts payable and accrued expenses		47,498			585			—			48,083
Accrued warranty		8,238			(103	)		—			8,135
Customer deposits		9,019			(9,019	)		—			—
Deferred revenue		17,726			(17,726	)		—			—
Other noncurrent liabilities		(136	)		—			—			(136	)
Net cash provided by operating activities		51,523			—			(8,063	)		43,460
Cash flows from investing activities:
Purchase of property and equipment		(35,312	)		—			—			(35,312	)
Net cash used in investing activities		(35,312	)		—			—			(35,312	)
Cash flows from financing activities:
Repayments of term loan		(2,812	)		—			—			(2,812	)
Net proceeds from accounts receivable financing		8,196			—			—			8,196
Proceeds from working capital loans		6,620			—			—			6,620
Repayments of working capital loans		(11,258	)		—			—			(11,258	)
Net proceeds from other debt		4,556			—			—			4,556
Proceeds from exercise of stock options		988			—			—			988
Repurchase of common stock including shares withheld in lieu of income taxes		(1,264	)		—			—			(1,264	)
Restricted cash		(1,543	)		—			1,543			—
Net cash provided by financing activities		3,483			—			1,543			5,026
Impact of foreign exchange rates on cash and cash    equivalents		305			—			—			305
Net change in cash and cash equivalents		19,999			—			(6,520	)		13,479
Cash, cash equivalents and restricted cash, beginning of year		119,066			—			10,797			129,863
Cash, cash equivalents and restricted cash, end of period	$	139,065		$	—		$	4,277		$	143,342

XML

Summary of Operations and Significant Accounting Policies - Public Offerings and Stock Split - Additional Information (Detail)	1 Months Ended
	May 31, 2017 USD ($) $ / shares shares	Jul. 31, 2016 USD ($) $ / shares shares
Initial Public Offering [Member]
Operations And Summary Of Significant Accounting Policies [Line Items]
Public offering shares		7,187,500
Share price | $ / shares		$ 11.00
Net proceeds from Initial public offering | $		$ 67,200,000
Initial Public Offering [Member] | Subordinated Convertible Promissory Notes [Member]
Operations And Summary Of Significant Accounting Policies [Line Items]
Share price | $ / shares		$ 11.00
Debt instrument convertible number of equity shares		1,079,749
Initial Public Offering [Member] | Common Stock Warrants [Member]
Operations And Summary Of Significant Accounting Policies [Line Items]
Number of common stock issue on conversion of preferred share		120,923
Initial Public Offering [Member] | Redeemable Preferred Shares [Member]
Operations And Summary Of Significant Accounting Policies [Line Items]
Number of common stock issue on conversion of preferred share		21,110,204
Initial Public Offering [Member] | Investors, Non-employee Director and Executive Officers [Member]
Operations And Summary Of Significant Accounting Policies [Line Items]
Public offering shares		1,250,000
Underwriters Over-allotment Option [Member]
Operations And Summary Of Significant Accounting Policies [Line Items]
Public offering shares		937,500
Underwriters Over-allotment Option [Member] | Existing Shareholders and Executive Officers [Member]
Operations And Summary Of Significant Accounting Policies [Line Items]
Public offering shares	575,000
Initial Public Offering and Stock Split [Member]
Operations And Summary Of Significant Accounting Policies [Line Items]
Conversion of convertible promissory notes | $		$ 11,900,000
Prior to IPO [Member]
Operations And Summary Of Significant Accounting Policies [Line Items]
Common stock forward stock split ratio		360
Secondary Public Offering [Member]
Operations And Summary Of Significant Accounting Policies [Line Items]
Public offering shares	0
Net proceeds from secondary public offering to selling shareholders | $	$ 78,800,000
Proceeds from secondary public offering | $	0
Secondary Public Offering [Member] | General and Administrative Costs [Member]
Operations And Summary Of Significant Accounting Policies [Line Items]
Offering costs paid | $	$ 800,000
Secondary Public Offering [Member] | Existing Shareholders and Executive Officers [Member]
Operations And Summary Of Significant Accounting Policies [Line Items]
Public offering shares	5,075,000
Share price | $ / shares	$ 16.35

XML

Summary of Operations and Significant Accounting Policies - Basis of Presentation - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2018 Segment Facility
Operations And Summary Of Significant Accounting Policies [Line Items]
Number of operating segments | Segment	4
Mexico [Member]
Operations And Summary Of Significant Accounting Policies [Line Items]
Number of manufacturing facilities	3
EMEA [Member]
Operations And Summary Of Significant Accounting Policies [Line Items]
Number of manufacturing facilities	2
Asia Segment [Member] | Dafeng [Member]
Operations And Summary Of Significant Accounting Policies [Line Items]
Number of manufacturing facilities	2

XML

Summary of Operations and Significant Accounting Policies - Warranty Expense - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2018
Minimum [Member]
Operations And Summary Of Significant Accounting Policies [Line Items]
Limited warranty period	2 years
Maximum [Member]
Operations And Summary Of Significant Accounting Policies [Line Items]
Limited warranty period	5 years

XML

Summary of Operations and Significant Accounting Policies - Summary of Warranty Accrual (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2018 USD ($)
Product Warranties Disclosures [Abstract]
Warranty accrual at beginning of year	$ 30,419
Accrual during the period	8,200
Cost of warranty services provided during the period	(3,153)
Reversal of reserves upon warranty expiration	(2,762)
Warranty accrual at end of period	$ 32,704

XML

Summary of Operations and Significant Accounting Policies - Calculation Of Weighted-Average Number Of Common Shares Outstanding (Detail) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Earnings Per Share [Abstract]
Basic weighted-average shares outstanding	34,419	33,891	34,212	33,789
Effect of dilutive awards	1,863	1,124	1,734	959
Diluted weighted-average shares outstanding	36,282	35,015	35,946	34,748

XML

Summary of Operations and Significant Accounting Policies - Net Income Per Common Share Calculation - Additional Information (Detail) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Operations And Summary Of Significant Accounting Policies [Line Items]
Anti-dilutive shares excluded from computation of diluted net income per share		0		0
Share-Based Compensation Awards [Member]
Operations And Summary Of Significant Accounting Policies [Line Items]
Anti-dilutive shares excluded from computation of diluted net income per share	7,000		63,000

XML

Summary of Operations and Significant Accounting Policies - Financial Instruments - Additional Information (Detail) $ in Thousands, ₺ in Millions	1 Months Ended			3 Months Ended		9 Months Ended
	Aug. 31, 2018 USD ($)	Aug. 31, 2018 TRY (₺)	Apr. 30, 2018 USD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2017 USD ($)
Operations And Summary Of Significant Accounting Policies [Line Items]
Unrealized gain (loss), net of tax				$ 297		$ 489
Intercompany loan to subsidiary	$ 15,000	₺ 96.6
Realized loss on foreign currency remeasurement				(15,621)	$ 1,231	(21,908)	$ 2,808
Forward Contracts [Member]
Operations And Summary Of Significant Accounting Policies [Line Items]
Derivative notional amount | ₺		₺ 101.5
Derivative maturity month and year	2018-10	2018-10
Unrealized gain (loss), net of tax				(100)		(100)
Settlement of intercompany loan to reduce currency fluctuation | ₺		₺ 96.6
Settlement of accrued interest to reduce currency fluctuation | ₺		₺ 4.9
Settlement value of swap				1,200		1,200
Realized loss on foreign currency remeasurement				(1,100)		(1,100)
LIBOR [Member]
Operations And Summary Of Significant Accounting Policies [Line Items]
Derivative future variable rate interest expense			$ 75,400
Interest Rate Swap Arrangement [Member]
Operations And Summary Of Significant Accounting Policies [Line Items]
Derivative notional amount			$ 75,000
Derivative maturity month and year			2023-04
Derivative, effective hedges amount			$ 75,000
Settlement value of swap				$ 700		700
Unrealized gain (loss), net of tax						$ 600

XML

Summary of Operations and Significant Accounting Policies - Reconciliation of Cash, Cash Equivalents and Restricted Cash (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017	Dec. 31, 2016
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Cash and cash equivalents	$ 110,838	$ 148,113
Restricted cash	2,845	3,849
ASU 2016-15 [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Cash and cash equivalents	110,838	148,113	$ 139,065	$ 119,066
Restricted cash	2,845	3,849	3,802	2,259
Restricted cash included within other noncurrent assets	475	475	475	8,538
Total cash, cash equivalents and restricted cash shown in the condensed consolidated statements of cash flows	$ 114,158	$ 152,437	$ 143,342	$ 129,863

XML

Revenue From Contracts with Customers - Summary of Disaggregation of Net Sales Revenue by Contract Type for Each of Reportable Segments (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Disaggregation Of Revenue [Line Items]
Net sales revenue	$ 254,976	$ 253,498	$ 739,567	$ 701,695
Wind Blades [Member]
Disaggregation Of Revenue [Line Items]
Net sales revenue	234,908	238,060	675,441	659,518
Precision Molding and Assembly Systems [Member]
Disaggregation Of Revenue [Line Items]
Net sales revenue	8,472	5,484	31,580	18,281
Transportation [Member]
Disaggregation Of Revenue [Line Items]
Net sales revenue	6,769	3,376	18,281	9,084
Other [Member]
Disaggregation Of Revenue [Line Items]
Net sales revenue	4,827	6,578	14,265	14,812
U.S. Segment [Member]
Disaggregation Of Revenue [Line Items]
Net sales revenue	36,689	47,725	127,508	143,307
U.S. Segment [Member] | Wind Blades [Member]
Disaggregation Of Revenue [Line Items]
Net sales revenue	28,082	41,293	100,723	125,831
U.S. Segment [Member] | Precision Molding and Assembly Systems [Member]
Disaggregation Of Revenue [Line Items]
Net sales revenue	775	500	4,997	5,444
U.S. Segment [Member] | Transportation [Member]
Disaggregation Of Revenue [Line Items]
Net sales revenue	6,769	3,376	18,281	9,084
U.S. Segment [Member] | Other [Member]
Disaggregation Of Revenue [Line Items]
Net sales revenue	1,063	2,556	3,507	2,948
Asia Segment [Member]
Disaggregation Of Revenue [Line Items]
Net sales revenue	70,227	102,953	225,828	261,733
Asia Segment [Member] | Wind Blades [Member]
Disaggregation Of Revenue [Line Items]
Net sales revenue	61,139	96,654	196,490	245,633
Asia Segment [Member] | Precision Molding and Assembly Systems [Member]
Disaggregation Of Revenue [Line Items]
Net sales revenue	7,608	4,161	25,516	11,225
Asia Segment [Member] | Other [Member]
Disaggregation Of Revenue [Line Items]
Net sales revenue	1,480	2,138	3,822	4,875
Mexico Segment [Member]
Disaggregation Of Revenue [Line Items]
Net sales revenue	79,565	60,694	193,882	158,110
Mexico Segment [Member] | Wind Blades [Member]
Disaggregation Of Revenue [Line Items]
Net sales revenue	78,892	59,634	190,530	153,302
Mexico Segment [Member] | Precision Molding and Assembly Systems [Member]
Disaggregation Of Revenue [Line Items]
Net sales revenue	89	823	1,067	1,612
Mexico Segment [Member] | Other [Member]
Disaggregation Of Revenue [Line Items]
Net sales revenue	584	237	2,285	3,196
EMEA Segment [Member]
Disaggregation Of Revenue [Line Items]
Net sales revenue	68,495	42,126	192,349	138,545
EMEA Segment [Member] | Wind Blades [Member]
Disaggregation Of Revenue [Line Items]
Net sales revenue	66,795	40,479	187,698	134,752
EMEA Segment [Member] | Other [Member]
Disaggregation Of Revenue [Line Items]
Net sales revenue	$ 1,700	$ 1,647	$ 4,651	$ 3,793

XML

Revenue From Contracts with Customers - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2018	Dec. 31, 2017
Revenue from Contracts with Customers
Increase in contracts assets		$ 16,646
Increase in contracts liabilities		5,572
Contract liability revenue recognized	$ 0	2,800
Net revenue recognized from performance obligations satisfied in previous periods, decrease amount	3,900	7,900
Transaction price allocated to remaining performance obligations	5,600,000	$ 5,600,000
Estimate to recognize remaining performance obligations as revenue, percent in remainder of 2018		5.00%
Estimate to recognize remaining performance obligations as revenue, percent in 2019		27.00%
Estimate to recognize remaining performance obligations as revenue, percent in 2020		27.00%
Estimate to recognize remaining performance obligations as revenue, percent in 2021		17.00%
Estimate to recognize remaining performance obligations as revenue, percent in 2022		14.00%
Estimate to recognize remaining performance obligations as revenue, percent in 2023		10.00%
Revenue, practical expedient, incremental cost of obtaining contract		true
Other Noncurrent Assets [Member]
Revenue from Contracts with Customers
Capitalized contract cost	4,800	$ 4,800	$ 2,400
Capitalized contract cost, accumulated amortization	$ 1,700	$ 1,700	$ 1,400
Minimum [Member]
Revenue from Contracts with Customers
Production hours of single blade		24 hours
Production time of mold		3 months
Maximum [Member]
Revenue from Contracts with Customers
Production hours of single blade		36 hours
Production time of mold		6 months
Long-term Contract with Customer [Member] | Net Sales, Directly to Consumer [Member]
Revenue from Contracts with Customers
Contracts with customer, length		5 years

XML

Revenue From Contracts with Customers - Summary of Contract Assets (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Revenue From Contract With Customer [Abstract]
Gross contract assets	$ 137,083	$ 112,557
Less: reclassification from contract liabilities	(14,818)	(6,938)
Contract assets	122,265	$ 105,619
Gross contract assets, Change	24,526
Less: reclassification from contract liabilities, Change	(7,880)
Contract assets, Change	$ 16,646

XML

Revenue From Contracts with Customers - Summary of Contract Liabilities (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Revenue From Contract With Customer [Abstract]
Gross contract liabilities	$ 23,153	$ 9,701
Less: reclassification to contract assets	(14,818)	(6,938)
Contract liabilities	8,335	$ 2,763
Gross contract liabilities, Change	13,452
Less: reclassification to contract assets, Change	(7,880)
Contract liabilities, Change	$ 5,572

XML

Significant Risks and Uncertainties - Additional Information (Detail) - USD ($)	Sep. 30, 2018	Dec. 31, 2017
Concentration Risk [Line Items]
Cash in short-term deposits in interest bearing accounts	$ 2,845,000	$ 3,849,000
U.S. [Member]
Concentration Risk [Line Items]
Cash in deposit accounts	70,600,000	98,900,000
China [Member]
Concentration Risk [Line Items]
Cash in deposit accounts	29,600,000
Cash in short-term deposits in interest bearing accounts	2,800,000
Turkey [Member]
Concentration Risk [Line Items]
Cash in deposit accounts	8,600,000
Mexico [Member]
Concentration Risk [Line Items]
Cash in deposit accounts	2,000,000
Iowa [Member]
Concentration Risk [Line Items]
Cash in long term deposits in interest bearing accounts	500,000
Maximum [Member]
Concentration Risk [Line Items]
Cash deposit insured amount	$ 250,000	$ 250,000

XML

Related-Party Transactions - Additional Information (Detail) $ / shares in Units, $ in Millions	1 Months Ended		6 Months Ended	9 Months Ended
	May 31, 2017 $ / shares shares	Jul. 31, 2016 $ / shares shares	Jun. 30, 2017 USD ($)	Sep. 30, 2018 Agreement	Dec. 31, 2017 Agreement
Initial Public Offering [Member]
Related Party Transaction [Line Items]
Public offering shares		7,187,500
Share price | $ / shares		$ 11.00
Secondary Public Offering [Member]
Related Party Transaction [Line Items]
Public offering shares	0
Investor, Executive Officers and Director [Member] | Initial Public Offering [Member]
Related Party Transaction [Line Items]
Public offering shares		1,250,000
Subordinated Convertible Promissory Notes [Member] | Initial Public Offering [Member]
Related Party Transaction [Line Items]
Debt instrument convertible number of equity shares		1,079,749
Share price | $ / shares		$ 11.00
GE [Member]
Related Party Transaction [Line Items]
Number of supply agreements | Agreement				5
Proceeds from sales | $			$ 198.6
GE [Member] | Agreements in Taicang Port and Izmir [Member]
Related Party Transaction [Line Items]
Agreement expiration date				Dec. 31, 2017
Number of agreements not extended | Agreement					2
GE [Member] | Maximum [Member]
Related Party Transaction [Line Items]
Percentage of common stock outstanding			5.00%
Certain Entities Associated with Element Partners, Angeleno Group Landmark Partners and NGP Energy Technology Partners, L.P and Certain Executive Officers [Member] | Secondary Public Offering [Member]
Related Party Transaction [Line Items]
Public offering shares	5,075,000
Share price | $ / shares	$ 16.35

XML

Accounts Receivable - Summary of Accounts Receivable (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total accounts receivable	$ 117,066	$ 121,576
Trade Accounts Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total accounts receivable	112,258	117,794
Other Accounts Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total accounts receivable	$ 4,808	$ 3,782

XML

Property, Plant, and Equipment, Net - Schedule of Property Plant and Equipment Net (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 221,545	$ 185,907
Accumulated depreciation	(70,614)	(62,427)
Property, plant and equipment, net	150,931	123,480
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	113,686	100,681
Buildings [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	15,001	14,711
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	33,229	21,853
Office Equipment and Software [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	21,542	18,664
Furniture [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	18,703	19,017
Vehicles [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	287	294
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 19,097	$ 10,687

XML

Property, Plant, and Equipment, Net - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Property Plant And Equipment [Abstract]
Total depreciation expense	$ 5.8	$ 5.1	$ 18.6	$ 13.5

XML

Long-Term Debt, Net of Debt Issuance Costs and Current Maturities - Schedule of Long-Term Debt, Net of Debt Issuance Costs and Current Maturities (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Total long-term debt
Total long-term debt	$ 133,714	$ 123,556
Less: Debt issuance costs	(930)	(2,171)
Total long-term debt, net of debt issuance costs	132,784	121,385
Less: Current maturities of long-term debt	(39,201)	(35,506)
Long-term debt, net of debt issuance costs and current maturities	93,583	85,879
Senior Term Loan [Member] | U.S. [Member]
Total long-term debt
Total long-term debt		71,250
Senior Revolving Loan [Member] | U.S. [Member]
Total long-term debt
Total long-term debt	90,414	2,820
Accounts Receivable Financing [Member] | EMEA [Member]
Total long-term debt
Total long-term debt	10,185	14,100
Equipment Financing [Member] | EMEA [Member]
Total long-term debt
Total long-term debt	13,412	16,901
Equipment Capital Lease [Member] | U.S. [Member]
Total long-term debt
Total long-term debt	26	536
Equipment Capital Lease [Member] | EMEA [Member]
Total long-term debt
Total long-term debt	7,404	5,058
Equipment Capital Lease [Member] | Mexico [Member]
Total long-term debt
Total long-term debt	12,268	12,844
Equipment Loan [Member] | Mexico [Member]
Total long-term debt
Total long-term debt	$ 5	$ 47

XML

Long-Term Debt, Net of Debt Issuance Costs and Current Maturities - Additional Information (Detail)	1 Months Ended		9 Months Ended
	Aug. 31, 2018 USD ($)	Apr. 30, 2018 USD ($) Lender	Sep. 30, 2018
Debt Instrument [Line Items]
Number of lenders | Lender		4
Debt instrument, maturity month and year		2023-04
Debt instrument frequency of periodic payment			monthly
Debt instrument, payment terms			Interest is paid monthly and we are not obligated to make any principal repayments prior to the maturity date so long as we are not in default under the Credit Agreement. We may prepay borrowings without penalty under the Credit Agreement.
Credit Agreement [Member]
Debt Instrument [Line Items]
Additional borrowed amount	$ 15,000,000
Interest Rate Swap Arrangement [Member]
Debt Instrument [Line Items]
Derivative notional amount		$ 75,000,000
Derivative effective rate		4.20%
Derivative term		5 years
LIBOR [Member]
Debt Instrument [Line Items]
Debt instrument, variable interest rate		1.50%	3.70%
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Credit facility, amount		$ 150,000,000
Proceeds from Lines of Credit		75,400,000
Letter of Credit [Member]
Debt Instrument [Line Items]
Credit facility, amount		$ 25,000,000

XML

Share-Based Compensation Plans - Additional Information (Detail) $ in Millions	9 Months Ended
	Sep. 30, 2018 USD ($) shares
Timed-Based Restricted Stock Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation plans, shares issued	149,012
Performance-Based Restricted Stock Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation plans, shares issued	121,836
Performance-Based Restricted Stock Units [Member] | Certain Stock Price Hurdles [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation plans, shares issued	170,712
Restricted Stock Units (RSUs) [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation plans, shares issued	149,012
Unamortized amount of share-based compensation expense | $	$ 4.8
Unrecognized cost expects to recognize, weighted-average period	1 year 8 months 12 days
Fair value of awards vested during period | $	$ 3.9
Shares repurchased for awards	100,891
Shares repurchased for tax withholding requirements, value | $	$ 2.9
Performance-based Restricted Stock Units (PSUs) [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation plans, shares issued	292,548
Unamortized amount of share-based compensation expense | $	$ 3.9
Unrecognized cost expects to recognize, weighted-average period	2 years 6 months
Stock Options [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized cost expects to recognize, weighted-average period	1 year 6 months
Total unrecognized cost related to non-vested stock option awards | $	$ 2.3

XML

Share-Based Compensation Plans - Schedule of Share Based Compensation Expense Recognized in Condensed Consolidated Statements of Operations (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total share-based compensation expense	$ 1,972	$ 1,043	$ 6,971	$ 4,794
Cost of Goods Sold [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total share-based compensation expense	313	210	1,268	755
General and Administrative Costs [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total share-based compensation expense	$ 1,659	$ 833	$ 5,703	$ 4,039

XML

Share-Based Compensation Plans - Schedule of Share-based Compensation Arrangements by Share-based Payment Award (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total share-based compensation expense	$ 1,972	$ 1,043	$ 6,971	$ 4,794
Restricted Stock Units (RSUs) [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total share-based compensation expense	1,112	382	3,595	1,546
Stock Options [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total share-based compensation expense	460	$ 661	2,491	$ 3,248
Performance-based Restricted Stock Units (PSUs) [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total share-based compensation expense	$ 400		$ 885

XML

Share-Based Compensation Plans - Summary of Activity for Incentive Plans (Detail)	9 Months Ended
	Sep. 30, 2018 $ / shares shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock Options, Shares Available for Grant, Beginning balance	4,731,117
Stock Options, Shares Available for Grant, Increase in shares authorized	1,360,826
Stock Options, Shares Available for Grant, Granted	(451,212)
Stock Options, Shares Available for Grant, Exercised/vested	0
Stock Options, Shares Available for Grant, Forfeited/cancelled	115,067
Stock Options, Shares Available for Grant, Ending balance	5,755,798
Stock Options, Shares, Beginning balance	3,203,290
Stock Options, Shares, Increase in shares authorized	0
Stock Options, Shares, Granted	9,652
Stock Options, Shares, Exercised/vested	(186,959)
Stock Options, Shares, Forfeited/cancelled	(105,750)
Stock Options, Shares, Ending balance	2,920,233
Stock Options, Weighted-Average Exercise Price, Beginning balance | $ / shares	$ 13.34
Stock Options, Weighted-Average Exercise Price, Increase in shares authorized | $ / shares	0
Stock Options, Weighted-Average Exercise Price, Granted | $ / shares	22.67
Stock Options, Weighted-Average Exercise Price, Exercised/vested | $ / shares	11.83
Stock Options, Weighted-Average Exercise Price, Forfeited/cancelled | $ / shares	13.00
Stock Options, Weighted-Average Exercise Price, Ending balance | $ / shares	$ 13.48
Stock Options, Options Exercisable, Beginning balance	890,433
Stock Options, Options Exercisable, Ending balance	1,393,408
Restricted Stock Units (RSUs) [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Units, Beginning balance	613,380
Units, Increase in shares authorized	0
Units, Granted	149,012
Units, Exercised/vested	(298,036)
Units, Forfeited/cancelled	(5,053)
Units, Ending balance	459,303
Weighted-Average Grant Date Fair Value, Beginning balance | $ / shares	$ 15.02
Weighted-Average Grant Date Fair Value, Increase in shares authorized | $ / shares	0
Weighted-Average Grant Date Fair Value, Granted | $ / shares	23.37
Weighted-Average Grant Date Fair Value, Exercised/vested | $ / shares	13.03
Weighted-Average Grant Date Fair Value, Forfeited/cancelled | $ / shares	23.04
Weighted-Average Grant Date Fair Value, Ending balance | $ / shares	$ 18.93
Performance-based Restricted Stock Units (PSUs) [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Units, Beginning balance	0
Units, Increase in shares authorized	0
Units, Granted	292,548
Units, Exercised/vested	0
Units, Forfeited/cancelled	(4,264)
Units, Ending balance	288,284
Weighted-Average Grant Date Fair Value, Beginning balance | $ / shares	$ 0
Weighted-Average Grant Date Fair Value, Increase in shares authorized | $ / shares	0
Weighted-Average Grant Date Fair Value, Granted | $ / shares	22.67
Weighted-Average Grant Date Fair Value, Exercised/vested | $ / shares	0
Weighted-Average Grant Date Fair Value, Forfeited/cancelled | $ / shares	22.67
Weighted-Average Grant Date Fair Value, Ending balance | $ / shares	$ 22.67

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Share-Based Compensation Plans - Summary of Outstanding and Exercisable Stock Option Awards (Detail)	9 Months Ended
	Sep. 30, 2018 $ / shares shares
Range One [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Minimum	$ 8.49
Options Outstanding, Shares | shares	16,397
Options Outstanding, Weighted-Average Remaining Contractual Life (in years)	1 year 9 months 18 days
Options Outstanding, Weighted-Average Exercise Price	$ 8.49
Options Exercisable, Shares | shares	16,397
Options Exercisable, Weighted-Average Exercise Price	$ 8.49
Range Two [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Minimum	$ 10.87
Options Outstanding, Shares | shares	1,756,792
Options Outstanding, Weighted-Average Remaining Contractual Life (in years)	6 years 8 months 12 days
Options Outstanding, Weighted-Average Exercise Price	$ 10.87
Options Exercisable, Shares | shares	884,692
Options Exercisable, Weighted-Average Exercise Price	$ 10.87
Range Three [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Minimum	11.00
Range of Exercise Prices, Maximum	$ 16.53
Options Outstanding, Shares | shares	624,251
Options Outstanding, Weighted-Average Remaining Contractual Life (in years)	7 years 3 months 18 days
Options Outstanding, Weighted-Average Exercise Price	$ 16.19
Options Exercisable, Shares | shares	291,229
Options Exercisable, Weighted-Average Exercise Price	$ 16.34
Range Four [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Minimum	17.68
Range of Exercise Prices, Maximum	$ 18.70
Options Outstanding, Shares | shares	305,241
Options Outstanding, Weighted-Average Remaining Contractual Life (in years)	7 years 8 months 12 days
Options Outstanding, Weighted-Average Exercise Price	$ 18.67
Options Exercisable, Shares | shares	162,142
Options Exercisable, Weighted-Average Exercise Price	$ 18.68
Range Five [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Minimum	18.77
Range of Exercise Prices, Maximum	$ 22.67
Options Outstanding, Shares | shares	217,552
Options Outstanding, Weighted-Average Remaining Contractual Life (in years)	9 years
Options Outstanding, Weighted-Average Exercise Price	$ 19.92
Options Exercisable, Shares | shares	38,948
Options Exercisable, Weighted-Average Exercise Price	$ 20.14
Range Six [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Minimum	8.49
Range of Exercise Prices, Maximum	$ 22.67
Options Outstanding, Shares | shares	2,920,233
Options Outstanding, Weighted-Average Remaining Contractual Life (in years)	7 years 1 month 6 days
Options Outstanding, Weighted-Average Exercise Price	$ 13.48
Options Exercisable, Shares | shares	1,393,408
Options Exercisable, Weighted-Average Exercise Price	$ 13.15

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Income Taxes - Additional Information (Detail) $ in Millions	9 Months Ended
	Sep. 30, 2018 USD ($)
Income Tax Disclosure [Line Items]
Deferred tax assets, valuation allowance	$ 10.9
Ownership Change [Member]
Income Tax Disclosure [Line Items]
Description of Ownership Change	An ownership change under Sections 382 and 383 of the Internal Revenue Code was deemed to occur in June 2018. In general, a Section 382 and 383 ownership change occurs if there is a cumulative change in our ownership by “5% shareholders” (as defined in the Internal Revenue Code of 1986, as amended) that exceeds 50 percentage points over a rolling three-year period.

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Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Millions	1 Months Ended
	Jun. 30, 2018	Apr. 30, 2016
Pending Litigation [Member] | OSHA [Member]
Commitments and Contingencies [Line Items]
Compensation and fees demanded by plaintiff	$ 0.2
SVP–Asia [Member] | Transition Agreement [Member]
Commitments and Contingencies [Line Items]
Compensation and fees demanded by plaintiff		$ 2.6
Termination of options to purchase common stock		164,880
Termination of options to purchase restricted stock		77,760
Compensation and fees damages awarded to plaintiff	$ 1.2

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Concentration of Customers - Additional Information (Detail) - Customer Concentration Risk [Member]	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Sales Revenues [Member]
Concentration Risk [Line Items]
Customer risk percentage	100.00%	100.00%	100.00%	100.00%
Sales Revenues [Member] | Minimum [Member]
Concentration Risk [Line Items]
Customer risk percentage	10.00%	10.00%	10.00%	10.00%
Accounts Receivable [Member] | Minimum [Member]
Concentration Risk [Line Items]
Customer risk percentage			10.00%		10.00%

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Concentration of Customers - Schedule of Revenues from Customers (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Concentration Risk [Line Items]
Revenues	$ 254,976	$ 253,498	$ 739,567	$ 701,695
Sales Revenues [Member] | Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Revenues	$ 254,976	$ 253,498	$ 739,567	$ 701,695
Percentage of Total	100.00%	100.00%	100.00%	100.00%
Sales Revenues [Member] | GE [Member] | Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Revenues	$ 81,699	$ 98,962	$ 244,534	$ 297,550
Percentage of Total	32.00%	39.00%	33.10%	42.40%
Sales Revenues [Member] | Vestas [Member] | Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Revenues	$ 73,584	$ 72,366	$ 226,153	$ 181,215
Percentage of Total	28.90%	28.60%	30.60%	25.80%
Sales Revenues [Member] | Nordex Acciona [Member] | Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Revenues	$ 46,103	$ 43,052	$ 141,663	$ 126,214
Percentage of Total	18.10%	17.00%	19.10%	18.00%
Sales Revenues [Member] | Siemens Gamesa [Member] | Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Revenues	$ 33,964	$ 34,999	$ 84,782	$ 86,675
Percentage of Total	13.30%	13.80%	11.50%	12.40%
Sales Revenues [Member] | Other [Member] | Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Revenues	$ 19,626	$ 4,119	$ 42,435	$ 10,041
Percentage of Total	7.70%	1.60%	5.70%	1.40%

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Concentration of Customers - Schedule of Trade Accounts Receivable from Certain Customers (Detail) - Accounts Receivable [Member] - Customer Concentration Risk [Member]	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
GE [Member]
Concentration Risk [Line Items]
Percentage of Total	9.50%	18.90%
Vestas [Member]
Concentration Risk [Line Items]
Percentage of Total	41.10%	52.40%
Nordex Acciona [Member]
Concentration Risk [Line Items]
Percentage of Total	34.60%	19.50%

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Segment Reporting - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2018 Segment
Segment Reporting [Abstract]
Number of reportable segments	4

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Segment Reporting - Schedule of Segment Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Segment Reporting Information [Line Items]
Total revenues	$ 254,976	$ 253,498	$ 739,567	$ 701,695
Total income from operations	7,211	20,991	28,368	51,776
Total property, plant and equipment, net	150,931		150,931		$ 123,480
U.S. Segment [Member]
Segment Reporting Information [Line Items]
Total revenues	36,689	47,725	127,508	143,307
Total income from operations	(18,687)	(7,474)	(41,030)	(21,148)
Total property, plant and equipment, net	34,865		34,865		24,575
Asia Segment [Member]
Segment Reporting Information [Line Items]
Total revenues	70,227	102,953	225,828	261,733
Total income from operations	7,401	22,104	23,204	55,452
Total property, plant and equipment, net	30,345		30,345		28,887
Mexico Segment [Member]
Segment Reporting Information [Line Items]
Total revenues	79,565	60,694	193,882	158,110
Total income from operations	5,447	4,883	9,932	8,917
Total property, plant and equipment, net	63,269		63,269		39,756
EMEA Segment [Member]
Segment Reporting Information [Line Items]
Total revenues	68,495	42,126	192,349	138,545
Total income from operations	13,050	1,478	36,262	8,555
Total property, plant and equipment, net	22,452		22,452		$ 30,262
U.S. [Member]
Segment Reporting Information [Line Items]
Total revenues	36,689	47,725	127,508	143,307
China [Member]
Segment Reporting Information [Line Items]
Total revenues	70,227	102,953	225,828	261,733
Mexico [Member]
Segment Reporting Information [Line Items]
Total revenues	79,565	60,694	193,882	158,110
Turkey [Member]
Segment Reporting Information [Line Items]
Total revenues	$ 68,495	$ 42,126	$ 192,349	$ 138,545

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Segment Reporting - Schedule of Segment Information (Parenthetical) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Segment Reporting Information [Line Items]
General and administrative costs	$ 9,756	$ 9,315	$ 31,908	$ 28,373
U.S. Segment [Member]
Segment Reporting Information [Line Items]
General and administrative costs	$ 9,800	$ 9,300	$ 31,900	$ 28,400

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Adjustments to Previously Reported Financial Statements from the Adoption of an Accounting Pronouncement - Condensed Consolidated Balance Sheet (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 110,838	$ 148,113
Restricted cash	2,845	3,849
Accounts receivable	117,066	121,576
Contract assets	122,265	105,619
Inventories	7,445	4,112
Prepaid expenses and other current assets	25,036	27,507
Total current assets	385,495	410,776
Property, plant, and equipment, net	150,931	123,480
Goodwill		2,807
Intangible assets, net		1,108
Other noncurrent assets		18,391
Total assets	574,696	556,562
Current liabilities:
Accounts payable and accrued expenses		166,743
Accrued warranty	32,704	30,419
Customer deposits		432
Current maturities of long-term debt	39,201	35,506
Contract liabilities	8,335	2,763
Total current liabilities	248,279	235,863
Long-term debt, net of debt issuance costs and current maturities	93,583	85,879
Other noncurrent liabilities	4,284	4,938
Total liabilities	346,146	326,680
Commitments and contingencies
Stockholders’ equity:
Common shares, $0.01 par value, 100,000 shares authorized and 34,049 shares issued and 34,021 shares outstanding at December 31, 2017	346	340
Paid-in capital	310,166	301,543
Accumulated other comprehensive loss	(21,977)	(558)
Accumulated deficit	(56,805)	(70,932)
Treasury stock, at cost, 28 shares at December 31, 2017	(3,180)	(511)
Total stockholders’ equity	228,550	229,882
Total liabilities and stockholders’ equity	$ 574,696	556,562
As Reported [Member] | ASU 2014-09 [Member]
Current assets:
Cash and cash equivalents		148,113
Restricted cash		3,849
Accounts receivable		121,576
Inventories		67,064
Inventories held for customer orders		64,858
Prepaid expenses and other current assets		27,507
Total current assets		432,967
Property, plant, and equipment, net		123,480
Goodwill		2,807
Intangible assets, net		150
Other noncurrent assets		14,130
Total assets		573,534
Current liabilities:
Accounts payable and accrued expenses		166,743
Accrued warranty		29,163
Deferred revenue		81,048
Customer deposits		10,134
Current maturities of long-term debt		35,506
Total current liabilities		322,594
Long-term debt, net of debt issuance costs and current maturities		85,879
Other noncurrent liabilities		4,444
Total liabilities		412,917
Commitments and contingencies
Stockholders’ equity:
Common shares, $0.01 par value, 100,000 shares authorized and 34,049 shares issued and 34,021 shares outstanding at December 31, 2017		340
Paid-in capital		301,543
Accumulated other comprehensive loss		(558)
Accumulated deficit		(140,197)
Treasury stock, at cost, 28 shares at December 31, 2017		(511)
Total stockholders’ equity		160,617
Total liabilities and stockholders’ equity		573,534
Adoption of Topic 606 [Member] | ASU 2014-09 [Member]
Current assets:
Contract assets		105,619
Inventories		(62,952)
Inventories held for customer orders		(64,858)
Total current assets		(22,191)
Intangible assets, net		958
Other noncurrent assets		4,261
Total assets		(16,972)
Current liabilities:
Accrued warranty		1,256
Deferred revenue		(81,048)
Customer deposits		(9,702)
Contract liabilities		2,763
Total current liabilities		(86,731)
Other noncurrent liabilities		494
Total liabilities		(86,237)
Commitments and contingencies
Stockholders’ equity:
Accumulated deficit		69,265
Total stockholders’ equity		69,265
Total liabilities and stockholders’ equity		$ (16,972)

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Adjustments to Previously Reported Financial Statements from the Adoption of an Accounting Pronouncement - Condensed Consolidated Balance Sheet (Parenthetical) (Detail) - $ / shares	Sep. 30, 2018	Dec. 31, 2017
Revenue Initial Application Period Cumulative Effect Transition [Abstract]
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	34,629,000	34,049,000
Common stock, shares outstanding	34,511,000	34,021,000
Treasury stock, shares	118,000	28,000

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Adjustments to Previously Reported Financial Statements from the Adoption of an Accounting Pronouncement - Condensed Consolidated Income Statement (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Net sales	$ 254,976	$ 253,498	$ 739,567	$ 701,695
Cost of sales	216,594	210,840	625,817	592,495
Startup and transition costs	21,415	12,352	53,474	29,051
Total cost of goods sold	238,009	223,192	679,291	621,546
Gross profit	16,967	30,306	60,276	80,149
General and administrative expenses	9,756	9,315	31,908	28,373
Income from operations	7,211	20,991	28,368	51,776
Other income (expense):
Interest income	45	48	129	78
Interest expense	(2,323)	(3,254)	(8,376)	(9,215)
Realized gain (loss) on foreign currency remeasurement	(8,181)	39	(12,957)	(2,575)
Miscellaneous income	2,511	390	4,003	968
Total other expense	(7,948)	(2,777)	(20,598)	(10,744)
Income (loss) before income taxes	(737)	18,214	7,770	41,032
Income tax benefit (provision)	10,269	3,523	6,357	(4,505)
Net income	$ 9,532	$ 21,737	$ 14,127	$ 36,527
Weighted-average common shares outstanding:
Basic	34,419	33,891	34,212	33,789
Diluted	36,282	35,015	35,946	34,748
Net income per common share:
Basic	$ 0.28	$ 0.64	$ 0.41	$ 1.08
Diluted	$ 0.26	$ 0.62	$ 0.39	$ 1.05
As Reported [Member] | ASU 2014-09 [Member]
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Net sales		$ 243,354		$ 683,142
Cost of sales		198,141		568,659
Startup and transition costs		12,352		29,051
Total cost of goods sold		210,493		597,710
Gross profit		32,861		85,432
General and administrative expenses		9,315		28,373
Income from operations		23,546		57,059
Other income (expense):
Interest income		48		78
Interest expense		(3,254)		(9,215)
Realized gain (loss) on foreign currency remeasurement		39		(2,575)
Miscellaneous income		390		968
Total other expense		(2,777)		(10,744)
Income (loss) before income taxes		20,769		46,315
Income tax benefit (provision)		(371)		(8,514)
Net income		$ 20,398		$ 37,801
Weighted-average common shares outstanding:
Basic		33,891		33,789
Diluted		35,015		34,748
Net income per common share:
Basic		$ 0.60		$ 1.12
Diluted		$ 0.58		$ 1.09
Adoption of Topic 606 [Member] | ASU 2014-09 [Member]
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Net sales		$ 10,144		$ 18,553
Cost of sales		12,699		23,836
Total cost of goods sold		12,699		23,836
Gross profit		(2,555)		(5,283)
Income from operations		(2,555)		(5,283)
Other income (expense):
Income (loss) before income taxes		(2,555)		(5,283)
Income tax benefit (provision)		3,894		4,009
Net income		$ 1,339		$ (1,274)
Weighted-average common shares outstanding:
Basic		33,891		33,789
Diluted		35,015		34,748
Net income per common share:
Basic		$ 0.04		$ (0.04)
Diluted		$ 0.04		$ (0.04)

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Adjustments to Previously Reported Financial Statements from the Adoption of an Accounting Pronouncement - Condensed Consolidated Statement of Comprehensive Income (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Net income	$ 9,532	$ 21,737	$ 14,127	$ 36,527
Foreign currency translation adjustments	(15,621)	1,231	(21,908)	2,808
Comprehensive income (loss)	$ (5,792)	22,968	$ (7,292)	39,335
As Reported [Member] | ASU 2014-09 [Member]
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Net income		20,398		37,801
Foreign currency translation adjustments		1,231		2,808
Comprehensive income (loss)		21,629		40,609
Adoption of Topic 606 [Member] | ASU 2014-09 [Member]
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Net income		1,339		(1,274)
Comprehensive income (loss)		$ 1,339		$ (1,274)

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Adjustments to Previously Reported Financial Statements from the Adoption of an Accounting Pronouncement - Condensed Consolidated Statements of Changes in Stockholders' Equity (Detail) - USD ($) shares in Thousands, $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Balance at December 31, 2017	$ 228,550	$ 229,882
As Reported [Member] | ASU 2014-09 [Member]
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Balance at December 31, 2017		160,617
Adoption of Topic 606 [Member] | ASU 2014-09 [Member]
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Balance at December 31, 2017		69,265
Cumulative effect of the adoption of Topic 606		69,265
Common Stock [Member]
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Balance at December 31, 2017		$ 340
Beginning balance, shares		34,049
Common Stock [Member] | As Reported [Member] | ASU 2014-09 [Member]
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Balance at December 31, 2017		$ 340
Beginning balance, shares		34,049
Paid-in Capital [Member]
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Balance at December 31, 2017		$ 301,543
Paid-in Capital [Member] | As Reported [Member] | ASU 2014-09 [Member]
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Balance at December 31, 2017		301,543
Accumulated Other Comprehensive Loss [Member]
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Balance at December 31, 2017		(558)
Accumulated Other Comprehensive Loss [Member] | As Reported [Member] | ASU 2014-09 [Member]
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Balance at December 31, 2017		(558)
Accumulated Deficit [Member]
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Balance at December 31, 2017		(70,932)
Accumulated Deficit [Member] | As Reported [Member] | ASU 2014-09 [Member]
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Balance at December 31, 2017		(140,197)
Accumulated Deficit [Member] | Adoption of Topic 606 [Member] | ASU 2014-09 [Member]
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Cumulative effect of the adoption of Topic 606		69,265
Treasury Stock, at Cost [Member]
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Balance at December 31, 2017		(511)
Treasury Stock, at Cost [Member] | As Reported [Member] | ASU 2014-09 [Member]
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Balance at December 31, 2017		$ (511)

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Adjustments to Previously Reported Financial Statements from the Adoption of an Accounting Pronouncement - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Adoption of Topic 606 [Member] | ASU 2014-09 [Member]
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Increase (decrease) in stockholder's equity	$ (4.2)	$ 12.3	$ 61.2

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Adjustments to Previously Reported Financial Statements from the Adoption of an Accounting Pronouncement - Condensed Consolidated Statements of Cash Flows (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash flows from operating activities:
Net income	$ 14,127	$ 36,527
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	19,080	14,143
Share-based compensation expense	6,971	4,794
Amortization of debt issuance costs	284	430
Deferred income taxes	(10,898)	(2,613)
Changes in assets and liabilities:
Accounts receivable	2,052	(66,438)
Contract assets and liabilities	(13,466)	7,604
Inventories	(3,489)	(335)
Prepaid expenses and other current assets	1,941	881
Other noncurrent assets	(4,503)	(7,615)
Accounts payable and accrued expenses		48,083
Accrued warranty	2,285	8,135
Other noncurrent liabilities	(2,544)	(136)
Net cash provided by operating activities	17,195	43,460
Cash flows from investing activities:
Purchase of property and equipment	(50,636)	(35,312)
Net cash used in investing activities	(50,636)	(35,312)
Cash flows from financing activities:
Repayments of term loan	(74,972)	(2,812)
Net proceeds from accounts receivable financing	(3,915)	8,196
Proceeds from working capital loans		6,620
Repayments of working capital loans		(11,258)
Net proceeds from other debt	(14,174)	4,556
Proceeds from exercise of stock options	2,211	988
Repurchase of common stock including shares withheld in lieu of income taxes	(2,859)	(1,264)
Net cash provided by (used in) financing activities	(4,555)	5,026
Impact of foreign exchange rates on cash, cash equivalents and restricted cash	(283)	305
Net change in cash, cash equivalents and restricted cash	(38,279)	13,479
Cash, cash equivalents and restricted cash, beginning of year	152,437	129,863
Cash, cash equivalents and restricted cash, end of period	$ 114,158	143,342
As Reported [Member]
Cash flows from operating activities:
Net income		37,801
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization		13,622
Share-based compensation expense		4,794
Amortization of debt issuance costs		430
Changes in assets and liabilities:
Accounts receivable		(66,438)
Inventories		(24,979)
Prepaid expenses and other current assets		881
Other noncurrent assets		3,067
Accounts payable and accrued expenses		47,498
Accrued warranty		8,238
Customer deposits		9,019
Deferred revenue		17,726
Other noncurrent liabilities		(136)
Net cash provided by operating activities		51,523
Cash flows from investing activities:
Purchase of property and equipment		(35,312)
Net cash used in investing activities		(35,312)
Cash flows from financing activities:
Repayments of term loan		(2,812)
Net proceeds from accounts receivable financing		8,196
Proceeds from working capital loans		6,620
Repayments of working capital loans		(11,258)
Net proceeds from other debt		4,556
Proceeds from exercise of stock options		988
Repurchase of common stock including shares withheld in lieu of income taxes		(1,264)
Restricted cash		(1,543)
Net cash provided by (used in) financing activities		3,483
Impact of foreign exchange rates on cash, cash equivalents and restricted cash		305
Net change in cash, cash equivalents and restricted cash		19,999
Cash, cash equivalents and restricted cash, beginning of year		119,066
Cash, cash equivalents and restricted cash, end of period		139,065
Adoption of ASU 2016-18 [Member]
Changes in assets and liabilities:
Other noncurrent assets		(8,063)
Net cash provided by operating activities		(8,063)
Cash flows from financing activities:
Restricted cash		1,543
Net cash provided by (used in) financing activities		1,543
Net change in cash, cash equivalents and restricted cash		(6,520)
Cash, cash equivalents and restricted cash, beginning of year		10,797
Cash, cash equivalents and restricted cash, end of period		4,277
Adoption of Topic 606 [Member] | ASU 2014-09 [Member]
Cash flows from operating activities:
Net income		(1,274)
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization		521
Deferred income taxes		(2,613)
Changes in assets and liabilities:
Contract assets and liabilities		7,604
Inventories		24,644
Other noncurrent assets		(2,619)
Accounts payable and accrued expenses		585
Accrued warranty		(103)
Customer deposits		(9,019)
Deferred revenue		$ (17,726)