10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

________________________________

FORM 10-Q

________________________________

x Quarterly Report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

For the quarterly period ended: June 30, 2018

¨ Transition Report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

For the transition period from _____ to _____.

Commission File Number: 0-19672

________________________________

American Superconductor Corporation

(Exact name of registrant as specified in its charter)

________________________________

Delaware	04-2959321
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)
114 East Main St. Ayer, Massachusetts	01432
(Address of principal executive offices)	(Zip Code)

(978) 842-3000

(Registrant’s telephone number, including area code)

N/A

(Former name, former address and former fiscal year, if changed since last report)

________________________________

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  x    No  ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).     Yes  x    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 x
Non-accelerated filer ¨	(Do not check if a smaller reporting company)	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   x

Shares outstanding of the Registrant’s common stock:

Common Stock, par value $0.01 per share	21,228,071
Class	Outstanding as of July 27, 2018

AMERICAN SUPERCONDUCTOR CORPORATION

INDEX

		Page No.
PART I—FINANCIAL INFORMATION
Item 1.	Financial Statements	3
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	24
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	34
Item 4.	Controls and Procedures	34
PART II—OTHER INFORMATION
Item 1.	Legal Proceedings	34
Item 1A.	Risk Factors	35
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	35
Item 3.	Defaults Upon Senior Securities	35
Item 4.	Mine Safety Disclosure	35
Item 5.	Other Information	35
Item 6.	Exhibits	35
Signature		37

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AMERICAN SUPERCONDUCTOR CORPORATION

PART I — FINANCIAL INFORMATION

ITEM 1. FINANCIAL STATEMENTS

UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS

(In thousands)

	June 30, 2018			March 31, 2018
ASSETS
Current assets:
Cash and cash equivalents	$	26,750		$	34,084
Accounts receivable, net	11,532			7,365
Inventory	18,353			19,780
Note receivable, current portion	3,000			3,000
Prepaid expenses and other current assets	4,709			2,947
Total current assets	64,344			67,176
Property, plant and equipment, net	11,554			12,513
Intangibles, net	3,145			3,230
Note receivable, long term portion, net of discount of $280 as of June 30, 2018 and net of discount of $336 and deferred gain of $105 as of March 31, 2018	2,720			2,559
Goodwill	1,719			1,719
Restricted cash	165			165
Deferred tax assets	516			542
Other assets	283			271
Total assets	$	84,446		$	88,175
LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities:
Accounts payable and accrued expenses	$	15,144		$	12,625
Derivative liabilities	1,681			1,217
Deferred revenue, current portion	11,433			13,483
Total current liabilities	28,258			27,325
Deferred revenue, long term portion	8,040			8,454
Deferred tax liabilities	110			110
Other liabilities	98			57
Total liabilities	36,506			35,946
Commitments and contingencies (Note 15)
Stockholders' equity:
Common stock	214			211
Additional paid-in capital	1,041,980			1,041,113
Treasury stock	(1,884		)	(1,645		)
Accumulated other comprehensive income	667			883
Accumulated deficit	(993,037		)	(988,333		)
Total stockholders' equity	47,940			52,229
Total liabilities and stockholders' equity	$	84,446		$	88,175

The accompanying notes are an integral part of the unaudited condensed consolidated financial statements.

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AMERICAN SUPERCONDUCTOR CORPORATION

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(In thousands, except per share data)

	Three months ended June 30,
	2018			2017
Revenues	$	12,607		$	8,923
Cost of revenues	8,714			13,409
Gross margin	3,893			(4,486		)
Operating expenses:
Research and development	2,840			2,717
Selling, general and administrative	5,786			6,138
Amortization of acquisition-related intangibles	85			13
Restructuring	310			1,339
Total operating expenses	9,021			10,207
Operating loss	(5,128		)	(14,693		)
Change in fair value of warrants	(464		)	925
Interest income (expense), net	201			(10		)
Other income (expense), net	609			(1,374		)
Loss before income tax (benefit) expense	(4,782		)	(15,152		)
Income tax (benefit) expense	(45		)	100
Net loss	$	(4,737	)	$	(15,252	)
Net loss per common share
Basic	$	(0.23	)	$	(0.91	)
Diluted	$	(0.23	)	$	(0.91	)
Weighted average number of common shares outstanding
Basic	20,167			16,778
Diluted	20,167			16,778

The accompanying notes are an integral part of the unaudited condensed consolidated financial statements.

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AMERICAN SUPERCONDUCTOR CORPORATION

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS

(In thousands)

	Three months ended June 30,
	2018			2017
Net loss	$	(4,737	)	$	(15,252	)
Other comprehensive gain (loss), net of tax:
Foreign currency translation gain (loss)	(216		)	820
Total other comprehensive gain (loss), net of tax	(216		)	820
Comprehensive loss	$	(4,953	)	$	(14,432	)

The accompanying notes are an integral part of the unaudited condensed consolidated financial statements.

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AMERICAN SUPERCONDUCTOR CORPORATION

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(In thousands)

	Three months ended June 30,
	2018			2017
Cash flows from operating activities:
Net loss	$	(4,737	)	$	(15,252	)
Adjustments to reconcile net loss to net cash used in operations:
Depreciation and amortization	1,150			4,345
Stock-based compensation expense	785			754
Provision for excess and obsolete inventory	144			250
Change in fair value of warrants	464			(925		)
Non-cash interest expense	(56		)	19
Other non-cash items	(394		)	718
Changes in operating asset and liability accounts:
Accounts receivable	(4,192		)	319
Inventory	(459		)	1,719
Prepaid expenses and other current assets	(332		)	(273		)
Accounts payable and accrued expenses	75			(404		)
Deferred revenue	666			3,300
Net cash used in operating activities	(6,886		)	(5,430		)
Cash flows from investing activities:
Purchase of property, plant and equipment	(115		)	(76		)
Proceeds from the sale of property, plant and equipment	—			10
Change in other assets	(51		)	(23		)
Net cash used in investing activities	(166		)	(89		)
Cash flows from financing activities:
Employee taxes paid related to net settlement of equity awards	(238		)	(274		)
Repayment of debt	—			(1,575		)
Proceeds from public equity offering, net	—			16,954
Net cash provided by/(used in) financing activities	(238		)	15,105
Effect of exchange rate changes on cash	(44		)	412
Net increase/(decrease) in cash, cash equivalents and restricted cash	(7,334		)	9,998
Cash, cash equivalents and restricted cash at beginning of period	34,249			27,744
Cash, cash equivalents and restricted cash at end of period	$	26,915		$	37,742
Supplemental schedule of cash flow information:
Cash paid for income taxes, net of refunds	176			96
Issuance of common stock to settle liabilities	85			90
Cash paid for interest	—			42

The accompanying notes are an integral part of the unaudited condensed consolidated financial statements.

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AMERICAN SUPERCONDUCTOR CORPORATION

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

1. Nature of the Business and Operations and Liquidity

Nature of the Business and Operations

American Superconductor Corporation (“AMSC” or the “Company”) was founded on April 9, 1987. The Company is a leading provider of megawatt-scale solutions that lower the cost of wind power and enhance the performance of the power grid. In the wind power market, the Company enables manufacturers to field wind turbines through its advanced engineering, support services and power electronics products. In the power grid market, the Company enables electric utilities and renewable energy project developers to connect, transmit and distribute power through its transmission planning services and power electronics and superconductor-based products. The Company’s wind and power grid products and services provide exceptional reliability, security, efficiency and affordability to its customers.

These unaudited condensed consolidated financial statements of the Company have been prepared on a going concern basis in accordance with United States generally accepted accounting principles (“GAAP”) and the Securities and Exchange Commission’s (“SEC”) instructions to Form 10-Q. The going concern basis of presentation assumes that the Company will continue operations and will be able to realize its assets and discharge its liabilities and commitments in the normal course of business. Certain information and footnote disclosures normally included in the financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to those instructions. The year-end condensed balance sheet data was derived from audited financial statements but does not include all disclosures required by GAAP. The unaudited condensed consolidated financial statements, in the opinion of management, reflect all adjustments (consisting of normal recurring adjustments) necessary for a fair statement of the results for the interim periods ended June 30, 2018 and 2017 and the financial position at June 30, 2018; however, these results are not necessarily indicative of results which may be expected for the full year. The interim condensed consolidated financial statements, and notes thereto, should be read in conjunction with the audited consolidated financial statements for the year ended March 31, 2018, and notes thereto, included in the Company’s annual report on Form 10-K for the year ended March 31, 2018 filed with the Securities and Exchange Commission on June 6, 2018.

Liquidity

The Company has experienced recurring operating losses and as of June 30, 2018, the Company had an accumulated deficit of $993.0 million. In addition, the Company has experienced recurring negative operating cash flows.  At June 30, 2018, the Company had cash and cash equivalents of $26.8 million, with no outstanding debt other than ordinary trade payables. Cash used in operations for the three months ended June 30, 2018 was $6.9 million.

From April 1, 2011 through the date of this filing, the Company has reduced its global workforce substantially. As of June 30, 2018, the Company had a global workforce of 231 persons.  The Company plans to closely monitor its expenses and, if required, expects to further reduce operating costs and capital spending to enhance liquidity.

Over the last several years, the Company has entered into several debt and equity financing arrangements in order to raise capital.  Since April 1, 2012, the Company has generated aggregate cash flows from financing activities of $85.0 million.  Included in this amount are proceeds of approximately $17.0 million after deducting underwriting discounts and commissions and offering expenses payable by the Company, from the Company's equity offering completed on May 10, 2017, which includes the subsequent exercise by the underwriters of their option in full to purchase additional shares. The Company terminated its At Market Issuance Sales Agreement ("ATM") with FBR Capital Markets & Co. in conjunction with this equity offering. See Note 14 “Stockholders' Equity” for further discussion of these financing arrangements.

On July 3, 2018, the Company and its wholly-owned subsidiaries Suzhou AMSC Superconductor Co. Ltd. (“AMSC China”) and AMSC Austria GMBH (“AMSC Austria”) entered into a settlement agreement (the “Settlement Agreement”) with Sinovel Wind Group Co., Ltd. (“Sinovel”). The Settlement Agreement settles the litigation and arbitration proceedings between the Company and Sinovel, as further described in Note 15 “Commitments and Contingencies". Under the terms of the Settlement Agreement, Sinovel has agreed to pay AMSC China an aggregate cash amount in Renminbi (RMB) equivalent to $57.5 million, consisting of two installments. Sinovel paid the first installment of $32.5 million on July 4, 2018, and has agreed to pay the second installment of $25.0 million (the “Second Payment”) within ten (10) months after the U.S. District Court for the Western District of Wisconsin (the “District Court”) delivers the first sentence against Sinovel in the criminal case entitled United States v. Sinovel Wind Co., Ltd., Case Number 3:13-cr-00084-jdp. On July 6, 2018, the District Court delivered such sentence, and therefore the Second Payment is due by May 6, 2019 (the “Second Payment Due Date”). On July 24, 2018, AMSC China paid $30.7 million to AMSC Austria to settle outstanding inter-company balances.

7

On February 5, 2018, the Company entered into a Purchase and Sale Agreement (the “PSA”) with 64 Jackson, LLC (the “Purchaser”) and Stewart Title Guaranty Company (“Escrow Agent”), to effectuate the sale of certain real property located at 64 Jackson Road, Devens, Massachusetts, including the building that had served as the Company’s headquarters (collectively, the “Property”), in exchange for total consideration of $23.0 million, composed of (i) cash consideration of $17.0 million, and (ii) a $6.0 million subordinated secured commercial promissory note payable to the Company (the "Seller Note"). Subsequently, the Seller, the Purchaser and Jackson 64 MGI, LLC (“Assignee”) entered into an Assignment of Purchase and Sale Agreement (the “Assignment Agreement”), pursuant to which the Purchaser assigned all of its rights and interests in the PSA to the Assignee and the Assignee agreed to assume all of the Purchaser’s obligations and liabilities under the PSA. The transaction closed on March 28, 2018, at which time the Company received, from the Assignee, cash consideration, net of certain agreed upon closing costs, of $16.9 million, and the Seller Note at an interest rate of 1.96%. The Seller Note is secured by a subordinated second mortgage on the Property and a subordinated second assignment of leases and rents.

In December 2015, the Company entered into a set of strategic agreements valued at approximately $210.0 million with Inox Wind Ltd. (“Inox” or "Inox Wind"), which includes a multi-year supply contract pursuant to which the Company will supply electric control systems to Inox and a license agreement allowing Inox to manufacture a limited number of electrical control systems. After Inox purchases the specified number of electrical control systems required under the terms of the supply contract, Inox agreed that the Company will continue as Inox’s preferred supplier and Inox will be required to purchase from the Company a majority of its electric control systems requirements for an additional three-year period.

The Company believes that based on the information presented above and its quarterly management assessment, it has sufficient liquidity to fund its operations and capital expenditures for the next twelve months following the issuance of the financial statements for the three months ended June 30, 2018. The Company’s liquidity is highly dependent on its ability to increase revenues, including its ability to collect revenues under our agreements with Inox, its ability to control its operating costs, and its ability to raise additional capital, if necessary. There can be no assurance that the Company will be able to continue to raise additional capital, on favorable terms or at all, from other sources or execute on any other means of improving liquidity described above.

2. Revenue Recognition

On April 1, 2018, the Company adopted ASC 606, Revenue from Contracts with Customers, and all the related amendments and applied it to all contracts that were not completed as of April 1, 2018 using the modified retrospective method. The Company recognized the cumulative effect of initially applying the new revenue standard as an adjustment of less than $0.1 million to the opening balance of accumulated deficit. Prior period amounts have not been restated and continue to be reported under the accounting standards in effect for those periods.

The adoption of this guidance will lead to recognizing certain revenue transactions sooner than in the past on certain contracts, as the Company will need to estimate the revenue it will be entitled to upon contract completion, and later on other contracts, such as Consulting and Statement of Work transactions, due to the lack of an enforceable right to payment for performance obligations satisfied over time, specifically in the technology product line. The Company does not expect a material impact to its consolidated statements of operations on an ongoing basis from the adoption of the new standard.

In addition, the FASB issued ASU 2017-05, Other Income - Gains and Losses from the Derecognition of Non-financial Assets (Subtopic 610-20), in February 2017, to amend ASC 610-20, Other Income - Gains and Losses from the Derecognition of Non-financial Assets, (issued at the same time as ASC 606), which provides a model for the measurement and recognition of gains and losses on the sale of nonfinancial assets, such as property and equipment, including real estate. As a result of adopting ASU 2017-05 on April 1, 2018, the Company recognized an adjustment to the opening balance of accumulated deficit for the deferred gain from the March 28, 2018, sale of the Company's former headquarters in Devens, Massachusetts in the amount of $0.1 million.

The cumulative effect to the Company’s consolidated April 1, 2018 balance sheet from the adoption of the new revenue standard and the sale of nonfinancial assets was as follows (in thousands):

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	March 31, 2018			Opening Adjustment			April 1, 2018
Assets:
Inventory	$	19,780		$	(1,599	)	$	18,181
Prepaid expenses and other current assets	2,947			1,599			4,546
Notes receivable, long term portion	2,559			105			2,664
Liabilities and Stockholders' Equity:
Accounts payable and accrued expenses	$	(12,625	)	$	(2,729	)	$	(15,354	)
Deferred revenue	(13,483		)	2,657			(10,826		)
Accumulated deficit	$	(988,333	)	$	(33	)	$	(988,366	)

Included in the opening adjustment are reclassifications for deferred program costs and deferred revenue for previous balances related to agreements that no longer meet the definition of a customer contract under ASC 606. The impact of adoption on the Company’s opening balances and for the three months ended June 30, 2018, in all financial statement line items impacted by ASC 606 was immaterial from the amount that would have been reported under the previous guidance.

The Company’s revenues in its Grid segment are derived primarily through transmitting and distributing power, providing planning services that allow it to identify power grid needs and risks, and developing ship protection systems for the US Navy. The Company’s revenues in its Wind segment are derived primarily through supplying advanced power electronics and control systems, licensing our highly engineered wind turbine designs, and providing extensive customer support services to wind turbine manufacturers. The Company records revenue based on a five-step model in accordance with ASC 606. For its customer contracts, the Company identifies the performance obligations, determines the transaction price, allocates the contract transaction price to the performance obligations, and recognizes the revenue when (or as) control of goods or services is transferred to the customer. As of June 30, 2018, 82% of revenue was recognized at the point in time when control transferred to the customer, with the remainder being recognized over time.

In the Company's equipment and system product line each contract with a customer summarizes each product sold to a customer, which typically represent distinct performance obligations. A contracts' transaction price is allocated to each distinct performance obligation using the respective standalone selling price which is determined primarily using the cost plus expected margin approach and recognized as revenue when, or as, the performance obligation is satisfied. The majority of the Company’s product sales transfer control to the customer in line with the contracted delivery terms and revenue is recorded at the point in time when products are transferred to the freight forwarder, as the Company has determined that this is the point in time that control transfers to the customer.

In the Company's service and technology development product line, there are multiple different types of transactions but each of them begins with a contract with a customer that summarizes each product sold to a customer, which typically represents distinct performance obligations. The technology development transactions are primarily for activities that have no alternative use and for which a profit can be expected throughout the life of the contract. In these cases, the revenue is recognized over time, but in the instances where the profit cannot be assured throughout the entire contract then the revenue is recognized at a point in time. Each contract's transaction price is allocated to each distinct performance obligation using the respective standalone selling price which is determined primarily using the cost plus expected margin approach. The ongoing service transactions are for service contracts that provide benefit to the customer simultaneously as the Company performs its obligations, and therefore this revenue is recognized ratably over time throughout the effective period of these contracts. The transaction prices on these contracts are allocated based on an adjusted market approach which is re-assessed annually for reasonableness. The field service transactions include contracts for delivery of goods and completion of services made at the customer's requests, which are not deemed satisfied until the work has been completed and/or the requested goods have been delivered, so all of this revenue is recognized at the point in time when the control changes, and at allocated prices based on the adjusted market approach driven by standard price lists. The royalty transactions are related to certain contract terms on transactions in the Company's equipment and systems product line based on activity as specified in the contracts. The transaction prices of these agreements are calculated based on an adjusted market approach as specified in the contract. The Company reports royalty revenue for usage-based royalties when the sales have occurred. In circumstances when collectability is not assured and a contract does not exist under ASC 606, revenue is deferred until a non-refundable payment has been received for substantially all the amount that is due and there are no further remaining performance obligations.

9

The Company's service contracts can include a purchase order from a customer for specific goods in which each item is a distinct performance obligation satisfied at a point in time at which control of the goods is transferred to the customer which occurs based on the contracted delivery terms or when the requested service work has been completed. The transaction price for these goods is allocated based on the adjusted market approach considering similar transactions under similar circumstances. Service contracts are also derived from ongoing maintenance contracts and extended service-type warranty contracts. In these transactions, the Company is contracted to provide an ongoing service over a specified period of time. As the customer is consuming the benefits as the service is being provided the revenue is recognized over time ratably.

The Company’s policy is to not accept volume discounts, product returns, or rebates and allowances within its contracts. In the event a contract was approved with any of these terms, it would be evaluated for variable consideration, estimated and recorded as a reduction of revenue in the same period the related product revenue was recorded.

The Company provides assurance-type warranties on all product sales for a term of typically one to two years, and extended service-type warranties at the customers’ option for an additional term ranging up to four additional years. The Company accrues for the estimated warranty costs for assurance warranties at the time of sale based on historical warranty experience plus any known or expected changes in warranty exposure. For all extended service-type warranties, the Company recognizes the revenue ratably over time during the effective period of the services.

The Company records revenue net of sales tax, value added tax, excise tax and other taxes collected concurrent with revenue-producing activities. The Company has elected to recognize the cost for freight and shipping when control over the products sold passes to customers and revenue is recognized. The Company has elected to recognize incremental costs of obtaining a contract as expense when incurred except in contracts where the amortization period would exceed twelve months; in such cases the long term amount will be assessed for materiality. The Company has elected to not adjust the promised amount of consideration for the effects of a significant financing component if the period of financing is twelve months or less.

The Company’s contracts with customers do not typically include extended payment terms and may include milestone billing over the life of the contract. Payment terms vary by contract type and type of customer and generally range from 30 to 60 days from delivery.

The following tables disaggregate the Company’s revenue by product line and by shipment destination:

	Three months ended June 30, 2018
Product Line:	Grid		Wind
Equipment and systems	$	7,462	$	3,492
Services and technology development	1,467		186
Total	$	8,929	$	3,678
Region:
Americas	$	7,496	$	23
Asia Pacific	808		3,595
EMEA	625		60
Total	$	8,929	$	3,678

As of June 30, 2018 and March 31, 2018, the Company’s contract assets and liabilities primarily relate to the timing differences between cash received from a customer in connection with contractual rights to invoicing and the timing of revenue recognition following completion of performance obligations. The Company's accounts receivable balance is made up entirely of customer contract related balances. Changes in the Company’s contract assets, which are included in “Unbilled AR” and "Deferred program costs" (see Note 7, “Accounts Receivable” and Note 8, "Inventory" for a reconciliation to the condensed consolidated balance sheet) and contract liabilities, which are included in the current portion and long term portion of “deferred revenue” in the Company’s condensed consolidated balance sheets, are as follows:

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	Unbilled AR			Deferred Program Costs			Contract Liabilities
Beginning balance as of March 31, 2018	$	3,016		$	2,567		$	21,937
Impact of adoption of ASC 606	—			(1,599		)	(2,657		)
Increases for costs incurred to fulfill performance obligations	—			1,132			—
Increase (decrease) due to customer billings	(3,221		)	—			4,281
Decrease due to cost recognition on completed performance obligations	—			(48		)	—
Increase (decrease) due to recognition of revenue based on transfer of control of performance obligations	4,824			(9		)	(3,324		)
Other changes and FX impact	(16		)	34			(764		)
Ending balance as of June 30, 2018	$	4,603		$	2,077		$	19,473

The Company’s remaining performance obligations represent the unrecognized revenue value of the Company’s contractual commitments. The Company’s performance obligations may vary significantly each reporting period based on the timing of major new contractual commitments. As of June 30, 2018, the Company had outstanding performance obligations on existing contracts under ASC 606 to be recognized in the next twelve months of approximately $50.6 million. There is also approximately $8.1 million of outstanding performance obligations to be recognized over a period of thirteen to sixty months. The remaining performance obligations are subject to customer actions and therefore the timing of revenue recognition cannot be reasonably estimated. The twelve month performance obligations include anticipated shipments to Inox based on the twelve month rolling forecast provided by Inox on the multi-year supply contract. The quantities specified in any forecast provided by Inox related to the multi-year supply contract are firm and irrevocable for the first three months of a twelve month rolling forecast. The timing of the performance obligations beyond the Inox twelve month provided forecast are not determinable and therefore are not included in the total remaining performance obligations.

The following table sets forth customers who represented 10% or more of the Company’s total revenues for the three months ended June 30, 2018 and 2017:

	Reportable Segment	June 30, 2018		June 30, 2017
Inox Wind Limited	Wind	25	%	22	%
Vestas	Grid	36	%	—	%
U.S. Navy	Grid	<10%		35	%

3. Stock-Based Compensation

The Company accounts for its stock-based compensation at fair value. The following table summarizes stock-based compensation expense by financial statement line item for the three months ended June 30, 2018 and 2017 (in thousands):

	Three months ended June 30,
	2018		2017
Cost of revenues	$	40	$	36
Research and development	51		49
Selling, general and administrative	694		669
Total	$	785	$	754

The Company issued 34,480 shares of immediately vested common stock and 276,000 shares of restricted stock awards during the three months ended June 30, 2018, and issued 33,487 shares of immediately vested common stock during the three months ended June 30, 2017.  These restricted stock awards generally vest over 2-3 years.  Awards for restricted stock include both time-based and performance-based awards.  For options and awards that vest upon the passage of time, expense is being recorded over the vesting period.  Performance-based awards are expensed over the requisite service period based on probability of achievement. In addition, the Company issued 16,667 restricted stock units under the 2007 Stock Incentive Plan during the three months ended June 30, 2017, each of which represents the right to receive one share of common stock in connection with a

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severance agreement entered into with one of the Company's former executive officers. These restricted stock units vested and were settled in shares of common stock on the eighth day after receipt of an irrevocable release.

The estimated fair value of the Company’s stock-based awards, less expected annual forfeitures, is amortized over the awards’ service period. The total unrecognized compensation cost for unvested outstanding stock options was $0.2 million at June 30, 2018. This expense will be recognized over a weighted average expense period of approximately 0.7 years. The total unrecognized compensation cost for unvested outstanding restricted stock was $3.5 million at June 30, 2018. This expense will be recognized over a weighted-average expense period of approximately 2.1 years.

The Company did not grant any stock options during the three months ended June 30, 2018 or 2017.

4. Computation of Net Loss per Common Share

Basic net loss per share (“EPS”) is computed by dividing net loss by the weighted-average number of common shares outstanding for the period. Where applicable, diluted EPS is computed by dividing the net loss by the weighted-average number of common shares and dilutive common equivalent shares outstanding during the period, calculated using the treasury stock method. Common equivalent shares include the effect of restricted stock, exercise of stock options and warrants and contingently issuable shares. For the three months ended June 30, 2018, 1.1 million shares were not included in the calculation of diluted EPS as they were considered anti-dilutive, of which 0.2 million relate to outstanding stock options, and 0.9 million relate to outstanding warrants. For the three months ended June 30, 2017, 1.5 million shares were not included in the calculation of diluted EPS as they were considered anti-dilutive, of which 0.3 million relate to outstanding stock options, and 1.2 million relate to outstanding warrants.

The following table reconciles the numerators and denominators of the earnings per share calculation for the three months ended June 30, 2018 and 2017 (in thousands, except per share data):

	Three months ended June 30,
	2018			2017
Numerator:
Net loss	$	(4,737	)	$	(15,252	)
Denominator:
Weighted-average shares of common stock outstanding	20,999			17,089
Weighted-average shares subject to repurchase	(832		)	(311		)
Shares used in per-share calculation ― basic	20,167			16,778
Shares used in per-share calculation ― diluted	20,167			16,778
Net loss per share ― basic	$	(0.23	)	$	(0.91	)
Net loss per share ― diluted	$	(0.23	)	$	(0.91	)

5. Acquisition and Related Goodwill

Acquisition of Infinia Technology Corporation

On September 25, 2017, the Company acquired Infinia Technology Corporation ("ITC") for approximately $3.8 million (the "Acquisition"). Located in Richmond, Washington, ITC is a technology firm founded in 2009 specializing in the design, development and commercialization of cryo-coolers for a wide range of applications. This technology supports the Company's efforts with the U.S. Navy and Ship Protection Systems (“SPS”) products.

The results of ITC's operations, which were not significant from the date of acquisition until June 30, 2018, are included in the Company’s consolidated results from the date of Acquisition of September 25, 2017, through the three months ended June 30, 2018. Assuming the Acquisition had occurred on April 1, 2017 and 2016, the impact on the consolidated results of the Company would not have been significant.

Goodwill

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At the time of the Acquisition, the Company allocated the purchase price to the assets acquired and liabilities assumed at their estimated fair values as of the date of Acquisition. The excess of the purchase price paid by the Company over the estimated fair value of net assets acquired of $1.7 million has been recorded as goodwill in the Company's Grid segment. Goodwill represents the value associated with the acquired workforce and synergies related to the merger of the two companies.

The Company did not identify any triggering events in the three months ended June 30, 2018, that would require interim impairment testing of goodwill.

6. Fair Value Measurements

A valuation hierarchy for disclosure of the inputs to valuation used to measure fair value has been established. This hierarchy prioritizes the inputs into three broad levels as follows:

Level 1	-	Inputs are unadjusted quoted prices in active markets for identical assets or liabilities that the Company has the ability to access at the measurement date.
Level 2	-	Inputs include quoted prices for similar assets and liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability, and inputs that are derived principally from or corroborated by observable market data by correlation or other means (market corroborated inputs).
Level 3	-	Unobservable inputs that reflect the Company’s assumptions that market participants would use in pricing the asset or liability. The Company develops these inputs based on the best information available, including its own data.

The Company provides a gross presentation of activity within Level 3 measurement roll-forward and details of transfers in and out of Level 1 and 2 measurements.  A change in the hierarchy of an investment from its current level is reflected in the period during which the pricing methodology of such investment changes.  Disclosure of the transfer of securities from Level 1 to Level 2 or Level 3 is made in the event that the related security is significant to total cash and investments.  The Company did not have any transfers of assets and liabilities from Level 1, Level 2 or Level 3 of the fair value measurement hierarchy during the three months ended June 30, 2018.

A financial asset’s or liability’s classification within the hierarchy is determined based on the lowest level input that is significant to the fair value measurement.

The following table provides the assets and liabilities carried at fair value on a recurring basis, measured as of June 30, 2018 and March 31, 2018 (in thousands):

	Total Carrying Value		Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
June 30, 2018:
Assets:
Cash equivalents	$	24,704	$	24,704	$	—	$	—
Derivative liabilities:
Warrants	1,681		—		—		1,681

	Total Carrying Value		Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
March 31, 2018:
Assets:
Cash equivalents	$	32,589	$	32,589	$	—	$	—
Derivative liabilities:
Warrants	$	1,217	$	—	$	—	$	1,217

The table below reflects the activity for the Company’s major classes of liabilities measured at fair value on a recurring basis (in thousands):

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	Warrants
April 1, 2018	$	1,217
Mark to market adjustment	464
Balance at June 30, 2018	$	1,681

	Warrants
April 1, 2017	$	1,923
Mark to market adjustment	(925		)
Balance at June 30, 2017	$	998

Valuation Techniques

Cash Equivalents

Cash equivalents consist of highly liquid instruments with maturities of three months or less that are regarded as high quality, low risk investments and are measured using such inputs as quoted prices, and are classified within Level 1 of the valuation hierarchy. Cash equivalents consist principally of certificates of deposits and money market accounts.

Warrants

Warrants were issued in conjunction with a Securities Purchase Agreement (the “Purchase Agreement”) with Capital Ventures International (“CVI”), an equity offering to Hudson Bay Capital in November 2014, and a Loan and Security Agreement with Hercules Technology Growth Capital, Inc. (“Hercules”). These warrants issued to CVI expired on October 4, 2017. See Note 13 “Warrants and Derivative Liabilities,” for additional information. Outstanding warrants are subject to revaluation at each balance sheet date, and any change in fair value will be recorded as a change in fair value in derivatives and warrants until the earlier of their exercise or expiration.

The Company relies on various assumptions in a lattice model to determine the fair value of warrants. The Company has valued the warrants within Level 3 of the valuation hierarchy. See Note 13, “Warrants and Derivative Liabilities,” for a discussion of the warrants and the valuation assumptions used.

7. Accounts Receivable

Accounts receivable at June 30, 2018 and March 31, 2018 consisted of the following (in thousands):

	June 30, 2018			March 31, 2018
Accounts receivable (billed)	$	6,983		$	4,403
Accounts receivable (unbilled)	4,603			3,016
Less: Allowance for doubtful accounts	(54		)	(54		)
Accounts receivable, net	$	11,532		$	7,365

8. Inventory

Inventory, net of reserves, at June 30, 2018 and March 31, 2018 consisted of the following (in thousands):

	June 30, 2018		March 31, 2018
Raw materials	$	6,316	$	7,526
Work-in-process	1,327		920
Finished goods	8,633		8,767
Deferred program costs	2,077		2,567
Net inventory	$	18,353	$	19,780

The Company recorded inventory write-downs of $0.1 million and $0.3 million for the three months ended June 30, 2018 and 2017, respectively.  These write downs were based on evaluating its inventory on hand for excess quantities and obsolescence.

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Deferred program costs as of June 30, 2018 and March 31, 2018 primarily represent costs incurred on programs where the Company needs to complete performance obligations before the related revenue and costs will be recognized.

9. Note Receivable

The Company entered into a purchase and sale agreement dated February 1, 2018, for the sale of the Devens facility (including land, building and building improvements) located at 64 Jackson Road, Devens, Massachusetts to 64 Jackson Road, LLC, a limited liability company, in the amount of $23.0 million. The terms for payment included a $1.0 million security deposit, and a note receivable for $6.0 million payable to the Company with the remaining cash net of certain adjustments for closing costs at the date of settlement. The note receivable is due in two$3.0 million installments plus accrued interest at a rate of 1.96% on March 31, 2019 and March 31, 2020. The note is subordinate to East Boston Savings Bank's mortgage on the Devens property.

The note receivable was discounted to its present value of $5.7 million utilizing a discount rate of 6%, which was based on management’s assessment of what an appropriate loan at current market rates would be. The $0.3 million discount was recorded as an offset to the long term portion of the note receivable, and is being amortized to interest income over the term of the note. In addition, the resulting gain of $0.1 million from the sale of the Devens property which was deferred previously was recorded as a component of the cumulative effect of an accounting change upon the adoption of ASU 2017-05 which was issued as a part of ASU 2014-09. This gain was recorded as an offset to the opening accumulated deficit.

Note receivable as of June 30, 2018 and March 31, 2018 consisted of the following (in thousands):

Current assets	June 30, 2018			March 31, 2018
Note receivable, current	$	3,000		$	3,000
Total current note receivable	$	3,000		$	3,000
Long term assets
Note receivable, long term	$	3,000		$	3,000
Note receivable discount	(280		)	(336		)
Deferred gain on sale	—			(105		)
Total long term note receivable	$	2,720		$	2,559

10. Property, Plant and Equipment

The cost and accumulated depreciation of property and equipment at June 30, 2018 and March 31, 2018 are as follows (in thousands):

	June 30, 2018			March 31, 2018
Construction in progress - equipment	528			654
Equipment and software	72,466			72,760
Furniture and fixtures	1,890			1,878
Leasehold improvements	1,632			1,426
Property, plant and equipment, gross	76,516			76,718
Less accumulated depreciation	(64,962		)	(64,205		)
Property, plant and equipment, net	$	11,554		$	12,513

Depreciation expense was $1.1 million and $4.2 million for the three months ended June 30, 2018 and 2017, respectively. Included in depreciation expense for the three months ended June 30, 2017 is $2.5 million of accelerated depreciation recorded to cost of revenues related to revised estimates of the remaining useful lives of certain pieces of manufacturing equipment. Construction in progress - equipment primarily includes capital investments in the Company's newly leased facility in Ayer, Massachusetts.

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11. Accounts Payable and Accrued Expenses

Accounts payable and accrued expenses at June 30, 2018 and March 31, 2018 consisted of the following (in thousands):

	June 30, 2018		March 31, 2018
Accounts payable	$	3,863	$	3,096
Accrued inventories in-transit	144		1,207
Accrued other miscellaneous expenses	1,999		2,412
Advanced deposits	2,729		—
Accrued compensation	4,348		3,605
Income taxes payable	309		536
Accrued warranty	1,752		1,769
Total	$	15,144	$	12,625

The Company generally provides a one to two year warranty on its products, commencing upon delivery or installation where applicable. A provision is recorded upon revenue recognition to cost of revenues for estimated warranty expense based on historical experience.

Product warranty activity was as follows (in thousands):

	Three months ended June 30,
	2018			2017
Balance at beginning of period	$	1,769		$	2,344
Change in accruals for warranties during the period	104			41
Settlements during the period	(121		)	(359		)
Balance at end of period	$	1,752		$	2,026

12. Income Taxes

The Company recorded an income tax benefit of less than $0.1 million in the three months ended June 30, 2018. The Company recorded income tax expense of $0.1 million in the three months ended June 30, 2017.  

On December 22, 2017, the Tax Cuts and Jobs Act of 2017 (the “Act”) was signed into law. ASC Topic 740 requires deferred tax assets and liabilities to be measured using the enacted rate for the period in which they are expected to reverse. Accordingly, the new 21% U.S. Federal corporate tax rate was used to measure the U.S. deferred tax assets and liabilities that will reverse in future periods. The Company's deferred tax attributes are generally subject to a full valuation allowance in the U.S. and thus, this adjustment to the attributes did not impact the tax provision. In addition, the new legislation includes a one-time transition tax in which all foreign earnings are deemed to be repatriated to the U.S. and taxable at specified rates included within the Act. The Company reviewed the accumulated foreign earnings aggregated across all non U.S. subsidiaries, net of foreign deficits. The Company believes it is in an aggregate net foreign deficit position for U.S. tax purposes and therefore not liable for the transition tax. The SEC staff issued Staff Accounting Bulletin No. 118, which provides guidance for companies that have not completed their accounting for the income tax effects of the Act in the period of enactment, allowing for a measurement period of up to one year after the enactment date to finalize the recording of the related tax impacts. The Company made reasonable estimates and does not anticipate significant revisions to the accounting for the tax impact of the Act, but has not completed the accounting for the tax effects of the Act at June 30, 2018. The Company will continue to assess its provision for income taxes as future guidance is issued, but does not currently anticipate significant revisions will be necessary. The ultimate impact may differ from the Company's provisional estimates, possibly materially, due to additional analysis, changes in interpretations and assumptions the Company has made, additional regulatory guidance that may be used and actions the Company may take as a result of the Act. The accounting is expected to be complete within the one year measurement period in accordance with the measurement period guidance outlined in Staff Accounting Bulletin No. 118.

Accounting for income taxes requires a two-step approach to recognizing and measuring uncertain tax positions.  The first step is to evaluate the tax position for recognition by determining if, based on the technical merits, it is more likely than not the position will be sustained upon audit, including resolution of related appeals or litigation processes, if any.  The second step is to measure the tax benefit as the largest amount that is more than 50% likely to be realized upon ultimate settlement.  The Company

16

re-evaluates these uncertain tax positions on a quarterly basis.  The evaluation is based on factors including, but not limited to, changes in facts or circumstances, changes in tax law, effectively settled issues under audit and new audit activity.  Any changes in these factors could result in the recognition of a tax benefit or an additional charge to the tax provision.  The Company did not identify any uncertain tax positions in the three months ended June 30, 2018 and did not have any gross unrecognized tax benefits as of March 31, 2018.

13. Warrants and Derivative Liabilities

The Company accounts for its warrants and contingent consideration as liabilities due to certain adjustment provisions within the instruments, which require that they be recorded at fair value. The warrants are subject to revaluation at each balance sheet date and any change in fair value is recorded as a change in fair value of warrants until the earlier of its expiration or its exercise at which time the warrant liability will be reclassified to equity. The Company calculated the fair value of the warrants utilizing an integrated lattice model. See Note 6, "Fair Value Measurements", for further discussion.

Hercules Warrants

The Company issued Hercules warrants to purchase 13,927 shares of common stock (the “First Warrant”) and 25,641 shares of common stock (the “Second Warrant”) in conjunction with prior term loans that have been repaid in full. On December 19, 2014, the Company entered into the Hercules Second Amendment. In conjunction with the agreement, the Company issued the Hercules Warrant to purchase 58,823 shares of the Company’s common stock.  The Hercules Warrant is exercisable at any time after its issuance at an exercise price of $7.85 per share, subject to certain price-based and other anti-dilution adjustments, including the equity offering in May 2017, the acquisition of ITC with common stock in September 2017 and sales of common stock under the ATM entered into in January 2017, and expires on June 30, 2020.  This warrant had a fair value of $0.1 million as of June 30, 2018 and March 31, 2018.

November 2014 Warrant

On November 13, 2014, the Company completed an offering of 909,090 units of the Company’s common stock with Hudson Bay Capital. Each unit consisted of one share of the Company’s common stock and 0.9 of a warrant to purchase one share of common stock, or a warrant to purchase in the aggregate 818,181 shares (the “November 2014 Warrant”).  The November 2014 Warrant is exercisable at any time, at an exercise price equal to $7.81 per share, subject to certain price-based and other anti-dilution adjustments including those noted above, and expires on November 13, 2019.  

Following is a summary of the key assumptions used to calculate the fair value of the November 2014 Warrant:

Fiscal Year 18	June 30, 2018
Risk-free interest rate	2.40%
Expected annual dividend yield	—
Expected volatility	67.40%
Term (years)	1.37
Fair value	$1.6 million

Fiscal Year 17	March 31, 2018	December 31, 2017	September 30, 2017	June 30, 2017
Risk-free interest rate	2.20%	1.87%	1.49%	1.44%
Expected annual dividend yield	—	—	—	—
Expected volatility	65.86%	65.86%	65.64%	67.21%
Term (years)	1.62	1.87	2.12	2.37
Fair value	$1.1 million	$0.4 million	$0.8 million	$0.9 million

The Company recorded a net loss of $0.5 million and a net gain of $0.9 million, resulting from an increase and decrease in the fair value of the November 2014 Warrant during the three months ended June 30, 2018 and 2017, respectively.

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14. Stockholders’ Equity

Equity Offerings

On May 5, 2017, the Company entered into an underwriting agreement with Oppenheimer & Co. Inc., as representative of several underwriters named therein, relating to the issuance and sale (the "Offering") of 4.0 million shares of the Company's common stock at a public offering price of $4.00 per share. The net proceeds to the Company from the Offering were approximately $14.7 million, after deducting underwriting discounts and commissions and offering expenses payable by the Company. The Offering closed on May 10, 2017. In addition, the Company granted the underwriters a 30-day option (the “Option”) to purchase up to an additional 600,000 shares of common stock at the public offering price. On May 24, 2017, the underwriters notified the Company that they had exercised their Option in full. The net proceeds to the Company from the Option were approximately $2.3 million, after deducting underwriting discounts and commissions and offering expenses payable by the Company. The total net proceeds to the Company from the Offering and the Option were approximately $17.0 million, after deducting underwriting discounts and commissions and offering expenses payable by the Company. The Option closed on May 26, 2017. In conjunction with the equity offering, the Company terminated a previous At Market Issuance Sales Agreement ("ATM) with FBR Capital Markets & Co. where the Company could, at its discretion, sell up to $10.0 million of the Company's common stock.

15. Commitments and Contingencies

Legal Contingencies

From time to time, the Company is involved in legal and administrative proceedings and claims of various types. The Company records a liability in its consolidated financial statements for these matters when a loss is known or considered probable and the amount can be reasonably estimated. The Company reviews these estimates each accounting period as additional information is known and adjusts the loss provision when appropriate. If a matter is both probable to result in a liability and the amounts of loss can be reasonably estimated, the Company estimates and discloses the possible loss or range of loss to the extent necessary to make the consolidated financial statements not misleading. If the loss is not probable or cannot be reasonably estimated, a liability is not recorded in its consolidated financial statements.

On July 3, 2018, the Company, AMSC China and AMSC Austria entered into the Settlement Agreement with Sinovel. The Settlement Agreement settles the litigation and arbitration proceedings between the Company and Sinovel listed on Schedule 2 of the Settlement Agreement (the “Proceedings”), and any other civil claims, counterclaims, causes of action, rights and obligations directly or indirectly relating to the subject matters of the Proceedings and the contracts between the Company and Sinovel listed on Schedules 1 and 4 of the Settlement Agreement (the “Contracts”), subject to the exception described in Section 1.1 of the Settlement Agreement. The Settlement Agreement was filed as Exhibit 10.1 to the Company’s Form 8-K filed with the Securities and Exchange Commission on July 9, 2018.

Under the terms of the Settlement Agreement, Sinovel has agreed to pay AMSC China an aggregate cash amount in Renminbi (RMB) equivalent to $57.5 million, consisting of two installments. Sinovel paid the first installment of $32.5 million on July 4, 2018, and has agreed to pay the second installment of $25.0 million (the “Second Payment”) within ten (10) months after the U.S. District Court for the Western District of Wisconsin (the “District Court”) delivers the first sentence against Sinovel in the criminal case entitled United States v. Sinovel Wind Co., Ltd., Case Number 3:13-cr-00084-jdp. On July 6, 2018, the District Court delivered such sentence, and therefore the Second Payment is due by May 6, 2019 (the “Second Payment Due Date”). Mr. Wenyuan Wei, former Sinovel chairman and a current Sinovel shareholder, has delivered a letter of guarantee (the “Guarantee”) to the Company for the Second Payment should Sinovel fail to make such payment by the Second Payment Due Date.

In addition, pursuant to the terms of the Settlement Agreement, the Company and AMSC Austria have granted Sinovel a non-exclusive license for certain AMSC intellectual property to be used solely in Sinovel’s doubly fed wind turbines (the “License”). AMSC has agreed not to sue Sinovel, Sinovel’s power converter suppliers or Sinovel’s customers for use of the technology covered by the License. In the event that Sinovel or Mr. Wei does not make the Second Payment by the Second Payment Due Date, the Settlement Agreement provides that the License will terminate.

The Company and Sinovel have submitted withdrawal applications to terminate the Proceedings to the relevant Chinese courts and the Beijing Arbitration Commission. Subject to the Company and Sinovel complying with the terms of the Settlement Agreement, the Company and Sinovel have agreed not to re-institute any of the Proceedings. In addition, the Company and Sinovel have agreed to a mutual release and covenant not to sue covering all subject matters of the Proceedings and Contracts, effective upon the completion of the Second Payment.

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Other

The Company enters into long-term construction contracts with customers that require the Company to obtain performance bonds. The Company is required to deposit an amount equivalent to some or all the face amount of the performance bonds into an escrow account until the termination of the bond. When the performance conditions are met, amounts deposited as collateral for the performance bonds are returned to the Company. In addition, the Company has various contractual arrangements in which minimum quantities of goods or services have been committed to be purchased on an annual basis.

As of June 30, 2018, the Company had $0.2 million of restricted cash included in long-term assets. These amounts included in restricted cash primarily represent deposits to secure letters of credit for various supply contracts. These deposits are held in interest bearing accounts.

16. Restructuring

The Company accounts for charges resulting from operational restructuring actions in accordance with ASC Topic 420, Exit or Disposal Cost Obligations (“ASC 420”) and ASC Topic 712, Compensation—Nonretirement Postemployment Benefits (“ASC 712”). In accounting for these obligations, the Company is required to make assumptions related to the amounts of employee severance, benefits, and related costs and the time period over which leased facilities will remain vacant, sublease terms, sublease rates and discount rates. Estimates and assumptions are based on the best information available at the time the obligation arises. These estimates are reviewed and revised as facts and circumstances dictate; changes in these estimates could have a material effect on the amount accrued on the consolidated balance sheet.

The $0.3 million charged to operations in the three months ended June 30, 2018 is related to exit costs incurred for the move of the Company's corporate office.

On April 3, 2017, the Board of Directors approved a plan to reduce the Company’s global workforce by approximately 8%, effective April 4, 2017. The purpose of the workforce reduction was to reduce operating expenses to better align with the Company’s current revenues. Included in the $1.3 million severance pay, charged to operations in the three months ended June 30, 2017, is $0.5 million of severance pay for one of the Company's former executive officers pursuant to the terms of a severance agreement dated June 30, 2017. Under the terms of the severance agreement, the Company's former executive officer is entitled to 18 months of his base salary, which is expected to be paid by December 31, 2018. From and after January 1, 2018, the Company, at its discretion, may settle any remaining unpaid cash severance owed to its former executive officer through the issuance of a number of immediately vested shares of the Company’s common stock, determined by multiplying the remaining unpaid cash severance owed by 120%, and then dividing by the closing stock price per share of the Company's common stock as of the last business day prior to the issuance of the shares.

All amounts related to these restructuring activities are expected to be paid by December 31, 2018.

The following table presents restructuring charges and cash payments for the three months ended June 30, 2018 and 2017(in thousands):

	Severance pay			Facility exit and
	and benefits			Relocation costs			Total
Accrued restructuring balance at April 1, 2018	$	262		$	173		$	435
Charges to operations	—			310			310
Cash payments	(97		)	(483		)	(580		)
Accrued restructuring balance at June 30, 2018	$	165		$	—		$	165

	Severance pay			Facility exit and
	and benefits			Relocation costs		Total
Accrued restructuring balance at April 1, 2017	$	—		$	—	$	—
Charges to operations	1,339			—		1,339
Cash payments	(423		)	—		(423		)
Accrued restructuring balance at June 30, 2017	$	916		$	—	$	916

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All restructuring charges discussed above are included within restructuring in the Company’s unaudited condensed consolidated statements of operations. The Company includes accrued restructuring within accounts payable and accrued expenses.

17. Business Segments

The Company reports its financial results in two reportable business segments: Wind and Grid.

Through the Company’s Windtec Solutions, the Wind business segment enables manufacturers to field wind turbines with exceptional power output, reliability and affordability. The Company supplies advanced power electronics and control systems, licenses its highly engineered wind turbine designs, and provides extensive customer support services to wind turbine manufacturers. The Company’s design portfolio includes a broad range of drive trains and power ratings of 2 megawatts ("MWs") and higher. The Company provides a broad range of power electronics and software-based control systems that are highly integrated and designed for optimized performance, efficiency, and grid compatibility.

Through the Company’s Gridtec Solutions, the Grid business segment enables electric utilities and renewable energy project developers to connect, transmit and distribute power with exceptional efficiency, reliability and affordability. The sales process is enabled by transmission planning services that allow it to identify power grid congestion, poor power quality and other risks, which helps the Company determine how its solutions can improve network performance. These services often lead to sales of grid interconnection solutions for wind farms and solar power plants, power quality systems, and transmission and distribution cable systems. The Company also sells ship protection products to the U.S. Navy through its Grid business segment.

The operating results for the two business segments are as follows (in thousands):

	Three months ended June 30,
	2018		2017
Revenues:
Wind	$	3,678	$	2,278
Grid	8,929		6,645
Total	$	12,607	$	8,923

	Three months ended June 30,
	2018			2017
Operating loss:
Wind	$	(1,367	)	$	(4,433	)
Grid	(2,666		)	(8,167		)
Unallocated corporate expenses	(1,095		)	(2,093		)
Total	$	(5,128	)	$	(14,693	)

The accounting policies of the business segments are the same as those for the consolidated Company. The Company’s business segments have been determined in accordance with the Company’s internal management structure, which is organized based on operating activities. The Company evaluates performance based upon several factors, of which the primary financial measures are segment revenues and segment operating loss. The disaggregated financial results of the segments reflect allocation of certain functional expense categories consistent with the basis and manner in which Company management internally disaggregates financial information for the purpose of assisting in making internal operating decisions. In addition, certain corporate expenses which the Company does not believe are specifically attributable or allocable to either of the two business segments have been excluded from the segment operating loss.

Unallocated corporate expenses primarily consist of stock-based compensation expense of $0.8 million and $0.8 million in the three months ended June 30, 2018 and 2017, respectively. Additionally, restructuring charges of $0.3 million and $1.3 million are included in the three months ended June 30, 2018 and 2017, respectively.

Total assets for the two business segments as of June 30, 2018 and March 31, 2018 are as follows (in thousands):

20

	June 30, 2018		March 31, 2018
Wind	$	14,830	$	16,790
Grid	42,701		37,012
Corporate assets	26,915		34,373
Total	$	84,446	$	88,175

18. Recent Accounting Pronouncements

In May 2014, the Financial Accounting Standards Board (“FASB”) and the International Accounting Standards Board ("IASB") issued, ASU 2014-09, Revenue from Contracts with Customers (Topic 606). The guidance substantially converges final standards on revenue recognition between the FASB and IASB providing a framework on addressing revenue recognition issues and, upon its effective date, replaces almost all existing revenue recognition guidance, including industry-specific guidance, in current U.S. generally accepted accounting principles. The FASB has subsequently issued multiple amendments to ASU 2014-09 which are all effective for annual reporting periods beginning after December 15, 2017. 

As of April 1, 2018, the Company has adopted ASU 2014-09 and its amendments, reported the impact in its consolidated financial statements, and has implemented changes to its business processes, systems and controls to support revenue recognition and the related disclosures under this ASU. The Company’s assessment included a detailed review of representative contracts from each of the Company’s revenue streams and a comparison of its historical accounting policies and practices to the new standard. The Company adopted the new standards retrospectively with the cumulative effect of initially applying the guidance recognized at the date of initial application (the modified retrospective transition method) to all existing contracts that have remaining obligations as of April 1, 2018. Accordingly, the Company has elected to retroactively adjust only those contracts that do not meet the definition of a complete contract at the date of the initial application. This guidance will lead to recognizing certain revenue transactions sooner than in the past on certain contracts, as the Company will need to estimate the revenue it will be entitled to upon contract completion, and later on other contracts, such as Consulting and Statement of Work transactions, due to the lack of an enforceable right to payment for performance obligations satisfied over time. There are no changes in the accounting for its largest revenue stream which includes Inox Wind Ltd as its primary customer. Across other revenue streams such as DVAR Equipment and DVAR Turnkey, the timing of revenue recognition will be affected for multiple types of contracts, primarily multiple performance obligation contracts in its Grid business unit, but those differences did not have a material impact on its consolidated financial statements. The adjustment to opening accumulated deficit was not significant in the period commencing on April 1, 2018. Additionally, the adoption of this new standard is not expected to have any tax impact on the consolidated financial statements. As part of this analysis, the Company evaluated its information technology capabilities and systems, and did not incur significant information technology costs to modify systems currently in place.

In January 2016, the FASB issued ASU 2016-01, Financial Instruments-Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities.  The amendments in ASU 2016-01 will enhance the reporting model for financial instruments to provide users of financial statements with more decision-useful information. This ASU is effective for annual reporting periods beginning after December 15, 2017, and interim periods within those fiscal years.  The Company adopted ASU 2016-01 effective April 1, 2018 and noted no significant impact to its consolidated financial statements.

In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842). The guidance in this ASU supersedes the leasing guidance in Topic 840, Leases. Under the new guidance, lessees are required to recognize lease assets and lease liabilities on the balance sheet for all leases with terms longer than 12 months. Leases will be classified as either finance or operating, with classification affecting the pattern of expense recognition in the income statement.

• In July 2018, the FASB issued ASU 2018-10, Codification improvements to Topic 842, Leases. The amendments in ASU 2018-10 provide more clarification in regards to the application and requirements of ASU 2016-02.

This ASU and its amendments are effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. A modified retrospective transition approach is required for lessees for capital and operating leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements, with certain practical expedients available. The Company is currently evaluating the effects adoption of this guidance will have on its consolidated financial statements.

In June 2016, the FASB issued ASU 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. The amendments in ASU 2016-13 will provide more decision-useful information about the

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expected credit losses on financial instruments and other commitments to extend credit held by a reporting entity at each reporting date. The ASU is effective for annual reporting periods beginning after December 15, 2019, including interim periods within that year.  The Company is currently evaluating the impact, if any, the adoption of ASU 2016-13 may have on its consolidated financial statements.

In 2016, the FASB issued the following two ASU's on Statement of Cash Flows (Topic 230). Both amendments are effective for annual reporting periods beginning after December 15, 2017, including interim periods within that year.

• In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments. The amendments in ASU 2016-15 provide more guidance towards the classification of multiple different types of cash flows in order to reduce the diversity in reporting across entities.

• In November 2016, the FASB issued ASU 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash. The amendments in ASU 2016-18 explain the change during the period in the total of cash, cash equivalents, and amounts generally described as restricted cash or restricted cash equivalents. Therefore, amounts generally described as restricted cash and restricted cash equivalents should be included with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the statement of cash flows.

The Company adopted ASU 2016-15 and ASU 2016-18 effective April 1, 2018 and noted no significant impact to its consolidated financial statements.

In October 2016, the FASB issued ASU 2016-16, Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory. The amendments in ASU 2016-16 will improve the accounting for the income tax consequences of intra-entity transfers of assets other than inventory. The ASU is effective for annual reporting periods beginning after December 15, 2017, including interim periods within that year.  The Company adopted ASU 2016-16 effective April 1, 2018 and noted no significant impact to its consolidated financial statements.

In January 2017, the FASB issued ASU 2017-03, Accounting Changes and Error Corrections (Topic 250) and Investments - Equity Method and Joint Ventures. The amendments in ASU 2017-03 provide additional detail surrounding disclosures required related to adoption of new pronouncements. The ASU is effective for the periods of each related pronouncement.  The Company is currently evaluating the impact the adoption of ASU 2017-03 may have on its consolidated financial statements.

In February 2017, the FASB issued ASU 2017-05, Other Income - Gains and Losses from the Derecognition of Non-financial Assets (Subtopic 610-20). The amendments in ASU 2017-05 clarify the scope of Subtopic 610-20, Other Income-Gains and Losses from the Derecognition of Non-financial Assets, and to add guidance for partial sales of non-financial assets. Subtopic 610-20, which was issued in May 2014 as a part of ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606), provides guidance for recognizing gains and losses from the transfer of non-financial assets in contracts with non-customers.  The Company adopted ASU 2017-05 effective April 1, 2018 and adjusted the opening balance of accumulated deficit for $0.1 million for recognition of the deferred gain on the sale of the 64 Jackson Road building that occurred on March 28, 2018.

In May 2017, the FASB issued ASU 2017-09, Compensation - Stock Compensation (Subtopic 718) Scope of Modification Accounting. The amendments in ASU 2017-09 provide clarity and reduce both (1) diversity in practice and (2) cost and complexity when applying the guidance in Topic 718, Compensation—Stock Compensation, to a change to the terms or conditions of a share-based payment award.  The ASU is effective for annual reporting periods beginning after December 15, 2017, including interim periods within those periods. The Company adopted ASU 2017-09 effective April 1, 2018 and noted no significant impact to its consolidated financial statements.

In July 2017, the FASB issued ASU 2017-11, Earnings per Share (Topic 260), Distinguishing Liabilities from Equity (Topic 480), and Derivatives and Hedging (Topic 815). The amendments in ASU 2017-11 provide guidance for freestanding equity-linked financial instruments, such as warrants and conversion options in convertible debt or preferred stock, and should no longer be accounted for as a derivative liability at fair value as a result of the existence of a down round feature. The ASU is effective for annual reporting periods beginning after December 15, 2018, including interim periods within those periods. The Company is currently evaluating the impact the adoption of ASU 2017-11 may have on its consolidated financial statements.

In August 2017, the FASB issued ASU 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities. The amendments in ASU 2017-12 provide improved financial reporting of hedging relationships to better portray the economic results of an entity’s risk management activities in its financial statements. In addition, the amendments in this update make certain targeted improvements to simplify the application of the hedge accounting guidance. The ASU is effective

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for annual reporting periods beginning after December 15, 2018, including interim periods within those periods. The Company is currently evaluating the impact the adoption of ASU 2017-12 may have on its consolidated financial statements.

In June 2018, the FASB issued ASU 2018-07, Compensation - Stock Compensation (Topic 718): Improvements to Non-Employee Share Based Payment Accounting. The amendments in ASU 2018-07 provide for the simplification of the measurement of share-based payment transactions for acquiring goods and services from non-employees. The ASU is effective for annual reporting periods beginning after December 15, 2018, including interim periods within those periods. The Company is currently evaluating the impact the adoption of ASU 2018-07 may have on its consolidated financial statements.

19. Subsequent Events

The Company has performed an evaluation of subsequent events through the time of filing this Quarterly Report on Form 10-Q with the SEC, apart from the Settlement Agreement with Sinovel described in Note 15, "Commitments and Contingencies," the Company has determined that there are no such events to report.

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AMERICAN SUPERCONDUCTOR CORPORATION

MANAGEMENT’S DISCUSSION AND ANALYSIS OF

FINANCIAL CONDITION AND RESULTS OF OPERATIONS

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

This Quarterly Report on Form 10-Q contains forward-looking statements within the meaning of Section 21E of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). For this purpose, any statements contained herein that relate to future events or conditions, including without limitation, the statements in Part II, “Item 1A. Risk Factors” and in Part I under “Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations” and located elsewhere herein regarding industry prospects, our prospective results of operations or financial position, and anticipated payments from Sinovel may be deemed to be forward-looking statements. Without limiting the foregoing, the words “believes,” “anticipates,” “plans,” “expects,” and similar expressions are intended to identify forward-looking statements. Such forward-looking statements represent management’s current expectations and are inherently uncertain.  There are a number of important factors that could materially impact the value of our common stock or cause actual results to differ materially from those indicated by such forward-looking statements. These important factors include, but are not limited to: Sinovel may not make the Second Payment (as defined herein) in the timeframe expected, or at all, and the guarantor may also fail to make the Second Payment; The relevant Chinese courts and the Beijing Arbitration Commission may not accept any re-filing by us of any proceeding with Sinovel; A significant portion of our revenues are derived from a single customer, Inox, and we cannot predict if and when Inox’s demand dislocation will be resolved, and to the extent resolved, how successful Inox will be under India’s new central and state auction regime; We have a history of operating losses and negative operating cash flows, which may continue in the future and require us to secure additional financing in the future; Our operating results may fluctuate significantly from quarter to quarter and may fall below expectations in any particular fiscal quarter; Our financial condition may have an adverse effect on our customer and supplier relationships; Lower prices for other fuel sources may reduce the demand for wind energy development, which could have a material adverse effect on our ability to grow our Wind business. Our success in addressing the wind energy market is dependent on the manufacturers that license our designs; Our success is dependent upon attracting and retaining qualified personnel and our inability to do so could significantly damage our business and prospects; We rely upon third-party suppliers for the components and sub-assemblies of many of our Wind and Grid products, making us vulnerable to supply shortages and price fluctuations, which could harm our business; Failure to successfully execute the move of our former Devens, Massachusetts manufacturing facility or achieve expected savings following the move could adversely impact our financial performance; We may not realize all of the sales expected from our backlog of orders and contracts; Our success depends upon the commercial use of high temperature superconductor products, which is currently limited, and a widespread commercial market for our products may not develop; Growth of the wind energy market depends largely on the availability and size of government subsidies, economic incentives and legislative programs designed to support the growth of wind energy; Our contracts with the U.S. government are subject to audit, modification or termination by the U.S. government and include certain other provisions in favor of the government, and additional funding of such contracts may not be approved by the U.S. Congress; Tax reform in the U.S. may negatively affect our operating results; We have operations in and depend on sales in emerging markets, including India, and global conditions could negatively affect our operating results or limit our ability to expand our operations outside of these markets; Our business and operations would be adversely impacted in the event of a failure or security breach of our information technology infrastructure; If we fail to maintain proper and effective internal control over financial reporting, our ability to produce accurate and timely financial statements could be impaired and may lead investors and other users to lose confidence in our financial data; We face risks related to our intellectual property; We face risks related to our legal proceedings; We face risks relating to our settlement with Sinovel; and the important factors discussed under the caption "Risk Factors" in Part 1. Item 1A of our Form 10-K for the fiscal year ended March 31, 2018, Part II. Item 1A of this Quarterly Report on Form 10-Q and our other reports filed with the SEC. These and the important factors discussed under the caption “Risk Factors” in Part 1. Item 1A of our Form 10-K for the fiscal year ended March 31, 2018 and under Part II. Item IA of this Quarterly Report on Form 10-Q among others, could cause actual results to differ materially from those indicated by forward-looking statements made herein and presented elsewhere by management from time to time. Any such forward-looking statements represent management’s estimates as of the date of this Quarterly Report on Form 10-Q. While we may elect to update such forward-looking statements at some point in the future, we disclaim any obligation to do so, even if subsequent events cause our views to change. These forward-looking statements should not be relied upon as representing our views as of any date subsequent to the date of this Quarterly Report on Form 10-Q.

American Superconductor®, Amperium®, AMSC®, D-VAR®, PowerModule™, D-VAR® VVO, PQ-IVR®, SeaTitan™, Gridtec Solutions™, Windtec Solutions™ and Smarter, Cleaner...Better Energy™ are trademarks or registered trademarks of American Superconductor Corporation or our subsidiaries. We reserve all of our rights with respect to our trademarks or registered trademarks regardless of whether they are so designated in this Quarterly Report on Form 10-Q by an ® or ™ symbol. All other

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brand names, product names, trademarks or service marks appearing in this Quarterly Report on Form 10-Q are the property of their respective holders.

Executive Overview

We are a leading provider of megawatt-scale solutions that lower the cost of wind power and enhance the performance of the power grid. In the wind power market, we enable manufacturers to field highly competitive wind turbines through our advanced power electronics products, engineering, and support services. In the power grid market, we enable electric utilities and renewable energy project developers to connect, transmit and distribute power through our transmission planning services and power electronics and superconductor-based products. Our wind and power grid products and services provide exceptional reliability, security, efficiency and affordability to our customers.

Our wind and power grid solutions help to improve energy efficiency, alleviate power grid capacity constraints and increase the adoption of renewable energy generation. Demand for our solutions is driven by the growing needs for renewable sources of electricity, such as wind and solar energy, and for modernized smart grids that improve power reliability, security and quality. Concerns about these factors have led to increased spending by corporations as well as supportive government regulations and initiatives on local, state, national and global levels, including renewable portfolio standards, tax incentives and international treaties.  

We manufacture products using two proprietary core technologies: PowerModule programmable power electronic converters and our Amperium high temperature superconductor (“HTS”) wires. These technologies and our system-level solutions are protected by a broad and deep intellectual property portfolio consisting of hundreds of patents and licenses worldwide.

We operate our business under two market-facing business units: Wind and Grid. We believe this market-centric structure enables us to more effectively anticipate and meet the needs of wind turbine manufacturers, power generation project developers and electric utilities.

• Wind. Through our Windtec Solutions™, our Wind business segment enables manufacturers to field wind turbines with exceptional power output, reliability and affordability. We supply advanced power electronics and control systems, license our highly engineered wind turbine designs, and provide extensive customer support services to wind turbine manufacturers. Our design portfolio includes a broad range of drive trains and power ratings of 2 megawatts (“MW”) and higher. We provide a broad range of power electronics and software-based control systems that are highly integrated and designed for optimized performance, efficiency, and grid compatibility.

• Grid. Through our Gridtec Solutions™, our Grid business segment enables electric utilities and renewable energy project developers to connect, transmit and distribute power with exceptional efficiency, reliability, security and affordability. We provide transmission planning services that allow us to identify power grid congestion, poor power quality, and other risks, which help us determine how our solutions can improve network performance. These services often lead to sales of our grid interconnection solutions for wind farms and solar power plants, power quality systems and transmission and distribution cable systems.  We also sell ship protection products to the U.S. Navy through our Grid business segment.

Our fiscal year begins on April 1 and ends on March 31. When we refer to a particular fiscal year, we are referring to the fiscal year beginning on April 1 of that same year. For example, fiscal 2018 refers to the fiscal year beginning on April 1, 2018. Other fiscal years follow similarly.

On July 3, 2018, we and our wholly-owned subsidiaries Suzhou AMSC Superconductor Co. Ltd. (“AMSC China”) and AMSC Austria GMBH (“AMSC Austria”) entered into a settlement agreement (the “Settlement Agreement”) with Sinovel Wind Group Co., Ltd. (“Sinovel”). The Settlement Agreement settles the litigation and arbitration proceedings between us and Sinovel listed on Schedule 2 of the Settlement Agreement (the “Proceedings”), and any other civil claims, counterclaims, causes of action, rights and obligations directly or indirectly relating to the subject matters of the Proceedings and the contracts between us and Sinovel listed on Schedules 1 and 4 of the Settlement Agreement (the “Contracts”), subject to the exception described in Section 1.1 of the Settlement Agreement. The Settlement Agreement was filed as Exhibit 10.1 to the Company’s Form 8-K filed with the Securities and Exchange Commission on July 9, 2018. Under the terms of the Settlement Agreement, Sinovel agreed to pay AMSC China an aggregate cash amount in Renminbi (RMB) equivalent to $57.5 million, consisting of two installments. Sinovel paid the first installment of $32.5 million on July 4, 2018, and has agreed to pay the second installment of $25.0 million (the “Second Payment”) within ten (10) months after the U.S. District Court for the Western District of Wisconsin (the “District Court”) delivers the first sentence against Sinovel in the criminal case entitled United States v. Sinovel Wind Co., Ltd., Case Number 3:13-cr-00084-jdp. On July 6, 2018, the District Court delivered such sentence, and therefore the Second Payment is due by May 6, 2019. Mr.

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Wenyuan Wei, former Sinovel chairman and a current Sinovel shareholder, has delivered a letter of guarantee to us for the Second Payment should Sinovel fail to make such payment by the Second Payment Due Date.

In addition, pursuant to the terms of the Settlement Agreement, we and AMSC Austria have granted Sinovel a non-exclusive license for certain of our intellectual property to be used solely in Sinovel’s doubly fed wind turbines (the “License”). We have agreed not to sue Sinovel, Sinovel’s power converter suppliers or Sinovel’s customers for use of the technology covered by the License. In the event that Sinovel or Mr. Wei does not make the Second Payment by the Second Payment Due Date, the Settlement Agreement provides that the License will terminate. See Note 15 “Commitments and Contingencies” for additional information on the terms of the Settlement Agreement.

On July 25, 2018, we received notice from BASF Corporation (“BASF”) that BASF will not be extending the term of the Joint Development Agreement dated March 4, 2016 (“JDA”) by and between BASF and us beyond March 3, 2019. As a result, BASF will not be required to pay $1.0 million in 2019 to us as otherwise would have been required pursuant to the terms of the JDA. To date, BASF has paid $6.0 million to us under the JDA.

Critical Accounting Policies and Estimates

The preparation of the unaudited condensed consolidated financial statements requires that we make estimates and judgments that affect the reported amounts of assets, liabilities, revenues and expenses, and related disclosure of contingent assets and liabilities. We base our estimates on historical experience and various other assumptions that are believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results may differ under different assumptions or conditions. During the three months ended June 30, 2018, we adopted ASU 2014-09, which provides for new requirements in regards to revenue recognition. See Note 2, "Revenue Recognition" for further details. Aside from the adoption of ASU 2014-09, there were no significant changes in the critical accounting policies that were disclosed in our Form 10-K for fiscal 2017, which ended on March 31, 2018.

Results of Operations

Three months ended June 30, 2018 compared to the three months ended June 30, 2017

Revenues

Total revenues increased 41% to $12.6 million for the three months ended June 30, 2018, compared to $8.9 million for the three months ended June 30, 2017.  Our revenues are summarized as follows (in thousands):

	Three months ended June 30,
	2018		2017
Revenues:
Wind	$	3,678	$	2,278
Grid	8,929		6,645
Total	$	12,607	$	8,923

Our Wind business unit accounted for 29% of total revenues for the three months ended June 30, 2018, compared to 26% for the three months ended June 30, 2017. Revenues in the Wind business unit increased 61% to $3.7 million in the three months ended June 30, 2018, from $2.3 million in the three months ended June 30, 2017. Wind business unit revenues increased due to increased ECS shipments to Inox during the period. Although shipments to Inox increased during the three months ended June 30, 2018 compared to the three months ended June 30, 2017, Inox has experienced a reduction in demand for the past several quarters that we believe has been caused by the transition in India from a local fixed tariff policy regime to a central and state government auction regime, which has had an adverse impact on the Wind industry in India. We cannot predict if and when this demand dislocation will be fully resolved, and to the extent resolved, how successful Inox will be under the new central and state auction regime.

Our Grid business unit accounted for 71% of total revenues for the three months ended June 30, 2018, compared to 74% for the three months ended June 30, 2017. Our Grid business unit revenues increased 34% to $8.9 million in the three months ended June 30, 2018, from $6.6 million in the three months ended June 30, 2017. Grid business unit revenues increased primarily due to higher D-VAR system revenues.   

The following table sets forth customers who represented 10% or more of our total revenues for the three months ended June 30, 2018 and 2017:

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	Reportable	Three months ended June 30,
	Segment	2018		2017
Inox Wind Limited	Wind	25	%	22	%
Vestas	Grid	36	%	—	%
U.S. Navy	Grid	<10%		35	%

Cost of Revenues and Gross Margin

Cost of revenues decreased by 35% to $8.7 million for the three months ended June 30, 2018, compared to $13.4 million for the three months ended June 30, 2017. Gross margin was 31% for the three months ended June 30, 2018, compared to (50)% for the three months ended June 30, 2017. The increase in the gross margin was due to increased revenue at a more favorable product mix in both business units compared to the prior year period along with accelerated depreciation in the prior year period related to revised estimates of the remaining lives on certain pieces of manufacturing equipment, as well as reduced fixed factory overhead as a result of the factory move to our newly leased Ayer facility.

Operating Expenses

Research and development

R&D expenses increased in the three months ended June 30, 2018 by 5% to $2.8 million from $2.7 million for the three months ended June 30, 2017.  The increase in R&D expenses was primarily due to higher compensation expense.

Selling, general, and administrative

SG&A expenses decreased by 6% to $5.8 million in the three months ended June 30, 2018, from $6.1 million in the three months ended June 30, 2017. The decrease in SG&A expenses was due primarily to reduced overall compensation expense.

Amortization of acquisition related intangibles

We recorded amortization expense related to our core technology and know-how, trade names and trademark intangible assets of less than $0.1 million in each of the three months ended June 30, 2018 and 2017.

Restructuring

We recorded $0.3 million for facility exit costs in the three months ended June 30, 2018 as a result of the move of the corporate office that was announced as part of our April 4, 2017 approved restructuring plan. We recorded a restructuring charge of $1.3 million for severance costs in the three months ended June 30, 2017 as a result of the reduction in force also announced on April 4, 2017. Included in the $1.3 million severance pay charged to operations in the three months ended June 30, 2017, is $0.5 million of severance pay for one of our former executive officers pursuant to the terms of a severance agreement dated June 30, 2017. Under the terms of the severance agreement, our former executive officer is entitled to eighteen months of his base salary, which is expected to be paid by December 31, 2018. From and after January 1, 2018, at our discretion, we may settle any remaining unpaid cash severance owed to our former executive officer through the issuance of a number of immediately vested shares of our common stock, determined by multiplying the remaining unpaid cash severance owed by 120%, and then dividing by the closing stock price per share of our common stock as of the last business day prior to the issuance of the shares.

Operating loss

Our operating loss is summarized as follows (in thousands):

	Three months ended June 30,
	2018			2017
Operating loss:
Wind	$	(1,367	)	$	(4,433	)
Grid	(2,666		)	(8,167		)
Unallocated corporate expenses	(1,095		)	(2,093		)
Total	$	(5,128	)	$	(14,693	)

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Our Wind segment generated operating losses of $1.4 million in the three months ended June 30, 2018, compared to $4.4 million in the three months ended June 30, 2017. The decrease in the Wind business unit operating loss was due primarily to increased shipments of ECS to Inox.

Our Grid segment generated operating losses of $2.7 million in the three months ended June 30, 2018, compared to $8.2 million in the three months ended June 30, 2017. The decrease in the Grid business unit operating loss was due primarily to increased D-VAR revenues compared to the prior year period as well as decreased costs as noted above.

Unallocated corporate expenses primarily consist of stock-based compensation expense of $0.8 million and restructuring charges of $0.3 million for the three months ended June 30, 2018, and $0.8 million of stock based compensation expense and $1.3 million of restructuring charges, primarily for severance costs as a result of the restructuring action announced on April 4, 2017, in the three months ended June 30, 2017.

Change in fair value of warrants

The change in fair value of warrants resulted in a loss of $0.5 million in the three months ended June 30, 2018, compared to a gain of $0.9 million in the three months ended June 30, 2017. The change in the fair value was primarily driven by changes in stock price, which is a key valuation metric.

Interest income (expense), net

Interest income (expense), net, was income of     less than $0.2 million in the three months ended June 30, 2018, compared to expense of less than $0.1 million in the three months ended June 30, 2017. The increase in interest income was primarily related to imputed interest earned in relation to the outstanding note receivable for the sale of the 64 Jackson Road building.

Other income (expense), net

Other income (expense), net, was income of $0.6 million in the three months ended June 30, 2018, compared to expense of $1.4 million in the three months ended June 30, 2017.  The increase in other income, net, during the three months ended June 30, 2018, was primarily driven by higher foreign currency gains.  

Income Taxes

Income tax benefit was less than $0.1 million in the three months ended June 30, 2018, compared to income tax expense of $0.1 million in the three months ended June 30, 2017. The increase in income tax benefit was primarily due to taxes earned in our foreign locations.

Non-GAAP Measures

Generally, a non-GAAP financial measure is a numerical measure of a company’s performance, financial position or cash flow that either excludes or includes amounts that are not normally excluded or included in the most directly comparable measure calculated and presented in accordance with GAAP. The non-GAAP measures included in this Form 10-Q, however, should be considered in addition to, and not as a substitute for or superior to the comparable measure prepared in accordance with GAAP.

We define non-GAAP net loss as net loss before stock-based compensation, amortization of acquisition-related intangibles, consumption of zero cost-basis inventory, changes in fair value of warrants, non-cash interest expense, tax effect of adjustments, and the other non-cash or unusual charges, indicated in the table below. We believe non-GAAP net loss assists management and investors in comparing our performance across reporting periods on a consistent basis by excluding these non-cash or non-recurring charges that we do not believe are indicative of our core operating performance. A reconciliation of GAAP to non-GAAP net loss is set forth in the table below (in thousands, except per share data):

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	Three months ended June 30,
	2018			2017
Net loss	$	(4,737	)	$	(15,252	)
Stock-based compensation	785			754
Amortization of acquisition-related intangibles	85			13
Consumption of zero cost-basis inventory	(249		)	(57		)
Change in fair value of warrants	464			(925		)
Non-cash interest expense	—			19
Tax effect of adjustments	40			9
Non-GAAP net loss	$	(3,612	)	$	(15,439	)
Non-GAAP net loss per share	$	(0.18	)	$	(0.92	)
Weighted average shares outstanding - basic and diluted	20,167			16,778

We incurred non-GAAP net losses of $3.6 million or $0.18 per share, for the three months ended June 30, 2018, compared to non-GAAP net losses of $15.4 million or $0.92 per share for the three months ended June 30, 2017. The decrease in non-GAAP net loss was driven primarily by a decrease in net loss, as previously discussed.

Liquidity and Capital Resources

We have experienced recurring operating losses and as of June 30, 2018 had an accumulated deficit of $993.0 million. In addition, we have experienced recurring negative operating cash flows, which continued in the three months ended June 30, 2018. Although our sales to Inox increased in the three months ended June 30, 2018 compared to the three months ended June 30, 2017, we cannot predict if and when Inox's demand dislocation will be fully resolved and to the extent resolved, how successful Inox will be under the new central and state auction regime.

Our cash requirements depend on numerous factors, including if and when the Inox demand dislocation is fully resolved, whether Inox is successful under the new central and state auction regime, our ability to collect the Second Payment from Sinovel, the successful completion of our product development activities, our ability to commercialize our Resilient Electric Grid (“REG”) and ship protection system solutions, rate of customer and market adoption of our products, collecting receivables according to established terms, and the continued availability of U.S. government funding during the product development phase of our Superconductors-based products. We continue to closely monitor our expenses and, if required, expect to further reduce our operating and capital spending to enhance liquidity.

As of June 30, 2018, we had cash, cash equivalents, and restricted cash of $26.9 million, compared to $34.2 million as of March 31, 2018, a decrease of $7.3 million. On July 4, 2018, Sinovel paid AMSC China an aggregate cash amount in Renminbi (RMB) equivalent to $32.5 million pursuant to the terms of the Settlement Agreement. On July 24, 2018, AMSC China paid $30.7 million to AMSC Austria to settle outstanding intercompany balances.Our cash and cash equivalents, and restricted cash are summarized as follows (in thousands):

	June 30, 2018		March 31, 2018
Cash and cash equivalents	$	26,750	$	34,084
Restricted cash	165		165
Total cash, cash equivalents, and restricted cash	$	26,915	$	34,249

As of June 30, 2018, we had approximately $0.8 million of cash, cash equivalents, and restricted cash in foreign bank accounts. As discussed above, the $30.7 million payment from AMSC China to AMSC Austria on July 24, 2018 is held in a foreign bank account.

For the three months ended June 30, 2018, net cash used in operating activities was $6.9 million compared to $5.4 million of cash used for the three months ended June 30, 2017. The increase in net cash used in operations was due primarily to an increase in accounts receivable in the three months ended June 30, 2018 compared to the prior year period.

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For the three months ended June 30, 2018, net cash used in investing activities was $0.2 million, compared to $0.1 million for the three months ended June 30, 2017. The increase in net cash used in investing activities was due primarily to increased purchases of property, plant and equipment compared to the prior year period.  

For the three months ended June 30, 2018, net cash used in financing activities was $0.2 million compared to net cash provided by financing activities of $15.1 million in the three months ended June 30, 2017. The decrease in net cash provided by financing activities was primarily due to net proceeds of $17.0 million from the issuance of 4.6 million shares of common stock in May 2017, with no such equity offering in the current year period.  See the discussion regarding the May 2017 equity offering below. 

As of June 30, 2018, we had $0.2 million of restricted cash included in long-term assets. These amounts included in restricted cash primarily represent deposits to secure letters of credit for various supply contracts. These deposits are held in interest bearing accounts.

On December 19, 2014, we amended our Loan and Security Agreement (the "Term Loan") with Hercules and entered into a new term loan (the “Term Loan C”), borrowing $1.5 million (our prior $10.0 million term loan with Hercules was repaid in full at maturity on November 1, 2016).  After closing fees and expenses, the net proceeds from the Term Loan C were $1.4 million.  We made interest only payments on the Term Loan C until maturity on June 1, 2017, when the loan was repaid in its entirety.

On May 5, 2017, we entered into an underwriting agreement relating to the issuance and sale (the "Offering") of up to 4.0 million shares of our common stock at a public offering price of $4.00 per share and granted a 30-day option (the "Option") to the underwriters to purchase up to an additional 600,000 shares of common stock at the public offering price. The net proceeds to us from the Offering were approximately $14.7 million, after deducting underwriting discounts and commissions and offering expenses payable by us. On May 24, 2017, the underwriters notified us that they had exercised in full their Option to purchase an additional 600,000 shares of common stock in connection with the Offering. The net proceeds to us from the Option were approximately $2.3 million, after deducting underwriting discounts and commissions and offering expenses payable by us. The total net proceeds to us during the three months ended June 30, 2017 from the Offering and Option were approximately $17.0 million, after deducting underwriting discounts and commissions and offering expenses payable by us. The Company terminated its At Market Issuance Sales Agreement with FBR Capital Markets & Co in conjunction with the Offering. In addition, in December 2015, we entered into a set of strategic agreements valued at approximately $210.0 million with Inox.

We believe we have sufficient available liquidity to fund our operations and capital expenditures for the next twelve months. In addition, we may seek to raise additional capital, which could be in the form of loans, convertible debt or equity, to fund our operating requirements and capital expenditures. Our liquidity is highly dependent on our ability to increase revenues, including our ability to collect revenues under our agreements with Inox, control our operating costs, and our ability to raise additional capital, if necessary. There can be no assurance that we will be able to raise additional capital, on favorable terms or at all, or execute on any other means of improving our liquidity as described above.

Legal Proceedings

We are involved in legal and administrative proceedings and claims of various types. See Part II, Item 1, “Legal Proceedings,” for additional information. We record a liability in our consolidated financial statements for these matters when a loss is known or considered probable and the amount can be reasonably estimated. We review these estimates each accounting period as additional information is known and adjust the loss provision when appropriate. If a matter is both probable to result in liability and the amounts of loss can be reasonably estimated, we estimate and disclose the possible loss or range of loss to the extent necessary to make the consolidated financial statements not misleading. If the loss is not probable or cannot be reasonably estimated, a liability is not recorded in our consolidated financial statements.

Off-Balance Sheet Arrangements

We do not have any off-balance sheet arrangements, as defined under SEC rules, such as relationships with unconsolidated entities or financial partnerships, which are often referred to as structured finance or special purpose entities, established for the purpose of facilitating transactions that are not required to be reflected on our balance sheet except as discussed below.

We occasionally enter into construction contracts that include a performance bond. As these contracts progress, we continually assess the probability of a payout from the performance bond. Should we determine that such a payout is probable, we would record a liability.

30

In addition, we have various contractual arrangements in which minimum quantities of goods or services have been committed to be purchased on an annual basis.

Recent Accounting Pronouncements

In May 2014, the Financial Accounting Standards Board (“FASB”) and the International Accounting Standards Board (IASB) issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606). The guidance substantially converges final standards on revenue recognition between the FASB and IASB providing a framework on addressing revenue recognition issues and, upon its effective date, replaces almost all existing revenue recognition guidance, including industry-specific guidance, in current U.S. generally accepted accounting principles. The FASB has subsequently issued the following multiple amendments to ASU 2014-09 which are all effective for annual reporting periods beginning after December 15, 2017.

As of April 1, 2018, we have adopted ASU 2014-09 and its amendments, reported the impact in our consolidated financial statements, and have implemented changes to our business processes, systems and controls to support revenue recognition and the related disclosures under this ASU. Our assessment included a detailed review of representative contracts from each of our revenue streams and a comparison of our historical accounting policies and practices to the new standard. We adopted the new standards retrospectively with the cumulative effect of initially applying the guidance recognized at the date of initial application (the modified retrospective transition method) to all existing contracts that have remaining obligations as of April 1, 2018. Accordingly, we have elected to retroactively adjust only those contracts that do not meet the definition of a complete contract at the date of the initial application. This guidance will lead to recognizing certain revenue transactions sooner than in the past on certain contracts, as we will need to estimate the revenue we will be entitled to upon contract completion, and later on other contracts, such as Consulting and Statement of Work transactions, due to the lack of an enforceable right to payment for performance obligations satisfied over time. There are no changes in the accounting for our largest revenue stream which includes Inox Wind Ltd as our primary customer. Across other revenue streams such as DVAR Equipment and DVAR Turnkey, the timing of revenue recognition will be affected for multiple types of contracts, primarily multiple performance obligation contracts in our Grid business unit, but those differences did not have a material impact on our consolidated financial statements. The adjustment to opening retained earnings was not significant for the period commencing on April 1, 2018. Additionally, the adoption of this new standard is not expected to have any tax impact on the consolidated financial statements. As part of this analysis, we evaluated our information technology capabilities and systems, and did not incur significant information technology costs to modify systems currently in place.

In January 2016, the FASB issued ASU 2016-01, Financial Instruments-Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities.  The amendments in ASU 2016-01 enhance the reporting model for financial instruments to provide users of financial statements with more decision-useful information. This ASU is effective for annual reporting periods beginning after December 15, 2017, and interim periods within those fiscal years.  We adopted ASU 2016-01 effective April 1, 2018 and noted no significant impact to our consolidated financial statements.

In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842). The guidance in this ASU supersedes the leasing guidance in Topic 840, Leases. Under the new guidance, lessees are required to recognize lease assets and lease liabilities on the balance sheet for all leases with terms longer than 12 months. Leases will be classified as either finance or operating, with classification affecting the pattern of expense recognition in the income statement.

• In July 2018, the FASB issued ASU 2018-10, Codification improvements to Topic 842, Leases. The amendments in ASU 2018-10 provide more clarification in regards to the application and requirements of ASU 2016-02.

This ASU and its amendments are effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. A modified retrospective transition approach is required for lessees for capital and operating leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements, with certain practical expedients available. We are currently evaluating the effects adoption of this guidance will have on our consolidated financial statements.

In June 2016, the FASB issued ASU 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. The amendments in ASU 2016-13 provide more decision-useful information about the expected credit losses on financial instruments and other commitments to extend credit held by a reporting entity at each reporting date. The ASU is effective for annual reporting periods beginning after December 15, 2019, including interim periods within that year.  We are currently evaluating the impact, if any, the adoption of ASU 2016-13 may have on our consolidated financial statements.

In 2016, the FASB issued the following two ASU's on Statement of Cash Flows (Topic 230). Both amendments are effective for annual reporting periods beginning after December 15, 2017, including interim periods within that year.

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• In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments. The amendments in ASU 2016-15 provide more guidance towards the classification of multiple different types of cash flows in order to reduce the diversity in reporting across entities.

• In November 2016, the FASB issued ASU 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash. The amendments in ASU 2016-18 explain the change during the period in the total of cash, cash equivalents, and amounts generally described as restricted cash or restricted cash equivalents. Therefore, amounts generally described as restricted cash and restricted cash equivalents should be included with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the statement of cash flows.

We adopted ASU 2016-15 and ASU 2016-18 effective April 1, 2018 and noted no significant impact to our consolidated financial statements.

In October 2016, the FASB issued ASU 2016-16, Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory. The amendments in ASU 2016-16 improve the accounting for the income tax consequences of intra-entity transfers of assets other than inventory. The ASU is effective for annual reporting periods beginning after December 15, 2017, including interim periods within that year.  We adopted of ASU 2016-16 effective April 1, 2018 and noted no significant impact to our consolidated financial statements.

In January 2017, the FASB issued ASU 2017-03, Accounting Changes and Error Corrections (Topic 250) and Investments - Equity Method and Joint Ventures. The amendments in ASU 2017-03 provide additional detail surrounding disclosures required related to adoption of new pronouncements. The ASU is effective for the periods of each related pronouncement.  We are currently evaluating the impact the adoption of ASU 2017-03 may have on our consolidated financial statements.

In February 2017, the FASB issued ASU 2017-05, Other Income - Gains and Losses from the Derecognition of Non-financial Assets (Subtopic 610-20). The amendments in ASU 2017-05 clarify the scope of Subtopic 610-20, Other Income-Gains and Losses from the Derecognition of Non-financial Assets, and to add guidance for partial sales of non-financial assets. Subtopic 610-20, which was issued in May 2014 as a part of ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606), provides guidance for recognizing gains and losses from the transfer of non-financial assets in contracts with non-customers.  We adopted ASU 2017-05 effective April 1, 2018 and adjusted the opening balance of accumulated deficit for $0.1 million for recognition of the deferred gain on the sale of the 64 Jackson Road building that occurred on March 28, 2018.

In May 2017, the FASB issued ASU 2017-09, Compensation - Stock Compensation (Subtopic 718) Scope of Modification Accounting. The amendments in ASU 2017-09 provide clarity and reduce both (1) diversity in practice and (2) cost and complexity when applying the guidance in Topic 718, Compensation—Stock Compensation, to a change to the terms or conditions of a share-based payment award.  The ASU is effective for annual reporting periods beginning after December 15, 2017, including interim periods within those periods. We adopted ASU 2017-09 effective April 1, 2018 and noted no significant impact to our consolidated financial statements.

In July 2017, the FASB issued ASU 2017-11, Earnings per Share (Topic 260), Distinguishing Liabilities from Equity (Topic 480), and Derivatives and Hedging (Topic 815). The amendments in ASU 2017-11 provide guidance for freestanding equity-linked financial instruments, such as warrants and conversion options in convertible debt or preferred stock, and should no longer be accounted for as a derivative liability at fair value as a result of the existence of a down round feature. The ASU is effective for annual reporting periods beginning after December 15, 2018, including interim periods within those periods. We are currently evaluating the impact the adoption of ASU 2017-11 may have on our consolidated financial statements.

In August 2017, the FASB issued ASU 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities. The amendments in ASU 2017-12 provide improved financial reporting of hedging relationships to better portray the economic results of an entity’s risk management activities in its financial statements. In addition, the amendments in this update make certain targeted improvements to simplify the application of the hedge accounting guidance. The ASU is effective for annual reporting periods beginning after December 15, 2018, including interim periods within those periods. We are currently evaluating the impact the adoption of ASU 2017-12 may have on our consolidated financial statements.

In June 2018, the FASB issued ASU 2018-07, Compensation - Stock Compensation (Topic 718): Improvements to Non-Employee Share Based Payment Accounting. The amendments in ASU 2018-07 provide for the simplification of the measurement of share-based payment transactions for acquiring goods and services from non-employees. The ASU is effective for annual reporting periods beginning after December 15, 2018, including interim periods within those periods. We are currently evaluating the impact the adoption of ASU 2018-07 may have on our consolidated financial statements.

32

We do not believe that, outside of those disclosed here, there are any other recently issued accounting pronouncements that will have a material impact on our consolidated financial statements.

33

ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

We face exposure to financial market risks such as adverse movements in foreign currency exchange rates. These exposures may change over time as our business practices evolve and could have a material adverse impact on our financial results. Our market risk profile as of June 30, 2018 has not materially changed since March 31, 2018. Our market risk profile as of March 31, 2018 is disclosed in our Annual Report on Form 10-K for the fiscal year ended March 31, 2018, filed with the SEC on June 6, 2018.

ITEM 4. CONTROLS AND PROCEDURES

Evaluation of Disclosure Controls and Procedures

Our management, with the participation of our Chief Executive Officer and Chief Financial Officer, evaluated the effectiveness of our disclosure controls and procedures as of June 30, 2018. The term “disclosure controls and procedures,” as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act, means controls and other procedures of a company that are designed to ensure that information required to be disclosed by a company in the reports that it files or submits under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms. Disclosure controls and procedures include, without limitation, controls and procedures designed to ensure that information required to be disclosed by a company in the reports that it files or submits under the Exchange Act is accumulated and communicated to the Company’s management, including its principal executive and principal financial officers, as appropriate to allow timely decisions regarding required disclosure. Management recognizes that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving their objectives and management necessarily applies its judgment in evaluating the cost-benefit relationship of possible controls and procedures. Based on that evaluation of our disclosure controls and procedures as of June 30, 2018, our Chief Executive Officer and Chief Financial Officer concluded that, as of such date, our disclosure controls and procedures were effective at the reasonable assurance level.

Changes in Internal Control over Financial Reporting

We implemented internal controls to ensure that we adequately evaluated our contracts and accurately account for revenue recognition under ASU 2014-09, Revenue from Contracts with Customers, as amended. Apart from the foregoing, there were no other changes to our internal control over financial reporting during the quarter ended June 30, 2018, that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

PART II—OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS

On September 13, 2011, we commenced a series of legal actions in China against Sinovel. Our Chinese subsidiary, Suzhou AMSC Superconductor Co. Ltd., filed a claim for arbitration with the Beijing Arbitration Commission in accordance with the terms of our supply contracts with Sinovel. The case is captioned (2011) Jing Zhong An Zi No. 0693.

On October 8, 2011, Sinovel filed with the Beijing Arbitration Commission an application under the caption (2011) Jing Zhong An Zi No. 0693, for a counterclaim against us for breach of the same contracts under which we filed our original arbitration claim.

We also submitted a civil action application to the Beijing No. 1 Intermediate People’s Court under the caption (2011) Yi Zhong Min Chu Zi No. 15524, against Sinovel for software copyright infringement on September 13, 2011. In addition, we submitted a civil action application to the Beijing Higher People’s Court against Sinovel and certain of its employees for trade secret infringement on September 13, 2011 under the caption (2011) Gao Min Chu Zi No. 4193.

In connection with the Settlement Agreement described in Note 16 “Commitment and Contingencies,” on July 5, 2018, we and Sinovel submitted withdrawal applications to terminate the foregoing Proceedings to the relevant Chinese courts and the Beijing Arbitration Commission. Subject to our and Sinovel’s compliance with the terms of the Settlement Agreement, we and Sinovel have agreed not to re-institute any of the Proceedings.

On September 16, 2011, we filed a civil copyright infringement complaint in the Hainan Province No. 1 Intermediate People’s Court against Dalian Guotong Electric Co. Ltd. (“Guotong”), a supplier of power converter products to Sinovel, and Huaneng Hainan Power, Inc., a wind farm operator that has purchased Sinovel wind turbines containing Guotong power converter products. The case is captioned (2011) Hainan Yi Zhong Min Chu Zi No. 62. On August 17, 2016, we received notification from

34

the Hainan Higher People’s Court that it dismissed the case for what it cited was a lack of evidence. Due to the Settlement Agreement with Sinovel, we no longer intend to appeal this decision.

ITEM 1A. RISK FACTORS

Except as noted below there have been no material changes in the three months ended June 30, 2018 to the risk factors described in Part I, Item IA of our Annual Report on Form 10-K for the fiscal year ended March 31, 2018, filed with the SEC on June 6, 2018.

We face risks relating to our settlement with Sinovel.

On July 3, 2018, we and our wholly-owned subsidiaries AMSC China and AMSC Austria entered into a Settlement Agreement with Sinovel. The Settlement Agreement settles the litigation and arbitration proceedings between us and Sinovel, as further described elsewhere in this Quarterly Report. Under the terms of the Settlement Agreement, Sinovel has agreed to pay AMSC China an aggregate cash amount in Renminbi (RMB) equivalent to $57.5 million, consisting of two installments. Sinovel paid the first installment equivalent of $32.5 million on July 4, 2018, and has agreed to pay the second installment equivalent of $25.0 million by May 6, 2019, which payment has been guaranteed by Mr. Wenyuan Wei, former Sinovel chairman and a current Sinovel shareholder. Sinovel or Mr. Wei may fail to make this second payment by May 6, 2019, or at all. If we do not receive the second installment payment from either Sinovel or Mr. Wei in a timely manner or at all, our business, financial condition and results of operations could be materially adversely affected. In addition, there is no assurance that the relevant taxing authorities will agree with our assessment of the taxes that will be required in relation to foregoing payments.

In addition, if Sinovel and Mr. Wei fail to adhere to the terms of the Settlement Agreement, we may re-file our claims against Sinovel in the Chinese courts and/or with the Beijing Arbitration Commission. The Chinese courts and/or the Beijing Arbitration Commission may not accept any re-filing by us. If we are unable to re-file one or more proceedings, we may be unable to pursue our former claims against Sinovel and unable to recover damages for such claims, which could have a material adverse effect on our business, financial condition and results of operations.

ITEM 2. UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS

None

ITEM 3. DEFAULTS UPON SENIOR SECURITIES

None

ITEM 4. MINE SAFETY DISCLOSURES

Not Applicable

ITEM 5. OTHER INFORMATION

None

ITEM 6. EXHIBITS

35

EXHIBIT INDEX

		Incorporated by Reference
Exhibit Number	Exhibit Description		Form	File No.	Exhibit	Filing Date	Filed/Furnished Herewith
10.1	Fiscal 2018 Executive Incentive Plan.		8-K	000-19672	10.1	7/3/18
10.2	Settlement Agreement, entered into by the Company on July 3, 2018.		8-K	000-19672	10.1	7/9/18
10.3	Letter of Guarantee, dated July 3, 2018		8-K	000-19672	10.2	7/9/18
31.1	Chief Executive Officer—Certification pursuant to Rule 13a-14(a) or Rule 15d-14(a) of the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.						*
31.2	Chief Financial Officer—Certification pursuant to Rule 13a-14(a) or Rule 15d-14(a) of the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.						*
32.1	Chief Executive Officer—Certification pursuant to Rule13a-14(b) or Rule 15d-14(b) of the Securities Exchange Act of 1934 and 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.						**
32.2	Chief Financial Officer—Certification pursuant to Rule 13a-14(b) or Rule 15d-14(b) of the Securities Exchange Act of 1934 and 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.						**
101.INS	XBRL Instance Document.***
101.SCH	XBRL Taxonomy Extension Schema Document. ***
101.CAL	XBRL Taxonomy Calculation Linkbase Document. ***
101.DEF	XBRL Definition Linkbase Document. ***
101.LAB	XBRL Taxonomy Label Linkbase Document. ***
101.PRE	XBRL Taxonomy Presentation Linkbase Document. ***

_________________________

* Filed herewith

** Furnished herewith

*** Submitted electronically herewith

Attached as Exhibits 101 to this report are the following formatted in XBRL (Extensible Business Reporting Language): (i) Condensed Consolidated Balance Sheet as of June 30, 2018 and March 31, 2018 (ii) Condensed Statements of Operations and Income for the three months ended June 30, 2018 and 2017, (iii) Condensed Consolidated Statements of Comprehensive (Loss) Income for the three months ended June 30, 2018 and 2017, (iv) Condensed Consolidated Statements of Cash Flows for the three months ended June 30, 2018 and 2017, and (v) Notes to Condensed Consolidated Financial Statements.

36

SIGNATURE

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

		AMERICAN SUPERCONDUCTOR CORPORATION
Date:	July 31, 2018	By:	/s/ John W. Kosiba, Jr.
			John W. Kosiba, Jr.
			Senior Vice President, Chief Financial Officer and Treasurer (Principal Financial and Accounting Officer)

37

EX-31.1

Exhibit 31.1

AMERICAN SUPERCONDUCTOR CORPORATION

CERTIFICATIONS

I, Daniel P. McGahn, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of American Superconductor Corporation;

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

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

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

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

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

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

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

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

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

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

Date:	July 31, 2018	By:	/s/Daniel P. McGahn
			Daniel P. McGahn
			Chief Executive Officer

EX-31.2

Exhibit 31.2

AMERICAN SUPERCONDUCTOR CORPORATION

CERTIFICATIONS

I, John W. Kosiba, Jr., certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of American Superconductor Corporation;

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

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

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

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

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

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

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

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

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

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

Date:	July 31, 2018	By:	/s/John W. Kosiba, Jr.
			John W. Kosiba, Jr.
			Chief Financial Officer

EX-32.1

Exhibit 32.1

AMERICAN SUPERCONDUCTOR CORPORATION

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report on Form 10-Q of American Superconductor Corporation (the “Company”) for the period ended June 30, 2018 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), the undersigned, Daniel P. McGahn, Chief Executive Officer of the Company, hereby certifies, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to my knowledge:

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

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

Date:	July 31, 2018	By:	/s/Daniel P. McGahn
			Daniel P. McGahn
			Chief Executive Officer

EX-32.2

Exhibit 32.2

AMERICAN SUPERCONDUCTOR CORPORATION

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report on Form 10-Q of American Superconductor Corporation (the “Company”) for the period ended June 30, 2018 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), the undersigned, John W. Kosiba, Jr., Chief Financial Officer of the Company, hereby certifies, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to my knowledge:

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

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

Date:	July 31, 2018	By:	/s/John W. Kosiba, Jr.
			John W. Kosiba, Jr.
			Chief Financial Officer

XML

Document and Entity Information - shares	3 Months Ended
	Jun. 30, 2018	Jul. 27, 2018
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q1
Entity Registrant Name	AMERICAN SUPERCONDUCTOR CORP /DE/
Trading Symbol	AMSC
Entity Central Index Key	0000880807
Current Fiscal Year End Date	--03-31
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		21,228,071

XML

Unaudited Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2018	Mar. 31, 2018
Current assets:
Cash and cash equivalents	$ 26,750	$ 34,084
Accounts receivable, net	11,532	7,365
Inventory	18,353	19,780
Note receivable, current portion	3,000	3,000
Prepaid expenses and other current assets	4,709	2,947
Total current assets	64,344	67,176
Property, plant and equipment, net	11,554	12,513
Intangibles, net	3,145	3,230
Note receivable, long term portion, net of discount of $280 as of June 30, 2018 and net of discount of $336 and deferred gain of $105 as of March 31, 2018	2,720	2,559
Goodwill	1,719	1,719
Restricted cash	165	165
Deferred tax assets	516	542
Other assets	283	271
Total assets	84,446	88,175
Current liabilities:
Accounts payable and accrued expenses	15,144	12,625
Derivative liabilities	1,681	1,217
Deferred revenue, current portion	11,433	13,483
Total current liabilities	28,258	27,325
Deferred revenue, long term portion	8,040	8,454
Deferred tax liabilities	110	110
Other liabilities	98	57
Total liabilities	36,506	35,946
Commitments and contingencies (Note 15)
Stockholders' equity:
Common stock	214	211
Additional paid-in capital	1,041,980	1,041,113
Treasury stock	(1,884)	(1,645)
Accumulated other comprehensive income	667	883
Accumulated deficit	(993,037)	(988,333)
Total stockholders' equity	47,940	52,229
Total liabilities and stockholders' equity	$ 84,446	$ 88,175

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Unaudited Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2018	Mar. 31, 2018
Statement of Financial Position [Abstract]
Note receivable discount	$ 280	$ 336
Deferred gain on sale	$ 0	$ 105

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Unaudited Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Income Statement [Abstract]
Revenues	$ 12,607	$ 8,923
Cost of revenues	8,714	13,409
Gross margin	3,893	(4,486)
Operating expenses:
Research and development	2,840	2,717
Selling, general and administrative	5,786	6,138
Amortization of acquisition-related intangibles	85	13
Restructuring	310	1,339
Total operating expenses	9,021	10,207
Operating loss	(5,128)	(14,693)
Change in fair value of warrants	(464)	925
Interest income (expense), net	201	(10)
Other income (expense), net	609	(1,374)
Loss before income tax (benefit) expense	(4,782)	(15,152)
Income tax (benefit) expense	(45)	100
Net loss	$ (4,737)	$ (15,252)
Net loss per common share
Basic (in dollars per share)	$ (0.23)	$ (0.91)
Diluted (in dollars per share)	$ (0.23)	$ (0.91)
Weighted average number of common shares outstanding
Basic (in shares)	20,167	16,778
Diluted (in shares)	20,167	16,778

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Unaudited Condensed Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Statement of Comprehensive Income [Abstract]
Net loss	$ (4,737)	$ (15,252)
Other comprehensive gain (loss), net of tax:
Foreign currency translation gain (loss)	(216)	820
Total other comprehensive gain (loss), net of tax	(216)	820
Comprehensive loss	$ (4,953)	$ (14,432)

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Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Cash flows from operating activities:
Net loss	$ (4,737)	$ (15,252)
Adjustments to reconcile net loss to net cash used in operations:
Depreciation and amortization	1,150	4,345
Stock-based compensation expense	785	754
Provision for excess and obsolete inventory	144	250
Change in fair value of warrants	464	(925)
Non-cash interest expense	(56)	19
Other non-cash items	(394)	718
Changes in operating asset and liability accounts:
Accounts receivable	(4,192)	319
Inventory	(459)	1,719
Prepaid expenses and other current assets	(332)	(273)
Accounts payable and accrued expenses	75	(404)
Deferred revenue	666	3,300
Net cash used in operating activities	(6,886)	(5,430)
Cash flows from investing activities:
Purchase of property, plant and equipment	(115)	(76)
Proceeds from the sale of property, plant and equipment	0	10
Change in other assets	(51)	(23)
Net cash used in investing activities	(166)	(89)
Cash flows from financing activities:
Employee taxes paid related to net settlement of equity awards	(238)	(274)
Repayment of debt	0	(1,575)
Proceeds from public equity offering, net	0	16,954
Net cash provided by/(used in) financing activities	(238)	15,105
Effect of exchange rate changes on cash	(44)	412
Net increase/(decrease) in cash, cash equivalents and restricted cash	(7,334)	9,998
Cash, cash equivalents and restricted cash at beginning of period	34,249	27,744
Cash, cash equivalents and restricted cash at end of period	26,915	37,742
Supplemental schedule of cash flow information:
Cash paid for income taxes, net of refunds	176	96
Issuance of common stock to settle liabilities	85	90
Cash paid for interest	$ 0	$ 42

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Nature of the Business and Operations and Liquidity

3 Months Ended

Jun. 30, 2018

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Nature of the Business and Operations and Liquidity

Nature of the Business and Operations and Liquidity

Nature of the Business and Operations

American Superconductor Corporation (“AMSC” or the “Company”) was founded on April 9, 1987. The Company is a leading provider of megawatt-scale solutions that lower the cost of wind power and enhance the performance of the power grid. In the wind power market, the Company enables manufacturers to field wind turbines through its advanced engineering, support services and power electronics products. In the power grid market, the Company enables electric utilities and renewable energy project developers to connect, transmit and distribute power through its transmission planning services and power electronics and superconductor-based products. The Company’s wind and power grid products and services provide exceptional reliability, security, efficiency and affordability to its customers.

These unaudited condensed consolidated financial statements of the Company have been prepared on a going concern basis in accordance with United States generally accepted accounting principles (“GAAP”) and the Securities and Exchange Commission’s (“SEC”) instructions to Form 10-Q. The going concern basis of presentation assumes that the Company will continue operations and will be able to realize its assets and discharge its liabilities and commitments in the normal course of business. Certain information and footnote disclosures normally included in the financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to those instructions. The year-end condensed balance sheet data was derived from audited financial statements but does not include all disclosures required by GAAP. The unaudited condensed consolidated financial statements, in the opinion of management, reflect all adjustments (consisting of normal recurring adjustments) necessary for a fair statement of the results for the interim periods ended June 30, 2018 and 2017 and the financial position at June 30, 2018; however, these results are not necessarily indicative of results which may be expected for the full year. The interim condensed consolidated financial statements, and notes thereto, should be read in conjunction with the audited consolidated financial statements for the year ended March 31, 2018, and notes thereto, included in the Company’s annual report on Form 10-K for the year ended March 31, 2018 filed with the Securities and Exchange Commission on June 6, 2018.

Liquidity

The Company has experienced recurring operating losses and as of June 30, 2018, the Company had an accumulated deficit of $993.0 million. In addition, the Company has experienced recurring negative operating cash flows.  At June 30, 2018, the Company had cash and cash equivalents of $26.8 million, with no outstanding debt other than ordinary trade payables. Cash used in operations for the three months ended June 30, 2018 was $6.9 million.

From April 1, 2011 through the date of this filing, the Company has reduced its global workforce substantially. As of June 30, 2018, the Company had a global workforce of 231 persons.  The Company plans to closely monitor its expenses and, if required, expects to further reduce operating costs and capital spending to enhance liquidity.

Over the last several years, the Company has entered into several debt and equity financing arrangements in order to raise capital.  Since April 1, 2012, the Company has generated aggregate cash flows from financing activities of $85.0 million.  Included in this amount are proceeds of approximately $17.0 million after deducting underwriting discounts and commissions and offering expenses payable by the Company, from the Company's equity offering completed on May 10, 2017, which includes the subsequent exercise by the underwriters of their option in full to purchase additional shares. The Company terminated its At Market Issuance Sales Agreement ("ATM") with FBR Capital Markets & Co. in conjunction with this equity offering. See Note 14 “Stockholders' Equity” for further discussion of these financing arrangements.

On July 3, 2018, the Company and its wholly-owned subsidiaries Suzhou AMSC Superconductor Co. Ltd. (“AMSC China”) and AMSC Austria GMBH (“AMSC Austria”) entered into a settlement agreement (the “Settlement Agreement”) with Sinovel Wind Group Co., Ltd. (“Sinovel”). The Settlement Agreement settles the litigation and arbitration proceedings between the Company and Sinovel, as further described in Note 15 “Commitments and Contingencies". Under the terms of the Settlement Agreement, Sinovel has agreed to pay AMSC China an aggregate cash amount in Renminbi (RMB) equivalent to $57.5 million, consisting of two installments. Sinovel paid the first installment of $32.5 million on July 4, 2018, and has agreed to pay the second installment of $25.0 million (the “Second Payment”) within ten (10) months after the U.S. District Court for the Western District of Wisconsin (the “District Court”) delivers the first sentence against Sinovel in the criminal case entitled United States v. Sinovel Wind Co., Ltd., Case Number 3:13-cr-00084-jdp. On July 6, 2018, the District Court delivered such sentence, and therefore the Second Payment is due by May 6, 2019 (the “Second Payment Due Date”). On July 24, 2018, AMSC China paid $30.7 million to AMSC Austria to settle outstanding inter-company balances.

On February 5, 2018, the Company entered into a Purchase and Sale Agreement (the “PSA”) with 64 Jackson, LLC (the “Purchaser”) and Stewart Title Guaranty Company (“Escrow Agent”), to effectuate the sale of certain real property located at 64 Jackson Road, Devens, Massachusetts, including the building that had served as the Company’s headquarters (collectively, the “Property”), in exchange for total consideration of $23.0 million, composed of (i) cash consideration of $17.0 million, and (ii) a $6.0 million subordinated secured commercial promissory note payable to the Company (the "Seller Note"). Subsequently, the Seller, the Purchaser and Jackson 64 MGI, LLC (“Assignee”) entered into an Assignment of Purchase and Sale Agreement (the “Assignment Agreement”), pursuant to which the Purchaser assigned all of its rights and interests in the PSA to the Assignee and the Assignee agreed to assume all of the Purchaser’s obligations and liabilities under the PSA. The transaction closed on March 28, 2018, at which time the Company received, from the Assignee, cash consideration, net of certain agreed upon closing costs, of $16.9 million, and the Seller Note at an interest rate of 1.96%. The Seller Note is secured by a subordinated second mortgage on the Property and a subordinated second assignment of leases and rents.

In December 2015, the Company entered into a set of strategic agreements valued at approximately $210.0 million with Inox Wind Ltd. (“Inox” or "Inox Wind"), which includes a multi-year supply contract pursuant to which the Company will supply electric control systems to Inox and a license agreement allowing Inox to manufacture a limited number of electrical control systems. After Inox purchases the specified number of electrical control systems required under the terms of the supply contract, Inox agreed that the Company will continue as Inox’s preferred supplier and Inox will be required to purchase from the Company a majority of its electric control systems requirements for an additional three-year period.

The Company believes that based on the information presented above and its quarterly management assessment, it has sufficient liquidity to fund its operations and capital expenditures for the next twelve months following the issuance of the financial statements for the three months ended June 30, 2018. The Company’s liquidity is highly dependent on its ability to increase revenues, including its ability to collect revenues under our agreements with Inox, its ability to control its operating costs, and its ability to raise additional capital, if necessary. There can be no assurance that the Company will be able to continue to raise additional capital, on favorable terms or at all, from other sources or execute on any other means of improving liquidity described above.

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Revenue Recognition

3 Months Ended

Jun. 30, 2018

Revenue from Contract with Customer [Abstract]

Revenue Recognition

Revenue Recognition

On April 1, 2018, the Company adopted ASC 606, Revenue from Contracts with Customers, and all the related amendments and applied it to all contracts that were not completed as of April 1, 2018 using the modified retrospective method. The Company recognized the cumulative effect of initially applying the new revenue standard as an adjustment of less than $0.1 million to the opening balance of accumulated deficit. Prior period amounts have not been restated and continue to be reported under the accounting standards in effect for those periods.

The adoption of this guidance will lead to recognizing certain revenue transactions sooner than in the past on certain contracts, as the Company will need to estimate the revenue it will be entitled to upon contract completion, and later on other contracts, such as Consulting and Statement of Work transactions, due to the lack of an enforceable right to payment for performance obligations satisfied over time, specifically in the technology product line. The Company does not expect a material impact to its consolidated statements of operations on an ongoing basis from the adoption of the new standard.

In addition, the FASB issued ASU 2017-05, Other Income - Gains and Losses from the Derecognition of Non-financial Assets (Subtopic 610-20), in February 2017, to amend ASC 610-20, Other Income - Gains and Losses from the Derecognition of Non-financial Assets, (issued at the same time as ASC 606), which provides a model for the measurement and recognition of gains and losses on the sale of nonfinancial assets, such as property and equipment, including real estate. As a result of adopting ASU 2017-05 on April 1, 2018, the Company recognized an adjustment to the opening balance of accumulated deficit for the deferred gain from the March 28, 2018, sale of the Company's former headquarters in Devens, Massachusetts in the amount of $0.1 million.

The cumulative effect to the Company’s consolidated April 1, 2018 balance sheet from the adoption of the new revenue standard and the sale of nonfinancial assets was as follows (in thousands):

	March 31, 2018			Opening Adjustment			April 1, 2018
Assets:
Inventory	$	19,780		$	(1,599	)	$	18,181
Prepaid expenses and other current assets	2,947			1,599			4,546
Notes receivable, long term portion	2,559			105			2,664
Liabilities and Stockholders' Equity:
Accounts payable and accrued expenses	$	(12,625	)	$	(2,729	)	$	(15,354	)
Deferred revenue	(13,483		)	2,657			(10,826		)
Accumulated deficit	$	(988,333	)	$	(33	)	$	(988,366	)

Included in the opening adjustment are reclassifications for deferred program costs and deferred revenue for previous balances related to agreements that no longer meet the definition of a customer contract under ASC 606. The impact of adoption on the Company’s opening balances and for the three months ended June 30, 2018, in all financial statement line items impacted by ASC 606 was immaterial from the amount that would have been reported under the previous guidance.

The Company’s revenues in its Grid segment are derived primarily through transmitting and distributing power, providing planning services that allow it to identify power grid needs and risks, and developing ship protection systems for the US Navy. The Company’s revenues in its Wind segment are derived primarily through supplying advanced power electronics and control systems, licensing our highly engineered wind turbine designs, and providing extensive customer support services to wind turbine manufacturers. The Company records revenue based on a five-step model in accordance with ASC 606. For its customer contracts, the Company identifies the performance obligations, determines the transaction price, allocates the contract transaction price to the performance obligations, and recognizes the revenue when (or as) control of goods or services is transferred to the customer. As of June 30, 2018, 82% of revenue was recognized at the point in time when control transferred to the customer, with the remainder being recognized over time.

In the Company's equipment and system product line each contract with a customer summarizes each product sold to a customer, which typically represent distinct performance obligations. A contracts' transaction price is allocated to each distinct performance obligation using the respective standalone selling price which is determined primarily using the cost plus expected margin approach and recognized as revenue when, or as, the performance obligation is satisfied. The majority of the Company’s product sales transfer control to the customer in line with the contracted delivery terms and revenue is recorded at the point in time when products are transferred to the freight forwarder, as the Company has determined that this is the point in time that control transfers to the customer.

In the Company's service and technology development product line, there are multiple different types of transactions but each of them begins with a contract with a customer that summarizes each product sold to a customer, which typically represents distinct performance obligations. The technology development transactions are primarily for activities that have no alternative use and for which a profit can be expected throughout the life of the contract. In these cases, the revenue is recognized over time, but in the instances where the profit cannot be assured throughout the entire contract then the revenue is recognized at a point in time. Each contract's transaction price is allocated to each distinct performance obligation using the respective standalone selling price which is determined primarily using the cost plus expected margin approach. The ongoing service transactions are for service contracts that provide benefit to the customer simultaneously as the Company performs its obligations, and therefore this revenue is recognized ratably over time throughout the effective period of these contracts. The transaction prices on these contracts are allocated based on an adjusted market approach which is re-assessed annually for reasonableness. The field service transactions include contracts for delivery of goods and completion of services made at the customer's requests, which are not deemed satisfied until the work has been completed and/or the requested goods have been delivered, so all of this revenue is recognized at the point in time when the control changes, and at allocated prices based on the adjusted market approach driven by standard price lists. The royalty transactions are related to certain contract terms on transactions in the Company's equipment and systems product line based on activity as specified in the contracts. The transaction prices of these agreements are calculated based on an adjusted market approach as specified in the contract. The Company reports royalty revenue for usage-based royalties when the sales have occurred. In circumstances when collectability is not assured and a contract does not exist under ASC 606, revenue is deferred until a non-refundable payment has been received for substantially all the amount that is due and there are no further remaining performance obligations.

The Company's service contracts can include a purchase order from a customer for specific goods in which each item is a distinct performance obligation satisfied at a point in time at which control of the goods is transferred to the customer which occurs based on the contracted delivery terms or when the requested service work has been completed. The transaction price for these goods is allocated based on the adjusted market approach considering similar transactions under similar circumstances. Service contracts are also derived from ongoing maintenance contracts and extended service-type warranty contracts. In these transactions, the Company is contracted to provide an ongoing service over a specified period of time. As the customer is consuming the benefits as the service is being provided the revenue is recognized over time ratably.

The Company’s policy is to not accept volume discounts, product returns, or rebates and allowances within its contracts. In the event a contract was approved with any of these terms, it would be evaluated for variable consideration, estimated and recorded as a reduction of revenue in the same period the related product revenue was recorded.

The Company provides assurance-type warranties on all product sales for a term of typically one to two years, and extended service-type warranties at the customers’ option for an additional term ranging up to four additional years. The Company accrues for the estimated warranty costs for assurance warranties at the time of sale based on historical warranty experience plus any known or expected changes in warranty exposure. For all extended service-type warranties, the Company recognizes the revenue ratably over time during the effective period of the services.

The Company records revenue net of sales tax, value added tax, excise tax and other taxes collected concurrent with revenue-producing activities. The Company has elected to recognize the cost for freight and shipping when control over the products sold passes to customers and revenue is recognized. The Company has elected to recognize incremental costs of obtaining a contract as expense when incurred except in contracts where the amortization period would exceed twelve months; in such cases the long term amount will be assessed for materiality. The Company has elected to not adjust the promised amount of consideration for the effects of a significant financing component if the period of financing is twelve months or less.

The Company’s contracts with customers do not typically include extended payment terms and may include milestone billing over the life of the contract. Payment terms vary by contract type and type of customer and generally range from 30 to 60 days from delivery.

The following tables disaggregate the Company’s revenue by product line and by shipment destination:

	Three months ended June 30, 2018
Product Line:	Grid		Wind
Equipment and systems	$	7,462	$	3,492
Services and technology development	1,467		186
Total	$	8,929	$	3,678
Region:
Americas	$	7,496	$	23
Asia Pacific	808		3,595
EMEA	625		60
Total	$	8,929	$	3,678

As of June 30, 2018 and March 31, 2018, the Company’s contract assets and liabilities primarily relate to the timing differences between cash received from a customer in connection with contractual rights to invoicing and the timing of revenue recognition following completion of performance obligations. The Company's accounts receivable balance is made up entirely of customer contract related balances. Changes in the Company’s contract assets, which are included in “Unbilled AR” and "Deferred program costs" (see Note 7, “Accounts Receivable” and Note 8, "Inventory" for a reconciliation to the condensed consolidated balance sheet) and contract liabilities, which are included in the current portion and long term portion of “deferred revenue” in the Company’s condensed consolidated balance sheets, are as follows:

	Unbilled AR			Deferred Program Costs			Contract Liabilities
Beginning balance as of March 31, 2018	$	3,016		$	2,567		$	21,937
Impact of adoption of ASC 606	—			(1,599		)	(2,657		)
Increases for costs incurred to fulfill performance obligations	—			1,132			—
Increase (decrease) due to customer billings	(3,221		)	—			4,281
Decrease due to cost recognition on completed performance obligations	—			(48		)	—
Increase (decrease) due to recognition of revenue based on transfer of control of performance obligations	4,824			(9		)	(3,324		)
Other changes and FX impact	(16		)	34			(764		)
Ending balance as of June 30, 2018	$	4,603		$	2,077		$	19,473

The Company’s remaining performance obligations represent the unrecognized revenue value of the Company’s contractual commitments. The Company’s performance obligations may vary significantly each reporting period based on the timing of major new contractual commitments. As of June 30, 2018, the Company had outstanding performance obligations on existing contracts under ASC 606 to be recognized in the next twelve months of approximately $50.6 million. There is also approximately $8.1 million of outstanding performance obligations to be recognized over a period of thirteen to sixty months. The remaining performance obligations are subject to customer actions and therefore the timing of revenue recognition cannot be reasonably estimated. The twelve month performance obligations include anticipated shipments to Inox based on the twelve month rolling forecast provided by Inox on the multi-year supply contract. The quantities specified in any forecast provided by Inox related to the multi-year supply contract are firm and irrevocable for the first three months of a twelve month rolling forecast. The timing of the performance obligations beyond the Inox twelve month provided forecast are not determinable and therefore are not included in the total remaining performance obligations.

The following table sets forth customers who represented 10% or more of the Company’s total revenues for the three months ended June 30, 2018 and 2017:

	Reportable Segment	June 30, 2018		June 30, 2017
Inox Wind Limited	Wind	25	%	22	%
Vestas	Grid	36	%	—	%
U.S. Navy	Grid	<10%		35	%

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Stock-Based Compensation

3 Months Ended

Jun. 30, 2018

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

Stock-Based Compensation

Stock-Based Compensation

The Company accounts for its stock-based compensation at fair value. The following table summarizes stock-based compensation expense by financial statement line item for the three months ended June 30, 2018 and 2017 (in thousands):

	Three months ended June 30,
	2018		2017
Cost of revenues	$	40	$	36
Research and development	51		49
Selling, general and administrative	694		669
Total	$	785	$	754

The Company issued 34,480 shares of immediately vested common stock and 276,000 shares of restricted stock awards during the three months ended June 30, 2018, and issued 33,487 shares of immediately vested common stock during the three months ended June 30, 2017.  These restricted stock awards generally vest over 2-3 years.  Awards for restricted stock include both time-based and performance-based awards.  For options and awards that vest upon the passage of time, expense is being recorded over the vesting period.  Performance-based awards are expensed over the requisite service period based on probability of achievement. In addition, the Company issued 16,667 restricted stock units under the 2007 Stock Incentive Plan during the three months ended June 30, 2017, each of which represents the right to receive one share of common stock in connection with a severance agreement entered into with one of the Company's former executive officers. These restricted stock units vested and were settled in shares of common stock on the eighth day after receipt of an irrevocable release.

The estimated fair value of the Company’s stock-based awards, less expected annual forfeitures, is amortized over the awards’ service period. The total unrecognized compensation cost for unvested outstanding stock options was $0.2 million at June 30, 2018. This expense will be recognized over a weighted average expense period of approximately 0.7 years. The total unrecognized compensation cost for unvested outstanding restricted stock was $3.5 million at June 30, 2018. This expense will be recognized over a weighted-average expense period of approximately 2.1 years.

The Company did not grant any stock options during the three months ended June 30, 2018 or 2017.

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Computation of Net Loss per Common Share

3 Months Ended

Jun. 30, 2018

Earnings Per Share [Abstract]

Computation of Net Loss per Common Share

Computation of Net Loss per Common Share

Basic net loss per share (“EPS”) is computed by dividing net loss by the weighted-average number of common shares outstanding for the period. Where applicable, diluted EPS is computed by dividing the net loss by the weighted-average number of common shares and dilutive common equivalent shares outstanding during the period, calculated using the treasury stock method. Common equivalent shares include the effect of restricted stock, exercise of stock options and warrants and contingently issuable shares. For the three months ended June 30, 2018, 1.1 million shares were not included in the calculation of diluted EPS as they were considered anti-dilutive, of which 0.2 million relate to outstanding stock options, and 0.9 million relate to outstanding warrants. For the three months ended June 30, 2017, 1.5 million shares were not included in the calculation of diluted EPS as they were considered anti-dilutive, of which 0.3 million relate to outstanding stock options, and 1.2 million relate to outstanding warrants.

The following table reconciles the numerators and denominators of the earnings per share calculation for the three months ended June 30, 2018 and 2017 (in thousands, except per share data):

	Three months ended June 30,
	2018			2017
Numerator:
Net loss	$	(4,737	)	$	(15,252	)
Denominator:
Weighted-average shares of common stock outstanding	20,999			17,089
Weighted-average shares subject to repurchase	(832		)	(311		)
Shares used in per-share calculation ― basic	20,167			16,778
Shares used in per-share calculation ― diluted	20,167			16,778
Net loss per share ― basic	$	(0.23	)	$	(0.91	)
Net loss per share ― diluted	$	(0.23	)	$	(0.91	)

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Acquisition and Related Goodwill

3 Months Ended

Jun. 30, 2018

Business Combinations [Abstract]

Acquisition and Related Goodwill

Acquisition and Related Goodwill

Acquisition of Infinia Technology Corporation

On September 25, 2017, the Company acquired Infinia Technology Corporation ("ITC") for approximately $3.8 million (the "Acquisition"). Located in Richmond, Washington, ITC is a technology firm founded in 2009 specializing in the design, development and commercialization of cryo-coolers for a wide range of applications. This technology supports the Company's efforts with the U.S. Navy and Ship Protection Systems (“SPS”) products.

The results of ITC's operations, which were not significant from the date of acquisition until June 30, 2018, are included in the Company’s consolidated results from the date of Acquisition of September 25, 2017, through the three months ended June 30, 2018. Assuming the Acquisition had occurred on April 1, 2017 and 2016, the impact on the consolidated results of the Company would not have been significant.

Goodwill

At the time of the Acquisition, the Company allocated the purchase price to the assets acquired and liabilities assumed at their estimated fair values as of the date of Acquisition. The excess of the purchase price paid by the Company over the estimated fair value of net assets acquired of $1.7 million has been recorded as goodwill in the Company's Grid segment. Goodwill represents the value associated with the acquired workforce and synergies related to the merger of the two companies.

The Company did not identify any triggering events in the three months ended June 30, 2018, that would require interim impairment testing of goodwill.

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Fair Value Measurements

3 Months Ended

Jun. 30, 2018

Fair Value Disclosures [Abstract]

Fair Value Measurements

Fair Value Measurements

A valuation hierarchy for disclosure of the inputs to valuation used to measure fair value has been established. This hierarchy prioritizes the inputs into three broad levels as follows:

Level 1	-	Inputs are unadjusted quoted prices in active markets for identical assets or liabilities that the Company has the ability to access at the measurement date.
Level 2	-	Inputs include quoted prices for similar assets and liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability, and inputs that are derived principally from or corroborated by observable market data by correlation or other means (market corroborated inputs).
Level 3	-	Unobservable inputs that reflect the Company’s assumptions that market participants would use in pricing the asset or liability. The Company develops these inputs based on the best information available, including its own data.

The Company provides a gross presentation of activity within Level 3 measurement roll-forward and details of transfers in and out of Level 1 and 2 measurements.  A change in the hierarchy of an investment from its current level is reflected in the period during which the pricing methodology of such investment changes.  Disclosure of the transfer of securities from Level 1 to Level 2 or Level 3 is made in the event that the related security is significant to total cash and investments.  The Company did not have any transfers of assets and liabilities from Level 1, Level 2 or Level 3 of the fair value measurement hierarchy during the three months ended June 30, 2018.

A financial asset’s or liability’s classification within the hierarchy is determined based on the lowest level input that is significant to the fair value measurement.

The following table provides the assets and liabilities carried at fair value on a recurring basis, measured as of June 30, 2018 and March 31, 2018 (in thousands):

	Total Carrying Value		Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
June 30, 2018:
Assets:
Cash equivalents	$	24,704	$	24,704	$	—	$	—
Derivative liabilities:
Warrants	1,681		—		—		1,681

	Total Carrying Value		Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
March 31, 2018:
Assets:
Cash equivalents	$	32,589	$	32,589	$	—	$	—
Derivative liabilities:
Warrants	$	1,217	$	—	$	—	$	1,217

The table below reflects the activity for the Company’s major classes of liabilities measured at fair value on a recurring basis (in thousands):

	Warrants
April 1, 2018	$	1,217
Mark to market adjustment	464
Balance at June 30, 2018	$	1,681

	Warrants
April 1, 2017	$	1,923
Mark to market adjustment	(925		)
Balance at June 30, 2017	$	998

Valuation Techniques

Cash Equivalents

Cash equivalents consist of highly liquid instruments with maturities of three months or less that are regarded as high quality, low risk investments and are measured using such inputs as quoted prices, and are classified within Level 1 of the valuation hierarchy. Cash equivalents consist principally of certificates of deposits and money market accounts.

Warrants

Warrants were issued in conjunction with a Securities Purchase Agreement (the “Purchase Agreement”) with Capital Ventures International (“CVI”), an equity offering to Hudson Bay Capital in November 2014, and a Loan and Security Agreement with Hercules Technology Growth Capital, Inc. (“Hercules”). These warrants issued to CVI expired on October 4, 2017. See Note 13 “Warrants and Derivative Liabilities,” for additional information. Outstanding warrants are subject to revaluation at each balance sheet date, and any change in fair value will be recorded as a change in fair value in derivatives and warrants until the earlier of their exercise or expiration.

The Company relies on various assumptions in a lattice model to determine the fair value of warrants. The Company has valued the warrants within Level 3 of the valuation hierarchy. See Note 13, “Warrants and Derivative Liabilities,” for a discussion of the warrants and the valuation assumptions used.

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Accounts Receivable

3 Months Ended

Jun. 30, 2018

Receivables [Abstract]

Accounts Receivable

Accounts Receivable

Accounts receivable at June 30, 2018 and March 31, 2018 consisted of the following (in thousands):

	June 30, 2018			March 31, 2018
Accounts receivable (billed)	$	6,983		$	4,403
Accounts receivable (unbilled)	4,603			3,016
Less: Allowance for doubtful accounts	(54		)	(54		)
Accounts receivable, net	$	11,532		$	7,365

Note Receivable

The Company entered into a purchase and sale agreement dated February 1, 2018, for the sale of the Devens facility (including land, building and building improvements) located at 64 Jackson Road, Devens, Massachusetts to 64 Jackson Road, LLC, a limited liability company, in the amount of $23.0 million. The terms for payment included a $1.0 million security deposit, and a note receivable for $6.0 million payable to the Company with the remaining cash net of certain adjustments for closing costs at the date of settlement. The note receivable is due in two$3.0 million installments plus accrued interest at a rate of 1.96% on March 31, 2019 and March 31, 2020. The note is subordinate to East Boston Savings Bank's mortgage on the Devens property.

The note receivable was discounted to its present value of $5.7 million utilizing a discount rate of 6%, which was based on management’s assessment of what an appropriate loan at current market rates would be. The $0.3 million discount was recorded as an offset to the long term portion of the note receivable, and is being amortized to interest income over the term of the note. In addition, the resulting gain of $0.1 million from the sale of the Devens property which was deferred previously was recorded as a component of the cumulative effect of an accounting change upon the adoption of ASU 2017-05 which was issued as a part of ASU 2014-09. This gain was recorded as an offset to the opening accumulated deficit.

Note receivable as of June 30, 2018 and March 31, 2018 consisted of the following (in thousands):

Current assets	June 30, 2018			March 31, 2018
Note receivable, current	$	3,000		$	3,000
Total current note receivable	$	3,000		$	3,000
Long term assets
Note receivable, long term	$	3,000		$	3,000
Note receivable discount	(280		)	(336		)
Deferred gain on sale	—			(105		)
Total long term note receivable	$	2,720		$	2,559

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Inventory

3 Months Ended

Jun. 30, 2018

Inventory Disclosure [Abstract]

Inventory

Inventory

Inventory, net of reserves, at June 30, 2018 and March 31, 2018 consisted of the following (in thousands):

	June 30, 2018		March 31, 2018
Raw materials	$	6,316	$	7,526
Work-in-process	1,327		920
Finished goods	8,633		8,767
Deferred program costs	2,077		2,567
Net inventory	$	18,353	$	19,780

The Company recorded inventory write-downs of $0.1 million and $0.3 million for the three months ended June 30, 2018 and 2017, respectively.  These write downs were based on evaluating its inventory on hand for excess quantities and obsolescence.

Deferred program costs as of June 30, 2018 and March 31, 2018 primarily represent costs incurred on programs where the Company needs to complete performance obligations before the related revenue and costs will be recognized.

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Note Receivable

3 Months Ended

Jun. 30, 2018

Receivables [Abstract]

Note Receivable

Accounts Receivable

Accounts receivable at June 30, 2018 and March 31, 2018 consisted of the following (in thousands):

	June 30, 2018			March 31, 2018
Accounts receivable (billed)	$	6,983		$	4,403
Accounts receivable (unbilled)	4,603			3,016
Less: Allowance for doubtful accounts	(54		)	(54		)
Accounts receivable, net	$	11,532		$	7,365

Note Receivable

The Company entered into a purchase and sale agreement dated February 1, 2018, for the sale of the Devens facility (including land, building and building improvements) located at 64 Jackson Road, Devens, Massachusetts to 64 Jackson Road, LLC, a limited liability company, in the amount of $23.0 million. The terms for payment included a $1.0 million security deposit, and a note receivable for $6.0 million payable to the Company with the remaining cash net of certain adjustments for closing costs at the date of settlement. The note receivable is due in two$3.0 million installments plus accrued interest at a rate of 1.96% on March 31, 2019 and March 31, 2020. The note is subordinate to East Boston Savings Bank's mortgage on the Devens property.

The note receivable was discounted to its present value of $5.7 million utilizing a discount rate of 6%, which was based on management’s assessment of what an appropriate loan at current market rates would be. The $0.3 million discount was recorded as an offset to the long term portion of the note receivable, and is being amortized to interest income over the term of the note. In addition, the resulting gain of $0.1 million from the sale of the Devens property which was deferred previously was recorded as a component of the cumulative effect of an accounting change upon the adoption of ASU 2017-05 which was issued as a part of ASU 2014-09. This gain was recorded as an offset to the opening accumulated deficit.

Note receivable as of June 30, 2018 and March 31, 2018 consisted of the following (in thousands):

Current assets	June 30, 2018			March 31, 2018
Note receivable, current	$	3,000		$	3,000
Total current note receivable	$	3,000		$	3,000
Long term assets
Note receivable, long term	$	3,000		$	3,000
Note receivable discount	(280		)	(336		)
Deferred gain on sale	—			(105		)
Total long term note receivable	$	2,720		$	2,559

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Property, Plant and Equipment

3 Months Ended

Jun. 30, 2018

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

Property, Plant and Equipment

The cost and accumulated depreciation of property and equipment at June 30, 2018 and March 31, 2018 are as follows (in thousands):

	June 30, 2018			March 31, 2018
Construction in progress - equipment	528			654
Equipment and software	72,466			72,760
Furniture and fixtures	1,890			1,878
Leasehold improvements	1,632			1,426
Property, plant and equipment, gross	76,516			76,718
Less accumulated depreciation	(64,962		)	(64,205		)
Property, plant and equipment, net	$	11,554		$	12,513

Depreciation expense was $1.1 million and $4.2 million for the three months ended June 30, 2018 and 2017, respectively. Included in depreciation expense for the three months ended June 30, 2017 is $2.5 million of accelerated depreciation recorded to cost of revenues related to revised estimates of the remaining useful lives of certain pieces of manufacturing equipment. Construction in progress - equipment primarily includes capital investments in the Company's newly leased facility in Ayer, Massachusetts.

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Accounts Payable and Accrued Expenses

3 Months Ended

Jun. 30, 2018

Payables and Accruals [Abstract]

Accounts Payable and Accrued Expenses

Accounts Payable and Accrued Expenses

Accounts payable and accrued expenses at June 30, 2018 and March 31, 2018 consisted of the following (in thousands):

	June 30, 2018		March 31, 2018
Accounts payable	$	3,863	$	3,096
Accrued inventories in-transit	144		1,207
Accrued other miscellaneous expenses	1,999		2,412
Advanced deposits	2,729		—
Accrued compensation	4,348		3,605
Income taxes payable	309		536
Accrued warranty	1,752		1,769
Total	$	15,144	$	12,625

The Company generally provides a one to two year warranty on its products, commencing upon delivery or installation where applicable. A provision is recorded upon revenue recognition to cost of revenues for estimated warranty expense based on historical experience.

Product warranty activity was as follows (in thousands):

	Three months ended June 30,
	2018			2017
Balance at beginning of period	$	1,769		$	2,344
Change in accruals for warranties during the period	104			41
Settlements during the period	(121		)	(359		)
Balance at end of period	$	1,752		$	2,026

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Income Taxes

3 Months Ended

Jun. 30, 2018

Income Tax Disclosure [Abstract]

Income Taxes

Income Taxes

The Company recorded an income tax benefit of less than $0.1 million in the three months ended June 30, 2018. The Company recorded income tax expense of $0.1 million in the three months ended June 30, 2017.  

On December 22, 2017, the Tax Cuts and Jobs Act of 2017 (the “Act”) was signed into law. ASC Topic 740 requires deferred tax assets and liabilities to be measured using the enacted rate for the period in which they are expected to reverse. Accordingly, the new 21% U.S. Federal corporate tax rate was used to measure the U.S. deferred tax assets and liabilities that will reverse in future periods. The Company's deferred tax attributes are generally subject to a full valuation allowance in the U.S. and thus, this adjustment to the attributes did not impact the tax provision. In addition, the new legislation includes a one-time transition tax in which all foreign earnings are deemed to be repatriated to the U.S. and taxable at specified rates included within the Act. The Company reviewed the accumulated foreign earnings aggregated across all non U.S. subsidiaries, net of foreign deficits. The Company believes it is in an aggregate net foreign deficit position for U.S. tax purposes and therefore not liable for the transition tax. The SEC staff issued Staff Accounting Bulletin No. 118, which provides guidance for companies that have not completed their accounting for the income tax effects of the Act in the period of enactment, allowing for a measurement period of up to one year after the enactment date to finalize the recording of the related tax impacts. The Company made reasonable estimates and does not anticipate significant revisions to the accounting for the tax impact of the Act, but has not completed the accounting for the tax effects of the Act at June 30, 2018. The Company will continue to assess its provision for income taxes as future guidance is issued, but does not currently anticipate significant revisions will be necessary. The ultimate impact may differ from the Company's provisional estimates, possibly materially, due to additional analysis, changes in interpretations and assumptions the Company has made, additional regulatory guidance that may be used and actions the Company may take as a result of the Act. The accounting is expected to be complete within the one year measurement period in accordance with the measurement period guidance outlined in Staff Accounting Bulletin No. 118.

Accounting for income taxes requires a two-step approach to recognizing and measuring uncertain tax positions.  The first step is to evaluate the tax position for recognition by determining if, based on the technical merits, it is more likely than not the position will be sustained upon audit, including resolution of related appeals or litigation processes, if any.  The second step is to measure the tax benefit as the largest amount that is more than 50% likely to be realized upon ultimate settlement.  The Company re-evaluates these uncertain tax positions on a quarterly basis.  The evaluation is based on factors including, but not limited to, changes in facts or circumstances, changes in tax law, effectively settled issues under audit and new audit activity.  Any changes in these factors could result in the recognition of a tax benefit or an additional charge to the tax provision.  The Company did not identify any uncertain tax positions in the three months ended June 30, 2018 and did not have any gross unrecognized tax benefits as of March 31, 2018.

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Warrants and Derivative Liabilities

3 Months Ended

Jun. 30, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Warrants and Derivative Liabilities

Warrants and Derivative Liabilities

The Company accounts for its warrants and contingent consideration as liabilities due to certain adjustment provisions within the instruments, which require that they be recorded at fair value. The warrants are subject to revaluation at each balance sheet date and any change in fair value is recorded as a change in fair value of warrants until the earlier of its expiration or its exercise at which time the warrant liability will be reclassified to equity. The Company calculated the fair value of the warrants utilizing an integrated lattice model. See Note 6, "Fair Value Measurements", for further discussion.

Hercules Warrants

The Company issued Hercules warrants to purchase 13,927 shares of common stock (the “First Warrant”) and 25,641 shares of common stock (the “Second Warrant”) in conjunction with prior term loans that have been repaid in full. On December 19, 2014, the Company entered into the Hercules Second Amendment. In conjunction with the agreement, the Company issued the Hercules Warrant to purchase 58,823 shares of the Company’s common stock.  The Hercules Warrant is exercisable at any time after its issuance at an exercise price of $7.85 per share, subject to certain price-based and other anti-dilution adjustments, including the equity offering in May 2017, the acquisition of ITC with common stock in September 2017 and sales of common stock under the ATM entered into in January 2017, and expires on June 30, 2020.  This warrant had a fair value of $0.1 million as of June 30, 2018 and March 31, 2018.

November 2014 Warrant

On November 13, 2014, the Company completed an offering of 909,090 units of the Company’s common stock with Hudson Bay Capital. Each unit consisted of one share of the Company’s common stock and 0.9 of a warrant to purchase one share of common stock, or a warrant to purchase in the aggregate 818,181 shares (the “November 2014 Warrant”).  The November 2014 Warrant is exercisable at any time, at an exercise price equal to $7.81 per share, subject to certain price-based and other anti-dilution adjustments including those noted above, and expires on November 13, 2019.  

Following is a summary of the key assumptions used to calculate the fair value of the November 2014 Warrant:

Fiscal Year 18	June 30, 2018
Risk-free interest rate	2.40%
Expected annual dividend yield	—
Expected volatility	67.40%
Term (years)	1.37
Fair value	$1.6 million

Fiscal Year 17	March 31, 2018	December 31, 2017	September 30, 2017	June 30, 2017
Risk-free interest rate	2.20%	1.87%	1.49%	1.44%
Expected annual dividend yield	—	—	—	—
Expected volatility	65.86%	65.86%	65.64%	67.21%
Term (years)	1.62	1.87	2.12	2.37
Fair value	$1.1 million	$0.4 million	$0.8 million	$0.9 million

The Company recorded a net loss of $0.5 million and a net gain of $0.9 million, resulting from an increase and decrease in the fair value of the November 2014 Warrant during the three months ended June 30, 2018 and 2017, respectively.

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Stockholders' Equity

3 Months Ended

Jun. 30, 2018

Equity [Abstract]

Stockholders' Equity

Stockholders’ Equity

Equity Offerings

On May 5, 2017, the Company entered into an underwriting agreement with Oppenheimer & Co. Inc., as representative of several underwriters named therein, relating to the issuance and sale (the "Offering") of 4.0 million shares of the Company's common stock at a public offering price of $4.00 per share. The net proceeds to the Company from the Offering were approximately $14.7 million, after deducting underwriting discounts and commissions and offering expenses payable by the Company. The Offering closed on May 10, 2017. In addition, the Company granted the underwriters a 30-day option (the “Option”) to purchase up to an additional 600,000 shares of common stock at the public offering price. On May 24, 2017, the underwriters notified the Company that they had exercised their Option in full. The net proceeds to the Company from the Option were approximately $2.3 million, after deducting underwriting discounts and commissions and offering expenses payable by the Company. The total net proceeds to the Company from the Offering and the Option were approximately $17.0 million, after deducting underwriting discounts and commissions and offering expenses payable by the Company. The Option closed on May 26, 2017. In conjunction with the equity offering, the Company terminated a previous At Market Issuance Sales Agreement ("ATM) with FBR Capital Markets & Co. where the Company could, at its discretion, sell up to $10.0 million of the Company's common stock.

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Commitments and Contingencies

3 Months Ended

Jun. 30, 2018

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Commitments and Contingencies

Legal Contingencies

From time to time, the Company is involved in legal and administrative proceedings and claims of various types. The Company records a liability in its consolidated financial statements for these matters when a loss is known or considered probable and the amount can be reasonably estimated. The Company reviews these estimates each accounting period as additional information is known and adjusts the loss provision when appropriate. If a matter is both probable to result in a liability and the amounts of loss can be reasonably estimated, the Company estimates and discloses the possible loss or range of loss to the extent necessary to make the consolidated financial statements not misleading. If the loss is not probable or cannot be reasonably estimated, a liability is not recorded in its consolidated financial statements.

On July 3, 2018, the Company, AMSC China and AMSC Austria entered into the Settlement Agreement with Sinovel. The Settlement Agreement settles the litigation and arbitration proceedings between the Company and Sinovel listed on Schedule 2 of the Settlement Agreement (the “Proceedings”), and any other civil claims, counterclaims, causes of action, rights and obligations directly or indirectly relating to the subject matters of the Proceedings and the contracts between the Company and Sinovel listed on Schedules 1 and 4 of the Settlement Agreement (the “Contracts”), subject to the exception described in Section 1.1 of the Settlement Agreement. The Settlement Agreement was filed as Exhibit 10.1 to the Company’s Form 8-K filed with the Securities and Exchange Commission on July 9, 2018.

Under the terms of the Settlement Agreement, Sinovel has agreed to pay AMSC China an aggregate cash amount in Renminbi (RMB) equivalent to $57.5 million, consisting of two installments. Sinovel paid the first installment of $32.5 million on July 4, 2018, and has agreed to pay the second installment of $25.0 million (the “Second Payment”) within ten (10) months after the U.S. District Court for the Western District of Wisconsin (the “District Court”) delivers the first sentence against Sinovel in the criminal case entitled United States v. Sinovel Wind Co., Ltd., Case Number 3:13-cr-00084-jdp. On July 6, 2018, the District Court delivered such sentence, and therefore the Second Payment is due by May 6, 2019 (the “Second Payment Due Date”). Mr. Wenyuan Wei, former Sinovel chairman and a current Sinovel shareholder, has delivered a letter of guarantee (the “Guarantee”) to the Company for the Second Payment should Sinovel fail to make such payment by the Second Payment Due Date.

In addition, pursuant to the terms of the Settlement Agreement, the Company and AMSC Austria have granted Sinovel a non-exclusive license for certain AMSC intellectual property to be used solely in Sinovel’s doubly fed wind turbines (the “License”). AMSC has agreed not to sue Sinovel, Sinovel’s power converter suppliers or Sinovel’s customers for use of the technology covered by the License. In the event that Sinovel or Mr. Wei does not make the Second Payment by the Second Payment Due Date, the Settlement Agreement provides that the License will terminate.

The Company and Sinovel have submitted withdrawal applications to terminate the Proceedings to the relevant Chinese courts and the Beijing Arbitration Commission. Subject to the Company and Sinovel complying with the terms of the Settlement Agreement, the Company and Sinovel have agreed not to re-institute any of the Proceedings. In addition, the Company and Sinovel have agreed to a mutual release and covenant not to sue covering all subject matters of the Proceedings and Contracts, effective upon the completion of the Second Payment.

Other

The Company enters into long-term construction contracts with customers that require the Company to obtain performance bonds. The Company is required to deposit an amount equivalent to some or all the face amount of the performance bonds into an escrow account until the termination of the bond. When the performance conditions are met, amounts deposited as collateral for the performance bonds are returned to the Company. In addition, the Company has various contractual arrangements in which minimum quantities of goods or services have been committed to be purchased on an annual basis.

As of June 30, 2018, the Company had $0.2 million of restricted cash included in long-term assets. These amounts included in restricted cash primarily represent deposits to secure letters of credit for various supply contracts. These deposits are held in interest bearing accounts.

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Restructuring

3 Months Ended

Jun. 30, 2018

Restructuring and Related Activities [Abstract]

Restructuring

Restructuring

The Company accounts for charges resulting from operational restructuring actions in accordance with ASC Topic 420, Exit or Disposal Cost Obligations (“ASC 420”) and ASC Topic 712, Compensation—Nonretirement Postemployment Benefits (“ASC 712”). In accounting for these obligations, the Company is required to make assumptions related to the amounts of employee severance, benefits, and related costs and the time period over which leased facilities will remain vacant, sublease terms, sublease rates and discount rates. Estimates and assumptions are based on the best information available at the time the obligation arises. These estimates are reviewed and revised as facts and circumstances dictate; changes in these estimates could have a material effect on the amount accrued on the consolidated balance sheet.

The $0.3 million charged to operations in the three months ended June 30, 2018 is related to exit costs incurred for the move of the Company's corporate office.

On April 3, 2017, the Board of Directors approved a plan to reduce the Company’s global workforce by approximately 8%, effective April 4, 2017. The purpose of the workforce reduction was to reduce operating expenses to better align with the Company’s current revenues. Included in the $1.3 million severance pay, charged to operations in the three months ended June 30, 2017, is $0.5 million of severance pay for one of the Company's former executive officers pursuant to the terms of a severance agreement dated June 30, 2017. Under the terms of the severance agreement, the Company's former executive officer is entitled to 18 months of his base salary, which is expected to be paid by December 31, 2018. From and after January 1, 2018, the Company, at its discretion, may settle any remaining unpaid cash severance owed to its former executive officer through the issuance of a number of immediately vested shares of the Company’s common stock, determined by multiplying the remaining unpaid cash severance owed by 120%, and then dividing by the closing stock price per share of the Company's common stock as of the last business day prior to the issuance of the shares.

All amounts related to these restructuring activities are expected to be paid by December 31, 2018.

The following table presents restructuring charges and cash payments for the three months ended June 30, 2018 and 2017(in thousands):

	Severance pay			Facility exit and
	and benefits			Relocation costs			Total
Accrued restructuring balance at April 1, 2018	$	262		$	173		$	435
Charges to operations	—			310			310
Cash payments	(97		)	(483		)	(580		)
Accrued restructuring balance at June 30, 2018	$	165		$	—		$	165

	Severance pay			Facility exit and
	and benefits			Relocation costs		Total
Accrued restructuring balance at April 1, 2017	$	—		$	—	$	—
Charges to operations	1,339			—		1,339
Cash payments	(423		)	—		(423		)
Accrued restructuring balance at June 30, 2017	$	916		$	—	$	916

All restructuring charges discussed above are included within restructuring in the Company’s unaudited condensed consolidated statements of operations. The Company includes accrued restructuring within accounts payable and accrued expenses.

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Business Segments

3 Months Ended

Jun. 30, 2018

Segment Reporting [Abstract]

Business Segments

Business Segments

The Company reports its financial results in two reportable business segments: Wind and Grid.

Through the Company’s Windtec Solutions, the Wind business segment enables manufacturers to field wind turbines with exceptional power output, reliability and affordability. The Company supplies advanced power electronics and control systems, licenses its highly engineered wind turbine designs, and provides extensive customer support services to wind turbine manufacturers. The Company’s design portfolio includes a broad range of drive trains and power ratings of 2 megawatts ("MWs") and higher. The Company provides a broad range of power electronics and software-based control systems that are highly integrated and designed for optimized performance, efficiency, and grid compatibility.

Through the Company’s Gridtec Solutions, the Grid business segment enables electric utilities and renewable energy project developers to connect, transmit and distribute power with exceptional efficiency, reliability and affordability. The sales process is enabled by transmission planning services that allow it to identify power grid congestion, poor power quality and other risks, which helps the Company determine how its solutions can improve network performance. These services often lead to sales of grid interconnection solutions for wind farms and solar power plants, power quality systems, and transmission and distribution cable systems. The Company also sells ship protection products to the U.S. Navy through its Grid business segment.

The operating results for the two business segments are as follows (in thousands):

	Three months ended June 30,
	2018		2017
Revenues:
Wind	$	3,678	$	2,278
Grid	8,929		6,645
Total	$	12,607	$	8,923

	Three months ended June 30,
	2018			2017
Operating loss:
Wind	$	(1,367	)	$	(4,433	)
Grid	(2,666		)	(8,167		)
Unallocated corporate expenses	(1,095		)	(2,093		)
Total	$	(5,128	)	$	(14,693	)

The accounting policies of the business segments are the same as those for the consolidated Company. The Company’s business segments have been determined in accordance with the Company’s internal management structure, which is organized based on operating activities. The Company evaluates performance based upon several factors, of which the primary financial measures are segment revenues and segment operating loss. The disaggregated financial results of the segments reflect allocation of certain functional expense categories consistent with the basis and manner in which Company management internally disaggregates financial information for the purpose of assisting in making internal operating decisions. In addition, certain corporate expenses which the Company does not believe are specifically attributable or allocable to either of the two business segments have been excluded from the segment operating loss.

Unallocated corporate expenses primarily consist of stock-based compensation expense of $0.8 million and $0.8 million in the three months ended June 30, 2018 and 2017, respectively. Additionally, restructuring charges of $0.3 million and $1.3 million are included in the three months ended June 30, 2018 and 2017, respectively.

Total assets for the two business segments as of June 30, 2018 and March 31, 2018 are as follows (in thousands):

	June 30, 2018		March 31, 2018
Wind	$	14,830	$	16,790
Grid	42,701		37,012
Corporate assets	26,915		34,373
Total	$	84,446	$	88,175

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Recent Accounting Pronouncements

3 Months Ended

Jun. 30, 2018

New Accounting Pronouncements and Changes in Accounting Principles [Abstract]

Recent Accounting Pronouncements

Recent Accounting Pronouncements

In May 2014, the Financial Accounting Standards Board (“FASB”) and the International Accounting Standards Board ("IASB") issued, ASU 2014-09, Revenue from Contracts with Customers (Topic 606). The guidance substantially converges final standards on revenue recognition between the FASB and IASB providing a framework on addressing revenue recognition issues and, upon its effective date, replaces almost all existing revenue recognition guidance, including industry-specific guidance, in current U.S. generally accepted accounting principles. The FASB has subsequently issued multiple amendments to ASU 2014-09 which are all effective for annual reporting periods beginning after December 15, 2017. 

As of April 1, 2018, the Company has adopted ASU 2014-09 and its amendments, reported the impact in its consolidated financial statements, and has implemented changes to its business processes, systems and controls to support revenue recognition and the related disclosures under this ASU. The Company’s assessment included a detailed review of representative contracts from each of the Company’s revenue streams and a comparison of its historical accounting policies and practices to the new standard. The Company adopted the new standards retrospectively with the cumulative effect of initially applying the guidance recognized at the date of initial application (the modified retrospective transition method) to all existing contracts that have remaining obligations as of April 1, 2018. Accordingly, the Company has elected to retroactively adjust only those contracts that do not meet the definition of a complete contract at the date of the initial application. This guidance will lead to recognizing certain revenue transactions sooner than in the past on certain contracts, as the Company will need to estimate the revenue it will be entitled to upon contract completion, and later on other contracts, such as Consulting and Statement of Work transactions, due to the lack of an enforceable right to payment for performance obligations satisfied over time. There are no changes in the accounting for its largest revenue stream which includes Inox Wind Ltd as its primary customer. Across other revenue streams such as DVAR Equipment and DVAR Turnkey, the timing of revenue recognition will be affected for multiple types of contracts, primarily multiple performance obligation contracts in its Grid business unit, but those differences did not have a material impact on its consolidated financial statements. The adjustment to opening accumulated deficit was not significant in the period commencing on April 1, 2018. Additionally, the adoption of this new standard is not expected to have any tax impact on the consolidated financial statements. As part of this analysis, the Company evaluated its information technology capabilities and systems, and did not incur significant information technology costs to modify systems currently in place.

In January 2016, the FASB issued ASU 2016-01, Financial Instruments-Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities.  The amendments in ASU 2016-01 will enhance the reporting model for financial instruments to provide users of financial statements with more decision-useful information. This ASU is effective for annual reporting periods beginning after December 15, 2017, and interim periods within those fiscal years.  The Company adopted ASU 2016-01 effective April 1, 2018 and noted no significant impact to its consolidated financial statements.

In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842). The guidance in this ASU supersedes the leasing guidance in Topic 840, Leases. Under the new guidance, lessees are required to recognize lease assets and lease liabilities on the balance sheet for all leases with terms longer than 12 months. Leases will be classified as either finance or operating, with classification affecting the pattern of expense recognition in the income statement.

• In July 2018, the FASB issued ASU 2018-10, Codification improvements to Topic 842, Leases. The amendments in ASU 2018-10 provide more clarification in regards to the application and requirements of ASU 2016-02.

This ASU and its amendments are effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. A modified retrospective transition approach is required for lessees for capital and operating leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements, with certain practical expedients available. The Company is currently evaluating the effects adoption of this guidance will have on its consolidated financial statements.

In June 2016, the FASB issued ASU 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. The amendments in ASU 2016-13 will provide more decision-useful information about the expected credit losses on financial instruments and other commitments to extend credit held by a reporting entity at each reporting date. The ASU is effective for annual reporting periods beginning after December 15, 2019, including interim periods within that year.  The Company is currently evaluating the impact, if any, the adoption of ASU 2016-13 may have on its consolidated financial statements.

In 2016, the FASB issued the following two ASU's on Statement of Cash Flows (Topic 230). Both amendments are effective for annual reporting periods beginning after December 15, 2017, including interim periods within that year.

• In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments. The amendments in ASU 2016-15 provide more guidance towards the classification of multiple different types of cash flows in order to reduce the diversity in reporting across entities.

• In November 2016, the FASB issued ASU 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash. The amendments in ASU 2016-18 explain the change during the period in the total of cash, cash equivalents, and amounts generally described as restricted cash or restricted cash equivalents. Therefore, amounts generally described as restricted cash and restricted cash equivalents should be included with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the statement of cash flows.

The Company adopted ASU 2016-15 and ASU 2016-18 effective April 1, 2018 and noted no significant impact to its consolidated financial statements.

In October 2016, the FASB issued ASU 2016-16, Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory. The amendments in ASU 2016-16 will improve the accounting for the income tax consequences of intra-entity transfers of assets other than inventory. The ASU is effective for annual reporting periods beginning after December 15, 2017, including interim periods within that year.  The Company adopted ASU 2016-16 effective April 1, 2018 and noted no significant impact to its consolidated financial statements.

In January 2017, the FASB issued ASU 2017-03, Accounting Changes and Error Corrections (Topic 250) and Investments - Equity Method and Joint Ventures. The amendments in ASU 2017-03 provide additional detail surrounding disclosures required related to adoption of new pronouncements. The ASU is effective for the periods of each related pronouncement.  The Company is currently evaluating the impact the adoption of ASU 2017-03 may have on its consolidated financial statements.

In February 2017, the FASB issued ASU 2017-05, Other Income - Gains and Losses from the Derecognition of Non-financial Assets (Subtopic 610-20). The amendments in ASU 2017-05 clarify the scope of Subtopic 610-20, Other Income-Gains and Losses from the Derecognition of Non-financial Assets, and to add guidance for partial sales of non-financial assets. Subtopic 610-20, which was issued in May 2014 as a part of ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606), provides guidance for recognizing gains and losses from the transfer of non-financial assets in contracts with non-customers.  The Company adopted ASU 2017-05 effective April 1, 2018 and adjusted the opening balance of accumulated deficit for $0.1 million for recognition of the deferred gain on the sale of the 64 Jackson Road building that occurred on March 28, 2018.

In May 2017, the FASB issued ASU 2017-09, Compensation - Stock Compensation (Subtopic 718) Scope of Modification Accounting. The amendments in ASU 2017-09 provide clarity and reduce both (1) diversity in practice and (2) cost and complexity when applying the guidance in Topic 718, Compensation—Stock Compensation, to a change to the terms or conditions of a share-based payment award.  The ASU is effective for annual reporting periods beginning after December 15, 2017, including interim periods within those periods. The Company adopted ASU 2017-09 effective April 1, 2018 and noted no significant impact to its consolidated financial statements.

In July 2017, the FASB issued ASU 2017-11, Earnings per Share (Topic 260), Distinguishing Liabilities from Equity (Topic 480), and Derivatives and Hedging (Topic 815). The amendments in ASU 2017-11 provide guidance for freestanding equity-linked financial instruments, such as warrants and conversion options in convertible debt or preferred stock, and should no longer be accounted for as a derivative liability at fair value as a result of the existence of a down round feature. The ASU is effective for annual reporting periods beginning after December 15, 2018, including interim periods within those periods. The Company is currently evaluating the impact the adoption of ASU 2017-11 may have on its consolidated financial statements.

In August 2017, the FASB issued ASU 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities. The amendments in ASU 2017-12 provide improved financial reporting of hedging relationships to better portray the economic results of an entity’s risk management activities in its financial statements. In addition, the amendments in this update make certain targeted improvements to simplify the application of the hedge accounting guidance. The ASU is effective for annual reporting periods beginning after December 15, 2018, including interim periods within those periods. The Company is currently evaluating the impact the adoption of ASU 2017-12 may have on its consolidated financial statements.

In June 2018, the FASB issued ASU 2018-07, Compensation - Stock Compensation (Topic 718): Improvements to Non-Employee Share Based Payment Accounting. The amendments in ASU 2018-07 provide for the simplification of the measurement of share-based payment transactions for acquiring goods and services from non-employees. The ASU is effective for annual reporting periods beginning after December 15, 2018, including interim periods within those periods. The Company is currently evaluating the impact the adoption of ASU 2018-07 may have on its consolidated financial statements.

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Subsequent Events

3 Months Ended

Jun. 30, 2018

Subsequent Events [Abstract]

Subsequent Events

Subsequent Events

The Company has performed an evaluation of subsequent events through the time of filing this Quarterly Report on Form 10-Q with the SEC, apart from the Settlement Agreement with Sinovel described in Note 15, "Commitments and Contingencies," the Company has determined that there are no such events to report.

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Nature of the Business and Operations and Liquidity (Policies)

3 Months Ended

Jun. 30, 2018

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Nature of the Business and Operations

These unaudited condensed consolidated financial statements of the Company have been prepared on a going concern basis in accordance with United States generally accepted accounting principles (“GAAP”) and the Securities and Exchange Commission’s (“SEC”) instructions to Form 10-Q. The going concern basis of presentation assumes that the Company will continue operations and will be able to realize its assets and discharge its liabilities and commitments in the normal course of business. Certain information and footnote disclosures normally included in the financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to those instructions. The year-end condensed balance sheet data was derived from audited financial statements but does not include all disclosures required by GAAP. The unaudited condensed consolidated financial statements, in the opinion of management, reflect all adjustments (consisting of normal recurring adjustments) necessary for a fair statement of the results for the interim periods ended June 30, 2018 and 2017 and the financial position at June 30, 2018; however, these results are not necessarily indicative of results which may be expected for the full year. The interim condensed consolidated financial statements, and notes thereto, should be read in conjunction with the audited consolidated financial statements for the year ended March 31, 2018, and notes thereto, included in the Company’s annual report on Form 10-K for the year ended March 31, 2018 filed with the Securities and Exchange Commission on June 6, 2018.

Recent Accounting Pronouncements

In May 2014, the Financial Accounting Standards Board (“FASB”) and the International Accounting Standards Board ("IASB") issued, ASU 2014-09, Revenue from Contracts with Customers (Topic 606). The guidance substantially converges final standards on revenue recognition between the FASB and IASB providing a framework on addressing revenue recognition issues and, upon its effective date, replaces almost all existing revenue recognition guidance, including industry-specific guidance, in current U.S. generally accepted accounting principles. The FASB has subsequently issued multiple amendments to ASU 2014-09 which are all effective for annual reporting periods beginning after December 15, 2017. 

As of April 1, 2018, the Company has adopted ASU 2014-09 and its amendments, reported the impact in its consolidated financial statements, and has implemented changes to its business processes, systems and controls to support revenue recognition and the related disclosures under this ASU. The Company’s assessment included a detailed review of representative contracts from each of the Company’s revenue streams and a comparison of its historical accounting policies and practices to the new standard. The Company adopted the new standards retrospectively with the cumulative effect of initially applying the guidance recognized at the date of initial application (the modified retrospective transition method) to all existing contracts that have remaining obligations as of April 1, 2018. Accordingly, the Company has elected to retroactively adjust only those contracts that do not meet the definition of a complete contract at the date of the initial application. This guidance will lead to recognizing certain revenue transactions sooner than in the past on certain contracts, as the Company will need to estimate the revenue it will be entitled to upon contract completion, and later on other contracts, such as Consulting and Statement of Work transactions, due to the lack of an enforceable right to payment for performance obligations satisfied over time. There are no changes in the accounting for its largest revenue stream which includes Inox Wind Ltd as its primary customer. Across other revenue streams such as DVAR Equipment and DVAR Turnkey, the timing of revenue recognition will be affected for multiple types of contracts, primarily multiple performance obligation contracts in its Grid business unit, but those differences did not have a material impact on its consolidated financial statements. The adjustment to opening accumulated deficit was not significant in the period commencing on April 1, 2018. Additionally, the adoption of this new standard is not expected to have any tax impact on the consolidated financial statements. As part of this analysis, the Company evaluated its information technology capabilities and systems, and did not incur significant information technology costs to modify systems currently in place.

In January 2016, the FASB issued ASU 2016-01, Financial Instruments-Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities.  The amendments in ASU 2016-01 will enhance the reporting model for financial instruments to provide users of financial statements with more decision-useful information. This ASU is effective for annual reporting periods beginning after December 15, 2017, and interim periods within those fiscal years.  The Company adopted ASU 2016-01 effective April 1, 2018 and noted no significant impact to its consolidated financial statements.

In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842). The guidance in this ASU supersedes the leasing guidance in Topic 840, Leases. Under the new guidance, lessees are required to recognize lease assets and lease liabilities on the balance sheet for all leases with terms longer than 12 months. Leases will be classified as either finance or operating, with classification affecting the pattern of expense recognition in the income statement.

• In July 2018, the FASB issued ASU 2018-10, Codification improvements to Topic 842, Leases. The amendments in ASU 2018-10 provide more clarification in regards to the application and requirements of ASU 2016-02.

This ASU and its amendments are effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. A modified retrospective transition approach is required for lessees for capital and operating leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements, with certain practical expedients available. The Company is currently evaluating the effects adoption of this guidance will have on its consolidated financial statements.

In June 2016, the FASB issued ASU 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. The amendments in ASU 2016-13 will provide more decision-useful information about the expected credit losses on financial instruments and other commitments to extend credit held by a reporting entity at each reporting date. The ASU is effective for annual reporting periods beginning after December 15, 2019, including interim periods within that year.  The Company is currently evaluating the impact, if any, the adoption of ASU 2016-13 may have on its consolidated financial statements.

In 2016, the FASB issued the following two ASU's on Statement of Cash Flows (Topic 230). Both amendments are effective for annual reporting periods beginning after December 15, 2017, including interim periods within that year.

• In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments. The amendments in ASU 2016-15 provide more guidance towards the classification of multiple different types of cash flows in order to reduce the diversity in reporting across entities.

• In November 2016, the FASB issued ASU 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash. The amendments in ASU 2016-18 explain the change during the period in the total of cash, cash equivalents, and amounts generally described as restricted cash or restricted cash equivalents. Therefore, amounts generally described as restricted cash and restricted cash equivalents should be included with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the statement of cash flows.

The Company adopted ASU 2016-15 and ASU 2016-18 effective April 1, 2018 and noted no significant impact to its consolidated financial statements.

In October 2016, the FASB issued ASU 2016-16, Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory. The amendments in ASU 2016-16 will improve the accounting for the income tax consequences of intra-entity transfers of assets other than inventory. The ASU is effective for annual reporting periods beginning after December 15, 2017, including interim periods within that year.  The Company adopted ASU 2016-16 effective April 1, 2018 and noted no significant impact to its consolidated financial statements.

In January 2017, the FASB issued ASU 2017-03, Accounting Changes and Error Corrections (Topic 250) and Investments - Equity Method and Joint Ventures. The amendments in ASU 2017-03 provide additional detail surrounding disclosures required related to adoption of new pronouncements. The ASU is effective for the periods of each related pronouncement.  The Company is currently evaluating the impact the adoption of ASU 2017-03 may have on its consolidated financial statements.

In February 2017, the FASB issued ASU 2017-05, Other Income - Gains and Losses from the Derecognition of Non-financial Assets (Subtopic 610-20). The amendments in ASU 2017-05 clarify the scope of Subtopic 610-20, Other Income-Gains and Losses from the Derecognition of Non-financial Assets, and to add guidance for partial sales of non-financial assets. Subtopic 610-20, which was issued in May 2014 as a part of ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606), provides guidance for recognizing gains and losses from the transfer of non-financial assets in contracts with non-customers.  The Company adopted ASU 2017-05 effective April 1, 2018 and adjusted the opening balance of accumulated deficit for $0.1 million for recognition of the deferred gain on the sale of the 64 Jackson Road building that occurred on March 28, 2018.

In May 2017, the FASB issued ASU 2017-09, Compensation - Stock Compensation (Subtopic 718) Scope of Modification Accounting. The amendments in ASU 2017-09 provide clarity and reduce both (1) diversity in practice and (2) cost and complexity when applying the guidance in Topic 718, Compensation—Stock Compensation, to a change to the terms or conditions of a share-based payment award.  The ASU is effective for annual reporting periods beginning after December 15, 2017, including interim periods within those periods. The Company adopted ASU 2017-09 effective April 1, 2018 and noted no significant impact to its consolidated financial statements.

In July 2017, the FASB issued ASU 2017-11, Earnings per Share (Topic 260), Distinguishing Liabilities from Equity (Topic 480), and Derivatives and Hedging (Topic 815). The amendments in ASU 2017-11 provide guidance for freestanding equity-linked financial instruments, such as warrants and conversion options in convertible debt or preferred stock, and should no longer be accounted for as a derivative liability at fair value as a result of the existence of a down round feature. The ASU is effective for annual reporting periods beginning after December 15, 2018, including interim periods within those periods. The Company is currently evaluating the impact the adoption of ASU 2017-11 may have on its consolidated financial statements.

In August 2017, the FASB issued ASU 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities. The amendments in ASU 2017-12 provide improved financial reporting of hedging relationships to better portray the economic results of an entity’s risk management activities in its financial statements. In addition, the amendments in this update make certain targeted improvements to simplify the application of the hedge accounting guidance. The ASU is effective for annual reporting periods beginning after December 15, 2018, including interim periods within those periods. The Company is currently evaluating the impact the adoption of ASU 2017-12 may have on its consolidated financial statements.

In June 2018, the FASB issued ASU 2018-07, Compensation - Stock Compensation (Topic 718): Improvements to Non-Employee Share Based Payment Accounting. The amendments in ASU 2018-07 provide for the simplification of the measurement of share-based payment transactions for acquiring goods and services from non-employees. The ASU is effective for annual reporting periods beginning after December 15, 2018, including interim periods within those periods. The Company is currently evaluating the impact the adoption of ASU 2018-07 may have on its consolidated financial statements.

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Revenue Recognition (Tables)

3 Months Ended

Jun. 30, 2018

Revenue from Contract with Customer [Abstract]

Cumulative effect of ASU 2014-09

The cumulative effect to the Company’s consolidated April 1, 2018 balance sheet from the adoption of the new revenue standard and the sale of nonfinancial assets was as follows (in thousands):

	March 31, 2018			Opening Adjustment			April 1, 2018
Assets:
Inventory	$	19,780		$	(1,599	)	$	18,181
Prepaid expenses and other current assets	2,947			1,599			4,546
Notes receivable, long term portion	2,559			105			2,664
Liabilities and Stockholders' Equity:
Accounts payable and accrued expenses	$	(12,625	)	$	(2,729	)	$	(15,354	)
Deferred revenue	(13,483		)	2,657			(10,826		)
Accumulated deficit	$	(988,333	)	$	(33	)	$	(988,366	)

Disaggregation of Revenue

The following tables disaggregate the Company’s revenue by product line and by shipment destination:

	Three months ended June 30, 2018
Product Line:	Grid		Wind
Equipment and systems	$	7,462	$	3,492
Services and technology development	1,467		186
Total	$	8,929	$	3,678
Region:
Americas	$	7,496	$	23
Asia Pacific	808		3,595
EMEA	625		60
Total	$	8,929	$	3,678

Contract with Customer

Changes in the Company’s contract assets, which are included in “Unbilled AR” and "Deferred program costs" (see Note 7, “Accounts Receivable” and Note 8, "Inventory" for a reconciliation to the condensed consolidated balance sheet) and contract liabilities, which are included in the current portion and long term portion of “deferred revenue” in the Company’s condensed consolidated balance sheets, are as follows:

	Unbilled AR			Deferred Program Costs			Contract Liabilities
Beginning balance as of March 31, 2018	$	3,016		$	2,567		$	21,937
Impact of adoption of ASC 606	—			(1,599		)	(2,657		)
Increases for costs incurred to fulfill performance obligations	—			1,132			—
Increase (decrease) due to customer billings	(3,221		)	—			4,281
Decrease due to cost recognition on completed performance obligations	—			(48		)	—
Increase (decrease) due to recognition of revenue based on transfer of control of performance obligations	4,824			(9		)	(3,324		)
Other changes and FX impact	(16		)	34			(764		)
Ending balance as of June 30, 2018	$	4,603		$	2,077		$	19,473

Schedule of Revenues by Major Customers

The following table sets forth customers who represented 10% or more of the Company’s total revenues for the three months ended June 30, 2018 and 2017:

	Reportable Segment	June 30, 2018		June 30, 2017
Inox Wind Limited	Wind	25	%	22	%
Vestas	Grid	36	%	—	%
U.S. Navy	Grid	<10%		35	%

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Stock-Based Compensation (Tables)

3 Months Ended

Jun. 30, 2018

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

Summary of Stock-Based Compensation Expense

The following table summarizes stock-based compensation expense by financial statement line item for the three months ended June 30, 2018 and 2017 (in thousands):

	Three months ended June 30,
	2018		2017
Cost of revenues	$	40	$	36
Research and development	51		49
Selling, general and administrative	694		669
Total	$	785	$	754

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Computation of Net Loss per Common Share (Tables)

3 Months Ended

Jun. 30, 2018

Earnings Per Share [Abstract]

Reconciliation of Numerators and Denominators of EPS Calculation

The following table reconciles the numerators and denominators of the earnings per share calculation for the three months ended June 30, 2018 and 2017 (in thousands, except per share data):

	Three months ended June 30,
	2018			2017
Numerator:
Net loss	$	(4,737	)	$	(15,252	)
Denominator:
Weighted-average shares of common stock outstanding	20,999			17,089
Weighted-average shares subject to repurchase	(832		)	(311		)
Shares used in per-share calculation ― basic	20,167			16,778
Shares used in per-share calculation ― diluted	20,167			16,778
Net loss per share ― basic	$	(0.23	)	$	(0.91	)
Net loss per share ― diluted	$	(0.23	)	$	(0.91	)

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Fair Value Measurements (Tables)

3 Months Ended

Jun. 30, 2018

Fair Value Disclosures [Abstract]

Schedule of Assets and Liabilities Carried at Fair Value on Recurring Basis

The following table provides the assets and liabilities carried at fair value on a recurring basis, measured as of June 30, 2018 and March 31, 2018 (in thousands):

	Total Carrying Value		Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
June 30, 2018:
Assets:
Cash equivalents	$	24,704	$	24,704	$	—	$	—
Derivative liabilities:
Warrants	1,681		—		—		1,681

	Total Carrying Value		Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
March 31, 2018:
Assets:
Cash equivalents	$	32,589	$	32,589	$	—	$	—
Derivative liabilities:
Warrants	$	1,217	$	—	$	—	$	1,217

Schedule of Liabilities Measured at Fair Value on Recurring Basis

The table below reflects the activity for the Company’s major classes of liabilities measured at fair value on a recurring basis (in thousands):

	Warrants
April 1, 2018	$	1,217
Mark to market adjustment	464
Balance at June 30, 2018	$	1,681

	Warrants
April 1, 2017	$	1,923
Mark to market adjustment	(925		)
Balance at June 30, 2017	$	998

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Accounts Receivable (Tables)

3 Months Ended

Jun. 30, 2018

Receivables [Abstract]

Schedule of Accounts Receivable

Accounts receivable at June 30, 2018 and March 31, 2018 consisted of the following (in thousands):

	June 30, 2018			March 31, 2018
Accounts receivable (billed)	$	6,983		$	4,403
Accounts receivable (unbilled)	4,603			3,016
Less: Allowance for doubtful accounts	(54		)	(54		)
Accounts receivable, net	$	11,532		$	7,365

Note receivable as of June 30, 2018 and March 31, 2018 consisted of the following (in thousands):

Current assets	June 30, 2018			March 31, 2018
Note receivable, current	$	3,000		$	3,000
Total current note receivable	$	3,000		$	3,000
Long term assets
Note receivable, long term	$	3,000		$	3,000
Note receivable discount	(280		)	(336		)
Deferred gain on sale	—			(105		)
Total long term note receivable	$	2,720		$	2,559

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Inventory (Tables)

3 Months Ended

Jun. 30, 2018

Inventory Disclosure [Abstract]

Schedule of Inventory

Inventory, net of reserves, at June 30, 2018 and March 31, 2018 consisted of the following (in thousands):

	June 30, 2018		March 31, 2018
Raw materials	$	6,316	$	7,526
Work-in-process	1,327		920
Finished goods	8,633		8,767
Deferred program costs	2,077		2,567
Net inventory	$	18,353	$	19,780

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Note Receivable (Tables)

3 Months Ended

Jun. 30, 2018

Receivables [Abstract]

Schedule of Notes Receivable

Accounts receivable at June 30, 2018 and March 31, 2018 consisted of the following (in thousands):

	June 30, 2018			March 31, 2018
Accounts receivable (billed)	$	6,983		$	4,403
Accounts receivable (unbilled)	4,603			3,016
Less: Allowance for doubtful accounts	(54		)	(54		)
Accounts receivable, net	$	11,532		$	7,365

Note receivable as of June 30, 2018 and March 31, 2018 consisted of the following (in thousands):

Current assets	June 30, 2018			March 31, 2018
Note receivable, current	$	3,000		$	3,000
Total current note receivable	$	3,000		$	3,000
Long term assets
Note receivable, long term	$	3,000		$	3,000
Note receivable discount	(280		)	(336		)
Deferred gain on sale	—			(105		)
Total long term note receivable	$	2,720		$	2,559

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Property, Plant and Equipment (Tables)

3 Months Ended

Jun. 30, 2018

Property, Plant and Equipment [Abstract]

Schedule of Costs and Accumulated Depreciation of Plant and Equipment

The cost and accumulated depreciation of property and equipment at June 30, 2018 and March 31, 2018 are as follows (in thousands):

	June 30, 2018			March 31, 2018
Construction in progress - equipment	528			654
Equipment and software	72,466			72,760
Furniture and fixtures	1,890			1,878
Leasehold improvements	1,632			1,426
Property, plant and equipment, gross	76,516			76,718
Less accumulated depreciation	(64,962		)	(64,205		)
Property, plant and equipment, net	$	11,554		$	12,513

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Accounts Payable and Accrued Expenses (Tables)

3 Months Ended

Jun. 30, 2018

Payables and Accruals [Abstract]

Schedule of Accounts Payable and Accrued Expenses

Accounts payable and accrued expenses at June 30, 2018 and March 31, 2018 consisted of the following (in thousands):

	June 30, 2018		March 31, 2018
Accounts payable	$	3,863	$	3,096
Accrued inventories in-transit	144		1,207
Accrued other miscellaneous expenses	1,999		2,412
Advanced deposits	2,729		—
Accrued compensation	4,348		3,605
Income taxes payable	309		536
Accrued warranty	1,752		1,769
Total	$	15,144	$	12,625

Schedule of Product Warranty Activity

Product warranty activity was as follows (in thousands):

	Three months ended June 30,
	2018			2017
Balance at beginning of period	$	1,769		$	2,344
Change in accruals for warranties during the period	104			41
Settlements during the period	(121		)	(359		)
Balance at end of period	$	1,752		$	2,026

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Warrants and Derivative Liabilities (Tables)

3 Months Ended

Jun. 30, 2018

November 2014 Warrant

Class Of Warrant Or Right [Line Items]

Schedule of Assumptions Used to Calculate the Fair Value of Warrants

Following is a summary of the key assumptions used to calculate the fair value of the November 2014 Warrant:

Fiscal Year 18	June 30, 2018
Risk-free interest rate	2.40%
Expected annual dividend yield	—
Expected volatility	67.40%
Term (years)	1.37
Fair value	$1.6 million

Fiscal Year 17	March 31, 2018	December 31, 2017	September 30, 2017	June 30, 2017
Risk-free interest rate	2.20%	1.87%	1.49%	1.44%
Expected annual dividend yield	—	—	—	—
Expected volatility	65.86%	65.86%	65.64%	67.21%
Term (years)	1.62	1.87	2.12	2.37
Fair value	$1.1 million	$0.4 million	$0.8 million	$0.9 million

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Restructuring (Tables)

3 Months Ended

Jun. 30, 2018

Restructuring and Related Activities [Abstract]

Restructuring Costs

The following table presents restructuring charges and cash payments for the three months ended June 30, 2018 and 2017(in thousands):

	Severance pay			Facility exit and
	and benefits			Relocation costs			Total
Accrued restructuring balance at April 1, 2018	$	262		$	173		$	435
Charges to operations	—			310			310
Cash payments	(97		)	(483		)	(580		)
Accrued restructuring balance at June 30, 2018	$	165		$	—		$	165

	Severance pay			Facility exit and
	and benefits			Relocation costs		Total
Accrued restructuring balance at April 1, 2017	$	—		$	—	$	—
Charges to operations	1,339			—		1,339
Cash payments	(423		)	—		(423		)
Accrued restructuring balance at June 30, 2017	$	916		$	—	$	916

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Business Segments (Tables)

3 Months Ended

Jun. 30, 2018

Segment Reporting [Abstract]

Schedule of Operating Results for Business Segments

The operating results for the two business segments are as follows (in thousands):

	Three months ended June 30,
	2018		2017
Revenues:
Wind	$	3,678	$	2,278
Grid	8,929		6,645
Total	$	12,607	$	8,923

	Three months ended June 30,
	2018			2017
Operating loss:
Wind	$	(1,367	)	$	(4,433	)
Grid	(2,666		)	(8,167		)
Unallocated corporate expenses	(1,095		)	(2,093		)
Total	$	(5,128	)	$	(14,693	)

Schedule of Total Assets for Segments

Total assets for the two business segments as of June 30, 2018 and March 31, 2018 are as follows (in thousands):

	June 30, 2018		March 31, 2018
Wind	$	14,830	$	16,790
Grid	42,701		37,012
Corporate assets	26,915		34,373
Total	$	84,446	$	88,175

Schedule of Revenues by Major Customers

The following table sets forth customers who represented 10% or more of the Company’s total revenues for the three months ended June 30, 2018 and 2017:

	Reportable Segment	June 30, 2018		June 30, 2017
Inox Wind Limited	Wind	25	%	22	%
Vestas	Grid	36	%	—	%
U.S. Navy	Grid	<10%		35	%

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Nature of the Business and Operations and Liquidity - Additional Information (Detail) $ in Thousands								1 Months Ended		3 Months Ended		75 Months Ended
	May 06, 2019	Jul. 24, 2018 USD ($)	Jul. 04, 2018 USD ($)	Jul. 03, 2018 USD ($) installment	Mar. 28, 2018 USD ($)	Feb. 01, 2018 USD ($)	May 10, 2017 USD ($)	May 26, 2017 USD ($)	Dec. 31, 2015 USD ($)	Jun. 30, 2018 USD ($) employee	Jun. 30, 2017 USD ($)	Jun. 30, 2018 USD ($) employee	Mar. 31, 2018 USD ($)
Description Of Business [Line Items]
Retained earnings (accumulated deficit)										$ (993,037)		$ (993,037)	$ (988,333)
Cash and cash equivalents										26,750		$ 26,750	34,084
Net cash used in operating activities										$ (6,886)	$ (5,430)
Number of workforce persons | employee										231		231
Cash flows from financing activities												$ 85,000
Proceeds from additional equity offering							$ 17,000	$ 17,000
Note receivable										$ 2,720		$ 2,720	$ 2,559
64 Jackson LLC
Description Of Business [Line Items]
Purchase and sale agreement, total consideration					$ 23,000	$ 23,000
Purchase and sale agreement, sale of property					17,000
Note receivable					6,000	$ 6,000
Purchase and sale agreement, proceeds from sale of property, plant and equipment, net					$ 16,900
Interest rate					1.96%					1.96%		1.96%
Inox Wind Limited
Description Of Business [Line Items]
Strategic agreements value									$ 210,000
Manufacturing agreement period, additional period required									3 years
Subsequent Event | Sinovel Wind Group Co. Ltd.
Description Of Business [Line Items]
Litigation settlement, amount awarded from other party				$ 57,500
Proceeds from settlement			$ 32,500
Number of installments | installment				2
Settlement, amount awarded			$ 25,000
Forecast | Sinovel Wind Group Co. Ltd.
Description Of Business [Line Items]
Payment period	10 months
AMSC Austria | Subsequent Event
Description Of Business [Line Items]
Amount due to subsidiary		$ 30,700

XML

Revenue Recognition - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2018	Mar. 31, 2018
Product Warranty Liability [Line Items]
Revenue recognized, percentage	82.00%
Remaining performance obligation	$ 50.6
Minimum
Product Warranty Liability [Line Items]
Warranty period	1 year
Remaining performance obligation, expected timing of satisfaction	13 months
Maximum
Product Warranty Liability [Line Items]
Warranty period	2 years
Extended service warranty, term	4 years
Remaining performance obligation, expected timing of satisfaction	60 months
Accounting Standards Update 2014-09
Product Warranty Liability [Line Items]
Adjustment to retained earnings (less than)		$ 0.1
Accounting Standards Update 2017-05
Product Warranty Liability [Line Items]
Adjustment to retained earnings (less than)		$ 0.1

XML

Revenue Recognition - Cumulative Effect of ASU 2014-09 (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Apr. 01, 2018	Mar. 31, 2018
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Inventory	$ 18,353		$ 19,780
Prepaid expenses and other current assets	4,709		2,947
Note receivable	2,720		2,559
Accounts payable and accrued expenses	(15,144)		(12,625)
Deferred revenue	(8,040)		(8,454)
Accumulated deficit	$ (993,037)		(988,333)
Accounting Standards Update 2014-09
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Inventory		$ 18,181
Prepaid expenses and other current assets		4,546
Note receivable		2,664
Accounts payable and accrued expenses		(15,354)
Deferred revenue		(10,826)
Accumulated deficit		$ (988,366)
Difference between Revenue Guidance in Effect before and after Topic 606 | Accounting Standards Update 2014-09
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Inventory			(1,599)
Prepaid expenses and other current assets			1,599
Note receivable			105
Accounts payable and accrued expenses			(2,729)
Deferred revenue			2,657
Accumulated deficit			(33)
Calculated under Revenue Guidance in Effect before Topic 606 | Accounting Standards Update 2014-09
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Inventory			19,780
Prepaid expenses and other current assets			2,947
Note receivable			2,559
Accounts payable and accrued expenses			(12,625)
Deferred revenue			(13,483)
Accumulated deficit			$ (988,333)

XML

Revenue Recognition - Disaggregation of Revenue (Details) $ in Thousands	3 Months Ended
	Jun. 30, 2018 USD ($)
Grid
Disaggregation of Revenue [Line Items]
Revenue	$ 8,929
Grid | Americas
Disaggregation of Revenue [Line Items]
Revenue	7,496
Grid | Asia Pacific
Disaggregation of Revenue [Line Items]
Revenue	808
Grid | EMEA
Disaggregation of Revenue [Line Items]
Revenue	625
Grid | Equipment and systems
Disaggregation of Revenue [Line Items]
Revenue	7,462
Grid | Services and technology development
Disaggregation of Revenue [Line Items]
Revenue	1,467
Wind
Disaggregation of Revenue [Line Items]
Revenue	3,678
Wind | Americas
Disaggregation of Revenue [Line Items]
Revenue	23
Wind | Asia Pacific
Disaggregation of Revenue [Line Items]
Revenue	3,595
Wind | EMEA
Disaggregation of Revenue [Line Items]
Revenue	60
Wind | Equipment and systems
Disaggregation of Revenue [Line Items]
Revenue	3,492
Wind | Services and technology development
Disaggregation of Revenue [Line Items]
Revenue	$ 186

XML

Revenue Recognition - Contract Asset and Liability (Details) $ in Thousands	3 Months Ended
	Jun. 30, 2018 USD ($)
Contract With Customer, Asset And Liability [Roll Forward]
Unbilled AR, Beginning balance as of March 31, 2018	$ 3,016
Deferred Program Costs, Beginning balance as of March 31, 2018	2,567
Contract Liabilities, Beginning balance as of March 31, 2018	21,937
Deferred Program Costs, Increases for costs incurred to fulfill performance obligations	1,132
Unbilled AR, Increase (decrease) due to customer billings	(3,221)
Contract Liabilities, Increases (decreases) due to customer billings	4,281
Deferred Program Costs, Decrease due to cost recognition on completed performance obligations	(48)
Unbilled AR, Increase (decrease) due to recognition of revenue based on transfer of control of performance obligations	4,824
Deferred Program Costs, Increase (decrease) due to recognition of revenue based on transfer of control of performance obligations	(9)
Contract Liabilities, Increase (decrease) due to recognition of revenue based on transfer of control of performance obligations	(3,324)
Unbilled AR, Other changes and FX impact	(16)
Deferred Program Costs, Other changes and FX impact	34
Contract Liabilities, Other changes and FX impact	(764)
Unbilled AR, Ending balance as of June 30, 2018	4,603
Deferred Program Costs, Ending Balance as of June 30, 2018	2,077
Contract Liabilities, Ending balance as of June 30, 2018	19,473
Accounting Standards Update 2014-09
Contract With Customer, Asset And Liability [Roll Forward]
Unbilled AR, Impact of adoption of ASC 606	0
Deferred Program Costs, Impact of adoption of ASC 606	(1,599)
Contract Liabilities, Impact of adoption of ASC 606	$ (2,657)

XML

Revenue Recognition - Performance obligations (Details) $ in Millions	Jun. 30, 2018 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 50.6
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2014-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 8.1

XML

Revenue Recognition - Schedule of Revenue by Customers (Details) - Customer concentration risk - Revenue	3 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Wind | Inox Wind Limited
Revenue, Major Customer [Line Items]
Concentration risk, revenue	25.00%	22.00%
Grid | Vestas WTG Mexico
Revenue, Major Customer [Line Items]
Concentration risk, revenue	36.00%	0.00%
Grid | U.S. Navy
Revenue, Major Customer [Line Items]
Concentration risk, revenue		35.00%

XML

Stock-Based Compensation - Summary of Stock-Based Compensation Expense (Detail) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Total stock-based compensation expense	$ 785	$ 754
Cost of revenues
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Total stock-based compensation expense	40	36
Research and development
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Total stock-based compensation expense	51	49
Selling, general and administrative
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Total stock-based compensation expense	$ 694	$ 669

XML

Stock-Based Compensation - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Immediately vested common stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants in period (in shares)	34,480	33,487
Restricted stock awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants in period (in shares)	276,000
Unrecognized compensation cost for unvested employee stock-based compensation awards outstanding, net of forfeitures	$ 3.5
Weighted-average period over which unrecognized compensation expense is expected to be recognized	2 years 1 month
Restricted stock units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants in period (in shares)		16,667
Vesting period	8 days
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost for unvested employee stock-based compensation awards outstanding, net of forfeitures	$ 0.2
Weighted-average period over which unrecognized compensation expense is expected to be recognized	8 months
Options granted in period (in shares)	0	0
Minimum | Restricted stock awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	2 years	2 years
Maximum | Restricted stock awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years	3 years

XML

Computation of Net Loss per Common Share - Additional Information (Detail) - shares shares in Millions	3 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive shares excluded from calculation of diluted EPS (in shares)	1.1	1.5
Stock options
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive shares excluded from calculation of diluted EPS (in shares)	0.2	0.3
Warrants
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive shares excluded from calculation of diluted EPS (in shares)	0.9	1.2

XML

Computation of Net Loss per Common Share - Reconciliation of Numerators and Denominators of EPS Calculation (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Numerator:
Net loss	$ (4,737)	$ (15,252)
Denominator:
Weighted-average shares of common stock outstanding (in shares)	20,999	17,089
Weighted-average shares subject to repurchase (in shares)	(832)	(311)
Shares used in per-share calculation ― basic (in shares)	20,167	16,778
Shares used in per-share calculation ― diluted (in shares)	20,167	16,778
Net loss per share ― basic (in dollars per share)	$ (0.23)	$ (0.91)
Net loss per share ― diluted (in dollars per share)	$ (0.23)	$ (0.91)

XML

Acquisition and Related Goodwill - Additional Information (Details) $ in Thousands	Sep. 25, 2017 USD ($) company	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)
Business Acquisition [Line Items]
Goodwill allocated		$ 1,719	$ 1,719
Number of merged companies | company	2
Infinia Technology Corporation (ITC)
Business Acquisition [Line Items]
Consideration transferred, excluding contingent consideration	$ 3,800
Goodwill allocated			$ 1,700

XML

Fair Value Measurements - Schedule of Assets and Liabilities Carried at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2017	Mar. 31, 2017
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Cash equivalents	$ 24,704	$ 32,589
Derivative liabilities	1,681	1,217
Reported value measurement | Quoted Prices in Active Markets (Level 1)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Cash equivalents	24,704	32,589
Reported value measurement | Significant Other Observable Inputs (Level 2)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Cash equivalents	0	0
Reported value measurement | Significant Unobservable Inputs (Level 3)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Cash equivalents	0	0
Warrants
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative liabilities	1,681	1,217	$ 998	$ 1,923
Warrants | Reported value measurement | Quoted Prices in Active Markets (Level 1)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative liabilities	0	0
Warrants | Reported value measurement | Significant Other Observable Inputs (Level 2)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative liabilities	0	0
Warrants | Reported value measurement | Significant Unobservable Inputs (Level 3)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative liabilities	$ 1,681	$ 1,217

XML

Fair Value Measurements - Schedule of Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 1,217
Ending balance	1,681
Warrants
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	1,217	$ 1,923
Mark to market adjustment	464	(925)
Ending balance	$ 1,681	$ 998

XML

Accounts Receivable - Schedule of Accounts Receivable (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Mar. 31, 2018
Receivables [Abstract]
Accounts receivable (billed)	$ 6,983	$ 4,403
Accounts receivable (unbilled)	4,603	3,016
Less: Allowance for doubtful accounts	(54)	(54)
Accounts receivable, net	$ 11,532	$ 7,365

XML

Inventory - Schedule of Inventory (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Mar. 31, 2018
Inventory Disclosure [Abstract]
Raw materials	$ 6,316	$ 7,526
Work-in-process	1,327	920
Finished goods	8,633	8,767
Deferred program costs	2,077	2,567
Net inventory	$ 18,353	$ 19,780

XML

Inventory - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Inventory Disclosure [Abstract]
Provision for excess and obsolete inventory	$ 144	$ 250

XML

Note Receivable - Additional Information (Details) $ in Thousands			3 Months Ended
	Mar. 28, 2018 USD ($)	Feb. 01, 2018 USD ($)	Jun. 30, 2018 USD ($) installment	Mar. 31, 2018 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Note receivable			$ 2,720	$ 2,559
Note receivable discount			280	336
Deferred gain on sale			$ 0	$ 105
64 Jackson LLC
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchase and sale agreement, total consideration	$ 23,000	$ 23,000
Security deposit		1,000
Note receivable	$ 6,000	$ 6,000
Number of installments | installment			2
Installment amount			$ 3,000
Interest rate	1.96%		1.96%
Notes receivable, present value			$ 5,700
Discount rate			6.00%
Note receivable discount			$ 300
Deferred gain on sale			$ 100

XML

Note Receivable - Schedule of Note Receivable (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Mar. 31, 2018
Current assets
Note receivable, current	$ 3,000	$ 3,000
Note receivable, current portion	3,000	3,000
Long term assets
Note receivable, long term	3,000	3,000
Note receivable discount	(280)	(336)
Deferred gain on sale	0	(105)
Note receivable	$ 2,720	$ 2,559

XML

Property, Plant and Equipment - Schedule of Costs and Accumulated Depreciation (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Mar. 31, 2018
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 76,516	$ 76,718
Less accumulated depreciation	(64,962)	(64,205)
Property, plant and equipment, net	11,554	12,513
Construction in progress - equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	528	654
Equipment and software
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	72,466	72,760
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	1,890	1,878
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 1,632	$ 1,426

XML

Property, Plant and Equipment - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Property, Plant and Equipment [Line Items]
Depreciation expense	$ 1.1	$ 4.2
Change inrevised estimate of remaining useful lives | Cost of goods sold
Property, Plant and Equipment [Line Items]
Depreciation expense		$ 2.5

XML

Accounts Payable and Accrued Expenses - Schedule of Accounts Payable and Accrued Expenses (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2017	Mar. 31, 2017
Payables and Accruals [Abstract]
Accounts payable	$ 3,863	$ 3,096
Accrued inventories in-transit	144	1,207
Accrued other miscellaneous expenses	1,999	2,412
Advanced deposits	2,729	0
Accrued compensation	4,348	3,605
Income taxes payable	309	536
Accrued warranty	1,752	1,769	$ 2,026	$ 2,344
Total	$ 15,144	$ 12,625

XML

Accounts Payable and Accrued Expenses - Additional Information (Detail)	3 Months Ended
	Jun. 30, 2018
Minimum
Product Warranty Liability [Line Items]
Warranty period	1 year
Maximum
Product Warranty Liability [Line Items]
Warranty period	2 years

XML

Accounts Payable and Accrued Expenses - Schedule of Product Warranty Activity (Detail) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Movement in Extended Product Warranty Accrual [Roll Forward]
Balance at beginning of period	$ 1,769	$ 2,344
Change in accruals for warranties during the period	104	41
Settlements during the period	(121)	(359)
Balance at end of period	$ 1,752	$ 2,026

XML

Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Income Tax Disclosure [Abstract]
Income tax (benefit) expense	$ (45)	$ 100

XML

Warrants and Derivative Liabilities - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended
	Dec. 19, 2014	Jun. 30, 2018	Jun. 30, 2017	Mar. 31, 2018	Nov. 13, 2014
Derivative [Line Items]
Change in fair value of warrants and contingent consideration		$ (464)	$ 925
November 2014 Warrant
Derivative [Line Items]
Warrants expiration date		Nov. 13, 2019
Common stock units offered (in shares)					909,090
Warrants to purchase one share of common stock (in shares)					0.9
Number of warrants issued to purchase common stock (in shares)					818,181
Sale of stock, price per share (in dollars per share)					$ 7.81
Change in fair value of warrants and contingent consideration		$ (500)	$ 900
Senior secured loan | Hercules Technology Growth Capital | First Warrant
Derivative [Line Items]
Number of shares received from warrants received to purchase common stock (in shares)		13,927
Senior secured loan | Hercules Technology Growth Capital | Second Warrant
Derivative [Line Items]
Number of shares received from warrants received to purchase common stock (in shares)		25,641
Senior secured loan | Hercules Technology Growth Capital | Hercules Warrants
Derivative [Line Items]
Number of shares received from warrants received to purchase common stock (in shares)	58,823
Warrant exercise price (in dollars per share)		$ 7.85
Warrants expiration date		Jun. 30, 2020
Warrant fair value		$ 100		$ 100

XML

Warrants and Derivative Liabilities - Schedule of Assumptions Used to Calculate the Fair Value of Exchanged Warrants (Detail) - November 2014 Warrant $ in Millions	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Sep. 30, 2017 USD ($)	Jun. 30, 2017 USD ($)
Derivative [Line Items]
Fair value	$ 1.6	$ 1.1	$ 0.4	$ 0.8	$ 0.9
Risk-free interest rate
Derivative [Line Items]
Measurement inputs	0.0240	0.0220	0.0187	0.0149	0.0144
Expected annual dividend yield
Derivative [Line Items]
Measurement inputs	0	0	0	0	0
Expected volatility
Derivative [Line Items]
Measurement inputs	0.6740	0.6586	0.6586	0.6564	0.6721
Term (years)
Derivative [Line Items]
Term (years)	1 year 4 months 13 days	1 year 7 months 13 days	1 year 10 months 13 days	2 years 1 month 13 days	2 years 4 months 13 days

XML

Stockholders' Equity - Additional Information (Detail) - USD ($)			1 Months Ended
	May 26, 2017	May 10, 2017	May 26, 2017	Jan. 27, 2017
Class of Stock [Line Items]
Proceeds from additional equity offering		$ 17,000,000	$ 17,000,000
Public stock offering
Class of Stock [Line Items]
Common stock, shares issued (in shares)		4,000,000
Sale of stock, price per share (in dollars per share)		$ 4.00
Proceeds from additional equity offering		$ 14,700,000
Over-allotment option
Class of Stock [Line Items]
Common stock, shares issued (in shares)		600,000
Proceeds from additional equity offering	$ 2,300,000
Over allotment common stock options period (in shares)		30 days
ATM issuance sales agreement
Class of Stock [Line Items]
Maximum value of shares for sale				$ 10,000,000.0

XML

Commitments and Contingencies - Additional Information (Detail) $ in Thousands	May 06, 2019 USD ($)	Jul. 04, 2018 USD ($)	Jul. 03, 2018 USD ($) installment	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)
Commitments And Contingencies [Line Items]
Restricted cash included in long-term assets				$ 165	$ 165
Subsequent Event | Sinovel Wind Group Co. Ltd.
Commitments And Contingencies [Line Items]
Proceeds from settlement			$ 57,500
Number of installments | installment			2
Settlement, amount awarded		$ 32,500
Payment period			10 months
Forecast | Sinovel Wind Group Co. Ltd.
Commitments And Contingencies [Line Items]
Settlement, amount awarded	$ 25,000

XML

Restructuring - Schedule of Charges and Payments (Details) - USD ($) $ in Thousands		3 Months Ended
	Apr. 04, 2017	Jun. 30, 2018	Jun. 30, 2017
Restructuring Cost and Reserve [Line Items]
Number of positions eliminated, period percent	8.00%
Restructuring Reserve [Roll Forward]
Accrued restructuring beginning balance		$ 435	$ 0
Charges to operations		310	1,339
Cash payments		(580)	(423)
Accrued restructuring ending balance		165	916
Employee Severance
Restructuring Reserve [Roll Forward]
Charges to operations		1,300
Severance pay and benefits
Restructuring Reserve [Roll Forward]
Accrued restructuring beginning balance		262	0
Charges to operations		0	1,339
Cash payments		(97)	(423)
Accrued restructuring ending balance		165	916
Facility Exit And Relocation Costs
Restructuring Cost and Reserve [Line Items]
Exit costs		300
Restructuring Reserve [Roll Forward]
Accrued restructuring beginning balance		173	0
Charges to operations		310	0
Cash payments		(483)	0
Accrued restructuring ending balance		$ 0	$ 0
Former executive officer | Severance pay and benefits
Restructuring Cost and Reserve [Line Items]
Period of post employment salary	18 months
Share multiplier, unpaid cash owed percentage		120.00%
Restructuring Reserve [Roll Forward]
Charges to operations		$ 500

XML

Business Segments - Additional Information (Detail) $ in Thousands	3 Months Ended		12 Months Ended
	Jun. 30, 2018 USD ($) segment MW	Jun. 30, 2017 USD ($)	Mar. 31, 2018 segment
Segment Reporting Information [Line Items]
Number of reportable business segments | segment	2		2,000
Stock-based compensation expense	$ 785	$ 754
Restructuring	310	1,339
Unallocated corporate expenses
Segment Reporting Information [Line Items]
Stock-based compensation expense	800	800
Restructuring	$ 300	$ 1,300
Minimum
Segment Reporting Information [Line Items]
Megawatts of drive trains and power ratings | MW	2

XML

Business Segments - Operating Results for Two Business Segments (Detail) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Segment Reporting Information [Line Items]
Revenues	$ 12,607	$ 8,923
Operating loss	(5,128)	(14,693)
Unallocated corporate expenses
Segment Reporting Information [Line Items]
Operating loss	(1,095)	(2,093)
Wind
Segment Reporting Information [Line Items]
Revenues	3,678	2,278
Wind | Operating Segments
Segment Reporting Information [Line Items]
Operating loss	(1,367)	(4,433)
Grid
Segment Reporting Information [Line Items]
Revenues	8,929	6,645
Grid | Operating Segments
Segment Reporting Information [Line Items]
Operating loss	$ (2,666)	$ (8,167)

XML

Business Segments - Total Business Segments Assets (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Mar. 31, 2018
Segment Reporting Asset Reconciling Item [Line Items]
Total assets	$ 84,446	$ 88,175
Operating Segments | Wind
Segment Reporting Asset Reconciling Item [Line Items]
Total assets	14,830	16,790
Operating Segments | Grid
Segment Reporting Asset Reconciling Item [Line Items]
Total assets	42,701	37,012
Corporate assets
Segment Reporting Asset Reconciling Item [Line Items]
Total assets	$ 26,915	$ 34,373

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Recent Accounting Pronouncements - Narrative (Details) $ in Millions	Mar. 31, 2018 USD ($)
Accounting Standards Update 2017-05
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Adjustment to retained earnings	$ 0.1