10-Q

UNITEDSTATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 10-Q

(Mark One)

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

For the quarterly period ended September 30, 2017

or

☐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: 001-15957

Capstone Turbine Corporation

(Exact name of registrant as specified in its charter)

Delaware	95-4180883
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)
21211 Nordhoff Street, Chatsworth, California (Address of principal executive offices)	91311 (Zip Code)

818-734-5300

(Registrant’s telephone number, including area code)

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

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

Large accelerated filer ☐	Accelerated filer ☐	Non‑accelerated filer ☐	Smaller reporting company ☒
Emerging growth company ☐		(Do not check if a smaller reporting 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 ☒

The number of shares outstanding of the registrant’s common stock as of October 27, 2017 was 46,742,619.

CAPSTONE TURBINE CORPORATION

INDEX

		Page Number
PART I — FINANCIAL INFORMATION
Item 1.	Financial Statements (Unaudited)	3
	Condensed Consolidated Balance Sheets as of September 30, 2017 and March 31, 2017	3
	Condensed Consolidated Statements of Operations for the Three and Six Months Ended September  30, 2017 and 2016	4
	Condensed Consolidated Statements of Cash Flows for the Six Months Ended September  30, 2017 and 2016	5
	Notes to Condensed Consolidated Financial Statements	6
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	24
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	39
Item 4.	Controls and Procedures	39
PART II — OTHER INFORMATION
Item 1.	Legal Proceedings	39
Item 1A.	Risk Factors	41
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	42
Item 3.	Defaults Upon Senior Securities	42
Item 4.	Mine Safety Disclosures	42
Item 5.	Other Information	42
Item 6.	Exhibits	42
Signatures		44

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PART I — FINANCIAL INFORMATION

Item 1.  Financial Statements

CAPSTONE TURBINE CORPORATION AND SUBSIDIARIES

CONDENSED CONSOLIDATED BALANCE SHEETS

(In thousands, except share amounts)

(Unaudited)

	September 30,		March 31,
	2017		2017
Assets
Current Assets:
Cash and cash equivalents	$	10,156	$	14,191
Restricted cash		5,000		5,514
Accounts receivable, net of allowances of $6,773 at September 30, 2017 and $6,845 at March 31, 2017		13,248		17,003
Inventories		16,274		14,538
Prepaid expenses and other current assets		2,545		3,073
Total current assets		47,223		54,319
Property, plant and equipment, net		2,232		2,115
Non-current portion of inventories		994		961
Intangible assets, net		523		651
Other assets		331		225
Total assets	$	51,303	$	58,271
Liabilities and Stockholders’ Equity
Current Liabilities:
Accounts payable and accrued expenses	$	14,096	$	14,719
Accrued salaries and wages		1,834		1,819
Accrued warranty reserve		2,562		3,766
Deferred revenue		4,999		5,050
Revolving credit facility		9,575		11,533
Current portion of notes payable and capital lease obligations		14		302
Total current liabilities		33,080		37,189
Long-term portion of notes payable and capital lease obligations		20		26
Other long-term liabilities		136		158
Total liabilities		33,236		37,373
Commitments and contingencies (Note 15)
Stockholders’ Equity:
Preferred stock, $.001 par value; 10,000,000 shares authorized; none issued		—		—
Common stock, $.001 par value; 515,000,000 shares authorized, 44,959,744 shares issued and 44,813,869 shares outstanding at September 30, 2017; 38,920,174 shares issued and 38,803,630 shares outstanding at March 31, 2017		45		39
Additional paid-in capital		879,639		874,697
Accumulated deficit		(859,959)		(852,199)
Treasury stock, at cost; 145,875 shares at September 30, 2017 and 116,544 shares at March 31, 2017		(1,658)		(1,639)
Total stockholders’ equity		18,067		20,898
Total liabilities and stockholders' equity	$	51,303	$	58,271

See accompanying notes to condensed consolidated financial statements.

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CAPSTONE TURBINE CORPORATION AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(In thousands, except per share data)
(Unaudited)

	Three Months Ended				Six Months Ended
	September 30,				September 30,
	2017		2016		2017		2016
Revenue:
Product, accessories and parts	$	16,005	$	11,518	$	31,496	$	27,301
Service		3,769		3,480		7,518		6,762
Total revenue		19,774		14,998		39,014		34,063
Cost of goods sold:
Product, accessories and parts		13,549		11,341		27,586		24,978
Service		3,209		2,987		6,173		5,416
Total cost of goods sold		16,758		14,328		33,759		30,394
Gross margin		3,016		670		5,255		3,669
Operating expenses:
Research and development		1,139		1,350		2,288		2,972
Selling, general and administrative		4,796		5,036		9,757		10,782
Total operating expenses		5,935		6,386		12,045		13,754
Loss from operations		(2,919)		(5,716)		(6,790)		(10,085)
Other income (expense)		14		(27)		4		(43)
Interest income		—		7		9		12
Interest expense		(98)		(129)		(319)		(263)
Change in warrant valuation		(657)		—		(657)		—
Loss before income taxes		(3,660)		(5,865)		(7,753)		(10,379)
Provision for income taxes		7		—		7		3
Net loss	$	(3,667)	$	(5,865)	$	(7,760)	$	(10,382)
Net loss per common share—basic and diluted	$	(0.09)	$	(0.19)	$	(0.18)	$	(0.36)
Weighted average shares used to calculate basic and diluted net loss per common share		42,941		30,498		42,606		28,843

See accompanying notes to condensed consolidated financial statements.

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CAPSTONE TURBINE CORPORATION AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(In thousands)

(Unaudited)

	Six Months Ended
	September 30,
	2017		2016
Cash Flows from Operating Activities:
Net loss	$	(7,760)	$	(10,382)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization		583		802
Amortization of deferred financing costs		133		86
Reduction in accounts receivable allowances		(22)		(1,396)
Inventory provision		590		483
Provision for warranty expenses		995		775
Loss on disposal of equipment		26		170
Stock-based compensation		307		479
Change in warrant valuation		657		—
Changes in operating assets and liabilities:
Accounts receivable		3,778		2,221
Inventories		(2,360)		(1,442)
Prepaid expenses and other current assets		266		322
Accounts payable and accrued expenses		(790)		(1,156)
Accrued salaries and wages and long term liabilities		(7)		(55)
Accrued warranty reserve		(2,199)		(1,087)
Deferred revenue		(49)		153
Net cash used in operating activities		(5,852)		(10,027)
Cash Flows from Investing Activities:
Expenditures for property and equipment		(521)		(84)
Net cash used in investing activities		(521)		(84)
Cash Flows from Financing Activities:
Net repayments of revolving credit facility		(1,958)		(3,281)
Repayment of notes payable and capital lease obligations		(183)		(298)
Cash used in employee stock-based transactions		(22)		(17)
Net proceeds from issuance of common stock and warrants		3,987		13,113
Net cash provided by financing activities		1,824		9,517
Net decrease in Cash, Cash Equivalents and Restricted Cash		(4,549)		(594)
Cash, Cash Equivalents and Restricted Cash, Beginning of Period		19,705		16,706
Cash, Cash Equivalents and Restricted Cash, End of Period	$	15,156	$	16,112
Supplemental Disclosures of Cash Flow Information:
Cash paid during the period for:
Interest	$	205	$	87
Income taxes	$	7	$	—
Supplemental Disclosures of Non-Cash Information:
Acquisition of property and equipment through accounts payable	$	99	$	27

See accompanying notes to condensed consolidated financial statements.

5

CAPSTONE TURBINE CORPORATION AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

1.  Business and Organization

Capstone Turbine Corporation (the “Company”) develops, manufactures, markets and services microturbine technology solutions for use in stationary distributed power generation applications, including cogeneration (combined heat and power (“CHP”), integrated combined heat and power (“ICHP”), and combined cooling, heat and power (“CCHP”)), renewable energy, natural resources, critical power supply, transportation and marine. In addition, the Company’s microturbines can be used as battery charging generators for hybrid electric vehicle applications. The Company was organized in 1988 and has been commercially producing its microturbine generators since 1998.

2.  Basis of Presentation

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“generally accepted accounting principles” or “GAAP”) for interim financial information and the instructions to Form 10-Q and Regulation S-X promulgated under the Securities Exchange Act of 1934, as amended (the “Exchange Act”). They do not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements. The condensed consolidated balance sheet at March 31, 2017 was derived from audited financial statements included in the Company’s Annual Report on Form 10-K for the year ended March 31, 2017. In the opinion of management, the interim condensed consolidated financial statements include all adjustments (including normal recurring adjustments) necessary for a fair presentation of the financial condition, results of operations and cash flows for such periods. Results of operations for any interim period are not necessarily indicative of results for any other interim period or for the full year. These condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the year ended March 31, 2017. This Quarterly Report on Form 10-Q (this “Form 10-Q”) refers to the Company’s fiscal years ending March 31 as its “Fiscal” years.

Evaluation of Ability to Maintain Current Level of Operations In connection with preparing the consolidated financial statements for the second quarter of Fiscal 2018, management evaluated whether there were conditions and events, considered in the aggregate, that raised substantial doubt about the Company’s ability to meet its obligations as they became due for the next twelve months from the date of issuance of its second quarter of Fiscal 2018 financial statements. Management assessed that there were such conditions and events, including a history of recurring operating losses, negative cash flows from operating activities, the continued negative impact caused by the volatility of the global oil and gas markets, a strong U.S. dollar (making our products more expensive overseas) and ongoing geopolitical tensions in Russia, North Africa and the Middle East. Cash used for working capital during the second quarter of Fiscal 2018 was higher than planned, primarily as a result of higher finished goods inventory. Additionally, the Company did not fully achieve its planned number of product shipments during the second quarter of Fiscal 2018, resulting in lower than expected revenue. The Company incurred a net loss of $3.7 million and used cash in operating activities of $5.1 million for the second quarter of Fiscal 2018.  As of September 30, 2017, the Company had cash, cash equivalents and restricted cash of $15.2 million, and outstanding borrowings under its credit facility of $9.6 million.

Management evaluated these conditions in relation to the Company’s ability to meet its obligations as they become due. The Company’s ability to continue current operations and to execute on management’s plans is dependent on its ability to generate cash flows from operations. Management believes that the Company will continue to make progress on its path to profitability by continuing to lower its operating costs and to develop its geographical and vertical markets.  The Company may seek to raise funds by selling additional securities (through the at-the-market offering or otherwise) to the public or to selected investors or by obtaining additional debt financing. There is no assurance that the Company will be able to obtain additional funds on commercially favorable terms or at all. If the Company raises additional funds by issuing additional equity or convertible debt securities, the fully diluted ownership percentages of existing stockholders will be reduced. In addition, any equity or debt securities that the Company would issue may have rights, preferences or privileges senior to those of the holders of its common stock. 

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On June 2, 2017, the Company, entered into two secured credit facilities (the “Bridge Bank Credit Agreements”) with Western Alliance Bank through its Bridge Bank division (“Bridge Bank”), with credit support provided by the Export-Import Bank of the United States through its working capital guarantee program. Under the terms of the Bridge Bank Credit Agreements, the Company may borrow up to $12.0 million on a revolving basis depending on, among other factors, the amount of its eligible inventory and accounts receivable. The Bridge Bank Credit Agreements are for a two-year period ending June 2, 2019. See Note 11—Revolving Credit Facility, for discussion of the credit facilities with Bridge Bank.

The Company maintained two Credit and Security Agreements, with Wells Fargo Bank, National Association (“Wells Fargo”), which provided the Company with a credit facility up to $20.0 million in the aggregate. Upon closing with Bridge Bank, the Company’s existing credit facilities with Wells Fargo, were paid off in full.

Based on the Company’s current operating plan, management anticipates that, given current working capital levels, current financial projections, the ability to borrow under its credit facility with Bridge Bank, net proceeds from exercise of Series A warrants and the funds expected to be received from the new oil and gas sector distributor in Russia, the Company will be able to meet its financial obligations as they become due over the next twelve months from the date of issuance of its second quarter of Fiscal 2018 financial statements. See Note 17— Subsequent Events, for discussion with respect to the exercise of Series A warrants and new Russian distributor.

The consolidated financial statements include the accounts of the Company, Capstone Turbine International, Inc., its wholly owned subsidiary that was formed in June 2004 and Capstone Turbine Financial Services, LLC, its wholly owned subsidiary that was formed in October 2015, after elimination of inter-company transactions.

3.  Recently Issued Accounting Standards

In July 2017, the Financial Accounting Standards Board (“FASB”) issued a two-part Accounting Standards Update (“ASU”) No. 2017-11, I. Accounting for Certain Financial Instruments With Down Round Features and II. Replacement of the Indefinite Deferral for Mandatorily Redeemable Financial Instruments of Certain Nonpublic Entities and Certain Mandatorily Redeemable Noncontrolling Interests With a Scope Exception (“ASU 2017-11”). ASU 2017-11 amends guidance in FASB ASC 260, Earnings Per Share, FASB ASC 480, Distinguishing Liabilities from Equity, and FASB ASC 815, Derivatives and Hedging. The amendments in Part I of ASU 2017-11 change the classification analysis of certain equity-linked financial instruments (or embedded features) with down round features. The amendments in Part II of ASU 2017-11 re-characterize the indefinite deferral of certain provisions of Topic 480 that now are presented as pending content in the Codification, to a scope exception. Those amendments do not have an accounting effect. ASU 2017-11 is effective for public business entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. Early adoption is permitted. The Company adopted ASU 2017-11 for the three months ended June 30, 2017, and retrospectively applied ASU 2017-11 as required. See Note 10—Fair Value Measurements for further discussion on changes as a result of the adoption of ASU 2017-11.

In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842), (“ASU 2016-02”). The purpose of ASU 2016-02 is to provide financial statement users a better understanding of the amount, timing, and uncertainty of cash flows arising from leases. The adoption of ASU 2016-02 will result in the recognition of a right-of-use asset and a lease liability for most operating leases. New disclosure requirements include qualitative and quantitative information about the amounts recorded in the financial statements. In September 2017, the FASB issued ASU 2017-13, Revenue Recognition (Topic 605), Revenue from Contracts with Customers (Topic 606), Leases (Topic 840), and Leases (Topic 842), which provides additional implementation guidance on the previously issued ASU 2016-02 Leases (Topic 842). ASU 2016-02 requires a lessee to recognize assets and liabilities on the balance sheet for leases with lease terms greater than 12 months. ASU 2016-02 is effective for fiscal years beginning after December 15, 2018. ASU 2016-02 requires a modified retrospective transition by means of a cumulative-effect adjustment to retained earnings as of the beginning of the fiscal year in which the guidance is effective with the option to elect certain practical expedients. Early adoption is permitted. The Company is currently evaluating the impact of ASU 2016-02 on its consolidated financial position and results of operations.

In July 2015, the FASB issued ASU 2015-11, Simplifying the Measurement of Inventory (“ASU 2015-11”). ASU 2015-11 requires inventory that is recorded using the first-in, first-out method to be measured at the lower of cost or net realizable value. ASU 2015-11 is effective for annual and interim periods beginning after December 15, 2016, and

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should be applied prospectively with early adoption permitted at the beginning of an interim or annual reporting period. The Company adopted ASU 2015-11 with no impact on its consolidated financial position or results of operations.

Revenue Recognition Related ASUs:

In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (“ASU 2014-09”). ASU 2014-09 supersedes nearly all existing revenue recognition guidance under GAAP. The standard’s core principle is that a company will recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services.

In August 2015, the FASB issued FASB ASU No. 2015-14, Revenue from Contracts with Customers: Deferral of the Effective Date (“ASU 2014-09”), which deferred the effective date of ASU 2014-09 by one year. ASU 2014-09 is now effective for annual reporting periods beginning after December 15, 2017, including interim periods within that reporting period, using one of two retrospective application methods. Early application is permitted only as of annual reporting periods beginning after December 15, 2016, including interim reporting periods within that reporting period.

In March 2016, the FASB issued FASB ASU No. 2016-08, Revenue from Contracts with Customers: Principal versus Agent Considerations (“ASU 2016-08”). ASU 2016-08 clarifies the implementation guidance on principal versus agent considerations.

In April 2016, the FASB issued ASU No. 2016-10, Revenue from Contracts with Customers: Identifying Performance Obligations and Licensing (“ASU 2016-10”). ASU 2016-10 clarifies the implementation guidance for identifying performance obligations and determining when to recognize revenue on licensing agreements for intellectual property.

In May 2016, the FASB issued ASU No. 2016-11, Revenue Recognition and Derivatives and Hedging: Rescission of SEC Guidance Because of ASU 2014-09 and ASU 2014-16 Pursuant to Staff Announcements at the March 3, 2016 EITF Meeting (“ASU 2016-11”). ASU 2016-11 rescinds certain SEC staff comments previously made in regard to these ASU’s.

In May 2016, the FASB issued ASU No. 2016-12, Revenue from Contracts with Customers: Narrow-Scope Improvements and Practical Expedients (“ASU 2016-12”) that provide guidance on assessing collectability, presentation of sales taxes, noncash consideration, and completed contracts and contract modifications at transition.

In December 2016, the FASB issued ASU 2016-20, Technical Corrections and Improvements to ASU 2014-09. The amendments in ASU 2014-09 affect narrow aspects of the guidance in ASU 2014-09, which is not yet effective. The amendments in ASU 2014-09 address loan guarantee fees, impairment testing of contract costs, provisions for losses on construction-type and production-type contracts, and various disclosures.

In September 2017, the FASB issued ASU 2017-13, “Revenue Recognition (Topic 605), Revenue from Contracts with Customers (Topic 606), Leases (Topic 840), and Leases (Topic 842): Amendments to SEC Paragraphs Pursuant to the Staff Announcement at the July 20, 2017 EITF Meeting and Rescission of Prior SEC Staff Announcements and Observer Comments”(“ASU 2017-13”) The amendments in ASU 2017-13 amends the early adoption date option for certain companies related to the adoption of ASU 2014-09 and ASU 2016-02.

The Company is evaluating its existing revenue recognition policies and the impact of ASU 2014-09, ASU 2015-14, ASU 2016-08, ASU 2016- 10, ASU 2016-11, ASU 2016-12 and ASU 2016-20, if any, on its financial position and results of operations. The effective date and transition requirements for the amendments are the same as the effective date and transition requirements for ASU 2014-09. The Company will be required to adopt the revenue recognition standard in annual reporting periods beginning after December 15, 2017 (fiscal year ending March 31, 2019) and interim periods within those annual periods.

4.  Customer Concentrations and Accounts Receivable

Sales to Reliable Secure Power Systems, (“RSP”), Regatta Solutions, Inc. (“Regatta”) and E-Finity Distributed Generation, LLC (“E-Finity”), three of the Company’s domestic distributors, and Optimal Group Australia Pty Ltd, one of the Company’s Australian distributors and IBT Europe GmbH (“IBT”), one of the Company’s European distributors,

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accounted for 12%, 11%, 11%, 11% and 10%, respectively, of revenue for the three months ended September 30, 2017. Sales to BPC Engineering (“BPC”), one of the Company’s Russian distributors, accounted for 11% of revenue for the three months ended September 30, 2016. For the six months ended September 30, 2017, E-Finity, Horizon Power Systems (“Horizon”) and Optimal accounted for 13%, 12% and 10% of revenue, respectively. For the six months ended September 30, 2016, Regatta Solutions, Inc. (“Regatta”), one of the Company’s domestic distributors, accounted for 11% of revenue.

Additionally, E-Finity, RSP, Regatta and IBT accounted for 16%, 16%, 13% and 11%, respectively, of net accounts receivable as of September 30, 2017. E-Finity, Dtc Soluciones Inmobiliarias S.A. de C.V. (“DTC”), one of the Company’s Mexican distributors and RSP accounted for 29%, 12% and 10%, respectively, of net accounts receivable as of March 31, 2017.

The Company recorded a net bad debt recovery of approximately $9,000 and $22,000 during the three and six months ended September 30, 2017, respectively. As of September 30, 2017, the Company collected approximately $1.7 million from BPC on their accounts receivable allowance of approximately $8.1 million. The Company recorded net bad debt recovery of approximately $0.5 million for the three months ended September 30, 2016. During the six months ended September 30, 2016, the Company recorded approximately $1.4 million in net bad debt recovery, which was previously reserved during Fiscal 2015, for cash received primarily from BPC and Electro Mecanique Industries, one of the Company’s distributors in the Middle East and Africa.

5.  Inventories

Inventories are valued on a first in first out (“FIFO”) basis and lower of cost or net realizable value and consisted of the following as of September 30, 2017 and March 31, 2017 (in thousands):

	September 30,		March 31,
	2017		2017
Raw materials	$	14,436	$	15,035
Work in process		290		—
Finished goods		2,542		464
Total		17,268		15,499
Less non-current portion		(994)		(961)
Current portion	$	16,274	$	14,538

The non-current portion of inventories represents the portion of the inventories in excess of amounts expected to be sold or used in the next twelve months. The non-current inventories are primarily comprised of repair parts for older generation products that are still in operation but are not technologically compatible with current configurations. The weighted average age of the non-current portion of inventories on hand as of September 30, 2017 is 1.6 years. The Company expects to use the non-current portion of the inventories on hand as of September 30, 2017 over the periods presented in the following table (in thousands):

		Non-current Inventory
		Balance Expected
Expected Period of Use		to be Used
13 to 24 months	$	358
25 to 36 months		636
Total	$	994

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6.  Property, Plant and Equipment

Property, plant and equipment consisted of the following as of September 30, 2017 and March 31, 2017 (in thousands):

	September 30,		March 31,
	2017		2017
Machinery, rental equipment, equipment, automobiles and furniture	$	16,050	$	17,657
Leasehold improvements		9,828		9,870
Molds and tooling		2,929		2,866
		28,807		30,393
Less, accumulated depreciation		(26,575)		(28,278)
Total property, plant and equipment, net	$	2,232	$	2,115

Depreciation expense for property and equipment was $0.2 million and $0.4 million for the three and six months ended September 30, 2017, respectively. The Company recorded depreciation expense of $0.3 million and $0.6 million for the three and six months ended September 30, 2016, respectively.

7.  Intangible Assets

Intangible assets consisted of the following as of September 30, 2017 and March 31, 2017 (in thousands):

	September 30, 2017
	Weighted
	Average	Intangible
	Amortization	Assets,		Accumulated		Intangible
	Period	Gross		Amortization		Assets, Net
Manufacturing license	17 years	$	3,700	$	3,700	$	—
Technology	10 years		2,240		1,717		523
Trade name & parts, service and TA100 customer relationships	1.2 to 5 years		1,766		1,766		—
Total		$	7,706	$	7,183	$	523

	March 31, 2017
	Weighted
	Average	Intangible
	Amortization	Assets,		Accumulated		Intangible
	Period	Gross		Amortization		Assets, Net
Manufacturing license	17 years	$	3,700	$	3,684	$	16
Technology	10 years		2,240		1,605		635
Trade name & parts, service and TA100 customer relationships	1.2 to 5 years		1,766		1,766		—
Total		$	7,706	$	7,055	$	651

Amortization expense for the intangible assets was $0.1 million for each of the three and six months ended September 30, 2017 and 2016, respectively.

Expected future amortization expense of intangible assets as of September 30, 2017 is as follows (in thousands):

	Amortization
Year Ending March 31,	Expense
2018 (remainder of fiscal year)		112
2019		224
2020		187
Thereafter		—
Total expected future amortization	$	523

The manufacturing license provides the Company with the ability to manufacture recuperator cores previously purchased from Solar Turbines Incorporated (“Solar”). The Company is required to pay a per-unit royalty fee over a seventeen-year period for cores manufactured and sold by the Company using the technology. Royalties of

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approximately $7,200 and $6,400 were earned by Solar for the three months ended September 30, 2017 and 2016, respectively. Royalties of approximately $13,700 and $14,700 were earned by Solar for the six months ended September 30, 2017 and 2016, respectively. Earned royalties of approximately $7,200 and $10,000 were unpaid as of September 30, 2017 and March 31, 2017, respectively, and are included in accounts payable and accrued expenses in the accompanying balance sheets.

8.  Stock-Based Compensation

The following table summarizes, by statement of operations line item, stock-based compensation expense for the Company’s three and six months ended September 30, 2017 and 2016 (in thousands):

	Three Months Ended				Six Months Ended
	September 30,				September 30,
	2017		2016		2017		2016
Cost of goods sold	$	18	$	14	$	38	$	29
Research and development		5		13		12		16
Selling, general and administrative		130		214		257		434
Stock-based compensation expense	$	153	$	241	$	307	$	479

Stock Plans

2000 Equity Incentive Plan and 2017 Equity Incentive Plan

In June 2000, the Company adopted the 2000 Equity Incentive Plan (the “2000 Plan”). The 2000 Plan provides for a total maximum aggregate number of shares which may be issued of 1,849,000 shares. In June 2017, the Company adopted the Capstone Turbine Corporation 2017 Equity Incentive Plan (the “2017 Plan”) which was approved by the stockholders at the Company’s 2017 annual meeting of stockholders on August 31, 2017. The 2017 Plan provides for awards of up to 3,000,000 shares of common stock. The 2017 Plan is administered by the Compensation Committee designated by the Board of Directors (the “Compensation Committee”). The Compensation Committee’s authority includes determining the number of incentive awards and vesting provisions.

Stock Options

The Company issued stock options under the 2000 Plan and issues stock options under the 2017 Plan to employees, non-employee directors and consultants that vest and become exercisable over a four-year period and expire 10 years after the grant date. The Company uses a Black-Scholes valuation model to estimate the fair value of the options at the grant date, and compensation cost is recorded on a straight-line basis over the vesting period. During the year ended March 31, 2017, the Company established an accounting policy election to assume zero forfeiture for stock options and account for forfeitures when they occur. All options are subject to the following vesting provisions: one-fourth vest one year after the issuance date and 1/48th vest on the first day of each full month thereafter, so that all options will be vested on the first day of the 48th month after the grant date. Information relating to stock options for the Company’s six months ended September 30, 2017 is as follows:

				Weighted-
				Average
		Weighted-		Remaining	Aggregate
		Average		Contractual	Intrinsic
	Shares	Exercise Price		Term	Value
				(in years)
Options outstanding at March 31, 2017	314,537	$	15.48
Granted	—	$	—
Exercised	—	$	—
Forfeited, cancelled or expired	(4,000)	$	24.25
Options outstanding at September 30, 2017	310,537	$	15.37	4.9		—
Options fully vested at September 30, 2017 and those expected to vest beyond September 30, 2017	310,537	$	15.37	4.9		—
Options exercisable at September 30, 2017	245,693	$	18.98	3.9		—

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Black-Scholes Model Valuation Assumptions

There were no stock options granted during either the three or six months ended September 30, 2017. The Company calculated the estimated fair value of each stock option granted during the three and six months ended September 30, 2016 on the date of grant using the Black-Scholes option-pricing model and the following weighted-average assumptions:

	Three and Six Months Ended
	September 30, 2016
Risk-free interest rates		1.3	%
Expected lives (in years)		5.7
Dividend yield		—	%
Expected volatility		133.9	%
Weighted average grant date fair value of options granted during the period	$	1.52

The Company’s computation of expected volatility for the three and six months ended September 30, 2016 was based on historical volatility. The expected life, or term, of options granted is derived from historical exercise behavior and represents the period of time that stock option awards are expected to be outstanding. Management has selected a risk-free rate based on the implied yield available on U.S. Treasury Securities with a maturity equivalent to the options’ expected term.  The Company recorded expense of approximately $8,000 and $3,000 associated with its stock options during the three months ended September 30, 2017 and 2016, respectively. The Company recorded expense of approximately $17,000 and $3,000 associated with its stock options during the six months ended September 30, 2017 and 2016, respectively. As of September 30, 2017, there was approximately $0.1 million of total compensation cost related to unvested stock option awards that is expected to be recognized as expense over a weighted average period of 2.9 years.

Restricted Stock Units and Performance Restricted Stock Units

The Company issued restricted stock units under the 2000 Plan and issues restricted stock units under the 2017 Plan to employees, non-employee directors and consultants. The restricted stock units are valued based on the closing price of the Company’s common stock on the date of issuance, and compensation cost is recorded on a straight-line basis over the vesting period. During the fiscal year ended March 31, 2017, the Company established an accounting policy election to assume zero forfeiture for restricted stock units and account for forfeitures when they occur. The restricted stock units vest in equal installments over a period of four years. For restricted stock units with four year vesting, one-fourth vest annually beginning one year after the issuance date. The restricted stock units issued to non-employee directors vest one year after the issuance date. The following table outlines the restricted stock unit and performance restricted stock unit (“PRSU”) activity:

		Weighted
		Average Grant
		Date Fair
Restricted Stock and Performance Restricted Stock Units	Shares	Value
Nonvested restricted stock units outstanding at March 31, 2017	316,709	$	2.85
Granted	474,848		0.64
Vested and issued	(212,924)		2.76
Forfeited	(9,513)		2.49
Nonvested restricted stock units outstanding at September 30, 2017	569,120		1.05
Restricted stock units expected to vest beyond September 30, 2017	569,097	$	1.05

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The following table provides additional information on restricted stock units for the three and six months ended September 30, 2017 and 2016:

	Three Months Ended				Six Months Ended
	September 30,				September 30,
	2017		2016		2017		2016
Restricted stock compensation expense (in thousands)	$	144	$	188	$	287	$	375
Aggregate fair value of restricted stock units vested and issued (in thousands)	$	130	$	85	$	137	$	107
Weighted average grant date fair value of restricted stock units granted during the period	$	0.62	$	1.71	$	0.67	$	1.71

As of September 30, 2017, there was approximately $0.5 million of total compensation cost related to unvested restricted stock units that is expected to be recognized as expense over a weighted average period of 1.2 years.

Restricted Stock Awards

The Company issued restricted stock awards under the 2000 Plan and issues restricted stock awards under the 2017 Plan to employees and non-employee directors. During the three and six months ended September 30, 2017 and 2016 the Company granted stock awards to non-employee directors who elected to take payment of all or any part of the directors’ fees in stock in lieu of cash. The following table outlines the restricted stock award activity for the three and six months ended September 30, 2017 and 2016:

	Three Months Ended				Six Months Ended
	September 30,				September 30,
	2017		2016		2017		2016
Restricted stock awards compensation expense (in thousands)	$	1	$	50	$	3	$	101
Restricted stock awards granted		1,953		29,910		3,969		62,111
Weighted average grant date fair value of restricted stock awards granted during the period	$	0.64	$	1.69	$	0.63	$	1.63

For each term of the Board of Directors (beginning on the date of an annual meeting of stockholders and ending on the date immediately preceding the next annual meeting of stockholders), a non-employee director may elect to receive a stock award in lieu of all or any portion of their annual retainer or committee fee cash payment. The shares of stock were valued based on the closing price of the Company’s common stock on the date of grant.

Employee Stock Purchase Plan

In June 2000, the Company adopted the Employee Stock Purchase Plan (the “ESPP”). The ESPP provides for the granting of rights to purchase common stock to regular full and part-time employees or officers of the Company and its subsidiaries. In June 2017, the Board of Directors unanimously approved an amendment and restatement to the ESPP which was approved by the stockholders at the Company’s annual meeting of stockholders on August 31, 2017. Prior to the current amendment, 70,000 shares of the Company’s common stock had been reserved for issuance. As amended, the ESPP will continue by its terms and will increase the number of shares of the Company’s common stock available by 500,000 shares which will reserve for issuance a total of 570,000 shares of common stock. Under the ESPP, shares of the Company’s common stock will be issued upon exercise of the purchase rights. The ESPP will continue by its terms through June 30, 2020, unless terminated sooner.

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Grants outside of 2000 Plan and 2017 Plan

As of September 30, 2017, the Company had outstanding 88,930 non-qualified common stock options and 11,115 restricted stock units issued outside of the 2017 Plan. The Company granted these stock options and restricted stock units during the three months ended September 30, 2016 as inducement grants to the new Vice President, Manufacturing of the Company, with exercise prices or values, as applicable, based on the fair market value of the Company’s common stock on the grant date.

Although the options and restricted stock units were not granted under the 2000 Plan and 2017 Plan, they are governed by terms and conditions identical to those under the 2000 Plan and 2017 Plan. All options are subject to the following vesting provisions: one-fourth vest one year after the issuance date and 1/48th vest on the first day of each full month thereafter, so that all options will be vested on the first day of the 48th month after the grant date. All outstanding options have a contractual term of ten years. The restricted stock units vest in equal installments over a period of four years.

Stockholder Rights Plan

On May 6, 2016, the Company entered into Amendment No. 5 (the “Amendment”) to the Rights Agreement, dated as of July 7, 2005, as amended by Amendment No. 1, dated as of July 3, 2008, Amendment No. 2, dated as of June 9, 2011, Amendment No. 3, dated as of July 1, 2014 and Amendment No. 4, dated as of August 5, 2014, (the “Original Rights Agreement”) between the Company and Computershare Inc. 

The Amendment accelerated the expiration of the Company’s preferred share purchase rights (the “Original Rights”) from 5:00 p.m., California time, on the 30th day after the Company’s 2017 annual meeting of stockholders to 5:00 p.m., California time, on May 6, 2016, and had the effect of terminating the Original Rights Agreement on that date. At the time of the termination of the Original Rights Agreement, all of the Original Rights distributed to holders of the Company’s common stock pursuant to the Original Rights Agreement expired.

On May 6, 2016, the Company entered into a rights agreement (the “NOL Rights Agreement”) with Computershare Inc., as rights agent. In connection with the NOL Rights Agreement, the Company’s Board of Directors authorized and declared a dividend distribution of one preferred stock purchase right (a “New Right”) for each share of the Company’s common stock authorized and outstanding. Each New Right entitles the registered holder to purchase from the Company a unit consisting of one one-thousandth of a share of Series B Junior Participating Preferred Stock, par value $0.001 per share, at a purchase price of $8.76 per unit, subject to adjustment. The description and terms of the New Rights are set forth in the NOL Rights Agreement.

The purpose of the NOL Rights Agreement is to diminish the risk that the Company’s ability to use its net operating losses and certain other tax assets (collectively, “Tax Benefits”) to reduce potential future federal income tax obligations would become subject to limitations by reason of the Company’s experiencing an “ownership change,” as defined in Section 382 of the Internal Revenue Code of 1986. A company generally experiences such an ownership change if the percentage of its stock owned by its “5-percent shareholders,” as defined in Section 382 of the Internal Revenue Code of 1986, increases by more than 50 percentage points over a rolling three-year period. The NOL Rights Agreement is designed to reduce the likelihood that the Company will experience an ownership change under Section 382 of the Internal Revenue Code of 1986 by (i) discouraging any person or group from becoming a 4.99% shareholder and (ii) discouraging any existing 4.99% shareholder from acquiring additional shares of the Company’s stock.

The New Rights will not be exercisable until the earlier to occur of (i) the close of business on the tenth business day after a public announcement or filing that a person has, or group of affiliated or associated persons or persons acting in concert have, become an “Acquiring Person,” which is defined as a person or group of affiliated or associated persons or persons acting in concert who, at any time after the date of the NOL Rights Agreement, have acquired, or obtained the right to acquire, beneficial ownership of 4.99% or more of the Company’s outstanding shares of common stock, subject to certain exceptions or (ii) the close of business on the tenth business day after the commencement of, or announcement of an intention to commence, a tender offer or exchange offer the consummation of which would result in any person becoming an Acquiring Person (the earlier of such dates being called the “Distribution Date”). Certain synthetic interests in securities created by derivative positions, whether or not such interests are considered to be ownership of the underlying common stock or are reportable for purposes of Regulation 13D of the Exchange Act, are treated as beneficial ownership of the number of shares of common stock equivalent to the economic

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exposure created by the derivative position, to the extent actual shares of the common stock are directly or indirectly held by counterparties to the derivatives contracts.

The New Rights, which are not exercisable until the Distribution Date, will expire prior to the earliest of (i) May 6, 2019 or such later day as may be established by the Board of Directors prior to the expiration of the New Rights, provided that the extension is submitted to the Company’s stockholders for ratification at the next annual meeting of stockholders of the Company succeeding such extension; (ii) the time at which the New Rights are redeemed pursuant to the NOL Rights Agreement; (iii) the time at which the New Rights are exchanged pursuant to the NOL Rights Agreement; (iv) the time at which the New Rights are terminated upon the occurrence of certain transactions; (v) the close of business on the first day after the Company’s 2017 annual meeting of stockholders, if approval by the stockholders of the Company of the NOL Rights Agreement has not been obtained on or prior to the close of business on the first day after the Company’s 2017 annual meeting of stockholders; (vi) the close of business on the effective date of the repeal of Section 382 of the Internal Revenue Code of 1986, if the Board of Directors determines that the NOL Rights Agreement is no longer necessary or desirable for the preservation of Tax Benefits; and (vii) the close of business on the first day of a taxable year of the Company to which the Board of Directors determines that no Tax Benefits are available to be carried forward.

Each share of Series B Junior Participating Preferred Stock will be entitled, when, as and if declared, to a preferential per share quarterly dividend payment equal to the greater of (i) $1.00 per share or (ii) an amount equal to 1,000 times the dividend declared per share of common stock. Each share of Series B Junior Participating Preferred Stock will entitle the holder thereof to 1,000 votes on all matters submitted to a vote of the stockholders of the Company. In the event of any merger, consolidation or other transaction in which shares of common stock are converted or exchanged, each share of Series B Junior Participating Preferred Stock will be entitled to receive 1,000 times the amount received per one share of common stock.

At the Company’s 2017 annual meeting of stockholders on August 31, 2017, the stockholders approved the NOL Rights Agreement, dated as of May 6, 2016, with Computershare Inc.

9.   Offerings of Common Stock and Warrants and At-the-Market Offering Program

On October 18, 2016, the Company entered into a securities purchase agreement with certain accredited investors, pursuant to which the Company agreed to sell 3.6 million shares of common stock, pre-funded Series B warrants to purchase up to 2.7 million shares of common stock, and Series A warrants to purchase up to 6.3 million shares of common stock. Pursuant to a placement agent agreement, dated as of October 18, 2016, the Company engaged Oppenheimer & Co. Inc. as the lead placement agent for the offering and ROTH Capital Partners, LLC as co-placement agent for the offering. Each share of common stock was sold at a price of $1.20. Each Series B warrant was issued with an exercise price of $1.20 per share of common stock, $1.19 of which was pre-funded at closing and $0.01 of which is payable upon exercise. Each Series A warrant was issued with an initial exercise price of $1.34 per share of common stock. These Series A warrants contain anti-dilution provisions that reduce the exercise price of the warrants if certain dilutive issuances occur. The anti-dilution provisions of the Series A warrants were approved by the Company’s stockholders at the 2017 annual meeting of stockholders held on August 31, 2017 and exercise price of the warrants was adjusted to $0.65 per share. The value of this down round feature was measured using the Binomial valuation model and resulted in a loss of approximately $0.7 million during the three and six months ended September 30, 2017, respectively. The net proceeds to the Company from this offering, after deducting the placement agent fees and other estimated offering expenses, were approximately $6.8 million. The offering closed on October 21, 2016.

On April 19, 2016, the Company entered into an underwriting agreement with Oppenheimer & Co. Inc. as the sole book-running manager, and Rodman & Renshaw, a unit of H.C. Wainwright & Co., LLC, as the co-manager, related to the public offering of 2.7 million shares of our common stock and pre-funded Series B warrants to purchase up to 5.5 million shares of common stock, which were offered in lieu of common stock to those purchasers whose purchase of common stock in the offering otherwise would result in the purchaser beneficially owning more than 4.99% of the Company’s outstanding common stock following the completion of the offering. Also included in the offering were Series A warrants to purchase 4.1 million shares of common stock. Every two shares of common stock were sold with one Series A warrant to purchase one share of common stock at a collective negotiated price of $3.50. Every two Series B warrants were sold with one Series A warrant to purchase one share of common stock at a collective negotiated price of $3.48. The Series A warrants are exercisable, subject to certain limitations, during the period commencing six months

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after the date of the issuance and expire five years after the first day they are exercisable. The pre-funded Series B warrants were exercisable, subject to certain limitations, upon issuance and expire nine months from the date of issuance, subject to extension under certain circumstances. The net proceeds to the Company from the sale of the common stock and warrants, after deducting fees and other offering expenses, were approximately $13.1 million. The offering closed on April 22, 2016. 

During each of the three and six months ended September 30, 2017, there was no Series A warrant activity and 10,407,500 Series A warrants remained outstanding. During the Fiscal year ended March 31, 2017, all Series B warrants were exercised and there are no Series B warrants outstanding.

Effective August 28, 2015, the Company entered into a sales agreement with respect to an at-the-market offering program pursuant to which the Company may offer and sell, from time to time at its sole discretion, shares of its common stock, having an aggregate offering price of up to $30.0 million. The Company will set the parameters for sales of the shares, including the number to be sold, the time period during which sales are requested to be made, any limitation on the number that may be sold in one trading day and any minimum price below which sales may not be made. During the three months ended September 30, 2017, the Company issued 2.4 million shares of the Company’s common stock under the at-the-market offering program and the net proceeds to the Company from the sale of the Company’s common stock were approximately $1.4 million after deducting commissions paid of approximately $45,000. During the six months ended September 30, 2017, the Company issued 5.8 million shares of the Company’s common stock under the at-the-market offering program and the net proceeds to the Company from the sale of the Company’s common stock were approximately $4.0 million after deducting commissions paid of approximately $0.1 million. As of September 30, 2017, 13.1 million shares of the Company’s common stock were sold pursuant to the at-the-market offering program and the net proceeds to the Company from the sale of the common stock were approximately $16.8 million after deducting commissions paid of approximately $0.5 million. As of September 30, 2017, approximately $12.2 million remained available for issuance with respect to the at-the-market offering program. These available proceeds are subject to Instruction I.B.6(a) to Form S-3 often referred to as the “Baby Shelf Rules.”

10.  Fair Value Measurements

The FASB has established a framework for measuring fair value using generally accepted accounting principles. That framework provides a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (level 1 measurements) and the lowest priority to unobservable inputs (level 3 measurements). The three levels of the fair value hierarchy are described as follows:

Level 1.  Inputs to the valuation methodology are unadjusted quoted prices for identical assets or liabilities in active markets.

Level 2.  Inputs to the valuation methodology include:

· Quoted prices for similar assets or liabilities in active markets

· Quoted prices for identical or similar assets or liabilities in inactive markets

· Inputs other than quoted prices that are observable for the asset or liability

· Inputs that are derived principally from or corroborated by observable market data by correlation or other means

If the asset or liability has a specified (contractual) term, the level 2 input must be observable for substantially the full term of the asset or liability.

Level 3.  Inputs to the valuation methodology are unobservable and significant to the fair value measurement.

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The asset or liability’s fair value measurement level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement. Valuation techniques used must maximize the use of observable inputs and minimize the use of unobservable inputs.

The table below presents our assets and liabilities that are measured at fair value on a recurring basis at September 30, 2017 and are categorized using the fair value hierarchy (in thousands):

	Fair Value Measurements at September 30, 2017
			Quoted Prices in		Significant Other		Significant
			Active Markets for		Observable		Unobservable
			Identical Assets		Inputs		Inputs
	Total		(Level 1)		(Level 2)		(Level 3)
Restricted cash	$	5,000	$	5,000	$	—	$	—

The table below presents our assets and liabilities that are measured at fair value on a recurring basis during the fiscal year ended March 31, 2017 and are categorized using the fair value hierarchy (in thousands):

	Fair Value Measurements at March 31, 2017
			Quoted Prices in		Significant Other		Significant
			Active Markets for		Observable		Unobservable
			Identical Assets		Inputs		Inputs
	Total		(Level 1)		(Level 2)		(Level 3)
Cash equivalents	$	7,520	$	7,520	$	—	$	—
Restricted cash	$	5,514	$	5,514	$	—	$	—

Cash equivalents include cash held in money market and U.S. treasury funds at March 31, 2017.

Basis for Valuation

The carrying values reported in the consolidated balance sheets for cash and cash equivalents, restricted cash, accounts receivable and accounts payable approximate fair values because of the immediate or short-term maturities of these financial instruments. As the Company's obligations under the Credit Facility are based on adjustable market rates reflective of what would currently be available to the Company, the Company has determined that the carrying value approximates the fair value. The carrying values and estimated fair values of these obligations are as follows (in thousands):

	As of				As of
	September 30, 2017				March 31, 2017
	Carrying		Estimated		Carrying		Estimated
	Value		Fair Value		Value		Fair Value
Obligations under the credit facility	$	9,575	$	9,575	$	11,533	$	11,533

Adoption of ASU 2017-11

The Company changed its method of accounting for warrants through the early adoption of ASU 2017-11 during the three months ended June 30, 2017 on a full retrospective basis. Accordingly, the Company reclassified the warrant liability to additional paid in capital on its March 31, 2017 consolidated balance sheets, which increased additional paid-in capital by $2.9 million and decreased warrant liability by $2.9 million. In addition, because of the retrospective adoption, the Company credited change in fair value of warrant liability on its consolidated statements of operations by $0.5 million and $1.3 million for the three months and year ended March 31, 2017, respectively. The change in unrealized gain/loss on warrant liability was offset by a $1.3 million credit to accumulated deficit on the consolidated balance sheets. Adoption of ASU 2017-11 had no impact on the Company’s consolidated statement of cash flows in the current or previous interim and annual reporting periods. The adoption of ASU 2017-11 also had no impact on statement of operations during the six months ended September 30, 2016 and no cumulative effect to the accumulated deficit as of the beginning of the prior annual reporting period, as there were no warrants outstanding in those respective periods that were impacted by ASU 2017-11. The following table provides a reconciliation of warrant liability,

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additional paid-in capital, accumulated deficit and change in fair value of warrant liability on the consolidated balance sheets for the year ended March 31, 2017 (in thousands):

	Consolidated Balance Sheets
	Warrant Liability		Additional Paid-in Capital		Accumulated deficit
Balance, March 31, 2017 (Prior to adoption of ASU 2017-11)	$	2,917	$	870,457	$	(850,876)
Reclassified warrant liability	$	(4,240)	$	4,240	$	—
Reclassified unrealized gain on warrant liability	$	1,323	$	—	$	(1,323)
Balance, March 31, 2017 (After adoption of ASU 2017-11)	$	—	$	874,697	$	(852,199)

11.  Revolving Credit Facility

Former Credit Facility  The Company maintained two Credit and Security Agreements, as amended, with Wells Fargo, which provided the Company with a line of credit of up to $20.0 million in the aggregate. As of September 30, 2016 and March 31, 2017, $6.2 million and $11.5 million in borrowings were outstanding, respectively, under the former credit facility. Interest expense related to the former credit facility during the six months ended September 30, 2017 was $0.2 million, which includes $0.1 million in amortization of deferred financing costs. Interest expense related to the former credit facility during the three months ended September 30, 2016 was $0.1 million, which includes $42,000 in amortization of deferred financing costs. Interest expense related to the former credit facility during the six months ended September 30, 2016 was $0.3 million, which includes $0.1 million in amortization of deferred financing costs. The Company’s borrowing rate was 4.9% at March 31, 2017. Upon closing the Bridge Bank Credit Agreements with Bridge Bank the Company’s existing credit facilities with Wells Fargo were paid off in full.

New Credit Facility   On June 2, 2017, the Company entered into the Bridge Bank Credit Agreements with Western Alliance Bank through Bridge Bank, with credit support provided by the Export-Import Bank of the United States through its working capital guarantee program. Under the terms of the Bridge Bank Credit Agreements, the Company may borrow up to $12.0 million on a revolving basis depending on, among other factors, the amount of its eligible inventory and accounts receivable. The Bridge Bank Credit Agreements are for a two-year period ending June 2, 2019.

Total borrowings, letter of credit obligations and the then aggregate committed amount of cash management services under the Bridge Bank Credit Agreements may not exceed 85% of the sum of unrestricted cash and the amount of cash collateral held at Bridge Bank. As a condition of the Bridge Bank Credit Agreements, the Company has restricted $5.0 million of cash equivalents as additional security for the credit facility. Borrowings under the Bridge Bank Credit Agreements will bear per annum interest at the prime rate plus 1.5 percent, subject to increase during the occurrence of an event of default. Obligations under the Bridge Bank Credit Agreements are secured by all of the Company’s assets, including intellectual property and general intangibles. The Company has incurred $0.2 million in origination fees. These fees has been recorded under the caption “Prepaid expenses and other current assets” in the accompanying condensed consolidated balance sheets and amortized to interest expense through June 2019. As of September 30, 2017, $9.6 million in borrowings were outstanding under the new credit facility. Interest expense related to the new credit facility during the three months ended September 30, 2017 was $0.1 million, which includes $28,000 in amortization of deferred financing costs. Interest expense related to the new credit facility during the six months ended September 30, 2017 was $0.2 million, which includes $46,000 in amortization of deferred financing costs. The Company’s borrowing rate was 5.8% at September 30, 2017.

The Bridge Bank Credit Agreements include affirmative covenants as well as negative covenants that prohibit a variety of actions without Bridge Bank’s consent, including covenants that limit the Company’s ability to (a) incur or guarantee debt, (b) create liens, (c) enter into any merger, recapitalization or similar transaction or purchase all or substantially all of the assets or stock of another entity, or (d) sell, assign, transfer or otherwise dispose of the Company’s assets. 

The financial covenants of the domestic credit agreement with Bridge Bank (the “Domestic Facility”), which is included in the Bridge Bank Credit Agreements, requires the Company not to exceed specified levels of losses relative to its financial model and the outstanding line of credit advances may not exceed 85% of  the sum of unrestricted cash and the amount of cash collateral held at Bridge Bank. The Domestic Facility also defines an event of default to include a material adverse effect on the Company’s business. An event of default for this or any other reason, if not waived, could

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have a material adverse effect on the Company. As of September 30, 2017 we were in compliance with the covenants contained in the Bridge Bank Credit Agreements for Fiscal 2018. 

12.  Accrued Warranty Reserve

The Company provides for the estimated costs of warranties at the time revenue is recognized. The specific terms and conditions of those warranties vary depending upon the microturbine product sold and geography of sale.  The Company’s product warranties generally start from the delivery date and continue for up to eighteen months. Factors that affect the Company’s warranty obligation include product failure rates, anticipated hours of product operations and costs of repair or replacement in correcting product failures. These factors are estimates that may change based on new information that becomes available each period. Similarly, the Company also accrues the estimated costs to address reliability repairs on products no longer in warranty when, in the Company’s judgment, and in accordance with a specific plan developed by the Company, it is prudent to provide such repairs. The Company assesses the adequacy of recorded warranty liabilities quarterly and makes adjustments to the liability as necessary. When the Company has sufficient evidence that product changes are altering the historical failure occurrence rates, the impact of such changes is then taken into account in estimating future warranty liabilities. During the three months ended December 31, 2016, the Company recorded a one-time non-cash warranty provision of approximately $5.2 million to retrofit proactively select non-Signature Series C200 microturbines with the more robust new Signature Series generator components to improve product performance and reliability. The balance of this reliability repair program liability as of September 30, 2017 was $0.7 million. Changes in accrued warranty reserve during the six months ended September 30, 2017 are as follows (in thousands):

Balance, beginning of the period	$	3,766
Standard warranty provision		1,190
Net accrual related to reliability repair programs		(195)
Deductions for warranty claims		(2,199)
Balance, end of the period	$	2,562

13.  Deferred Revenue

As of March 31, 2017 the balance of deferred revenue was approximately $5.0 million. The change in deferred revenue attributed to Comprehensive Factory Protection Plan (“FPP”) contracts during the six months ended September 30, 2017 was a decrease of $0.1 million and the change in deferred revenue attributed to deposits during the six months ended September 30, 2017 was an increase of $0.1 million. Changes in deferred revenue during the six months ended September 30, 2017 are as follows (in thousands):

FPP Balance, beginning of the period	$	3,414
FPP Billings		7,164
FPP Revenue recognized		(7,309)
Balance attributed to FPP contracts		3,269
Deposits		1,730
Deferred revenue balance, end of the period	$	4,999

Deferred revenue attributed to FPP contracts represents the unearned portion of the billed agreements. FPP agreements are generally paid quarterly in advance with revenue recognized on a straight line basis over the contract period. Deposits are primarily non-refundable cash payments from distributors for orders to be delivered in the future.

14.  Other Current Liabilities

The Company is a party to a Development and License Agreement with Carrier Corporation (“Carrier”) regarding the payment of royalties on the sale of each of the Company’s 200 kilowatt (“C200”) microturbines. Carrier earned $0.2 million and $0.1 million in royalties for C200 and C1000 Series system sales during the three months ended September 30, 2017 and 2016, respectively. Carrier earned $0.5 million and $0.3 million in royalties for C200 and C1000 system sales during the six months ended September 30, 2017 and 2016, respectively. Earned royalties of approximately $0.2 million and $0.3 million were unpaid as of September 30, 2017 and March 31, 2017, respectively, and are included in accrued expenses in the accompanying balance sheets.

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15.  Commitments and Contingencies

Purchase Commitments

As of September 30, 2017, the Company had firm commitments to purchase inventories of approximately $23.3 million through Fiscal 2019. Certain inventory delivery dates and related payments are not firmly scheduled; therefore, amounts under these firm purchase commitments will be payable upon the receipt of the related inventories.

Lease Commitments

The Company leases offices and manufacturing facilities under various non-cancelable operating leases expiring at various times through the fiscal year ending March 31, 2020. All of the leases require the Company to pay maintenance, insurance and property taxes. The lease agreements for primary office and manufacturing facilities provide for rent escalation over the lease term and renewal options for five-year periods. Rent expense is recognized on a straight-line basis over the term of the lease. The difference between rent expense recorded and the amount paid is credited or charged to deferred rent, which is included in other long-term liabilities in the accompanying balance sheets. The balance of deferred rent was approximately $0.1 million and $0.2 million as of September 30, 2017 and March 31, 2017, respectively. Rent expense was approximately $0.6 million during each of the three months ended September 30, 2017 and 2016. Rent expense was approximately $1.1 million and $1.2 million during the six months ended September 30, 2017 and 2016, respectively.

On June 7, 2017 the Company and Prologis, L.P entered into a Fourth Amendment to Lease (the “Van Nuys Fourth Amendment”) to amend the Lease by extending the term of the Lease for a period of sixty-two (62) months commencing on December 31, 2017 to February 28, 2023. The Van Nuys Fourth Amendment also adjusts the monthly base rent payable by the Company under the Lease Agreement to the following: $0 per month from January 1, 2018 through February 28, 2018; $66,846 per month from March 1, 2018 through December 31, 2018; $68,852 per month from January 1, 2019 through December 31, 2019; $70,917 per month from January 1, 2020 through December 31, 2020; $73,045 per month from January 1, 2021 through December 31, 2021; $75,236 per month from January 1, 2022 through December 31, 2022; and $77,493 per month from January 1, 2023 through February 28, 2023. The Van Nuys Fourth Amendment also provides the Company with an option to extend the Lease by an additional five-year term following the expiration of the term of the Lease as amended by the Lease Amendment and provides that Prologis, L.P. will contribute a tenant improvement allowance toward the Company’s approved alterations to the premises.

Other Commitments

The Company has agreements with certain of its distributors requiring that if the Company renders parts obsolete in inventories the distributors own and hold in support of their obligations to serve fielded microturbines, then the Company is required to replace the affected stock at no cost to the distributors. While the Company has never incurred costs or obligations for these types of replacements, it is possible that future changes in the Company’s product technology could result and yield costs to the Company if significant amounts of inventory are held at distributors. As of September 30, 2017, no significant inventories were held at distributors.

Legal Matters

Federal Securities Class Action

Two putative securities class action complaints were filed against the Company and certain of its current and former officers in the United States District Court for the Central District of California under the following captions:  David Kinney, etc. v. Capstone Turbine, et al., No. 2:15-CV-08914 on November 16, 2015 (the “Kinney Complaint”) and Kevin M. Grooms, etc. v. Capstone Turbine, et al., No. 2:15-CV-09155 on December 18, 2015 (the “Grooms Complaint”).

The putative class in the Kinney Complaint is comprised of all purchasers of the Company’s securities between November 7, 2013 and November 5, 2015.  The Kinney Complaint alleges material misrepresentations and omissions in public statements regarding BPC and the likelihood that BPC would not be able to fulfill many legal and financial obligations to the Company.  The Kinney Complaint also alleges that the Company’s financial statements were not

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appropriately adjusted in light of this situation and were not maintained in accordance with GAAP, and that the Company lacked adequate internal controls over accounting.  The Kinney Complaint alleges that these public statements and accounting irregularities constituted violations by all named defendants of Section 10(b) of the Exchange Act, and Rule 10b-5 thereunder, as well as violations of Section 20(a) of the Exchange Act by the individual defendants.  The Grooms Complaint makes allegations and claims that are substantially identical to those in the Kinney Complaint, and both complaints seek compensatory damages of an undisclosed amount.  On January 16, 2016, several shareholders filed motions to consolidate the Kinney and Grooms actions and for appointment as lead plaintiff.  On February 29, 2016, the Court granted the motions to consolidate, and appointed a lead plaintiff.  On May 6, 2016, a Consolidated Amended Complaint with allegations and claims substantially identical to those of the Kinney Complaint was filed in the consolidated action.  The putative class period in the Consolidated Amended Complaint is June 12, 2014 to November 5, 2015.  Defendants filed a motion to dismiss the Consolidated Amended Complaint on June 17, 2016. On March 10, 2017, the Court issued an order granting Defendants’ motion to dismiss in its entirety with leave to amend. Plaintiffs filed an amended complaint on April 28, 2017. Defendants’ motion to dismiss was filed June 2, 2017. Plaintiffs filed their opposition to the motion to dismiss on July 7, 2017, and Defendants filed their reply in support of the motion to dismiss on July 28, 2017. The court vacated the hearing that was scheduled for August 18, 2017. The Company has not recorded any liability as of September 30, 2017 since any potential loss is not probable or reasonably estimable given the preliminary nature of the proceedings.

State Derivative Lawsuits — California

On February 18, 2016, a purported shareholder derivative action was filed in Los Angeles Superior Court in the State of California against the Company and certain of its current and former officers and directors under the following caption:  Stesiak v. Jamison, et al., No. BC610782.  The lawsuit alleges that certain of the Company’s current and former officers and directors knew or should have known that BPC would be unable to fulfill its obligations to the Company, but allowed the Company to make false and misleading statements regarding BPC and the Company’s financial condition.  The complaint also alleges that the defendants failed to timely adjust the Company’s account receivables and backlog to reflect BPC’s inability to pay the Company.  The complaint asserts causes of action for breach of fiduciary duty and unjust enrichment.  It demands damages for the amount of damage sustained by the Company as a result of the individual defendants’ alleged breach of fiduciary duties and unjust enrichment, that the Company institute corporate governance reforms, and disgorgement from the individual defendants.  On May 5, 2016, the parties filed a stipulation and proposed order seeking to stay this action until such time as the defendants’ motion(s) to dismiss the federal securities class action are either granted with prejudice or denied in whole or in part.  On May 10, 2016, the Court entered that proposed order. Given that the federal securities class action was dismissed with leave to amend, this case is still stayed. A status conference is scheduled for January 2, 2018.

On June 8, 2016, a purported shareholder derivative action entitled Velma Kilpatrick v. Simon, et al., No. BC623167, was filed in Los Angeles Superior Court in the State of California against the Company and certain of its current and former officers and directors.  The complaint alleges that certain of the Company’s current and former officers and directors knew or should have known that BPC would be unable to fulfill its obligations to the Company, but allowed the Company to make false and misleading statements regarding BPC and the Company’s financial condition.  The complaint also alleges that the defendants failed to timely adjust the Company’s account receivables and backlog to reflect BPC’s inability to pay the Company.  The complaint asserts causes of action for breach of fiduciary duty.  It demands damages for the amount of damage sustained by the Company as a result of the individual defendants’ alleged breach of fiduciary duties, and that the Company institute corporate governance reforms. On August 23, 2016, the parties filed a stipulation and proposed order seeking to stay this action until such time as the defendants’ motion(s) to dismiss the federal securities class action are either granted with prejudice or denied in whole or in part.  Given that the federal securities class action was dismissed with leave to amend, this case is still stayed. A status conference is scheduled for December 1, 2017.

On December 27, 2016, a purported shareholder derivative action entitled Andre Rosowsky v. Jamison, et al., No. 30-2016-00894859-CU-MC-CJC was filed in Orange County Superior Court in the State of California against the Company and certain of its current and former officers and directors. The complaint alleges that certain of the Company’s current and former officers and directors knew or should have known that BPC would be unable to fulfill its obligations to the Company, but allowed the Company to make false and misleading statements regarding BPC and the Company’s financial condition.  The complaint also alleges that the defendants failed to timely adjust the Company’s account receivables and backlog to reflect BPC’s inability to pay the Company.  The complaint asserts causes of action for breach of fiduciary duty and unjust enrichment.  It demands damages for the amount of damage sustained by the

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Company as a result of the individual defendants’ alleged breach of fiduciary duties, that the Company institute corporate governance reforms, and restitution from the individual defendants. On April 14, 2017, the case was removed to the United States District Court for the Central District of California. On May 5, 2017, the plaintiff voluntarily dismissed his complaint without prejudice.

Federal Derivative Lawsuits

On March 7, 2016, a purported shareholder derivative action was filed in the United States District Court for the Central District of California against the Company and certain of its current and former officers and directors under the following caption:  Haber v. Jamison, et al., No. CV16-01569-DMG (RAOx).  The lawsuit alleges that certain of the Company’s current and former officers and directors knew or should have known that BPC would be unable to fulfill its obligations to the Company, but allowed the Company to make false and misleading statements regarding BPC and the Company’s financial condition.  The complaint asserts a cause of action for breach of fiduciary duty.  It demands damages for the amount of damage sustained by the Company as a result of the individual defendants’ alleged breach of fiduciary duties, and equitable relief, including that the Company institute appropriate corporate governance reforms.  On May 11, 2016, the parties filed a stipulation and proposed order seeking to stay this action until such time as the defendants’ motion(s) to dismiss the federal securities class action are either granted with prejudice or denied in whole or in part. On May 13, 2016, the Court entered that proposed order.  Given that the federal securities class action was dismissed with leave to amend, this case is still stayed.

On July 12, 2016 and July 18, 2016, respectively, two additional purported shareholder derivative actions were filed in the United States District Court for the Central District of California against the Company and certain of its current and former officers and directors, under the caption Tuttle v. Atkinson, et al., No. CV16-05127, and Boll v. Jamison, et al., No. CV16-5282, respectively.  The lawsuits allege that certain of the Company’s current and former officers and directors knew or should have known that BPC would be unable to fulfill its obligations to the Company, but allowed the Company to make false and misleading statements regarding BPC and the Company’s financial condition.  The Tuttle complaint asserts causes of action for breach of fiduciary duty, gross mismanagement, and unjust enrichment, and the Boll complaint asserts causes of action for breach of fiduciary duty, unjust enrichment, abuse of control, gross mismanagement, and waste of corporate assets.  Both complaints demand damages sustained by the Company as a result of the individual defendants’ alleged breaches of fiduciary duties, and equitable relief, including that the Company institute appropriate corporate governance reforms. The federal derivative actions have been stayed until such time as the defendants’ motion(s) to dismiss the federal securities class action are either granted with prejudice or denied in whole or in part. Given that the federal securities class action was dismissed with leave to amend, these cases are still stayed.

Shareholder Demand

Following the dismissal without prejudice of his purported shareholder derivative action discussed above, former plaintiff in Andre Rosowsky v. Jamison, et al. sent us a letter dated July 7, 2017 (the “Shareholder Demand”) demanding that the Board of Directors take action to remedy purported breaches of fiduciary duties allegedly related to the claims asserted in the above-discussed securities class action and derivative actions. The Company acknowledged the Shareholder Demand on July 25, 2017. The Company’s Board of Directors has formed a committee to evaluate the Shareholder Demand.

16.  Net Loss Per Common Share

Basic loss per share of common stock is computed using the weighted average number of common shares outstanding for the period. Diluted loss per share is computed without consideration to potentially dilutive instruments because the Company incurred losses in the three months ended September 30, 2017 which would make these instruments anti-dilutive. As of September 30, 2017 and 2016, the number of anti-dilutive stock options and restricted stock units excluded from diluted net loss per common share computations was approximately 0.9 million and 0.8 million, respectively. As of September 30, 2017 and 2016, the number of warrants excluded from diluted net loss per common share computations was approximately 10.4 million and 5.5 million, respectively.

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17. Subsequent Events

On October 26, 2017, the Company entered into a Warrant Exercise Agreement (the “Exercise Agreement”) with a holder of the Series A warrants (the “Exercising Holder”), which Exercising Holder owns Series A warrants exercisable for 1,928,750 shares of Common Stock. Pursuant to the Exercise Agreement, the Exercising Holder and the Company agreed that the Exercising Holder would exercise its Series A warrants with respect to 1,928,750 shares of Common Stock underlying such Series A warrants for a reduced exercise price equal to $0.90 per share. On October 27, 2017, the Company received net proceeds of approximately $1.7 million from the exercise of the Series A warrants by the Exercising Holder. The Company did not pay any financial advisory fees in connection with the exercise of the Series A warrants by the Exercising Holder. In addition, the exercise resulted in the reduction of warrants to purchase common stock, par value $0.001 per share, of the Company by approximately 19% and was not dilutive to existing stockholders of the Company calculated on a fully diluted basis for outstanding warrants.

On October 18, 2017, the Company announced that it had granted Turbine International, LLC (“TI”) and its affiliate, MTE Service, the sole distribution rights for Capstone products and services in the Russian oil and gas sector in exchange for approximately $6.3 million in cash. In connection with the appointment of TI as the Company’s distributor in the Russian oil and gas sector, on October 13, 2017, the Company and TI entered into an Accounts Receivable Assignment Agreement (the “Accounts Receivable Agreement”) and Promissory Note (the “Promissory Note”). Pursuant to the terms of the Accounts Receivable Agreement, the Company assigned to IT its right, title and interest to receivables owed to the Company from the Company’s distributor BPC Engineering. As consideration for the assignment of the BPC receivable, TI will pay the Company $2.5 million in three payments by February 1, 2018. The first payment of $0.1 million was paid on September 13, 2017. Under the terms of the Promissory Note, TI agreed to pay the Company $3.8 million to be paid over a three-year period in 35 equal monthly installments starting in August 2018. On October 13, 2017, the Company and Hispania Petroleum, S.A. (the “Guarantor”), entered into a Guaranty Agreement (the “Guaranty Agreement”) whereby the Guarantor guarantees TI’s obligations under the Accounts Receivable Agreement and Promissory Note. MTE Service is a wholly owned subsidiary of Hispania Petroleum S.A.

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Item 2.  Management’s Discussion and Analysis of Financial Condition and Results of Operations

The following discussion should be read in conjunction with the condensed consolidated financial statements and notes included in this Form 10-Q and in our Annual Report on Form 10-K for the year ended March 31, 2017. When used in this Form 10-Q, and in the following discussion, the words “believes”, “anticipates”, “intends”, “expects” and similar expressions are intended to identify forward-looking statements. Such statements are subject to certain risks and uncertainties which could cause actual results to differ materially from those projected. These risks include those under Risk Factors in our Annual Report on Form 10-K for the year ended March 31, 2017 and in other reports we file with the SEC. Readers are cautioned not to place undue reliance on forward-looking statements, which speak only as of the date hereof. We assume no obligation to update any of the forward-looking statements contained herein after the filing of this Form 10-Q to conform such statements to actual results or changes in expectations except as may be required by law. All dollar amounts are approximate.

Overview

We are the market leader in microturbines based on the number of microturbines sold. Generally, power purchased from the electric utility grid is less costly than power produced by distributed generation technologies. Utilities may also charge fees to interconnect to their power grids. However, we can provide economic benefits to end users in instances where the waste heat from our microturbine has value (combined heat and power (“CHP”) and combined cooling, heat and power (“CCHP”)), where fuel costs are low (renewable energy/renewable fuels), where the costs of connecting to the grid may be high or impractical (such as remote power applications), where reliability and power quality are of critical importance, or in situations where peak shaving could be economically advantageous because of highly variable electricity prices. Because our microturbines can provide a reliable source of power and can operate on multiple fuel sources, we believe they offer a level of flexibility not currently offered by other technologies such as reciprocating engines.

We continue to execute on our three-pronged business profitability plan to reduce operating expenses; diversify and increase revenue; and improve gross margin. During the second quarter of Fiscal 2018 our net loss decreased by 37% to $3.7 million and our basic and diluted loss per share improved by 53% to $0.09 compared to $5.9 million and $0.19, respectively, in the same period of the previous year. The improvement in the net loss during the second quarter of Fiscal 2018 was primarily the result of an increase in revenue of approximately 32% and reduction of operating expenses of approximately 8% from the second quarter of Fiscal 2017. The improvement in the net loss per share during the second quarter of Fiscal 2018 was primarily the result of a decrease in the net loss and an increase in weighted average shares outstanding to 42.9 million for the second quarter of Fiscal 2018 from 30.5 million for the second quarter of Fiscal 2017. The first half of Fiscal 2018 was characterized by the growth in our total revenue and strengthening aftermarket business on substantially lower operating expense, compared to the first half of Fiscal 2017. Our revenue from the United States and Canadian geographic markets during the first half of Fiscal 2018, improved to approximately 50% of revenue compared to 32% of revenue the same period last year primarily because the energy efficiency vertical market continues to improve on our C1000 Signature Series. Our revenue continues to be negatively impacted by the volatility of the global oil and gas markets, a strong U.S. dollar (making our products more expensive overseas) and ongoing geopolitical tensions in Russia, North Africa and the Middle East.

Our products continue to gain interest in all six of the major vertical markets (energy efficiency, renewable energy, natural resources, critical power supply, transportation and marine). In the energy efficiency market, we continue to expand our market presence in hotels, office buildings, hospitals, retail and industrial applications globally. The renewable energy market is fueled by landfill gas, biodiesel, and biogas from sources such as food processing, agricultural waste and cow, pig and chicken manure. Our product sales in the oil and gas and other natural resources market is driven by our microturbines’ reliability, emissions profile and ease of installation. Given the volatility of the oil and gas market, however, we have refocused our business strategy to target projects within the energy efficiency and renewal energy markets. The actual shift to the energy efficiency market is reflected in the product shipments by vertical markets table on page 25. We have also seen increased interest in critical power supply applications as customers want solutions that can handle both primary and backup power.

We continue to focus on improving our products based on customer input, building brand awareness and new channels to market by developing a diversified network of strategic distribution partners. Our focus is on products and solutions that provide near term opportunities to drive repeatable business rather than discrete projects for niche markets. In addition, management closely monitors operating expenses and strives to improve manufacturing efficiencies while

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simultaneously lowering direct material costs and increasing average selling prices. The key drivers to our success are revenue growth, higher average selling prices, lower direct material costs, positive new order flow and reduced cash usage.

An overview of our direction, targets and key initiatives are as follows:

1. Focus on Vertical Markets Within the distributed generation markets that we serve, we focus on vertical markets that we identify as having the greatest near-term potential. In our primary products and applications (energy efficiency, renewable energy, natural resources, critical power supply, transportation and marine), we identify specific targeted vertical market segments. Within each of these segments, we identify what we believe to be the critical factors to success and base our plans on those factors. Given the volatility of the oil and gas market, we have refocused our business strategy to target projects within the energy efficiency and renewable energy markets.

The following table summarizes our product shipments by vertical markets:

	Three Months Ended		Six Months Ended
	September 30,		September 30,
	2017	2016	2017	2016
Energy efficiency	66%	81%	61%	61%
Natural resources	15%	8%	27%	31%
Renewable energy	19%	11%	12%	8%

Energy Efficiency—CHP/CCHP

Energy efficiency refers to the proper utilization of both electrical and thermal energies in the power production process. In such applications, our microturbines are able to maximize the availability of usable energy to provide a significant economic advantage to customers while reducing their on-site emissions. CHP and CCHP can improve site economics by capturing the waste heat created from a single combustion process to increase the efficiency of the total system, from approximately 30 percent to 80 percent or more. Compared with more traditional, independent generation sources, the increase in operational efficiency also reduces greenhouse gas emissions through the displacement of other separate systems, which can also reduce operating costs.

Natural Resources—Oil, Natural Gas, Shale Gas & Mining

Our microturbines are installed in the natural resource market for use in both onshore and offshore applications, including oil and gas exploration, production, and at compression and transmission sites as a highly efficient and reliable source of power.  In some cases, these oil and gas or mining operations have no electric utility grid and rely solely on power generated on-site. There are numerous locations, on a global scale, where the drilling, production, compression and transportation of natural resources and other extraction and production processes create fuel byproducts, which are traditionally burned or released into the atmosphere. Our microturbines can turn these fuel byproducts - flare gas or associated gas, into a useable fuel to provide prime power to these sites.

Renewable Energy

There is a growing transition to renewable energy sources and technologies happening on a global scale. Our microturbines run efficiently on renewable fuels such as methane and other biogases from landfills, wastewater treatment facilities and other small biogas applications like food processing plants, livestock farms and agricultural waste operations. Microturbines can burn these renewable fuels with minimal emissions, thereby, and in some cases, avoiding the imposition of penalties incurred for pollution while simultaneously producing electricity from this “free” fuel source for use at the site or in the surrounding areas. Our microturbines have demonstrated effectiveness in these smaller applications and may outperform conventional combustion engines in some situations, including when the gas contains a high amount of sulfur.

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Critical Power Supply

Because of the potentially catastrophic consequences of system failure, momentary or otherwise, certain high demand power users, including high technology, health care and information systems facilities require higher levels of reliability in their power generation service. To meet these customer requirements, traditional solutions utilize UPS to protect critical loads from power disturbances along with back-up diesel generators for extended outages. We offer an alternative solution that can both meet customer reliability requirements and reduce operating costs.

Transportation

Our technology also can be used in hybrid electric vehicle (“HEV”) applications. Our customers have applied our products in HEV applications such as transit buses and Class 7 and 8 work trucks. In these applications, the microturbine acts as an onboard battery charger to recharge the battery system as needed. The benefits of microturbine-powered HEV include extended range, fuel economy gains, quieter operation, reduced emissions and higher reliability when compared with traditional internal combustion engines. Internal combustion diesel engine manufacturers have been challenged for the last several years to develop technology improvements, prior to aftertreatment that reduce emissions to levels specified by the EPA and CARB 2007 and 2010 standards. Many manufacturers are incorporating aftertreatment that increases upfront equipment costs, vehicle weight and life cycle costs, which may reduce overall engine efficiency.

Marine

Our technology is also used in marine applications. Our customers have applied our products in the commercial vessel and luxury yacht market segments. The most feasible application for our marine products is for use as a ship auxiliary engine. In this application, the microturbines provide power to the vessel’s electrical loads and, in some cases, the vessel is able to utilize the exhaust energy to increase the overall efficiency of the application, thereby reducing overall fuel consumption and emissions. Another feasible application is similar to our HEV application where the vessel is driven by an electric propulsion system and the microturbine serves as an on board range extender.

Backlog

Net product orders were $5.8 million and $8.9 million for the three months ended September 30, 2017 and 2016, respectively. Ending backlog was $110.9 million at September 30, 2017 compared to $109.1 million at September 30, 2016. Book-to-bill ratio was 0.5:1 and 1.1:1 for the three months ended September 30, 2017 and 2016, respectively. Book-to-bill ratio is the ratio of new orders we received to units shipped and billed during a period.

A portion of our backlog is concentrated in the international oil and gas market which may impact the overall timing of shipments or the conversion of backlog to revenue. The timing of the backlog is based on the requirement date indicated by our customers. However, based on historical experience, management expects that a significant portion of our backlog may not be shipped within the next 18 months. Additionally, the timing of shipments is subject to change based on several variables (including customer deposits, payments, availability of credit and customer delivery schedule changes), most of which are not in our control and can affect the timing of our revenue. This includes the backlog related to BPC Engineering (“BPC”), one of our Russian distributors that may be negatively impacted by the new distributor for the Russian oil and gas market. As a result, management believes the book-to-bill ratio demonstrates the current demand for our products in the given period.

2. Sales and Distribution Channels  We seek out distributors that have business experience and capabilities to support our growth plans in our targeted markets. We have a total of 100 distributors and Original Equipment Manufacturers (“OEMs”). In the United States and Canada, we currently have 23 distributors and OEMs. Outside of the United States and Canada, we currently have 77 distributors and OEMs. We continue to refine the distribution channels to address our specific targeted markets.

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3. Service  We provide service primarily through our global distribution network. Together with our global distribution network we offer a comprehensive FPP for a fixed annual fee to perform regularly scheduled and unscheduled maintenance as needed. We provide factory and on-site training to certify all personnel that are allowed to perform service on our microturbines. FPPs are generally paid quarterly in advance. Our FPP backlog as of September 30, 2017 was $74.7 million, which represents the value of the contractual agreement for FPP services that has not been earned and extends through Fiscal 2031. Our FPP backlog as of September 30, 2016 was $72.7 million. Our FPP backlog as of March 31, 2017 was $77.1 million.

4. Product Robustness and Life Cycle Maintenance Costs  We continue to invest in enhancements that relate to high performance and high reliability. An important element of our continued innovation and product strategy is to focus on the engineering of our product hardware and electronics to make them work together more effectively and deliver improved microturbine performance, reliability and low maintenance cost to our customers.

5. New Product Development Our new product development is targeted specifically to meet the needs of our selected vertical markets. We expect that our existing product platforms, the C30, C65, C200 and C1000 Series microturbines, will be our foundational product lines for the foreseeable future. Our research and development project portfolio is centered on enhancing the features of these base products. More recently, due to our cost reduction efforts, our focus is on expanding the existing products, including the launch of our C1000 Signature Series microturbine in December 2015.

Our product development activities during Fiscal 2017 included new-patented fuel injector and certification of our C65 microturbine to applicable European Union medium voltage grid interconnection standards. In addition, we continued our development in our C200S ICHP microturbine and overall cost reduction for our Signature Series. We developed a new-patented multi-staged lean pre-vaporizing, pre-mixing fuel injector providing ultra-low emissions that meet EPA Tier 4 requirements for power generation. Under this new program, exhaust emissions from these engines will be required to decrease by more than 90%. Our C65, C200 and C1000 Series microturbines became VDE, BDEW and CEI certified during Fiscal 2017. These new standards were attained following the development and implementation of new microturbine system software architecture. The C200S microturbine incorporates numerous system and design upgrades intended to improve overall product quality, reliability, and performance. Our new C200S ICHP product further supports our effort to diversify our business into the CHP and CCHP energy efficiency markets and the new roof mounted integrated CHP heat recovery modules, designed specifically for our Signature Series product, is expected to add additional revenue opportunities.

6. Cost and Core Competencies  We believe that the core competencies of our products are air bearing technology, advanced combustion technology and sophisticated power electronics to form efficient and ultra-low emission electricity and cooling and heat production systems. Our core intellectual property is contained within our air bearing technology. We continue to review avenues for cost reduction by sourcing to the best value supply chain option. In order to utilize manufacturing facilities and technology more effectively, we are focused on continuous improvements in manufacturing processes. Additionally, considerable effort is being directed to manufacturing cost reduction through process improvement, product design, advanced manufacturing technology, supply management and logistics. Management expects to be able to leverage our costs as product volumes increase.

We believe that effective execution in each of these key areas will be necessary to leverage Capstone’s promising technology and early market leadership into achieving positive cash flow with growing market presence and improving financial performance. Based on our recent progress and assuming achievement of targeted cost reductions and product mix, pricing and performance, our updated financial model indicates that we will achieve positive cash flow when we generate $25 million in quarterly revenue with a 20% gross margin. We are in the process of consolidating our manufacturing processes into our Van Nuys location. We believe that once this is complete we will have a production capacity of approximately 2,000 units per year, depending on product mix. We believe we will be able to support this production capacity level by adding additional shifts, which would increase working capital requirements, and making some additional capital expenditures.

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Critical Accounting Policies and Estimates

The preparation of our condensed consolidated financial statements requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenue and expenses. Management believes the most complex and sensitive judgments, because of their significance to the condensed consolidated financial statements, result primarily from the need to make estimates about the effects of matters that are inherently uncertain. Actual results could differ from management’s estimates. Management believes the critical accounting policies listed below affect our more significant accounting judgments and estimates used in the preparation of the condensed consolidated financial statements. These policies are described in greater detail in our Annual Report on Form 10-K for Fiscal 2017 and continue to include the following areas:

· Impairment of long-lived assets, including intangible assets with finite lives;

· Inventory write-downs and classification of inventories;



· Estimates of warranty obligations;



· Accounts receivable allowances;



· Deferred tax assets and valuation allowance; and



· Stock-based compensation expense.

Results of Operations

Three Months Ended September 30, 2017 and 2016

The following table summarizes our revenue by geographic markets (amounts in millions):

	Three Months Ended September 30,
	2017		2016
	Revenue		Revenue
United States and Canada	$	9.2	$	3.4
Europe and Russia		4.5		7.0
Latin America		1.4		1.9
Asia and Australia		3.6		2.5
Middle East and Africa		1.1		0.2
Total	$	19.8	$	15.0

Revenue  Revenue for the three months ended September 30, 2017 increased $4.8 million, or 32%, to $19.8 million from $15.0 million for the three months ended September 30, 2016. The change in revenue for the three months ended September 30, 2017 compared to the three months ended September 30, 2016 included increases in revenue of $5.8 million from the United States and Canadian markets, $1.1 million from the Asian and Australian markets and $0.9 million from the Middle East and African markets. These overall increases in revenue were offset by decreases in revenue of $2.5 million from the European and Russian markets and $0.5 million from the Latin American market. The increase in revenue in the United States and Canadian markets during the three months ended September 30, 2017 compared to the same period the previous year was primarily because we shipped a higher number of our C1000 Series systems in these markets. The increase in revenue in the Asian and Australian markets was primarily the result of large non-recurring microturbine product shipments for specific projects that had occurred during the three months ended September 30, 2017. The increase in revenue in the Middle East and African markets during the three months ended September 30, 2017 compared to the same period in the previous year was primarily the result of our continued investment in key growth initiatives in those markets. Despite the increase in revenue in the Middle East and African markets, our revenue continues to be negatively impacted by the volatility of the global oil and gas markets, a strong U.S. dollar (making our products more expensive overseas) and ongoing geopolitical tensions in Russia, North Africa and the Middle East. The decrease in revenue in the European and Russian markets during the three months ended September 30, 2017 was primarily because there were no microturbine product shipments to Russia during the three months ended September 30, 2017 compared to the same period last year. The decrease in revenue in the Latin American

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market during the three months ended September 30, 2017 compared to the same period the previous year was primarily the result of a strong U.S. dollar and reduced capital and operational spending, particularly in the upstream and midstream sectors of the oil and gas markets.

The following table summarizes our revenue (revenue amounts in millions):

	Three Months Ended September 30,
	2017				2016
	Revenue		Megawatts	Units	Revenue		Megawatts	Units
Microturbine Product	$	12.2	11.3	68	$	8.2	8.2	58
Accessories and Parts		3.8				3.3
Service		3.8				3.5
Total Accessories, Parts and Service		7.6				6.8
Total	$	19.8			$	15.0

For the three months ended September 30, 2017, revenue from microturbine products increased $4.0 million, or 49%, to $12.2 million from $8.2 million for the three months ended September 30, 2016. Megawatts shipped during the three months ended September 30, 2017 increased 3.1 megawatts, or 38%, to 11.3 megawatts from 8.2 megawatts during the three months ended September 30, 2016. The increase in revenue and megawatts shipped was because of a shift in product mix, as we sold a higher number of our C65, C200 and C1000 Series systems during the three months ended September 30, 2017 compared to the same period last year. The timing of shipments is subject to change based on several variables (including customer deposits, payments, availability of credit and delivery schedule changes), most of which are not within our control and can affect the timing of our revenue. Average revenue per megawatt shipped was approximately $1.1 million and $1.0 million during the three months ended September 30, 2017 and 2016, respectively.

For the three months ended September 30, 2017, revenue from our accessories and parts increased $0.5 million, or 15%, to $3.8 million from $3.3 million for the three months ended September 30, 2016. The increase in revenue from accessories and parts was primarily because of higher accessories shipments of our Organic Rankine Cycle (“ORC”) systems offset by lower parts shipments. The decrease in parts shipments was primarily because of a shift in sales to our FPP service agreements and delivery schedule changes of certain large parts orders.

Service revenue for the three months ended September 30, 2017 increased $0.3 million, or 9%, to $3.8 million from $3.5 million for the three months ended September 30, 2016. The increase in service revenue was primarily the result of our growing installed base and an increase in our energy efficiency customers purchasing our FPP service agreements.

Sales to Reliable Secure Power Systems, (“RSP”), Regatta Solutions, Inc. (“Regatta”) and E-Finity Distributed Generation, LLC (“E-Finity”), three of our domestic distributors, and Optimal Group Australia Pty Ltd, one of our Australian distributors and IBT Europe GmbH (“IBT”), one of our European distributors, accounted for 12%, 11%, 11%, 11% and 10%, respectively, of revenue for the three months ended September 30, 2017. Sales to BPC Engineering (“BPC”), one of our Russian distributors, accounted for 11% of revenue for the three months ended September 30, 2016.

Gross Margin  Cost of goods sold includes direct material costs, production and service center labor and overhead, inventory charges and provision for estimated product warranty expenses. The gross margin was $3.0 million, or 15% of revenue, for the three months ended September 30, 2017 compared to a gross margin of $0.7 million, or 5% of revenue, for the three months ended September 30, 2016. The increase in gross margin of $2.3 million, compared to the three months ended September 30, 2016 was primarily because of a shift in product mix of $2.4 million, lower expenses associated with warranty costs of $0.4 million, offset by an increase in production and service center labor and overhead expense of $0.3 million, higher royalty expense of $0.1 million and an increase in inventory charges of $0.1 million. In addition to consolidating our manufacturing processes into our Van Nuys location, management continues to implement initiatives to improve gross margin in Fiscal 2018 by further reducing manufacturing overhead and fixed and direct material costs and improving product performance as we work to achieve profitability.

Warranty expense is a combination of a standard warranty provision recorded at the time revenue is recognized and changes, if any, in estimates for reliability repair programs. Reliability repair programs are based upon estimates that are recorded in the period that new information becomes available, including design changes, cost of repair and product

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enhancements, which can include both in-warranty and out-of-warranty systems. The decrease in warranty expense of $0.4 million during the three months ended September 30, 2017 compared to the three months ended September 30, 2016 reflects a decrease in warranty accommodations and warranty claims in the current period. Management expects warranty expense in Fiscal 2018 to be lower than in Fiscal 2017 primarily because of a decrease in reliability repair programs.

Production and service center labor and overhead expense increased $0.3 million during the three months ended September 30, 2017 compared to the three months ended September 30, 2016 primarily because of approximately $0.2 million lower overhead allocated to finished goods inventory and approximately $0.1 million recorded for severance costs related to cost reduction activities.  

Royalty expense increased $0.1 million during the three months ended September 30, 2017 compared to the three months ended September 30, 2016 primarily as a result of higher sales of our C1000 Series systems which pays a higher royalty. We pay a predetermined fixed rate royalty for each microturbine system covered by our Development and License Agreement with Carrier.

Inventory charges increased $0.1 million during the three months ended September 30, 2017 compared to the three months ended September 30, 2016 primarily as the result of an increase in reserve for excess and obsolete inventory.

The following table summarizes our gross margin (in millions except percentages):

	Three Months Ended September 30,
	2017			2016
Gross Margin
Product	$	0.9		$	(1.1)
As a percentage of product revenue		7	%		(14)	%
Accessories, parts and service	$	2.1		$	1.8
As a percentage of accessories, parts and service revenue		28	%		27	%
Total Gross Margin	$	3.0		$	0.7
As a percentage of total revenue		15	%		5	%

Product gross margin increased to 7% during the three months ended September 30, 2017 compared to the three months ended September 30, 2016 primarily because of a shift in product mix, warranty accommodations and warranty claims in the current period, offset by an increase in production and service center labor and overhead expense primarily because of lower overhead allocated to finished goods inventory. Accessories, parts and service gross margin increased to 28% during the three months ended September 30, 2017 compared to the three months ended September 30, 2016 primarily because of higher accessories shipments of our ORC systems, increase in energy efficiency customers purchasing our FPP service agreements and timing of FPP services performed.

Research and Development (“R&D”) Expenses R&D expenses for the three months ended September 30, 2017 decreased $0.3 million, or 21%, to $1.1 million from $1.4 million in the three months ended September 30, 2016. The overall decrease in R&D expenses of approximately $0.3 million resulted from decreases in supplies expense of approximately $0.2 million and salaries expense of $0.1 million, net of approximately $0.1 million recorded for severance costs related to cost reduction activities. This overall decrease was a result of the reduction of the number of active research projects, because of our initiatives to reduce operating expenses and achieve profitability. Management expects R&D expenses in Fiscal 2018 to be lower than in Fiscal 2017 as a result of the continued cost reduction initiatives.

Selling, General, and Administrative (“SG&A”) Expenses  SG&A expenses for the three months ended September 30, 2017 decreased $0.2 million, or 4%, to $4.8 million from $5.0 million for the three months ended September 30, 2016. The net decrease in SG&A expenses was comprised of decreases of approximately $0.4 million in salaries expense, $0.2 million in facilities expense and $0.1 million in professional services, including accounting and legal expenses. These decreases were offset by lower bad debt recovery of $0.5 million for the three months ended September 30, 2017 compared to same period last year. Excluding bad debt recovery, management expects SG&A

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expenses in Fiscal 2018 to be lower than in Fiscal 2017 primarily as a result of our continued initiatives to reduce operating expenses and achieve profitability.

Interest Expense  Interest expense was $0.1 million during each of the three months ended September 30, 2017 and 2016. As of September 30, 2017, we had total debt of $9.6 million outstanding under the credit facility.

Six Months Ended September 30, 2017 and 2016

The following table summarizes our revenue by geographic markets (amounts in millions):

	Six Months Ended September 30,
	2017		2016
	Revenue		Revenue
United States and Canada	$	19.6	$	11.0
Europe and Russia		7.1		12.4
Latin America		2.9		4.1
Asia and Australia		6.4		6.2
Middle East and Africa		3.0		0.4
Total	$	39.0	$	34.1

Revenue  Revenue for the six months ended September 30, 2017 increased $4.9 million, or 14%, to $39.0 million from $34.1 million for the six months ended September 30, 2016. The change in revenue for the six months ended September 30, 2017 compared to the six months ended September 30, 2016 included increases in revenue of $8.6 million from the United States and Canadian markets, $2.6 million from the Middle East and African markets and $0.2 million from the Asian and Australian markets. These overall increases in revenue were offset by decreases in revenue of $5.3 million from the European and Russian markets and $1.2 million from the Latin American market. The increase in revenue in the United States and Canadian markets during the six months ended September 30, 2017 compared to the same period the previous year was primarily because the energy efficiency vertical market continues to improve on our C1000 Signature Series in these markets. The increase in revenue in the Middle East and African markets during the six months ended September 30, 2017 compared to the same period in the previous year was primarily the result of our continued investment in key growth initiatives in those markets. Despite the increase in revenue in the Middle East and African markets, our revenue continues to be negatively impacted by the volatility of the global oil and gas markets, a strong U.S. dollar (making our products more expensive overseas) and ongoing geopolitical tensions in Russia, North Africa and the Middle East. The increase in revenue in the Asian and Australian markets was primarily because we shipped more C65 microturbines into these markets during the six months ended September 30, 2017 compared to the same period last year. The decrease in revenue in the European and Russian markets during the six months ended September 30, 2017 was primarily because there were no microturbine product shipments to Russia during the six months ended September 30, 2017 compared to the same period last year. The decrease in revenue in the Latin American market during the six months ended September 30, 2017 compared to the same period the previous year was primarily the result of a strong U.S. dollar and reduced capital and operational spending, particularly in the upstream and midstream sectors of the oil and gas markets.

The following table summarizes our revenue (revenue amounts in millions):

	Six Months Ended September 30,
	2017				2016
	Revenue		Megawatts	Units	Revenue		Megawatts	Units
Microturbine Product	$	24.8	23.4	120	$	20.3	19.9	128
Accessories and Parts		6.7				7.0
Service		7.5				6.8
Total Accessories, Parts and Service		14.2				13.8
Total	$	39.0			$	34.1

For the six months ended September 30, 2017, revenue from microturbine products increased $4.5 million, or 22%, to $24.8 million from $20.3 million for the six months ended September 30, 2016. Megawatts shipped during the six months ended September 30, 2017 increased 3.5 megawatts, or 18%, to 23.4 megawatts from 19.9 megawatts during

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the six months ended September 30, 2016. The increase in revenue and megawatts shipped was because of a shift in product mix, as we sold a higher number of our C1000 Series systems during the six months ended September 30, 2017 compared to the same period last year. The timing of shipments is subject to change based on several variables (including customer deposits, payments, availability of credit and delivery schedule changes), most of which are not within our control and can affect the timing of our revenue. Average revenue per megawatt shipped was approximately $1.1 million and $1.0 million during the six months ended September 30, 2017 and 2016, respectively.

For the six months ended September 30, 2017, revenue from our accessories and parts decreased $0.3 million, or 4%, to $6.7 million from $7.0 million for the six months ended September 30, 2016. The decrease in revenue from accessories and parts was primarily because of delivery schedule changes of certain large parts orders, offset by higher accessories shipments of our ORC systems.

Service revenue for the six months ended September 30, 2017 increased $0.7 million, or 10%, to $7.5 million from $6.8 million for the six months ended September 30, 2016. The increase in service revenue was primarily the result of our growing installed base and an increase in our energy efficiency customers purchasing our FPP service agreements.

For the six months ended September 30, 2017, E-Finity, Horizon Power Systems (“Horizon”) and Optimal accounted for 13%, 12% and 10% of revenue, respectively. For the six months ended September 30, 2016, Regatta Solutions, Inc. (“Regatta”), one of our domestic distributors, accounted for 11% of revenue.

Gross Margin  Cost of goods sold includes direct material costs, production and service center labor and overhead, inventory charges and provision for estimated product warranty expenses. The gross margin was $5.2 million, or 13% of revenue, for the six months ended September 30, 2017 compared to a gross margin of $3.7 million, or 11% of revenue, for the six months ended September 30, 2016. The increase in gross margin of $1.5 million, compared to the six months ended September 30, 2016 was primarily because of a shift in product mix of $1.6 million and lower production and service center labor and overhead expense of $0.2 million, offset by incremental warranty expense of $0.2 million and higher royalty expense of $0.1 million. In addition to consolidating our manufacturing processes into our Van Nuys location, management continues to implement initiatives to improve gross margin in Fiscal 2018 by further reducing manufacturing overhead and fixed and direct material costs, and improving product performance as we work to achieve profitability.

The increase in warranty expense of $0.2 million during the six months ended September 30, 2017 compared to the six months ended September 30, 2016 reflects warranty accommodations and warranty claims in the current period and the result of a benefit recognized in the same period last year related to the decrease in the number of units covered under warranty. Management expects warranty expense in Fiscal 2018 to be lower than in Fiscal 2017 primarily because of a decrease in reliability repair programs.

Production and service center labor and overhead expense decreased $0.2 million during the six months ended September 30, 2017 compared to the six months ended September 30, 2016 primarily because of decreases of $0.3 million in salaries expense, $0.2 million in loss in fixed asset disposal expense and $0.1 million in supplies expense, offset by an increases of $0.2 million in freight expense and $0.2 million in lower overhead allocated to finished goods inventory. These decreases were primarily the result of our cost reduction program to lower labor and overhead expenses throughout the organization.

Royalty expense increased $0.1 million during the six months ended September 30, 2017 compared to the six months ended September 30, 2016 primarily as a result of higher sales of our C1000 Series systems which pay a higher royalty. We pay a predetermined fixed rate royalty for each microturbine system covered by our Development and License Agreement with Carrier.

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The following table summarizes our gross margin (in millions except percentages):

	Six Months Ended September 30,
	2017			2016
Gross Margin
Product	$	0.9		$	(0.3)
As a percentage of product revenue		4	%		(2)	%
Accessories, parts and service	$	4.3		$	4.0
As a percentage of accessories, parts and service revenue		30	%		29	%
Total Gross Margin	$	5.2		$	3.7
As a percentage of total revenue		13	%		11	%

Product gross margin increased to 4% during the six months ended September 30, 2017 compared to the six months ended September 30, 2016 primarily because of a shift in product mix, warranty accommodations and warranty claims in the current period. Accessories, parts and service gross margin increased to 30% during the six months ended September 30, 2017 compared to the six months ended September 30, 2016 primarily because of higher accessories shipments of our ORC systems, increase in energy efficiency customers purchasing our FPP service agreements and timing of FPP services performed.

R&D Expenses R&D expenses for the six months ended September 30, 2017 decreased $0.7 million, or 23%, to $2.3 million from $3.0 million in the six months ended September 30, 2016. The overall decrease in R&D expenses of approximately $0.7 million resulted from decreases in salaries expense of $0.5 million and supplies expense of approximately $0.2 million, which was a result of the reduction of the number of active research projects, because of our initiatives to reduce operating expenses and achieve profitability. Management expects R&D expenses in Fiscal 2018 to be lower than in Fiscal 2017 as a result of the continued cost reduction initiatives.

SG&A Expenses  SG&A expenses for the six months ended September 30, 2017 decreased $1.0 million, or 9%, to $9.8 million from $10.8 million for the six months ended September 30, 2016. The net decrease in SG&A expenses was comprised of decreases of approximately $0.8 million in salaries expense, $0.8 million in professional services, including accounting and legal expenses, $0.4 million in facilities expense, $0.3 million in marketing expense and $0.1 million in consulting expense. These decreases were offset by lower bad debt recovery of $1.4 million for the six months ended September 30, 2017 compared to same period last year. Excluding bad debt recovery, management expects SG&A expenses in Fiscal 2018 to be lower than in Fiscal 2017 primarily as a result of our continued initiatives to reduce operating expenses and achieve profitability.

Interest Expense  Interest expense was $0.3 million during each of the six months ended September 30, 2017 and 2016. As of September 30, 2017, we had total debt of $9.6 million outstanding under the credit facility.

Liquidity and Capital Resources

Our cash requirements depend on many factors, including the execution of our plan. We expect to continue to devote substantial capital resources to running our business and implementing the strategic changes summarized herein. Our planned capital expenditures for the year ending March 31, 2018 include approximately $1.0 million for plant and equipment costs related to manufacturing and operations. Management expects to spend less than planned as a result of a change in timing of capital expenditures for the replacement of older equipment. Our cash is held in depository institution accounts to provide liquidity for operations and for capital preservation.

Our cash, cash equivalents and restricted cash balances decreased $4.5 million during the six months ended September 30, 2017, compared to a decrease of $0.6 million during the six months ended September 30, 2016. Cash, cash equivalents and restricted cash decreased during the six months ended September 30, 2017 primarily because of cash generated from financing activities during the six months ended September 30, 2016 primarily because of proceeds from the April 2016 underwritten public offering as described below.

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Operating Activities  During the six months ended September 30, 2017, we used $5.9 million in cash in our operating activities, which consisted of a net loss for the period of $7.8 million and cash used for working capital of $1.4 million, offset by non-cash adjustments (primarily change in warrant valuation, warranty provision, accounts receivable allowances, depreciation and amortization, stock based compensation and inventory provision) of $3.3 million. During the six months ended September 30, 2016, we used $10.0 million in cash in our operating activities, which consisted of a net loss for the period of $10.4 million and cash used for working capital of $1.0 million, offset by non-cash adjustments of $1.4 million.

The following is a summary of the significant sources (uses) of cash from operating activities (amounts in thousands):

	Six Months Ended September 30,
	2017		2016
Net loss	$	(7,760)	$	(10,382)
Non-cash operating activities(1)		3,269		1,399
Changes in operating assets and liabilities:
Accounts receivable		3,778		2,221
Inventories		(2,360)		(1,442)
Accounts payable and accrued expenses		(790)		(1,156)
Other changes in operating assets and liabilities		(1,989)		(667)
Net cash used in operating activities	$	(5,852)	$	(10,027)

(1) Represents change in warrant valuation, warranty provision, depreciation and amortization, fair value of warrants, stock-based compensation expense, inventory provision and accounts receivable allowances.

The change in non-cash operating activities during the six months ended September 30, 2017 compared to the same period the previous year was primarily because of accounts receivable allowances offset by change in warrant valuation. The change in accounts receivable was the result of higher collection of accounts receivable during the six months ended September 30, 2017 compared to the six months ended September 30, 2016. The change in inventory was primarily the result of a decrease in finished goods, offset by an increase in raw materials during the six months ended September 30, 2017 compared to the same period the previous year. The change in accounts payable and accrued expenses was primarily the result of the level of inventory receipts and timing of payments made by us during the six months ended September 30, 2017 compared to the same period the previous year. The change in other operating assets and liabilities was primarily because of warranty payments for the proactive retrofit of certain non-Signature Series C200 microturbines and deposits for product orders during the six months ended September 30, 2017 compared to the six months ended September 30, 2016.  

Investing Activities  Net cash used in investing activities of $0.5 million and $0.1 million during the six months ended September 30, 2017 and 2016, respectively, relates primarily to the acquisition of fixed assets.

Financing Activities During the six months ended September 30, 2017, we generated approximately $1.8 million in financing activities compared to cash generated during the six months ended September 30, 2016 of approximately $9.5 million. The funds generated from financing activities during the six months ended September 30, 2017 were primarily the result of proceeds from the at-the-market offering program described below, offset by net repayments under the credit facility and the repayment of notes payable and capital lease obligations. The funds generated from financing activities during the six months ended September 30, 2016 were primarily the result of proceeds from the April 2016 underwritten public offering described below, offset by net repayments under the credit facility and the repayments of notes payable and capital lease obligations.

On October 18, 2016, we entered into a securities purchase agreement with certain accredited investors, pursuant to which we agreed to sell 3,600,000 shares of common stock, pre-funded Series B warrants to purchase up to 2,700,000 shares of common stock (“the October 2016 Offering”), and Series A warrants to purchase up to 6,300,000 shares of common stock. Pursuant to a placement agent agreement, dated as of October 18, 2016, we engaged Oppenheimer & Co. Inc. as the lead placement agent for the offering and ROTH Capital Partners, LLC as co-placement agent for the offering. Each share of common stock was sold at a price of $1.20. Each Series B warrant was issued with an exercise price of $1.20 per share of common stock, $1.19 of which was pre-funded at closing and $0.01 of which is payable upon exercise. Each Series A warrant was issued with an initial exercise price of $1.34 per share of common

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stock. These Series A warrants contain anti-dilution provisions that reduce the exercise price of the warrants if certain dilutive issuances occur. The anti-dilution provisions of the Series A warrants were approved by our stockholders at the 2017 annual meeting of stockholders held on August 31, 2017 and exercise price of the warrants was adjusted to $0.65 per share. The value of this down round feature was measured using the Binomial valuation model and resulted in a loss of approximately $0.7 million during the three and six months ended September 30, 2017, respectively. The net proceeds to us from this offering, after deducting the placement agent fees and other estimated offering expenses, were approximately $6.8 million. The offering closed on October 21, 2016. 

On April 19, 2016, we entered into an underwriting agreement with Oppenheimer & Co. Inc. as the sole book-running manager, and Rodman & Renshaw, a unit of H.C. Wainwright & Co., LLC, as the co-manager, related to public offering of 2.7 million shares of our common stock and pre-funded Series B warrants to purchase up to 5.5 million shares of common stock, which were offered in lieu of common stock to those purchasers whose purchase of common stock in the offering otherwise would result in the purchaser beneficially owning more than 4.99% of our outstanding common stock following the completion of the offering (the “April 2016 Offering”). Also included in the offering were Series A warrants to purchase 4.1 million shares of common stock. Every two shares of common stock were sold with one Series A warrant to purchase one share of common stock at a collective negotiated price of $3.50. Every two Series B warrants were sold with one Series A warrant to purchase one share of common stock at a collective negotiated price of $3.48. The net proceeds to us from the sale of the common stock and warrants, after deducting fees and other offering expenses, were approximately $13.1 million. The offering closed on April 22, 2016.

Effective August 28, 2015, we entered into a sales agreement with respect to an at-the-market offering program pursuant to which we may offer and sell, from time to time at its sole discretion, shares of our common stock, having an aggregate offering price of up to $30.0 million. We will set the parameters for sales of the shares, including the number to be sold, the time period during which sales are requested to be made, any limitation on the number that may be sold in one trading day and any minimum price below which sales may not be made. During the three months ended September 30, 2017, we issued 2.4 million shares of our common stock under the at-the-market offering program and the net proceeds to us from the sale of our common stock were approximately $1.4 million after deducting commissions paid of approximately $45,000. During the six months ended September 30, 2017, we issued 5.8 million shares of our common stock under the at-the-market offering program and the net proceeds to us from the sale of our common stock were approximately $4.0 million after deducting commissions paid of approximately $0.1 million. As of September 30, 2017, 13.1 million shares of our common stock were sold pursuant to the at-the-market offering program and the net proceeds to us from the sale of the common stock were approximately $16.8 million after deducting commissions paid of approximately $0.5 million. As of September 30, 2017, $12.2 million remained available for issuance with respect to the at-the-market offering program. These available proceeds are subject to Instruction I.B.6(a) to Form S-3 often referred to as the “Baby Shelf Rules.”

There were no stock options exercised during the six months ended September 30, 2017 and 2016, respectively. Repurchases of shares of our common stock for employee taxes due on vesting of restricted stock units, net of employee stock purchases resulted in approximately $22,000 and $16,000 of net cash used during the six months ended September 30, 2017 and 2016, respectively.

Former Credit Facility  We maintained two Credit Agreements, with Wells Fargo, which provided us with a line of credit of up to $20.0 million in the aggregate. As of March 31, 2017, $11.5 million in borrowings were outstanding under the former credit facility. Upon closing with Bridge Bank, our existing credit facilities with Wells Fargo were paid off in full.

New Credit Facility  On June 2, 2017, we entered into two secured credit facilities (the “Bridge Bank Credit Agreements”) with Western Alliance Bank through its Bridge Bank division (“Bridge Bank”), with credit support provided by the Export-Import Bank of the United States through its working capital guarantee program.  Under the terms of the Bridge Bank Credit Agreements, we may borrow up to $12.0 million on a revolving basis depending on, among other factors, the amount of our eligible inventory and accounts receivable. The Bridge Bank Credit Agreements are for a two-year period ending June 2, 2019. As of September 30, 2017, $9.6 million in borrowings were outstanding under the new credit facility.

Total borrowings, letter of credit obligations and the then aggregate committed amount of cash management services under the Bridge Bank Credit Agreements may not exceed 85% of the sum of unrestricted cash and the amount of cash collateral held at Bridge Bank. As a condition of the Bridge Bank Credit Agreements, we have restricted $5.0

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million of cash equivalents as additional security for the credit facility. Borrowings under the Bridge Bank Credit Agreements will bear per annum interest at the prime rate plus 1.5 percent, subject to increase during the occurrence of an event of default. Obligations under the Bridge Bank Credit Agreements are secured by all of our assets, including intellectual property and general intangibles.

The Bridge Bank Credit Agreements include affirmative covenants as well as negative covenants that prohibit a variety of actions without Bridge Bank’s consent, including covenants that limit our ability to (a) incur or guarantee debt, (b) create liens, (c) enter into any merger, recapitalization or similar transaction or purchase all or substantially all of the assets or stock of another entity, or (d) sell, assign, transfer or otherwise dispose of our assets. 

The financial covenants of the domestic credit agreement with Bridge Bank (the “Domestic Facility”), which is included in the Bridge Bank Credit Agreements, requires us not to exceed specified levels of losses relative to our financial model and the outstanding line of credit advances may not exceed 85% of the sum of unrestricted cash and the amount of cash collateral held at Bridge Bank. The Domestic Facility also defines an event of default to include a material adverse effect on our business. An event of default for this or any other reason, if not waived, could have a material adverse effect on us. As of September 30, 2017 we were in compliance with the covenants contained in the Bridge Bank Credit Agreements for Fiscal 2018. 

Working Capital Cash used for working capital was $1.4 million during the six months ended September 30, 2017, an increase of $0.4 million from the $1.0 million cash used for working capital during the six months ended September 30, 2016. We attribute the increase in our working capital requirements primarily because of higher warranty payments, offset by higher collection of accounts receivable and a decrease in finished goods. Additionally, we didn’t fully achieve our planned number of product shipments during the six months ended September 30, 2017, resulting in lower than expected revenue.

Evaluation of Ability to Maintain Current Level of Operations In connection with preparing the consolidated financial statements for the six months ended September 30, 2017, management evaluated whether there were conditions and events, considered in the aggregate, that raised substantial doubt about our ability to meet our obligations as they became due for the next twelve months from the date of issuance of our second quarter of Fiscal 2018 financial statements. Management assessed that there were such conditions and events, including a history of recurring operating losses, negative cash flows from operating activities, the continued negative impact by the volatility of the global oil and gas markets, a strong U.S. dollar (making our products more expensive overseas) and ongoing geopolitical tensions in Russia, North Africa and Middle East. Cash provided by working capital during the six months ended September 30, 2017 were higher than planned, primarily because of cash provided by accounts receivable. However, we did not fully achieve our planned number of product shipments during the six months ended September 30, 2017, resulting in lower than expected revenue. We incurred a net loss of $7.8 million and used cash in operating activities of $5.9 million for the second quarter of Fiscal 2018. In addition, at September 30, 2017, we had cash, cash equivalents and restricted cash of $15.2 million, and outstanding borrowings under our credit facility of $9.6 million.

Management evaluated these conditions in relation to our ability to meet our obligations as they become due. Our ability to continue current operations and to execute on management’s plan is dependent on our ability to generate cash flows from operations. Management believes that we will continue to make progress on our path to profitability by continuing to lower our operating costs and to develop our geographical and vertical markets. We may seek to raise funds by selling additional securities (through the at-the-market offering or otherwise) to the public or to selected investors or by obtaining additional debt financing. There is no assurance that we will be able to obtain additional funds on commercially favorable terms or at all. If we raise additional funds by issuing additional equity or convertible debt securities, the fully diluted ownership percentages of existing stockholders will be reduced. In addition, any equity or debt securities that we would issue may have rights, preferences or privileges senior to those of the holders of our common stock. 

Based on our current operating plan, management anticipates that, given current working capital levels, current financial projections, the ability to borrow under our credit facility with Bridge Bank, net proceeds from exercise of Series A warrants and the funds expected to be received from the new oil and gas sector distributor in Russia, we will be able to meet our financial obligations as they become due over the next twelve months from the date of issuance of its second quarter of Fiscal 2018 financial statements. See Note 17— Subsequent Events, for discussion with respect to the exercise of Series A warrants and new Russian distributor.

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Depending on the timing of our future sales and collection of related receivables, managing inventory costs and the timing of inventory purchases and deliveries required to fulfill the backlog, our future capital requirements may vary materially from those now planned. The amount of capital that we will need in the future will require us to achieve significantly increased sales volume which is dependent on many factors, including:

· the market acceptance of our products and services;

· our business, product and capital expenditure plans;

· capital improvements to new and existing facilities;

· our competitors’ response to our products and services;

· our relationships with customers, distributors, dealers and project resellers; and

· our customers’ ability to afford and/or finance our products.

Our accounts receivable balance, net of allowances, was $13.2 million and $17.0 million as of September 30, 2017 and March 31, 2017, respectively. Days sales outstanding in accounts receivable, (“DSO”), decreased by 17 days to 61 days as of September 30, 2017 compared to 78 days as of September 30, 2016. The change in DSO was largely the result of higher collection of accounts receivable during the second quarter of Fiscal 2018 compared to the second quarter of Fiscal 2017. We recorded net bad debt recoveries of approximately $22,000 and $1.4 million for the six months ended September 30, 2017 and 2016, respectively. During Fiscal 2015, we recorded approximately $7.1 million and $2.6 million with respect to the accounts receivable allowances for BPC and EMI, respectively.

No assurances can be given that future bad debt expense will not increase above current operating levels. Increased bad debt expense or delays in collecting accounts receivable could have a material adverse effect on cash flows and results of operations. In addition, our ability to access the capital markets may be severely restricted or made very expensive at a time when we need, or would like, to do so, which could have a material adverse impact on our liquidity and financial resources. Certain industries in which our customers do business and certain geographic areas have been and could continue to be adversely affected by the previously referenced economic and geopolitical considerations.

New Accounting Pronouncements

In July 2017, the Financial Accounting Standards Board (“FASB”) issued a two-part Accounting Standards Update (“ASU”) No. 2017-11, I. Accounting for Certain Financial Instruments With Down Round Features and II. Replacement of the Indefinite Deferral for Mandatorily Redeemable Financial Instruments of Certain Nonpublic Entities and Certain Mandatorily Redeemable Noncontrolling Interests With a Scope Exception (“ASU 2017-11”). ASU 2017-11 amends guidance in FASB ASC 260, Earnings Per Share, FASB ASC 480, Distinguishing Liabilities from Equity, and FASB ASC 815, Derivatives and Hedging. The amendments in Part I of ASU 2017-11 change the classification analysis of certain equity-linked financial instruments (or embedded features) with down round features. The amendments in Part II of ASU 2017-11 re-characterize the indefinite deferral of certain provisions of Topic 480 that now are presented as pending content in the Codification, to a scope exception. Those amendments do not have an accounting effect. ASU 2017-11 is effective for public business entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. Early adoption is permitted. We adopted ASU 2017-11 for the three months ended June 30, 2017, and retrospectively applied ASU 2017-11 as required. See Note 10—Fair Value Measurements for further discussion on changes as a result of the adoption of ASU 2017-11.

In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842), (“ASU 2016-02”). The purpose of ASU 2016-02 is to provide financial statement users a better understanding of the amount, timing, and uncertainty of cash flows arising from leases. The adoption of ASU 2016-02 will result in the recognition of a right-of-use asset and a lease liability for most operating leases. New disclosure requirements include qualitative and quantitative information about the amounts recorded in the financial statements. In September 2017, the FASB issued ASU 2017-13, Revenue Recognition (Topic 605), Revenue from Contracts with Customers (Topic 606), Leases (Topic 840), and Leases (Topic 842), which provides additional implementation guidance on the previously issued ASU 2016-02 Leases (Topic 842). ASU 2016-02 requires a lessee to recognize assets and liabilities on the balance sheet for leases with lease terms greater

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than 12 months. ASU 2016-02 is effective for fiscal years beginning after December 15, 2018. ASU 2016-02 requires a modified retrospective transition by means of a cumulative-effect adjustment to retained earnings as of the beginning of the fiscal year in which the guidance is effective with the option to elect certain practical expedients. Early adoption is permitted. We are currently evaluating the impact of ASU 2016-02 on our consolidated financial position and results of operations.

In July 2015, the FASB issued ASU 2015-11, Simplifying the Measurement of Inventory (“ASU 2015-11”). ASU 2015-11 requires inventory that is recorded using the first-in, first-out method to be measured at the lower of cost or net realizable value. ASU 2015-11 is effective for annual and interim periods beginning after December 15, 2016, and should be applied prospectively with early adoption permitted at the beginning of an interim or annual reporting period. We adopted ASU 2015-11 with no impact on our consolidated financial position or results of operations.

Revenue Recognition Related ASUs:

In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (“ASU 2014-09”). ASU 2014-09 supersedes nearly all existing revenue recognition guidance under GAAP. The standard’s core principle is that a company will recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which we expect to be entitled in exchange for those goods or services.

In August 2015, the FASB issued FASB ASU No. 2015-14, Revenue from Contracts with Customers: Deferral of the Effective Date (“ASU 2014-09”), which deferred the effective date of ASU 2014-09 by one year. ASU 2014-09 is now effective for annual reporting periods beginning after December 15, 2017, including interim periods within that reporting period, using one of two retrospective application methods. Early application is permitted only as of annual reporting periods beginning after December 15, 2016, including interim reporting periods within that reporting period.

In March 2016, the FASB issued FASB ASU No. 2016-08, Revenue from Contracts with Customers: Principal versus Agent Considerations (“ASU 2016-08”). ASU 2016-08 clarifies the implementation guidance on principal versus agent considerations.

In April 2016, the FASB issued ASU No. 2016-10, Revenue from Contracts with Customers: Identifying Performance Obligations and Licensing (“ASU 2016-10”). ASU 2016-10 clarifies the implementation guidance for identifying performance obligations and determining when to recognize revenue on licensing agreements for intellectual property.

In May 2016, the FASB issued ASU No. 2016-11, Revenue Recognition and Derivatives and Hedging: Rescission of SEC Guidance Because of ASU 2014-09 and ASU 2014-16 Pursuant to Staff Announcements at the March 3, 2016 EITF Meeting (“ASU 2016-11”). ASU 2016-11 rescinds certain SEC staff comments previously made in regard to these ASU’s.

In May 2016, the FASB issued ASU No. 2016-12, Revenue from Contracts with Customers: Narrow-Scope Improvements and Practical Expedients (“ASU 2016-12”) that provide guidance on assessing collectability, presentation of sales taxes, noncash consideration, and completed contracts and contract modifications at transition.

In December 2016, the FASB issued ASU 2016-20, Technical Corrections and Improvements to ASU 2014-09. The amendments in ASU 2014-09 affect narrow aspects of the guidance in ASU 2014-09, which is not yet effective. The amendments in ASU 2014-09 address loan guarantee fees, impairment testing of contract costs, provisions for losses on construction-type and production-type contracts, and various disclosures.

In September 2017, the FASB issued ASU 2017-13, “Revenue Recognition (Topic 605), Revenue from Contracts with Customers (Topic 606), Leases (Topic 840), and Leases (Topic 842): Amendments to SEC Paragraphs Pursuant to the Staff Announcement at the July 20, 2017 EITF Meeting and Rescission of Prior SEC Staff Announcements and Observer Comments”(“ASU 2017-13”) The amendments in ASU 2017-13 amends the early adoption date option for certain companies related to the adoption of ASU 2014-09 and ASU 2016-02.

We are evaluating our existing revenue recognition policies and the impact of ASU 2014-09, ASU 2015-14, ASU 2016-08, ASU 2016- 10, ASU 2016-11, ASU 2016-12 and ASU 2016-20, if any, on our financial position and results of operations. The effective date and transition requirements for the amendments are the same as the effective

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date and transition requirements for ASU 2014-09. We will be required to adopt the revenue recognition standard in annual reporting periods beginning after December 15, 2017 (fiscal year ending March 31, 2019) and interim periods within those annual periods.

Off-Balance Sheet Arrangements

We did not have during the periods presented, and we do not currently have, any off balance sheet arrangements, as defined under SEC rules.

Item 3.  Quantitative and Qualitative Disclosures About Market Risk

No material changes have occurred in our quantitative and qualitative market risk disclosure as presented in our Annual Report on Form 10-K for Fiscal 2017.

Item 4.  Controls and Procedures

Evaluation of Disclosure Controls and Procedures

Under the supervision and with the participation of our management, including the Chief Executive Officer and Chief Financial Officer, we have evaluated the effectiveness of the design and operation of our disclosure controls and procedures, as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), as of the end of the period covered by this report. Based upon that evaluation, our Chief Executive Officer and our Chief Financial Officer concluded that, as of the end of the period covered by this report, our disclosure controls and procedures are effective. The term “disclosure controls and procedures” means controls and other procedures of ours that are designed to ensure that information required to be disclosed by us in the reports that we file or submit under the Exchange Act is recorded, processed, summarized and reported within required time periods. Disclosure controls and procedures include, without limitation, controls and procedures designed to ensure that information required to be disclosed by us in the reports that we file or submit under the Exchange Act is accumulated and communicated to management, including our Chief Executive Officer and Chief Financial Officer, as appropriate, to allow timely decisions regarding required disclosure.

Changes in Internal Control Over Financial Reporting

There was no change in our internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act) during our most recently completed fiscal quarter that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

PART II — OTHER INFORMATION

Item 1.  Legal Proceedings

Federal Securities Class Action

Two putative securities class action complaints were filed against us and certain of our current and former officers in the United States District Court for the Central District of California under the following captions:  David Kinney, etc. v. Capstone Turbine, et al., No. 2:15-CV-08914 on November 16, 2015 (the “Kinney Complaint”) and Kevin M. Grooms, etc. v. Capstone Turbine, et al., No. 2:15-CV-09155 on December 18, 2015 (the “Grooms Complaint”).

The putative class in the Kinney Complaint is comprised of all purchasers of our securities between November 7, 2013 and November 5, 2015.  The Kinney Complaint alleges material misrepresentations and omissions in public statements regarding BPC and the likelihood that BPC would not be able to fulfill many legal and financial obligations to us.  The Kinney Complaint also alleges that our financial statements were not appropriately adjusted in light of this situation and were not maintained in accordance with GAAP, and that we lacked adequate internal controls over accounting.  The Kinney Complaint alleges that these public statements and accounting irregularities constituted violations by all named defendants of Section 10(b) of the Exchange Act, and Rule 10b-5 thereunder, as well as violations of Section 20(a) of the Exchange Act by the individual defendants.  The Grooms Complaint makes allegations

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and claims that are substantially identical to those in the Kinney Complaint, and both complaints seek compensatory damages of an undisclosed amount.  On January 16, 2016, several shareholders filed motions to consolidate the Kinney and Grooms actions and for appointment as lead plaintiff.  On February 29, 2016, the Court granted the motions to consolidate, and appointed a lead plaintiff.  On May 6, 2016, a Consolidated Amended Complaint with allegations and claims substantially identical to those of the Kinney Complaint was filed in the consolidated action.  The putative class period in the Consolidated Amended Complaint is June 12, 2014 to November 5, 2015.  Defendants filed a motion to dismiss the Consolidated Amended Complaint on June 17, 2016. On March 10, 2017, the Court issued an order granting Defendants’ motion to dismiss in its entirety with leave to amend. Plaintiffs filed an amended complaint on April 28, 2017. Defendants’ motion to dismiss was filed June 2, 2017. Plaintiffs filed their opposition to the motion to dismiss on July 7, 2017, and Defendants filed their reply in support of the motion to dismiss on July 28, 2017. The court vacated the hearing that was scheduled for August 18, 2017. We have not recorded any liability as of September 30, 2017 since any potential loss is not probable or reasonably estimable given the preliminary nature of the proceedings.

State Derivative Lawsuits — California

On February 18, 2016, a purported shareholder derivative action was filed in Los Angeles Superior Court in the State of California against us and certain of our current and former officers and directors under the following caption:  Stesiak v. Jamison, et al., No. BC610782.  The lawsuit alleges that certain of our current and former officers and directors knew or should have known that BPC would be unable to fulfill its obligations to us, but allowed us to make false and misleading statements regarding BPC and our financial condition.  The complaint also alleges that the defendants failed to timely adjust our account receivables and backlog to reflect BPC’s inability to pay us.  The complaint asserts causes of action for breach of fiduciary duty and unjust enrichment.  It demands damages for the amount of damage sustained by us as a result of the individual defendants’ alleged breach of fiduciary duties and unjust enrichment, that we institute corporate governance reforms, and disgorgement from the individual defendants.  On May 5, 2016, the parties filed a stipulation and proposed order seeking to stay this action until such time as the defendants’ motion(s) to dismiss the federal securities class action are either granted with prejudice or denied in whole or in part.  On May 10, 2016, the Court entered that proposed order. Given that the federal securities class action was dismissed with leave to amend, this case is still stayed. A status conference is scheduled for January 2, 2018.

On June 8, 2016, a purported shareholder derivative action entitled Velma Kilpatrick v. Simon, et al., No. BC623167, was filed in Los Angeles Superior Court in the State of California against us and certain of our current and former officers and directors.  The complaint alleges that certain of our current and former officers and directors knew or should have known that BPC would be unable to fulfill its obligations to us, but allowed us to make false and misleading statements regarding BPC and our financial condition.  The complaint also alleges that the defendants failed to timely adjust our account receivables and backlog to reflect BPC’s inability to pay us.  The complaint asserts causes of action for breach of fiduciary duty.  It demands damages for the amount of damage sustained by us as a result of the individual defendants’ alleged breach of fiduciary duties, and that we institute corporate governance reforms. On August 23, 2016, the parties filed a stipulation and proposed order seeking to stay this action until such time as the defendants’ motion(s) to dismiss the federal securities class action are either granted with prejudice or denied in whole or in part.  Given that the federal securities class action was dismissed with leave to amend, this case is still stayed. A status conference is scheduled for December 1, 2017.

On December 27, 2016, a purported shareholder derivative action entitled Andre Rosowsky v. Jamison, et al., No. 30-2016-00894859-CU-MC-CJC was filed in Orange County Superior Court in the State of California against us and certain of our current and former officers and directors. The complaint alleges that certain of our current and former officers and directors knew or should have known that BPC would be unable to fulfill its obligations to us, but allowed us to make false and misleading statements regarding BPC and our financial condition.  The complaint also alleges that the defendants failed to timely adjust our account receivables and backlog to reflect BPC’s inability to pay us.  The complaint asserts causes of action for breach of fiduciary duty and unjust enrichment.  It demands damages for the amount of damage sustained by us as a result of the individual defendants’ alleged breach of fiduciary duties, that we institute corporate governance reforms, and restitution from the individual defendants. On April 14, 2017, the case was removed to the United States District Court for the Central District of California. On May 5, 2017, the plaintiff voluntarily dismissed his complaint without prejudice.

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Federal Derivative Lawsuits

On March 7, 2016, a purported shareholder derivative action was filed in the United States District Court for the Central District of California against us and certain of our current and former officers and directors under the following caption:  Haber v. Jamison, et al., No. CV16-01569-DMG (RAOx).  The lawsuit alleges that certain of our current and former officers and directors knew or should have known that BPC would be unable to fulfill its obligations to us, but allowed us to make false and misleading statements regarding BPC and our financial condition.  The complaint asserts a cause of action for breach of fiduciary duty.  It demands damages for the amount of damage sustained by us as a result of the individual defendants’ alleged breach of fiduciary duties, and equitable relief, including that we institute appropriate corporate governance reforms.  On May 11, 2016, the parties filed a stipulation and proposed order seeking to stay this action until such time as the defendants’ motion(s) to dismiss the federal securities class action are either granted with prejudice or denied in whole or in part. On May 13, 2016, the Court entered that proposed order.  Given that the federal securities class action was dismissed with leave to amend, this case is still stayed.

On July 12, 2016 and July 18, 2016, respectively, two additional purported shareholder derivative actions were filed in the United States District Court for the Central District of California against us and certain of our current and former officers and directors, under the caption Tuttle v. Atkinson, et al., No. CV16-05127, and Boll v. Jamison, et al., No. CV16-5282, respectively.  The lawsuits allege that certain of our current and former officers and directors knew or should have known that BPC would be unable to fulfill its obligations to us, but allowed us to make false and misleading statements regarding BPC and our financial condition.  The Tuttle complaint asserts causes of action for breach of fiduciary duty, gross mismanagement, and unjust enrichment, and the Boll complaint asserts causes of action for breach of fiduciary duty, unjust enrichment, abuse of control, gross mismanagement, and waste of corporate assets.  Both complaints demand damages sustained by us as a result of the individual defendants’ alleged breaches of fiduciary duties, and equitable relief, including that we institute appropriate corporate governance reforms. The federal derivative actions have been stayed until such time as the defendants’ motion(s) to dismiss the federal securities class action are either granted with prejudice or denied in whole or in part. Given that the federal securities class action was dismissed with leave to amend, these cases are still stayed.

Shareholder Demand

Following the dismissal without prejudice of his purported shareholder derivative action discussed above, former plaintiff in Andre Rosowsky v. Jamison, et al. sent us a letter dated July 7, 2017 (the “Shareholder Demand”) demanding that the Board of Directors take action to remedy purported breaches of fiduciary duties allegedly related to the claims asserted in the above-discussed securities class action and derivative actions. We acknowledged the Shareholder Demand on July 25, 2017. Our Board of Directors has formed a committee to evaluate the Shareholder Demand.

Item 1A.  Risk Factors

There have been no material changes to the risk factors disclosed in our Annual Report on Form 10-K for Fiscal 2017 except for the revision of the risk factor set forth below:

Our products involve a lengthy sales cycle, and we may not anticipate sales levels appropriately, which could impair our results of operations.

The sale of our products typically involves a significant commitment of capital by customers, which can result in the typical delays associated with large capital expenditures. For these and other reasons, the sales cycle associated with our products is typically lengthy and subject to a number of significant risks over which we have little or no control. We plan our production and inventory levels based on internal forecasts of customer demand, which is highly unpredictable and can fluctuate substantially. If sales in any period fall significantly below anticipated levels, our financial condition, results of operations and cash flow would suffer. If demand in any period increases well above anticipated levels, we may have difficulties in responding, incur greater costs to respond, or be unable to fulfill the demand in sufficient time to retain the order, which would negatively impact our operations. In addition, our operating expenses are based on anticipated sales levels, and a high percentage of our expenses are generally fixed in the short term. As a result of these factors, a small fluctuation in timing of sales can cause operating results to vary materially from period to period.

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Net product orders for Fiscal 2017 were $43.8 million and contributed to an ending backlog of $113.0 million at March 31, 2017. The book-to-bill ratio was 1.1:1 for Fiscal 2017. Book-to-bill ratio is the ratio of new orders we received to units shipped and billed during a period. However, because our backlog represents only the estimated amount of future product revenue to be recognized under negotiated contracts as shipments convert backlog to recognized revenue for accounting purposes, we may not be able to fully realize the revenue value reported in our backlog, and our backlog may not be indicative of future revenues. A portion of our backlog is concentrated in the international oil and gas market which may impact the overall timing of shipments or the conversion of backlog to revenue. The timing of the backlog is based on the requirement date indicated by our customers. Based on historical experience, management expects that a significant portion of our backlog may not be shipped within the next 18 months. The timing of shipments is subject to change based on several variables (including customer deposits, payments, availability of credit and customer delivery schedule changes), most of which are not in our control and can affect the timing of our revenue. As a result, management believes the book-to-bill ratio demonstrates the current demand for our products in the given period.

During the second quarter of our fiscal year ended March 31, 2016, we removed approximately $51.6 million, for 186 units, representing 63.8 megawatts, of backlog from BPC Engineering, one of our Russian distributors. This removal aligned the backlog to our management’s expectations based on the global macroeconomic environment during our fiscal year ended March 31, 2015, such as the volatility of the global oil and gas market, a strong U.S. dollar (making our products more expensive overseas) and on-going geopolitical tensions involving Russia. In addition, we removed a portion of our TA100 backlog of approximately $2.4 million, for 17 units representing 1.7 megawatts, from Calnetix Power Solutions, Inc. during the first quarter of our fiscal year ended March 31, 2016. This removal aligned our TA100 backlog with our management’s decision to limit future production of TA100 systems.

During the second quarter of fiscal year ended March 31, 2018, we granted Turbine International, LLC and its affiliate, MTE Service, the sole distribution rights for Capstone products and services in the Russian oil and gas sector in exchange for approximately $6.3 million in cash. As a result, the remaining backlog related to BPC Engineering, one of our Russian distributors, may be negatively impacted. Backlog related to BPC Engineering comprises up to approximately 44% of our total backlog.

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

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Exhibit Number	Description
3.1	Second Amended and Restated Certificate of Incorporation of Capstone Turbine Corporation (a)
3.2	Certificate of Amendment to the Second Amended and Restated Certificate of Incorporation of Capstone Turbine Corporation, filed August 30, 2012 (b)
3.3	Certificate of Amendment to the Second Amended and Restated Certificate of Incorporation of Capstone Turbine Corporation, filed November 6, 2015 (c)
3.4	Fourth Amended and Restated Bylaws of Capstone Turbine Corporation (d)
4.1	Form of Warrant Exercise Agreement, dated October 26, 2017 (e)
10.1	Capstone Turbine Corporation 2017 Equity Incentive Plan (f)
10.2	Capstone Turbine Corporation Amended and Restated Employee Stock Purchase Plan (g)
10.3	Accounts Receivable Assignment Agreement between Capstone Turbine Corporation and Turbine International, LLC, dated October 13, 2017 (h)
10.4	Promissory Note between Capstone Turbine Corporation and Turbine International, LLC, dated October 13, 2017 (h)
10.5	Guaranty between Capstone Turbine Corporation and Hispania Petroleum, S.A., dated October 13, 2017 (h)
31.1	Certification of Chief Executive Officer pursuant to Section 302 of the Sarbanes—Oxley Act of 2002
31.2	Certification of Chief Financial Officer pursuant to Section 302 of the Sarbanes—Oxley Act of 2002
32	Certification of Chief Executive Officer and Chief Financial Officer pursuant to Section 906 of the Sarbanes—Oxley Act of 2002
101.INS	XBRL Instance Document
101.SCH	XBRL Schema Document
101.CAL	XBRL Calculation Linkbase Document
101.LAB	XBRL Label Linkbase Document
101.PRE	XBRL Presentation Linkbase Document
101.DEF	XBRL Definition Linkbase Document

(a)Incorporated by reference to Capstone Turbine Corporation’s Registration Statement on Form S-1/A, dated May 8, 2000 (File No. 333-33024)

(b)Incorporated by reference to Appendix B to Capstone Turbine Corporation’s Definitive Proxy Statement, filed on July 17, 2012 (File No. 001-15957)

(c)Incorporated by reference to Capstone Turbine Corporation’s Current Report on Form 8-K, filed on November 6, 2015 (File No. 001-15957)

(d)Incorporated by reference to Capstone Turbine Corporation’s Current Report on Form 8-K, filed on September 1, 2017 (File No. 001-15957)

(e)Incorporated by reference to Capstone Turbine Corporation’s Current Report on Form 8-K on filed on October 27, 2017 (File No. 001-15957)

(f)Incorporated by reference to Appendix A to Capstone Turbine Corporation’s Definitive Proxy Statement, filed on July 21, 2017 (File No. 001-15957)

(g)Incorporated by reference to Appendix B to Capstone Turbine Corporation’s Definitive Proxy Statement, filed on July 21, 2017 (File No. 001-15957)

(h) Incorporated by reference to Appendix B to Capstone Turbine Corporation’s Current Report on Form 8-K, filed on October 19, 2017 (File No. 001-15957)

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SIGNATURES

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

	CAPSTONE TURBINE CORPORATION
	By:	/s/ JAYME L. BROOKS
		Jayme L. Brooks
		Chief Financial Officer & Chief Accounting Officer
		(Principal Financial and Accounting Officer)
Date: November 2, 2017

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EX-31.1

Exhibit 31.1

CERTIFICATION OF THE CHIEF EXECUTIVE OFFICER

I, Darren R. Jamison, certify that:

1.     I have reviewed this quarterly report on Form 10-Q of Capstone Turbine 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  that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

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

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

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

Date: November 2, 2017	By:	/s/ DARREN R. JAMISON
		Darren R. Jamison
		President and Chief Executive Officer

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EX-31.2

Exhibit 31.2

CERTIFICATION OF THE CHIEF FINANCIAL OFFICER

I, Jayme L. Brooks, certify that:

1.     I have reviewed this quarterly report on Form 10-Q of Capstone Turbine 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 that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

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

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

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

Date: November 2, 2017	By:	/s/ JAYME L. BROOKS
		Jayme L. Brooks
		Chief Financial Officer

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EX-32

Exhibit 32

CERTIFICATION OF THE CHIEF EXECUTIVE OFFICER AND THE CHIEF FINANCIAL OFFICER

In connection with the quarterly report of Capstone Turbine Corporation (the “Company”) on Form 10-Q for the quarter ended September 30, 2017, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), Darren R. Jamison, as Chief Executive Officer of the Company, and Jayme L. Brooks, as Chief Financial Officer of the Company, each hereby certifies, pursuant to 18 U.S.C. Sec. 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

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.

	By:	/s/ DARREN R. JAMISON
		Darren R. Jamison
		President and Chief Executive Officer
	By:	/s/ JAYME L. BROOKS
		Jayme L. Brooks
		Chief Financial Officer
Date: November 2, 2017

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Document and Entity Information - shares	6 Months Ended
	Sep. 30, 2017	Oct. 27, 2017
Document and Entity Information
Entity Registrant Name	CAPSTONE TURBINE Corp
Entity Central Index Key	0001009759
Document Type	10-Q
Document Period End Date	Sep. 30, 2017
Amendment Flag	false
Current Fiscal Year End Date	--03-31
Entity Current Reporting Status	Yes
Entity Filer Category	Smaller Reporting Company
Entity Common Stock, Shares Outstanding		46,742,619
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q2

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CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2017	Mar. 31, 2017
Current Assets:
Cash and cash equivalents	$ 10,156	$ 14,191
Restricted cash	5,000	5,514
Accounts receivable, net of allowances of $6,773 at September 30, 2017 and $6,845 at March 31, 2017	13,248	17,003
Inventories	16,274	14,538
Prepaid expenses and other current assets	2,545	3,073
Total current assets	47,223	54,319
Property, plant and equipment, net	2,232	2,115
Non-current portion of inventories	994	961
Intangible assets, net	523	651
Other assets	331	225
Total assets	51,303	58,271
Current Liabilities:
Accounts payable and accrued expenses	14,096	14,719
Accrued salaries and wages	1,834	1,819
Accrued warranty reserve	2,562	3,766
Deferred revenue	4,999	5,050
Revolving credit facility	9,575	11,533
Current portion of notes payable and capital lease obligations	14	302
Total current liabilities	33,080	37,189
Long-term portion of notes payable and capital lease obligations	20	26
Other long-term liabilities	136	158
Total liabilities	33,236	37,373
Commitments and contingencies (Note 15)
Stockholders' Equity:
Preferred stock, $.001 par value; 10,000,000 shares authorized; none issued
Common stock, $.001 par value; 515,000,000 shares authorized, 44,959,744 shares issued and 44,813,869 shares outstanding at September 30, 2017; 38,920,174 shares issued and 38,803,630 shares outstanding at March 31, 2017	45	39
Additional paid-in capital	879,639	874,697
Accumulated deficit	(859,959)	(852,199)
Treasury stock, at cost; 145,875 shares at September 30, 2017 and 116,544 shares at March 31, 2017	(1,658)	(1,639)
Total stockholders' equity	18,067	20,898
Total liabilities and stockholders' equity	$ 51,303	$ 58,271

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CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2017	Mar. 31, 2017
CONDENSED CONSOLIDATED BALANCE SHEETS
Accounts receivable, allowances (in dollars)	$ 6,773	$ 6,845
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized	515,000,000	515,000,000
Common stock, shares issued	44,959,744	38,920,174
Common stock, shares outstanding	44,813,869	38,803,630
Treasury stock, shares	145,875	116,544

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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Revenue:
Product, accessories and parts	$ 16,005	$ 11,518	$ 31,496	$ 27,301
Service	3,769	3,480	7,518	6,762
Total revenue	19,774	14,998	39,014	34,063
Cost of goods sold:
Product, accessories and parts	13,549	11,341	27,586	24,978
Service	3,209	2,987	6,173	5,416
Total cost of goods sold	16,758	14,328	33,759	30,394
Gross margin	3,016	670	5,255	3,669
Operating expenses:
Research and development	1,139	1,350	2,288	2,972
Selling, general and administrative	4,796	5,036	9,757	10,782
Total operating expenses	5,935	6,386	12,045	13,754
Loss from operations	(2,919)	(5,716)	(6,790)	(10,085)
Other income (expense)	14	(27)	4	(43)
Interest income		7	9	12
Interest expense	(98)	(129)	(319)	(263)
Change in warrant valuation	(657)		(657)
Loss before income taxes	(3,660)	(5,865)	(7,753)	(10,379)
Provision for income taxes	7		7	3
Net loss	$ (3,667)	$ (5,865)	$ (7,760)	$ (10,382)
Net loss per common share-basic and diluted (in dollars per share)	$ (0.09)	$ (0.19)	$ (0.18)	$ (0.36)
Weighted average shares used to calculate basic and diluted net loss per common share (in shares)	42,941	30,498	42,606	28,843

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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	6 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash Flows from Operating Activities:
Net loss	$ (7,760,000)	$ (10,382,000)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	583,000	802,000
Amortization of deferred financing costs	133,000	86,000
Reduction in accounts receivable allowances	(22,000)	(1,396,000)
Inventory provision	590,000	483,000
Provision for warranty expenses	995,000	775,000
Loss on disposal of equipment	26,000	170,000
Stock-based compensation	307,000	479,000
Change in warrant valuation	657,000
Changes in operating assets and liabilities:
Accounts receivable	3,778,000	2,221,000
Inventories	(2,360,000)	(1,442,000)
Prepaid expenses and other current assets	266,000	322,000
Accounts payable and accrued expenses	(790,000)	(1,156,000)
Accrued salaries and wages and long term liabilities	(7,000)	(55,000)
Accrued warranty reserve	(2,199,000)	(1,087,000)
Deferred revenue	(49,000)	153,000
Net cash used in operating activities	(5,852,000)	(10,027,000)
Cash Flows from Investing Activities:
Expenditures for property and equipment	(521,000)	(84,000)
Net cash used in investing activities	(521,000)	(84,000)
Cash Flows from Financing Activities:
Net repayments of revolving credit facility	(1,958,000)	(3,281,000)
Repayment of notes payable and capital lease obligations	(183,000)	(298,000)
Cash used in employee stock-based transactions	(22,000)	(17,000)
Net proceeds from issuance of common stock and warrants	3,987,000	13,113,000
Net cash provided by financing activities	1,824,000	9,517,000
Net decrease in Cash, Cash Equivalents and Restricted Cash	(4,549,000)	(594,000)
Cash, Cash Equivalents and Restricted Cash, Beginning of Period	19,705,000	16,706,000
Cash, Cash Equivalents and Restricted Cash, End of Period	15,156,000	16,112,000
Cash paid during the period for:
Interest	205,000	87,000
Income taxes	7,000
Supplemental Disclosures of Non-Cash Information:
Acquisition of property and equipment through accounts payable	$ 99,000	$ 27,000

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Business and Organization

6 Months Ended

Sep. 30, 2017

Business and Organization

Business and Organization

1.  Business and Organization

Capstone Turbine Corporation (the “Company”) develops, manufactures, markets and services microturbine technology solutions for use in stationary distributed power generation applications, including cogeneration (combined heat and power (“CHP”), integrated combined heat and power (“ICHP”), and combined cooling, heat and power (“CCHP”)), renewable energy, natural resources, critical power supply, transportation and marine. In addition, the Company’s microturbines can be used as battery charging generators for hybrid electric vehicle applications. The Company was organized in 1988 and has been commercially producing its microturbine generators since 1998.

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Basis of Presentation

6 Months Ended

Sep. 30, 2017

Basis of Presentation

Basis of Presentation

2.  Basis of Presentation

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“generally accepted accounting principles” or “GAAP”) for interim financial information and the instructions to Form 10-Q and Regulation S-X promulgated under the Securities Exchange Act of 1934, as amended (the “Exchange Act”). They do not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements. The condensed consolidated balance sheet at March 31, 2017 was derived from audited financial statements included in the Company’s Annual Report on Form 10-K for the year ended March 31, 2017. In the opinion of management, the interim condensed consolidated financial statements include all adjustments (including normal recurring adjustments) necessary for a fair presentation of the financial condition, results of operations and cash flows for such periods. Results of operations for any interim period are not necessarily indicative of results for any other interim period or for the full year. These condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the year ended March 31, 2017. This Quarterly Report on Form 10-Q (this “Form 10-Q”) refers to the Company’s fiscal years ending March 31 as its “Fiscal” years.

Evaluation of Ability to Maintain Current Level of Operations In connection with preparing the consolidated financial statements for the second quarter of Fiscal 2018, management evaluated whether there were conditions and events, considered in the aggregate, that raised substantial doubt about the Company’s ability to meet its obligations as they became due for the next twelve months from the date of issuance of its second quarter of Fiscal 2018 financial statements. Management assessed that there were such conditions and events, including a history of recurring operating losses, negative cash flows from operating activities, the continued negative impact caused by the volatility of the global oil and gas markets, a strong U.S. dollar (making our products more expensive overseas) and ongoing geopolitical tensions in Russia, North Africa and the Middle East. Cash used for working capital during the second quarter of Fiscal 2018 was higher than planned, primarily as a result of higher finished goods inventory. Additionally, the Company did not fully achieve its planned number of product shipments during the second quarter of Fiscal 2018, resulting in lower than expected revenue. The Company incurred a net loss of $3.7 million and used cash in operating activities of $5.1 million for the second quarter of Fiscal 2018. As of September 30, 2017, the Company had cash, cash equivalents and restricted cash of $15.2 million, and outstanding borrowings under its credit facility of $9.6 million.

Management evaluated these conditions in relation to the Company’s ability to meet its obligations as they become due. The Company’s ability to continue current operations and to execute on management’s plans is dependent on its ability to generate cash flows from operations. Management believes that the Company will continue to make progress on its path to profitability by continuing to lower its operating costs and to develop its geographical and vertical markets.  The Company may seek to raise funds by selling additional securities (through the at-the-market offering or otherwise) to the public or to selected investors or by obtaining additional debt financing. There is no assurance that the Company will be able to obtain additional funds on commercially favorable terms or at all. If the Company raises additional funds by issuing additional equity or convertible debt securities, the fully diluted ownership percentages of existing stockholders will be reduced. In addition, any equity or debt securities that the Company would issue may have rights, preferences or privileges senior to those of the holders of its common stock. 

On June 2, 2017, the Company, entered into two secured credit facilities (the “Bridge Bank Credit Agreements”) with Western Alliance Bank through its Bridge Bank division (“Bridge Bank”), with credit support provided by the Export-Import Bank of the United States through its working capital guarantee program. Under the terms of the Bridge Bank Credit Agreements, the Company may borrow up to $12.0 million on a revolving basis depending on, among other factors, the amount of its eligible inventory and accounts receivable. The Bridge Bank Credit Agreements are for a two-year period ending June 2, 2019. See Note 11—Revolving Credit Facility, for discussion of the credit facilities with Bridge Bank.

The Company maintained two Credit and Security Agreements, with Wells Fargo Bank, National Association (“Wells Fargo”), which provided the Company with a credit facility up to $20.0 million in the aggregate. Upon closing with Bridge Bank, the Company’s existing credit facilities with Wells Fargo, were paid off in full.

Based on the Company’s current operating plan, management anticipates that, given current working capital levels, current financial projections, the ability to borrow under its credit facility with Bridge Bank, net proceeds from exercise of Series A warrants and the funds expected to be received from the new oil and gas sector distributor in Russia, the Company will be able to meet its financial obligations as they become due over the next twelve months from the date of issuance of its second quarter of Fiscal 2018 financial statements. See Note 17— Subsequent Events, for discussion with respect to the exercise of Series A warrants and new Russian distributor.

The consolidated financial statements include the accounts of the Company, Capstone Turbine International, Inc., its wholly owned subsidiary that was formed in June 2004 and Capstone Turbine Financial Services, LLC, its wholly owned subsidiary that was formed in October 2015, after elimination of inter-company transactions.

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Recently Issued Accounting Standards

6 Months Ended

Sep. 30, 2017

Recently Issued Accounting Standards

Recently Issued Accounting Standards

3.  Recently Issued Accounting Standards

In July 2017, the Financial Accounting Standards Board (“FASB”) issued a two-part Accounting Standards Update (“ASU”) No. 2017-11, I. Accounting for Certain Financial Instruments With Down Round Features and II. Replacement of the Indefinite Deferral for Mandatorily Redeemable Financial Instruments of Certain Nonpublic Entities and Certain Mandatorily Redeemable Noncontrolling Interests With a Scope Exception (“ASU 2017-11”). ASU 2017-11 amends guidance in FASB ASC 260, Earnings Per Share, FASB ASC 480, Distinguishing Liabilities from Equity, and FASB ASC 815, Derivatives and Hedging. The amendments in Part I of ASU 2017-11 change the classification analysis of certain equity-linked financial instruments (or embedded features) with down round features. The amendments in Part II of ASU 2017-11 re-characterize the indefinite deferral of certain provisions of Topic 480 that now are presented as pending content in the Codification, to a scope exception. Those amendments do not have an accounting effect. ASU 2017-11 is effective for public business entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. Early adoption is permitted. The Company adopted ASU 2017-11 for the three months ended June 30, 2017, and retrospectively applied ASU 2017-11 as required. See Note 10—Fair Value Measurements for further discussion on changes as a result of the adoption of ASU 2017-11.

In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842), (“ASU 2016-02”). The purpose of ASU 2016-02 is to provide financial statement users a better understanding of the amount, timing, and uncertainty of cash flows arising from leases. The adoption of ASU 2016-02 will result in the recognition of a right-of-use asset and a lease liability for most operating leases. New disclosure requirements include qualitative and quantitative information about the amounts recorded in the financial statements. In September 2017, the FASB issued ASU 2017-13, Revenue Recognition (Topic 605), Revenue from Contracts with Customers (Topic 606), Leases (Topic 840), and Leases (Topic 842), which provides additional implementation guidance on the previously issued ASU 2016-02 Leases (Topic 842). ASU 2016-02 requires a lessee to recognize assets and liabilities on the balance sheet for leases with lease terms greater than 12 months. ASU 2016-02 is effective for fiscal years beginning after December 15, 2018. ASU 2016-02 requires a modified retrospective transition by means of a cumulative-effect adjustment to retained earnings as of the beginning of the fiscal year in which the guidance is effective with the option to elect certain practical expedients. Early adoption is permitted. The Company is currently evaluating the impact of ASU 2016-02 on its consolidated financial position and results of operations.

In July 2015, the FASB issued ASU 2015-11, Simplifying the Measurement of Inventory (“ASU 2015-11”). ASU 2015-11 requires inventory that is recorded using the first-in, first-out method to be measured at the lower of cost or net realizable value. ASU 2015-11 is effective for annual and interim periods beginning after December 15, 2016, and should be applied prospectively with early adoption permitted at the beginning of an interim or annual reporting period. The Company adopted ASU 2015-11 with no impact on its consolidated financial position or results of operations.

Revenue Recognition Related ASUs:

In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (“ASU 2014-09”). ASU 2014-09 supersedes nearly all existing revenue recognition guidance under GAAP. The standard’s core principle is that a company will recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services.

In August 2015, the FASB issued FASB ASU No. 2015-14, Revenue from Contracts with Customers: Deferral of the Effective Date (“ASU 2014-09”), which deferred the effective date of ASU 2014-09 by one year. ASU 2014-09 is now effective for annual reporting periods beginning after December 15, 2017, including interim periods within that reporting period, using one of two retrospective application methods. Early application is permitted only as of annual reporting periods beginning after December 15, 2016, including interim reporting periods within that reporting period.

In March 2016, the FASB issued FASB ASU No. 2016-08, Revenue from Contracts with Customers: Principal versus Agent Considerations (“ASU 2016-08”). ASU 2016-08 clarifies the implementation guidance on principal versus agent considerations.

In April 2016, the FASB issued ASU No. 2016-10, Revenue from Contracts with Customers: Identifying Performance Obligations and Licensing (“ASU 2016-10”). ASU 2016-10 clarifies the implementation guidance for identifying performance obligations and determining when to recognize revenue on licensing agreements for intellectual property.

In May 2016, the FASB issued ASU No. 2016-11, Revenue Recognition and Derivatives and Hedging: Rescission of SEC Guidance Because of ASU 2014-09 and ASU 2014-16 Pursuant to Staff Announcements at the March 3, 2016 EITF Meeting (“ASU 2016-11”). ASU 2016-11 rescinds certain SEC staff comments previously made in regard to these ASU’s.

In May 2016, the FASB issued ASU No. 2016-12, Revenue from Contracts with Customers: Narrow-Scope Improvements and Practical Expedients (“ASU 2016-12”) that provide guidance on assessing collectability, presentation of sales taxes, noncash consideration, and completed contracts and contract modifications at transition.

In December 2016, the FASB issued ASU 2016-20, Technical Corrections and Improvements to ASU 2014-09. The amendments in ASU 2014-09 affect narrow aspects of the guidance in ASU 2014-09, which is not yet effective. The amendments in ASU 2014-09 address loan guarantee fees, impairment testing of contract costs, provisions for losses on construction-type and production-type contracts, and various disclosures.

In September 2017, the FASB issued ASU 2017-13, “Revenue Recognition (Topic 605), Revenue from Contracts with Customers (Topic 606), Leases (Topic 840), and Leases (Topic 842): Amendments to SEC Paragraphs Pursuant to the Staff Announcement at the July 20, 2017 EITF Meeting and Rescission of Prior SEC Staff Announcements and Observer Comments”(“ASU 2017-13”) The amendments in ASU 2017-13 amends the early adoption date option for certain companies related to the adoption of ASU 2014-09 and ASU 2016-02.

The Company is evaluating its existing revenue recognition policies and the impact of ASU 2014-09, ASU 2015-14, ASU 2016-08, ASU 2016- 10, ASU 2016-11, ASU 2016-12 and ASU 2016-20, if any, on its financial position and results of operations. The effective date and transition requirements for the amendments are the same as the effective date and transition requirements for ASU 2014-09. The Company will be required to adopt the revenue recognition standard in annual reporting periods beginning after December 15, 2017 (fiscal year ending March 31, 2019) and interim periods within those annual periods.

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Customer Concentrations and Accounts Receivable

6 Months Ended

Sep. 30, 2017

Customer Concentrations and Accounts Receivable

Customer Concentrations and Accounts Receivable

4.  Customer Concentrations and Accounts Receivable

Sales to Reliable Secure Power Systems, (“RSP”), Regatta Solutions, Inc. (“Regatta”) and E-Finity Distributed Generation, LLC (“E-Finity”), three of the Company’s domestic distributors, and Optimal Group Australia Pty Ltd, one of the Company’s Australian distributors and IBT Europe GmbH (“IBT”), one of the Company’s European distributors, accounted for 12%,  11%,  11%,  11% and 10%, respectively, of revenue for the three months ended September 30, 2017. Sales to BPC Engineering (“BPC”), one of the Company’s Russian distributors, accounted for 11% of revenue for the three months ended September 30, 2016. For the six months ended September 30, 2017, E-Finity, Horizon Power Systems (“Horizon”) and Optimal accounted for 13%,  12% and 10% of revenue, respectively. For the six months ended September 30, 2016, Regatta Solutions, Inc. (“Regatta”), one of the Company’s domestic distributors, accounted for 11% of revenue.

Additionally, E-Finity, RSP, Regatta and IBT accounted for 16%,  16%, 13% and 11%, respectively, of net accounts receivable as of September 30, 2017. E-Finity, Dtc Soluciones Inmobiliarias S.A. de C.V. (“DTC”), one of the Company’s Mexican distributors and RSP accounted for 29%,  12% and 10%, respectively, of net accounts receivable as of March 31, 2017.

The Company recorded a net bad debt recovery of approximately $9,000 and $22,000 during the three and six months ended September 30, 2017, respectively. As of September 30, 2017, the Company collected approximately $1.7 million from BPC on their accounts receivable allowance of approximately $8.1 million. The Company recorded net bad debt recovery of approximately $0.5 million for the three months ended September 30, 2016. During the six months ended September 30, 2016, the Company recorded approximately $1.4 million in net bad debt recovery, which was previously reserved during Fiscal 2015, for cash received primarily from BPC and Electro Mecanique Industries, one of the Company’s distributors in the Middle East and Africa.

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Inventories

6 Months Ended

Sep. 30, 2017

Inventories

Inventories

5.  Inventories

Inventories are valued on a first in first out (“FIFO”) basis and lower of cost or net realizable value and consisted of the following as of September 30, 2017 and March 31, 2017 (in thousands):

	September 30,		March 31,
	2017		2017
Raw materials	$	14,436	$	15,035
Work in process		290		—
Finished goods		2,542		464
Total		17,268		15,499
Less non-current portion		(994)		(961)
Current portion	$	16,274	$	14,538

The non-current portion of inventories represents the portion of the inventories in excess of amounts expected to be sold or used in the next twelve months. The non-current inventories are primarily comprised of repair parts for older generation products that are still in operation but are not technologically compatible with current configurations. The weighted average age of the non-current portion of inventories on hand as of September 30, 2017 is 1.6 years. The Company expects to use the non-current portion of the inventories on hand as of September 30, 2017 over the periods presented in the following table (in thousands):

		Non-current Inventory
		Balance Expected
Expected Period of Use		to be Used
13 to 24 months	$	358
25 to 36 months		636
Total	$	994

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Property, Plant and Equipment

6 Months Ended

Sep. 30, 2017

Property, Plant and Equipment

Property, Plant and Equipment

6.  Property, Plant and Equipment

Property, plant and equipment consisted of the following as of September 30, 2017 and March 31, 2017 (in thousands):

	September 30,		March 31,
	2017		2017
Machinery, rental equipment, equipment, automobiles and furniture	$	16,050	$	17,657
Leasehold improvements		9,828		9,870
Molds and tooling		2,929		2,866
		28,807		30,393
Less, accumulated depreciation		(26,575)		(28,278)
Total property, plant and equipment, net	$	2,232	$	2,115

Depreciation expense for property and equipment was $0.2 million and $0.4 million for the three and six months ended September 30, 2017, respectively. The Company recorded depreciation expense of $0.3 million and $0.6 million for the three and six months ended September 30, 2016, respectively.

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Intangible Assets

6 Months Ended

Sep. 30, 2017

Intangible Assets

Intangible Assets

7.  Intangible Assets

Intangible assets consisted of the following as of September 30, 2017 and March 31, 2017 (in thousands):

	September 30, 2017
	Weighted
	Average	Intangible
	Amortization	Assets,		Accumulated		Intangible
	Period	Gross		Amortization		Assets, Net
Manufacturing license	17 years	$	3,700	$	3,700	$	—
Technology	10 years		2,240		1,717		523
Trade name & parts, service and TA100 customer relationships	1.2 to 5 years		1,766		1,766		—
Total		$	7,706	$	7,183	$	523

	March 31, 2017
	Weighted
	Average	Intangible
	Amortization	Assets,		Accumulated		Intangible
	Period	Gross		Amortization		Assets, Net
Manufacturing license	17 years	$	3,700	$	3,684	$	16
Technology	10 years		2,240		1,605		635
Trade name & parts, service and TA100 customer relationships	1.2 to 5 years		1,766		1,766		—
Total		$	7,706	$	7,055	$	651

Amortization expense for the intangible assets was $0.1 million for each of the three and six months ended September 30, 2017 and 2016, respectively.

Expected future amortization expense of intangible assets as of September 30, 2017 is as follows (in thousands):

	Amortization
Year Ending March 31,	Expense
2018 (remainder of fiscal year)		112
2019		224
2020		187
Thereafter		—
Total expected future amortization	$	523

The manufacturing license provides the Company with the ability to manufacture recuperator cores previously purchased from Solar Turbines Incorporated (“Solar”). The Company is required to pay a per-unit royalty fee over a seventeen-year period for cores manufactured and sold by the Company using the technology. Royalties of approximately $7,200 and $6,400 were earned by Solar for the three months ended September 30, 2017 and 2016, respectively. Royalties of approximately $13,700 and $14,700 were earned by Solar for the six months ended September 30, 2017 and 2016, respectively. Earned royalties of approximately $7,200 and $10,000 were unpaid as of September 30, 2017 and March 31, 2017, respectively, and are included in accounts payable and accrued expenses in the accompanying balance sheets.

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Stock-Based Compensation

6 Months Ended

Sep. 30, 2017

Stock-Based Compensation

Stock-Based Compensation

8.  Stock-Based Compensation

The following table summarizes, by statement of operations line item, stock-based compensation expense for the Company’s three and six months ended September 30, 2017 and 2016 (in thousands):

	Three Months Ended				Six Months Ended
	September 30,				September 30,
	2017		2016		2017		2016
Cost of goods sold	$	18	$	14	$	38	$	29
Research and development		5		13		12		16
Selling, general and administrative		130		214		257		434
Stock-based compensation expense	$	153	$	241	$	307	$	479

Stock Plans

2000 Equity Incentive Plan and 2017 Equity Incentive Plan

In June 2000, the Company adopted the 2000 Equity Incentive Plan (the “2000 Plan”). The 2000 Plan provides for a total maximum aggregate number of shares which may be issued of 1,849,000 shares. In June 2017, the Company adopted the Capstone Turbine Corporation 2017 Equity Incentive Plan (the “2017 Plan”) which was approved by the stockholders at the Company’s 2017 annual meeting of stockholders on August 31, 2017. The 2017 Plan provides for awards of up to 3,000,000 shares of common stock. The 2017 Plan is administered by the Compensation Committee designated by the Board of Directors (the “Compensation Committee”). The Compensation Committee’s authority includes determining the number of incentive awards and vesting provisions.

Stock Options

The Company issued stock options under the 2000 Plan and issues stock options under the 2017 Plan to employees, non-employee directors and consultants that vest and become exercisable over a four-year period and expire 10 years after the grant date. The Company uses a Black-Scholes valuation model to estimate the fair value of the options at the grant date, and compensation cost is recorded on a straight-line basis over the vesting period. During the year ended March 31, 2017, the Company established an accounting policy election to assume zero forfeiture for stock options and account for forfeitures when they occur. All options are subject to the following vesting provisions: one-fourth vest one year after the issuance date and 1/48th vest on the first day of each full month thereafter, so that all options will be vested on the first day of the 48th month after the grant date. Information relating to stock options for the Company’s six months ended September 30, 2017 is as follows:

				Weighted-
				Average
		Weighted-		Remaining	Aggregate
		Average		Contractual	Intrinsic
	Shares	Exercise Price		Term	Value
				(in years)
Options outstanding at March 31, 2017	314,537	$	15.48
Granted	—	$	—
Exercised	—	$	—
Forfeited, cancelled or expired	(4,000)	$	24.25
Options outstanding at September 30, 2017	310,537	$	15.37	4.9		—
Options fully vested at September 30, 2017 and those expected to vest beyond September 30, 2017	310,537	$	15.37	4.9		—
Options exercisable at September 30, 2017	245,693	$	18.98	3.9		—

Black-Scholes Model Valuation Assumptions

There were no stock options granted during either the three or six months ended September 30, 2017. The Company calculated the estimated fair value of each stock option granted during the three and six months ended September 30, 2016 on the date of grant using the Black-Scholes option-pricing model and the following weighted-average assumptions:

	Three and Six Months Ended
	September 30, 2016
Risk-free interest rates		1.3	%
Expected lives (in years)		5.7
Dividend yield		—	%
Expected volatility		133.9	%
Weighted average grant date fair value of options granted during the period	$	1.52

The Company’s computation of expected volatility for the three and six months ended September 30, 2016 was based on historical volatility. The expected life, or term, of options granted is derived from historical exercise behavior and represents the period of time that stock option awards are expected to be outstanding. Management has selected a risk-free rate based on the implied yield available on U.S. Treasury Securities with a maturity equivalent to the options’ expected term.  The Company recorded expense of approximately $8,000 and $3,000 associated with its stock options during the three months ended September 30, 2017 and 2016, respectively. The Company recorded expense of approximately $17,000 and $3,000 associated with its stock options during the six months ended September 30, 2017 and 2016, respectively. As of September 30, 2017, there was approximately $0.1 million of total compensation cost related to unvested stock option awards that is expected to be recognized as expense over a weighted average period of 2.9 years.

Restricted Stock Units and Performance Restricted Stock Units

The Company issued restricted stock units under the 2000 Plan and issues restricted stock units under the 2017 Plan to employees, non-employee directors and consultants. The restricted stock units are valued based on the closing price of the Company’s common stock on the date of issuance, and compensation cost is recorded on a straight-line basis over the vesting period. During the fiscal year ended March 31, 2017, the Company established an accounting policy election to assume zero forfeiture for restricted stock units and account for forfeitures when they occur. The restricted stock units vest in equal installments over a period of four years. For restricted stock units with four year vesting, one-fourth vest annually beginning one year after the issuance date. The restricted stock units issued to non-employee directors vest one year after the issuance date. The following table outlines the restricted stock unit and performance restricted stock unit (“PRSU”) activity:

		Weighted
		Average Grant
		Date Fair
Restricted Stock and Performance Restricted Stock Units	Shares	Value
Nonvested restricted stock units outstanding at March 31, 2017	316,709	$	2.85
Granted	474,848		0.64
Vested and issued	(212,924)		2.76
Forfeited	(9,513)		2.49
Nonvested restricted stock units outstanding at September 30, 2017	569,120		1.05
Restricted stock units expected to vest beyond September 30, 2017	569,097	$	1.05

The following table provides additional information on restricted stock units for the three and six months ended September 30, 2017 and 2016:

	Three Months Ended				Six Months Ended
	September 30,				September 30,
	2017		2016		2017		2016
Restricted stock compensation expense (in thousands)	$	144	$	188	$	287	$	375
Aggregate fair value of restricted stock units vested and issued (in thousands)	$	130	$	85	$	137	$	107
Weighted average grant date fair value of restricted stock units granted during the period	$	0.62	$	1.71	$	0.67	$	1.71

As of September 30, 2017, there was approximately $0.5 million of total compensation cost related to unvested restricted stock units that is expected to be recognized as expense over a weighted average period of 1.2 years.

Restricted Stock Awards

The Company issued restricted stock awards under the 2000 Plan and issues restricted stock awards under the 2017 Plan to employees and non-employee directors. During the three and six months ended September 30, 2017 and 2016 the Company granted stock awards to non-employee directors who elected to take payment of all or any part of the directors’ fees in stock in lieu of cash. The following table outlines the restricted stock award activity for the three and six months ended September 30, 2017 and 2016:

	Three Months Ended				Six Months Ended
	September 30,				September 30,
	2017		2016		2017		2016
Restricted stock awards compensation expense (in thousands)	$	1	$	50	$	3	$	101
Restricted stock awards granted		1,953		29,910		3,969		62,111
Weighted average grant date fair value of restricted stock awards granted during the period	$	0.64	$	1.69	$	0.63	$	1.63

For each term of the Board of Directors (beginning on the date of an annual meeting of stockholders and ending on the date immediately preceding the next annual meeting of stockholders), a non-employee director may elect to receive a stock award in lieu of all or any portion of their annual retainer or committee fee cash payment. The shares of stock were valued based on the closing price of the Company’s common stock on the date of grant.

Employee Stock Purchase Plan

In June 2000, the Company adopted the Employee Stock Purchase Plan (the “ESPP”). The ESPP provides for the granting of rights to purchase common stock to regular full and part-time employees or officers of the Company and its subsidiaries. In June 2017, the Board of Directors unanimously approved an amendment and restatement to the ESPP which was approved by the stockholders at the Company’s annual meeting of stockholders on August 31, 2017. Prior to the current amendment, 70,000 shares of the Company’s common stock had been reserved for issuance. As amended, the ESPP will continue by its terms and will increase the number of shares of the Company’s common stock available by 500,000 shares which will reserve for issuance a total of 570,000 shares of common stock. Under the ESPP, shares of the Company’s common stock will be issued upon exercise of the purchase rights. The ESPP will continue by its terms through June 30, 2020, unless terminated sooner.

Grants outside of 2000 Plan and 2017 Plan

As of September 30, 2017, the Company had outstanding 88,930 non-qualified common stock options and 11,115 restricted stock units issued outside of the 2017 Plan. The Company granted these stock options and restricted stock units during the three months ended September 30, 2016 as inducement grants to the new Vice President, Manufacturing of the Company, with exercise prices or values, as applicable, based on the fair market value of the Company’s common stock on the grant date.

Although the options and restricted stock units were not granted under the 2000 Plan and 2017 Plan, they are governed by terms and conditions identical to those under the 2000 Plan and 2017 Plan. All options are subject to the following vesting provisions: one-fourth vest one year after the issuance date and 1/48th vest on the first day of each full month thereafter, so that all options will be vested on the first day of the 48th month after the grant date. All outstanding options have a contractual term of ten years. The restricted stock units vest in equal installments over a period of four years.

Stockholder Rights Plan

On May 6, 2016, the Company entered into Amendment No. 5 (the “Amendment”) to the Rights Agreement, dated as of July 7, 2005, as amended by Amendment No. 1, dated as of July 3, 2008, Amendment No. 2, dated as of June 9, 2011, Amendment No. 3, dated as of July 1, 2014 and Amendment No. 4, dated as of August 5, 2014, (the “Original Rights Agreement”) between the Company and Computershare Inc. 

The Amendment accelerated the expiration of the Company’s preferred share purchase rights (the “Original Rights”) from 5:00 p.m., California time, on the 30th day after the Company’s 2017 annual meeting of stockholders to 5:00 p.m., California time, on May 6, 2016, and had the effect of terminating the Original Rights Agreement on that date. At the time of the termination of the Original Rights Agreement, all of the Original Rights distributed to holders of the Company’s common stock pursuant to the Original Rights Agreement expired.

On May 6, 2016, the Company entered into a rights agreement (the “NOL Rights Agreement”) with Computershare Inc., as rights agent. In connection with the NOL Rights Agreement, the Company’s Board of Directors authorized and declared a dividend distribution of one preferred stock purchase right (a “New Right”) for each share of the Company’s common stock authorized and outstanding. Each New Right entitles the registered holder to purchase from the Company a unit consisting of one one-thousandth of a share of Series B Junior Participating Preferred Stock, par value $0.001 per share, at a purchase price of $8.76 per unit, subject to adjustment. The description and terms of the New Rights are set forth in the NOL Rights Agreement.

The purpose of the NOL Rights Agreement is to diminish the risk that the Company’s ability to use its net operating losses and certain other tax assets (collectively, “Tax Benefits”) to reduce potential future federal income tax obligations would become subject to limitations by reason of the Company’s experiencing an “ownership change,” as defined in Section 382 of the Internal Revenue Code of 1986. A company generally experiences such an ownership change if the percentage of its stock owned by its “5-percent shareholders,” as defined in Section 382 of the Internal Revenue Code of 1986, increases by more than 50 percentage points over a rolling three-year period. The NOL Rights Agreement is designed to reduce the likelihood that the Company will experience an ownership change under Section 382 of the Internal Revenue Code of 1986 by (i) discouraging any person or group from becoming a 4.99% shareholder and (ii) discouraging any existing 4.99% shareholder from acquiring additional shares of the Company’s stock.

The New Rights will not be exercisable until the earlier to occur of (i) the close of business on the tenth business day after a public announcement or filing that a person has, or group of affiliated or associated persons or persons acting in concert have, become an “Acquiring Person,” which is defined as a person or group of affiliated or associated persons or persons acting in concert who, at any time after the date of the NOL Rights Agreement, have acquired, or obtained the right to acquire, beneficial ownership of 4.99% or more of the Company’s outstanding shares of common stock, subject to certain exceptions or (ii) the close of business on the tenth business day after the commencement of, or announcement of an intention to commence, a tender offer or exchange offer the consummation of which would result in any person becoming an Acquiring Person (the earlier of such dates being called the “Distribution Date”). Certain synthetic interests in securities created by derivative positions, whether or not such interests are considered to be ownership of the underlying common stock or are reportable for purposes of Regulation 13D of the Exchange Act, are treated as beneficial ownership of the number of shares of common stock equivalent to the economic exposure created by the derivative position, to the extent actual shares of the common stock are directly or indirectly held by counterparties to the derivatives contracts.

The New Rights, which are not exercisable until the Distribution Date, will expire prior to the earliest of (i) May 6, 2019 or such later day as may be established by the Board of Directors prior to the expiration of the New Rights, provided that the extension is submitted to the Company’s stockholders for ratification at the next annual meeting of stockholders of the Company succeeding such extension; (ii) the time at which the New Rights are redeemed pursuant to the NOL Rights Agreement; (iii) the time at which the New Rights are exchanged pursuant to the NOL Rights Agreement; (iv) the time at which the New Rights are terminated upon the occurrence of certain transactions; (v) the close of business on the first day after the Company’s 2017 annual meeting of stockholders, if approval by the stockholders of the Company of the NOL Rights Agreement has not been obtained on or prior to the close of business on the first day after the Company’s 2017 annual meeting of stockholders; (vi) the close of business on the effective date of the repeal of Section 382 of the Internal Revenue Code of 1986, if the Board of Directors determines that the NOL Rights Agreement is no longer necessary or desirable for the preservation of Tax Benefits; and (vii) the close of business on the first day of a taxable year of the Company to which the Board of Directors determines that no Tax Benefits are available to be carried forward.

Each share of Series B Junior Participating Preferred Stock will be entitled, when, as and if declared, to a preferential per share quarterly dividend payment equal to the greater of (i) $1.00 per share or (ii) an amount equal to 1,000 times the dividend declared per share of common stock. Each share of Series B Junior Participating Preferred Stock will entitle the holder thereof to 1,000 votes on all matters submitted to a vote of the stockholders of the Company. In the event of any merger, consolidation or other transaction in which shares of common stock are converted or exchanged, each share of Series B Junior Participating Preferred Stock will be entitled to receive 1,000 times the amount received per one share of common stock.

At the Company’s 2017 annual meeting of stockholders on August 31, 2017, the stockholders approved the NOL Rights Agreement, dated as of May 6, 2016, with Computershare Inc.

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Offerings of Common Stock and Warrants and At-the-Market Offering Program

6 Months Ended

Sep. 30, 2017

Offerings of Common Stock and Warrants and At-the-Market Offering Program

Offerings of Common Stock and Warrants and At-the-Market Offering Program

9.   Offerings of Common Stock and Warrants and At-the-Market Offering Program

On October 18, 2016, the Company entered into a securities purchase agreement with certain accredited investors, pursuant to which the Company agreed to sell 3.6 million shares of common stock, pre-funded Series B warrants to purchase up to 2.7 million shares of common stock, and Series A warrants to purchase up to 6.3 million shares of common stock. Pursuant to a placement agent agreement, dated as of October 18, 2016, the Company engaged Oppenheimer & Co. Inc. as the lead placement agent for the offering and ROTH Capital Partners, LLC as co-placement agent for the offering. Each share of common stock was sold at a price of $1.20. Each Series B warrant was issued with an exercise price of $1.20 per share of common stock, $1.19 of which was pre-funded at closing and $0.01 of which is payable upon exercise. Each Series A warrant was issued with an initial exercise price of $1.34 per share of common stock. These Series A warrants contain anti-dilution provisions that reduce the exercise price of the warrants if certain dilutive issuances occur. The anti-dilution provisions of the Series A warrants were approved by the Company’s stockholders at the 2017 annual meeting of stockholders held on August 31, 2017 and exercise price of the warrants was adjusted to $0.65 per share. The value of this down round feature was measured using the Binomial valuation model and resulted in a loss of approximately $0.7 million during the three and six months ended September 30, 2017, respectively. The net proceeds to the Company from this offering, after deducting the placement agent fees and other estimated offering expenses, were approximately $6.8 million. The offering closed on October 21, 2016.

On April 19, 2016, the Company entered into an underwriting agreement with Oppenheimer & Co. Inc. as the sole book-running manager, and Rodman & Renshaw, a unit of H.C. Wainwright & Co., LLC, as the co-manager, related to the public offering of 2.7 million shares of our common stock and pre-funded Series B warrants to purchase up to 5.5 million shares of common stock, which were offered in lieu of common stock to those purchasers whose purchase of common stock in the offering otherwise would result in the purchaser beneficially owning more than 4.99% of the Company’s outstanding common stock following the completion of the offering. Also included in the offering were Series A warrants to purchase 4.1 million shares of common stock. Every two shares of common stock were sold with one Series A warrant to purchase one share of common stock at a collective negotiated price of $3.50. Every two Series B warrants were sold with one Series A warrant to purchase one share of common stock at a collective negotiated price of $3.48. The Series A warrants are exercisable, subject to certain limitations, during the period commencing six months after the date of the issuance and expire five years after the first day they are exercisable. The pre-funded Series B warrants were exercisable, subject to certain limitations, upon issuance and expire nine months from the date of issuance, subject to extension under certain circumstances. The net proceeds to the Company from the sale of the common stock and warrants, after deducting fees and other offering expenses, were approximately $13.1 million. The offering closed on April 22, 2016. 

During each of the three and six months ended September 30, 2017, there was no Series A warrant activity and 10,407,500 Series A warrants remained outstanding. During the Fiscal year ended March 31, 2017, all Series B warrants were exercised and there are no Series B warrants outstanding.

Effective August 28, 2015, the Company entered into a sales agreement with respect to an at-the-market offering program pursuant to which the Company may offer and sell, from time to time at its sole discretion, shares of its common stock, having an aggregate offering price of up to $30.0 million. The Company will set the parameters for sales of the shares, including the number to be sold, the time period during which sales are requested to be made, any limitation on the number that may be sold in one trading day and any minimum price below which sales may not be made. During the three months ended September 30, 2017, the Company issued 2.4 million shares of the Company’s common stock under the at-the-market offering program and the net proceeds to the Company from the sale of the Company’s common stock were approximately $1.4 million after deducting commissions paid of approximately $45,000.  During the six months ended September 30, 2017, the Company issued 5.8 million shares of the Company’s common stock under the at-the-market offering program and the net proceeds to the Company from the sale of the Company’s common stock were approximately $4.0 million after deducting commissions paid of approximately $0.1 million. As of September 30, 2017, 13.1 million shares of the Company’s common stock were sold pursuant to the at-the-market offering program and the net proceeds to the Company from the sale of the common stock were approximately $16.8 million after deducting commissions paid of approximately $0.5 million. As of September 30, 2017, approximately $12.2 million remained available for issuance with respect to the at-the-market offering program. These available proceeds are subject to Instruction I.B.6(a) to Form S-3 often referred to as the “Baby Shelf Rules.”

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Fair Value Measurements

6 Months Ended

Sep. 30, 2017

Fair Value Measurements

Fair Value Measurements

10.  Fair Value Measurements

The FASB has established a framework for measuring fair value using generally accepted accounting principles. That framework provides a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (level 1 measurements) and the lowest priority to unobservable inputs (level 3 measurements). The three levels of the fair value hierarchy are described as follows:

Level 1.  Inputs to the valuation methodology are unadjusted quoted prices for identical assets or liabilities in active markets.

Level 2.  Inputs to the valuation methodology include:

· Quoted prices for similar assets or liabilities in active markets

· Quoted prices for identical or similar assets or liabilities in inactive markets

· Inputs other than quoted prices that are observable for the asset or liability

· Inputs that are derived principally from or corroborated by observable market data by correlation or other means

If the asset or liability has a specified (contractual) term, the level 2 input must be observable for substantially the full term of the asset or liability.

Level 3.  Inputs to the valuation methodology are unobservable and significant to the fair value measurement.

The asset or liability’s fair value measurement level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement. Valuation techniques used must maximize the use of observable inputs and minimize the use of unobservable inputs.

The table below presents our assets and liabilities that are measured at fair value on a recurring basis at September 30, 2017 and are categorized using the fair value hierarchy (in thousands):

	Fair Value Measurements at September 30, 2017
			Quoted Prices in		Significant Other		Significant
			Active Markets for		Observable		Unobservable
			Identical Assets		Inputs		Inputs
	Total		(Level 1)		(Level 2)		(Level 3)
Restricted cash	$	5,000	$	5,000	$	—	$	—

The table below presents our assets and liabilities that are measured at fair value on a recurring basis during the fiscal year ended March 31, 2017 and are categorized using the fair value hierarchy (in thousands):

	Fair Value Measurements at March 31, 2017
			Quoted Prices in		Significant Other		Significant
			Active Markets for		Observable		Unobservable
			Identical Assets		Inputs		Inputs
	Total		(Level 1)		(Level 2)		(Level 3)
Cash equivalents	$	7,520	$	7,520	$	—	$	—
Restricted cash	$	5,514	$	5,514	$	—	$	—

Cash equivalents include cash held in money market and U.S. treasury funds at March 31, 2017.

Basis for Valuation

The carrying values reported in the consolidated balance sheets for cash and cash equivalents, restricted cash, accounts receivable and accounts payable approximate fair values because of the immediate or short-term maturities of these financial instruments. As the Company's obligations under the Credit Facility are based on adjustable market rates reflective of what would currently be available to the Company, the Company has determined that the carrying value approximates the fair value. The carrying values and estimated fair values of these obligations are as follows (in thousands):

	As of				As of
	September 30, 2017				March 31, 2017
	Carrying		Estimated		Carrying		Estimated
	Value		Fair Value		Value		Fair Value
Obligations under the credit facility	$	9,575	$	9,575	$	11,533	$	11,533

Adoption of ASU 2017-11

The Company changed its method of accounting for warrants through the early adoption of ASU 2017-11 during the three months ended June 30, 2017 on a full retrospective basis. Accordingly, the Company reclassified the warrant liability to additional paid in capital on its March 31, 2017 consolidated balance sheets, which increased additional paid-in capital by $2.9 million and decreased warrant liability by $2.9 million. In addition, because of the retrospective adoption, the Company credited change in fair value of warrant liability on its consolidated statements of operations by $0.5 million and $1.3 million for the three months and year ended March 31, 2017, respectively. The change in unrealized gain/loss on warrant liability was offset by a $1.3 million credit to accumulated deficit on the consolidated balance sheets. Adoption of ASU 2017-11 had no impact on the Company’s consolidated statement of cash flows in the current or previous interim and annual reporting periods. The adoption of ASU 2017-11 also had no impact on statement of operations during the six months ended September 30, 2016 and no cumulative effect to the accumulated deficit as of the beginning of the prior annual reporting period, as there were no warrants outstanding in those respective periods that were impacted by ASU 2017-11. The following table provides a reconciliation of warrant liability, additional paid-in capital, accumulated deficit and change in fair value of warrant liability on the consolidated balance sheets for the year ended March 31, 2017 (in thousands):

	Consolidated Balance Sheets
	Warrant Liability		Additional Paid-in Capital		Accumulated deficit
Balance, March 31, 2017 (Prior to adoption of ASU 2017-11)	$	2,917	$	870,457	$	(850,876)
Reclassified warrant liability	$	(4,240)	$	4,240	$	—
Reclassified unrealized gain on warrant liability	$	1,323	$	—	$	(1,323)
Balance, March 31, 2017 (After adoption of ASU 2017-11)	$	—	$	874,697	$	(852,199)

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Revolving Credit Facility

6 Months Ended

Sep. 30, 2017

Revolving Credit Facility

Revolving Credit Facility

11.  Revolving Credit Facility

Former Credit Facility  The Company maintained two Credit and Security Agreements, as amended, with Wells Fargo, which provided the Company with a line of credit of up to $20.0 million in the aggregate. As of September 30, 2016 and March 31, 2017, $6.2 million and $11.5 million in borrowings were outstanding, respectively, under the former credit facility. Interest expense related to the former credit facility during the six months ended September 30, 2017 was $0.2 million, which includes $0.1 million in amortization of deferred financing costs. Interest expense related to the former credit facility during the three months ended September 30, 2016 was $0.1 million, which includes $42,000 in amortization of deferred financing costs. Interest expense related to the former credit facility during the six months ended September 30, 2016 was $0.3 million, which includes $0.1 million in amortization of deferred financing costs. The Company’s borrowing rate was 4.9% at March 31, 2017. Upon closing the Bridge Bank Credit Agreements with Bridge Bank the Company’s existing credit facilities with Wells Fargo were paid off in full.

New Credit Facility   On June 2, 2017, the Company entered into the Bridge Bank Credit Agreements with Western Alliance Bank through Bridge Bank, with credit support provided by the Export-Import Bank of the United States through its working capital guarantee program. Under the terms of the Bridge Bank Credit Agreements, the Company may borrow up to $12.0 million on a revolving basis depending on, among other factors, the amount of its eligible inventory and accounts receivable. The Bridge Bank Credit Agreements are for a two-year period ending June 2, 2019.

Total borrowings, letter of credit obligations and the then aggregate committed amount of cash management services under the Bridge Bank Credit Agreements may not exceed 85% of the sum of unrestricted cash and the amount of cash collateral held at Bridge Bank. As a condition of the Bridge Bank Credit Agreements, the Company has restricted $5.0 million of cash equivalents as additional security for the credit facility. Borrowings under the Bridge Bank Credit Agreements will bear per annum interest at the prime rate plus 1.5 percent, subject to increase during the occurrence of an event of default. Obligations under the Bridge Bank Credit Agreements are secured by all of the Company’s assets, including intellectual property and general intangibles. The Company has incurred $0.2 million in origination fees. These fees has been recorded under the caption “Prepaid expenses and other current assets” in the accompanying condensed consolidated balance sheets and amortized to interest expense through June 2019. As of September 30, 2017, $9.6 million in borrowings were outstanding under the new credit facility. Interest expense related to the new credit facility during the three months ended September 30, 2017 was $0.1 million, which includes $28,000 in amortization of deferred financing costs. Interest expense related to the new credit facility during the six months ended September 30, 2017 was $0.2 million, which includes $46,000 in amortization of deferred financing costs. The Company’s borrowing rate was 5.8% at September 30, 2017.

The Bridge Bank Credit Agreements include affirmative covenants as well as negative covenants that prohibit a variety of actions without Bridge Bank’s consent, including covenants that limit the Company’s ability to (a) incur or guarantee debt, (b) create liens, (c) enter into any merger, recapitalization or similar transaction or purchase all or substantially all of the assets or stock of another entity, or (d) sell, assign, transfer or otherwise dispose of the Company’s assets. 

The financial covenants of the domestic credit agreement with Bridge Bank (the “Domestic Facility”), which is included in the Bridge Bank Credit Agreements, requires the Company not to exceed specified levels of losses relative to its financial model and the outstanding line of credit advances may not exceed 85% of  the sum of unrestricted cash and the amount of cash collateral held at Bridge Bank. The Domestic Facility also defines an event of default to include a material adverse effect on the Company’s business. An event of default for this or any other reason, if not waived, could have a material adverse effect on the Company. As of September 30, 2017 we were in compliance with the covenants contained in the Bridge Bank Credit Agreements for Fiscal 2018. 

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Accrued Warranty Reserve

6 Months Ended

Sep. 30, 2017

Accrued Warranty Reserve

Accrued Warranty Reserve

12.  Accrued Warranty Reserve

The Company provides for the estimated costs of warranties at the time revenue is recognized. The specific terms and conditions of those warranties vary depending upon the microturbine product sold and geography of sale.  The Company’s product warranties generally start from the delivery date and continue for up to eighteen months. Factors that affect the Company’s warranty obligation include product failure rates, anticipated hours of product operations and costs of repair or replacement in correcting product failures. These factors are estimates that may change based on new information that becomes available each period. Similarly, the Company also accrues the estimated costs to address reliability repairs on products no longer in warranty when, in the Company’s judgment, and in accordance with a specific plan developed by the Company, it is prudent to provide such repairs. The Company assesses the adequacy of recorded warranty liabilities quarterly and makes adjustments to the liability as necessary. When the Company has sufficient evidence that product changes are altering the historical failure occurrence rates, the impact of such changes is then taken into account in estimating future warranty liabilities. During the three months ended December 31, 2016, the Company recorded a one-time non-cash warranty provision of approximately $5.2 million to retrofit proactively select non-Signature Series C200 microturbines with the more robust new Signature Series generator components to improve product performance and reliability. The balance of this reliability repair program liability as of September 30, 2017 was $0.7 million. Changes in accrued warranty reserve during the six months ended September 30, 2017 are as follows (in thousands):

Balance, beginning of the period	$	3,766
Standard warranty provision		1,190
Net accrual related to reliability repair programs		(195)
Deductions for warranty claims		(2,199)
Balance, end of the period	$	2,562

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Deferred Revenue

6 Months Ended

Sep. 30, 2017

Deferred Revenue

Deferred Revenue

13.  Deferred Revenue

As of March 31, 2017 the balance of deferred revenue was approximately $5.0 million. The change in deferred revenue attributed to Comprehensive Factory Protection Plan (“FPP”) contracts during the six months ended September 30, 2017 was a decrease of $0.1 million and the change in deferred revenue attributed to deposits during the six months ended September 30, 2017 was an increase of $0.1 million. Changes in deferred revenue during the six months ended September 30, 2017 are as follows (in thousands):

FPP Balance, beginning of the period	$	3,414
FPP Billings		7,164
FPP Revenue recognized		(7,309)
Balance attributed to FPP contracts		3,269
Deposits		1,730
Deferred revenue balance, end of the period	$	4,999

Deferred revenue attributed to FPP contracts represents the unearned portion of the billed agreements. FPP agreements are generally paid quarterly in advance with revenue recognized on a straight line basis over the contract period. Deposits are primarily non-refundable cash payments from distributors for orders to be delivered in the future.

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Other Current Liabilities

6 Months Ended

Sep. 30, 2017

Other Current Liabilities

Other Current Liabilities

14.  Other Current Liabilities

The Company is a party to a Development and License Agreement with Carrier Corporation (“Carrier”) regarding the payment of royalties on the sale of each of the Company’s 200 kilowatt (“C200”) microturbines. Carrier earned $0.2 million and $0.1 million in royalties for C200 and C1000 Series system sales during the three months ended September 30, 2017 and 2016, respectively. Carrier earned $0.5 million and $0.3 million in royalties for C200 and C1000 system sales during the six months ended September 30, 2017 and 2016, respectively. Earned royalties of approximately $0.2 million and $0.3 million were unpaid as of September 30, 2017 and March 31, 2017, respectively, and are included in accrued expenses in the accompanying balance sheets.

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Commitments and Contingencies

6 Months Ended

Sep. 30, 2017

Commitments and Contingencies

Commitments and Contingencies

15.  Commitments and Contingencies

Purchase Commitments

As of September 30, 2017, the Company had firm commitments to purchase inventories of approximately $23.3 million through Fiscal 2019. Certain inventory delivery dates and related payments are not firmly scheduled; therefore, amounts under these firm purchase commitments will be payable upon the receipt of the related inventories.

Lease Commitments

The Company leases offices and manufacturing facilities under various non-cancelable operating leases expiring at various times through the fiscal year ending March 31, 2020. All of the leases require the Company to pay maintenance, insurance and property taxes. The lease agreements for primary office and manufacturing facilities provide for rent escalation over the lease term and renewal options for five-year periods. Rent expense is recognized on a straight-line basis over the term of the lease. The difference between rent expense recorded and the amount paid is credited or charged to deferred rent, which is included in other long-term liabilities in the accompanying balance sheets. The balance of deferred rent was approximately $0.1 million and $0.2 million as of September 30, 2017 and March 31, 2017, respectively. Rent expense was approximately $0.6 million during each of the three months ended September 30, 2017 and 2016. Rent expense was approximately $1.1 million and $1.2 million during the six months ended September 30, 2017 and 2016, respectively.

On June 7, 2017 the Company and Prologis, L.P entered into a Fourth Amendment to Lease (the “Van Nuys Fourth Amendment”) to amend the Lease by extending the term of the Lease for a period of sixty-two (62) months commencing on December 31, 2017 to February 28, 2023. The Van Nuys Fourth Amendment also adjusts the monthly base rent payable by the Company under the Lease Agreement to the following: $0 per month from January 1, 2018 through February 28, 2018; $66,846 per month from March 1, 2018 through December 31, 2018; $68,852 per month from January 1, 2019 through December 31, 2019; $70,917 per month from January 1, 2020 through December 31, 2020; $73,045 per month from January 1, 2021 through December 31, 2021; $75,236 per month from January 1, 2022 through December 31, 2022; and $77,493 per month from January 1, 2023 through February 28, 2023. The Van Nuys Fourth Amendment also provides the Company with an option to extend the Lease by an additional five-year term following the expiration of the term of the Lease as amended by the Lease Amendment and provides that Prologis, L.P. will contribute a tenant improvement allowance toward the Company’s approved alterations to the premises.

Other Commitments

The Company has agreements with certain of its distributors requiring that if the Company renders parts obsolete in inventories the distributors own and hold in support of their obligations to serve fielded microturbines, then the Company is required to replace the affected stock at no cost to the distributors. While the Company has never incurred costs or obligations for these types of replacements, it is possible that future changes in the Company’s product technology could result and yield costs to the Company if significant amounts of inventory are held at distributors. As of September 30, 2017, no significant inventories were held at distributors.

Legal Matters

Federal Securities Class Action

Two putative securities class action complaints were filed against the Company and certain of its current and former officers in the United States District Court for the Central District of California under the following captions:  David Kinney, etc. v. Capstone Turbine, et al., No. 2:15-CV-08914 on November 16, 2015 (the “Kinney Complaint”) and Kevin M. Grooms, etc. v. Capstone Turbine, et al., No. 2:15-CV-09155 on December 18, 2015 (the “Grooms Complaint”).

The putative class in the Kinney Complaint is comprised of all purchasers of the Company’s securities between November 7, 2013 and November 5, 2015.  The Kinney Complaint alleges material misrepresentations and omissions in public statements regarding BPC and the likelihood that BPC would not be able to fulfill many legal and financial obligations to the Company.  The Kinney Complaint also alleges that the Company’s financial statements were not appropriately adjusted in light of this situation and were not maintained in accordance with GAAP, and that the Company lacked adequate internal controls over accounting.  The Kinney Complaint alleges that these public statements and accounting irregularities constituted violations by all named defendants of Section 10(b) of the Exchange Act, and Rule 10b-5 thereunder, as well as violations of Section 20(a) of the Exchange Act by the individual defendants.  The Grooms Complaint makes allegations and claims that are substantially identical to those in the Kinney Complaint, and both complaints seek compensatory damages of an undisclosed amount.  On January 16, 2016, several shareholders filed motions to consolidate the Kinney and Grooms actions and for appointment as lead plaintiff.  On February 29, 2016, the Court granted the motions to consolidate, and appointed a lead plaintiff.  On May 6, 2016, a Consolidated Amended Complaint with allegations and claims substantially identical to those of the Kinney Complaint was filed in the consolidated action.  The putative class period in the Consolidated Amended Complaint is June 12, 2014 to November 5, 2015.  Defendants filed a motion to dismiss the Consolidated Amended Complaint on June 17, 2016. On March 10, 2017, the Court issued an order granting Defendants’ motion to dismiss in its entirety with leave to amend. Plaintiffs filed an amended complaint on April 28, 2017. Defendants’ motion to dismiss was filed June 2, 2017. Plaintiffs filed their opposition to the motion to dismiss on July 7, 2017, and Defendants filed their reply in support of the motion to dismiss on July 28, 2017. The court vacated the hearing that was scheduled for August 18, 2017. The Company has not recorded any liability as of September 30, 2017 since any potential loss is not probable or reasonably estimable given the preliminary nature of the proceedings.

State Derivative Lawsuits — California

On February 18, 2016, a purported shareholder derivative action was filed in Los Angeles Superior Court in the State of California against the Company and certain of its current and former officers and directors under the following caption:  Stesiak v. Jamison, et al., No. BC610782.  The lawsuit alleges that certain of the Company’s current and former officers and directors knew or should have known that BPC would be unable to fulfill its obligations to the Company, but allowed the Company to make false and misleading statements regarding BPC and the Company’s financial condition.  The complaint also alleges that the defendants failed to timely adjust the Company’s account receivables and backlog to reflect BPC’s inability to pay the Company.  The complaint asserts causes of action for breach of fiduciary duty and unjust enrichment.  It demands damages for the amount of damage sustained by the Company as a result of the individual defendants’ alleged breach of fiduciary duties and unjust enrichment, that the Company institute corporate governance reforms, and disgorgement from the individual defendants.  On May 5, 2016, the parties filed a stipulation and proposed order seeking to stay this action until such time as the defendants’ motion(s) to dismiss the federal securities class action are either granted with prejudice or denied in whole or in part.  On May 10, 2016, the Court entered that proposed order. Given that the federal securities class action was dismissed with leave to amend, this case is still stayed. A status conference is scheduled for January 2, 2018.

On June 8, 2016, a purported shareholder derivative action entitled Velma Kilpatrick v. Simon, et al., No. BC623167, was filed in Los Angeles Superior Court in the State of California against the Company and certain of its current and former officers and directors.  The complaint alleges that certain of the Company’s current and former officers and directors knew or should have known that BPC would be unable to fulfill its obligations to the Company, but allowed the Company to make false and misleading statements regarding BPC and the Company’s financial condition.  The complaint also alleges that the defendants failed to timely adjust the Company’s account receivables and backlog to reflect BPC’s inability to pay the Company.  The complaint asserts causes of action for breach of fiduciary duty.  It demands damages for the amount of damage sustained by the Company as a result of the individual defendants’ alleged breach of fiduciary duties, and that the Company institute corporate governance reforms. On August 23, 2016, the parties filed a stipulation and proposed order seeking to stay this action until such time as the defendants’ motion(s) to dismiss the federal securities class action are either granted with prejudice or denied in whole or in part.  Given that the federal securities class action was dismissed with leave to amend, this case is still stayed. A status conference is scheduled for December 1, 2017.

On December 27, 2016, a purported shareholder derivative action entitled Andre Rosowsky v. Jamison, et al., No. 30-2016-00894859-CU-MC-CJC was filed in Orange County Superior Court in the State of California against the Company and certain of its current and former officers and directors. The complaint alleges that certain of the Company’s current and former officers and directors knew or should have known that BPC would be unable to fulfill its obligations to the Company, but allowed the Company to make false and misleading statements regarding BPC and the Company’s financial condition.  The complaint also alleges that the defendants failed to timely adjust the Company’s account receivables and backlog to reflect BPC’s inability to pay the Company.  The complaint asserts causes of action for breach of fiduciary duty and unjust enrichment.  It demands damages for the amount of damage sustained by the Company as a result of the individual defendants’ alleged breach of fiduciary duties, that the Company institute corporate governance reforms, and restitution from the individual defendants. On April 14, 2017, the case was removed to the United States District Court for the Central District of California. On May 5, 2017, the plaintiff voluntarily dismissed his complaint without prejudice.

Federal Derivative Lawsuits

On March 7, 2016, a purported shareholder derivative action was filed in the United States District Court for the Central District of California against the Company and certain of its current and former officers and directors under the following caption:  Haber v. Jamison, et al., No. CV16-01569-DMG (RAOx).  The lawsuit alleges that certain of the Company’s current and former officers and directors knew or should have known that BPC would be unable to fulfill its obligations to the Company, but allowed the Company to make false and misleading statements regarding BPC and the Company’s financial condition.  The complaint asserts a cause of action for breach of fiduciary duty.  It demands damages for the amount of damage sustained by the Company as a result of the individual defendants’ alleged breach of fiduciary duties, and equitable relief, including that the Company institute appropriate corporate governance reforms.  On May 11, 2016, the parties filed a stipulation and proposed order seeking to stay this action until such time as the defendants’ motion(s) to dismiss the federal securities class action are either granted with prejudice or denied in whole or in part. On May 13, 2016, the Court entered that proposed order.  Given that the federal securities class action was dismissed with leave to amend, this case is still stayed.

On July 12, 2016 and July 18, 2016, respectively, two additional purported shareholder derivative actions were filed in the United States District Court for the Central District of California against the Company and certain of its current and former officers and directors, under the caption Tuttle v. Atkinson, et al., No. CV16-05127, and Boll v. Jamison, et al., No. CV16-5282, respectively.  The lawsuits allege that certain of the Company’s current and former officers and directors knew or should have known that BPC would be unable to fulfill its obligations to the Company, but allowed the Company to make false and misleading statements regarding BPC and the Company’s financial condition.  The Tuttle complaint asserts causes of action for breach of fiduciary duty, gross mismanagement, and unjust enrichment, and the Boll complaint asserts causes of action for breach of fiduciary duty, unjust enrichment, abuse of control, gross mismanagement, and waste of corporate assets.  Both complaints demand damages sustained by the Company as a result of the individual defendants’ alleged breaches of fiduciary duties, and equitable relief, including that the Company institute appropriate corporate governance reforms. The federal derivative actions have been stayed until such time as the defendants’ motion(s) to dismiss the federal securities class action are either granted with prejudice or denied in whole or in part. Given that the federal securities class action was dismissed with leave to amend, these cases are still stayed.

Shareholder Demand

Following the dismissal without prejudice of his purported shareholder derivative action discussed above, former plaintiff in Andre Rosowsky v. Jamison, et al. sent us a letter dated July 7, 2017 (the “Shareholder Demand”) demanding that the Board of Directors take action to remedy purported breaches of fiduciary duties allegedly related to the claims asserted in the above-discussed securities class action and derivative actions. The Company acknowledged the Shareholder Demand on July 25, 2017. The Company’s Board of Directors has formed a committee to evaluate the Shareholder Demand.

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Net Loss Per Common Share

6 Months Ended

Sep. 30, 2017

Net Loss Per Common Share

Net Loss Per Common Share

16.  Net Loss Per Common Share

Basic loss per share of common stock is computed using the weighted average number of common shares outstanding for the period. Diluted loss per share is computed without consideration to potentially dilutive instruments because the Company incurred losses in the three months ended September 30, 2017 which would make these instruments anti-dilutive. As of September 30, 2017 and 2016, the number of anti-dilutive stock options and restricted stock units excluded from diluted net loss per common share computations was approximately 0.9 million and 0.8 million, respectively. As of September 30, 2017 and 2016, the number of warrants excluded from diluted net loss per common share computations was approximately 10.4 million and 5.5 million, respectively.

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Subsequent Events

6 Months Ended

Sep. 30, 2017

Subsequent Events

Subsequent Events

17. Subsequent Events

On October 26, 2017, the Company entered into a Warrant Exercise Agreement (the “Exercise Agreement”) with a holder of the Series A warrants (the “Exercising Holder”), which Exercising Holder owns Series A warrants exercisable for 1,928,750 shares of Common Stock. Pursuant to the Exercise Agreement, the Exercising Holder and the Company agreed that the Exercising Holder would exercise its Series A warrants with respect to 1,928,750 shares of Common Stock underlying such Series A warrants for a reduced exercise price equal to $0.90 per share. On October 27, 2017, the Company received net proceeds of approximately $1.7 million from the exercise of the Series A warrants by the Exercising Holder. The Company did not pay any financial advisory fees in connection with the exercise of the Series A warrants by the Exercising Holder. In addition, the exercise resulted in the reduction of warrants to purchase common stock, par value $0.001 per share, of the Company by approximately 19% and was not dilutive to existing stockholders of the Company calculated on a fully diluted basis for outstanding warrants.

On October 18, 2017, the Company announced that it had granted Turbine International, LLC (“TI”) and its affiliate, MTE Service, the sole distribution rights for Capstone products and services in the Russian oil and gas sector in exchange for approximately $6.3 million in cash. In connection with the appointment of TI as the Company’s distributor in the Russian oil and gas sector, on October 13, 2017, the Company and TI entered into an Accounts Receivable Assignment Agreement (the “Accounts Receivable Agreement”) and Promissory Note (the “Promissory Note”). Pursuant to the terms of the Accounts Receivable Agreement, the Company assigned to IT its right, title and interest to receivables owed to the Company from the Company’s distributor BPC Engineering. As consideration for the assignment of the BPC receivable, TI will pay the Company $2.5 million in three payments by February 1, 2018. The first payment of $0.1 million was paid on September 13, 2017. Under the terms of the Promissory Note, TI agreed to pay the Company $3.8 million to be paid over a three-year period in 35 equal monthly installments starting in August 2018. On October 13, 2017, the Company and Hispania Petroleum, S.A. (the “Guarantor”), entered into a Guaranty Agreement (the “Guaranty Agreement”) whereby the Guarantor guarantees TI’s obligations under the Accounts Receivable Agreement and Promissory Note. MTE Service is a wholly owned subsidiary of Hispania Petroleum S.A.

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Inventories (Tables)

6 Months Ended

Sep. 30, 2017

Inventories

Summary of inventory

Inventories are valued on a first in first out (“FIFO”) basis and lower of cost or net realizable value and consisted of the following as of September 30, 2017 and March 31, 2017 (in thousands):

	September 30,		March 31,
	2017		2017
Raw materials	$	14,436	$	15,035
Work in process		290		—
Finished goods		2,542		464
Total		17,268		15,499
Less non-current portion		(994)		(961)
Current portion	$	16,274	$	14,538

Schedule of expected usage for non-current inventory

The Company expects to use the non-current portion of the inventories on hand as of September 30, 2017 over the periods presented in the following table (in thousands):

		Non-current Inventory
		Balance Expected
Expected Period of Use		to be Used
13 to 24 months	$	358
25 to 36 months		636
Total	$	994

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Property, Plant and Equipment (Tables)

6 Months Ended

Sep. 30, 2017

Property, Plant and Equipment

Schedule of property, plant and equipment

Property, plant and equipment consisted of the following as of September 30, 2017 and March 31, 2017 (in thousands):

	September 30,		March 31,
	2017		2017
Machinery, rental equipment, equipment, automobiles and furniture	$	16,050	$	17,657
Leasehold improvements		9,828		9,870
Molds and tooling		2,929		2,866
		28,807		30,393
Less, accumulated depreciation		(26,575)		(28,278)
Total property, plant and equipment, net	$	2,232	$	2,115

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Intangible Assets (Tables)

6 Months Ended

Sep. 30, 2017

Intangible Assets

Schedule of intangible assets

Intangible assets consisted of the following as of September 30, 2017 and March 31, 2017 (in thousands):

	September 30, 2017
	Weighted
	Average	Intangible
	Amortization	Assets,		Accumulated		Intangible
	Period	Gross		Amortization		Assets, Net
Manufacturing license	17 years	$	3,700	$	3,700	$	—
Technology	10 years		2,240		1,717		523
Trade name & parts, service and TA100 customer relationships	1.2 to 5 years		1,766		1,766		—
Total		$	7,706	$	7,183	$	523

	March 31, 2017
	Weighted
	Average	Intangible
	Amortization	Assets,		Accumulated		Intangible
	Period	Gross		Amortization		Assets, Net
Manufacturing license	17 years	$	3,700	$	3,684	$	16
Technology	10 years		2,240		1,605		635
Trade name & parts, service and TA100 customer relationships	1.2 to 5 years		1,766		1,766		—
Total		$	7,706	$	7,055	$	651

Schedule of expected future amortization expense of intangible assets

Expected future amortization expense of intangible assets as of September 30, 2017 is as follows (in thousands):

	Amortization
Year Ending March 31,	Expense
2018 (remainder of fiscal year)		112
2019		224
2020		187
Thereafter		—
Total expected future amortization	$	523

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Stock-Based Compensation (Tables)

6 Months Ended

Sep. 30, 2017

Stockholders' Equity.

Summary of stock-based compensation expense by statement of operations line item

The following table summarizes, by statement of operations line item, stock-based compensation expense for the Company’s three and six months ended September 30, 2017 and 2016 (in thousands):

	Three Months Ended				Six Months Ended
	September 30,				September 30,
	2017		2016		2017		2016
Cost of goods sold	$	18	$	14	$	38	$	29
Research and development		5		13		12		16
Selling, general and administrative		130		214		257		434
Stock-based compensation expense	$	153	$	241	$	307	$	479

Summary of stock option activity

				Weighted-
				Average
		Weighted-		Remaining	Aggregate
		Average		Contractual	Intrinsic
	Shares	Exercise Price		Term	Value
				(in years)
Options outstanding at March 31, 2017	314,537	$	15.48
Granted	—	$	—
Exercised	—	$	—
Forfeited, cancelled or expired	(4,000)	$	24.25
Options outstanding at September 30, 2017	310,537	$	15.37	4.9		—
Options fully vested at September 30, 2017 and those expected to vest beyond September 30, 2017	310,537	$	15.37	4.9		—
Options exercisable at September 30, 2017	245,693	$	18.98	3.9		—

Schedule of weighted-average assumptions used to calculate the estimated fair value of each stock option

	Three and Six Months Ended
	September 30, 2016
Risk-free interest rates		1.3	%
Expected lives (in years)		5.7
Dividend yield		—	%
Expected volatility		133.9	%
Weighted average grant date fair value of options granted during the period	$	1.52

Summary of restricted stock unit and performance restricted stock unit activity

		Weighted
		Average Grant
		Date Fair
Restricted Stock and Performance Restricted Stock Units	Shares	Value
Nonvested restricted stock units outstanding at March 31, 2017	316,709	$	2.85
Granted	474,848		0.64
Vested and issued	(212,924)		2.76
Forfeited	(9,513)		2.49
Nonvested restricted stock units outstanding at September 30, 2017	569,120		1.05
Restricted stock units expected to vest beyond September 30, 2017	569,097	$	1.05

Schedule of additional information on restricted stock units

	Three Months Ended				Six Months Ended
	September 30,				September 30,
	2017		2016		2017		2016
Restricted stock compensation expense (in thousands)	$	144	$	188	$	287	$	375
Aggregate fair value of restricted stock units vested and issued (in thousands)	$	130	$	85	$	137	$	107
Weighted average grant date fair value of restricted stock units granted during the period	$	0.62	$	1.71	$	0.67	$	1.71

Schedule of restricted stock award activity

	Three Months Ended				Six Months Ended
	September 30,				September 30,
	2017		2016		2017		2016
Restricted stock awards compensation expense (in thousands)	$	1	$	50	$	3	$	101
Restricted stock awards granted		1,953		29,910		3,969		62,111
Weighted average grant date fair value of restricted stock awards granted during the period	$	0.64	$	1.69	$	0.63	$	1.63

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Fair Value Measurements (Tables)

6 Months Ended

Sep. 30, 2017

Fair Value Measurements

Schedule of assets and liabilities measured at fair value on a recurring basis

The table below presents our assets and liabilities that are measured at fair value on a recurring basis at September 30, 2017 and are categorized using the fair value hierarchy (in thousands):

	Fair Value Measurements at September 30, 2017
			Quoted Prices in		Significant Other		Significant
			Active Markets for		Observable		Unobservable
			Identical Assets		Inputs		Inputs
	Total		(Level 1)		(Level 2)		(Level 3)
Restricted cash	$	5,000	$	5,000	$	—	$	—

The table below presents our assets and liabilities that are measured at fair value on a recurring basis during the fiscal year ended March 31, 2017 and are categorized using the fair value hierarchy (in thousands):

	Fair Value Measurements at March 31, 2017
			Quoted Prices in		Significant Other		Significant
			Active Markets for		Observable		Unobservable
			Identical Assets		Inputs		Inputs
	Total		(Level 1)		(Level 2)		(Level 3)
Cash equivalents	$	7,520	$	7,520	$	—	$	—
Restricted cash	$	5,514	$	5,514	$	—	$	—

Schedule of carrying values and estimated fair values of obligations under the revolving credit facility

The carrying values and estimated fair values of these obligations are as follows (in thousands):

	As of				As of
	September 30, 2017				March 31, 2017
	Carrying		Estimated		Carrying		Estimated
	Value		Fair Value		Value		Fair Value
Obligations under the credit facility	$	9,575	$	9,575	$	11,533	$	11,533

Reconciliation of warrant liability, additional paid-in capital, accumulated deficit and change in fair value of warrant liability on the consolidated balance sheets and consolidated statement of operations

	Consolidated Balance Sheets
	Warrant Liability		Additional Paid-in Capital		Accumulated deficit
Balance, March 31, 2017 (Prior to adoption of ASU 2017-11)	$	2,917	$	870,457	$	(850,876)
Reclassified warrant liability	$	(4,240)	$	4,240	$	—
Reclassified unrealized gain on warrant liability	$	1,323	$	—	$	(1,323)
Balance, March 31, 2017 (After adoption of ASU 2017-11)	$	—	$	874,697	$	(852,199)

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Accrued Warranty Reserve (Tables)

6 Months Ended

Sep. 30, 2017

Accrued Warranty Reserve

Schedule of changes in accrued warranty reserve

Changes in accrued warranty reserve during the six months ended September 30, 2017 are as follows (in thousands):

Balance, beginning of the period	$	3,766
Standard warranty provision		1,190
Net accrual related to reliability repair programs		(195)
Deductions for warranty claims		(2,199)
Balance, end of the period	$	2,562

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Deferred Revenue (Tables)

6 Months Ended

Sep. 30, 2017

Deferred Revenue

Schedule of changes in deferred revenue

FPP Balance, beginning of the period	$	3,414
FPP Billings		7,164
FPP Revenue recognized		(7,309)
Balance attributed to FPP contracts		3,269
Deposits		1,730
Deferred revenue balance, end of the period	$	4,999

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Basis of Presentation (Details) $ in Thousands		3 Months Ended		6 Months Ended
	Jun. 02, 2017 USD ($) agreement	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2017 USD ($) agreement	Sep. 30, 2016 USD ($)	Mar. 31, 2017 USD ($)	Mar. 31, 2016 USD ($)
Net loss		$ 3,667	$ 5,865	$ 7,760	$ 10,382
Cash used in operating activities				5,852	10,027
Cash, cash equivalents and restricted cash		15,156	$ 16,112	15,156	$ 16,112	$ 19,705	$ 16,706
Outstanding borrowings		9,575		$ 9,575		11,533
Bridge Bank
Number of secured credit facilities | agreement	2
Term of credit agreements	2 years
Wells Fargo
Number of credit and security agreements | agreement				2
Credit Facility | Bridge Bank
Outstanding borrowings		9,600		$ 9,600
Maximum borrowing capacity under facility	$ 12,000
Credit Facility | Wells Fargo
Outstanding borrowings		6,200		6,200		$ 11,500
Maximum borrowing capacity under facility		20,000		20,000
Doubt about Company’s ability to meet obligations for next 12 months
Net loss		3,700
Cash used in operating activities		5,100
Cash, cash equivalents and restricted cash		15,200		15,200
Doubt about Company’s ability to meet obligations for next 12 months | Credit Facility
Outstanding borrowings		$ 9,600		$ 9,600

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Customer Concentrations and Accounts Receivable (Details) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Mar. 31, 2017
Customer Concentrations and Accounts Receivable
Provision for doubtful accounts receivable	$ (9,000)	$ (500,000)	$ (22,000)	$ (1,396,000)
Accounts receivable			3,778,000	2,221,000
Deferred revenue			(49,000)	$ 153,000
BPC Engineering
Customer Concentrations and Accounts Receivable
Provision for doubtful accounts receivable			8,100,000
Accounts receivable			$ 1,700,000
Sales | Customer concentrations | Regatta
Customer Concentrations and Accounts Receivable
Concentration percentage	11.00%			11.00%
Sales | Customer concentrations | E-Finity
Customer Concentrations and Accounts Receivable
Concentration percentage	11.00%		13.00%
Sales | Customer concentrations | Horizon Power Systems
Customer Concentrations and Accounts Receivable
Concentration percentage			12.00%
Sales | Customer concentrations | Reliable Secure Power Systems
Customer Concentrations and Accounts Receivable
Concentration percentage	12.00%
Sales | Customer concentrations | Optimal Group Australia
Customer Concentrations and Accounts Receivable
Concentration percentage	11.00%		10.00%
Sales | Customer concentrations | BPC Engineering
Customer Concentrations and Accounts Receivable
Concentration percentage		11.00%
Sales | Customer concentrations | IBT Europe GmbH
Customer Concentrations and Accounts Receivable
Concentration percentage	10.00%
Net accounts receivable | Credit concentration | Regatta
Customer Concentrations and Accounts Receivable
Concentration percentage			13.00%
Net accounts receivable | Credit concentration | E-Finity
Customer Concentrations and Accounts Receivable
Concentration percentage			16.00%		29.00%
Net accounts receivable | Credit concentration | Reliable Secure Power Systems
Customer Concentrations and Accounts Receivable
Concentration percentage			16.00%		10.00%
Net accounts receivable | Credit concentration | DTC
Customer Concentrations and Accounts Receivable
Concentration percentage					12.00%
Net accounts receivable | Credit concentration | IBT Europe GmbH
Customer Concentrations and Accounts Receivable
Concentration percentage			11.00%

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Inventories - Current (Details) - USD ($) $ in Thousands	6 Months Ended
	Sep. 30, 2017	Mar. 31, 2017
Inventories
Raw materials	$ 14,436	$ 15,035
Work in process	290
Finished goods	2,542	464
Total	17,268	15,499
Less non-current portion	(994)	(961)
Current portion	$ 16,274	$ 14,538
Weighted average age of noncurrent inventories	1 year 7 months 6 days

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Inventories - Non-Current (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Mar. 31, 2017
Inventories
Non-current inventory, 13 to 24 Months	$ 358
Non-current inventory, 25 to 36 Months	636
Total	$ 994	$ 961

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Property, Plant and Equipment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Mar. 31, 2017
Property, Plant and Equipment
Total property, plant and equipment, gross	$ 28,807		$ 28,807		$ 30,393
Less accumulated depreciation	(26,575)		(26,575)		(28,278)
Total property, plant and equipment, net	2,232		2,232		2,115
Depreciation expense	200	$ 300	400	$ 600
Machinery, rental equipment, equipment, automobiles and furniture
Property, Plant and Equipment
Total property, plant and equipment, gross	16,050		16,050		17,657
Leasehold improvements
Property, Plant and Equipment
Total property, plant and equipment, gross	9,828		9,828		9,870
Molds and tooling
Property, Plant and Equipment
Total property, plant and equipment, gross	$ 2,929		$ 2,929		$ 2,866

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Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Mar. 31, 2017
Intangible Assets
Intangible Assets, Gross	$ 7,706		$ 7,706		$ 7,706
Accumulated Amortization	7,183		7,183		7,055
Intangible Assets, Net	523		523		651
Amortization expense	100	$ 100	100	$ 100
Expected future amortization expense of intangible assets
2018 (remainder of fiscal year)	112		112
2019	224		224
2020	187		187
Intangible Assets, Net	523		$ 523		$ 651
Manufacturing license
Intangible Assets
Weighted Average Amortization Period			17 years		17 years
Intangible Assets, Gross	3,700		$ 3,700		$ 3,700
Accumulated Amortization	3,700		$ 3,700		3,684
Intangible Assets, Net					16
Expected future amortization expense of intangible assets
Intangible Assets, Net					$ 16
Technology
Intangible Assets
Weighted Average Amortization Period			10 years		10 years
Intangible Assets, Gross	2,240		$ 2,240		$ 2,240
Accumulated Amortization	1,717		1,717		1,605
Intangible Assets, Net	523		523		635
Expected future amortization expense of intangible assets
Intangible Assets, Net	523		523		635
Trade Name and Parts, Service and TA100 Customer Relationships
Intangible Assets
Intangible Assets, Gross	1,766		1,766		1,766
Accumulated Amortization	$ 1,766		$ 1,766		$ 1,766
Minimum | Trade Name and Parts, Service and TA100 Customer Relationships
Intangible Assets
Weighted Average Amortization Period			1 year 2 months 12 days		1 year 2 months 12 days
Maximum | Trade Name and Parts, Service and TA100 Customer Relationships
Intangible Assets
Weighted Average Amortization Period			5 years		5 years

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Intangible Assets - Solar Turbines (Details) - Solar - USD ($)	3 Months Ended		6 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Mar. 31, 2017
Intangible Assets
Years subject to payment of per-unit royalty fees			17 years
Royalties earned	$ 7,200	$ 6,400	$ 13,700	$ 14,700
Unpaid earned royalties	$ 7,200		$ 7,200		$ 10,000

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Stock-Based Compensation - Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Stock-Based Compensation
Share based compensation expenses	$ 153	$ 241	$ 307	$ 479
Cost of goods sold.
Stock-Based Compensation
Share based compensation expenses	18	14	38	29
Research and development
Stock-Based Compensation
Share based compensation expenses	5	13	12	16
Selling, general and administrative
Stock-Based Compensation
Share based compensation expenses	$ 130	$ 214	$ 257	$ 434

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Stock-Based Compensation - 2000 Equity Incentive Plan and 2017 Equity Incentive Plan (Details)	6 Months Ended
	Sep. 30, 2017 shares
2000 Equity Incentive Plan and 2017 Equity Incentive Plan | Stock options
Stockholders' equity
Vesting period	4 years
Expiration Term	10 years
Assumed stock option forfeitures (in shares)	0
Portion vesting one year after the issuance date (as a percent)	25.00%
Vesting period after one year of grant	1 year
Portion vesting on first day of each month after one year from the issuance date (as a percent)	2.083%
Vesting period of awards after issuance date	48 months
2000 Plan
Stockholders' equity
Number of shares of common stock reserved for issuance	1,849,000
2017 Plan
Stockholders' equity
Number of shares of common stock reserved for issuance	3,000,000

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Stock-Based Compensation - Stock Options (Details) - USD ($)	3 Months Ended		6 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Additional disclosure
Share based compensation expenses	$ 153,000	$ 241,000	$ 307,000	$ 479,000
Stock options
Shares
Outstanding at the beginning of the period (in shares)			314,537
Granted (in shares)	0		0
Forfeited, cancelled or expired (in shares)			(4,000)
Outstanding at the end of the period (in shares)	310,537		310,537
Options fully vested and those expected to vest (in shares)	310,537		310,537
Options exercisable	245,693		245,693
Weighted Average Exercise Price
Outstanding at the beginning of the period (in dollars per share)			$ 15.48
Forfeited, cancelled or expired (in dollars per share)			24.25
Outstanding at the end of the period (in dollars per share)	$ 15.37		15.37
Options fully vested and those expected to vest (in dollars per share)	15.37		15.37
Exercisable (in dollars per share)	$ 18.98		$ 18.98
Weighted Average Remaining Contractual Term (in years)
Outstanding at the end of the period			4 years 10 months 24 days
Options fully vested and those expected to vest			4 years 10 months 24 days
Exercisable			3 years 10 months 24 days
Weighted-average assumptions used to calculate estimated fair value of each stock option
Risk-free interest rates (as a percent)				1.30%
Expected lives (in years)				5 years 8 months 12 days
Expected volatility (as a percent)				133.90%
Weighted average grant date fair value of options granted during the period (in dollars per share)				$ 1.52
Additional disclosure
Total compensation cost related to unvested stock option awards	$ 100,000		$ 100,000
Share based compensation expenses	$ 8,000	$ 3,000	$ 17,000	$ 3,000
Weighted average period for recognizing compensation cost			2 years 10 months 24 days

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Stock-Based Compensation - RSU's and PRSU's (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended
	Aug. 31, 2017	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Jul. 31, 2017
Additional disclosure
Share based compensation expenses		$ 153	$ 241	$ 307	$ 479
Employee Stock Purchase Plan
Additional disclosure
Number of shares available for future grant		570,000		570,000		70,000
Increase in common stock available under the plan	500,000
Restricted stock units
Weighted Average Grant-Date Fair Value
Granted (in dollars per share)		$ 0.62	$ 1.71	$ 0.67	$ 1.71
Additional disclosure
Assumed forfeiture (in shares)				0
Share based compensation expenses		$ 144	$ 188	$ 287	$ 375
Aggregate fair value of restricted stock units vested and issued		130	$ 85	137	$ 107
Unrecognized compensation cost		$ 500		$ 500
Restricted stock units | Awards vesting over four years with one-fourth units vesting one year after the issuance date
Additional disclosure
Vesting period				4 years
Awards vesting percentage				25.00%
Vesting period of awards after issuance date				1 year
PRSU Program
Shares
Nonvested, balance at the beginning of the period (in shares)				316,709
Granted (in shares)				474,848
Vested and issued (in shares)				(212,924)
Forfeited (in shares)				(9,513)
Nonvested, balance at the end of the period (in shares)		569,120		569,120
Awards expected to vest (in shares)		569,097		569,097
Weighted Average Grant-Date Fair Value
Nonvested restricted stock units outstanding at the beginning of the period (in dollars per share)				$ 2.85
Granted (in dollars per share)				0.64
Vested and issued (in dollars per share)				2.76
Forfeited (in dollars per share)				2.49
Nonvested restricted stock units outstanding at the end of the period (in dollars per share)		$ 1.05		1.05
Awards expected to vest (in dollars per share)		$ 1.05		$ 1.05
Restricted Stock Awards
Shares
Granted (in shares)		1,953	29,910	3,969	62,111
Weighted Average Grant-Date Fair Value
Granted (in dollars per share)		$ 0.64	$ 1.69	$ 0.63	$ 1.63
Additional disclosure
Share based compensation expenses		$ 1	$ 50	$ 3	$ 101
Weighted average period for recognizing compensation cost				1 year 2 months 12 days
Non-employee director | Restricted stock units
Additional disclosure
Vesting period				1 year

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Stock-Based Compensation - Grants outside of 2000 Plan and 2017 Plan (Details) - shares	3 Months Ended	6 Months Ended
	Sep. 30, 2017	Sep. 30, 2017	Mar. 31, 2017
Stock options
Class of Stock
Options outstanding (in shares)	310,537	310,537	314,537
Granted (in shares)	0	0
Stock options | Non-qualified stock options
Class of Stock
Portion vesting one year after the issuance date (as a percent)		25.00%
Vesting period after one year of grant		1 year
Vesting period of awards after issuance date		48 months
Portion vesting on first day of each month after one year from the issuance date (as a percent)		2.083%
Vesting period		4 years
Expiration Term		10 years
Stock options | Non-qualified stock options | Vice President, Manufacturing
Class of Stock
Options outstanding (in shares)	88,930	88,930
Restricted stock units | Vice President, Manufacturing
Class of Stock
Restricted stock units outstanding (in shares)	11,115	11,115

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Stock-Based Compensation - Stockholder Rights Plan (Details)	May 06, 2016 Vote $ / shares	Sep. 30, 2017 $ / shares	Mar. 31, 2017 $ / shares
Stockholder Rights Plan
Preferred stock, par value (in dollars per share)		$ 0.001	$ 0.001
Series B Junior Participating Preferred Stock
Stockholder Rights Plan
Preferred share purchase rights period	30 days
Preferred share purchase right ratio	1
Preferred stock conversion basis	0.001
Preferred stock, par value (in dollars per share)	$ 0.001
Purchase price (in dollars per share)	$ 8.76
Period following public announcement of beneficial ownership acquired by various persons resulting in rights becoming exercisable	10 days
Period following commencement of tender offer or exchange offer that would result in acquisition of beneficial ownership various persons resulting in rights becoming exercisable	10 days
Preferred stock dividend minimum if declared	$ 1.00
Preferred stock rights ratio over common stock	1,000
Number of votes per share | Vote	1,000
Ratio of consideration received in event of conversion or exchange transaction	1,000
Series B Junior Participating Preferred Stock | Minimum
Stockholder Rights Plan
Beneficial ownership of common stock (as a percent)	4.99%

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Offerings of Common Stock and Warrants and At-the-Market Offering Program (Details) - USD ($)						3 Months Ended	6 Months Ended		27 Months Ended
	Oct. 21, 2016	Oct. 18, 2016	Apr. 22, 2016	Apr. 19, 2016	Aug. 28, 2015	Sep. 30, 2017	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Aug. 31, 2017
Number of common stock shares available to accredited investors		3,600,000
Share price of common stock sold (in dollars per share)		$ 1.20
Loss on adjustment of exercise price						$ 657,000	$ 657,000
Net proceeds from offering of common stock and warrants	$ 6,800,000		$ 13,100,000				3,987,000	$ 13,113,000
Number of common stock shares available in public offering				2,700,000
Beneficial ownership of common stock resulting from purchase of stock in public offering (as a percent)				4.99%
Number of warrants or shares of common stock to be sold to purchase common stock				2
Aggregate offering price for at-the-market offering program							$ 12,200,000
Common stock sold (in shares)						2,400,000	5,800,000		13,100,000
Net proceeds from sale of the common stock, after deducting fees and other offering expenses (in dollars)						$ 1,400,000	$ 4,000,000		$ 16,800,000
Common stock commissions paid						45,000	100,000		$ 500,000
Maximum
Aggregate offering price for at-the-market offering program					$ 30,000,000
Series A Warrants
Number of shares of common stock that could be purchased with warrants				4,100,000
Exercise price (in dollars per share)		$ 1.34		$ 3.50						$ 0.65
Loss on adjustment of exercise price						$ 700,000	$ 700,000
Number of warrants or shares of common stock to be sold to purchase common stock				1
Number of shares of common stock purchased with each warrant				1
Length of time from issue date until warrants are exercisable				6 months
Length of time from exercise date until warrants expire				5 years
Outstanding warrants (in shares)						10,407,500	10,407,500		10,407,500
Series A Warrants | Maximum
Number of shares of common stock that could be purchased with warrants		6,300,000
Series B Warrants
Number of shares of common stock that could be purchased with warrants		2,700,000
Exercise price (in dollars per share)		$ 1.20		$ 3.48
Exercise price pre-funded at closing (in dollars per share)		1.19
Exercise price, payable upon exercise (in dollars per share)		$ 0.01
Number of warrants or shares of common stock to be sold to purchase common stock				2
Length of time from exercise date until warrants expire				9 months
Outstanding warrants (in shares)						0	0		0
Series B Warrants | Maximum
Number of shares of common stock that could be purchased with warrants				5,500,000

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Fair Value Measurements - Recurring (Details) - Recurring - USD ($) $ in Thousands	Sep. 30, 2017	Mar. 31, 2017
Total
Fair Value Measurements
Cash equivalents		$ 7,520
Restricted cash	$ 5,000	5,514
Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value Measurements
Cash equivalents		7,520
Restricted cash	$ 5,000	$ 5,514

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Fair Value Measurements - Obligations (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Mar. 31, 2017
Carrying Value
Fair Value Measurements
Obligations under the Credit Facility	$ 9,575	$ 11,533
Total
Fair Value Measurements
Obligations under the Credit Facility	$ 9,575	$ 11,533

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Fair Value Measurements – Adoption of ASU 2017-11 (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2017	Mar. 31, 2017	Sep. 30, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Additional Paid-in Capital	$ 879,639	$ 874,697	$ 879,639
Accumulated deficit	(859,959)	(852,199)	(859,959)
Change in fair value of warrant liability	$ (657)		$ (657)
ASU 2017-11 | Prior to adoption
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Warrant Liability		2,917
Additional Paid-in Capital		870,457
Accumulated deficit		(850,876)
ASU 2017-11 | Reclassified warrant liability
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Warrant Liability		(4,240)
Additional Paid-in Capital		4,240
ASU 2017-11 | Reclassified unrealized gain on warrant liability
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Warrant Liability		1,323
Accumulated deficit		(1,323)
Change in fair value of warrant liability		$ 500

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Revolving Credit Facility (Details)		3 Months Ended		6 Months Ended
	Jun. 02, 2017 USD ($) agreement	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2017 USD ($) agreement	Sep. 30, 2016 USD ($)	Mar. 31, 2017 USD ($)
Revolving Credit Facility
Outstanding borrowings		$ 9,575,000		$ 9,575,000		$ 11,533,000
Interest expense		$ 98,000	$ 129,000	319,000	$ 263,000
Amortization of deferred financing costs				$ 133,000	86,000
Borrowing rate (as a percent)		5.80%		5.80%		4.90%
Wells Fargo
Revolving Credit Facility
Number of credit and security agreements | agreement				2
Bridge Bank
Revolving Credit Facility
Number of secured credit facilities | agreement	2
Term of credit agreements	2 years
Maximum borrowings as a percent of cash held	85.00%
Credit Facility | Wells Fargo
Revolving Credit Facility
Maximum borrowing capacity under facility		$ 20,000,000		$ 20,000,000
Outstanding borrowings		6,200,000		6,200,000		$ 11,500,000
Interest expense			100,000	200,000	300,000
Amortization of deferred financing costs			$ 42,000	100,000	$ 100,000
Credit Facility | Bridge Bank
Revolving Credit Facility
Maximum borrowing capacity under facility	$ 12,000,000
Outstanding borrowings		9,600,000		9,600,000
Interest expense		100,000		200,000
Amortization of deferred financing costs		$ 28,000		$ 46,000
Restricted cash equivalents for credit facility	5,000,000
Origination fees	$ 200,000
Credit Facility | Bridge Bank | Prime Rate
Revolving Credit Facility
Variable base rate	prime rate
Interest margin on variable rate	1.50%

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Accrued Warranty Reserve (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Dec. 31, 2016	Sep. 30, 2017	Sep. 30, 2016
Maximum period of product warranties		18 months
Provision for warranty expenses		$ 995	$ 775
Balance of warranty provision		3,766
Accrued Warranty Reserve
Balance, beginning of the period		3,766
Standard warranty provision		1,190
Accrual related to reliability repair programs		(195)
Deductions for warranty claims		(2,199)
Balance, end of the period		2,562
C200
Provision for warranty expenses	$ 5,200
Balance of warranty provision		700
Accrued Warranty Reserve
Balance, end of the period		$ 700

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Deferred Revenue (Details) - USD ($) $ in Thousands	6 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Mar. 31, 2017
Deferred Revenue
Increase in deposits	$ 100
Change in balance attributed to FPP contracts	(49)	$ 153
Changes in deferred revenue
Deferred revenue balance, end of the period	4,999		$ 5,050
FPP agreements
Deferred Revenue
Change in balance attributed to FPP contracts	(100)
Changes in deferred revenue
FPP Balance, beginning of the period	3,414
FPP Billings	7,164
FPP Revenue recognized	(7,309)
Balance attributed to FPP contracts	3,269
Deposits	1,730
Deferred revenue balance, end of the period	$ 4,999

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Other Current Liabilities (Details) - Carrier $ in Millions	3 Months Ended		6 Months Ended
	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2017 USD ($) kW	Sep. 30, 2016 USD ($)	Mar. 31, 2017 USD ($)
Other Current Liabilities
Capacity of microturbine (in kW) | kW			200
Royalties earned	$ 0.2	$ 0.1	$ 0.5	$ 0.3
Unpaid earned royalties	$ 0.2		$ 0.2		$ 0.3

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Commitments and Contingencies - Purchase and Lease Commitments (Details) - USD ($)		3 Months Ended		6 Months Ended
	Jun. 07, 2017	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Mar. 31, 2017
Lease Commitments
Renewal option period				5 years
Deferred rent		$ 100,000		$ 100,000		$ 200,000
Rent expense		600,000	$ 600,000	1,100,000	$ 1,200,000
Inventory
Commitments and Contingencies
Commitment to purchase inventories		$ 23,300,000		$ 23,300,000
Van Nuys Fourth Amendment
Lease Commitments
Operating Lease, Extension Term	62 months
Monthly base rent payable for the first agreed period	$ 0
Monthly base rent payable for the second agreed period	66,846
Monthly base rent payable for the third agreed period	68,852
Monthly base rent payable for the fourth agreed period	70,917
Monthly base rent payable for the fifth agreed period	73,045
Monthly base rent payable for the sixth agreed period	75,236
Monthly base rent payable for the seventh agreed period	$ 77,493
Operating Lease, Period Available under Options for Lease Extension	5 years

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Commitments and Contingencies - Other Commitments and Legal Matters (Details)	Jul. 18, 2016 action	Dec. 18, 2015 complaint
Legal matters
Number of putative securities class action complaints filed against the Company | complaint		2
Number of additional purported shareholder derivative actions filed | action	2

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Net Loss Per Common Share - Antidilutive Securities (Details) - shares shares in Millions	6 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Antidilutive stock options and restricted stock units
Net Loss Per Common Share
Antidilutive securities excluded from diluted net loss per common share computations	0.9	0.8
Warrants
Net Loss Per Common Share
Antidilutive securities excluded from diluted net loss per common share computations	10.4	5.5

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Subsequent Events (Details) $ / shares in Units, $ in Millions					3 Months Ended	6 Months Ended	27 Months Ended
	Oct. 27, 2017 USD ($) $ / shares	Oct. 18, 2017 USD ($)	Oct. 13, 2017 USD ($) payment	Sep. 13, 2017 USD ($)	Sep. 30, 2017 USD ($) $ / shares	Sep. 30, 2017 USD ($) $ / shares	Sep. 30, 2017 USD ($) $ / shares	Oct. 26, 2017 $ / shares shares	Aug. 31, 2017 $ / shares	Mar. 31, 2017 $ / shares	Oct. 18, 2016 $ / shares	Apr. 19, 2016 $ / shares shares
Subsequent Event Items
Net proceeds from equity issuances					$ 1.4	$ 4.0	$ 16.8
Common stock, par value (in dollars per share) | $ / shares					$ 0.001	$ 0.001	$ 0.001			$ 0.001
Subsequent event
Subsequent Event Items
Common stock, par value (in dollars per share) | $ / shares	$ 0.001
Reduction of warrants to purchase common stock (as a percent)	19.00%
Turbine International, LLC. and MTE Service | Subsequent event
Subsequent Event Items
Proceeds from sale of distribution rights		$ 6.3
Turbine International, LLC. and MTE Service | Accounts Receivable Agreement
Subsequent Event Items
Proceeds from sale of receivables				$ 0.1
Turbine International, LLC. and MTE Service | Accounts Receivable Agreement | Subsequent event
Subsequent Event Items
Total consideration receivable			$ 2.5
Number of payments to be received | payment			3
Turbine International, LLC. and MTE Service | Promissory Note Agreement | Subsequent event
Subsequent Event Items
Total consideration receivable			$ 3.8
Number of payments to be received | payment			35
Term of payments			3 years
Series A Warrants
Subsequent Event Items
Number of shares of common stock that could be purchased with warrants | shares												4,100,000
Exercise price (in dollars per share) | $ / shares									$ 0.65		$ 1.34	$ 3.50
Series A Warrants | Subsequent event
Subsequent Event Items
Number of shares of common stock that could be purchased with warrants | shares								1,928,750
Exercise price (in dollars per share) | $ / shares								$ 0.90
Net proceeds from equity issuances	$ 1.7