10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM 10-Q

(Mark One)

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

For the quarterly period ended September 30, 2013

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: 001-33471

EnerNOC, Inc.

(Exact Name of Registrant as Specified in Its Charter)

Delaware	87-0698303
(State or Other Jurisdiction of Incorporation or Organization)	(IRS Employer Identification No.)

One Marina Park Drive Suite 400 Boston, Massachusetts	02210
(Address of Principal Executive Offices)	(Zip Code)

(617) 224-9900

(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  x    No  ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes  x    No  ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, 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. (Check one):

Large accelerated filer	¨	Accelerated filer	x
Non-accelerated filer	¨  (Do not check if a smaller reporting company)	Smaller reporting company	¨

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

There were 30,093,235 shares of the registrant’s common stock, $0.001 par value per share, outstanding as of November 1, 2013.

EnerNOC, Inc.

Index to Form 10-Q

		Page
Part I - Financial Information
Item 1.	Financial Statements
	Unaudited Condensed Consolidated Balance Sheets at September 30, 2013 and December 31, 2012		3
	Unaudited Condensed Consolidated Statements of Income for the three and nine months ended September 30, 2013 and 2012		4
	Unaudited Condensed Consolidated Statements of Comprehensive Income for the three and nine months ended September 30, 2013 and 2012		5
	Unaudited Condensed Consolidated Statements of Cash Flows for the nine months ended September 30, 2013 and 2012		6
	Notes to Unaudited Condensed Consolidated Financial Statements		7
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations		23
Item 3.	Quantitative and Qualitative Disclosures About Market Risk		42
Item 4.	Controls and Procedures		43
Part II - Other Information
Item 1.	Legal Proceedings		43
Item 1A	Risk Factors		44
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds		45
Item 6.	Exhibits		46
	Signatures		47

2

EnerNOC, Inc.

UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS

(in thousands, except par value and share data)

	September 30, 2013			December 31, 2012
ASSETS
Current assets
Cash and cash equivalents	$	111,230		$	115,041
Restricted cash		1,363			9
Trade accounts receivable, net of allowance for doubtful accounts of $479 and $487 at September 30, 2013 and December 31, 2012, respectively		61,518			35,208
Unbilled revenue		118,583			45,269
Capitalized incremental direct customer contract costs		3,513			10,226
Deposits		430			2,296
Prepaid expenses and other current assets		6,933			4,640
Total current assets		303,570			212,689
Property and equipment, net of accumulated depreciation of $76,853 and $67,909 at September 30, 2013 and December 31, 2012, respectively		50,062			32,592
Goodwill		78,111			79,505
Customer relationship intangible assets, net		16,183			21,709
Other definite-lived intangible assets, net		3,448			3,915
Capitalized incremental direct customer contract costs, long-term		2,213			3,929
Deposits and other assets		1,483			826
Total assets	$	455,070		$	355,165
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current liabilities
Accounts payable	$	1,709		$	3,976
Accrued capacity payments		96,507			49,258
Accrued payroll and related expenses		11,675			13,044
Accrued expenses and other current liabilities		11,933			8,978
Accrued performance adjustments		1,720			685
Deferred revenue		17,235			20,063
Total current liabilities		140,779			96,004
Deferred acquisition consideration		558			533
Accrued acquisition contingent consideration		446			431
Deferred tax liability		6,379			4,222
Deferred revenue		7,563			11,837
Other liabilities		8,987			2,116
Commitments and contingencies (Notes 7 and 11)		—			—
Stockholders’ equity
Undesignated preferred stock, $0.001 par value; 5,000,000 shares authorized; no shares issued		—			—
Common stock, $0.001 par value; 50,000,000 shares authorized, 30,013,822 and 29,019,923 shares issued and outstanding at September 30, 2013 and December 31, 2012, respectively		30			29
Additional paid-in capital		353,490			344,137
Accumulated other comprehensive loss		(1,689	)		(702	)
Accumulated deficit		(61,473	)		(103,442	)
Total stockholders’ equity		290,358			240,022
Total liabilities and stockholders’ equity	$	455,070		$	355,165

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

3

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF INCOME

(in thousands, except share and per share data)

	Three Months Ended September 30,						Nine Months Ended September 30,
	2013			2012			2013			2012
Revenues:
DemandSMART	$	267,479		$	169,658		$	318,553		$	213,586
EfficiencySMART, SupplySMART and other		10,994			8,289			28,923			22,084
Total revenues		278,473			177,947			347,476			235,670
Cost of revenues		126,072			82,947			172,142			126,437
Gross profit		152,401			95,000			175,334			109,233
Operating expenses:
Selling and marketing		15,761			13,424			50,444			41,342
General and administrative		19,746			18,351			60,872			52,880
Research and development		4,535			3,914			14,125			11,536
Total operating expenses		40,042			35,689			125,441			105,758
Income from operations		112,359			59,311			49,893			3,475
Other income (expense), net		233			619			(884	)		1,316
Interest expense		(451	)		(300	)		(1,212	)		(1,197	)
Income before income tax		112,141			59,630			47,797			3,594
(Provision for) benefit from income tax		(5,284	)		718			(5,828	)		(95	)
Net Income	$	106,857		$	60,348		$	41,969		$	3,499
Net income per share
Basic	$	3.83		$	2.26		$	1.52		$	0.13
Diluted	$	3.70		$	2.21		$	1.47		$	0.13
Weighted average number of common shares used in computing net income per common share
Basic		27,920,409			26,653,252			27,693,054			26,470,634
Diluted		28,843,010			27,325,949			28,616,552			27,069,569

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

4

EnerNOC, Inc.

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(in thousands)

	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013			2012
Net income	$	106,857	$	60,348	$	41,969		$	3,499
Foreign currency translation adjustments		55		172		(987	)		314
Comprehensive income	$	106,912	$	60,520	$	40,982		$	3,813

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

5

EnerNOC, Inc.

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(in thousands)

	Nine Months Ended September 30,
	2013			2012
Cash flows from operating activities
Net income	$	41,969		$	3,499
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation		15,356			13,414
Amortization of acquired intangible assets		5,260			5,438
Stock based compensation expense		11,832			10,018
Excess tax benefit related to exercise of options, restricted stock and restricted stock units		(999	)		—
Impairment of equipment		503			441
Unrealized foreign exchange transaction loss (gain)		2,108			(781	)
Deferred taxes		2,157			—
Non-cash interest expense		234			306
Accretion of fair value of deferred and contingent purchase price consideration related to acquisitions		88			98
Other, net		29			142
Changes in operating assets and liabilities, net of effects of acquisitions:
Accounts receivable, trade		(26,643	)		(29,801	)
Unbilled revenue		(73,308	)		(11,574	)
Prepaid expenses and other current assets		(2,757	)		1,583
Capitalized incremental direct customer contract costs		8,377			(1,209	)
Other assets		(113	)		189
Other noncurrent liabilities		6,884			625
Deferred revenue		(6,677	)		13,122
Accrued capacity payments		47,941			11,092
Accrued payroll and related expenses		(1,103	)		(434	)
Accounts payable, accrued performance adjustments and accrued expenses and other current liabilities		2,321			(3,302	)
Net cash provided by operating activities		33,459			12,866
Cash flows from investing activities
Purchases of property and equipment		(32,925	)		(11,752	)
Change in restricted cash and deposits		(179	)		4,716
Change in long-term assets		—			(111	)
Payment made for acquisition of customer contract		(699	)		—
Net cash used in investing activities		(33,803	)		(7,147	)
Cash flows from financing activities
Proceeds from exercises of stock options		1,369			141
Payments made for buy back of common stock		(5,000	)		—
Excess tax benefit related to exercise of options, restricted stock and restricted stock units		999			—
Net cash (used in) provided by financing activities		(2,632	)		141
Effects of exchange rate changes on cash and cash equivalents		(835	)		11
Net change in cash and cash equivalents		(3,811	)		5,871
Cash and cash equivalents at beginning of period		115,041			87,297
Cash and cash equivalents at end of period	$	111,230		$	93,168
Non-cash financing and investing activities
Issuance of common stock in satisfaction of bonuses	$	154		$	350

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

6

EnerNOC, Inc.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(in thousands, except share and per share data)

1. Description of Business and Basis of Presentation

Description of Business

EnerNOC, Inc. (the Company) was incorporated in Delaware on June 5, 2003. The Company, which operates in a single segment, is a leading provider of energy intelligence software and related solutions. The Company maximizes the full value of energy management for commercial, institutional and industrial end-users of energy, which the Company refers to as its C&I customers, and its electric power grid operator and utility customers by delivering a comprehensive suite of demand-side management services and solutions that reduce real-time demand for electricity, increase energy efficiency, improve energy supply transparency in competitive markets, and mitigate emissions. The Company uses its Network Operations Center (NOC) and comprehensive demand response application, DemandSMART, to remotely manage and reduce electricity consumption across a growing network of C&I customer sites, making demand response capacity available to electric power grid operators and utilities on demand while helping C&I customers achieve energy savings, improved financial results and environmental benefits. To date, the Company has generated revenues primarily from electric power grid operators and utilities that make recurring payments to the Company for managing demand response capacity. The Company shares these recurring payments with its C&I customers in exchange for those C&I customers reducing their power consumption when called upon.

Reclassifications

The Company has reclassified certain amounts in its condensed consolidated balance sheet as of December 31, 2012 resulting in a decrease to both accounts receivable and deferred revenues of $8,042 to properly account for outstanding accounts receivable where the fees had been deferred because they were not fixed or determinable.

Basis of Consolidation

The unaudited condensed consolidated financial statements of the Company include the accounts of its wholly-owned subsidiaries and have been prepared in conformity with accounting principles generally accepted in the United States (GAAP). Intercompany transactions and balances are eliminated upon consolidation.

Subsequent Events Consideration

The Company considers events or transactions that occur after the balance sheet date but prior to the issuance of the financial statements to provide additional evidence relative to certain estimates or to identify matters that require additional disclosure. Subsequent events have been evaluated as required.

There were no material recognizable subsequent events recorded or requiring disclosure in the September 30, 2013 unaudited condensed consolidated financial statements.

Use of Estimates in Preparation of Financial Statements

The accompanying unaudited condensed consolidated financial statements have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission (SEC). Certain information and footnote disclosures normally included in financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to SEC rules and regulations. In the opinion of the Company’s management, the unaudited condensed consolidated financial statements and notes have been prepared on the same basis as the audited consolidated financial statements contained in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2012, and include all adjustments (consisting of normal, recurring adjustments) necessary for the fair presentation of the Company’s financial position at September 30, 2013 and statements of income, statements of comprehensive income and statements of cash flows for the three and nine month periods ended September 30, 2013 and 2012. Operating results for the three and nine month periods ended September 30, 2013 are not necessarily indicative of the results to be expected for any other interim period or the entire fiscal year ending December 31, 2013 (fiscal 2013).

7

The preparation of these unaudited condensed consolidated financial statements requires the Company to make estimates and judgments that affect the reported amounts of assets, liabilities, revenues and expenses, and related disclosure of contingent assets and liabilities. On an on-going basis, the Company evaluates its estimates, including those related to revenue recognition, allowance for doubtful accounts, valuations and purchase price allocations related to business combinations, fair value of deferred acquisition consideration, fair value of accrued acquisition contingent consideration, expected future cash flows including growth rates, discount rates, terminal values and other assumptions and estimates used to evaluate the recoverability of long-lived assets and goodwill, estimated fair values of intangible assets and goodwill, amortization methods and periods, certain accrued expenses and other related charges, stock-based compensation, contingent liabilities, fair value of asset retirement obligations, tax reserves and recoverability of the Company’s net deferred tax assets and related valuation allowance.

Although the Company regularly assesses these estimates, actual results could differ materially. Changes in estimates are recorded in the period in which they become known. The Company bases its estimates on historical experience and various other assumptions that it believes to be reasonable under the circumstances. Actual results may differ from management’s estimates if these results differ from historical experience or other assumptions prove not to be substantially accurate, even if such assumptions are reasonable when made.

The Company is subject to a number of risks similar to those of other companies of similar and different sizes both inside and outside of its industry, including, but not limited to, rapid technological changes, competition from similar energy management applications, services and products provided by larger companies, customer concentration, government regulations, market or program rule changes, protection of proprietary rights and dependence on key individuals.

Foreign Currency Translation

Foreign currency translation adjustments are recorded as a component of other comprehensive income (loss) and included in accumulated other comprehensive loss within stockholders’ equity. Gains (losses) arising from transactions denominated in foreign currencies and the re-measurement of certain intercompany receivables and payables are included in other income (expense), net in the unaudited condensed consolidated statements of income and were $167 and $580 for the three month periods ended September 30, 2013 and 2012, respectively, and ($1,156) and $1,168 for the nine month periods ended September 30, 2013 and 2012, respectively. Foreign currency exchange (losses) gains resulted primarily from foreign denominated intercompany receivables held by the Company from one of its Australian subsidiaries which mainly resulted from funding provided to complete the acquisition of Energy Response Holdings Pty Ltd (Energy Response) and fluctuations in the Australian dollar exchange rate. During the three and nine month periods ended September 30, 2013, $333 ($375 Australian) and $12,142 ($11,796 Australian), respectively, of the intercompany receivable from the Company’s Australian subsidiary were settled through repayments resulting in a realized loss of $54 and $402, respectively. During the three month period ended September 30, 2012, there was no settlement of the intercompany receivable from the Company’s Australian subsidiary. During the nine month period ended September 30, 2012, $17,468 ($16,400 Australian) of the intercompany receivable from the Company’s Australian subsidiary was settled resulting in a realized gain of $494. During the three month periods ended September 30, 2013 and 2012, there were no other material realized gains (losses) incurred related to transactions denominated in foreign currencies. As of September 30, 2013, the Company’s intercompany receivable balance from its Australian subsidiary that is denominated in Australian dollars and not deemed to be of a “long-term investment” nature totaled $16,587 at September 30, 2013 exchange rates ($17,802 Australian). The increase in the Australian intercompany receivable from June 30, 2013 was due to royalties due to the U.S. parent for services and technology provided by the U.S. parent.

In addition, a portion of the funding provided by the Company to one of its Australian subsidiaries to complete the acquisition of Energy Response was deemed to be of a “long-term investment” nature and therefore, the resulting translation adjustments are being recorded as a component of stockholders’ equity within accumulated other comprehensive loss. As of September 30, 2013, the intercompany funding that is denominated in Australian dollars and deemed to be of a “long-term investment” nature totaled $18,975 at September 30, 2013 exchange rates ($20,364 Australian) and during the three and nine month periods ended September 30, 2013, the Company recorded translation adjustments of $377 and $2,150, respectively, related to this intercompany funding within accumulated other comprehensive loss.

Comprehensive Income

Comprehensive income is defined as the change in equity of a business enterprise during a period resulting from transactions and other events and circumstances from non-owner sources. As of September 30, 2013 and 2012, accumulated other comprehensive loss was comprised solely of cumulative foreign currency translation adjustments. The Company presents its components of other comprehensive income, net of related tax effects, which have not been material to date.

8

Software Development Costs

Software development costs, including license fees and external consulting costs, of $1,523 and $1,203 for the three month periods ended September 30, 2013 and 2012, respectively, and $5,835 and $3,497 for the nine month periods ended September 30, 2013 and 2012, respectively, have been capitalized in accordance with Accounting Standard Codification (ASC) 350-40 (ASC 350-40), Internal-Use Software. The capitalized amount was included as software in property and equipment at September 30, 2013 and December 31, 2012. Amortization of capitalized internal use software costs was $1,434 and $1,185 for the three month periods ended September 30, 2013 and 2012, respectively, and $4,186 and $3,364 for the nine month periods ended September 30, 2013 and 2012, respectively. Accumulated amortization of capitalized internal use software costs was $19,895 and $15,709 as of September 30, 2013 and December 31, 2012, respectively. The Company anticipates that the amount of software development costs that are capitalized in accordance with ASC 350-40 will increase modestly for the foreseeable future in proportion to overall research and development spending as the Company continues its development and significant enhancement of its DemandSMART, EfficiencySMART and SupplySMART applications.

Impairment of Property and Equipment

During the three and nine month periods ended September 30, 2013, as a result of the removal of certain demand response equipment from service, the Company concluded that there were no expected future direct cash flows associated with this demand response equipment and therefore, an impairment indicator existed. The Company determined that the residual value of this demand response equipment was nominal and as a result, recorded an impairment charge during the three and nine month periods ended September 30, 2013 of $264 and $503, respectively, to reduce the carrying value of such equipment to zero. During the three and nine month periods ended September 30, 2012, the company recognized impairment charges of $98 and $441, respectively.

Industry Segment Information

The Company operates in the major geographic areas noted in the chart below. The “All other” designation includes Canada, New Zealand and the United Kingdom. Revenues are based upon customer location and internationally totaled $52,908 and $21,899 for the three month periods ended September 30, 2013 and 2012, respectively, and totaled $66,952 and $28,250 for the nine month periods ended September 30, 2013 and 2012, respectively.

Revenues by geography as a percentage of total revenues are as follows:

	Three Months Ended September 30,						Nine Months Ended September 30,
	2013			2012			2013			2012
United States		81	%		88	%		81	%		88	%
Australia		16			10			14			7
All other		3			2			5			5
Total		100	%		100	%		100	%		100	%

As of September 30, 2013 and December 31, 2012, the long-lived assets related to the Company’s international subsidiaries were not material to the accompanying unaudited condensed consolidated financial statements taken as a whole.

9

2. Intangible Assets and Goodwill

Definite-Lived Intangible Assets

The following table provides the gross carrying amount and related accumulated amortization of intangible assets as of September 30, 2013 and December 31, 2012:

			As of September 30, 2013					As of December 31, 2012
	Weighted Average Amortization Period (in years)		Gross Carrying Amount		Accumulated Amortization			Gross Carrying Amount		Accumulated Amortization
Customer relationships		3.29	$	30,589		(14,406	)	$	32,667	$	(10,958	)
Customer contracts		3.41	$	4,917	$	(2,730	)	$	4,218	$	(2,420	)
Employment agreements and non-compete agreements		0.47		1,717		(1,394	)		1,728		(1,115	)
Software		—		120		(120	)		120		(120	)
Developed Technology		1.06		2,283		(1,611	)		2,300		(1,161	)
Trade name		0.38		575		(426	)		575		(340	)
Patents		6.40		180		(63	)		180		(50	)
Total other definite-lived intangible assets				9,792		(6,344	)		9,121		(5,206	)
Total			$	40,381	$	(20,750	)	$	41,788	$	(16,164	)

The change in the Company’s customer contracts intangible assets from December 31, 2012 to September 30, 2013 was primarily due to the acquisition of a single intangible asset during the three month period ended September 30, 2013 representing the acquisition of a three year contractual obligation for the delivery of additional demand response capacity in the Western Australia market commencing on October 1, 2013 for a purchase price of $699. The acquisition of this single intangible asset did not meet the definition of a business, as defined in ASC 805, Business Combinations, due to the fact neither processes nor the additional inputs required to combine with this intangible asset in order to be capable of producing outputs were acquired. Therefore, the acquisition of this intangible asset was accounted for as an asset acquisition based on the principles described in ASC 850-50 and the entire purchase price, which was less than the estimated fair value, was allocated to this intangible asset. This intangible asset is being amortized to cost of revenues based on the expected pattern of economic benefit over the applicable contractual period. The decrease in other intangible assets from December 31, 2012 to September 30, 2013, excluding the acquisition of the customer contract, was due to foreign currency translation adjustments

Amortization expense related to intangible assets amounted to $1,703 and $1,808 for the three month periods ended September 30, 2013 and 2012, respectively, and $5,260 and $5,438 for the nine month periods ended September 30, 2013 and 2012, respectively. Amortization expense for developed technology, which was $138 and $161 for the three month periods ended September 30, 2013 and 2012, respectively, and $416 and $483 for the nine month periods ended September 30, 2013 and 2012, respectively, is included in cost of revenues in the accompanying unaudited condensed consolidated statements of income. Amortization expense for all other intangible assets is included as a component of operating expenses in the accompanying unaudited condensed consolidated statements of income. The intangible asset lives range from one to ten years and the weighted average remaining life was 3.0 years at September 30, 2013. Estimated amortization is expected to be $1,870, $6,557, $4,567, $3,922 and $2,715 for the three month period ending December 31, 2013, and years ending 2014, 2015, 2016 and 2017, respectively.

Goodwill

In accordance with ASC 350, Intangibles—Goodwill and Other, the Company tests goodwill at the reporting unit level for impairment on an annual basis and between annual tests if events and circumstances indicate it is more likely than not that the fair value of a reporting unit is less than its carrying value. The Company’s annual impairment test date is November 30. The Company has determined that it currently has two reporting units: (1) the consolidated Australian operations, which represents the Company’s Australia and New Zealand operations, and (2) all other operations. During the three month period ended September 30, 2013, there were no potential impairment indicators identified that required an interim impairment test of goodwill. The Company’s market capitalization as of September 30, 2013 exceeded the book value of its consolidated net assets by more than 100%. In addition, as of November 30, 2012 the fair value of both the Company’s consolidated Australian reporting unit and the Company’s all other operations reporting unit exceeded each of their respective carrying values by more than 50%.

The following table shows the change of the carrying amount of goodwill from December 31, 2012 to September 30, 2013:

Balance at December 31, 2012	$	79,505
Foreign currency translation		(1,394	)
Balance at September 30, 2013	$	78,111

10

3. Net Income Per Share

A reconciliation of basic and diluted share amounts for the three and nine month periods ended September 30, 2013 and 2012 are as follows (shares in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
Basic weighted average common shares outstanding		27,920		26,653		27,693		26,471
Weighted average common stock equivalents		923		673		924		599
Diluted weighted average common shares outstanding		28,843		27,326		28,617		27,070
Weighted average anti-dilutive shares related to:
Stock options		—		—		1		1
Nonvested restricted shares		54		354		336		632
Restricted stock units		—		154		9		225

In reporting periods in which the Company reports net income, anti-dilutive shares consist of those common stock equivalents that have either an exercise price above the average stock price for the period or the common stock equivalents’ related average unrecognized stock compensation expense is sufficient to “buy back” the entire amount of shares. In those reporting periods in which the Company has a net loss, anti-dilutive shares consist of the impact of those number of shares that would have been dilutive had the Company had net income plus the number of common stock equivalents that would have been anti-dilutive had the Company had net income.

The Company excludes the shares issued in connection with restricted stock awards from the calculation of basic weighted average common shares outstanding until such time as those shares vest. In addition, with respect to restricted stock awards that vest based on achievement of performance conditions, because performance conditions are considered contingencies under ASC 260, Earnings per Share, the criteria for contingent shares must first be applied before determining the dilutive effect of these types of share-based payments. Prior to the end of the contingency period (i.e., before the performance conditions have been satisfied), the number of contingently issuable common shares to be included in diluted weighted average common shares outstanding should be based on the number of common shares, if any, that would be issuable under the terms of the arrangement if the end of the reporting period were the end of the contingency period (e.g., the number of shares that would be issuable based on current performance criteria) assuming the result would be dilutive.

In connection with certain of the Company’s business combinations, the Company issued common shares that were held in escrow upon closing of the applicable business combination. The Company excludes shares held in escrow from the calculation of basic weighted average common shares outstanding where the release of such shares is contingent upon an event and not solely subject to the passage of time. The 254,654 shares related to a component of the deferred purchase price consideration from the acquisition of M2M Communications Corporation (M2M), which are not subject to adjustment as the issuance of such shares is not subject to any contingency, are included in both the basic and diluted weighted average common shares outstanding.

In January 2013, the Company released 46,506 shares of common stock held in escrow related to the Energy Response acquisition in accordance with the provisions within the relevant escrow agreement.

4. Disclosure of Fair Value of Financial Instruments

The Company’s financial instruments mainly consist of cash and cash equivalents, restricted cash, accounts receivable and accounts payable. The carrying amounts of the Company’s cash equivalents, restricted cash, accounts receivable and accounts payable approximate their fair value due to the short-term nature of these instruments.

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5. Fair Value Measurements

The tables below present the balances of assets and liabilities measured at fair value on a recurring basis at September 30, 2013 and December 31, 2012:

	Fair Value Measurement at September 30, 2013 Using
	Totals		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Unobservable Inputs (Level 3)
Assets:
Money markets (1)	$	98,128	$	98,128	$	—	$	—
Liabilities:
Deferred acquisition consideration (2)	$	558	$	—	$	—	$	558
Accrued acquisition contingent consideration (2)		446		—		—		446
	$	1,004	$	—	$	—	$	1,004

(1) Included in cash and cash equivalents in the accompanying unaudited condensed consolidated balance sheets. Increase in investments [in money market funds] from December 31, 2012 is due to an overnight enterprise investment sweep from the Company’s main operating account which was implemented in July 2013.

(2) Deferred acquisition consideration and accrued acquisition contingent consideration, which are liabilities and were the result of the Company’s acquisition of M2M and Energy Response, respectively, represent the only assets or liabilities that the Company measured and recorded at fair value on a recurring basis using significant unobservable inputs (Level 3). The aggregate increase in fair value of liabilities for the nine month period ended September 30, 2013 of $40 was due to the increase in the liabilities as a result of the amortization of the applicable discounts related to the time value of money of $88 and changes in exchange rates. There were no changes to the probability or timing of payment during the nine month period ended September 30, 2013.

	Fair Value Measurement at December 31, 2012 Using
	Totals		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Unobservable Inputs (Level 3)
Liabilities:
Deferred acquisition consideration (1)	$	533	$	—	$	—	$	533
Accrued acquisition contingent consideration (1)		431		—		—		431
	$	964	$	—	$	—	$	964

(1) Deferred acquisition consideration and accrued acquisition contingent consideration, which are liabilities that were the result of the Company’s acquisition of M2M and Energy Response, respectively, represented the only assets or liabilities that the Company measured and recorded at fair value on a recurring basis using significant unobservable inputs (Level 3).

6. Financing Arrangements

In March 2012, the Company and one of its subsidiaries entered into a $50,000 credit facility with Silicon Valley Bank (SVB), which was subsequently amended in June 2012 and April 2013 (the 2012 credit facility). On April 12, 2013, the Company, one its subsidiaries and SVB entered into an amendment to the 2012 credit facility to extend the termination date from April 15, 2013 to April 30, 2013. On April 18, 2013, the Company, one of its subsidiaries and SVB terminated the 2012 credit facility.

On April 18, 2013, the Company entered into a $70,000 senior secured revolving credit facility with the several lenders from time to time party thereto and SVB, as administrative agent, swingline lender, issuing lender, lead arranger and book manager (SVB and together with the other lenders, “the lenders”), which was subsequently amended in August 2013 (the 2013 credit facility). The 2013 credit facility replaced the 2012 credit facility.

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The 2013 credit facility provides for a two year revolving line of credit in the aggregate amount of $70,000, subject to increase from time to time up to an aggregate amount of $100,000 with an additional commitment from the lenders or new commitments from new financial institutions. The material changes in the 2013 credit facility’s monthly and quarterly financial covenants as compared to the financial covenants contained in the 2012 credit facility include:

• a change in the Company’s quarterly financial covenant, previously based on specified minimum earnings levels, to one based on specified free cash flow levels. The specified minimum free cash flow financial covenant is based on earnings before depreciation and amortization expense, interest expense and income, provision for income taxes, stock-based compensation expense, certain impairment charges and certain other non-cash charges or unusual gains over a trailing twelve month period less the sum of capital expenditures, cash paid for interest expense and cash paid for income taxes over the same trailing twelve month period;

• a change to the Company’s monthly financial covenant related to maintenance of a minimum specified ratio of current assets to current liabilities, increasing the Company’s required minimum of unrestricted cash from $30,000 to $45,000 for certain periods; and

• inclusion of a borrowing base covenant that limits the amount of borrowings, including letters of credit, under the 2013 credit facility based on a specified calculation. This borrowing base covenant is effective through the required filing date of the Company’s September 30, 2013 unaudited condensed consolidated financial statements with the SEC on Form 10-Q, as well as for any period in which the Company’s unrestricted cash falls below $70,000.

Subject to continued compliance with the covenants contained in the 2013 credit facility, the full amount of the 2013 credit facility may be available for issuances of letters of credit and up to $5,000 may be available for swing line loans. The interest on revolving loans under the 2013 credit facility will accrue, at the Company’s election, at either (i) the Eurodollar Rate with respect to the relevant interest period plus 2.00% per annum or (ii) the ABR (defined as the highest of (x) the “prime rate” as quoted in the Wall Street Journal, and (y) the Federal Funds Effective Rate plus 0.50%) plus 1.00% per annum. The letter of credit fee charged under the 2013 credit facility is consistent with the 2012 credit facility letter of credit fee of 2.00%. The Company expenses the interest and letter of credit fees under the 2013 credit facility, as applicable, in the period incurred. The obligations under the 2013 credit facility are secured by all domestic assets of the Company and several of its domestic subsidiaries. The 2013 credit facility terminates on April 18, 2015 and all amounts outstanding thereunder will become due and payable in full and the Company would be required to collateralize with cash any outstanding letter of credit under the 2013 credit facility up to 105% of the amounts outstanding. The Company incurred financing costs of $111 in connection with the 2012 credit facility, which were deferred and were amortized to interest expense over the term of the 2012 credit facility, or through April 15, 2013. In connection with the 2013 credit facility, the Company incurred financing costs of approximately $540 which have been deferred and are being amortized to interest expense over the term of the 2013 credit facility, or through April 18, 2015.

The 2013 credit facility contains customary terms and conditions for credit facilities of this type, including, among other things, restrictions on the ability of the Company and its subsidiaries to incur additional indebtedness, create liens, enter into transactions with affiliates, transfer assets, make certain acquisitions, pay dividends or make distributions on, or repurchase, the Company’s common stock, consolidate or merge with other entities, or undergo a change in control. In addition and as described above, the Company is required to meet certain monthly and quarterly financial covenants customary for this type of credit facility, including maintaining minimum specified level of free cash flow, a minimum specified unrestricted cash balance and a minimum specified ratio of current assets to current liabilities.

The 2013 credit facility contains customary events of default, including payment defaults, breaches of representations, breaches of affirmative or negative covenants, cross defaults to other material indebtedness, bankruptcy and failure to discharge certain judgments. If a default occurs and is not cured within any applicable cure period or is not waived, SVB may accelerate the Company’s obligations under the 2013 credit facility. If the Company is determined to be in default then any amounts outstanding under the 2013 credit facility would become immediately due and payable and the Company would be required to collateralize with cash any outstanding letters of credit up to 105% of the amounts outstanding.

In May 2013, the Company was required to provide financial assurance in connection with its capacity bid in a certain open market bidding program. The Company provided this financial assurance utilizing a $22,700 letter of credit issued under the 2013 credit facility and a portion of its available unrestricted cash on hand. During the three month period ended June 30, 2013, based on the capacity that the Company cleared in the above open market bidding program and the required post-auction financial assurance requirements, the Company recovered all of its available cash that it had provided as financial assurance prior to the auction and $6,200 of the letter of credit was cancelled. In July 2013, $10,000 of outstanding letters of credit were cancelled as a result of the reduction of post-auction financial assurance requirements related to capacity that the Company cleared in an open market bidding program.

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On August 2, 2013, the Company entered into an amendment to the 2013 credit facility. This amendment provided for an increase to the maximum dollar amount of shares of common stock that the Company may repurchase or redeem from its public stockholders without the consent of SVB.

As of September 30, 2013, the Company was in compliance with all of its covenants under the 2013 credit facility. The Company believes that it is reasonably assured that it will comply with the covenants of the 2013 credit facility for the foreseeable future.

As of September 30, 2013, the Company had no borrowings, but had outstanding letters of credit totaling $49,915, under the 2013 credit facility. The increase in the amount of outstanding letters of credit from December 31, 2012 to September 30, 2013 is primarily as a result of additional letters of credit issued as collateral for new demand response arrangements and obligations. As of September 30, 2013, the Company had $20,085 available under the 2013 credit facility for future borrowings or issuances of additional letters of credit.

7. Commitments and Contingencies

In July 2012, the Company entered into a lease for its new principal executive offices at One Marina Park Drive, Floors 4-6, Boston, Massachusetts (the New Lease). The New Lease term is through July 2020 and the New Lease contains both a rent holiday period and escalating rental payments over the New Lease term. The New Lease requires payments for additional expenses such as taxes, maintenance, and utilities and contains a fair value renewal option. The Company began occupying the space during the second quarter of fiscal 2013. In accordance with the terms of the New Lease, the landlord provided certain lease incentives with respect to the leasehold improvements. In accordance with ASC 840, Leases, the Company recorded the incentives as deferred rent and will reflect these amounts as reductions of lease expense over the lease term. During the three and nine month periods ended September 30, 2013, the Company recorded $800 and $4,919, respectively, as deferred rent related to landlord lease incentives. Although lease payments under this arrangement did not commence until August 2013, as the Company had the right to use and controls physical access to the space, it determined that the lease term commenced in July 2012 and, as a result, began recording rent expense on this lease arrangement at that time on a straight-line basis. The New Lease also contains certain provisions requiring the Company to restore certain aspects of the leased space to its initial condition. The Company has determined that these provisions represent asset retirement obligations and recorded the estimated fair value of these obligations as the related leasehold improvements were incurred. The Company will accrete the liability to fair value over the life of the lease as a component of operating expenses. As of September 30, 2013, the Company recorded an asset retirement obligation of $403. The decrease in asset retirement obligation from June 30, 2013 is due to completion and settlement of restoration activities related to the Company’s former principal executive offices during the three month period ended September 30, 2013.

As of September 30, 2013 and December 31, 2012, the Company had a deferred rent liability representing rent expense recorded on a straight-line basis in excess of contractual lease payments of $7,871and $1,049, respectively, which is included in other liabilities in the accompanying unaudited condensed consolidated balance sheets.

As of September 30, 2013, the Company was contingently liable under outstanding letters of credit for $49,915. As of September 30, 2013 and December 31, 2012, the Company had restricted cash balances of $1,363 and $9. The restricted cash balance as of September 30, 2013 primarily relate to cash utilized to collateralize certain demand response programs. The restricted cash balance as of December 31, 2012 relates to collateral to secure certain insurance commitments.

The Company is subject to performance guarantee requirements under certain utility and electric power grid operator customer contracts and open market bidding program participation rules, which may be secured by cash or letters of credit. Performance guarantees as of September 30, 2013 were $51,389 and included deposits held by certain customers of $224 and certain restricted cash utilized to collateralize certain demand response programs of $1,250 at September 30, 2013. These amounts primarily represent up-front payments required by utility and electric power grid operator customers as a condition of participation in certain demand response programs and to ensure that the Company will deliver its committed capacity amounts in those programs. If the Company fails to meet its minimum committed capacity requirements, a portion or all of the deposits may be forfeited. The Company assessed the probability of default under these customer contracts and open market bidding programs and has determined the likelihood of default and loss of deposits to be remote. In addition, under certain utility and electric power grid operator customer contracts, if the Company does not achieve the required performance guarantee requirements, the customer can terminate the arrangement and the Company would potentially be subject to termination penalties. Under these arrangements, the Company defers all fees received up to the amount of the potential termination penalty until the Company has concluded that it can reliably determine that the potential termination penalty will not be incurred or the termination penalty lapses. As of September 30, 2013, the Company had $1,020 in deferred fees for these arrangements which were included in deferred revenues as of September 30, 2013. As of September 30, 2013, the maximum termination penalty to which the Company could be subject under these arrangements, which the Company has deemed not probable of being incurred, was approximately $8,729.

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As of September 30, 2013 and December 31, 2012, the Company accrued in the accompanying unaudited condensed consolidated balance sheets $1,720 and $685, respectively, of performance adjustments related to fees received for its participation in a certain demand response program. The Company believes that it is probable that these performance adjustments will need to be re-paid to the electric power grid operator and since the electric power grid operator has the right to require repayment at any point at its discretion, the amounts have been classified as a current liability.

In 2012, the Company decided to net settle a portion of its future contractual delivery obligations in a certain open market bidding program. As of September 30, 2013, the Company entered into transactions to net settle a significant portion of its future delivery obligations and these transactions have been approved by the customer as of September 30, 2013. As a result, as long as the other criteria for revenue recognition are met, the Company will recognize these fees from the net settlement transactions as revenues as they become due and payable with such fees being recorded as a component of DemandSMART revenues. During the three and nine month periods ended September 30, 2013, the Company recognized revenues of $3,882 and $4,717, respectively, related to these net settlement transactions. During the three and nine month periods ended September 30, 2013, the Company did not incur any material charges or liabilities related to this matter. Furthermore, the Company does not expect that any additional charges or liabilities will be material to the Company’s consolidated results of operations and anticipates that additional charges or liabilities, if any, would be substantially incurred and recorded within the Company’s consolidated results of operations for fiscal 2013.

The Company typically grants customers a limited warranty that guarantees that its hardware will substantially conform to current specifications for one year from the delivery date. Based on the Company’s operating history, the liability associated with product warranties has been determined to be nominal.

In connection with the Company’s agreement for its employee health insurance plan, the Company could be subject to an additional payment if the agreement is terminated. The Company has not elected to terminate this agreement nor does the Company believe that termination is probable for the foreseeable future. As a result, the Company has determined that it is not probable that a loss is likely to occur and no amounts have been accrued related to this potential payment upon termination. As of September 30, 2013, the payment due upon termination would be $1,126.

8. Stockholders’ Equity

Share Repurchase Program

On August 6, 2013, the Company’s Board of Directors authorized the repurchase of up to $30,000 of the Company’s common stock during the period from August 6, 2013 through August 6, 2014, unless earlier terminated by the Board of Directors. During the three month period ended September 30, 2013, the Company repurchased 330,843 shares of the Company’s common stock at a weighted-average purchase price of $15.11 per share for a total cost of $5,000. All shares were retired upon repurchase.

Stock Based Compensation

During the nine month periods ended September 30, 2013 and 2012, the Company issued 8,920 shares and 44,871 shares of its common stock, respectively, to certain executives to satisfy a portion of the Company’s bonus obligation to these individuals. Historically, the Company’s Amended and Restated 2007 Employee, Director and Consultant Stock Plan (the 2007 Plan) contained an “evergreen” provision, which provided for an annual increase to the shares issuable under the 2007 Plan by an amount equal to the lesser of 520,000 shares or an amount determined by the Company’s board of directors. The annual increase to the 2007 Plan of 520,000 shares occurred during the three month period ended March 31, 2013. On May 28, 2013, the Company’s shareholders approved an amendment and restatement of the 2007 Plan to, among other things, increase the number of shares of common stock authorized for issuance under the 2007 Plan by 2,500,000 shares and eliminate the evergreen provision. As of September 30, 2013, 2,750,078 shares were available for future grant under the 2007 Plan, as amended and restated.

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Stock Options

The fair value of options granted was estimated at the date of grant using the following weighted average assumptions:

	Nine Months Ended September 30,
	2013			2012
Risk-free interest rate		1.8	%		1.8	%
Vesting term, in years		2.22			2.22
Expected annual volatility		75	%		78	%
Expected dividend yield		—	%		—	%
Exit rate pre-vesting		7.7	%		8.0	%
Exit rate post-vesting		14.06	%		14.06	%

The risk-free interest rate is the rate available as of the option date on zero-coupon United States government issues with a term equal to the expected life of the option. Volatility measures the amount that a stock price has fluctuated or is expected to fluctuate during a period. The Company calculates volatility using a component of implied volatility and historical volatility to determine the value of share-based payments. The Company has not paid dividends on its common stock in the past and does not plan to pay any dividends in the foreseeable future. In addition, the terms of the 2013 credit facility preclude the Company from paying dividends. During the three month period ended September 30, 2013, the Company updated its estimated pre-vesting and post-vesting exit rates applied to options, restricted stock and restricted stock units based on an evaluation of demographics of its employee groups and historical forfeitures for these groups in order to determine its option valuations as well as its stock-based compensation expense noting no change in the exit-rate post vesting and no material changes in the expected annual volatility or exit rate pre-vesting. The changes in estimates of the volatility and exit rate pre-vesting did not have a material impact on the Company’s stock-based compensation expense recorded in the accompanying unaudited condensed consolidated statements of income for the three and nine month periods ended September 30, 2013.

In June 2013, in connection with the departure of the Company’s former Executive Vice President, certain unvested share-based payments were forfeited. This individual forfeited 159,028 shares of restricted common stock and 12,500 restricted stock units. As a result, during the nine month period ended September 30, 2013, the Company reversed approximately $476 of stock-based compensation expense that had been recognized in prior periods related to the portion of these unvested share-based payments that had been previously expected to vest.

In August 2013, in connection with the Company’s Chief Accounting Officer providing notice of his resignation, certain unvested share-based payments that were previously deemed probable of vesting became improbable of vesting. As a result, during the three and nine month periods ended September 30, 2013, the Company reversed approximately $70 of stock-based compensation expense that had been recognized in prior periods related to the portion of these unvested share-based payments that had been previously expected to vest.

The components of stock based compensation expense are disclosed below:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
Stock options	$	333	$	471	$	1,081	$	1,584
Restricted stock and restricted stock units		3,488		2,870		10,751		8,434
Total	$	3,821	$	3,341	$	11,832	$	10,018

Stock based compensation is recorded in the accompanying unaudited condensed consolidated statements of income, as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
Selling and marketing expenses	$	1,426	$	1,182	$	4,272	$	3,428
General and administrative expenses		2,049		1,908		6,521		5,712
Research and development expenses		346		251		1,039		878
Total	$	3,821	$	3,341	$	11,832	$	10,018

The Company recognized an income tax benefit from share-based compensation arrangements of $999 during the three and nine month periods ended September 30, 2013. The Company recognized no material income tax benefit from share-based compensation arrangements during the three and nine month periods ended September 30, 2012. No material compensation cost was capitalized during the three and nine month periods ended September 30, 2013 and 2012.

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The following is a summary of the Company’s stock option activity during the nine month period ended September 30, 2013:

	Nine Months Ended September 30, 2013
	Number of Shares Underlying Options			Exercise Price Per Share	Weighted- Average Exercise Price Per Share		Aggregate Intrinsic Value
Outstanding at December 31, 2012		1,275,311		$0.17 - $48.06	$	16.26	$	2,915	(2)
Granted		4,000				16.34
Exercised		(163,332	)			8.39	$	1,290	(3)
Cancelled		(36,388	)			22.41
Outstanding at September 30, 2013		1,079,591		$0.17 - $48.06		17.24	$	4,107	(4)
Weighted average remaining contractual life in years: 3.2
Exercisable at end of period		1,006,039		$0.17 - $48.06	$	16.68	$	4,061	(4)
Weighted average remaining contractual life in years: 3.0
Vested or expected to vest at September 30, 2013 (1)		1,075,506		$0.17 - $48.06	$	17.24	$	4,101	(4)

(1) This represents the number of vested options as of September 30, 2013 plus the number of unvested options expected to vest as of September 30, 2013 based on the unvested options outstanding at September 30, 2013, adjusted for the estimated forfeiture rate of 7.7%.

(2) The aggregate intrinsic value was calculated based on the positive difference between the estimated fair value of the Company’s common stock on December 31, 2012 of $11.75 and the exercise price of the underlying options.

(3) The aggregate intrinsic value was calculated based on the positive difference between the fair value of the Company’s common stock on the applicable exercise dates and the exercise price of the underlying options.

(4) The aggregate intrinsic value was calculated based on the positive difference between the estimated fair value of the Company’s common stock on September 30, 2013 of $14.98 and the exercise price of the underlying options.

Additional Information About Stock Options

	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
	In thousands, except share and per share amounts				In thousands, except share and per share amounts
Total number of options granted during the period		500		5,100		4,000		10,550
Weighted-average fair value per share of options granted	$	8.68	$	6.15	$	10.15	$	5.37
Total intrinsic value of options exercised (1)	$	239	$	209	$	1,290	$	1,139

(1) Represents the difference between the market price at exercise and the price paid to exercise the options.

Of the stock options outstanding as of September 30, 2013, 1,071,098 options were held by employees and directors of the Company and 8,493 options were held by non-employees. For outstanding unvested stock options related to employees and directors of the Company as of September 30, 2013, the Company had $647 of unrecognized stock-based compensation expense, which is expected to be recognized over a weighted average period of 0.9 years. There were no unvested non-employee stock options as of September 30, 2013.

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Restricted Stock and Restricted Stock Units

For non-vested restricted stock and restricted stock units subject to service-based vesting conditions outstanding as of September 30, 2013, the Company had $15,923 of unrecognized stock-based compensation expense, which is expected to be recognized over a weighted average period of 3.0 years. For non-vested restricted stock subject to performance-based vesting conditions outstanding that were probable of vesting as of September 30, 2013, the Company had $5,528 of unrecognized stock-based compensation expense, which is expected to be recognized over a weighted average period of 1.7 years. For non-vested restricted stock subject to outstanding performance-based vesting conditions that were not probable of vesting as of September 30, 2013, the Company had $96 of unrecognized stock-based compensation expense. If and when any additional portion of the equity awards are deemed probable to vest, the Company will reflect the effect of the change in estimate in the period of change by recording a cumulative catch-up adjustment to retroactively apply the new estimate.

Restricted Stock

The following table summarizes the Company’s restricted stock activity during the nine month period ended September 30, 2013:

	Number of Shares			Weighted Average Grant Date Fair Value Per Share
Nonvested at December 31, 2012		2,135,496		$	9.78
Granted		1,491,269			16.47
Vested		(833,521	)		11.06
Cancelled		(395,382	)		11.36
Nonvested at September 30, 2013		2,397,862		$	13.27

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All shares underlying awards of restricted stock are restricted in that they are not transferable until they vest. Restricted stock typically vests ratably over a four-year period from the date of issuance, with certain exceptions. Included in the above table are 26,353 shares of restricted stock granted to certain non-executive employees and 30,740 shares of restricted stock granted to certain members of the Company’s board of directors during the nine month period ended September 30, 2013 that were immediately vested. Also included in the table above, are shares of restricted stock granted to non-employee advisory board members. During the three and nine month periods ended September 30, 2013, the Company granted 11,000 and 33,000 shares, respectively, of restricted stock to non-employee advisory board members. Of the 33,000 shares of restricted stock granted, 22,000 shares of restricted stock vest ratably on a quarterly basis over four years and 11,000 shares of restricted stock vest in equal annual tranches on July 1, 2014 and July 1, 2015, as long as the individuals continue to serve as advisory board members through the date of the applicable vesting. The Company will account for these share-based awards in accordance with ASC 505-50, Equity Based Payments to Non-Employees, which will result in the Company continuing to re-measure the fair value of the share-based awards until such time as the awards vest. During the three and nine month periods ended September 30, 2013, the Company recorded stock-based compensation expense related to these awards of $37 and $52, respectively. As of September 30, 2013 the awards had a fair value of $493.

The fair value of restricted stock upon which vesting is solely service-based is expensed ratably over the vesting period. With respect to restricted stock where vesting contains certain performance-based vesting conditions, the fair value is expensed based on the accelerated attribution method as prescribed by ASC 718, Stock Compensation, over the vesting period. With the exception of certain executives whose employment agreements provide for continued vesting in certain circumstances upon departure, if the employee who received the restricted stock leaves the Company prior to the vesting date for any reason, the shares of restricted stock will be forfeited and returned to the Company. During the three month period ended September 30, 2013, the Company did not grant any shares of restricted stock that contained performance-based vesting conditions. During the nine month period ended September 30, 2013, the Company granted 480,000 shares of nonvested restricted stock to certain executives that contain performance-based vesting conditions. Of these shares, 25% vest in 2014 if the performance criteria related to certain 2013 operating results are achieved and the executive is still employed as of the vesting date and the remaining 75% of the shares vest quarterly over a three year period thereafter as long as the executive is still employed as of the vesting date. If the performance criteria related to certain 2013 operating results are not achieved, 100% of the shares are forfeited.

Other than the items previously discussed above, during the three and nine month periods ended September 30, 2013, there were no changes to probabilities of vesting of performance-based stock awards which had a material impact on stock-based compensation expense or amounts expected to be recognized.

Additional Information about Restricted Stock

	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
	in thousands, except share and per
	share amounts
Total number of shares of restricted stock granted during the period		80,703		212,950		1,491,269		1,513,828
Weighted average fair value per share of restricted stock granted	$	13.53	$	10.72	$	16.47	$	7.87
Total number of shares of restricted stock vested during the period		138,282		50,174		833,521		244,513
Total fair value of shares of restricted stock vested during the period	$	2,024	$	423	$	13,359	$	2,103

Restricted Stock Units

The following table summarizes the Company’s restricted stock unit activity during the nine month period ended September 30, 2013:

	Number of Shares			Weighted Average Grant Date Fair Value Per Share
Nonvested at December 31, 2012		106,478		$	27.88
Granted		—			—
Vested		(56,603	)		27.01
Cancelled		(15,625	)		29.48
Nonvested at September 30, 2013		34,250		$	28.59

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Additional Information about Restricted Stock Units

	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
	in thousands, except share and per share amounts
Total number of shares of restricted stock vested during the period		—		6,728		56,603		85,312
Total fair value of shares of restricted stock vested during the period	$	—	$	61	$	948	$	792

9. Income Taxes

The Company accounts for income taxes in accordance with the liability method of ASC 740, Income Taxes (ASC 740). Deferred tax assets and liabilities are recognized based on the differences between the financial reporting and income tax bases of assets and liabilities using statutory rates. A valuation allowance must be provided against deferred tax assets if, based upon the available evidence, it is more likely than not that some or all of the deferred tax assets will not be realized.

ASC 740 also provides criteria for the recognition, measurement, presentation and disclosures of uncertain tax positions. A tax benefit from an uncertain tax position may be recognized if it is “more likely than not” that the position is sustainable based solely on its technical merits. During the three and nine month periods ended September 30, 2013, there were no material changes in the Company’s uncertain tax positions.

Each interim period is considered an integral part of the annual period and tax expense is measured using an estimated annual effective tax rate. An enterprise is required, at the end of each interim reporting period, to make its best estimate of the effective tax rate for the full fiscal year and use that rate to provide for income taxes on a current year-to-date basis. However, if an enterprise is unable to make a reliable estimate of its annual effective tax rate, the actual effective tax rate for the year-to-date period may be the best estimate of the annual effective tax rate. For the six months ended June 30, 2013, the Company had determined that it was able to reliably estimate the annual effective tax rate on its foreign earnings, but was unable to reliably estimate its annual effective tax rate on its U.S. earnings due to unusual sensitivity to the rate as it relates to its forecasted fiscal 2013 U.S. loss. As a result, the Company recorded a provision for income taxes during the six month period ended June 30, 2013 comprised of a tax benefit on its foreign loss plus a U.S. tax expense related to tax deductible goodwill that generates a deferred tax liability that cannot be used as a source of income against which deferred tax assets may be realized.

For the nine months ended September 30, 2013, the Company determined that it was able to reliably estimate its worldwide annual effective tax rate due to the resolution of certain matters that previously resulted in significant volatility in both the Company’s forecasted fiscal 2013 U.S. ordinary income and its U.S. effective tax rate, and applied this estimated worldwide annual effective tax rate to its year-to-date income. For the nine months ended September 30, 2013, the Company recorded a provision for income taxes of $5,828, which represents an approximate effective tax rate of 12%. During the three months ended September 30, 2013, due to limitations on the use of net operating losses in certain states, the Company utilized income tax deductions related to the exercise of stock options and vesting of shares of restricted stock and recorded a benefit of $999 directly to additional paid-in capital.

The Company expects to record a benefit from income taxes for the three month period ended December 31, 2013. For fiscal 2013, the Company expects to record a provision for income taxes of approximately $3,200 to $3,400 for the tax deductible goodwill, certain state income taxes and foreign taxes resulting from guaranteed profits, which will result in a benefit from income taxes during the three month period ending December 31, 2013.

The Company reviews all available evidence to evaluate the recovery of deferred tax assets, including the recent history of losses in all tax jurisdictions, as well as its ability to generate income in future periods. As of September 30, 2013, due to the uncertainty related to the ultimate use of the Company’s deferred income tax assets, the Company has provided a valuation allowance on all of its U.S., Australia and New Zealand deferred tax assets.

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10. Concentrations of Credit Risk

The following table presents the Company’s significant customers. PJM Interconnection (PJM) is an electric power grid operator customer in the mid-Atlantic region that is comprised of multiple utilities and was formed to control the operation of the regional power system, coordinate the supply of electricity, and establish fair and efficient markets. Independent Market Operator (IMO) is an entity that was established to administer and operate the Western Australia (WA) wholesale electricity market. The main objectives of the IMO are to coordinate the supply of electricity, encourage competition in the market, establish fair and efficient markets, and ensure economic supply of electricity to customers in WA. No other customer comprised more than 10% of consolidated revenues during the three or nine month periods ended September 30, 2013 and 2012, respectively.

	Three Months Ended September 30,
	2013					2012
	Revenues		% of Total Revenues			Revenues		% of Total Revenues
PJM	$	171,377		62	%	$	108,294		61	%
IMO	$	45,708		16	%	$	17,440		10	%

	Nine Months Ended September 30,
	2013					2012
	Revenues		% of Total Revenues			Revenues		% of Total Revenues
PJM	$	173,252		50	%	$	109,657		47	%
IMO	$	45,708		13	%	$	17,440		7	%

Southern California Edison Company, IMO and Pacific Gas and Electric were the only customers that each comprised 10% or more of the Company’s accounts receivable balance at September 30, 2013, representing 17%, 14%, and 13% respectively, of such accounts receivable balance. Southern California Edison Company, PJM and PPL Electric Utilities Corporation were the only customers that each comprised 10% or more of the Company’s accounts receivable balance at December 31, 2012, representing 14%, 12%, and 10%, respectively, of such accounts receivable balance.

Unbilled revenue related to PJM was $117,972 and $44,926 at September 30, 2013 and December 31, 2012, respectively. There was no significant unbilled revenue for any other customers at September 30, 2013 and December 31, 2012.

Deposits consist of funds to secure performance under certain contracts and open market bidding programs with electric power grid operator and utility customers. Deposits held by these customers were $224 and $1,888 at September 30, 2013 and December 31, 2012, respectively.

11. Legal Proceedings

The Company is subject to legal proceedings, claims and litigation arising in the ordinary course of business. In accordance with ASC 450, Contingencies, the Company accrues for losses that are determined to be both probable and estimable. As of September 30, 2013, the amounts accrued related to probable and estimable losses are not material and the Company does not expect the ultimate costs to resolve these matters to have a material adverse effect on its consolidated financial position, results of operations or cash flows. In addition to ordinary-course litigation, the Company is a party to the litigation described below.

On May 3, 2013, a purported shareholder of the Company filed a derivative and class action complaint in the United States District Court for the District of Delaware (the Court) against certain officers and directors of the Company as well as the Company as a nominal defendant. The complaint asserts derivative claims, purportedly brought on behalf of the Company, for breach of fiduciary duty, waste of corporate assets, and unjust enrichment in connection with certain equity grants (awarded in 2010, 2012, and 2013) that allegedly exceeded an annual limit on per-employee equity grants purported to be contained in the 2007 Plan. The complaint also asserts a direct claim, brought on behalf of the plaintiff and a proposed class of the Company’s shareholders, alleging the Company’s

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proxy statement filed on April 26, 2013 is false and misleading because it fails to disclose that the equity grants were improper. The plaintiff seeks, among other relief, rescission of the equity grants, unspecified damages, injunctive relief, disgorgement, attorneys’ fees, and such other relief as the Court may deem proper.

Company management believes that the Company and the other defendants have substantial legal and factual defenses to the claims and allegations contained in the complaint, and is pursuing these defenses vigorously. There can be no assurance, however, that such efforts will be successful, and an adverse resolution of the lawsuit could have a material effect on the Company’s financial condition, results of operations and cash flows. In addition to negatively impacting the Company’s sales and prospects, diverting financial and management resources and general business disruption, the Company may suffer from adverse publicity that could harm its reputation and negatively impact its stock price, regardless of whether the allegations are valid or whether the Company is ultimately liable. Although the Company carries insurance for these types of claims and currently believes that this claim would be covered by its insurance, there is no guarantee that this claim will be covered. A denial of the claim by the insurance provider or a judgment significantly in excess of the Company’s insurance coverage could materially and adversely affect its financial condition, results of operations and cash flows. The Company has determined that it is neither remote nor probable that the Company will incur a loss related to this matter. The Company is not presently able to reasonably estimate potential losses, if any, related to the lawsuit.

12. Recent Accounting Pronouncements

In July 2013, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2013-11, Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists (ASU 2013-11). The amendments in ASU 2013-11 require an entity to present an unrecognized tax benefit in the financial statements as a reduction to a deferred tax asset for an net operating loss (“NOL”) carryforward, a similar tax loss, or a tax credit carryforward except when: (1) An NOL carryforward, a similar tax loss, or a tax credit carryforward is not available as of the reporting date under the governing tax law to settle taxes that would result from the disallowance of the tax position; or (2) the entity does not intend to use the deferred tax asset for this purpose (provided that the tax law permits a choice). If either of these conditions exists, an entity should present an unrecognized tax benefit in the financial statements as a liability and should not net the unrecognized tax benefit with a deferred tax asset. The amendments in this ASU are effective for fiscal years, and interim periods within those years, beginning after December 15, 2013. The amendments should be applied prospectively to all unrecognized tax benefits that exist at the effective date. Retrospective application is permitted. The Company does not expect this ASU to have any impact on its consolidated financial statements.

In July 2013, the FASB issued ASU 2013-10, Inclusion of the Fed Funds Effective Swap Rate (or Overnight Index Swap Rate) as a Benchmark Interest Rate for Hedge Accounting Purposes (ASU 2013-10). The amendments in ASU 2013-10 permit an entity to designate Fed Funds Effective Swap Rate, also referred to as the overnight index swap rate, as a benchmark interest rate for hedge accounting purposes. In addition, the amendment removes the restriction on using different benchmark interest rates for similar hedges. The amendment is applicable to all entities that elect to apply hedge accounting of the benchmark interest rate under ASC815. The amendment is effective immediately. This amendment did not have any impact on the Company’s consolidated financial statements.

In February 2013, the FASB issued guidance for reporting of amounts reclassified out of accumulated other comprehensive income. The revised guidance requires reporting the effect of significant reclassifications out of accumulated other comprehensive income on the respective line items in net income if the amount being reclassified is required to be reclassified in its entirety to net income. For other amounts that are not required to be reclassified in their entirety to net income in the same reporting period, an entity is required to cross-reference other disclosures that provide additional detail about these amounts. The amendments do not change the current requirements for reporting net income or other comprehensive income in financial statements. The guidance was effective prospectively for reporting periods beginning after December 15, 2012. Early adoption was permitted. The adoption of this guidance did not have any impact on the Company’s consolidated financial statements.

In December 2011, the FASB issued ASU No. 2011-11, Balance Sheet (Topic 210): Disclosures about Offsetting Assets and Liabilities (ASU No. 2011-11). ASU No. 2011-11 requires an entity to disclose information about offsetting and related arrangements to enable users of its financial statements to understand the effect of those arrangements on its financial position. An entity is required to apply ASU No. 2011-11 for annual reporting periods beginning on or after January 1, 2013, and interim periods within those annual periods. An entity should provide the disclosures required by ASU No. 2011-11 retrospectively for all comparative periods presented. The adoption of ASU No. 2011-11 did not have any impact on the Company’s consolidated financial statements.

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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 our unaudited condensed consolidated financial statements and related notes thereto included elsewhere in this Quarterly Report on Form 10-Q, as well as our audited financial statements and notes thereto and Management’s Discussion and Analysis of Financial Condition and Results of Operations included in our Annual Report on Form 10-K for the fiscal year ended December 31, 2012, as filed with the Securities and Exchange Commission, or the SEC, on February 27, 2013, or our 2012 Form 10-K. This Quarterly Report on Form 10-Q contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, or the Securities Act, and Section 21E of the Securities Exchange Act of 1934, as amended, or the Exchange Act. Without limiting the foregoing, the words “may,” “will,” “should,” “could,” “expect,” “plan,” “intend,” “anticipate,” “believe,” “estimate,” “predict,” “potential,” “continue,” “target” and variations of those terms or the negatives of those terms and similar expressions are intended to identify forward-looking statements. All forward-looking statements included in this Quarterly Report on Form 10-Q are based on current expectations, estimates, forecasts and projections and the beliefs and assumptions of our management including, without limitation, our expectations regarding our results of operations, operating expenses and the sufficiency of our cash for future operations. We assume no obligation to revise or update any such forward-looking statements. Our actual results could differ materially from those anticipated in these forward-looking statements as a result of certain important factors, including those set forth below under this Item 2 — “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” Part II, Item 1A — “Risk Factors” and elsewhere in this Quarterly Report on Form 10-Q, as well as in our 2012 Form 10-K and Quarterly Reports on Form 10-Q for the periods ended March 31, 2013 and June 30, 2013, as filed with the SEC on May 6, 2013, and August 6, 2013, respectively, or our 2013 First and Second Quarter Form 10-Q’s. You should carefully review those factors and also carefully review the risks outlined in other documents that we file from time to time with the SEC.

Overview

We are a leading provider of energy intelligence software and related solutions. We unlock the full value of energy management for commercial, institutional and industrial end-users of energy, which we refer to as our C&I customers, and our electric power grid operator and utility customers by delivering a comprehensive suite of demand-side management services and solutions that reduce real-time demand for electricity, increase energy efficiency, improve energy supply transparency in competitive markets, and mitigate emissions.

We believe that we are the world’s leading provider of demand response applications and solutions. Demand response is an alternative to traditional power generation and transmission infrastructure projects that enables electric power grid operators and utilities to reduce the likelihood of service disruptions, such as brownouts and blackouts, during periods of peak electricity demand, and otherwise manage the electric power grid during short-term imbalances of supply and demand or during periods when energy prices are high.

In providing our demand response solutions, we match obligation, in the form of megawatts, or MW, that we agree to deliver to our utility and electric power grid operator customers, with supply, in the form of MW that we are able to curtail from the electric power grid through our arrangements with C&I customers. We increase our ability to curtail demand from the electric power grid by deploying a sales team to contract with our C&I customers and by installing our equipment at these customers’ sites to connect them to our network. When we are called upon by our utility or electric power grid operator customers to deliver MW, we use our Network Operations Center, or NOC, and our comprehensive demand response application, DemandSMART, to remotely manage and reduce electricity consumption across a growing network of C&I customer sites, making demand response capacity available to electric power grid operators and utilities on demand while helping C&I customers achieve energy savings, improved financial results and environmental benefits. We receive recurring payments from electric power grid operators and utilities for managing demand response capacity and we share these recurring payments with our C&I customers in exchange for those C&I customers reducing their power consumption when called upon by us to do so. We occasionally reallocate and realign our capacity supply and obligation through open market bidding programs, supplemental demand response programs, auctions or other similar capacity arrangements and bilateral contracts to account for changes in supply and demand forecasts, as well as changes in programs and market rules in order to achieve more favorable pricing opportunities. We refer to the above activities as managing our portfolio of demand response capacity.

We build on our position as a leading demand response solutions provider by using our NOC and energy management application platform to deliver a portfolio of additional energy management applications, solutions and products to new and existing C&I, electric power grid operator and utility customers. These additional energy management applications, solutions and products include our EfficiencySMART and SupplySMART applications and solutions, and certain wireless energy management products. EfficiencySMART is our data-driven energy efficiency suite that includes energy efficiency planning, audits, assessments,

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commissioning and retro-commissioning authority services, and a cloud-based energy analytics application used for managing energy across a C&I customer’s portfolio of sites. The cloud-based energy analytics application also includes the ability to integrate with a C&I customer’s existing energy management system, provide utility bill management and tools for measurement, tracking, analysis, reporting and management of greenhouse gas emissions. SupplySMART is our energy price and risk management application that provides our C&I customers located in restructured or deregulated markets throughout the United States with the ability to more effectively manage the energy supplier selection process, including energy supply product procurement and implementation, budget forecasting, and utility bill management. Our wireless energy management products are designed to ensure that our C&I customers can connect their equipment remotely and access meter data securely, and include both cellular modems and an agricultural specific wireless technology solution.

Since inception, our business has grown substantially. We began by providing demand response services in one state in 2003 and have expanded to providing our portfolio of energy management applications, services and products in several regions throughout the United States, as well as internationally in Australia, Canada, New Zealand and the United Kingdom.

Revenues and Expense Components

Revenues

We derive recurring revenues from the delivery of our energy management applications, solutions and products. We do not recognize any revenues until persuasive evidence of an arrangement exists, delivery has occurred, the fee is fixed or determinable, and we deem collection to be reasonably assured.

Our revenues from our demand response solutions primarily consist of capacity and energy payments, including ancillary services payments, and revenues derived from the effective management of our portfolio of demand response capacity, including our participation in capacity auctions and bilateral contracts. We derive revenues from demand response capacity that we make available in open market programs and pursuant to contracts that we enter into with electric power grid operators and utilities. In certain markets, we enter into contracts with electric power grid operators and utilities, generally ranging from three to ten years in duration, to deploy our demand response solutions. We refer to these contracts as utility contracts.

Where we operate in open market programs, our revenues from demand response capacity payments may vary from month-to-month based upon our enrolled capacity and the market payment rate. Where we have a utility contract, we receive periodic capacity payments, which may vary monthly or seasonally, based upon enrolled capacity and predetermined payment rates. Under both open market programs and utility contracts, we receive capacity payments regardless of whether we are called upon to reduce demand for electricity from the electric power grid; and we recognize revenue over the applicable delivery period, even when payments are made over a different period. We generally demonstrate our capacity either through a demand response event or a measurement and verification test. This demonstrated capacity is typically used to calculate the continuing periodic capacity payments to be made to us until the next demand response event or measurement and verification test establishes a new demonstrated capacity amount. In most cases, we also receive an additional payment for the amount of energy usage that we actually curtail from the grid during a demand response event. We refer to this as an energy payment.

As program rules may differ for each open market program in which we participate and for each utility contract, we assess whether or not we have met the specific service requirements under the program rules and recognize or defer revenues as necessary. We recognize demand response capacity revenues when we have provided verification to the electric power grid operator or utility of our ability to deliver the committed capacity under the open market program or utility contract. Committed capacity is verified through the results of an actual demand response event or a measurement and verification test. Under certain programs, once the capacity amount has been verified, the revenues are recognized and future revenues become fixed or determinable and are recognized monthly over the performance period until the next demand response event or measurement and verification test. In subsequent demand response events or measurement and verification tests, if our verified capacity is below the previously verified amount, the electric power grid operator or utility customer will reduce future payments based on the adjusted verified capacity amounts. Under certain utility contracts and open market program participation rules, our performance and related fees are measured and determined over a period of time. If we can reliably estimate our performance for the applicable performance period, we will reserve the entire amount of estimated penalties that will be incurred, if any, as a result of estimated underperformance prior to the commencement of revenue recognition. If we are unable to reliably estimate the performance and any related penalties, we defer the recognition of revenues until the fee is fixed or determinable. Any changes to our original estimates of net revenues are recognized as a change in accounting estimate in the earliest reporting period that such a change is determined.

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In the PJM Interconnection, or PJM, open market program in which we participate, the program year operates on a June to May basis and performance is measured based on the aggregate performance during the months of June through September. As a result, fees received for the month of June could potentially be subject to adjustment or refund based on performance during the months of July through September. Based on changes to certain PJM program rules during the year ended December 31, 2012, or fiscal 2012, we concluded that we no longer had the ability to reliably estimate the amount of fees potentially subject to adjustment or refund until the performance period ends on September 30^th of each year. Therefore, commencing in fiscal 2012, all demand response capacity revenues related to our participation in the PJM open market program are recognized at the end of the performance period, or during the three months ended September 30^th of each year. As a result of the fact that the period during which we are required to perform (June through September) is shorter than the period over which we receive payments under the program (June through May), a portion of the revenues that have been earned will be recorded and accrued as unbilled revenue. Revenues related to the current PJM open market program year were recognized during the three months ended September 30, 2013, and therefore we had $118.0 million in unbilled revenues from PJM at September 30, 2013.

Our revenues have historically been higher in the second and third quarters of our fiscal year due to seasonality related to the demand response market. We expect, based on the fact that we recognize demand response capacity revenue related to our participation in the PJM open market program and the Western Australia, or WA, demand response program governed by the Independent Market Organization (IMO), which we refer to as the WA demand response program, during the three months ended September 30^th of each year, that our revenues will typically be higher in the third quarter as compared to any other quarter in our fiscal year. However, the introduction in the PJM market of the summer-only, extended-summer and annual demand response products beginning in the 2014/2015 delivery year could adversely impact our ability to successfully manage our portfolio of demand response capacity in that program and could negatively impact our results of operations and financial condition.

Fees received from the reallocation or realignment of our capacity supply and obligation through auctions or other similar capacity arrangements and bilateral contracts are recognized as revenues as they become due and payable and are recorded as a component of DemandSMART revenues.

PJM revenues accounted for approximately 62% and 61% of our total revenues for the three month periods ended September 30, 2013 and 2012, respectively, and approximately 50% and 47% of our total revenues for the nine month periods ended September 30, 2013 and 2012, respectively. In addition, PJM revenues accounted for only 40% of our total revenues for fiscal 2012 as compared to 60% of our total revenues for fiscal 2010. We intend to continue to diversify our domestic demand response offerings outside of the PJM market, as well as expand our addressable market by pursuing additional demand response and energy management opportunities in both the United States and international markets. We anticipate the percentage of our total revenues derived from PJM for fiscal 2013 to be relatively consistent with fiscal 2012. WA revenues accounted for approximately 16% and 10% of our total revenues for the three month periods ended September 30, 2013 and 2012, respectively, and approximately 13% and 7% of our total revenues for the nine month periods ended September 30, 2013 and 2012, respectively. Other than PJM and WA, no individual electric power grid operator or utility customer accounted for more than 10% of our total revenues for the three and nine month periods ended September 30, 2013 and 2012. If we choose to participate in additional or different markets in the future, or we increase or decrease our participation in the markets in which we currently participate, the contribution of our current electric power grid operator and utility customers to total revenues may change.

Our EfficiencySMART and SupplySMART applications and solutions generally represent ongoing service arrangements where the revenues are recognized ratably over the service period commencing upon delivery of the contracted service to the customer. Under certain of our arrangements, in particular certain EfficiencySMART arrangements with our utility customers, a portion of the fees received may be subject to adjustment or refund based on the validation of the energy savings delivered after the implementation is complete. As a result, we defer the portion of the fees that are subject to adjustment or refund until such time as the right of adjustment or refund lapses, which is generally upon completion and validation of the implementation. In addition, under certain of our other arrangements, in particular those arrangements entered into by our wholly-owned subsidiary M2M Communications Corporation, or M2M, we sell proprietary equipment to C&I customers that is utilized to provide the ongoing services that we deliver. Currently, this equipment has been determined to not have stand-alone value. As a result, we defer the fees associated with the equipment and begin recognizing those fees ratably over the expected C&I customer relationship period, which is generally three years, once the C&I customer is receiving the ongoing services from us. In addition, we capitalize the associated direct and incremental costs, which primarily represent the equipment and third-party installation costs, and recognize such costs over the expected C&I customer relationship period.

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Cost of Revenues

Cost of revenues for our demand response services primarily consist of amounts owed to our C&I customers for their participation in our demand response network and are generally recognized over the same performance period as the corresponding revenue. We enter into contracts with our C&I customers under which we deliver recurring cash payments to them for the capacity they commit to make available on demand. We also generally make an energy payment when a C&I customer reduces consumption of energy from the electric power grid during a demand response event. The equipment and installation costs for our devices located at our C&I customer sites, which monitor energy usage, communicate with C&I customer sites and, in certain instances, remotely control energy usage to achieve committed capacity, are capitalized and depreciated over the lesser of the remaining estimated customer relationship period or the estimated useful life of the equipment, and this depreciation is reflected in cost of revenues. We also include in cost of revenues our amortization of acquired developed technology, amortization of capitalized internal-use software costs related to our DemandSMART application, the monthly telecommunications and data costs we incur as a result of being connected to C&I customer sites, and our internal payroll and related costs allocated to a C&I customer site. Certain costs, such as equipment depreciation and telecommunications and data costs, are fixed and do not vary based on revenues recognized. These fixed costs could impact our gross margin trends during interim periods as described elsewhere in this Quarterly Report on Form 10-Q. Cost of revenues for our EfficiencySMART and SupplySMART applications and solutions, and certain other wireless energy management products include our amortization of capitalized internal-use software costs related to those applications, solutions and products, third-party services, equipment costs, equipment depreciation, and the wages and associated benefits that we pay to our project managers for the performance of their services.

We defer incremental direct costs related to the acquisition or origination of a utility contract or open market program in a transaction that results in the deferral or delay of revenue recognition. As of September 30, 2013 and December 31, 2012, we had no deferred incremental direct costs related to the acquisition or origination of a utility contract or open market program and during the three and nine month periods ended September 30, 2013 and 2012, no contract origination costs were deferred. In addition, we defer incremental direct costs incurred related to customer contracts where the associated revenues have been deferred as long as the deferred incremental direct costs are deemed realizable. During the three month periods ended September 30, 2013 and 2012, we deferred $1.2 million and $0.7 million, respectively, of incremental direct costs associated with customer contracts. During the nine month periods ended September 30, 2013 and 2012, we deferred $18.4 million and $11.5 million, respectively, of incremental direct costs associated with customer contracts. These deferred expenses will be expensed in proportion to the related revenue being recognized. The increase in the deferral of incremental costs during the nine month period ended September 30, 2013 compared to the same period in 2012 was primarily related to the increase in deferred costs associated with our Western Australia and our PJM demand response programs, where the deferred costs were expensed when the associated revenues were recognized during the three month period ending September 30, 2013. During the three month periods ended September 30, 2013 and 2012, we expensed $23.1 million and $10.5 million, respectively, of deferred incremental direct costs to cost of revenues. During the nine month periods ended September 30, 2013 and 2012, we expensed $25.6 million and $11.8 million, respectively, of deferred incremental direct costs to cost of revenues. As of September 30, 2013, there were no material realizability issues related to deferred incremental direct costs. We also capitalize the costs of our production and generation equipment utilized in the delivery of our demand response services and expense these costs over the lesser of the estimated useful life of the equipment or the term of the contractual arrangement. During the three month periods ended September 30, 2013 and 2012, we capitalized $1.3 million and $0.9 million, respectively, of production and generation equipment costs. During the nine month periods ended September 30, 2013 and 2012, we capitalized $8.9 million and $6.1 million, respectively, of production and generation equipment costs. We believe that the above accounting treatments appropriately match expenses with the associated revenues.

Gross Profit and Gross Margin

Gross profit consists of our total revenues less our cost of revenues. Our gross profit has been, and will be, affected by many factors, including (a) the demand for our energy management applications, services and products, (b) the selling price of our energy management applications, solutions and products, (c) our cost of revenues, (d) the way in which we manage, or are permitted to manage by the relevant electric power grid operators or utilities, our portfolio of demand response capacity, (e) the introduction of new energy management applications, solutions and products, (f) our demand response event performance and (g) our ability to open and enter new markets and regions and expand deeper into markets we already serve. The effective management of our portfolio of demand response capacity, including the outcomes in negotiating favorable contracts with our customers and our participation in capacity auctions and bilateral contracts, and our demand response event performance, are the primary determinants of our gross profit and gross margin.

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Operating Expenses

Operating expenses consist of selling and marketing, general and administrative, and research and development expenses. Personnel-related costs are the most significant component of each of these expense categories. We grew from 660 full-time employees at September 30, 2012 to 738 full-time employees at September 30, 2013 primarily as a result of our overall growth and expansion into new markets over the past year. In addition, we incur significant up-front costs associated with the increase in the number of MW under contract, which we expect to continue for the foreseeable future. We expect our overall operating expenses to increase marginally in absolute dollar terms for the foreseeable future as we continue to enable new C&I customer sites and expand the development of our energy management applications, services and products. In addition, amortization expense from intangible assets acquired in possible future acquisitions could potentially increase our operating expenses in future periods. Although we expect an increase in operating expenses in absolute dollar terms through at least the end of fiscal 2015, we expect that operating expenses as a percentage of revenues will decrease as we continue to realize improvements in our operating leverage and overall cost management.

Selling and Marketing

Selling and marketing expenses consist primarily of (a) salaries and related personnel costs, including costs associated with share-based payment awards, related to our sales and marketing organization, (b) commissions, (c) travel and other out-of-pocket expenses, (d) marketing programs such as trade shows and (e) other related overhead. Commissions are recorded as an expense when earned by the employee. We expect an increase in selling and marketing expenses in absolute dollar terms through at least the end of fiscal 2015 as we continue the expansion of our selling and marketing activities into new markets and regions; however, we expect that selling and marketing expenses as a percentage of revenues will decrease for the foreseeable future.

General and Administrative

General and administrative expenses consist primarily of (a) salaries and related personnel costs, including costs associated with share-based payment awards and bonuses, related to our executive, finance, human resource, information technology and operations organizations, (b) facilities expenses, (c) accounting and legal professional fees, (d) depreciation and amortization and (e) other related overhead. We expect an increase in general and administrative expenses in absolute dollar terms through at least the end of fiscal 2015 as we invest in infrastructure to support our continued growth; however, we expect that general and administrative expenses as a percentage of revenues will decrease for the foreseeable future.

Research and Development

Research and development expenses consist primarily of (a) salaries and related personnel costs, including costs associated with share-based payment awards, related to our research and development organization, (b) payments to suppliers for design and consulting services, (c) costs relating to the design and development of new energy management applications, solutions and products and enhancement of existing energy management applications, solutions and products, (d) quality assurance and testing and (e) other related overhead. During the three and nine month periods ended September 30, 2013, we capitalized software development costs, including software license fees and external consulting costs, of $1.5 million and $5.8 million, respectively, which are included as software in property and equipment at September 30, 2013. During the three and nine month periods ended September 30, 2012, we capitalized software development costs of $1.2 million and $3.5 million, respectively, and the amount is included as software in property and equipment at September 30, 2012. We expect an increase in research and development expenses in absolute dollar terms through at least the end of fiscal 2015 as we develop new technologies and enhance our existing technologies; however, we expect that research and development expenses as a percentage of revenues will decrease for the foreseeable future.

Stock-Based Compensation

We account for stock-based compensation in accordance with Accounting Standards Codification 718, Stock Compensation. We recognize all share-based payments to employees, including grants of stock options, restricted stock and restricted stock units, in the statement of income based on their fair values as of the date of grant. During the three month period ended September 30, 2013, we did not grant any shares of non-vested restricted stock that contained performance-based vesting conditions. During the nine month period ended September 30, 2013, we granted 480,000 shares of non-vested restricted stock to certain executive employees. Of these shares, 25% vest in 2014 if the performance criteria related to certain 2013 operating results are achieved and the executive is still employed as of the vesting date and the remaining 75% of the shares vest quarterly over a three year period thereafter as long as the executive is still employed as of the vesting date. If the performance criteria related to certain 2013 operating results are not achieved, 100% of the shares are forfeited. During the nine month period ended September 30, 2013, we granted 1,491,269 shares of non-vested restricted stock at a weighted-average grant date fair value of $16.47 per share as compared to grants of 1,513,828 shares of non-vested restricted stock at a weighted average grant date fair value of $7.85 per share during the nine month period ended September 30, 2012. As a result of the increase in the grants of shares of non-vested restricted stock and the overall increase in our stock price, we anticipate that stock-based compensation expense on a per employee basis will increase for the foreseeable future.

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For the three month periods ended September 30, 2013 and 2012, we recorded expenses of approximately $3.8 million and $3.3 million, respectively, in connection with share-based payment awards made to employees and non-employees. For the nine month periods ended September 30, 2013 and 2012, we recorded expenses of approximately $11.8 million and $10.0 million, respectively, in connection with share-based payment awards made to employees and non-employees. With respect to stock option grants through September 30, 2013, a future expense of non-vested stock options of approximately $0.6 million is expected to be recognized over a weighted average period of 0.9 years. For outstanding non-vested restricted stock awards and restricted stock units subject to service-based vesting conditions as of September 30, 2013, we had $15.9 million of unrecognized stock-based compensation expense, which is expected to be recognized over a weighted average period of 3.0 years. For outstanding non-vested restricted stock awards subject to performance-based vesting conditions that were probable of vesting as of September 30, 2013, we had $5.5 million of unrecognized stock-based compensation expense, which is expected to be recognized over a weighted average period of 1.7 years. For non-vested restricted stock awards subject to outstanding performance-based vesting conditions that were not probable of vesting as of September 30, 2013, we had $0.1 million of unrecognized stock-based compensation expense. If and when any additional portion of our outstanding equity awards is deemed probable to vest or awards that are deemed probable to vest become not probable, we will reflect the effect of the change in estimate in the period of change by recording a cumulative catch-up adjustment to retroactively apply the new estimate. In June 2013, in connection with the departure of our former Executive Vice President, certain unvested share-based payments were forfeited. This individual forfeited 159,028 shares of restricted common stock and 12,500 restricted stock units. As a result, during the nine month period ended September 30, 2013, we reversed approximately $0.5 million of stock-based compensation expense that had been recognized in prior periods related to the portion of these unvested share-based payments that had been previously expected to vest. In August 2013, in connection with our Chief Accounting Officer providing notice of his resignation, certain unvested share-based payments that were previously deemed probable of vesting became improbable of vesting. As a result, during the three and nine month periods ended September 30, 2013, we reversed approximately $0.1 million of stock-based compensation expense that had been recognized in prior periods related to the portion of these unvested share-based payments that had been previously expected to vest.

Interest Expense and Other Income (Expense), Net

In March 2012, we entered into a $50.0 million credit facility with Silicon Valley Bank, or SVB, which was subsequently amended in June 2012 and April 2013, which we refer to as the 2012 credit facility. In April 2013, we entered into a $70.0 million senior secured revolving credit facility with the several lenders from time to time party thereto and SVB, as administrative agent, swingline lender, issuing lender, lead arranger and book manager, was subsequently amended in August 2013, which we refer to as the 2013 credit facility. The 2013 credit facility replaced the 2012 credit facility. Interest expense primarily consists of fees associated with the 2012 credit facility and the 2013 credit facility. Interest expense also consists of fees associated with issuing letters of credit and other financial assurances. Other income and expense consist primarily of gains or losses on transactions denominated in currencies other than our or our subsidiaries’ functional currency, interest income earned on cash balances, and other non-operating income and expense.

Consolidated Results of Operations

Three and Nine Month Periods Ended September 30, 2013 Compared to the Three and Nine Month Periods Ended September 30, 2012

Revenues

The following table summarizes our revenues for the three and nine month periods ended September 30, 2013 and 2012 (dollars in thousands):

	Three Months Ended September 30,				Dollar Change		Percentage Change
	2013		2012
Revenues:
DemandSMART	$	267,479	$	169,658	$	97,821		57.7	%
EfficiencySMART, SupplySMART, and Other		10,994		8,289		2,705		32.6	%
Total	$	278,473	$	177,947	$	100,526		56.5	%

	Nine Months Ended September 30,				Dollar Change		Percentage Change
	2013		2012
Revenues:
DemandSMART	$	318,553	$	213,586	$	104,967		49.1	%
EfficiencySMART, SupplySMART, and Other		28,923		22,084		6,839		31.0	%
Total	$	347,476	$	235,670	$	111,806		47.4	%

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For the three month period ended September 30, 2013, our DemandSMART revenues increased by $97.8 million, or 57.7%, as compared to the three month period ended September 30, 2012. For the nine month period ended September 30, 2013, our DemandSMART revenues increased by $105.0 million, or 49.1%, as compared to the nine month period ended September 30, 2012. The increase in our DemandSMART revenues was primarily attributable to changes in the following operating areas (dollars in thousands):

	Increase (Decrease)			Increase (Decrease)
	Three Months Ended September 30, 2012 to September 30, 2013			Nine Months Ended September 30, 2012 to September 30, 2013
PJM	$	63,083			63,595
Australia		27,723			28,131
PacifiCorp		4,987			4,987
Alberta, Canada		1,099			4,633
New Zealand		1,750			4,223
Pennsylvania Act 129 (Act 129)		(3,365	)		(4,486	)
ISO-NE		(382	)		(3,829	)
Other (1)		2,927			7,713
Total increased DemandSMART revenues	$	97,821			104,967

(1) The amounts included in this category relate to various demand response programs, none of which are individually material.

The increase in DemandSMART revenues during the three and nine month periods ended September 30, 2013 as compared to the same periods in 2012 was primarily due to an increase in pricing and enrolled MW in our PJM and WA demand response programs. In addition, the increase in revenues from the PJM demand response program was also due to the increase in energy revenues resulting from a significant increase in both the number of dispatches and number of MW dispatched as compared to 2012. The increase was also due to revenues recognized from our participation in other international demand response programs, including Alberta, Canada and New Zealand. We recognized no material revenues from our participation in either the Alberta, Canada or the New Zealand demand response programs during the three and nine months ended September 30, 2012. Additionally, this increase was also due to revenues recognized from our new demand response program with PacifiCorp in the northwestern region of the United States, for which revenues were recognized for the first time during the three month period ended September 30, 2013. The increase in DemandSMART revenues was partially offset by a decrease in revenues from the Act 129 programs, as these programs ended in the third quarter of 2012 and were not renewed for 2013. The increase in DemandSMART revenues was also partially offset by a decrease in our MW delivery obligation and less favorable pricing in the ISO-New England, Inc. (ISO-NE) market, and the termination of an ISO-NE program during the second quarter of 2012 from which we derived revenues for the three and nine month period ended September 30, 2012. As a result of the reduction in our MW delivery obligation in the ISO-NE market for the program year commencing June 1, 2013 through third party bilateral contracts and capacity auctions, we expect our ISO-NE revenues for the remainder of the year ending December 31, 2013, or fiscal 2013, to be lower than the comparative period in 2012.

For the three and nine month periods ended September 30, 2013, our EfficiencySMART, SupplySMART and other revenues increased by $2.7 million and $6.8 million, respectively, or 32.6% and 31.0%, as compared to the same periods in 2012 due to the recognition of revenues related to a $10 million EfficiencySMART data-driven energy management application for the Massachusetts Department of Energy Resources, under which all revenues were deferred as of September 30, 2012, an increase in our EfficiencySMART customers and an increase in EfficiencySMART and related consulting arrangements with utilities.

We currently expect our total DemandSMART revenues to increase during fiscal 2013 as compared to fiscal 2012 primarily due to an increase in pricing and enrolled MW in our PJM and WA demand response programs. We also currently expect our total EfficiencySMART, SupplySMART and other revenues to increase during fiscal 2013 as compared to fiscal 2012 primarily due to the expected, continued growth in customers and contracts, as well as the recognition of previously deferred revenues principally related to Massachusetts Department of Energy Resources EfficiencySMART arrangement.

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Gross Profit and Gross Margin

The following table summarizes our gross profit and gross margin percentages for the three and nine month periods ended September 30, 2013 and 2012 (dollars in thousands):

Three Months Ended September 30,
2013					2012
Gross Profit		Gross Margin			Gross Profit		Gross Margin
$	152,401		54.7	%	$	95,000		53.4	%

Nine Months Ended September 30,
2013					2012
Gross Profit		Gross Margin			Gross Profit		Gross Margin
$	175,334		50.5	%	$	109,233		46.3	%

The increase in gross profit during the three and nine month periods ended September 30, 2013 as compared to the same periods in 2012 was primarily due to an increase in revenues related to an increase in pricing and enrolled MW in our PJM and WA demand response programs, as well as the increase in PJM demand response energy revenues resulting from an increase in both the number of dispatches and number of MW dispatched. The increase in gross profit during the three and nine month periods ended September 30, 2013 as compared to the same periods in 2012 was also due to increase in revenues resulting from increased participation in our international demand response programs in Alberta, Canada and New Zealand. We had no material revenues in either Alberta, Canada or New Zealand, and therefore no significant gross profits were recognized during the three and nine month periods ended September 30, 2012 related to these programs. In addition, the increase in gross profit was due to the revenues and associated gross profits recognized from our new demand response program with PacifiCorp, for which revenues and gross profits were recognized for the first time during the three month period ended September 30, 2013. In addition, although revenues related to ISO-NE decreased for the three and nine month periods ended September 30, 2013 as compared to the same periods in 2012, our gross profits related to ISO-NE increased for the three and nine months ended September 30, 2013 due to a reduction of our MW delivery obligations in the ISO-NE market commencing on June 1, 2013, which resulted in a significant reduction of cost of revenues and favorable pricing arrangements under the third-party bilateral contracts and capacity auctions in which we participated. The increase in gross profit during the three and nine month periods ended September 30, 2013 as compared to the same periods in 2012 was also due to increased gross profits from EfficiencySMART, SupplySMART and other products and solutions that resulted from the increase in revenues, as well as a decrease in delivery costs. The increase in gross profit during the three and nine month periods ended September 30, 2013 as compared to the same periods in 2012 was partially offset by a decrease in revenues from the Act 129 programs, as these programs ended in the third quarter of 2012 and were not renewed for 2013. The increase in gross profit for the three and nine month periods ended September 30, 2013 as compared to the same periods in 2012 was also partially offset by the recognition of cost of revenues due to the uncertainty of future realizability of these costs, in a certain California demand response program where the associated revenues were deferred due to fees not being fixed or determinable.

Our gross margin increased during the three and nine month periods ended September 30, 2013, as compared to the same periods in 2012, due to the increase in revenues related to our participation in international demand response programs, which are higher margin demand response programs, improved management of our portfolio of demand response capacity in certain programs, primarily due to the reduction in our MW delivery obligation in the ISO-NE market for the program year commencing June 1, 2013 through third party bilateral contracts and capacity auctions, and lower installed costs associated with our C&I contracts. The increase in our gross margin during the three and nine month periods ended September 30, 2013 as compared to the same periods in 2012 was also attributable to higher gross margins from our EfficiencySMART, SupplySMART and other revenues, including the recognition of previously deferred revenues related to a $10 million EfficiencySMART data-driven energy management application for the Massachusetts Department of Energy Resources for which a portion of the costs had been expensed in prior periods. The increase in our gross margin for the three and nine month periods ended September 30, 2013 as compared to the same periods in 2012 was partially offset by a decrease in gross margin primarily related to changes in the management of our portfolio of demand response capacity in the PJM demand response program, including a decrease in the percentage of revenues recognized as a result of the adjustment of our zonal capacity obligations through our participation in PJM incremental auctions and an increase in the overall

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percentage of revenues paid to our C&I customers. For the three and nine month periods ended September 30, 2013, as compared to the same period in 2012, our increase in gross margin was also partially offset by the recognition of cost of revenues due to the uncertainty of future realizability of these costs, in a certain California demand response program where the associated revenues were deferred due to fees not being fixed or determinable.

We currently expect that our gross margin for the year ending December 31, 2013 will be slightly higher than our gross margin for the year ended December 31, 2012 due to the continuing improvement in the management of our portfolio of demand response capacity, as well as lower installed costs associated with our C&I contracts. We also expect that our gross margin for the three month period ended September 30, 2013 will be the highest gross margin among our four quarterly reporting periods in fiscal 2013 due to the seasonality of the demand response industry, which is consistent with our gross margin pattern in fiscal 2012 and prior years.

We currently expect our gross margins for the year ending December 31, 2014, or fiscal 2014, to return to more historic levels in the mid 40% range. This expected decrease in gross margin compared to fiscal 2013 is expected to result primarily from continued changes in fiscal 2014 in the management of our portfolio of demand response capacity in the PJM demand response program, including an expected decrease in the percentage of higher margin revenues recognized as a result of the adjustment of our zonal capacity obligations through our participation in the PJM incremental auctions and bilateral contracts. In addition, this expected decrease in gross margin in fiscal 2014 as compared to fiscal 2013 is expected to be due to an expected increase in lower margin energy revenues resulting from a potential increase in both the number of demand response event dispatches and number of MW expected to be dispatched in fiscal 2014 as compared to fiscal 2013 based on current trends.

Operating Expenses

The following table summarizes our operating expenses for the three and nine month periods ended September 30, 2013 and 2012 (dollars in thousands):

	Three Months Ended September 30,				Percentage Change
	2013		2012
Operating Expenses:
Selling and marketing	$	15,761	$	13,424		17.4	%
General and administrative		19,746		18,351		7.6	%
Research and development		4,535		3,914		15.9	%
Total	$	40,042	$	35,689		12.2	%

	Nine Months Ended September 30,				Percentage Change
	2013		2012
Operating Expenses:
Selling and marketing	$	50,444	$	41,342		22.0	%
General and administrative		60,872		52,880		15.1	%
Research and development		14,125		11,536		22.4	%
Total	$	125,441	$	105,758		18.6	%

In certain forward capacity markets in which we participate, such as PJM, we may install our equipment at a C&I customer site to allow for the curtailment of MW from the electric power grid, which we refer to as enablement, up to twelve months in advance of enrolling the C&I customer in a particular program. As a result, there has been a trend of incurring operating expenses at the time of enablement, including salaries and related personnel costs, associated with enabling certain of our C&I customers in advance of recognizing the corresponding revenues.

Selling and Marketing Expenses

The following table summarizes our selling and marketing expenses for the three and nine month periods ended September 30, 2013 and 2012 (dollars in thousands):

	Three Months Ended September 30,				Percentage Change
	2013		2012
Payroll and related costs	$	9,348	$	8,513		9.8	%
Stock-based compensation		1,426		1,182		20.6	%
Other		4,987		3,729		33.7	%
Total	$	15,761	$	13,424		17.4	%

	Nine Months Ended September 30,				Percentage Change
	2013		2012
Payroll and related costs	$	30,947	$	26,639		16.2	%
Stock-based compensation		4,272		3,428		24.6	%
Other		15,225		11,275		35.0	%
Total	$	50,444	$	41,342		22.0	%

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The increase in payroll and other employee related costs for the three and nine month periods ended September 30, 2013 compared to the same periods in 2012 was primarily due to the increase in the number of selling and marketing full-time employees from 207 at September 30, 2012 to 240 at September 30, 2013, as well as higher average expected bonuses on a per employee basis. The increase in payroll and other employee related costs for the three month period ended September 30, 2013 was substantially offset by a decrease in commissions primarily driven by lower commission rates.

The increase in stock-based compensation for the three and nine month periods ended September 30, 2013 compared to the same periods in 2012 was primarily due to the grant of additional stock-based awards, as well as an increase in the grant date fair value of stock-based awards granted during the nine month period ended September 30, 2013 as a result of the increase in our stock price as compared to the same period in 2012.

The increase in other selling and marketing expenses for the three and nine month periods ended September 30, 2013 compared to the same periods in 2012 was attributable to an increase of $0.5 million and $2.0 million, respectively, in the allocation of company-wide overhead costs, based on headcount, that resulted from the increase in the number of full-time selling and marketing employees. This increase for the three and nine month periods ended September 30, 2013 as compared to the same periods in 2012 was also due to higher costs associated with various marketing initiatives of $0.6 million and $1.2 million, respectively, and higher professional fees and related costs of $0.1 million and $0.3 million, respectively.

General and Administrative Expenses

The following table summarizes our general and administrative expenses for the three and nine month periods ended September 30, 2013 and 2012 (dollars in thousands):

	Three Months Ended September 30,				Percentage Change
	2013		2012
Payroll and related costs	$	11,525	$	9,622		19.8	%
Stock-based compensation		2,049		1,908		7.4	%
Other		6,172		6,821		–9.5	%
Total	$	19,746	$	18,351		7.6	%

	Nine Months Ended September 30,				Percentage Change
	2013		2012
Payroll and related costs	$	34,513	$	27,640		24.9	%
Stock-based compensation		6,521		5,712		14.2	%
Other		19,838		19,528		1.6	%
Total	$	60,872	$	52,880		15.1	%

The increase in payroll and related costs for the three and nine month periods ended September 30, 2013 compared to the same periods in 2012 was primarily attributable to an increase in the number of general and administrative full-time employees from 367 at September 30, 2012 to 397 at September 30, 2013, as well as an increase in overall salary rates and expected bonuses on a per employee basis.

The increase in stock-based compensation expense for the three and nine month periods ended September 30, 2013 compared to the same periods in 2012 was primarily due to an increase in the number of stock-based awards granted during the period and an increase in the overall grant-date fair value of stock-based awards granted as a result of the increase in our stock price. The increase in

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stock-based compensation for the nine month period ended September 30, 2013 compared to the same period in 2012 was also due to an increase in the number of stock-based awards granted to new executive officers and new members of our board of directors during the period, as well as fully-vested awards that were granted to existing members of our board of directors during the first quarter of 2013. These increases for both the three and nine month periods ended September 30, 2013 were partially offset by the reversal of stock-based compensation expense associated with the resignations of certain executive officers.

The decrease in other general and administrative expenses for the three month period ended September 30, 2013 compared to the same period in 2012 was attributable to the termination of the lease for our former principal executive offices in June 2013 and the corresponding decrease in rent expense of $0.5 million. For the three month period ended September 30, 2013 we only recognized rent expense related to our new principal executive offices. The decrease was also due to $0.8 million of a decrease in the allocation of company-wide overhead costs due to a decline in the percentage of general and administrative employees relative to total employees during the three month period ended September 30, 2013 as compared to the same period in 2012, and lower professional fees of $0.5 million. These decreases were partially offset by an increase in software license fees and insurance of $1.0 million and higher depreciation of $0.5 million.

The increase in other general and administrative expenses for the nine month period ended September 30, 2013 compared to the same period in 2012 was attributable to higher rent and depreciation expenses of approximately $2.7 million related to our new principal executive offices. The increase was also due to higher software license fees and insurance and higher information technology costs of $1.7 million and $0.5 million, respectively. These increases were offset by a $3.0 million decrease in the allocation of company-wide overhead costs due to a decline in the percentage of general and administrative employees relative to total employees during the nine month period ended September 30, 2013 as compared to the same period in 2012, a $0.1 million decrease in professional fees, as well as a $1.1 million early lease termination charge recorded during the nine month period ended September 30, 2013.

Research and Development Expenses

The following table summarizes our research and development expenses for the three and nine month periods ended September 30, 2013 and 2012 (dollars in thousands):

	Three Months Ended September 30,				Percentage Change
	2013		2012
Payroll and related costs	$	2,590	$	2,077		24.7	%
Stock-based compensation		346		251		37.8	%
Other		1,599		1,586		0.8	%
Total	$	4,535	$	3,914		15.9	%

	Nine Months Ended September 30,				Percentage Change
	2013		2012
Payroll and related costs	$	7,664	$	6,490		18.1	%
Stock-based compensation		1,039		878		18.3	%
Other		5,422		4,168		30.1	%
Total	$	14,125	$	11,536		22.4	%

The increase in payroll and other employee related costs for the three and nine month periods ended September 30, 2013 compared to the same periods in 2012 was primarily driven by an increase in the number of research and development full-time employees from 86 at September 30, 2012 to 101 at September 30, 2013, as well as an increase in salary rates per full-time employee. This increase for the three and nine month periods ended September 30, 2013 compared to the same periods in 2012 was partially offset by an increase in capitalized application development costs primarily related to our continued investment in our energy management applications.

The increase in stock-based compensation expense for the three and nine month periods ended September 30, 2013 as compared to the same periods in 2012 was primarily attributable to an increase in the number of stock-based awards granted and an increase in the overall grant-date fair value of the stock-based awards granted as a result of the increase in our stock price. This increase was

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partially offset by a decrease in the percentage of stock-based compensation expense related to our stock-based awards granted during fiscal 2011 and fiscal 2012 with performance-based vesting conditions that are recognized under the accelerated attribution method and which results in a greater percentage of stock-based compensation expense being recognized in fiscal 2011 and fiscal 2012 as compared to fiscal 2013.

The increase in other research and development expenses for the three month period ended September 30, 2013 compared to the same period in 2012 was primarily due to an increase of $0.2 million in the allocation of company-wide overhead costs which were primarily offset by lower technology and communication costs.

The increase in other research and development expenses for the nine month period ended September 30, 2013 compared to the same period in 2012 was primarily due to an increase of $0.8 million in the allocation of company-wide overhead costs based on headcount, higher consulting and professional fees of $0.4 million, and an increase of $0.2 million in data storage and software licenses and fees used in the development of our energy management applications, solutions and products.

Interest Expense and Other Income (Expense), Net

The increase in interest expense of approximately $0.2 million for the three month period ended September 30, 2013 compared to the same period in 2012 was primarily attributable to higher amortization expense of our deferred financing costs and higher average outstanding letter of credit balances during the three month period ended September 30, 2013 as compared to the same period in 2012. Interest expense for the nine month period ended September 30, 2013 was relatively unchanged from the nine month period ended September 30, 2012.

Other income, net for the three month period ended September 30, 2013 was $0.2 million compared to $0.6 million for the three month period ended September 30, 2012. Other income (expense), net for the nine month period ended September 30, 2013 was ($0.9) million compared to $1.3 million for the nine month period ended September 30, 2012. Other income (expense), net was comprised primarily of net foreign currency gains (losses) due to fluctuations in the Australian dollar and a nominal amount of other income. We had approximately $16.6 million at September 30, 2013 exchange rates ($17.8 million Australian) in intercompany receivables denominated in Australian dollars related to the acquisition of Energy Response Holdings Pty Ltd., or Energy Response, in July 2011 and royalties due to the U.S. parent for services and technology provided by the U.S. parent. During the three month period ended September 30, 2013, we incurred no material realized foreign currency gains (losses). We currently do not hedge any of our foreign currency transactions.

Income Taxes

The tax provision recorded for the three and nine month periods ended September 30, 2013 was $5.3 million and $5.8 million, respectively, and was comprised of a U.S. tax expense related to tax deductible goodwill that generates a deferred tax liability that cannot be used as a source of income against which deferred tax assets may be realized, certain state income taxes and foreign taxes resulting from guaranteed profits.

Each interim period is considered an integral part of the annual period and tax expense is measured using an estimated annual effective tax rate. An enterprise is required, at the end of each interim reporting period, to make its best estimate of the effective tax rate for the full fiscal year and use that rate to provide for income taxes on a current year-to-date basis. However, if an enterprise is unable to make a reliable estimate of its annual effective tax rate, the actual effective tax rate for the year-to-date period may be the best estimate of the annual effective tax rate. During the three month period ended September 30, 2013, the Company determined that it was able to reliably estimate its worldwide annual effective tax rate due to the resolution of certain matters that previously resulted in significant volatility in both the Company’s forecasted fiscal 2013 U.S. ordinary income and its U.S. effective tax rate, and applied this estimated worldwide annual effective tax rate to its consolidated pre-tax income for the nine month period ended September 30, 2013.

We review all available evidence to evaluate the recovery of deferred tax assets, including the recent history of losses in all tax jurisdictions, as well as our ability to generate income in future periods. As of September 30, 2013, due to the uncertainty related to the ultimate use of our deferred income tax assets, we have provided a valuation allowance on all of our U.S., Australian, and New Zealand deferred tax assets.

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Liquidity and Capital Resources

Overview

We have generated significant cumulative losses since inception. As of September 30, 2013, we had an accumulated deficit of $61.5 million. As of September 30, 2013, our principal sources of liquidity were cash and cash equivalents totaling $111.2 million, a decrease of $3.8 million from our December 31, 2012 balance of $115.0 million, and amounts available under the 2013 credit facility.

We believe our existing cash and cash equivalents at September 30, 2013, amounts available under the 2013 credit facility and our anticipated net cash flows from operating activities will be sufficient to meet our anticipated cash needs, including investing activities, for at least the next 12 months. Our future working capital requirements will depend on many factors, including, without limitation, the rate at which we sell our energy management applications, solutions and products to customers and the increasing rate at which letters of credit or security deposits are required by electric power grid operators and utilities, the introduction and market acceptance of new energy management applications, services and products, the expansion of our sales and marketing and research and development activities, and the geographic expansion of our business operations. To the extent that our cash and cash equivalents, amounts available under the 2013 credit facility and our anticipated cash flows from operating activities are insufficient to fund our future activities or planned future acquisitions, we may be required to raise additional funds through bank credit arrangements or public or private equity or debt financings. We also may raise additional funds in the event we determine in the future to effect one or more acquisitions of businesses, technologies or products. In addition, we may elect to raise additional funds even before we need them if the conditions for raising capital are favorable. Any equity or equity-linked financing could be dilutive to existing stockholders. In the event we require additional cash resources we may not be able to obtain bank credit arrangements or complete any equity or debt financing on terms acceptable to us or at all.

Cash Flows

The following table summarizes our cash flows for the nine months ended September 30, 2013 and 2012 (dollars in thousands):

	Nine Months Ended September 30,
	2013			2012
Cash flows provided by operating activities	$	33,459		$	12,866
Cash flows used in investing activities		(33,803	)		(7,147	)
Cash flows (used in) provided by financing activities		(2,632	)		141
Effects of exchange rate changes on cash		(835	)		11
Net change in cash and cash equivalents	$	(3,811	)	$	5,871

Cash Flows Provided by Operating Activities

Cash provided by operating activities primarily consists of net income adjusted for certain non-cash items including depreciation and amortization, stock-based compensation expenses, and the effect of changes in working capital and other activities.

Cash provided by operating activities for the nine months ended September 30, 2013 was $33.5 million and consisted of net income of $42.0 million and $36.6 million of non-cash items, offset by $45.1 million of net cash used in working capital and other activities. The noncash items consisted primarily of depreciation and amortization, stock-based compensation charges, impairment charges of property and equipment, unrealized foreign exchange transaction losses due to the strengthening of the U.S. dollar and deferred taxes. Cash used in working capital and other activities consisted of an increase of $26.6 million in accounts receivable due to the timing of cash receipts under the demand response programs in which we participate, an increase of $73.3 million in unbilled revenues, most of which related to the PJM demand response market, an increase of $2.9 million in prepaid expenses and other assets, a decrease of $6.7 million in deferred revenue and a decrease in accrued payroll and related expenses of $1.1 million. These amounts were offset by cash provided by working capital and other activities consisting of a decrease in capitalized incremental direct customer contract costs of $8.4 million, an increase of $6.9 million in other noncurrent liabilities primarily due to deferred rent associated with our new corporate headquarters, an increase in accrued capacity payments of $47.9 million and an increase in accounts payable, accrued performance adjustments and accrued expenses of $2.3 million.

Cash provided by operating activities for the nine months ended September 30, 2012 was $12.9 million and consisted of net income of $3.5 million and $29.1 million of noncash items, primarily consisting of depreciation and amortization, stock-based compensation charges, impairment charges of property and equipment, unrealized foreign exchange transaction gains, and non-cash interest expense, offset by $19.7 million of net cash used in working capital and other activities. Cash used in working capital and

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other activities consisted of an increase of $29.8 million in accounts receivable due to the timing of cash receipts under the demand response programs in which we participate, an increase of $11.6 million in unbilled revenues relating to the PJM demand response market, a decrease of $3.3 million in accounts payable, accrued performance adjustments and accrued expenses primarily due to the repayment of certain accrued performance adjustments, an increase in capitalized incremental direct customer contract costs of $1.2 million, and a decrease of $0.4 million in accrued payroll and related expenses. These amounts were offset by cash provided by working capital and other activities consisting of an increase of $13.1 million in deferred revenue, an increase in accrued capacity payments of $11.1 million, the majority of which was related to the PJM demand response market, an increase in other noncurrent liabilities of $0.6 million, and a decrease in prepaid expenses and other assets of $1.6 million.

Cash Flows Used in Investing Activities

Cash used in investing activities was $33.8 million for the nine month period ended September 30, 2013 and consisted of $32.9 million in capital expenditures primarily related to our new corporate headquarters, purchases of demand response equipment, as well as capitalized internal use software costs as we continue our investment to further develop and enhance our applications. We also made a payment of $0.7 million to acquire a customer contract. In addition, during the nine month period ended September 30, 2013, our restricted cash and deposits increased by $0.2 million primarily due to an increase in restricted cash utilized to collateralize performance obligations under certain demand response arrangements.

Cash used in investing activities was $7.1 million for the nine month period ended September 30, 2012. During the nine month period ended September 30, 2012, we incurred $11.8 million in capital expenditures primarily related to the purchase of office equipment, capitalized internal use software costs and demand response equipment and other miscellaneous capital expenditures. In addition, during the nine month period ended September 30, 2012, our restricted cash and deposits decreased by $4.7 million due to a decrease in deposits principally related to the financial assurance requirements for demand response programs in which we participate, as these deposits were replaced with letters of credit.

Cash Flows (Used in) Provided by Financing Activities

Cash used in financing activities was $2.6 million for the nine month period ended September 30, 2013 and consisted primarily of payments made totaling $5.0 million to repurchase shares of our common stock on the open market, partially offset by proceeds of $1.4 million that we received from exercises of options to purchase shares of our common stock. For the nine month period ended September 30, 2012, cash provided by financing activities consisted of proceeds that we received from exercises of options to purchase shares of our common stock.

Credit Facility Borrowings

In March 2012, we and one of our subsidiaries entered into the 2012 credit facility. On April 18, 2013, we and one of our subsidiaries and SVB terminated the 2012 credit facility, and we entered into the 2013 credit facility, which replaced the 2012 credit facility. The 2013 credit facility provides for a two year revolving line of credit in the aggregate amount of $70.0 million, subject to increase from time to time up to an aggregate amount of $100.0 million with an additional commitment from the lenders or new commitments from new financial institutions. The material changes in the 2013 credit facility’s monthly and quarterly financial covenants as compared to the financial covenants contained in the 2012 credit facility include:

• a change in our quarterly financial covenant, previously based on specified minimum earnings levels, to one based on specified free cash flow levels. The specified minimum free cash flow financial covenant is based on earnings before depreciation and amortization expense, interest expense and income, provision for income taxes, stock-based compensation expense, certain impairment charges and certain other non-cash charges or unusual gains over a trailing twelve month period less the sum of capital expenditures, cash paid for interest expense and cash paid for income taxes over the same trailing twelve month period;

• a change to our monthly financial covenant related to maintenance of a minimum specified ratio of current assets to current liabilities, increasing our required minimum of unrestricted cash from $30.0 million to $45.0 million for certain periods; and

• inclusion of a borrowing base covenant that limits the amount of borrowings, including letters of credit, under the 2013 credit facility based on a specified calculation. This borrowing base covenant is effective through the required filing date of our September 30, 2013 unaudited condensed consolidated financial statements with the SEC on Form 10-Q, as well as for any period in which our unrestricted cash falls below $70.0 million.

Subject to continued compliance with the covenants contained in the 2013 credit facility, the full amount of the 2013 credit facility may be available for issuances of letters of credit and up to $5.0 million may be available for swing line loans. The interest on

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revolving loans under the 2013 credit facility will accrue, at our election, at either (i) the Eurodollar Rate with respect to the relevant interest period plus 2.00% per annum or (ii) the ABR (defined as the highest of (x) the “prime rate” as quoted in the Wall Street Journal, and (y) the Federal Funds Effective Rate plus 0.50%) plus 1.00% per annum. The letter of credit fee charged under the 2013 credit facility is consistent with the 2012 credit facility letter of credit fee of 2.00%. We expense the interest and letter of credit fees under the 2013 credit facility, as applicable, in the period incurred. The obligations under the 2013 credit facility are secured by all of our domestic assets and several of our domestic subsidiaries. The 2013 credit facility terminates on April 18, 2015 and all amounts outstanding thereunder will become due and payable in full and we would be required to collateralize with cash any outstanding letter of credit under the 2013 credit facility up to 105% of the amounts outstanding. We incurred financing costs of $0.1 million in connection with the 2012 credit facility, which were deferred and were amortized to interest expense over the term of the 2012 credit facility, or through April 15, 2013. In connection with the 2013 credit facility, we incurred financing costs of approximately $0.5 million which have been deferred and are being amortized to interest expense over the term of the 2013 credit facility, or through April 18, 2015.

The 2013 credit facility contains customary terms and conditions for credit facilities of this type, including, among other things, restrictions on our and our subsidiaries’ ability to incur additional indebtedness, create liens, enter into transactions with affiliates, transfer assets, make certain acquisitions, pay dividends or make distributions on, or repurchase, our common stock, consolidate or merge with other entities, or undergo a change in control. In addition and as described above, we are required to meet certain monthly and quarterly financial covenants customary for this type of credit facility, including maintaining minimum specified level of free cash flow, a minimum specified unrestricted cash balance and a minimum specified ratio of current assets to current liabilities.

The 2013 credit facility contains customary events of default, including payment defaults, breaches of representations, breaches of affirmative or negative covenants, cross defaults to other material indebtedness, bankruptcy and failure to discharge certain judgments. If a default occurs and is not cured within any applicable cure period or is not waived, SVB may accelerate our obligations under the 2013 credit facility. If we are determined to be in default then any amounts outstanding under the 2013 credit facility would become immediately due and payable and we would be required to collateralize with cash any outstanding letters of credit up to 105% of the amounts outstanding.

In May 2013, we were required to provide financial assurance in connection with our capacity bid in a certain open market bidding program. We provided this financial assurance utilizing a $22.7 million letter of credit issued under the 2013 credit facility and a portion of its available unrestricted cash on hand. During the three month period ended June 30, 2013, based on the capacity that we cleared in the above open market bidding program and the required post-auction financial assurance requirements, we recovered all of our available cash that we had provided as financial assurance prior to the auction and $6.2 million of the letter of credit was cancelled. In July 2013, $10.0 million of outstanding letters of credit were cancelled as a result of the reduction of post-auction financial assurance requirements related to capacity that we cleared in an open market bidding program.

On August 2, 2013, we entered into an amendment to the 2013 credit facility. This amendment provided for an increase to the maximum dollar amount of shares of common stock that we may repurchase or redeem from our public stockholders without the consent of SVB and the other lenders party to the 2013 credit facility.

As of September 30, 2013, we were in compliance with all of our covenants under the 2013 credit facility. We believe that it is reasonably assured that we will comply with the covenants of the 2013 credit facility for the foreseeable future.

As of September 30, 2013, we had no borrowings, but had outstanding letters of credit totaling $49.9 million, under the 2013 credit facility. The increase in the amount of outstanding letters of credit from December 31, 2012 to September 30, 2013 is primarily as a result of additional letters of credit issued as collateral for new demand response arrangements and obligations. As of September 30, 2013, we had $20.1 million available under the 2013 credit facility for future borrowings or issuances of additional letters of credit.

Share Repurchase Program

On August 6, 2013, our Board of Directors authorized the repurchase of up to $30.0 million of our common stock during the period from August 6, 2013 through August 6, 2014, unless earlier terminated by the Board of Directors. During the three month period ended September 30, 2013, we repurchased 330,843 shares of our common stock with a weighted-average purchase price of $15.11 per share for a total cost of approximately $5.0 million. All shares were retired upon repurchase.

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Capital Spending

We have made capital expenditures primarily for general corporate purposes to support our growth, for equipment installations related to our business and for the build out of the lease for our new principal executive offices, which we occupied during the second quarter of fiscal 2013. Our capital expenditures totaled $32.9 million and $11.8 million during the nine month periods ended September 30, 2013 and 2012, respectively. Even after the exclusion of capital expenditures related to our new principal executive offices, we expect our capital expenditures for fiscal 2013 to increase slightly as compared to fiscal 2012 due to our continued growth.

Contractual Obligations

As of September 30, 2013, the contractual obligations disclosure contained in our 2012 Form 10-K has not materially changed.

Off-Balance Sheet Arrangements

As of September 30, 2013, we did not have any off-balance sheet arrangements, as defined in Item 303(a)(4)(ii) of Regulation S-K, that have or are reasonably likely to have a current or future effect on our financial condition, changes in our financial condition, revenues or expenses, results of operations, liquidity, capital expenditures or capital resources that is material to investors. We have issued letters of credit in the ordinary course of our business in order to participate in certain demand response programs. As of September 30, 2013, we had outstanding letters of credit totaling $49.9 million under the 2013 credit facility. For information on these commitments and contingent obligations, see “Liquidity and Capital Resources – Credit Facility Borrowings” above and Note 7 to our unaudited condensed consolidated financial statements contained herein.

Critical Accounting Policies and Use of Estimates

The discussion and analysis of our financial condition and results of operations are based upon our interim unaudited condensed consolidated financial statements, which have been prepared in accordance with GAAP. The preparation of these consolidated financial statements requires us to make estimates and judgments that affect the reported amounts of assets, liabilities, revenues and expenses, and related disclosure of contingent assets and liabilities. On an on-going basis, we evaluate our estimates, including those related to revenue recognition for multiple element arrangements, allowance for doubtful accounts, valuations and purchase price allocations related to business combinations, expected future cash flows including growth rates, discount rates, terminal values and other assumptions and estimates used to evaluate the recoverability of long-lived assets and goodwill, estimated fair values of intangible assets and goodwill, amortization methods and periods, certain accrued expenses and other related charges, stock-based compensation, contingent liabilities, tax reserves and recoverability of our net deferred tax assets and related valuation allowance. We base our estimates on historical experience and various other assumptions that are believed to be reasonable under the circumstances. Actual results could differ from these estimates if past experience or other assumptions do not turn out to be substantially accurate. Any differences may have a material impact on our financial condition and results of operations.

The critical accounting estimates used in the preparation of our financial statements that we believe affect our more significant judgments and estimates used in the preparation of our interim unaudited condensed consolidated financial statements presented in this Quarterly Report on Form 10-Q are described in “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and in the notes to the consolidated financial statements included in our 2012 Form 10-K. There have been no material changes to our critical accounting policies or estimates during the three and nine month periods ended September 30, 2013.

Recent Accounting Pronouncements

In July 2013, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2013-11, Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists (ASU 2013-11). The amendments in ASU 2013-11 require an entity to present an unrecognized tax benefit in the financial statements as a reduction to a deferred tax asset for an net operating loss (“NOL”) carryforward, a similar tax loss, or a tax credit carryforward except when: (1) An NOL carryforward, a similar tax loss, or a tax credit carryforward is not available as of the reporting date under the governing tax law to settle taxes that would result from the disallowance of the tax position; or (2) the entity does not intend to use the deferred tax asset for this purpose (provided that the tax law permits a choice). If either of these conditions exist, an entity should present an unrecognized tax benefit in the financial statements as a liability and should not net the unrecognized tax benefit with a deferred tax asset. The amendments in this ASU are effective for fiscal years, and interim periods within those years, beginning after December 15, 2013. The amendments should be applied prospectively to all unrecognized tax benefits that exist at the effective date. Retrospective application is permitted. We do not expect this ASU to have any impact on our consolidated financial statements.

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In July 2013, the FASB issued ASU 2013-10, Inclusion of the Fed Funds Effective Swap Rate (or Overnight Index Swap Rate) as a Benchmark Interest Rate for Hedge Accounting Purposes (ASU 2013-10). The amendments in ASU 2013-10 permit an entity to designate Fed Funds Effective Swap Rate, also referred to as the overnight index swap rate, as a benchmark interest rate for hedge accounting purposes. In addition, the amendment removes the restriction on using different benchmark interest rates for similar hedges. The amendment is applicable to all entities that elect to apply hedge accounting of the benchmark interest rate under ASC815. The amendment is effective immediately. This amendment did not have any impact on our consolidated financial statements.

In February 2013, the FASB issued the guidance for reporting of amounts reclassified out of accumulated other comprehensive income. The revised guidance requires reporting the effect of significant reclassifications out of accumulated other comprehensive income on the respective line items in net income if the amount being reclassified is required to be reclassified in its entirety to net income. For other amounts that are not required to be reclassified in their entirety to net income in the same reporting period, an entity is required to cross-reference other disclosures that provide additional detail about these amounts. The guidance did not change the current requirements for reporting net income or other comprehensive income in financial statements. The guidance was effective prospectively for reporting periods beginning after December 15, 2012. Early adoption was permitted. The adoption of this guidance did not have any impact on our consolidated financial statements.

In December 2011, the FASB issued ASU No. 2011-11, “Balance Sheet (Topic 210): Disclosures about Offsetting Assets and Liabilities,” or ASU 2011-11. ASU 2011-11 requires an entity to disclose information about offsetting and related arrangements to enable users of its financial statements to understand the effect of those arrangements on its financial position. An entity is required to apply ASU 2011-11 for annual reporting periods beginning on or after January 1, 2013, and interim periods within those annual periods. An entity should provide the disclosures required by ASU 2011-11 retrospectively for all comparative periods presented. The adoption of ASU 2011-11 did not have any impact on our consolidated financial statements.

Additional Information

Non-GAAP Financial Measures

To supplement our consolidated financial statements presented on a GAAP basis, we disclose certain non-GAAP measures that exclude certain amounts, including non-GAAP net income, non-GAAP net income per share, adjusted EBITDA and free cash flow. These non-GAAP measures are not in accordance with, or an alternative for, generally accepted accounting principles in the United States.

The GAAP measure most comparable to non-GAAP net income is GAAP net income; the GAAP measure most comparable to non-GAAP net income per share is GAAP net income per share; the GAAP measure most comparable to adjusted EBITDA is GAAP net income; and the GAAP measure most comparable to free cash flow is cash flows provided by operating activities. Reconciliations of each of these non-GAAP financial measures to the corresponding GAAP measures are included below.

Use and Economic Substance of Non-GAAP Financial Measures

We use these non-GAAP measures when evaluating our operating performance and for internal planning and forecasting purposes. We believe that such measures help indicate underlying trends in our business, are important in comparing current results with prior period results, and are useful to investors and financial analysts in assessing our operating performance. For example, we consider non-GAAP net income (loss) to be an important indicator of the overall performance because it eliminates the effects of events that are either not part of our core operations or are non-cash compensation expenses. In addition, we consider adjusted EBITDA to be an important indicator of our operational strength and performance of our business and a good measure of our historical operating trend. Moreover, we consider free cash flow to be an indicator of our operating trend and performance of our business.

The following is an explanation of the non-GAAP measures that we utilize, including the adjustments that we excluded as part of the non-GAAP measures for the three and nine month periods ended September 30, 2013 and 2012, respectively, as well as reasons for excluding these individual items:

• We define non-GAAP net income as net income before expenses related to stock-based compensation and amortization expenses related to acquisition-related intangible assets, net of related tax effects.

• We define adjusted EBITDA as net income, excluding depreciation, amortization, stock-based compensation, interest, income taxes and other income (expense). Adjusted EBITDA eliminates items that are either not part of our core

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operations or do not require a cash outlay, such as stock-based compensation. Adjusted EBITDA also excludes depreciation and amortization expense, which is based on our estimate of the useful life of tangible and intangible assets. These estimates could vary from actual performance of the asset, are based on historical cost incurred to build out our deployed network and may not be indicative of current or future capital expenditures.

• We define free cash flow as net cash provided by (used in) operating activities less capital expenditures. Management defines capital expenditures as purchases of property and equipment, which includes capitalization of internal-use software development costs.

Material Limitations Associated with the Use of Non-GAAP Financial Measures

Non-GAAP net income, non-GAAP net income per share, adjusted EBITDA and free cash flow may have limitations as analytical tools. The non-GAAP financial information presented here should be considered in conjunction with, and not as a substitute for or superior to the financial information presented in accordance with GAAP and should not be considered measures of our liquidity. There are significant limitations associated with the use of non-GAAP financial measures. Further, these measures may differ from the non-GAAP information, even where similarly titled, used by other companies and therefore should not be used to compare our performance to that of other companies.

Non-GAAP Net Income and Non-GAAP Net Income per Share

Net income for the three month period ended September 30, 2013 was $106.9 million, or $3.83 per basic share and $3.70 per diluted share, compared to net income of $60.3 million, or $2.26 per basic share and $2.21 per diluted share, for the three month period ended September 30, 2012. Net income for the nine month period ended September 30, 2013 was $42.0 million, or $1.52 per basic share and $1.47 per diluted share, compared to a net income of $3.5 million, or $0.13 per basic and diluted share, for the nine month period ended September 30, 2012. Excluding stock-based compensation charges and amortization expense related to acquisition-related assets, net of tax effects, non-GAAP net income for the three month period ended September 30, 2013 was $112.4 million, or $4.03 per basic share and $3.90 per diluted share, compared to a non-GAAP net income of $65.5 million, or $2.46 per basic share and $2.40 per diluted share, for the three month period ended September 30, 2012. Excluding stock-based compensation charges and amortization expense related to acquisition-related assets, net of tax effects, non-GAAP net income for the nine month period ended September 30, 2013 was $59.1 million, or $2.14 per basic share and $2.06 per diluted share, compared to a non-GAAP net income of $19.0 million, or $0.72 per basic and $0.70 per diluted share, for the nine month period ended September 30, 2012. The reconciliation of GAAP net income to non-GAAP net income is set forth below:

	Three Months Ended September 30,
	2013		2012
	(In thousands, except share and per share data)
GAAP net income	$	106,857	$	60,348
ADD: Stock-based compensation (1)		3,821		3,341
ADD: Amortization expense of acquired intangible assets (1)		1,703		1,808
Non-GAAP net income	$	112,381	$	65,497
GAAP net income per basic share	$	3.83	$	2.26
ADD: Stock-based compensation (1)		0.14		0.13
ADD: Amortization expense of acquired intangible assets (1)		0.06		0.07
Non-GAAP net income per basic share	$	4.03	$	2.46
GAAP net income per diluted share	$	3.70	$	2.21
ADD: Stock-based compensation (1)		0.14		0.12
ADD: Amortization expense of acquired intangible assets (1)		0.06		0.07
Non-GAAP net income per diluted share	$	3.90	$	2.40
Weighted average number of common shares outstanding
Basic		27,920,409		26,653,252
Diluted		28,843,010		27,325,949

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	Nine Months Ended September 30,
	2013		2012
	(In thousands, except share and per share data)
GAAP net income	$	41,969	$	3,499
ADD: Stock-based compensation (1)		11,832		10,018
ADD: Amortization expense of acquired intangible assets (1)		5,260		5,438
Non-GAAP net income	$	59,061	$	18,955
GAAP net income per basic share	$	1.52	$	0.13
ADD: Stock-based compensation (1)		0.42		0.38
ADD: Amortization expense of acquired intangible assets (1)		0.19		0.21
Non-GAAP net income per basic share	$	2.13	$	0.72
GAAP net income per diluted share	$	1.47	$	0.13
ADD: Stock-based compensation (1)		0.41		0.37
ADD: Amortization expense of acquired intangible assets (1)		0.18		0.20
Non-GAAP net income per diluted share	$	2.06	$	0.70
Weighted average number of common shares outstanding
Basic		27,693,054		26,470,634
Diluted		28,616,552		27,069,569

(1) The non-GAAP adjustments would have no impact on the provision for income taxes recorded for the three or nine month periods ended September 30, 2013 or 2012, respectively.

Adjusted EBITDA

Adjusted EBITDA was $123.2 million and $69.1 million for the three month periods ended September 30, 2013 and 2012, respectively. Adjusted EBITDA was $82.3 million and $32.3 million for the nine month periods ended September 30, 2013 and 2012, respectively.

The reconciliation of net income to adjusted EBITDA is set forth below (in thousands):

	Three Months Ended September 30,						Nine Months Ended September 30,
	2013			2012			2013		2012
Net income	$	106,857		$	60,348		$	41,969	$	3,499
Add back:
Depreciation and amortization		7,055			6,428			20,616		18,852
Stock-based compensation expense		3,821			3,341			11,832		10,018
Other (income) expense		(233	)		(619	)		884		(1,316	)
Interest expense		451			300			1,212		1,197
(Benefit from) provision for income tax		5,284			(718	)		5,828		95
Adjusted EBITDA	$	123,235		$	69,080		$	82,341	$	32,345

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Free Cash Flow

Cash flows provided by operating activities were $21.3 million and $33.5 million for the three and nine month periods ended September 30, 2013, respectively. Cash flows provided by operating activities were $8.6 million and $12.9 million for the three and nine month periods ended September 30, 2012, respectively. We had positive free cash flow of $15.6 million and $6.0 million for the three month periods ended September 30, 2013 and 2012, respectively. We had positive free cash flow of $0.5 million and $1.1 million for the nine month periods ended September 30, 2013 and 2012, respectively. The reconciliation of cash flows from operating activities to free cash flow is set forth below (in thousands):

	Three Months Ended September 30,						Nine Months Ended September 30,
	2013			2012			2013			2012
Net cash provided by operating activities	$	21,295		$	8,625		$	33,459		$	12,866
Subtract:
Purchases of property and equipment		(5,739	)		(2,618	)		(32,925	)		(11,752	)
Free cash flow	$	15,556		$	6,007		$	534		$	1,114

Item 3. Quantitative and Qualitative Disclosures About Market Risk

Except as disclosed herein, there have been no material changes during the three or nine month periods ended September 30, 2013 in the interest rate risk information and foreign exchange risk information disclosed in the “Quantitative and Qualitative Disclosures About Market Risk” subsection of the section entitled “Management’s Discussion and Analysis of Financial Condition and Results of Operations” in our 2012 Form 10-K.

Foreign Currency Exchange Risk

Our international business is subject to risks, including, but not limited to unique economic conditions, changes in political climate, differing tax structures, other regulations and restrictions, and foreign exchange rate volatility. Accordingly, our future results could be materially adversely impacted by changes in these or other factors.

A substantial majority of our foreign expense and sales activities are transacted in local currencies, including Australian dollars, British pounds, Canadian dollars and New Zealand dollars. In addition, our foreign revenues are denominated in local currencies. Fluctuations in the foreign currency rates could affect our revenues, cost of revenues and profit margins and could result in exchange losses. In addition, currency devaluations can result in a loss if we maintain deposits in a foreign currency. During the three and nine month periods ended September 30, 2013, approximately 19% of our consolidated revenues in each period were generated outside the United States, and we anticipate that revenues generated outside the United States will continue to represent greater than 10% of our consolidated revenues for fiscal 2013 and will continue to grow in subsequent fiscal years.

We believe that the operating expenses of our international subsidiaries that are incurred in local currencies will not have a material adverse effect on our business, results of operations or financial condition for fiscal 2013. Our operating results and certain assets and liabilities that are denominated in foreign currencies are affected by changes in the relative strength of the U.S. dollar against the applicable foreign currency. Our expenses denominated in foreign currencies are positively affected when the U.S. dollar strengthens against the applicable foreign currency and adversely affected when the U.S. dollar weakens.

During the three month periods ended September 30, 2013 and 2012, we incurred net foreign exchange gains totaling $0.2 million and $0.6 million, respectively. During the nine month periods ended September 30, 2013 and 2012, we incurred net foreign exchange gains (losses) totaling ($1.2) million and $1.2 million, respectively. During the three month period ended September 30, 2013, we realized a loss of ($0.1) million related to transactions denominated in foreign currencies. During the three month period ended September 30, 2012, there was no material realized gain or loss related to transactions denominated in foreign currencies. During the nine month periods ended September 30, 2013 and 2012, we realized (losses) gains of ($0.7) million and $0.5 million, respectively, related to transactions denominated in foreign currencies. As of September 30, 2013, we had an intercompany receivable from our Australian subsidiary that is denominated in Australian dollars and not deemed to be of a “long-term investment” nature totaling $16.6 million at September 30, 2013 exchange rates ($17.8 million Australian).

A hypothetical 10% increase or decrease in foreign currencies in which we transact would not have a material adverse effect on our financial condition or results of operations other than the impact on the unrealized gain (loss) on the intercompany receivable held by us from our Australian subsidiary that is denominated in Australian dollars, and for which a hypothetical 10% increase or decrease in the foreign currency would result in an incremental $1.7 million gain or loss.

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We currently do not have a program in place that is designed to mitigate our exposure to changes in foreign currency exchange rates. We are evaluating certain potential programs, including the use of derivative financial instruments, to reduce our exposure to foreign exchange gains and losses, and the volatility of future cash flows caused by changes in currency exchange rates. The utilization of forward foreign currency contracts would reduce, but would not eliminate, the impact of currency exchange rate movements.

Item 4. Controls and Procedures

Disclosure Controls and Procedures.

Our principal executive officer and principal financial officer, after evaluating the effectiveness of our disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) as of the end of the period covered by this Quarterly Report on Form 10-Q, have concluded that, based on such evaluation, our disclosure controls and procedures were effective 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 the time periods specified in the SEC’s rules and forms, and is accumulated and communicated to our management, including our principal executive and principal financial officers, or persons performing similar functions, as appropriate to allow timely decisions regarding required disclosure.

Internal Control over Financial Reporting.

No change in our internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act) occurred during the fiscal quarter ended September 30, 2013 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

We are subject to legal proceedings, claims and litigation arising in the ordinary course of business. We do not expect the ultimate costs to resolve these matters to have a material adverse effect on our consolidated financial position, results of operations or cash flows. In addition to ordinary-course litigation, we are a party to the litigation described below.

On May 3, 2013, a purported shareholder of the Company filed a derivative and class action complaint in the United States District Court for the District of Delaware, or the Court, against certain of our officers and directors, as well as the Company as a nominal defendant. The complaint asserts derivative claims, purportedly brought on our behalf, for breach of fiduciary duty, waste of corporate assets, and unjust enrichment in connection with certain equity grants (awarded in 2010, 2012, and 2013) that allegedly exceeded an annual limit on per-employee equity grants purported to be contained in our 2007 Plan. The complaint also asserts a direct claim, brought on behalf of the plaintiff and a proposed class of our shareholders, alleging that our recently-filed proxy statement is false and misleading because it fails to disclose that the equity grants were improper. The plaintiff seeks, among other relief, rescission of the equity grants, unspecified damages, injunctive relief, disgorgement, attorneys’ fees, and such other relief as the Court may deem proper.

We believe that the Company and the other defendants have substantial legal and factual defenses to the claims and allegations contained in the complaint, and we are pursuing these defenses vigorously. There can be no assurance, however, that such efforts will be successful, and an adverse resolution of the lawsuit could have a material effect on our financial condition, results of operations and cash flows. In addition to negatively impacting our sales and prospects, diverting financial and management resources and general business disruption, we may suffer from adverse publicity that could harm our reputation and negatively impact our stock price, regardless of whether the allegations are valid or whether we are ultimately liable. Although we carry insurance for these types of claims and currently believe that this claim would be covered by our insurance, there is no guarantee that this claim will be covered. A denial of the claim by the insurance provider or a judgment significantly in excess of our insurance coverage could materially and adversely affect our financial condition, results of operations and cash flows. We have determined that it is neither remote nor probable that we will incur a loss related to this matter. We are not presently able to reasonably estimate potential losses, if any, related to the lawsuit.

43

Item 1A. Risk Factors

We operate in a rapidly changing environment that involves a number of risks that could materially affect our business, financial condition or future results, some of which are beyond our control. In addition to the other information set forth in this Quarterly Report on Form 10-Q, the risks and uncertainties that we believe are most important for you to consider are discussed in Part I — Item 1A under the heading “Risk Factors” in our 2012 Form 10-K. During the nine months ended September 30, 2013, there were no material changes to the risk factors that were disclosed in our 2012 Form 10-K other than as set forth below.

The following risk factors replace and supersede the corresponding risk factors set forth in our 2012 Form 10-K and our 2013 First and Second Quarter Form 10-Q’s:

A substantial majority of our revenues are and have been generated from open market program sales to a certain electric power grid operator customer, and the modification or termination of this open market program or sales relationship, or the modification or termination of a sales relationship with any future significant electric power grid operator or utility customer could materially and adversely affect our business.

During the years ended December 31, 2012, 2011 and 2010, revenues generated from open market sales to PJM, an electric power grid operator customer, accounted for 40%, 53% and 60%, respectively, of our total revenues. The modification or termination of our sales relationship with PJM, or the modification or termination of any of PJM’s open market programs in which we participate, including increases to the operational requirements related to the provision of demand response, modifications to the cost, quantity and clearing mechanics related to our participation in capacity auctions or other limitations on our ability to effectively manage our portfolio of demand response capacity, could significantly reduce our future revenues and profit margins and have a material adverse effect on our results of operations and financial condition. For example, in June 2012, PJM discontinued its Interruptible Load for Reliability program, or ILR program, which is a program in which we had historically been an active participant. The discontinuance of the ILR program by PJM reduced the flexibility that we had to manage our portfolio of demand response capacity in the PJM market and impacted our revenues and profit margins. In addition, in February 2012, the Federal Energy Regulatory Commission, or FERC, issued an order substantially accepting a proposal by PJM regarding certain market rule changes with respect to capacity compliance measurement and verification of demand response resources in the PJM capacity market, which we refer to as the PJM proposal. The FERC order resulted in the immediate implementation of the PJM proposal. As a result, our revenues and profit margins and our results of operations and financial condition were negatively impacted, although these impacts have been offset due to improved management of our portfolio of demand response capacity, including the adjustment of our zonal capacity obligations through our participation in PJM incremental auctions, and our future growth in MW in the PJM market. In addition, the introduction in the PJM market of the summer-only, extended-summer and annual demand response products beginning in the 2014/2015 delivery year could adversely impact our ability to successfully manage our portfolio of demand response capacity in that program and have a material adverse effect on our results of operations and financial condition.

The expiration of our existing utility contracts without obtaining renewal or replacement utility contracts, or the termination of any of our existing utility contracts, could negatively impact our business by reducing our revenues and profit margins, thereby having a material adverse effect on our results of operations and financial condition.

We have entered into utility contracts with our electric power grid operator and utility customers in different geographic regions in the United States, as well as in Australia, Canada, New Zealand and the United Kingdom, and are regularly in discussions to enter into new utility contracts with electric power grid operators and utilities. However, there can be no assurance that we will be able to renew or extend our existing utility contracts or enter into new utility contracts on favorable terms, if at all. If, upon expiration, we are unable to renew or extend our existing utility contracts and are unable to enter into new utility contracts, our future revenues and profit margins could be significantly reduced, which could have a material adverse effect on our results of operations and financial condition.

Our existing utility contracts generally contain termination provisions pursuant to which the utility customer can terminate under certain circumstances, including in the event that we fail to comply with the terms or provisions contained therein. In addition, in the event that we breach any of our utility contracts, we may be liable to pay the utility customer an associated fee or penalty payment in connection with such breach. The termination of any of our existing utility contracts, or any fees or penalties payable by us in connection with a breach of our existing utility contracts, could negatively impact our business by reducing our revenues and profit margins, thereby having a material adverse effect on our results of operations and financial condition.

44

We are currently subject to litigation, the unfavorable outcome of which could have a material adverse effect on our financial condition, results of operations and cash flows.

On May 3, 2013, a purported shareholder of the Company filed a derivative and class action complaint in the United States District Court for the District of Delaware against certain of our officers and directors, as well as the Company as a nominal defendant, alleging breach of fiduciary duty, waste of corporate assets, and unjust enrichment in connection with certain equity grants (awarded in 2010, 2012, and 2013) that allegedly exceeded an annual limit on per-employee equity grants purported to be contained in our 2007 Plan. While we believe we have substantial legal and factual defenses to each of the claims in this lawsuit and we are pursuing these defenses vigorously, the outcome of this litigation is difficult to predict and quantify, and the defense against such claims or actions may be costly. There can be no assurance that our efforts regarding this lawsuit will be successful, and an adverse resolution of the lawsuit could have a material effect on our financial condition, results of operations and cash flows. In addition to negatively impacting our sales and prospects, diverting financial and management resources and general business disruption, we may suffer from adverse publicity that could harm our reputation and negatively impact our stock price, regardless of whether the allegations are valid or whether we are ultimately liable. Further, in the event that the insurance that we carry for this type of claim does not provide coverage, or if there is a judgment that is significantly in excess of any such insurance coverage, our financial condition, results of operations and cash flows could be materially and adversely impacted.

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

The following table provides information about our purchases of our common stock during the third quarter of fiscal 2013:

Fiscal Period	Total Number of Shares Purchased		Average Price Paid per Share (1)		Total Number of Shares Purchased as Part of Publicly Announced Plans or  Programs (2)		Approximate Dollar Value of Shares that May Yet Be Purchased Under the  Plans or Programs (2)
July 1, 2013 - July 31, 2013		—	$	—		—	$	—
August 1, 2013 - August 31, 2013		330,843		15.11		330,843		25,000,000
September 1, 2013 - September 30, 2013		—		—		—		25,000,000
Total for the third quarter of 2013		330,843	$	15.11		330,843	$	25,000,000

(1) Average price paid per share includes commissions paid in connection with our publicly announced share repurchase program and is rounded to the nearest two decimal places.

(2) On August 6, 2013, our board of directors authorized and we announced the repurchase of up to $30 million of our common stock during the twelve month period ending August 6, 2014, unless earlier terminated by the board of directors.

45

Item 6. Exhibits.

10.1	First Amendment to Credit Agreement by and among EnerNOC, Inc., several lenders from time to time party thereto and Silicon Valley Bank, dated as of August 2, 2013, filed as Exhibit 10.1 to the Registrant’s Current Report on Form 8-K filed August 6, 2013 (File No. 001-33471), is hereby incorporated by reference as Exhibit 10.1.
10.2@*	EnerNOC, Inc. Third Amended and Restated Non-Employee Director Compensation Policy, as amended.
31.1*	Certification of Chief Executive Officer of EnerNOC, Inc. pursuant to Rule 13a-14(a) or Rule 15d-14(a) promulgated under the Securities Exchange Act of 1934, as amended.
31.2*	Certification of Chief Financial Officer of EnerNOC, Inc. pursuant to Rule 13a-14(a) or Rule 15d-14(a) promulgated under the Securities Exchange Act of 1934, as amended.
32.1*	Certification of the Chief Executive Officer and Chief Financial Officer of EnerNOC, Inc. pursuant to Rule 13a-14(b) promulgated under the Securities Exchange Act of 1934, as amended, and 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
101*	The following materials from EnerNOC, Inc.’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2013, formatted in XBRL (Extensible Business Reporting Language): (i) the Unaudited Condensed Consolidated Balance Sheets, (ii) the Unaudited Condensed Consolidated Statements of Income, (iii) the Unaudited Condensed Consolidated Statements of Comprehensive Income, (iv) the Unaudited Condensed Consolidated Statements of Cash Flows, and (v) Notes to Unaudited Condensed Consolidated Financial Statements.

* Filed herewith

@ Management contract, compensatory plan or arrangement

46

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.

	EnerNOC, Inc.
Date: November 7, 2013	By:	/s/ Timothy G. Healy
		Timothy G. Healy
		Chief Executive Officer

Date: November 7, 2013	By:	/s/ Neil Moses
		Neil Moses
		Chief Financial Officer

47

EX-10.2

Exhibit 10.2

ENERNOC, INC.

THIRD AMENDED AND RESTATED NON-EMPLOYEE DIRECTOR COMPENSATION POLICY

The Board of Directors of EnerNOC, Inc. (the “Company”) has approved the following policy which establishes compensation to be paid to non-employee directors of the Company, to provide an inducement to obtain and retain the services of qualified persons to serve as members of the Company’s Board of Directors. Each such director will receive as compensation for his or her services (i) an equity grant upon his or her initial appointment or election to the Board of Directors of the Company, (ii) an annual equity grant for his or her continued service on the Board of Directors and (iii) annual fees payable in cash and/or shares of the Company’s common stock, all as further set forth herein.

Applicable Persons

This Policy shall apply to each director of the Company who (a) is not an employee of the Company or any Affiliate, (b) is not associated with the Company’s principal stockholders, and (c) does not receive compensation as a consultant to the Company or any Affiliate unless such compensation is received solely for services provided as a member of the Strategic Advisory Board (each, an “Outside Director”). Affiliate shall mean a corporation which is a direct or indirect parent or subsidiary of the Company, as determined pursuant to Section 424 of the Internal Revenue Code of 1986, as amended.

Equity Grant upon Initial Appointment or Election as a Director

Number of Shares

Each new Outside Director on or around the date of his or her initial appointment or election to the Board of Directors, shall be granted such number of restricted shares of the Company’s common stock, restricted stock units and/or a non-qualified stock option to purchase such number of shares of the Company’s common stock as determined by the Compensation Committee of the Board of Directors (the “Compensation Committee) on the date of grant in accordance with the “value transfer” model, as further described in the “Compensation Discussion and Analysis” of the Company’s proxy statement for the 2011 annual meeting of stockholders.

Vesting Provision

The restricted shares, restricted stock units and/or options shall vest over a three-year period, at a rate of 8.33% per quarter.

Exercise Price and Term of Option

Each option granted shall have an exercise price per share equal to the Fair Market Value (as defined in the Company’s then applicable stockholder approved stock plan (the “Stock Plan”)) of the shares of common stock of the Company on the date of grant of the option, have a term of seven (7) years and shall be subject to the terms and conditions of the Stock Plan. Each such option grant shall be evidenced by the issuance of a non-qualified stock option agreement.

Effect on Stock or Unit Grants of Early Termination of Service

If an Outside Director:

a. ceases to be a member of the Board of Directors for any reason other than death or disability, all restricted shares or restricted stock units that remain subject to forfeiture provisions shall be immediately forfeited to the Company; or

b. ceases to be a member of the Board of Directors by reason of his or her death or disability, all restricted shares or restricted stock units that remain subject to forfeiture provisions shall be immediately forfeited to the Company; provided, however, that in the event such forfeiture provisions lapse periodically, such provisions shall lapse to the extent of a pro rata portion of the restricted shares or restricted stock units subject to such grant through the date of his or her death or disability as would have lapsed had he or she not died or become disabled.

Effect on Options of Early Termination of Service

If an Outside Director:

a. ceases to be a member of the Board of Directors for any reason other than death or disability, any then vested and unexercised options granted to such Outside Director may be exercised by the director within a period of three (3) months after the date the director ceases to be a member of the Board of Directors and in no event later than the expiration date of the option; or

b. ceases to be a member of the Board of Directors by reason of his or her death or disability, any then vested and unexercised options granted to such director may be exercised by the director (or by the director’s personal representative, or the director’s survivors) within a period of one (1) year after the date the director ceases to be a member of the Board of Directors and in no event later than the expiration date of the option.

Annual Equity Grant and Fees

Each Outside Director shall be compensated on an annual basis for providing services to the Company and will receive each year he or she is in office:

• An equity award in the form of:

• a fully vested stock award of the Company’s common stock as determined by the Compensation Committee on the date of grant in accordance with the “value transfer” model, as further described in the “Compensation Discussion and Analysis” of the Company’s proxy statement for the 2011 annual meeting of stockholders; and/or

• a fully vested non-qualified stock option to purchase such number of shares of the Company’s common stock as determined by the Compensation Committee on the date of grant in accordance with the “value transfer” model, as further described in the “Compensation Discussion and Analysis” of the Company’s proxy statement for the 2011 annual meeting of stockholders. Each such stock option will terminate on the earlier of seven (7) years from the date of grant or three (3) months after the recipient ceases to serve as a director, except in the case of death or disability, in which event the option will terminate one (1) year from the date of the director’s death or disability. The exercise price per share of these options will be equal to the Fair Market Value of the shares of common stock of the Company on the date of grant of the option

• a $30,000 annual retainer fee (the “Basic Retainer Fee”) paid in cash or shares of the Company’s common stock, at the election of the director, in advance; and

• a cash fee of $1,000 for each board meeting attended in person and a cash fee of $500 for each board meeting attended by telephone or by other means of communication payable in arrears on a quarterly basis.

Board Committee and Lead Director Compensation

The (i) chairman and members of the Company’s audit, compensation, nominating and governance, mergers and acquisition and technology committees and (ii) the lead independent director will receive annual fees (the “Additional Retainer Fees” and collectively with the Basic Retainer Fee, the “Retainer Fees”) payable in cash or shares of the Company’s common stock, at the election of the director, in advance as follows:

Chairman	Other Members
Audit committee:	$	20,000	$	10,000
Compensation committee:	$	15,000	$	7,500
Nominating and Governance committee:	$	10,000	$	5,000
Mergers and Acquisitions committee:	$	10,000	$	5,000
Mergers and Acquisitions committee:	$	10,000	$	5,000

Lead Independent Director: $20,000

In the event that a director elects to receive all or a portion of the Retainer Fees in shares of the Company’s common stock, the grant date of such common stock shall be the third business day after the date on which the Company announces its financial results for the fourth quarter and fiscal year ended December 31 of each year.

Share Retention and Ownership Guidelines

In January 2013, the Compensation Committee approved the Share Retention and Ownership Guidelines for members of the Company’s Board of Directors. The Share Retention and Ownership Guidelines provide that within four years of the date the policy became effective, or within four years after becoming a director, each director shall own a minimum of 4x the Basic Retainer Fee. The ownership guideline for each director will be converted into a number of shares on the first day of each fiscal year based on the average closing price of a share of the Company’s stock for the previous fiscal year. The Compensation Committee is responsible for monitoring compliance with the Share Retention and Ownership Guidelines. Shares that count toward the ownership target include all shares directly or beneficially owned by the director, unvested restricted stock granted under the Stock Plan (restricted stock will be applied toward the ownership requirements based on the value of restricted stock after taking into account any required share withholding) and shares purchased on the open market.

Expenses

Upon presentation of documentation of such expenses reasonably satisfactory to the Company, each Outside Director shall be reimbursed for his or her reasonable out-of-pocket business expenses incurred in connection with attending meetings of the Board of Directors, Committees thereof or in connection with other Board related business.

Amendments

The Board of Directors shall review this Policy from time to time to assess whether any amendments in the type and amount of compensation provided herein should be adjusted in order to fulfill the objectives of this Policy.

EX-31.1

Exhibit 31.1

CERTIFICATIONS

I, Timothy G. Healy, certify that:

1. I have reviewed this quarterly report on Form 10-Q of EnerNOC, Inc.;

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

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

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

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

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

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

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

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

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

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

Date: November 7, 2013

By:	/s/ Timothy G. Healy
	Timothy G. Healy
	Chief Executive Officer
	(principal executive officer)

EX-31.2

Exhibit 31.2

CERTIFICATIONS

I, Neil Moses, certify that:

1. I have reviewed this quarterly report on Form 10-Q of EnerNOC, Inc.;

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

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

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

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

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

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

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

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

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

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

Date: November 7, 2013

By:	/s/ Neil Moses
	Neil Moses
	Chief Financial Officer
	(principal financial officer)

EX-32.1

Exhibit 32.1

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED

PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report on Form 10-Q of EnerNOC, Inc. (the “Company”), for the quarter ended September 30, 2013, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), we, Timothy G. Healy, Chief Executive Officer of the Company and Neil Moses, Chief Financial Officer of the Company, do hereby certify, to such officer’s knowledge, pursuant to Section 1350 of Chapter 63 of Title 18, United States Code, 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.

	Date: November 7, 2013
By:	/s/ Timothy G. Healy
	Timothy G. Healy
	Chief Executive Officer
By:	/s/ Neil Moses
	Neil Moses
	Chief Financial Officer

XML

Legal Proceedings

9 Months Ended

Sep. 30, 2013

Commitments And Contingencies Disclosure [Abstract]

Legal Proceedings

11. Legal Proceedings

The Company is subject to legal proceedings, claims and litigation arising in the ordinary course of business. In accordance with ASC 450, Contingencies, the Company accrues for losses that are determined to be both probable and estimable. As of September 30, 2013, the amounts accrued related to probable and estimable losses are not material and the Company does not expect the ultimate costs to resolve these matters to have a material adverse effect on its consolidated financial position, results of operations or cash flows. In addition to ordinary-course litigation, the Company is a party to the litigation described below.

On May 3, 2013, a purported shareholder of the Company filed a derivative and class action complaint in the United States District Court for the District of Delaware (the Court) against certain officers and directors of the Company as well as the Company as a nominal defendant. The complaint asserts derivative claims, purportedly brought on behalf of the Company, for breach of fiduciary duty, waste of corporate assets, and unjust enrichment in connection with certain equity grants (awarded in 2010, 2012, and 2013) that allegedly exceeded an annual limit on per-employee equity grants purported to be contained in the 2007 Plan. The complaint also asserts a direct claim, brought on behalf of the plaintiff and a proposed class of the Company’s shareholders, alleging the Company’s proxy statement filed on April 26, 2013 is false and misleading because it fails to disclose that the equity grants were improper. The plaintiff seeks, among other relief, rescission of the equity grants, unspecified damages, injunctive relief, disgorgement, attorneys’ fees, and such other relief as the Court may deem proper.

Company management believes that the Company and the other defendants have substantial legal and factual defenses to the claims and allegations contained in the complaint, and is pursuing these defenses vigorously. There can be no assurance, however, that such efforts will be successful, and an adverse resolution of the lawsuit could have a material effect on the Company’s financial condition, results of operations and cash flows. In addition to negatively impacting the Company’s sales and prospects, diverting financial and management resources and general business disruption, the Company may suffer from adverse publicity that could harm its reputation and negatively impact its stock price, regardless of whether the allegations are valid or whether the Company is ultimately liable. Although the Company carries insurance for these types of claims and currently believes that this claim would be covered by its insurance, there is no guarantee that this claim will be covered. A denial of the claim by the insurance provider or a judgment significantly in excess of the Company’s insurance coverage could materially and adversely affect its financial condition, results of operations and cash flows. The Company has determined that it is neither remote nor probable that the Company will incur a loss related to this matter. The Company is not presently able to reasonably estimate potential losses, if any, related to the lawsuit.

XML

Condensed Consolidated Statements of Income (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Revenues:
DemandSMART	$ 267,479	$ 169,658	$ 318,553	$ 213,586
EfficiencySMART, SupplySMART and other	10,994	8,289	28,923	22,084
Total revenues	278,473	177,947	347,476	235,670
Cost of revenues	126,072	82,947	172,142	126,437
Gross profit	152,401	95,000	175,334	109,233
Operating expenses:
Selling and marketing	15,761	13,424	50,444	41,342
General and administrative	19,746	18,351	60,872	52,880
Research and development	4,535	3,914	14,125	11,536
Total operating expenses	40,042	35,689	125,441	105,758
Income from operations	112,359	59,311	49,893	3,475
Other income (expense), net	233	619	(884)	1,316
Interest expense	(451)	(300)	(1,212)	(1,197)
Income before income tax	112,141	59,630	47,797	3,594
(Provision for) benefit from income tax	(5,284)	718	(5,828)	(95)
Net Income	$ 106,857	$ 60,348	$ 41,969	$ 3,499
Net income per share
Basic	$ 3.83	$ 2.26	$ 1.52	$ 0.13
Diluted	$ 3.70	$ 2.21	$ 1.47	$ 0.13
Weighted average number of common shares used in computing net income per common share
Basic	27,920,409	26,653,252	27,693,054	26,470,634
Diluted	28,843,010	27,325,949	28,616,552	27,069,569

XML

Disclosure of Fair Value of Financial Instruments

9 Months Ended

Sep. 30, 2013

Fair Value Disclosures [Abstract]

Disclosure of Fair Value of Financial Instruments

4. Disclosure of Fair Value of Financial Instruments

The Company’s financial instruments mainly consist of cash and cash equivalents, restricted cash, accounts receivable and accounts payable. The carrying amounts of the Company’s cash equivalents, restricted cash, accounts receivable and accounts payable approximate their fair value due to the short-term nature of these instruments.

XML

Stockholders' Equity (Tables)

9 Months Ended

Sep. 30, 2013

Weighted Average Assumptions Used to Estimate Fair Value of Stock Options

The fair value of options granted was estimated at the date of grant using the following weighted average assumptions:

	Nine Months Ended September 30,
	2013			2012
Risk-free interest rate		1.8	%		1.8	%
Vesting term, in years		2.22			2.22
Expected annual volatility		75	%		78	%
Expected dividend yield		—	%		—	%
Exit rate pre-vesting		7.7	%		8.0	%
Exit rate post-vesting		14.06	%		14.06	%

Components of Stock-Based Compensation Expense

The components of stock based compensation expense are disclosed below:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
Stock options	$	333	$	471	$	1,081	$	1,584
Restricted stock and restricted stock units		3,488		2,870		10,751		8,434
Total	$	3,821	$	3,341	$	11,832	$	10,018

Stock-Based Compensation

Stock based compensation is recorded in the accompanying unaudited condensed consolidated statements of income, as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
Selling and marketing expenses	$	1,426	$	1,182	$	4,272	$	3,428
General and administrative expenses		2,049		1,908		6,521		5,712
Research and development expenses		346		251		1,039		878
Total	$	3,821	$	3,341	$	11,832	$	10,018

Summary of Company's Stock Option Activity

The following is a summary of the Company’s stock option activity during the nine month period ended September 30, 2013:

	Nine Months Ended September 30, 2013
	Number of Shares Underlying Options			Exercise Price Per Share	Weighted- Average Exercise Price Per Share		Aggregate Intrinsic Value
Outstanding at December 31, 2012		1,275,311		$0.17 - $48.06	$	16.26	$	2,915	(2)
Granted		4,000				16.34
Exercised		(163,332	)			8.39	$	1,290	(3)
Cancelled		(36,388	)			22.41
Outstanding at September 30, 2013		1,079,591		$0.17 - $48.06		17.24	$	4,107	(4)
Weighted average remaining contractual life in years: 3.2
Exercisable at end of period		1,006,039		$0.17 - $48.06	$	16.68	$	4,061	(4)
Weighted average remaining contractual life in years: 3.0
Vested or expected to vest at September 30, 2013 (1)		1,075,506		$0.17 - $48.06	$	17.24	$	4,101	(4)

(1) This represents the number of vested options as of September 30, 2013 plus the number of unvested options expected to vest as of September 30, 2013 based on the unvested options outstanding at September 30, 2013, adjusted for the estimated forfeiture rate of 7.7%.

(2) The aggregate intrinsic value was calculated based on the positive difference between the estimated fair value of the Company’s common stock on December 31, 2012 of $11.75 and the exercise price of the underlying options.

(3) The aggregate intrinsic value was calculated based on the positive difference between the fair value of the Company’s common stock on the applicable exercise dates and the exercise price of the underlying options.

(4) The aggregate intrinsic value was calculated based on the positive difference between the estimated fair value of the Company’s common stock on September 30, 2013 of $14.98 and the exercise price of the underlying options.

Stock Options Activity Additional Information

Additional Information About Stock Options

	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
	In thousands, except share and per share amounts				In thousands, except share and per share amounts
Total number of options granted during the period		500		5,100		4,000		10,550
Weighted-average fair value per share of options granted	$	8.68	$	6.15	$	10.15	$	5.37
Total intrinsic value of options exercised (1)	$	239	$	209	$	1,290	$	1,139

(1) Represents the difference between the market price at exercise and the price paid to exercise the options.

Restricted Stock [Member]

Summary of Company's Restricted Stock and Restricted Stock Units Activity

The following table summarizes the Company’s restricted stock activity during the nine month period ended September 30, 2013:

	Number of Shares			Weighted Average Grant Date Fair Value Per Share
Nonvested at December 31, 2012		2,135,496		$	9.78
Granted		1,491,269			16.47
Vested		(833,521	)		11.06
Cancelled		(395,382	)		11.36
Nonvested at September 30, 2013		2,397,862		$	13.27

Additional Information about Restricted Stock and Restricted Stock Units

Additional Information about Restricted Stock

	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
	in thousands, except share and per share amounts
Total number of shares of restricted stock granted during the period		80,703		212,950		1,491,269		1,513,828
Weighted average fair value per share of restricted stock granted	$	13.53	$	10.72	$	16.47	$	7.87
Total number of shares of restricted stock vested during the period		138,282		50,174		833,521		244,513
Total fair value of shares of restricted stock vested during the period	$	2,024	$	423	$	13,359	$	2,103

Restricted Stock Units [Member]

Summary of Company's Restricted Stock and Restricted Stock Units Activity

The following table summarizes the Company’s restricted stock unit activity during the nine month period ended September 30, 2013:

	Number of Shares			Weighted Average Grant Date Fair Value Per Share
Nonvested at December 31, 2012		106,478		$	27.88
Granted		—			—
Vested		(56,603	)		27.01
Cancelled		(15,625	)		29.48
Nonvested at September 30, 2013		34,250		$	28.59

Additional Information about Restricted Stock and Restricted Stock Units

Additional Information about Restricted Stock Units

	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
	in thousands, except share and per share amounts
Total number of shares of restricted stock vested during the period		—		6,728		56,603		85,312
Total fair value of shares of restricted stock vested during the period	$	—	$	61	$	948	$	792

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Recent Accounting Pronouncements

9 Months Ended

Sep. 30, 2013

Accounting Changes And Error Corrections [Abstract]

Recent Accounting Pronouncements

12. Recent Accounting Pronouncements

In July 2013, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2013-11, Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists (ASU 2013-11). The amendments in ASU 2013-11 require an entity to present an unrecognized tax benefit in the financial statements as a reduction to a deferred tax asset for an net operating loss (“NOL”) carryforward, a similar tax loss, or a tax credit carryforward except when: (1) An NOL carryforward, a similar tax loss, or a tax credit carryforward is not available as of the reporting date under the governing tax law to settle taxes that would result from the disallowance of the tax position; or (2) the entity does not intend to use the deferred tax asset for this purpose (provided that the tax law permits a choice). If either of these conditions exists, an entity should present an unrecognized tax benefit in the financial statements as a liability and should not net the unrecognized tax benefit with a deferred tax asset. The amendments in this ASU are effective for fiscal years, and interim periods within those years, beginning after December 15, 2013. The amendments should be applied prospectively to all unrecognized tax benefits that exist at the effective date. Retrospective application is permitted. The Company does not expect this ASU to have any impact on its consolidated financial statements.

In July 2013, the FASB issued ASU 2013-10, Inclusion of the Fed Funds Effective Swap Rate (or Overnight Index Swap Rate) as a Benchmark Interest Rate for Hedge Accounting Purposes (ASU 2013-10). The amendments in ASU 2013-10 permit an entity to designate Fed Funds Effective Swap Rate, also referred to as the overnight index swap rate, as a benchmark interest rate for hedge accounting purposes. In addition, the amendment removes the restriction on using different benchmark interest rates for similar hedges. The amendment is applicable to all entities that elect to apply hedge accounting of the benchmark interest rate under ASC815. The amendment is effective immediately. This amendment did not have any impact on the Company’s consolidated financial statements.

In February 2013, the FASB issued guidance for reporting of amounts reclassified out of accumulated other comprehensive income. The revised guidance requires reporting the effect of significant reclassifications out of accumulated other comprehensive income on the respective line items in net income if the amount being reclassified is required to be reclassified in its entirety to net income. For other amounts that are not required to be reclassified in their entirety to net income in the same reporting period, an entity is required to cross-reference other disclosures that provide additional detail about these amounts. The amendments do not change the current requirements for reporting net income or other comprehensive income in financial statements. The guidance was effective prospectively for reporting periods beginning after December 15, 2012. Early adoption was permitted. The adoption of this guidance did not have any impact on the Company’s consolidated financial statements.

In December 2011, the FASB issued ASU No. 2011-11, Balance Sheet (Topic 210): Disclosures about Offsetting Assets and Liabilities (ASU No. 2011-11). ASU No. 2011-11 requires an entity to disclose information about offsetting and related arrangements to enable users of its financial statements to understand the effect of those arrangements on its financial position. An entity is required to apply ASU No. 2011-11 for annual reporting periods beginning on or after January 1, 2013, and interim periods within those annual periods. An entity should provide the disclosures required by ASU No. 2011-11 retrospectively for all comparative periods presented. The adoption of ASU No. 2011-11 did not have any impact on the Company’s consolidated financial statements.

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Income Taxes - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Income Tax [Line Items]
Provision for income taxes	$ (5,284)	$ 718	$ (5,828)	$ (95)
Effective tax rate			12.00%
Additional paid-in capital	999
Minimum [Member] | Scenario, Forecast [Member]
Income Tax [Line Items]
Expected provision for income taxes for the tax deductible goodwill and foreign taxes resulting from guaranteed profits			3,200
Maximum [Member] | Scenario, Forecast [Member]
Income Tax [Line Items]
Expected provision for income taxes for the tax deductible goodwill and foreign taxes resulting from guaranteed profits			$ 3,400

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Stockholders' Equity - Weighted Average Assumptions Used to Estimate Fair Value of Stock Options (Detail)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Equity [Abstract]
Risk-free interest rate	1.80%	1.80%
Vesting term, in years	2 years 2 months 19 days	2 years 2 months 19 days
Expected annual volatility	75.00%	78.00%
Expected dividend yield
Exit rate pre-vesting	7.70%	8.00%
Exit rate post-vesting	14.06%	14.06%

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Description of Business and Basis of Presentation - Percentage of Total Revenues (Detail)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Operating Statistics [Line Items]
Percentage of total revenues	100.00%	100.00%	100.00%	100.00%
United States [Member]
Operating Statistics [Line Items]
Percentage of total revenues	81.00%	88.00%	81.00%	88.00%
Australia [Member]
Operating Statistics [Line Items]
Percentage of total revenues	16.00%	10.00%	14.00%	7.00%
All Other [Member]
Operating Statistics [Line Items]
Percentage of total revenues	3.00%	2.00%	5.00%	5.00%

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Description of Business and Basis of Presentation - Additional Information (Detail) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended		12 Months Ended	3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended				3 Months Ended		9 Months Ended			3 Months Ended		9 Months Ended
	Sep. 30, 2013 USD ($)	Sep. 30, 2012 USD ($)	Sep. 30, 2013 USD ($)	Sep. 30, 2012 USD ($)	Dec. 31, 2012 USD ($)	Sep. 30, 2013 International Customers [Member] USD ($)	Sep. 30, 2012 International Customers [Member] USD ($)	Sep. 30, 2013 International Customers [Member] USD ($)	Sep. 30, 2012 International Customers [Member] USD ($)	Sep. 30, 2013 Australian Subsidiary [Member] USD ($)	Sep. 30, 2013 Australian Subsidiary [Member] AUD	Sep. 30, 2013 Australian Subsidiary [Member] USD ($)	Sep. 30, 2013 Australian Subsidiary [Member] AUD	Sep. 30, 2012 Australian Subsidiary [Member] USD ($)	Sep. 30, 2012 Australian Subsidiary [Member] AUD	Sep. 30, 2013 Software Development Costs [Member] USD ($)	Sep. 30, 2012 Software Development Costs [Member] USD ($)	Sep. 30, 2013 Software Development Costs [Member] USD ($)	Sep. 30, 2012 Software Development Costs [Member] USD ($)	Dec. 31, 2012 Software Development Costs [Member] USD ($)	Sep. 30, 2013 Demand Response Equipment [Member] USD ($)	Sep. 30, 2012 Demand Response Equipment [Member] USD ($)	Sep. 30, 2013 Demand Response Equipment [Member] USD ($)	Sep. 30, 2012 Demand Response Equipment [Member] USD ($)
Reclassifications [Line Items]
Accounts receivable and deferred revenues					$ 8,042
(Losses) gains arising from transactions denominated in foreign currencies	167	580	(1,156)	1,168
Inter company receivables from subsidiary										333	375	12,142	11,796	17,468	16,400
Realized gain (loss) from inter company receivables										54		402		494
Intercompany receivables										16,587	17,802	16,587	17,802
Intercompany funding deemed as long-term investment										18,975	20,364	18,975	20,364
Translation adjustments	55	172	(987)	314						377		2,150
Capitalized software development costs																1,523	1,203	5,835	3,497
Amortization of capitalized internal use software																1,434	1,185	4,186	3,364
Accumulated amortization of capitalized internal use software																19,895		19,895		15,709
Impairment charges of property and equipment																					264	98	503	441
Revenues based upon customer location	$ 278,473	$ 177,947	$ 347,476	$ 235,670		$ 52,908	$ 21,899	$ 66,952	$ 28,250

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Stockholders' Equity - Summary of Company's Restricted Stock Unit Activity (Detail) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested Shares, Beginning balance			2,135,496
Granted, Number of Shares			1,491,269
Vested, Number of Shares			(833,521)
Cancelled, Number of Shares			(395,382)
Nonvested Shares, Ending balance	2,397,862		2,397,862
Nonvested, Weighted Average Grant Date Fair Value Per Share, Beginning balance			$ 9.78
Granted, Weighted Average Grant Date Fair Value Per Share			$ 16.47
Vested, Weighted Average Grant Date Fair Value Per Share			$ 11.06
Cancelled, Weighted Average Grant Date Fair Value Per Share			$ 11.36
Nonvested, Weighted Average Grant Date Fair Value Per Share, Ending balance	$ 13.27		$ 13.27
Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested Shares, Beginning balance			106,478
Granted, Number of Shares
Vested, Number of Shares		(6,728)	(56,603)	(85,312)
Cancelled, Number of Shares			(15,625)
Nonvested Shares, Ending balance	34,250		34,250
Nonvested, Weighted Average Grant Date Fair Value Per Share, Beginning balance			$ 27.88
Granted, Weighted Average Grant Date Fair Value Per Share
Vested, Weighted Average Grant Date Fair Value Per Share			$ 27.01
Cancelled, Weighted Average Grant Date Fair Value Per Share			$ 29.48
Nonvested, Weighted Average Grant Date Fair Value Per Share, Ending balance	$ 28.59		$ 28.59

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Fair Value Measurements - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Parenthetical) (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Fair Value Disclosures [Abstract]
Time value of money before increase in fair value	$ 88	$ 98
Increase in fair value of liabilities	$ 40

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Stockholders' Equity - Stock-Based Compensation (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation	$ 3,821	$ 3,341	$ 11,832	$ 10,018
Selling and Marketing Expenses [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation	1,426	1,182	4,272	3,428
General and Administrative Expenses [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation	2,049	1,908	6,521	5,712
Research and Development Expenses [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation	$ 346	$ 251	$ 1,039	$ 878

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Concentrations of Credit Risk - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012
Concentration Risk [Line Items]
Percentage of revenues threshold to determine major customer status	10.00%		10.00%
Deposits held by customers	$ 224	$ 1,888
Accounts Receivable [Member]
Concentration Risk [Line Items]
Share in accounts receivable from major customers	10.00%	10.00%
PJM [Member]
Concentration Risk [Line Items]
Unbilled revenue	117,972	44,926
PJM [Member] | Accounts Receivable [Member]
Concentration Risk [Line Items]
Share in accounts receivable from major customers		12.00%
Other Customers [Member]
Concentration Risk [Line Items]
Unbilled revenue	$ 0	$ 0
Southern California Edison Company [Member] | Accounts Receivable [Member]
Concentration Risk [Line Items]
Share in accounts receivable from major customers	17.00%	14.00%
IMO [Member] | Accounts Receivable [Member]
Concentration Risk [Line Items]
Share in accounts receivable from major customers	14.00%
Electric [Member] | Accounts Receivable [Member]
Concentration Risk [Line Items]
Share in accounts receivable from major customers	13.00%
Electric Utilities Corporation (PPL) [Member] | Accounts Receivable [Member]
Concentration Risk [Line Items]
Share in accounts receivable from major customers		10.00%

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Net Income Per Share - Reconciliation of Basic and Diluted Share Amounts (Detail)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Basic weighted average common shares outstanding	27,920,409	26,653,252	27,693,054	26,470,634
Weighted average common stock equivalents	923,000	673,000	924,000	599,000
Diluted weighted average common shares outstanding	28,843,010	27,325,949	28,616,552	27,069,569
Stock Options [Member]
Weighted average anti-dilutive shares related to:
Weighted average anti-dilutive shares			1,000	1,000
Nonvested Restricted Shares [Member]
Weighted average anti-dilutive shares related to:
Weighted average anti-dilutive shares	54,000	354,000	336,000	632,000
Restricted Stock Units [Member]
Weighted average anti-dilutive shares related to:
Weighted average anti-dilutive shares		154,000	9,000	225,000

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Stockholders' Equity - Stock Options Activity Additional Information (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Equity [Abstract]
Total number of options granted during the period	500	5,100	4,000	10,550
Weighted-average fair value per share of options granted	$ 8.68	$ 6.15	$ 10.15	$ 5.37
Total intrinsic value of options exercised	$ 239	$ 209	$ 1,290	$ 1,139

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Concentrations of Credit Risk (Tables)

9 Months Ended

Sep. 30, 2013

Risks And Uncertainties [Abstract]

Concentrations of Credit Risk of Significant Customers

No other customer comprised more than 10% of consolidated revenues during the three or nine month periods ended September 30, 2013 and 2012, respectively.

	Three Months Ended September 30,
	2013					2012
	Revenues		% of Total Revenues			Revenues		% of Total Revenues
PJM	$	171,377		62	%	$	108,294		61	%
IMO	$	45,708		16	%	$	17,440		10	%

	Nine Months Ended September 30,
	2013					2012
	Revenues		% of Total Revenues			Revenues		% of Total Revenues
PJM	$	173,252		50	%	$	109,657		47	%
IMO	$	45,708		13	%	$	17,440		7	%

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Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Cash flows from operating activities
Net income	$ 41,969	$ 3,499
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	15,356	13,414
Amortization of acquired intangible assets	5,260	5,438
Stock based compensation expense	11,832	10,018
Excess tax benefit related to exercise of options, restricted stock and restricted stock units	(999)
Impairment of equipment	503	441
Unrealized foreign exchange transaction loss (gain)	2,108	(781)
Deferred taxes	2,157
Non-cash interest expense	234	306
Accretion of fair value of deferred and contingent purchase price consideration related to acquisitions	88	98
Other, net	29	142
Changes in operating assets and liabilities, net of effects of acquisitions:
Accounts receivable, trade	(26,643)	(29,801)
Unbilled revenue	(73,308)	(11,574)
Prepaid expenses and other current assets	(2,757)	1,583
Capitalized incremental direct customer contract costs	8,377	(1,209)
Other assets	(113)	189
Other noncurrent liabilities	6,884	625
Deferred revenue	(6,677)	13,122
Accrued capacity payments	47,941	11,092
Accrued payroll and related expenses	(1,103)	(434)
Accounts payable, accrued performance adjustments and accrued expenses and other current liabilities	2,321	(3,302)
Net cash provided by operating activities	33,459	12,866
Cash flows from investing activities
Purchases of property and equipment	(32,925)	(11,752)
Change in restricted cash and deposits	(179)	4,716
Change in long-term assets		(111)
Payment made for acquisition of customer contract	(699)
Net cash used in investing activities	(33,803)	(7,147)
Cash flows from financing activities
Proceeds from exercises of stock options	1,369	141
Payments made for buy back of common stock	(5,000)
Excess tax benefit related to exercise of options, restricted stock and restricted stock units	999
Net cash (used in) provided by financing activities	(2,632)	141
Effects of exchange rate changes on cash and cash equivalents	(835)	11
Net change in cash and cash equivalents	(3,811)	5,871
Cash and cash equivalents at beginning of period	115,041	87,297
Cash and cash equivalents at end of period	111,230	93,168
Non-cash financing and investing activities
Issuance of common stock in satisfaction of bonuses	$ 154	$ 350

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Intangible Assets and Goodwill

9 Months Ended

Sep. 30, 2013

Goodwill And Intangible Assets Disclosure [Abstract]

Intangible Assets and Goodwill

2. Intangible Assets and Goodwill

Definite-Lived Intangible Assets

The following table provides the gross carrying amount and related accumulated amortization of intangible assets as of September 30, 2013 and December 31, 2012:

			As of September 30, 2013					As of December 31, 2012
	Weighted Average Amortization Period (in years)		Gross Carrying Amount		Accumulated Amortization			Gross Carrying Amount		Accumulated Amortization
Customer relationships		3.29	$	30,589		(14,406	)	$	32,667	$	(10,958	)
Customer contracts		3.41	$	4,917	$	(2,730	)	$	4,218	$	(2,420	)
Employment agreements and non- compete agreements		0.47		1,717		(1,394	)		1,728		(1,115	)
Software		—		120		(120	)		120		(120	)
Developed Technology		1.06		2,283		(1,611	)		2,300		(1,161	)
Trade name		0.38		575		(426	)		575		(340	)
Patents		6.40		180		(63	)		180		(50	)
Total other definite-lived intangible assets				9,792		(6,344	)		9,121		(5,206	)
Total			$	40,381	$	(20,750	)	$	41,788	$	(16,164	)

The change in the Company’s customer contracts intangible assets from December 31, 2012 to September 30, 2013 was primarily due to the acquisition of a single intangible asset during the three month period ended September 30, 2013 representing the acquisition of a three year contractual obligation for the delivery of additional demand response capacity in the Western Australia market commencing on October 1, 2013 for a purchase price of $699. The acquisition of this single intangible asset did not meet the definition of a business, as defined in ASC 805, Business Combinations, due to the fact neither processes nor the additional inputs required to combine with this intangible asset in order to be capable of producing outputs were acquired. Therefore, the acquisition of this intangible asset was accounted for as an asset acquisition based on the principles described in ASC 850-50 and the entire purchase price, which was less than the estimated fair value, was allocated to this intangible asset. This intangible asset is being amortized to cost of revenues based on the expected pattern of economic benefit over the applicable contractual period. The decrease in other intangible assets from December 31, 2012 to September 30, 2013, excluding the acquisition of the customer contract, was due to foreign currency translation adjustments

Amortization expense related to intangible assets amounted to $1,703 and $1,808 for the three month periods ended September 30, 2013 and 2012, respectively, and $5,260 and $5,438 for the nine month periods ended September 30, 2013 and 2012, respectively. Amortization expense for developed technology, which was $138 and $161 for the three month periods ended September 30, 2013 and 2012, respectively, and $416 and $483 for the nine month periods ended September 30, 2013 and 2012, respectively, is included in cost of revenues in the accompanying unaudited condensed consolidated statements of income. Amortization expense for all other intangible assets is included as a component of operating expenses in the accompanying unaudited condensed consolidated statements of income. The intangible asset lives range from one to ten years and the weighted average remaining life was 3.0 years at September 30, 2013. Estimated amortization is expected to be $1,870, $6,557, $4,567, $3,922 and $2,715 for the three month period ending December 31, 2013, and years ending 2014, 2015, 2016 and 2017, respectively.

Goodwill

In accordance with ASC 350, Intangibles—Goodwill and Other, the Company tests goodwill at the reporting unit level for impairment on an annual basis and between annual tests if events and circumstances indicate it is more likely than not that the fair value of a reporting unit is less than its carrying value. The Company’s annual impairment test date is November 30. The Company has determined that it currently has two reporting units: (1) the consolidated Australian operations, which represents the Company’s Australia and New Zealand operations, and (2) all other operations. During the three month period ended September 30, 2013, there were no potential impairment indicators identified that required an interim impairment test of goodwill. The Company’s market capitalization as of September 30, 2013 exceeded the book value of its consolidated net assets by more than 100%. In addition, as of November 30, 2012 the fair value of both the Company’s consolidated Australian reporting unit and the Company’s all other operations reporting unit exceeded each of their respective carrying values by more than 50%.

The following table shows the change of the carrying amount of goodwill from December 31, 2012 to September 30, 2013:

Balance at December 31, 2012	$	79,505
Foreign currency translation		(1,394	)
Balance at September 30, 2013	$	78,111

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Fair Value Measurements

9 Months Ended

Sep. 30, 2013

Fair Value Disclosures [Abstract]

Fair Value Measurements

5. Fair Value Measurements

The tables below present the balances of assets and liabilities measured at fair value on a recurring basis at September 30, 2013 and December 31, 2012:

	Fair Value Measurement at September 30, 2013 Using
	Totals		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Unobservable Inputs (Level 3)
Assets:
Money markets (1)	$	98,128	$	98,128	$	—	$	—
Liabilities:
Deferred acquisition consideration (2)	$	558	$	—	$	—	$	558
Accrued acquisition contingent consideration (2)		446		—		—		446
	$	1,004	$	—	$	—	$	1,004

(1) Included in cash and cash equivalents in the accompanying unaudited condensed consolidated balance sheets. Increase in investments [in money market funds] from December 31, 2012 is due to an overnight enterprise investment sweep from the Company’s main operating account which was implemented in July 2013.

(2) Deferred acquisition consideration and accrued acquisition contingent consideration, which are liabilities and were the result of the Company’s acquisition of M2M and Energy Response, respectively, represent the only assets or liabilities that the Company measured and recorded at fair value on a recurring basis using significant unobservable inputs (Level 3). The aggregate increase in fair value of liabilities for the nine month period ended September 30, 2013 of $40 was due to the increase in the liabilities as a result of the amortization of the applicable discounts related to the time value of money of $88 and changes in exchange rates. There were no changes to the probability or timing of payment during the nine month period ended September 30, 2013.

	Fair Value Measurement at December 31, 2012 Using
	Totals		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Unobservable Inputs (Level 3)
Liabilities:
Deferred acquisition consideration (1)	$	533	$	—	$	—	$	533
Accrued acquisition contingent consideration (1)		431		—		—		431
	$	964	$	—	$	—	$	964

(1) Deferred acquisition consideration and accrued acquisition contingent consideration, which are liabilities that were the result of the Company’s acquisition of M2M and Energy Response, respectively, represented the only assets or liabilities that the Company measured and recorded at fair value on a recurring basis using significant unobservable inputs (Level 3).

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Net Income Per Share

9 Months Ended

Sep. 30, 2013

Earnings Per Share [Abstract]

Net Income Per Share

3. Net Income Per Share

A reconciliation of basic and diluted share amounts for the three and nine month periods ended September 30, 2013 and 2012 are as follows (shares in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
Basic weighted average common shares outstanding		27,920		26,653		27,693		26,471
Weighted average common stock equivalents		923		673		924		599
Diluted weighted average common shares outstanding		28,843		27,326		28,617		27,070
Weighted average anti-dilutive shares related to:
Stock options		—		—		1		1
Nonvested restricted shares		54		354		336		632
Restricted stock units		—		154		9		225

In reporting periods in which the Company reports net income, anti-dilutive shares consist of those common stock equivalents that have either an exercise price above the average stock price for the period or the common stock equivalents’ related average unrecognized stock compensation expense is sufficient to “buy back” the entire amount of shares. In those reporting periods in which the Company has a net loss, anti-dilutive shares consist of the impact of those number of shares that would have been dilutive had the Company had net income plus the number of common stock equivalents that would have been anti-dilutive had the Company had net income.

The Company excludes the shares issued in connection with restricted stock awards from the calculation of basic weighted average common shares outstanding until such time as those shares vest. In addition, with respect to restricted stock awards that vest based on achievement of performance conditions, because performance conditions are considered contingencies under ASC 260, Earnings per Share, the criteria for contingent shares must first be applied before determining the dilutive effect of these types of share-based payments. Prior to the end of the contingency period (i.e., before the performance conditions have been satisfied), the number of contingently issuable common shares to be included in diluted weighted average common shares outstanding should be based on the number of common shares, if any, that would be issuable under the terms of the arrangement if the end of the reporting period were the end of the contingency period (e.g., the number of shares that would be issuable based on current performance criteria) assuming the result would be dilutive.

In connection with certain of the Company’s business combinations, the Company issued common shares that were held in escrow upon closing of the applicable business combination. The Company excludes shares held in escrow from the calculation of basic weighted average common shares outstanding where the release of such shares is contingent upon an event and not solely subject to the passage of time. The 254,654 shares related to a component of the deferred purchase price consideration from the acquisition of M2M Communications Corporation (M2M), which are not subject to adjustment as the issuance of such shares is not subject to any contingency, are included in both the basic and diluted weighted average common shares outstanding.

In January 2013, the Company released 46,506 shares of common stock held in escrow related to the Energy Response acquisition in accordance with the provisions within the relevant escrow agreement.

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Stockholders' Equity - Summary of Company's Stock Option Activity (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Equity [Abstract]
Number of Shares Underlying Options Outstanding, Beginning of period			1,275,311
Number of Shares Underlying Options, Granted	500	5,100	4,000	10,550
Number of Shares Underlying Options, Exercised			(163,332)
Number of Shares Underlying Options, Cancelled			(36,388)
Number of Shares Underlying Options Outstanding, End of period	1,079,591		1,079,591		1,275,311
Number of Shares Underlying Options, Exercisable at end of period	1,006,039		1,006,039
Number of Shares Underlying Options, Vested or expected to vest at June 30, 2013	1,075,506		1,075,506
Exercise Price Per Share Minimum, Beginning of period			$ 0.17		$ 0.17
Exercise Price Per Share Minimum, End of period			$ 0.17		$ 0.17
Exercise Price Per Share Maximum, Beginning of period			$ 48.06		$ 48.06
Exercise Price Per Share Maximum, End of period			$ 48.06		$ 48.06
Exercise Price Per Share Minimum, Exercisable at end of period			$ 0.17
Exercise Price Per Share Maximum, Exercisable at end of period			$ 48.06
Exercise Price Per Share Minimum, Vested or expected to vest at March 31, 2013			$ 0.17
Exercise Price Per Share Maximum, Vested or expected to vest at March 31, 2013			$ 48.06
Weighted-Average Exercise Price Per Share, Beginning of period			$ 16.26
Weighted-Average Exercise Price Per Share, Granted			$ 16.34
Weighted-Average Exercise Price Per Share, Exercised			$ 8.39
Weighted-Average Exercise Price Per Share, Cancelled			$ 22.41
Weighted-Average Exercise Price Per Share, End of period	$ 17.24		$ 17.24		$ 16.26
Weighted-Average Exercise Price Per Share, Exercisable at end of period	$ 16.68		$ 16.68
Weighted-Average Exercise Price Per Share, Vested or expected to vest at September 30, 2013	$ 17.24		$ 17.24
Aggregate Intrinsic Value, Beginning of period			$ 2,915
Aggregate Intrinsic Value, Granted
Aggregate Intrinsic Value, Exercised	239	209	1,290	1,139
Aggregate Intrinsic Value, Cancelled
Aggregate Intrinsic Value, End of period	4,107		4,107		2,915
Aggregate Intrinsic Value, Exercisable at end of period	4,061		4,061
Aggregate Intrinsic Value, Vested or expected to vest at March 31, 2013	$ 4,101		$ 4,101

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Intangible Assets and Goodwill - Summary of Gross Carrying Amount and Related Accumulated Amortization of Definite-Lived Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Dec. 31, 2012
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period (in years)	3 years
Gross Carrying Amount	$ 40,381	$ 41,788
Accumulated Amortization	(20,750)	(16,164)
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period (in years)	3 years 3 months 15 days
Gross Carrying Amount	30,589	32,667
Accumulated Amortization	(14,406)	(10,958)
Customer Contracts [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period (in years)	3 years 4 months 28 days
Gross Carrying Amount	4,917	4,218
Accumulated Amortization	(2,730)	(2,420)
Employment Agreements and Non-compete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period (in years)	5 months 19 days
Gross Carrying Amount	1,717	1,728
Accumulated Amortization	(1,394)	(1,115)
Software [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period (in years)
Gross Carrying Amount	120	120
Accumulated Amortization	(120)	(120)
Developed Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period (in years)	1 year 22 days
Gross Carrying Amount	2,283	2,300
Accumulated Amortization	(1,611)	(1,161)
Trade Name [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period (in years)	4 months 17 days
Gross Carrying Amount	575	575
Accumulated Amortization	(426)	(340)
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period (in years)	6 years 4 months 24 days
Gross Carrying Amount	180	180
Accumulated Amortization	(63)	(50)
Total Other Definite-Lived Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	9,792	9,121
Accumulated Amortization	$ (6,344)	$ (5,206)

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Net Income Per Share - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2013
Energy Response [Member]
Business Acquisition [Line Items]
Number of common stock, shares released from escrow	46,506
M2M Communications Corporation [Member]
Business Acquisition [Line Items]
Shares to be issued related to deferred consideration arrangement related to a business combination	254,654

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Stockholders' Equity - Additional Information (Detail) (USD $)	1 Months Ended		3 Months Ended			9 Months Ended		3 Months Ended		9 Months Ended				6 Months Ended		3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended		3 Months Ended	9 Months Ended		9 Months Ended
	Aug. 06, 2013	May 28, 2013	Sep. 30, 2013	Mar. 31, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013 Restricted Stock [Member]	Sep. 30, 2012 Restricted Stock [Member]	Sep. 30, 2013 Restricted Stock [Member]	Sep. 30, 2012 Restricted Stock [Member]	Sep. 30, 2013 Restricted Stock Units [Member]	Sep. 30, 2013 Executive Vice President [Member]	Jun. 30, 2013 Executive Vice President [Member] Restricted Stock [Member]	Jun. 30, 2013 Executive Vice President [Member] Restricted Stock Units [Member]	Sep. 30, 2013 Chief Accounting Officer [Member]	Sep. 30, 2013 Chief Accounting Officer [Member]	Sep. 03, 2013 Advisors [Member] Restricted Stock [Member]	Sep. 30, 2013 Advisors [Member] Restricted Stock [Member]	Sep. 30, 2013 Advisors [Member] Restricted Stock [Member] Ratably Vesting [Member]	Sep. 03, 2013 Advisors [Member] Restricted Stock [Member] Tranche [Member]	Sep. 30, 2013 Management [Member] Restricted Stock [Member]	Sep. 30, 2013 Plan 2007 [Member]	Sep. 30, 2013 Restricted Stock and Restricted Stock Units [Member]	Sep. 30, 2013 Restricted Stock Performance-based Vesting Awards Probable Vesting [Member]	Sep. 30, 2013 Restricted Stock Performance-based Vesting Awards not Probable Vesting [Member]
Stockholders Equity [Line Items]
Authorized repurchase of common stock	$ 30,000,000
Total repurchase of common stock			330,843
Total cost of common stock			5,000,000
weighted-average purchase price			$ 15.11
Common stock issued to executives						8,920	44,871
Annual increase to shares available for issuance under share-based compensation plan per accordance with provisions of such share-based compensation plan				Equal to the lesser of 520,000 shares
Current fiscal year increase to shares available for issuance under share-based compensation plan per accordance with provisions of such share-based compensation plan				520,000
Remaining shares available for issuance under share-based compensation plan through the end of the expiration of such share-based compensation plan based on the amended shared-based compensation plan		2,500,000
Shares available under future grant under 2007 plan																							2,750,078
Dividends paid to common stock						0
Forfeited restricted stock unit						395,382						15,625		159,028	12,500
Reversed stock-based compensation expense													476,000			70,000	70,000
Material income tax benefit from share-based compensation			999,000		0	999,000	0
Material compensation cost capitalized			0			0
Stock options outstanding held by employees			1,071,098			1,071,098
Stock options outstanding held by non-employees			8,493			8,493
Nonvested stock-based compensation expense related to employees			647,000			647,000																		15,923,000	5,528,000	96,000
Weighted average period of stock options						10 months 24 days																		3 years	1 year 8 months 12 days
Vesting period restricted stock Restricted stock awards and Restricted stock unit awards						4 years																3 years
Restricted stock granted to non-executive employees			26,353			26,353
Restricted stock granted to board of directors								30,740		30,740
Restricted stock granted to non employees						1,491,269		80,703	212,950	1,491,269	1,513,828							11,000	33,000	22,000	11,000
Stock-based compensation expense related to share-based award			3,821,000		3,341,000	11,832,000	10,018,000	37,000		52,000
Fair value of share-based award								$ 493,000		$ 493,000
Non-vested restricted stock																						480,000
Percentage of shares vest in 2014, based on operating result																						25.00%
Remaining nonvested restricted shares vested																						75.00%
Nonvested restricted shares forfeited based on operating results not achieved																						100.00%

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Concentrations of Credit Risk - Concentrations of Credit Risk of Significant Customers (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Concentration Risk [Line Items]
Revenues	$ 278,473	$ 177,947	$ 347,476	$ 235,670
PJM [Member]
Concentration Risk [Line Items]
Revenues	171,377	108,294	173,252	109,657
% of Total Revenues	62.00%	61.00%	50.00%	47.00%
IMO [Member]
Concentration Risk [Line Items]
Revenues	$ 45,708	$ 17,440	$ 45,708	$ 17,440
% of Total Revenues	16.00%	10.00%	13.00%	7.00%

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Stockholders' Equity - Additional Information about Restricted Stock (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total number of shares of restricted stock granted during the period			1,491,269
Weighted average fair value per share of restricted stock granted			$ 16.47
Total number of shares of restricted stock vested during the period			833,521
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total number of shares of restricted stock granted during the period	80,703	212,950	1,491,269	1,513,828
Weighted average fair value per share of restricted stock granted	$ 13.53	$ 10.72	$ 16.47	$ 7.87
Total number of shares of restricted stock vested during the period	138,282	50,174	833,521	244,513
Total fair value of shares of restricted stock vested during the period	$ 2,024	$ 423	$ 13,359	$ 2,103

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Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Statement Of Financial Position [Abstract]
Allowance for doubtful accounts receivable	$ 479	$ 487
Accumulated depreciation	$ 76,853	$ 67,909
Undesignated preferred stock, par value	$ 0.001	$ 0.001
Undesignated preferred stock, shares authorized	5,000,000	5,000,000
Undesignated preferred stock, shares issued	0	0
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	30,013,822	29,019,923
Common stock, shares outstanding	30,013,822	29,019,923

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Stockholders' Equity

9 Months Ended

Sep. 30, 2013

Text Block [Abstract]

Stockholders' Equity

8. Stockholders’ Equity

Share Repurchase Program

On August 6, 2013, the Company’s Board of Directors authorized the repurchase of up to $30,000 of the Company’s common stock during the period from August 6, 2013 through August 6, 2014, unless earlier terminated by the Board of Directors. During the three month period ended September 30, 2013, the Company repurchased 330,843 shares of the Company’s common stock at a weighted-average purchase price of $15.11 per share for a total cost of $5,000. All shares were retired upon repurchase.

Stock Based Compensation

During the nine month periods ended September 30, 2013 and 2012, the Company issued 8,920 shares and 44,871 shares of its common stock, respectively, to certain executives to satisfy a portion of the Company’s bonus obligation to these individuals. Historically, the Company’s Amended and Restated 2007 Employee, Director and Consultant Stock Plan (the 2007 Plan) contained an “evergreen” provision, which provided for an annual increase to the shares issuable under the 2007 Plan by an amount equal to the lesser of 520,000 shares or an amount determined by the Company’s board of directors. The annual increase to the 2007 Plan of 520,000 shares occurred during the three month period ended March 31, 2013. On May 28, 2013, the Company’s shareholders approved an amendment and restatement of the 2007 Plan to, among other things, increase the number of shares of common stock authorized for issuance under the 2007 Plan by 2,500,000 shares and eliminate the evergreen provision. As of September 30, 2013, 2,750,078 shares were available for future grant under the 2007 Plan, as amended and restated.

Stock Options

The fair value of options granted was estimated at the date of grant using the following weighted average assumptions:

	Nine Months Ended September 30,
	2013			2012
Risk-free interest rate		1.8	%		1.8	%
Vesting term, in years		2.22			2.22
Expected annual volatility		75	%		78	%
Expected dividend yield		—	%		—	%
Exit rate pre-vesting		7.7	%		8.0	%
Exit rate post-vesting		14.06	%		14.06	%

The risk-free interest rate is the rate available as of the option date on zero-coupon United States government issues with a term equal to the expected life of the option. Volatility measures the amount that a stock price has fluctuated or is expected to fluctuate during a period. The Company calculates volatility using a component of implied volatility and historical volatility to determine the value of share-based payments. The Company has not paid dividends on its common stock in the past and does not plan to pay any dividends in the foreseeable future. In addition, the terms of the 2013 credit facility preclude the Company from paying dividends. During the three month period ended September 30, 2013, the Company updated its estimated pre-vesting and post-vesting exit rates applied to options, restricted stock and restricted stock units based on an evaluation of demographics of its employee groups and historical forfeitures for these groups in order to determine its option valuations as well as its stock-based compensation expense noting no change in the exit-rate post vesting and no material changes in the expected annual volatility or exit rate pre-vesting. The changes in estimates of the volatility and exit rate pre-vesting did not have a material impact on the Company’s stock-based compensation expense recorded in the accompanying unaudited condensed consolidated statements of income for the three and nine month periods ended September 30, 2013.

In June 2013, in connection with the departure of the Company’s former Executive Vice President, certain unvested share-based payments were forfeited. This individual forfeited 159,028 shares of restricted common stock and 12,500 restricted stock units. As a result, during the nine month period ended September 30, 2013, the Company reversed approximately $476 of stock-based compensation expense that had been recognized in prior periods related to the portion of these unvested share-based payments that had been previously expected to vest.

In August 2013, in connection with the Company’s Chief Accounting Officer providing notice of his resignation, certain unvested share-based payments that were previously deemed probable of vesting became improbable of vesting. As a result, during the three and nine month periods ended September 30, 2013, the Company reversed approximately $70 of stock-based compensation expense that had been recognized in prior periods related to the portion of these unvested share-based payments that had been previously expected to vest.

The components of stock based compensation expense are disclosed below:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
Stock options	$	333	$	471	$	1,081	$	1,584
Restricted stock and restricted stock units		3,488		2,870		10,751		8,434
Total	$	3,821	$	3,341	$	11,832	$	10,018

Stock based compensation is recorded in the accompanying unaudited condensed consolidated statements of income, as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
Selling and marketing expenses	$	1,426	$	1,182	$	4,272	$	3,428
General and administrative expenses		2,049		1,908		6,521		5,712
Research and development expenses		346		251		1,039		878
Total	$	3,821	$	3,341	$	11,832	$	10,018

The Company recognized an income tax benefit from share-based compensation arrangements of $999 during the three and nine month periods ended September 30, 2013. The Company recognized no material income tax benefit from share-based compensation arrangements during the three and nine month periods ended September 30, 2012. No material compensation cost was capitalized during the three and nine month periods ended September 30, 2013 and 2012.

The following is a summary of the Company’s stock option activity during the nine month period ended September 30, 2013:

	Nine Months Ended September 30, 2013
	Number of Shares Underlying Options			Exercise Price Per Share	Weighted- Average Exercise Price Per Share		Aggregate Intrinsic Value
Outstanding at December 31, 2012		1,275,311		$0.17 - $48.06	$	16.26	$	2,915	(2)
Granted		4,000				16.34
Exercised		(163,332	)			8.39	$	1,290	(3)
Cancelled		(36,388	)			22.41
Outstanding at September 30, 2013		1,079,591		$0.17 - $48.06		17.24	$	4,107	(4)
Weighted average remaining contractual life in years: 3.2
Exercisable at end of period		1,006,039		$0.17 - $48.06	$	16.68	$	4,061	(4)
Weighted average remaining contractual life in years: 3.0
Vested or expected to vest at September 30, 2013 (1)		1,075,506		$0.17 - $48.06	$	17.24	$	4,101	(4)

(1) This represents the number of vested options as of September 30, 2013 plus the number of unvested options expected to vest as of September 30, 2013 based on the unvested options outstanding at September 30, 2013, adjusted for the estimated forfeiture rate of 7.7%.

(2) The aggregate intrinsic value was calculated based on the positive difference between the estimated fair value of the Company’s common stock on December 31, 2012 of $11.75 and the exercise price of the underlying options.

(3) The aggregate intrinsic value was calculated based on the positive difference between the fair value of the Company’s common stock on the applicable exercise dates and the exercise price of the underlying options.

(4) The aggregate intrinsic value was calculated based on the positive difference between the estimated fair value of the Company’s common stock on September 30, 2013 of $14.98 and the exercise price of the underlying options.

Additional Information About Stock Options

	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
	In thousands, except share and per share amounts				In thousands, except share and per share amounts
Total number of options granted during the period		500		5,100		4,000		10,550
Weighted-average fair value per share of options granted	$	8.68	$	6.15	$	10.15	$	5.37
Total intrinsic value of options exercised (1)	$	239	$	209	$	1,290	$	1,139

(1) Represents the difference between the market price at exercise and the price paid to exercise the options.

Of the stock options outstanding as of September 30, 2013, 1,071,098 options were held by employees and directors of the Company and 8,493 options were held by non-employees. For outstanding unvested stock options related to employees and directors of the Company as of September 30, 2013, the Company had $647 of unrecognized stock-based compensation expense, which is expected to be recognized over a weighted average period of 0.9 years. There were no unvested non-employee stock options as of September 30, 2013.

Restricted Stock and Restricted Stock Units

For non-vested restricted stock and restricted stock units subject to service-based vesting conditions outstanding as of September 30, 2013, the Company had $15,923 of unrecognized stock-based compensation expense, which is expected to be recognized over a weighted average period of 3.0 years. For non-vested restricted stock subject to performance-based vesting conditions outstanding that were probable of vesting as of September 30, 2013, the Company had $5,528 of unrecognized stock-based compensation expense, which is expected to be recognized over a weighted average period of 1.7 years. For non-vested restricted stock subject to outstanding performance-based vesting conditions that were not probable of vesting as of September 30, 2013, the Company had $96 of unrecognized stock-based compensation expense. If and when any additional portion of the equity awards are deemed probable to vest, the Company will reflect the effect of the change in estimate in the period of change by recording a cumulative catch-up adjustment to retroactively apply the new estimate.

Restricted Stock

The following table summarizes the Company’s restricted stock activity during the nine month period ended September 30, 2013:

	Number of Shares			Weighted Average Grant Date Fair Value Per Share
Nonvested at December 31, 2012		2,135,496		$	9.78
Granted		1,491,269			16.47
Vested		(833,521	)		11.06
Cancelled		(395,382	)		11.36
Nonvested at September 30, 2013		2,397,862		$	13.27

All shares underlying awards of restricted stock are restricted in that they are not transferable until they vest. Restricted stock typically vests ratably over a four-year period from the date of issuance, with certain exceptions. Included in the above table are 26,353 shares of restricted stock granted to certain non-executive employees and 30,740 shares of restricted stock granted to certain members of the Company’s board of directors during the nine month period ended September 30, 2013 that were immediately vested. Also included in the table above, are shares of restricted stock granted to non-employee advisory board members. During the three and nine month periods ended September 30, 2013, the Company granted 11,000 and 33,000 shares, respectively, of restricted stock to non-employee advisory board members. Of the 33,000 shares of restricted stock granted, 22,000 shares of restricted stock vest ratably on a quarterly basis over four years and 11,000 shares of restricted stock vest in equal annual tranches on July 1, 2014 and July 1, 2015, as long as the individuals continue to serve as advisory board members through the date of the applicable vesting. The Company will account for these share-based awards in accordance with ASC 505-50, Equity Based Payments to Non-Employees, which will result in the Company continuing to re-measure the fair value of the share-based awards until such time as the awards vest. During the three and nine month periods ended September 30, 2013, the Company recorded stock-based compensation expense related to these awards of $37 and $52, respectively. As of September 30, 2013 the awards had a fair value of $493.

The fair value of restricted stock upon which vesting is solely service-based is expensed ratably over the vesting period. With respect to restricted stock where vesting contains certain performance-based vesting conditions, the fair value is expensed based on the accelerated attribution method as prescribed by ASC 718, Stock Compensation, over the vesting period. With the exception of certain executives whose employment agreements provide for continued vesting in certain circumstances upon departure, if the employee who received the restricted stock leaves the Company prior to the vesting date for any reason, the shares of restricted stock will be forfeited and returned to the Company. During the three month period ended September 30, 2013, the Company did not grant any shares of restricted stock that contained performance-based vesting conditions. During the nine month period ended September 30, 2013, the Company granted 480,000 shares of nonvested restricted stock to certain executives that contain performance-based vesting conditions. Of these shares, 25% vest in 2014 if the performance criteria related to certain 2013 operating results are achieved and the executive is still employed as of the vesting date and the remaining 75% of the shares vest quarterly over a three year period thereafter as long as the executive is still employed as of the vesting date. If the performance criteria related to certain 2013 operating results are not achieved, 100% of the shares are forfeited.

Other than the items previously discussed above, during the three and nine month periods ended September 30, 2013, there were no changes to probabilities of vesting of performance-based stock awards which had a material impact on stock-based compensation expense or amounts expected to be recognized.

Additional Information about Restricted Stock

	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
	in thousands, except share and per
	share amounts
Total number of shares of restricted stock granted during the period		80,703		212,950		1,491,269		1,513,828
Weighted average fair value per share of restricted stock granted	$	13.53	$	10.72	$	16.47	$	7.87
Total number of shares of restricted stock vested during the period		138,282		50,174		833,521		244,513
Total fair value of shares of restricted stock vested during the period	$	2,024	$	423	$	13,359	$	2,103

Restricted Stock Units

The following table summarizes the Company’s restricted stock unit activity during the nine month period ended September 30, 2013:

	Number of Shares			Weighted Average Grant Date Fair Value Per Share
Nonvested at December 31, 2012		106,478		$	27.88
Granted		—			—
Vested		(56,603	)		27.01
Cancelled		(15,625	)		29.48
Nonvested at September 30, 2013		34,250		$	28.59

Additional Information about Restricted Stock Units

	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
	in thousands, except share and per share amounts
Total number of shares of restricted stock vested during the period		—		6,728		56,603		85,312
Total fair value of shares of restricted stock vested during the period	$	—	$	61	$	948	$	792

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Condensed Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 106,857	$ 60,348	$ 41,969	$ 3,499
Foreign currency translation adjustments	55	172	(987)	314
Comprehensive income	$ 106,912	$ 60,520	$ 40,982	$ 3,813

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Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Current assets
Cash and cash equivalents	$ 111,230	$ 115,041
Restricted cash	1,363	9
Trade accounts receivable, net of allowance for doubtful accounts of $479 and $487 at September 30, 2013 and December 31, 2012, respectively	61,518	35,208
Unbilled revenue	118,583	45,269
Capitalized incremental direct customer contract costs	3,513	10,226
Deposits	430	2,296
Prepaid expenses and other current assets	6,933	4,640
Total current assets	303,570	212,689
Property and equipment, net of accumulated depreciation of $76,853 and $67,909 at September 30, 2013 and December 31, 2012, respectively	50,062	32,592
Goodwill	78,111	79,505
Customer relationship intangible assets, net	16,183	21,709
Other definite-lived intangible assets, net	3,448	3,915
Capitalized incremental direct customer contract costs, long-term	2,213	3,929
Deposits and other assets	1,483	826
Total assets	455,070	355,165
Current liabilities
Accounts payable	1,709	3,976
Accrued capacity payments	96,507	49,258
Accrued payroll and related expenses	11,675	13,044
Accrued expenses and other current liabilities	11,933	8,978
Accrued performance adjustments	1,720	685
Deferred revenue	17,235	20,063
Total current liabilities	140,779	96,004
Deferred acquisition consideration	558	533
Accrued acquisition contingent consideration	446	431
Deferred tax liability	6,379	4,222
Deferred revenue	7,563	11,837
Other liabilities	8,987	2,116
Commitments and contingencies (Notes 7 and 11)
Stockholders' equity
Undesignated preferred stock, $0.001 par value; 5,000,000 shares authorized; no shares issued
Common stock, $0.001 par value; 50,000,000 shares authorized, 30,013,822 and 29,019,923 shares issued and outstanding at September 30, 2013 and December 31, 2012, respectively	30	29
Additional paid-in capital	353,490	344,137
Accumulated other comprehensive loss	(1,689)	(702)
Accumulated deficit	(61,473)	(103,442)
Total stockholders' equity	290,358	240,022
Total liabilities and stockholders' equity	$ 455,070	$ 355,165

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Intangible Assets and Goodwill - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Nov. 30, 2012
Finite-Lived Intangible Assets [Line Items]
Amortization expenses of intangible assets	$ 1,703	$ 1,808	$ 5,260	$ 5,438
Intangible asset estimated useful life			3 years
Estimated amortization, 2013	1,870		1,870
Estimated amortization, 2014	6,557		6,557
Estimated amortization, 2015	4,567		4,567
Estimated amortization, 2016	3,922		3,922
Estimated amortization, 2017	2,715		2,715
Market capitalization in excess of book value of consolidated net assets, percentage	100.00%		100.00%
Fair Value of Reporting Unit in excess of carrying value percentage					50.00%
Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible asset estimated useful life			1 year
Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible asset estimated useful life			10 years
Customer Contracts [Member]
Finite-Lived Intangible Assets [Line Items]
Acquisition contractual obligation period			3 years
Purchase price			699
Intangible asset estimated useful life			3 years 4 months 28 days
Developed Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization expenses of intangible assets	$ 138	$ 161	$ 416	$ 483

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Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2013

Fair Value Disclosures [Abstract]

Assets and Liabilities Measured at Fair Value on a Recurring Basis

The tables below present the balances of assets and liabilities measured at fair value on a recurring basis at September 30, 2013 and December 31, 2012:

	Fair Value Measurement at September 30, 2013 Using
	Totals		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Unobservable Inputs (Level 3)
Assets:
Money markets (1)	$	98,128	$	98,128	$	—	$	—
Liabilities:
Deferred acquisition consideration (2)	$	558	$	—	$	—	$	558
Accrued acquisition contingent consideration (2)		446		—		—		446
	$	1,004	$	—	$	—	$	1,004

(1) Included in cash and cash equivalents in the accompanying unaudited condensed consolidated balance sheets. Increase in investments [in money market funds] from December 31, 2012 is due to an overnight enterprise investment sweep from the Company’s main operating account which was implemented in July 2013.

(2) Deferred acquisition consideration and accrued acquisition contingent consideration, which are liabilities and were the result of the Company’s acquisition of M2M and Energy Response, respectively, represent the only assets or liabilities that the Company measured and recorded at fair value on a recurring basis using significant unobservable inputs (Level 3). The aggregate increase in fair value of liabilities for the nine month period ended September 30, 2013 of $40 was due to the increase in the liabilities as a result of the amortization of the applicable discounts related to the time value of money of $88 and changes in exchange rates. There were no changes to the probability or timing of payment during the nine month period ended September 30, 2013.

	Fair Value Measurement at December 31, 2012 Using
	Totals		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Unobservable Inputs (Level 3)
Liabilities:
Deferred acquisition consideration (1)	$	533	$	—	$	—	$	533
Accrued acquisition contingent consideration (1)		431		—		—		431
	$	964	$	—	$	—	$	964

(1) Deferred acquisition consideration and accrued acquisition contingent consideration, which are liabilities that were the result of the Company’s acquisition of M2M and Energy Response, respectively, represented the only assets or liabilities that the Company measured and recorded at fair value on a recurring basis using significant unobservable inputs (Level 3).

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Stockholders' Equity - Summary of Company's Restricted Stock Activity (Detail) (USD $)	9 Months Ended
	Sep. 30, 2013
Equity [Abstract]
Nonvested Shares, Beginning balance	2,135,496
Granted, Number of Shares	1,491,269
Vested, Number of Shares	(833,521)
Cancelled, Number of Shares	(395,382)
Nonvested Shares, Ending balance	2,397,862
Nonvested, Weighted Average Grant Date Fair Value Per Share, Beginning balance	$ 9.78
Granted, Weighted Average Grant Date Fair Value Per Share	$ 16.47
Vested, Weighted Average Grant Date Fair Value Per Share	$ 11.06
Cancelled, Weighted Average Grant Date Fair Value Per Share	$ 11.36
Nonvested, Weighted Average Grant Date Fair Value Per Share, Ending balance	$ 13.27

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Stockholders' Equity - Components of Stock-Based Compensation Expense (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 3,821	$ 3,341	$ 11,832	$ 10,018
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	333	471	1,081	1,584
Restricted Stock and Restricted Stock Units Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 3,488	$ 2,870	$ 10,751	$ 8,434

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Financing Arrangements - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended				9 Months Ended	1 Months Ended	9 Months Ended
	Sep. 30, 2013	Jul. 31, 2013 2013 Credit Facility [Member]	Jun. 30, 2013 2013 Credit Facility [Member]	May 31, 2013 2013 Credit Facility [Member]	Sep. 30, 2013 Credit Facility 2013 [Member]	Apr. 18, 2013 Credit Facility 2013 [Member] Silicon Valley Bank [Member]	Sep. 30, 2013 Credit Facility 2013 [Member] Silicon Valley Bank [Member]	Apr. 30, 2013 Credit Facility 2013 [Member] Revolving Credit Facility [Member]	Sep. 30, 2013 Credit Facility 2013 [Member] Minimum [Member]	Sep. 30, 2013 Credit Facility 2013 [Member] Maximum [Member]	Sep. 30, 2013 Swing Lines Loan [Member] Silicon Valley Bank [Member]	Mar. 31, 2012 Credit Facility 2012 [Member] Silicon Valley Bank [Member]
Line of Credit Facility [Line Items]
Borrowing limit						$ 70,000					$ 5,000	$ 50,000
Letter of credit								70,000
Length of credit facility						2 years
Maximum potential borrowing limit						100,000
Credit facility covenant terms	Twelve
Unrestricted cash					70,000				30,000	45,000
Percentage of letter of credit fee-Minimum							2.00%
Interest rate description on term loan							(i) the Eurodollar Rate with respect to the relevant interest period plus 2.00% or (ii) the ABR (defined as the highest of (x) the "prime rate" as quoted in the Wall Street Journal, and (y) the Federal Funds Effective Rate plus 0.50%) plus 1.00%
Interest on Federal Funds	0.50%
Additional interest on Federal Funds	1.00%
Percentage of letter of credit fee					2.00%
2013 Credit facility, termination date	Apr. 18, 2015
Percentage of letter of credit outstanding collateralized by the Company	105.00%
Financing cost incurred by the Company	111				540
Total outstanding letters of credit Issuances of additional letters of credit	49,915			22,700
Amount of letter of credit cancelled		10,000	6,200
Borrowing under letter of credit	0
Issuances of additional letters of credit	$ 20,085

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Commitments and Contingencies - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Contingencies And Commitments [Line Items]
Deferred rent	$ 800		$ 4,919
Asset retirement obligation	403		403
Deferred rent liability	7,871		7,871		1,049
Contingent liability under outstanding letters of credit	49,915		49,915
Restricted cash to secure insurance commitments	1,363		1,363		9
Performance guarantees	51,389		51,389
Deposits held by certain customers	224		224
Restricted cash utilized to collateralize			1,250
Estimated termination penalty	8,729		8,729
Deferred fees	1,020		1,020
Accrued performance adjustments related to fees received	1,720		1,720		685
Revenues	267,479	169,658	318,553	213,586
Period of warranty			One year
Payment due upon termination	1,126		1,126
Contractual Obligations Settlement Transactions[Member]
Contingencies And Commitments [Line Items]
Revenues	$ 3,882		$ 4,717

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Commitments and Contingencies

9 Months Ended

Sep. 30, 2013

Commitments And Contingencies Disclosure [Abstract]

Commitments and Contingencies

7. Commitments and Contingencies

In July 2012, the Company entered into a lease for its new principal executive offices at One Marina Park Drive, Floors 4-6, Boston, Massachusetts (the New Lease). The New Lease term is through July 2020 and the New Lease contains both a rent holiday period and escalating rental payments over the New Lease term. The New Lease requires payments for additional expenses such as taxes, maintenance, and utilities and contains a fair value renewal option. The Company began occupying the space during the second quarter of fiscal 2013. In accordance with the terms of the New Lease, the landlord provided certain lease incentives with respect to the leasehold improvements. In accordance with ASC 840, Leases, the Company recorded the incentives as deferred rent and will reflect these amounts as reductions of lease expense over the lease term. During the three and nine month periods ended September 30, 2013, the Company recorded $800 and $4,919, respectively, as deferred rent related to landlord lease incentives. Although lease payments under this arrangement did not commence until August 2013, as the Company had the right to use and controls physical access to the space, it determined that the lease term commenced in July 2012 and, as a result, began recording rent expense on this lease arrangement at that time on a straight-line basis. The New Lease also contains certain provisions requiring the Company to restore certain aspects of the leased space to its initial condition. The Company has determined that these provisions represent asset retirement obligations and recorded the estimated fair value of these obligations as the related leasehold improvements were incurred. The Company will accrete the liability to fair value over the life of the lease as a component of operating expenses. As of September 30, 2013, the Company recorded an asset retirement obligation of $403. The decrease in asset retirement obligation from June 30, 2013 is due to completion and settlement of restoration activities related to the Company’s former principal executive offices during the three month period ended September 30, 2013.

As of September 30, 2013 and December 31, 2012, the Company had a deferred rent liability representing rent expense recorded on a straight-line basis in excess of contractual lease payments of $7,871and $1,049, respectively, which is included in other liabilities in the accompanying unaudited condensed consolidated balance sheets.

As of September 30, 2013, the Company was contingently liable under outstanding letters of credit for $49,915. As of September 30, 2013 and December 31, 2012, the Company had restricted cash balances of $1,363 and $9. The restricted cash balance as of September 30, 2013 primarily relate to cash utilized to collateralize certain demand response programs. The restricted cash balance as of December 31, 2012 relates to collateral to secure certain insurance commitments.

The Company is subject to performance guarantee requirements under certain utility and electric power grid operator customer contracts and open market bidding program participation rules, which may be secured by cash or letters of credit. Performance guarantees as of September 30, 2013 were $51,389 and included deposits held by certain customers of $224 and certain restricted cash utilized to collateralize certain demand response programs of $1,250 at September 30, 2013. These amounts primarily represent up-front payments required by utility and electric power grid operator customers as a condition of participation in certain demand response programs and to ensure that the Company will deliver its committed capacity amounts in those programs. If the Company fails to meet its minimum committed capacity requirements, a portion or all of the deposits may be forfeited. The Company assessed the probability of default under these customer contracts and open market bidding programs and has determined the likelihood of default and loss of deposits to be remote. In addition, under certain utility and electric power grid operator customer contracts, if the Company does not achieve the required performance guarantee requirements, the customer can terminate the arrangement and the Company would potentially be subject to termination penalties. Under these arrangements, the Company defers all fees received up to the amount of the potential termination penalty until the Company has concluded that it can reliably determine that the potential termination penalty will not be incurred or the termination penalty lapses. As of September 30, 2013, the Company had $1,020 in deferred fees for these arrangements which were included in deferred revenues as of September 30, 2013. As of September 30, 2013, the maximum termination penalty to which the Company could be subject under these arrangements, which the Company has deemed not probable of being incurred, was approximately $8,729.

As of September 30, 2013 and December 31, 2012, the Company accrued in the accompanying unaudited condensed consolidated balance sheets $1,720 and $685, respectively, of performance adjustments related to fees received for its participation in a certain demand response program. The Company believes that it is probable that these performance adjustments will need to be re-paid to the electric power grid operator and since the electric power grid operator has the right to require repayment at any point at its discretion, the amounts have been classified as a current liability.

In 2012, the Company decided to net settle a portion of its future contractual delivery obligations in a certain open market bidding program. As of September 30, 2013, the Company entered into transactions to net settle a significant portion of its future delivery obligations and these transactions have been approved by the customer as of September 30, 2013. As a result, as long as the other criteria for revenue recognition are met, the Company will recognize these fees from the net settlement transactions as revenues as they become due and payable with such fees being recorded as a component of DemandSMART revenues. During the three and nine month periods ended September 30, 2013, the Company recognized revenues of $3,882 and $4,717, respectively, related to these net settlement transactions. During the three and nine month periods ended September 30, 2013, the Company did not incur any material charges or liabilities related to this matter. Furthermore, the Company does not expect that any additional charges or liabilities will be material to the Company’s consolidated results of operations and anticipates that additional charges or liabilities, if any, would be substantially incurred and recorded within the Company’s consolidated results of operations for fiscal 2013.

The Company typically grants customers a limited warranty that guarantees that its hardware will substantially conform to current specifications for one year from the delivery date. Based on the Company’s operating history, the liability associated with product warranties has been determined to be nominal.

In connection with the Company’s agreement for its employee health insurance plan, the Company could be subject to an additional payment if the agreement is terminated. The Company has not elected to terminate this agreement nor does the Company believe that termination is probable for the foreseeable future. As a result, the Company has determined that it is not probable that a loss is likely to occur and no amounts have been accrued related to this potential payment upon termination. As of September 30, 2013, the payment due upon termination would be $1,126.

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Intangible Assets and Goodwill - Schedule of Change in Carrying Amount of Goodwill (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013
Goodwill And Intangible Assets Disclosure [Abstract]
Beginning Balance	$ 79,505
Foreign currency translation	(1,394)
Ending Balance	$ 78,111

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Stockholders' Equity - Summary of Company's Stock Option Activity (Parenthetical) (Detail) (USD $)	9 Months Ended
	Sep. 30, 2013	Dec. 31, 2012
Equity [Abstract]
Weighted average remaining contractual life, Exercisable at end of period	3 years 2 months 12 days
Weighted average remaining contractual life, Vested or expected to vest, Years	3 years
Estimated forfeiture rate	7.70%
Fair value of common stock	$ 14.98	$ 11.75

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Concentrations of Credit Risk

9 Months Ended

Sep. 30, 2013

Risks And Uncertainties [Abstract]

Concentrations of Credit Risk

10. Concentrations of Credit Risk

The following table presents the Company’s significant customers. PJM Interconnection (PJM) is an electric power grid operator customer in the mid-Atlantic region that is comprised of multiple utilities and was formed to control the operation of the regional power system, coordinate the supply of electricity, and establish fair and efficient markets. Independent Market Operator (IMO) is an entity that was established to administer and operate the Western Australia (WA) wholesale electricity market. The main objectives of the IMO are to coordinate the supply of electricity, encourage competition in the market, establish fair and efficient markets, and ensure economic supply of electricity to customers in WA. No other customer comprised more than 10% of consolidated revenues during the three or nine month periods ended September 30, 2013 and 2012, respectively.

	Three Months Ended September 30,
	2013					2012
	Revenues		% of Total Revenues			Revenues		% of Total Revenues
PJM	$	171,377		62	%	$	108,294		61	%
IMO	$	45,708		16	%	$	17,440		10	%

	Nine Months Ended September 30,
	2013					2012
	Revenues		% of Total Revenues			Revenues		% of Total Revenues
PJM	$	173,252		50	%	$	109,657		47	%
IMO	$	45,708		13	%	$	17,440		7	%

Southern California Edison Company, IMO and Pacific Gas and Electric were the only customers that each comprised 10% or more of the Company’s accounts receivable balance at September 30, 2013, representing 17%, 14%, and 13% respectively, of such accounts receivable balance. Southern California Edison Company, PJM and PPL Electric Utilities Corporation were the only customers that each comprised 10% or more of the Company’s accounts receivable balance at December 31, 2012, representing 14%, 12%, and 10%, respectively, of such accounts receivable balance.

Unbilled revenue related to PJM was $117,972 and $44,926 at September 30, 2013 and December 31, 2012, respectively. There was no significant unbilled revenue for any other customers at September 30, 2013 and December 31, 2012.

Deposits consist of funds to secure performance under certain contracts and open market bidding programs with electric power grid operator and utility customers. Deposits held by these customers were $224 and $1,888 at September 30, 2013 and December 31, 2012, respectively.

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Financing Arrangements

9 Months Ended

Sep. 30, 2013

Debt Disclosure [Abstract]

Financing Arrangements

6. Financing Arrangements

In March 2012, the Company and one of its subsidiaries entered into a $50,000 credit facility with Silicon Valley Bank (SVB), which was subsequently amended in June 2012 and April 2013 (the 2012 credit facility). On April 12, 2013, the Company, one its subsidiaries and SVB entered into an amendment to the 2012 credit facility to extend the termination date from April 15, 2013 to April 30, 2013. On April 18, 2013, the Company, one of its subsidiaries and SVB terminated the 2012 credit facility.

On April 18, 2013, the Company entered into a $70,000 senior secured revolving credit facility with the several lenders from time to time party thereto and SVB, as administrative agent, swingline lender, issuing lender, lead arranger and book manager (SVB and together with the other lenders, “the lenders”), which was subsequently amended in August 2013 (the 2013 credit facility). The 2013 credit facility replaced the 2012 credit facility.

The 2013 credit facility provides for a two year revolving line of credit in the aggregate amount of $70,000, subject to increase from time to time up to an aggregate amount of $100,000 with an additional commitment from the lenders or new commitments from new financial institutions. The material changes in the 2013 credit facility’s monthly and quarterly financial covenants as compared to the financial covenants contained in the 2012 credit facility include:

• a change in the Company’s quarterly financial covenant, previously based on specified minimum earnings levels, to one based on specified free cash flow levels. The specified minimum free cash flow financial covenant is based on earnings before depreciation and amortization expense, interest expense and income, provision for income taxes, stock-based compensation expense, certain impairment charges and certain other non-cash charges or unusual gains over a trailing twelve month period less the sum of capital expenditures, cash paid for interest expense and cash paid for income taxes over the same trailing twelve month period;

• a change to the Company’s monthly financial covenant related to maintenance of a minimum specified ratio of current assets to current liabilities, increasing the Company’s required minimum of unrestricted cash from $30,000 to $45,000 for certain periods; and

• inclusion of a borrowing base covenant that limits the amount of borrowings, including letters of credit, under the 2013 credit facility based on a specified calculation. This borrowing base covenant is effective through the required filing date of the Company’s September 30, 2013 unaudited condensed consolidated financial statements with the SEC on Form 10-Q, as well as for any period in which the Company’s unrestricted cash falls below $70,000.

Subject to continued compliance with the covenants contained in the 2013 credit facility, the full amount of the 2013 credit facility may be available for issuances of letters of credit and up to $5,000 may be available for swing line loans. The interest on revolving loans under the 2013 credit facility will accrue, at the Company’s election, at either (i) the Eurodollar Rate with respect to the relevant interest period plus 2.00% per annum or (ii) the ABR (defined as the highest of (x) the “prime rate” as quoted in the Wall Street Journal, and (y) the Federal Funds Effective Rate plus 0.50%) plus 1.00% per annum. The letter of credit fee charged under the 2013 credit facility is consistent with the 2012 credit facility letter of credit fee of 2.00%. The Company expenses the interest and letter of credit fees under the 2013 credit facility, as applicable, in the period incurred. The obligations under the 2013 credit facility are secured by all domestic assets of the Company and several of its domestic subsidiaries. The 2013 credit facility terminates on April 18, 2015 and all amounts outstanding thereunder will become due and payable in full and the Company would be required to collateralize with cash any outstanding letter of credit under the 2013 credit facility up to 105% of the amounts outstanding. The Company incurred financing costs of $111 in connection with the 2012 credit facility, which were deferred and were amortized to interest expense over the term of the 2012 credit facility, or through April 15, 2013. In connection with the 2013 credit facility, the Company incurred financing costs of approximately $540 which have been deferred and are being amortized to interest expense over the term of the 2013 credit facility, or through April 18, 2015.

The 2013 credit facility contains customary terms and conditions for credit facilities of this type, including, among other things, restrictions on the ability of the Company and its subsidiaries to incur additional indebtedness, create liens, enter into transactions with affiliates, transfer assets, make certain acquisitions, pay dividends or make distributions on, or repurchase, the Company’s common stock, consolidate or merge with other entities, or undergo a change in control. In addition and as described above, the Company is required to meet certain monthly and quarterly financial covenants customary for this type of credit facility, including maintaining minimum specified level of free cash flow, a minimum specified unrestricted cash balance and a minimum specified ratio of current assets to current liabilities.

The 2013 credit facility contains customary events of default, including payment defaults, breaches of representations, breaches of affirmative or negative covenants, cross defaults to other material indebtedness, bankruptcy and failure to discharge certain judgments. If a default occurs and is not cured within any applicable cure period or is not waived, SVB may accelerate the Company’s obligations under the 2013 credit facility. If the Company is determined to be in default then any amounts outstanding under the 2013 credit facility would become immediately due and payable and the Company would be required to collateralize with cash any outstanding letters of credit up to 105% of the amounts outstanding.

In May 2013, the Company was required to provide financial assurance in connection with its capacity bid in a certain open market bidding program. The Company provided this financial assurance utilizing a $22,700 letter of credit issued under the 2013 credit facility and a portion of its available unrestricted cash on hand. During the three month period ended June 30, 2013, based on the capacity that the Company cleared in the above open market bidding program and the required post-auction financial assurance requirements, the Company recovered all of its available cash that it had provided as financial assurance prior to the auction and $6,200 of the letter of credit was cancelled. In July 2013, $10,000 of outstanding letters of credit were cancelled as a result of the reduction of post-auction financial assurance requirements related to capacity that the Company cleared in an open market bidding program.

On August 2, 2013, the Company entered into an amendment to the 2013 credit facility. This amendment provided for an increase to the maximum dollar amount of shares of common stock that the Company may repurchase or redeem from its public stockholders without the consent of SVB.

As of September 30, 2013, the Company was in compliance with all of its covenants under the 2013 credit facility. The Company believes that it is reasonably assured that it will comply with the covenants of the 2013 credit facility for the foreseeable future.

As of September 30, 2013, the Company had no borrowings, but had outstanding letters of credit totaling $49,915, under the 2013 credit facility. The increase in the amount of outstanding letters of credit from December 31, 2012 to September 30, 2013 is primarily as a result of additional letters of credit issued as collateral for new demand response arrangements and obligations. As of September 30, 2013, the Company had $20,085 available under the 2013 credit facility for future borrowings or issuances of additional letters of credit.

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Description of Business and Basis of Presentation

9 Months Ended

Sep. 30, 2013

Accounting Policies [Abstract]

Description of Business and Basis of Presentation

1. Description of Business and Basis of Presentation

Description of Business

EnerNOC, Inc. (the Company) was incorporated in Delaware on June 5, 2003. The Company, which operates in a single segment, is a leading provider of energy intelligence software and related solutions. The Company maximizes the full value of energy management for commercial, institutional and industrial end-users of energy, which the Company refers to as its C&I customers, and its electric power grid operator and utility customers by delivering a comprehensive suite of demand-side management services and solutions that reduce real-time demand for electricity, increase energy efficiency, improve energy supply transparency in competitive markets, and mitigate emissions. The Company uses its Network Operations Center (NOC) and comprehensive demand response application, DemandSMART, to remotely manage and reduce electricity consumption across a growing network of C&I customer sites, making demand response capacity available to electric power grid operators and utilities on demand while helping C&I customers achieve energy savings, improved financial results and environmental benefits. To date, the Company has generated revenues primarily from electric power grid operators and utilities that make recurring payments to the Company for managing demand response capacity. The Company shares these recurring payments with its C&I customers in exchange for those C&I customers reducing their power consumption when called upon.

Reclassifications

The Company has reclassified certain amounts in its condensed consolidated balance sheet as of December 31, 2012 resulting in a decrease to both accounts receivable and deferred revenues of $8,042 to properly account for outstanding accounts receivable where the fees had been deferred because they were not fixed or determinable.

Basis of Consolidation

The unaudited condensed consolidated financial statements of the Company include the accounts of its wholly-owned subsidiaries and have been prepared in conformity with accounting principles generally accepted in the United States (GAAP). Intercompany transactions and balances are eliminated upon consolidation.

Subsequent Events Consideration

The Company considers events or transactions that occur after the balance sheet date but prior to the issuance of the financial statements to provide additional evidence relative to certain estimates or to identify matters that require additional disclosure. Subsequent events have been evaluated as required.

There were no material recognizable subsequent events recorded or requiring disclosure in the September 30, 2013 unaudited condensed consolidated financial statements.

Use of Estimates in Preparation of Financial Statements

The accompanying unaudited condensed consolidated financial statements have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission (SEC). Certain information and footnote disclosures normally included in financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to SEC rules and regulations. In the opinion of the Company’s management, the unaudited condensed consolidated financial statements and notes have been prepared on the same basis as the audited consolidated financial statements contained in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2012, and include all adjustments (consisting of normal, recurring adjustments) necessary for the fair presentation of the Company’s financial position at September 30, 2013 and statements of income, statements of comprehensive income and statements of cash flows for the three and nine month periods ended September 30, 2013 and 2012. Operating results for the three and nine month periods ended September 30, 2013 are not necessarily indicative of the results to be expected for any other interim period or the entire fiscal year ending December 31, 2013 (fiscal 2013).

The preparation of these unaudited condensed consolidated financial statements requires the Company to make estimates and judgments that affect the reported amounts of assets, liabilities, revenues and expenses, and related disclosure of contingent assets and liabilities. On an on-going basis, the Company evaluates its estimates, including those related to revenue recognition, allowance for doubtful accounts, valuations and purchase price allocations related to business combinations, fair value of deferred acquisition consideration, fair value of accrued acquisition contingent consideration, expected future cash flows including growth rates, discount rates, terminal values and other assumptions and estimates used to evaluate the recoverability of long-lived assets and goodwill, estimated fair values of intangible assets and goodwill, amortization methods and periods, certain accrued expenses and other related charges, stock-based compensation, contingent liabilities, fair value of asset retirement obligations, tax reserves and recoverability of the Company’s net deferred tax assets and related valuation allowance.

Although the Company regularly assesses these estimates, actual results could differ materially. Changes in estimates are recorded in the period in which they become known. The Company bases its estimates on historical experience and various other assumptions that it believes to be reasonable under the circumstances. Actual results may differ from management’s estimates if these results differ from historical experience or other assumptions prove not to be substantially accurate, even if such assumptions are reasonable when made.

The Company is subject to a number of risks similar to those of other companies of similar and different sizes both inside and outside of its industry, including, but not limited to, rapid technological changes, competition from similar energy management applications, services and products provided by larger companies, customer concentration, government regulations, market or program rule changes, protection of proprietary rights and dependence on key individuals.

Foreign Currency Translation

Foreign currency translation adjustments are recorded as a component of other comprehensive income (loss) and included in accumulated other comprehensive loss within stockholders’ equity. Gains (losses) arising from transactions denominated in foreign currencies and the re-measurement of certain intercompany receivables and payables are included in other income (expense), net in the unaudited condensed consolidated statements of income and were $167 and $580 for the three month periods ended September 30, 2013 and 2012, respectively, and ($1,156) and $1,168 for the nine month periods ended September 30, 2013 and 2012, respectively. Foreign currency exchange (losses) gains resulted primarily from foreign denominated intercompany receivables held by the Company from one of its Australian subsidiaries which mainly resulted from funding provided to complete the acquisition of Energy Response Holdings Pty Ltd (Energy Response) and fluctuations in the Australian dollar exchange rate. During the three and nine month periods ended September 30, 2013, $333 ($375 Australian) and $12,142 ($11,796 Australian), respectively, of the intercompany receivable from the Company’s Australian subsidiary were settled through repayments resulting in a realized loss of $54 and $402, respectively. During the three month period ended September 30, 2012, there was no settlement of the intercompany receivable from the Company’s Australian subsidiary. During the nine month period ended September 30, 2012, $17,468 ($16,400 Australian) of the intercompany receivable from the Company’s Australian subsidiary was settled resulting in a realized gain of $494. During the three month periods ended September 30, 2013 and 2012, there were no other material realized gains (losses) incurred related to transactions denominated in foreign currencies. As of September 30, 2013, the Company’s intercompany receivable balance from its Australian subsidiary that is denominated in Australian dollars and not deemed to be of a “long-term investment” nature totaled $16,587 at September 30, 2013 exchange rates ($17,802 Australian). The increase in the Australian intercompany receivable from June 30, 2013 was due to royalties due to the U.S. parent for services and technology provided by the U.S. parent.

In addition, a portion of the funding provided by the Company to one of its Australian subsidiaries to complete the acquisition of Energy Response was deemed to be of a “long-term investment” nature and therefore, the resulting translation adjustments are being recorded as a component of stockholders’ equity within accumulated other comprehensive loss. As of September 30, 2013, the intercompany funding that is denominated in Australian dollars and deemed to be of a “long-term investment” nature totaled $18,975 at September 30, 2013 exchange rates ($20,364 Australian) and during the three and nine month periods ended September 30, 2013, the Company recorded translation adjustments of $377 and $2,150, respectively, related to this intercompany funding within accumulated other comprehensive loss.

Comprehensive Income

Comprehensive income is defined as the change in equity of a business enterprise during a period resulting from transactions and other events and circumstances from non-owner sources. As of September 30, 2013 and 2012, accumulated other comprehensive loss was comprised solely of cumulative foreign currency translation adjustments. The Company presents its components of other comprehensive income, net of related tax effects, which have not been material to date.

Software Development Costs

Software development costs, including license fees and external consulting costs, of $1,523 and $1,203 for the three month periods ended September 30, 2013 and 2012, respectively, and $5,835 and $3,497 for the nine month periods ended September 30, 2013 and 2012, respectively, have been capitalized in accordance with Accounting Standard Codification (ASC) 350-40 (ASC 350-40), Internal-Use Software. The capitalized amount was included as software in property and equipment at September 30, 2013 and December 31, 2012. Amortization of capitalized internal use software costs was $1,434 and $1,185 for the three month periods ended September 30, 2013 and 2012, respectively, and $4,186 and $3,364 for the nine month periods ended September 30, 2013 and 2012, respectively. Accumulated amortization of capitalized internal use software costs was $19,895 and $15,709 as of September 30, 2013 and December 31, 2012, respectively. The Company anticipates that the amount of software development costs that are capitalized in accordance with ASC 350-40 will increase modestly for the foreseeable future in proportion to overall research and development spending as the Company continues its development and significant enhancement of its DemandSMART, EfficiencySMART and SupplySMART applications.

Impairment of Property and Equipment

During the three and nine month periods ended September 30, 2013, as a result of the removal of certain demand response equipment from service, the Company concluded that there were no expected future direct cash flows associated with this demand response equipment and therefore, an impairment indicator existed. The Company determined that the residual value of this demand response equipment was nominal and as a result, recorded an impairment charge during the three and nine month periods ended September 30, 2013 of $264 and $503, respectively, to reduce the carrying value of such equipment to zero. During the three and nine month periods ended September 30, 2012, the company recognized impairment charges of $98 and $441, respectively.

Industry Segment Information

The Company operates in the major geographic areas noted in the chart below. The “All other” designation includes Canada, New Zealand and the United Kingdom. Revenues are based upon customer location and internationally totaled $52,908 and $21,899 for the three month periods ended September 30, 2013 and 2012, respectively, and totaled $66,952 and $28,250 for the nine month periods ended September 30, 2013 and 2012, respectively.

Revenues by geography as a percentage of total revenues are as follows:

	Three Months Ended September 30,						Nine Months Ended September 30,
	2013			2012			2013			2012
United States		81	%		88	%		81	%		88	%
Australia		16			10			14			7
All other		3			2			5			5
Total		100	%		100	%		100	%		100	%

As of September 30, 2013 and December 31, 2012, the long-lived assets related to the Company’s international subsidiaries were not material to the accompanying unaudited condensed consolidated financial statements taken as a whole.

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Stockholders' Equity - Additional Information about Restricted Stock Units (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total number of shares of restricted stock vested during the period			833,521
Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total number of shares of restricted stock vested during the period		6,728	56,603	85,312
Total fair value of shares of restricted stock vested during the period		$ 61	$ 948	$ 792

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Fair Value Measurements - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Assets:
Money markets	$ 98,128
Liabilities:
Deferred acquisition consideration	558	533
Accrued acquisition contingent consideration	446	431
Fair value disclosure, total	1,004	964
Fair Value Measurement, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Assets:
Money markets	98,128
Liabilities:
Deferred acquisition consideration
Accrued acquisition contingent consideration
Fair value disclosure, total
Fair Value Measurement, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member]
Assets:
Money markets
Liabilities:
Deferred acquisition consideration
Accrued acquisition contingent consideration
Fair value disclosure, total
Fair Value Measurement, Recurring [Member] | Unobservable Inputs (Level 3) [Member]
Assets:
Money markets
Liabilities:
Deferred acquisition consideration	558	533
Accrued acquisition contingent consideration	446	431
Fair value disclosure, total	$ 1,004	$ 964

XML

Description of Business and Basis of Presentation (Policies)

9 Months Ended

Sep. 30, 2013

Accounting Policies [Abstract]

Description of Business

Description of Business

EnerNOC, Inc. (the Company) was incorporated in Delaware on June 5, 2003. The Company, which operates in a single segment, is a leading provider of energy intelligence software and related solutions. The Company maximizes the full value of energy management for commercial, institutional and industrial end-users of energy, which the Company refers to as its C&I customers, and its electric power grid operator and utility customers by delivering a comprehensive suite of demand-side management services and solutions that reduce real-time demand for electricity, increase energy efficiency, improve energy supply transparency in competitive markets, and mitigate emissions. The Company uses its Network Operations Center (NOC) and comprehensive demand response application, DemandSMART, to remotely manage and reduce electricity consumption across a growing network of C&I customer sites, making demand response capacity available to electric power grid operators and utilities on demand while helping C&I customers achieve energy savings, improved financial results and environmental benefits. To date, the Company has generated revenues primarily from electric power grid operators and utilities that make recurring payments to the Company for managing demand response capacity. The Company shares these recurring payments with its C&I customers in exchange for those C&I customers reducing their power consumption when called upon.

Reclassifications

Reclassifications

The Company has reclassified certain amounts in its condensed consolidated balance sheet as of December 31, 2012 resulting in a decrease to both accounts receivable and deferred revenues of $8,042 to properly account for outstanding accounts receivable where the fees had been deferred because they were not fixed or determinable.

Basis of Consolidation

Basis of Consolidation

The unaudited condensed consolidated financial statements of the Company include the accounts of its wholly-owned subsidiaries and have been prepared in conformity with accounting principles generally accepted in the United States (GAAP). Intercompany transactions and balances are eliminated upon consolidation.

Subsequent Events Consideration

Subsequent Events Consideration

The Company considers events or transactions that occur after the balance sheet date but prior to the issuance of the financial statements to provide additional evidence relative to certain estimates or to identify matters that require additional disclosure. Subsequent events have been evaluated as required.

There were no material recognizable subsequent events recorded or requiring disclosure in the September 30, 2013 unaudited condensed consolidated financial statements.

Use of Estimates in Preparation of Financial Statements

Use of Estimates in Preparation of Financial Statements

The accompanying unaudited condensed consolidated financial statements have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission (SEC). Certain information and footnote disclosures normally included in financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to SEC rules and regulations. In the opinion of the Company’s management, the unaudited condensed consolidated financial statements and notes have been prepared on the same basis as the audited consolidated financial statements contained in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2012, and include all adjustments (consisting of normal, recurring adjustments) necessary for the fair presentation of the Company’s financial position at September 30, 2013 and statements of income, statements of comprehensive income and statements of cash flows for the three and nine month periods ended September 30, 2013 and 2012. Operating results for the three and nine month periods ended September 30, 2013 are not necessarily indicative of the results to be expected for any other interim period or the entire fiscal year ending December 31, 2013 (fiscal 2013).

The preparation of these unaudited condensed consolidated financial statements requires the Company to make estimates and judgments that affect the reported amounts of assets, liabilities, revenues and expenses, and related disclosure of contingent assets and liabilities. On an on-going basis, the Company evaluates its estimates, including those related to revenue recognition, allowance for doubtful accounts, valuations and purchase price allocations related to business combinations, fair value of deferred acquisition consideration, fair value of accrued acquisition contingent consideration, expected future cash flows including growth rates, discount rates, terminal values and other assumptions and estimates used to evaluate the recoverability of long-lived assets and goodwill, estimated fair values of intangible assets and goodwill, amortization methods and periods, certain accrued expenses and other related charges, stock-based compensation, contingent liabilities, fair value of asset retirement obligations, tax reserves and recoverability of the Company’s net deferred tax assets and related valuation allowance.

Although the Company regularly assesses these estimates, actual results could differ materially. Changes in estimates are recorded in the period in which they become known. The Company bases its estimates on historical experience and various other assumptions that it believes to be reasonable under the circumstances. Actual results may differ from management’s estimates if these results differ from historical experience or other assumptions prove not to be substantially accurate, even if such assumptions are reasonable when made.

The Company is subject to a number of risks similar to those of other companies of similar and different sizes both inside and outside of its industry, including, but not limited to, rapid technological changes, competition from similar energy management applications, services and products provided by larger companies, customer concentration, government regulations, market or program rule changes, protection of proprietary rights and dependence on key individuals.

Foreign Currency Translation

Foreign Currency Translation

Foreign currency translation adjustments are recorded as a component of other comprehensive income (loss) and included in accumulated other comprehensive loss within stockholders’ equity. Gains (losses) arising from transactions denominated in foreign currencies and the re-measurement of certain intercompany receivables and payables are included in other income (expense), net in the unaudited condensed consolidated statements of income and were $167 and $580 for the three month periods ended September 30, 2013 and 2012, respectively, and ($1,156) and $1,168 for the nine month periods ended September 30, 2013 and 2012, respectively. Foreign currency exchange (losses) gains resulted primarily from foreign denominated intercompany receivables held by the Company from one of its Australian subsidiaries which mainly resulted from funding provided to complete the acquisition of Energy Response Holdings Pty Ltd (Energy Response) and fluctuations in the Australian dollar exchange rate. During the three and nine month periods ended September 30, 2013, $333 ($375 Australian) and $12,142 ($11,796 Australian), respectively, of the intercompany receivable from the Company’s Australian subsidiary were settled through repayments resulting in a realized loss of $54 and $402, respectively. During the three month period ended September 30, 2012, there was no settlement of the intercompany receivable from the Company’s Australian subsidiary. During the nine month period ended September 30, 2012, $17,468 ($16,400 Australian) of the intercompany receivable from the Company’s Australian subsidiary was settled resulting in a realized gain of $494. During the three month periods ended September 30, 2013 and 2012, there were no other material realized gains (losses) incurred related to transactions denominated in foreign currencies. As of September 30, 2013, the Company’s intercompany receivable balance from its Australian subsidiary that is denominated in Australian dollars and not deemed to be of a “long-term investment” nature totaled $16,587 at September 30, 2013 exchange rates ($17,802 Australian). The increase in the Australian intercompany receivable from June 30, 2013 was due to royalties due to the U.S. parent for services and technology provided by the U.S. parent.

In addition, a portion of the funding provided by the Company to one of its Australian subsidiaries to complete the acquisition of Energy Response was deemed to be of a “long-term investment” nature and therefore, the resulting translation adjustments are being recorded as a component of stockholders’ equity within accumulated other comprehensive loss. As of September 30, 2013, the intercompany funding that is denominated in Australian dollars and deemed to be of a “long-term investment” nature totaled $18,975 at September 30, 2013 exchange rates ($20,364 Australian) and during the three and nine month periods ended September 30, 2013, the Company recorded translation adjustments of $377 and $2,150, respectively, related to this intercompany funding within accumulated other comprehensive loss.

Comprehensive Income

Comprehensive Income

Comprehensive income is defined as the change in equity of a business enterprise during a period resulting from transactions and other events and circumstances from non-owner sources. As of September 30, 2013 and 2012, accumulated other comprehensive loss was comprised solely of cumulative foreign currency translation adjustments. The Company presents its components of other comprehensive income, net of related tax effects, which have not been material to date.

Software Development Costs

Software Development Costs

Software development costs, including license fees and external consulting costs, of $1,523 and $1,203 for the three month periods ended September 30, 2013 and 2012, respectively, and $5,835 and $3,497 for the nine month periods ended September 30, 2013 and 2012, respectively, have been capitalized in accordance with Accounting Standard Codification (ASC) 350-40 (ASC 350-40), Internal-Use Software. The capitalized amount was included as software in property and equipment at September 30, 2013 and December 31, 2012. Amortization of capitalized internal use software costs was $1,434 and $1,185 for the three month periods ended September 30, 2013 and 2012, respectively, and $4,186 and $3,364 for the nine month periods ended September 30, 2013 and 2012, respectively. Accumulated amortization of capitalized internal use software costs was $19,895 and $15,709 as of September 30, 2013 and December 31, 2012, respectively. The Company anticipates that the amount of software development costs that are capitalized in accordance with ASC 350-40 will increase modestly for the foreseeable future in proportion to overall research and development spending as the Company continues its development and significant enhancement of its DemandSMART, EfficiencySMART and SupplySMART applications.

Impairment of Property and Equipment

Impairment of Property and Equipment

During the three and nine month periods ended September 30, 2013, as a result of the removal of certain demand response equipment from service, the Company concluded that there were no expected future direct cash flows associated with this demand response equipment and therefore, an impairment indicator existed. The Company determined that the residual value of this demand response equipment was nominal and as a result, recorded an impairment charge during the three and nine month periods ended September 30, 2013 of $264 and $503, respectively, to reduce the carrying value of such equipment to zero. During the three and nine month periods ended September 30, 2012, the company recognized impairment charges of $98 and $441, respectively.

Industry Segment Information

Industry Segment Information

The Company operates in the major geographic areas noted in the chart below. The “All other” designation includes Canada, New Zealand and the United Kingdom. Revenues are based upon customer location and internationally totaled $52,908 and $21,899 for the three month periods ended September 30, 2013 and 2012, respectively, and totaled $66,952 and $28,250 for the nine month periods ended September 30, 2013 and 2012, respectively.

Revenues by geography as a percentage of total revenues are as follows:

	Three Months Ended September 30,						Nine Months Ended September 30,
	2013			2012			2013			2012
United States		81	%		88	%		81	%		88	%
Australia		16			10			14			7
All other		3			2			5			5
Total		100	%		100	%		100	%		100	%

As of September 30, 2013 and December 31, 2012, the long-lived assets related to the Company’s international subsidiaries were not material to the accompanying unaudited condensed consolidated financial statements taken as a whole.

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Income Taxes

9 Months Ended

Sep. 30, 2013

Income Tax Disclosure [Abstract]

Income Taxes

9. Income Taxes

The Company accounts for income taxes in accordance with the liability method of ASC 740, Income Taxes (ASC 740). Deferred tax assets and liabilities are recognized based on the differences between the financial reporting and income tax bases of assets and liabilities using statutory rates. A valuation allowance must be provided against deferred tax assets if, based upon the available evidence, it is more likely than not that some or all of the deferred tax assets will not be realized.

ASC 740 also provides criteria for the recognition, measurement, presentation and disclosures of uncertain tax positions. A tax benefit from an uncertain tax position may be recognized if it is “more likely than not” that the position is sustainable based solely on its technical merits. During the three and nine month periods ended September 30, 2013, there were no material changes in the Company’s uncertain tax positions.

Each interim period is considered an integral part of the annual period and tax expense is measured using an estimated annual effective tax rate. An enterprise is required, at the end of each interim reporting period, to make its best estimate of the effective tax rate for the full fiscal year and use that rate to provide for income taxes on a current year-to-date basis. However, if an enterprise is unable to make a reliable estimate of its annual effective tax rate, the actual effective tax rate for the year-to-date period may be the best estimate of the annual effective tax rate. For the six months ended June 30, 2013, the Company had determined that it was able to reliably estimate the annual effective tax rate on its foreign earnings, but was unable to reliably estimate its annual effective tax rate on its U.S. earnings due to unusual sensitivity to the rate as it relates to its forecasted fiscal 2013 U.S. loss. As a result, the Company recorded a provision for income taxes during the six month period ended June 30, 2013 comprised of a tax benefit on its foreign loss plus a U.S. tax expense related to tax deductible goodwill that generates a deferred tax liability that cannot be used as a source of income against which deferred tax assets may be realized.

For the nine months ended September 30, 2013, the Company determined that it was able to reliably estimate its worldwide annual effective tax rate due to the resolution of certain matters that previously resulted in significant volatility in both the Company’s forecasted fiscal 2013 U.S. ordinary income and its U.S. effective tax rate, and applied this estimated worldwide annual effective tax rate to its year-to-date income. For the nine months ended September 30, 2013, the Company recorded a provision for income taxes of $5,828, which represents an approximate effective tax rate of 12%. During the three months ended September 30, 2013, due to limitations on the use of net operating losses in certain states, the Company utilized income tax deductions related to the exercise of stock options and vesting of shares of restricted stock and recorded a benefit of $999 directly to additional paid-in capital.

The Company expects to record a benefit from income taxes for the three month period ended December 31, 2013. For fiscal 2013, the Company expects to record a provision for income taxes of approximately $3,200 to $3,400 for the tax deductible goodwill, certain state income taxes and foreign taxes resulting from guaranteed profits, which will result in a benefit from income taxes during the three month period ending December 31, 2013.

The Company reviews all available evidence to evaluate the recovery of deferred tax assets, including the recent history of losses in all tax jurisdictions, as well as its ability to generate income in future periods. As of September 30, 2013, due to the uncertainty related to the ultimate use of the Company’s deferred income tax assets, the Company has provided a valuation allowance on all of its U.S., Australia and New Zealand deferred tax assets.

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Net Income Per Share (Tables)

9 Months Ended

Sep. 30, 2013

Earnings Per Share [Abstract]

Reconciliation of Basic and Diluted Share Amounts

A reconciliation of basic and diluted share amounts for the three and nine month periods ended September 30, 2013 and 2012 are as follows (shares in thousands):

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2013		2012		2013		2012
Basic weighted average common shares outstanding		27,920		26,653		27,693		26,471
Weighted average common stock equivalents		923		673		924		599
Diluted weighted average common shares outstanding		28,843		27,326		28,617		27,070
Weighted average anti-dilutive shares related to:
Stock options		—		—		1		1
Nonvested restricted shares		54		354		336		632
Restricted stock units		—		154		9		225

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Description of Business and Basis of Presentation (Tables)

9 Months Ended

Sep. 30, 2013

Accounting Policies [Abstract]

Percentage of Total Revenues

Revenues by geography as a percentage of total revenues are as follows:

	Three Months Ended September 30,						Nine Months Ended September 30,
	2013			2012			2013			2012
United States		81	%		88	%		81	%		88	%
Australia		16			10			14			7
All other		3			2			5			5
Total		100	%		100	%		100	%		100	%

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Document and Entity Information	9 Months Ended
	Sep. 30, 2013	Nov. 01, 2013
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2013
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q3
Entity Registrant Name	ENERNOC INC
Entity Central Index Key	0001244937
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		30,093,235

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Intangible Assets and Goodwill (Tables)

9 Months Ended

Sep. 30, 2013

Goodwill And Intangible Assets Disclosure [Abstract]

Summary of Gross Carrying Amount and Related Accumulated Amortization of Definite-Lived Intangible Assets

The following table provides the gross carrying amount and related accumulated amortization of intangible assets as of September 30, 2013 and December 31, 2012:

			As of September 30, 2013					As of December 31, 2012
	Weighted Average Amortization Period (in years)		Gross Carrying Amount		Accumulated Amortization			Gross Carrying Amount		Accumulated Amortization
Customer relationships		3.29	$	30,589		(14,406	)	$	32,667	$	(10,958	)
Customer contracts		3.41	$	4,917	$	(2,730	)	$	4,218	$	(2,420	)
Employment agreements and non- compete agreements		0.47		1,717		(1,394	)		1,728		(1,115	)
Software		—		120		(120	)		120		(120	)
Developed Technology		1.06		2,283		(1,611	)		2,300		(1,161	)
Trade name		0.38		575		(426	)		575		(340	)
Patents		6.40		180		(63	)		180		(50	)
Total other definite-lived intangible assets				9,792		(6,344	)		9,121		(5,206	)
Total			$	40,381	$	(20,750	)	$	41,788	$	(16,164	)

Schedule of Change in Carrying Amount of Goodwill

The following table shows the change of the carrying amount of goodwill from December 31, 2012 to September 30, 2013:

Balance at December 31, 2012	$	79,505
Foreign currency translation		(1,394	)
Balance at September 30, 2013	$	78,111