10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q

(Mark One)

☑	QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
	For the quarterly period ended June 30, 2014
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: 001-34112

Energy Recovery, Inc.

(Exact name of registrant as specified in its charter)

Delaware	01-0616867
(State or other jurisdiction of incorporation)	(IRS Employer Identification No.)
1717 Doolittle Drive, San Leandro, CA	94577
(Address of Principal Executive Offices)	(Zip Code)

(510) 483-7370

(Registrant’s Telephone Number, including area code)

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

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§ 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 ☑ 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	☑
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 Exchange Act Rule 12b-2).  Yes ☐ No ☑

As of August 1, 2014, there were 52,008,259 shares of the registrant’s common stock outstanding.

1

ENERGY RECOVERY, INC.

QUARTERLY REPORT ON FORM 10-Q FOR THE PERIOD ENDED JUNE 30, 2014

TABLE OF CONTENTS

		Page No.
	PART I.     FINANCIAL INFORMATION
Item 1.	Financial Statements (unaudited)
	Condensed Consolidated Balance Sheets as of June 30, 2014 and December 31, 2013	3
	Condensed Consolidated Statements of Operations for the Three and Six Months Ended June 30, 2014 and 2013	4
	Condensed Consolidated Statements of Comprehensive Loss for the Three and Six Months Ended June 30, 2014 and 2013	5
	Condensed Consolidated Statements of Cash Flows for the Six Months Ended June 30, 2014 and 2013	6
	Notes to Condensed Consolidated Financial Statements	7
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	17
Item 3.	Quantitative and Qualitative Disclosures about Market Risk	27
Item 4.	Controls and Procedures	28
	PART II.     OTHER INFORMATION
Item 1.	Legal Proceedings	28
Item 1A.	Risk Factors	28
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	28
Item 6.	Exhibits	29
	Signatures	30

2

PART I — FINANCIAL INFORMATION

Item 1. Financial Statements (unaudited)

ENERGY RECOVERY, INC.

CONDENSED CONSOLIDATED BALANCE SHEETS

(in thousands, except share data and par value)

(unaudited)

	June 30, 2014			December 31, 2013
ASSETS
Current assets:
Cash and cash equivalents	$	16,447		$	14,371
Restricted cash		6,077			4,311
Short-term investments		10,421			5,856
Accounts receivable, net of allowance for doubtful accounts of $247and $241 at June 30, 2014 and December 31, 2013, respectively		9,372			15,222
Unbilled receivables		1,358			5,442
Inventories		9,595			4,955
Deferred tax assets, net		698			698
Prepaid expenses and other current assets		1,232			1,018
Total current assets		55,200			51,873
Restricted cash, non-current		2,894			4,468
Unbilled receivables, non-current		—			1,197
Long-term investments		4,844			13,694
Property and equipment, net of accumulated depreciation of $13,651 and $12,082 at June 30, 2014 and December 31, 2013, respectively		14,475			13,903
Goodwill		12,790			12,790
Other intangible assets, net		3,577			4,008
Other assets, non-current		2			2
Total assets	$	93,782		$	101,935
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current liabilities:
Accounts payable	$	1,801		$	1,209
Accrued expenses and other current liabilities		5,610			7,963
Income taxes payable		27			22
Accrued warranty reserve		705			709
Deferred revenue		1,031			779
Total current liabilities		9,174			10,682
Deferred tax liabilities, non-current, net		2,242			2,131
Deferred revenue, non-current		31			130
Other non-current liabilities		1,925			2,077
Total liabilities		13,372			15,020
Commitments and Contingencies (Note 9)
Stockholders’ equity:
Preferred stock, $0.001 par value; 10,000,000 shares authorized; no shares issued or outstanding		—			—
Common stock, $0.001 par value; 200,000,000 shares authorized; 53,595,051 and 51,697,148 shares issued and outstanding at June 30, 2014, respectively; and 53,136,704 and 51,354,101 shares issued and outstanding at December 31, 2013, respectively		54			53
Additional paid-in capital		122,289			119,932
Accumulated other comprehensive loss		(43	)		(107	)
Treasury stock, at cost, 1,897,903 and 1,782,603 shares repurchased at June 30, 2014 and December 31, 2013, respectively		(4,633	)		(4,000	)
Accumulated deficit		(37,257	)		(28,963	)
Total stockholders’ equity		80,410			86,915
Total liabilities and stockholders’ equity	$	93,782		$	101,935

See Accompanying Notes to Unaudited Condensed Consolidated Financial Statements

3

ENERGY RECOVERY, INC.

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(in thousands, except per share data)

(unaudited)

	Three Months Ended June 30,						Six Months Ended June 30,
	2014			2013			2014			2013
Net revenue	$	6,407		$	8,569		$	10,304		$	14,942
Cost of revenue		3,332			3,293			4,984			6,649
Gross profit		3,075			5,276			5,320			8,293
Operating expenses:
General and administrative		2,995			3,326			5,034			7,496
Sales and marketing		2,702			1,859			5,197			3,870
Research and development		1,724			1,137			2,958			2,219
Amortization of intangibles assets		215			231			430			461
Restructuring charges		—			44			—			44
Total operating expenses		7,636			6,597			13,619			14,090
Loss from operations		(4,561	)		(1,321	)		(8,299	)		(5,797	)
Other non-operating income, net of expenses		8			25			129			52
Loss before income taxes		(4,553	)		(1,296	)		(8,170	)		(5,745	)
Provision for income taxes		58			161			124			222
Net loss	$	(4,611	)	$	(1,457	)	$	(8,294	)	$	(5,967	)
Basic and diluted net loss per share	$	(0.09	)	$	(0.03	)	$	(0.16	)	$	(0.12	)
Shares used in basic and diluted per share calculation		51,566			51,026			51,506			51,004

See Accompanying Notes to Unaudited Condensed Consolidated Financial Statements

4

ENERGY RECOVERY, INC.

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS

(in thousands)

(unaudited)

	Three Months Ended June 30,						Six Months Ended June 30,
	2014			2013			2014			2013
Net loss	$	(4,611	)	$	(1,457	)	$	(8,294	)	$	(5,967	)
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments		3			(3	)		46			2
Unrealized gain (loss) on investments		16			(24	)		18			(35	)
Other comprehensive income (loss)		19			(27	)		64			(33	)
Comprehensive loss	$	(4,592	)	$	(1,484	)	$	(8,230	)	$	(6,000	)

See Accompanying Notes to Unaudited Condensed Consolidated Financial Statements

5

ENERGY RECOVERY, INC.

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(in thousands)

(unaudited)

	Six Months Ended June 30,
	2014			2013
Cash Flows From Operating Activities
Net loss	$	(8,294	)	$	(5,967	)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization		1,998			1,829
Loss on disposal of fixed assets		—			19
Non-cash restructuring charges		—			44
Amortization of premiums/discounts on investments		239			171
Share-based compensation		1,215			1,187
Loss on foreign currency transactions		41			31
Deferred income taxes		111			111
Provision for doubtful accounts		126			134
Provision for warranty claims		48			138
Valuation adjustments for excess or obsolete inventory		43			(60	)
Other non-cash adjustments		(153	)		(58	)
Changes in operating assets and liabilities:
Accounts receivable		5,724			2,629
Unbilled receivables		5,281			3,591
Inventories		(4,683	)		(2,253	)
Prepaid and other assets		(213	)		41
Accounts payable		610			(781	)
Accrued expenses and other liabilities		(2,443	)		(3,190	)
Income taxes payable		4			10
Deferred revenue		153			(230	)
Net cash used in operating activities		(193	)		(2,604	)
Cash Flows From Investing Activities
Capital expenditures		(2,140	)		(866	)
Purchase of marketable securities		—			(8,570	)
Maturities of marketable securities		4,065			6,450
Restricted cash		(192	)		119
Net cash provided by (used in) investing activities		1,733			(2,867	)
Cash Flows From Financing Activities
Repayment of capital lease obligation		—			(18	)
Net proceeds from issuance of common stock		1,138			230
Repurchase of common stock for treasury		(633	)		—
Net cash provided by financing activities		505			212
Effect of exchange rate differences on cash and cash equivalents		31			(33	)
Net change in cash and cash equivalents		2,076			(5,292	)
Cash and cash equivalents, beginning of period		14,371			16,642
Cash and cash equivalents, end of period	$	16,447		$	11,350

See Accompanying Notes to Unaudited Condensed Consolidated Financial Statements

6

ENERGY RECOVERY, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(unaudited)

Note 1 — The Company and Summary of Significant Accounting Policies

The Company

Energy Recovery, Inc. (the “Company”, “Energy Recovery”, “we”, “our”, or “us”) designs, develops, manufactures, and sells energy recovery devices that transform untapped energy into reusable energy from industrial fluid flows and pressure cycles. Our products are marketed and sold in fluid flow markets, such as desalination and oil and gas, under the trademarks ERI^®, PX^®, Pressure Exchanger^®, PX Pressure Exchanger^®, IsoBoost^™, IsoGen^™, and IsoPro^™. Our products are developed and manufactured in the United States of America (“U.S.”) at our headquarters in San Leandro, California. We also have sales offices in Madrid, Spain; Dubai, United Arab Emirates; and Shanghai, Peoples Republic of China.

Use of Estimates

The preparation of condensed consolidated financial statements in conformity with U.S. generally accepted accounting principles (“U.S. GAAP”) requires our management to make judgments, assumptions, and estimates that affect the amounts reported in the condensed consolidated financial statements and accompanying notes. Our more significant estimates and judgments that we believe are the most critical to aid in fully understanding and evaluating our reported financial results are revenue recognition; allowance for doubtful accounts; allowance for product warranty; valuation of stock options; valuation and impairment of goodwill, long-lived assets, and acquired intangible assets; useful lives for depreciation and amortization; valuation adjustments for excess and obsolete inventory; deferred taxes and valuation allowances on deferred tax assets; and evaluation and measurement of contingencies, including contingent consideration. Actual results could differ materially from those estimates.

Basis of Presentation

The condensed consolidated financial statements include the accounts of Energy Recovery, Inc. and its wholly-owned subsidiaries. All significant intercompany accounts and transactions have been eliminated.

The accompanying condensed consolidated financial statements have been prepared by us, without audit, 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 U.S. GAAP have been condensed or omitted pursuant to such rules and regulations. The December 31, 2013 condensed consolidated balance sheet was derived from audited financial statements, and may not include all disclosures required by U.S. GAAP; however, we believe that the disclosures are adequate to make the information presented not misleading. These unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and the notes thereto for the fiscal year ended December 31, 2013 included in our Annual Report on Form 10-K filed with the SEC on March 11, 2014.

In the opinion of management, all adjustments, consisting of only normal recurring adjustments that are necessary to present fairly the financial position, results of operations, and cash flows for the interim periods, have been made. The results of operations for the interim periods are not necessarily indicative of the operating results for the full fiscal year or any future periods.

Change in Method of Accounting for Inventory Valuation

Prior to January 1, 2014, inventories were stated at the lower of cost (using the weighted average cost method) or market. Effective January 1, 2014, with the final implementation of our new enterprise resource planning (“ERP”) system, we changed our method of accounting for inventories to the first-in, first-out (“FIFO”) method. We believe that the change is preferable, as the FIFO method better reflects the current value of inventories and provides more accurate matching of manufacturing costs and revenues. Due to the limited capabilities of our former ERP system, we determined that it was impracticable to retrospectively apply the FIFO costing method to prior periods. As such, prior period consolidated financial statements have not been retroactively adjusted. The cumulative effect of this change was not material.

Recent Accounting Pronouncements

On May 28, 2014, the Financial Accounting Standards Board issued Accounting Standards Update (“ASU”) 2014-09, Revenue from Contracts with Customers. The amendment requires an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. ASU 2014-09 will replace most existing revenue recognition guidance in U.S. GAAP when it becomes effective. ASU 2014-09 is effective for annual reporting periods beginning after December 15, 2016, including interim periods within that reporting period, which is January 1, 2017 for us. Early application is not permitted. ASU 2014-09 permits the use of either the retrospective or cumulative effect transition method. We are evaluating the effect that ASU 2014-09 will have on our consolidated financial statements and related disclosures. We have not yet selected a transition method nor have we determined the effect of the standard on our ongoing financial reporting.

7

Note 2 — Goodwill and Other Intangible Assets

Goodwill as of June 30, 2014 and December 31, 2013 of $12.8 million was the result of our acquisition of Pump Engineering, LLC in December 2009. During the three and six months ended June 30, 2014, there were no changes in the recognized amount of goodwill.

The components of identifiable other intangible assets, all of which are finite-lived, as of the dates indicated were as follows (in thousands):

	June 30, 2014
	Gross Carrying Amount		Accumulated Amortization			Accumulated Impairment Losses			Net Carrying Amount
Developed technology	$	6,100	$	(2,796	)	$	—		$	3,304
Non-compete agreements		1,310		(1,246	)		—			64
Backlog		1,300		(1,300	)		—			—
Trademarks		1,200		(180	)		(1,020	)		—
Customer relationships		990		(960	)		—			30
Patents		585		(364	)		(42	)		179
Total	$	11,485	$	(6,846	)	$	(1,062	)	$	3,577

	December 31, 2013
	Gross Carrying Amount		Accumulated Amortization			Accumulated Impairment Losses			Net Carrying Amount
Developed technology	$	6,100	$	(2,491	)	$	—		$	3,609
Non-compete agreements		1,310		(1,169	)		—			141
Backlog		1,300		(1,300	)		—			—
Trademarks		1,200		(180	)		(1,020	)		—
Customer relationships		990		(924	)		—			66
Patents		585		(351	)		(42	)		192
Total	$	11,485	$	(6,415	)	$	(1,062	)	$	4,008

Accumulated impairment losses at June 30, 2014 include a $1.0 million impairment loss from 2012 for trademarks, a $31,000 loss for patents from 2007, and an $11,000 loss for patents from 2010.

8

Note 3 — Loss per Share

Basic and diluted net loss per share is based on the weighted average number of common shares outstanding during the period. Potential dilutive securities are excluded from the calculation of loss per share, as their inclusion would be anti-dilutive.

The following table shows the computation of basic and diluted loss per share (in thousands, except per share data):

	Three Months Ended June 30,						Six Months Ended June 30,
	2014			2013			2014			2013
Numerator:
Net loss	$	(4,611	)	$	(1,457	)	$	(8,294	)	$	(5,967	)
Denominator:
Basic and diluted weighted average common shares outstanding		51,566			51,026			51,506			51,004
Basic and diluted net loss per share	$	(0.09	)	$	(0.03	)	$	(0.16	)	$	(0.12	)

The following potential common shares were not considered in the computation of diluted loss per share because their effect would have been anti-dilutive (in thousands):

	Three months Ended June 30,				Six months Ended June 30,
	2014		2013		2014		2013
Stock options		7,573		7,273		7,573		7,273
Warrants		600		900		600		900

Note 4 — Other Financial Information

Restricted Cash

We have pledged cash in connection with contingent payments resulting from a business acquisition, stand-by letters of credit, and credit cards. We have deposited corresponding amounts into money market and non-interest bearing accounts at three financial institutions for these items as follows (in thousands):

	June 30, 2014		December 31, 2013
Contingent and other consideration for acquisition	$	2,504	$	2,504
Collateral for stand-by letters of credit		3,258		1,492
Collateral for credit cards		315		315
Current restricted cash	$	6,077	$	4,311
Contingent and other consideration for acquisition	$	1,000	$	1,000
Collateral for stand-by letters of credit		1,894		3,468
Non-current restricted cash	$	2,894	$	4,468
Total restricted cash	$	8,971	$	8,779

Inventories

Our inventories consisted of the following (in thousands):

	June 30, 2014		December 31, 2013
Raw materials	$	3,542	$	2,431
Work in process		2,761		1,427
Finished goods		3,292		1,097
Inventories	$	9,595	$	4,955

Accrued Expenses and Other Current Liabilities

Accrued expenses and other current liabilities consisted of the following (in thousands):

	June 30, 2014		December 31, 2013
Payroll and commissions payable	$	2,877	$	4,857
Contingent consideration (current portion) and legal expenses		1,448		1,603
Other accrued expenses and current liabilities		1,285		1,503
Accrued expenses and other current liabilities	$	5,610	$	7,963

9

Accumulated Other Comprehensive Loss

Changes in accumulated other comprehensive loss by component for the quarter ended June 30, 2014 were as follows (in thousands):

	Foreign Currency Translation Adjustments			Unrealized Gains (Losses) on Investments			Total Accumulated Other Comprehensive Loss
Balance, December 31, 2013	$	(106	)	$	(1	)	$	(107	)
Net other comprehensive income		46			18			64
Balance, June 30, 2014	$	(60	)	$	17		$	(43	)

There were no reclassifications of amounts out of accumulated other comprehensive loss, as there have been no sales of securities or translation adjustments that impacted other comprehensive income during the quarter. The tax impact of the changes in accumulated other comprehensive loss was not material.

Note 5 — Investments

Our short-term and long-term investments are all classified as available-for-sale. There were no sales of available-for-sale securities during the three and six months ended June 30, 2014.

Available-for-sale securities as of the dates indicated consisted of the following (in thousands):

	June 30, 2014
	Amortized Cost		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses			Fair Value
Short-term investments:
State and local government obligations	$	973	$	1	$	—		$	974
Corporate notes and bonds		9,431		18		(2	)		9,447
Total short-term investments	$	10,404	$	19	$	(2	)	$	10,421
Long-term investments:
Corporate notes and bonds	$	4,843	$	5	$	(4	)	$	4,844
Total long-term investments	$	4,843	$	5	$	(4	)	$	4,844
Total available-for-sale securities	$	15,247	$	24	$	(6	)	$	15,265

	December 31, 2013
	Amortized Cost		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses			Fair Value
Short-term investments:
State and local government obligations		2,113		3		—			2,116
Corporate notes and bonds		3,739		2		(1	)		3,740
Total short-term investments	$	5,852	$	5	$	(1	)	$	5,856
Long-term investments:
State and local government obligations		227		1		—			228
Corporate notes and bonds		13,472		11		(17	)		13,466
Total long-term investments	$	13,699	$	12	$	(17	)	$	13,694
Total available-for-sale securities	$	19,551	$	17	$	(18	)	$	19,550

10

Gross unrealized losses and fair values of our investments in an unrealized loss position as of the dates indicated, aggregated by investment category and length of time that the security has been in a continuous loss position, were as follows (in thousands):

	June 30, 2014
	Less than 12 months					12 months or greater					Total
	Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses
Corporate notes and bonds	$	2,074	$	(2	)	$	1,028	$	(4	)	$	3,102	$	(6	)
Total	$	2,074	$	(2	)	$	1,028	$	(4	)	$	3,102	$	(6	)

	December 31, 2013
	Less than 12 months					12 months or greater					Total
	Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses
Corporate notes and bonds	$	4,919	$	(17	)	$	524	$	(1	)	$	5,443	$	(18	)
Total	$	4,919	$	(17	)	$	524	$	(1	)	$	5,443	$	(18	)

Expected maturities can differ from contractual maturities because borrowers may have the right to prepay obligations without prepayment penalties. The amortized cost and fair value of available-for-sale securities that had stated maturities as of June 30, 2014 are shown below by contractual maturity (in thousands):

	June 30,2014
	Amortized Cost		Fair Value
Due in one year or less	$	—	$	—
Due after one year through three years		15,247		15,265
Total available-for-sale securities	$	15,247	$	15,265

Note 6 — Lines of Credit

Lines of Credit

In June 2012, we entered into a loan agreement (the “2012 Agreement”) with a financial institution. The 2012 Agreement provides for a total available credit line of $16.0 million. Under the 2012 Agreement, we are allowed to draw advances not to exceed, at any time, $10.0 million as revolving loans. The total stand-by letters of credit issued under the 2012 Agreement may not exceed the lesser of the $16.0 million credit line or the credit line minus all outstanding revolving loans. At no time may the aggregate of the revolving loans and stand-by letters of credit exceed the total available credit line of $16.0 million. Revolving loans may be in the form of a base rate loan that bears interest equal to the prime rate plus 0% or a Eurodollar loan that bears interest equal to the adjusted LIBOR plus 1.25%. Stand-by letters of credit are subject to customary fees and expenses for issuance or renewal. The unused portion of the credit facility is subject to a facility fee in an amount equal to 0.25% per annum of the average unused portion of the revolving line. The 2012 Agreement also requires us to maintain a cash collateral balance equal to 101% of all outstanding advances and all outstanding stand-by letters of credit collateralized by the line of credit. The 2012 Agreement matures in June 2015 and is collateralized by substantially all of our assets. As of June 30, 2014 and December 31, 2013, there were no advances drawn under the 2012 Agreement. Stand-by letters of credit collateralized under the 2012 Agreement totaled $2.3 million and $1.3 million as of June 30, 2014 and December 31, 2013, respectively. Total cash restricted related to these stand-by letters of credit totaled $2.4 million and $1.3 million as of June 30, 2014 and December 31, 2013, respectively.

We are subject to certain financial and administrative covenants under the 2012 Agreement. As of June 30, 2014, we were in compliance with these covenants.

In 2009, we entered into a loan and security agreement (the “2009 Agreement”) with another financial institution. The 2009 Agreement, as amended, provided a total available credit line of $16.0 million. Under the 2009 Agreement, we were allowed to draw advances of up to $10.0 million on a revolving line of credit or utilize up to $15.9 million as collateral for stand-by letters of credit, provided that the aggregate of the outstanding advances and collateral did not exceed the total available credit line of $16.0 million. Advances under the revolving line of credit incurred interest based on a prime rate index or LIBOR plus 1.375%. The 2009 Agreement, as amended, also required us to maintain cash collateral balances equal to at least 101% of the face amount of all outstanding stand-by letters of credit collateralized by the line of credit and 100% of the amount of all outstanding advances. The 2009 Agreement expired at the end of May 2012, at which time we became required to maintain a cash collateral balance equal to at least 105% of the face amount of all outstanding stand-by letters of credit collateralized by the line of credit. There were no advances drawn under the 2009 Agreement’s credit line at the time it expired. Remaining stand-by letters of credit issued under the 2009 Agreement totaled $2.7 million and $3.6 million as of June 30, 2014 and December 31, 2013, respectively. Total cash restricted related to these stand-by letters of credit totaled $2.8 million and $3.7 million as of June 30, 2014 and December 31, 2013, respectively.

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Note 7 — Equity

Stock Repurchase Program

In February 2014, our Board of Directors authorized a stock repurchase program under which up to three million shares, not to exceed $6.0 million in aggregate cost, of our outstanding common stock could be repurchased through December 31, 2014 at the discretion of management. We account for treasury stock using the cost method. Cost includes fees charged in connection with acquiring the treasury stock. In March 2014, 115,300 shares at an aggregate cost of $633,000 were repurchased under this authorization. There were no repurchases under this authorization during the three months ended June 30, 2014.

Share-Based Compensation Expense

For the three and six months ended June 30, 2014 and 2013, we recognized share-based compensation expense related to employees and consultants as follows (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2014		2013		2014		2013
Cost of revenue	$	26	$	18	$	48	$	39
General and administrative		365		307		694		814
Sales and marketing		155		120		308		235
Research and development		88		53		165		99
Total share-based compensation expense	$	634	$	498	$	1,215	$	1,187

As of June 30, 2014, total unrecognized compensation cost related to non-vested share-based awards, net of estimated forfeitures, was $5.0 million, which is expected to be recognized as expense over a weighted average period of approximately 2.99 years.

In March 2014, we granted 957,000 stock options to certain officers and other employees. The options vest over a four-year period, have an exercise price of $6.00 per share, and expire 10 years from the grant date.

Also, in March 2014, we granted 10,000 stock options to an employee. The options vest over a four-year period, have an exercise price of $5.32 per share, and expire 10 years from the grant date.

In April 2014, we granted 440,000 stock options to our President and Chief Executive Officer in lieu of his participation in the 2014 cash incentive plan. The options vest over a four-year period, have an exercise price of $4.96 per share, and expire 10 years from the grant date.

In June 2014, we granted 50,000 stock options to a certain employee as part of the offer letter of employment. The options vest over a four-year period, have an exercise price of $5.91 per share, and expire 10 years from the grant date.

On July 3, 2014, we granted 100,000 stock options to our new Chief Financial Officer as part of his promotion. The options vest over a four-year period, have an exercise price of $4.91 per share, and expire 10 years from the grant date.

Note 8 — Income Taxes

The effective tax rate for the six months ended June 30, 2014 and 2013 was (1.5%) and (3.9%), respectively. As of December 31, 2013, a valuation allowance of approximately $13.4 million was established to reduce our deferred income tax assets to the amount expected to be realized. As such, no tax benefit related to our pre-tax loss was recognized for the three or six months ended June 30, 2014, as there was no change in our assessment of the amount of deferred income tax assets expected to be realized.

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Note 9 — Commitments and Contingencies

Operating Lease Obligations

We lease facilities under fixed non-cancellable operating leases that expire on various dates through November 2019. Future minimum lease payments consist of the following (in thousands):

	June 30, 2014
2014 (remaining six months)	$	849
2015		1,539
2016		1,575
2017		1,567
2018		1,591
Thereafter		1,398
Total future minimum lease payments	$	8,519

Product Warranty

The following table summarizes the activity related to the product warranty liability during the three and six months ended June 30, 2014 and 2013 (in thousands):

	Three Months Ended June 30,						Six Months Ended June 30,
	2014			2013			2014			2013
Balance, beginning of period	$	705		$	1,256		$	709		$	1,172
Warranty costs charged to cost of revenue		50			41			53			138
Change in estimate		—			(132	)		—			(132	)
Utilization of warranty		(50	)		(138	)		(57	)		(151	)
Balance, end of period	$	705		$	1,027		$	705		$	1,027

Purchase Obligations

We enter into purchase order arrangements with our vendors. As of June 30, 2014, there were open purchase orders for which we had not yet received the related goods or services. These arrangements are subject to change based on our sales demand forecasts, and we have the right to cancel the arrangements prior to the date of delivery. As of June 30, 2014, we had approximately $3.2 million of cancellable open purchase order arrangements related primarily to materials and parts.

Guarantees 

We enter into indemnification provisions under our agreements with other companies in the ordinary course of business, typically with customers. Under these provisions, we generally indemnify and hold harmless the indemnified party for losses suffered or incurred by the indemnified party as a result of our activities, generally limited to personal injury and property damage caused by our employees at a customer’s desalination plant in proportion to the employee’s percentage of fault for the accident. Damages incurred for these indemnifications would be covered by our general liability insurance to the extent provided by the policy limitations. We have not incurred material costs to defend lawsuits or settle claims related to these indemnification agreements. As a result, the estimated fair value of these agreements is not material. Accordingly, we have no liabilities recorded for these agreements as of June 30, 2014 and December 31, 2013.

In certain cases, we issue warranty and product performance guarantees to our customers for amounts ranging from 10% to 30% of the total sales agreement to endorse the execution of product delivery and the warranty of design work, fabrication, and operating performance. These guarantees, generally in the form of stand-by letters of credit or bank guarantees secured by stand-by letters of credit, typically remain in place for periods ranging up to 24 months and in some cases up to 59 months, and relate to the underlying product warranty period. The stand-by letters of credit are collateralized by restricted cash and our credit facility. Of the $5.0 million in outstanding stand-by letters of credit at June 30, 2014, $2.7 million was issued under the 2009 Agreement and $2.3 million was issued under the 2012 Agreement. The stand-by letters of credit outstanding at June 30, 2014 were collateralized by restricted cash of $5.2 million.

13

Litigation

Note 9 – Commitments and Contingencies, under the caption “Litigation” of our Annual Report on Form 10-K filed with the SEC on March 11, 2014, provides information on certain litigation in which we are involved. Unfavorable rulings, judgments, or settlement terms regarding these litigation matters could have a material adverse impact on our business, financial condition, results of operations, and cash flows. Although none of the litigation matters can be quantified with absolute certainty, we have established accruals covering exposure and relating to contingencies to the extent that they are reasonably estimable and probable based on available facts.

On March 28, 2014, in the matter entitled “Roy Radakovich, as representative on behalf of former shareholders of Pump Engineering, LLC v. Energy Recovery, Inc.,” in the U.S. District Court for the Eastern District of Michigan (Southern Division), the Court granted summary judgment in favor of the Company on Claim I of the complaint (achieving certain minimum product energy efficiency metrics ($1.3 million)), but denied summary judgment on Claim II of the complaint (meeting certain product delivery time schedules ($1.2 million)). The Company made a small change in its accrued liability related to this matter to reflect this ruling. The parties are mediating the issues in dispute.

We were a defendant in a lawsuit filed by one of our competitors on October 4, 2013, entitled “Fluid Equipment Development Co., LLC, d/b/a/ FEDCO of Michigan v. Energy Recovery, Inc.” in the U.S. District Court for the Eastern District of Michigan (Southern Division). The complaint alleged, among other things, false advertising under federal and Michigan state statutes based on claims made by us related to certain of our products. The Plaintiffs sought injunctive relief and unspecified damages, attorney’s fees, and litigation costs. On May 20, 2014 the Court dismissed the complaint without prejudice.

Note 10 — Business Segment and Geographic Information

We manufacture and sell high-efficiency energy recovery devices and pumps as well as related services under one reportable segment. Our chief operating decision-maker is the chief executive officer (“CEO”). The CEO reviews financial information presented on a consolidated basis for purposes of making operating decisions and assessing financial performance. Accordingly, we have concluded that we have one reportable segment.

The following geographic information includes net revenue to our domestic and international customers based on the customers’ requested delivery locations, except for certain cases in which the customer directed us to deliver our products to a location that differs from the known ultimate location of use. In such cases, the ultimate location of use, rather than the delivery location, is reflected in the table below (in thousands, except percentages):

	Three Months Ended June 30,						Six Months Ended June 30,
	2014			2013			2014			2013
Domestic revenue	$	235		$	468		$	584		$	1,763
International revenue		6,172			8,101			9,720			13,179
Total revenue	$	6,407		$	8,569		$	10,304		$	14,942
Revenue by country:
Bahamas		14	%		1	%		10	%		*	%
Israel		9			*			10			*
China		11			10			8			7
United States		4			5			6			12
Ghana		*			10			*			6
Spain		2			15			5			10
India		3			15			4			14
Others **		57			44			57			51
Total		100	%		100	%		100	%		100	%

 *Less than 1%

 **Includes remaining countries not separately disclosed. No country in this line item accounted for more than 10% of our net revenue during the periods presented.

All of our long-lived assets were located in the United States at June 30, 2014 and December 31, 2013.

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Note 11 — Concentrations

Customers accounting for 10% or more of our accounts receivable and unbilled receivables were as follows:

	June 30, 2014			December 31, 2013
Customer A		37	%		19	%
Customer B		*			16	%
Customer C		*			17	%
Customer D		*			14	%

*     Less than 10%.

Revenue from customers representing 10% or more of net revenue varies from period to period. For the periods indicated, customers representing 10% or more of net revenue were:

	Three Months Ended June 30,					Six Months Ended June 30,
	2014			2013		2014		2013
Customer E		14	%		*		*		*

*     Less than 10%.

Note 12 — Fair Value Measurements

The authoritative guidance for measuring fair value provides a hierarchy that prioritizes the inputs to valuation techniques used in measuring fair value as follows:

Level 1 — Quoted prices (unadjusted) in active markets for identical assets or liabilities;

Level 2 — Inputs other than quoted prices included within Level 1 that are either directly or indirectly observable; and

Level 3 — Unobservable inputs in which little or no market activity exists, therefore requiring an entity to develop its own assumptions that market participants would use in pricing.

The carrying values of cash and cash equivalents, restricted cash, accounts receivable, unbilled receivables, accounts payable, and other accrued expenses approximate fair value due to the short-term maturity of those instruments. For our investments in available-for-sale securities, if quoted prices in active markets for identical investments are not available to determine fair value (Level 1), then we use quoted prices for similar assets or inputs other than quoted prices that are observable either directly or indirectly (Level 2). The investments included in Level 2 consist primarily of certificates of deposits; commercial paper; and municipal, corporate, and agency obligations. The carrying amount of the contingent consideration arising from our acquisition of Pump Engineering, LLC is measured at fair value on a recurring basis using unobservable inputs in which little or no market activity exists (Level 3). The estimated fair value of the contingent consideration is determined based entirely on management’s assessment of the weighted probability of payment under various scenarios.

The fair value of financial assets and liabilities measured on a recurring basis for the indicated periods was as follows (in thousands):

	June 30, 2014		Level 1 Inputs		Level 2 Inputs		Level 3 Inputs
Assets:
Short-term available-for-sale securities	$	10,421	$	—	$	10,421	$	—
Long-term available-for-sale securities		4,844		—		4,844		—
Total assets	$	15,265	$	—	$	15,265	$	—
Liabilities:
Contingent consideration*	$	1,535	$	—	$	—	$	1,535
Total liabilities	$	1,535	$	—	$	—	$	1,535

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	December 31, 2013		Level 1 Inputs		Level 2 Inputs		Level 3 Inputs
Assets:
Short-term available-for-sale securities	$	5,856	$	—	$	5,856	$	—
Long-term available-for-sale securities		13,694		—		13,694		—
Total assets	$	19,550	$	—	$	19,550	$	—
Liabilities:
Contingent consideration*	$	1,524	$	—	$	—	$	1,524
Total liabilities	$	1,524	$	—	$	—	$	1,524

*     Included in Accrued Expenses and Other Current Liabilities and Other Non-Current Liabilities.

The following table presents quantitative information about the inputs and valuation methodologies used for our fair value measurements classified as Level 3 of the fair value hierarchy as of June 30, 2014:

As of June 30, 2014	Fair Value (in thousands)		Valuation Technique	Significant Unobservable Input	Range
Acquisition-related contingent consideration	$	1,535	Income approach	Probability of outcome	50 – 100%

The reconciliation of the beginning and ending balances for assets and liabilities measured on a recurring basis using significant unobservable inputs (Level 3) for the period ended June 30, 2014 was as follows (in thousands):

	Contingent Consideration
Balance, December 31, 2013	$	1,524
Loss due to change in value		11
Balance, June 30, 2014	$	1,535

Note 13 — Subsequent Events

See Note 7 – “Equity”, for discussion of options granted in July 2014.

On July 29, 2014, warrants to purchase 400,000 shares of common stock were exercised for 311,111 shares in lieu of cash proceeds. The remaining 88,889 warrants were cancelled and considered payment for the exercise.

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

The discussion in this item and in other items of this Form 10-Q contains forward-looking statements within the “safe harbor” provisions of the Private Securities Litigation Reform Act of 1995. Forward-looking statements in this report include, but are not limited to, statements about our expectations, objectives, anticipations, plans, hopes, beliefs, intentions, or strategies regarding the future.

Forward-looking statements that represent our current expectations about future events are based on assumptions and involve risks and uncertainties. If the risks or uncertainties occur or the assumptions prove incorrect, then our results may differ materially from those set forth or implied by the forward-looking statements. Our forward-looking statements are not guarantees of future performance or events.

Words such as “expects,” “anticipates,” “believes,” “estimates,” variations of such words, and similar expressions are also intended to identify such forward-looking statements. These forward-looking statements are subject to risks, uncertainties, and assumptions that are difficult to predict; therefore, actual results may differ materially and adversely from those expressed in any forward-looking statements. Forward-looking statements in this report include, without limitation, statements about the following:

• our belief that recently reported levels of gross profit margin are sustainable to the extent that volume remains healthy, our product mix favors PX devices, and we continue to realize cost savings through production efficiencies and enhanced yields;

• our expectation that our expenses for research and development and sales and marketing will continue to increase as a result of the diversification into markets outside of desalination;

• our expectation that sales outside of the United States will remain a significant portion of our net revenue;

• our belief that our existing cash balances and cash generated from our operations will be sufficient to meet our anticipated liquidity needs for the foreseeable future, with the exception of a decision to enter into an acquisition that could require us to seek additional equity or debt financing; and

• our expectation that, as we expand our international sales, a portion of our revenue could continue to be denominated in foreign currencies.

You should not place undue reliance on these forward-looking statements, which reflect management’s opinions only as of the date of the filing of this Quarterly Report on Form 10-Q. All forward-looking statements included in this document are subject to certain risks and uncertainties, which could cause actual results to differ materially from those projected in the forward-looking statements, as disclosed from time to time in our reports on Forms 10-K, 10-Q, and 8-K as well as in our Annual Reports to Stockholders and, if necessary, updated in “Part II, Item 1A: Risk Factors.” We assume no obligation to update any such forward-looking statements. It is important to note that our actual results could differ materially from the results set forth or implied by our forward-looking statements.

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Overview

We are in the business of designing, developing, and manufacturing energy recovery devices to transform untapped energy into reusable energy from industrial fluid flows and pressure cycles. Our company was founded in 1992, and we introduced the initial version of our Pressure Exchanger^® energy recovery device in early 1997. In December 2009, we acquired Pump Engineering, LLC, which manufactured centrifugal energy recovery devices known as turbochargers as well as high-pressure pumps.

Our energy recovery devices are primarily used in seawater reverse osmosis desalination. Since 2011, we have invested significant research and development costs to expand into other pressurized fluid flow industries such as oil and gas.

Our revenue is principally derived from the sale of our energy recovery devices. We also derive revenue from the sale of our high-pressure and circulation pumps which we manufacture and sell in connection with our energy recovery devices for use in desalination plants. Additionally, we receive revenue from the sale of spare parts and services, including start-up and commissioning services that we provide to our customers. The six months ended June 30, 2014 includes revenue from shipments of energy recovery devices for oil & gas customers pertaining to an operating lease with a customer in Saudi Arabia.

A significant portion of our net revenue typically has been generated from sales to a limited number of large engineering, procurement, and construction, or EPC, firms that are involved with the design and construction of large desalination plants. Sales to these firms often involve a long sales cycle that can range from 6 to 16 months, and in some cases, up to 24 months. A single large desalination project can generate an order for numerous energy recovery devices and generally represents a significant revenue opportunity. We also sell our devices to many small- to medium-sized original equipment manufacturers, or OEMs, which commission smaller desalination plants, order fewer energy recovery devices per plant, and have shorter sales cycles.

In the oil and gas market, we have begun to generate lease revenue from the deployment of an IsoGen™ system in Saudi Arabia. In addition, there are a number of pilot projects to which we have deployed some of our oil and gas devices that have not, as of yet, generated revenue.

We often experience substantial fluctuations in net revenue from quarter to quarter and from year to year due to the fact that a single order for our energy recovery devices by a large EPC firm for a particular plant may represent significant revenue. In addition, historically our EPC customers tend to order a significant amount of equipment for delivery in the fourth quarter, and as a consequence, a significant portion of our annual sales typically occurs during that quarter. During the fourth quarter of 2013, five large mega-project (“MPD”) shipments contributed to a significant increase in net revenue, making it the strongest revenue quarter in the Company’s history. Normal seasonality trends generally show our lowest revenue in the first quarter of the year, with the first quarter of 2014 having followed that trend. Revenue in the second quarter of 2014, which historically has included one or more MPD shipments, was adversely impacted by the timing of MPD shipments and lower OEM sales.

A limited number of our customers account for a substantial portion of our net revenue and accounts receivable. Revenue from customers representing 10% or more of net revenue varies from period to period. For the three months ended June 30, 2014, one customer accounted for 14% of our net revenue. No other customer accounted for more than 10% of our net revenue during this period. For the six months ended June 30, 2014 and also for the three months and six months ended June 30, 2013, no customer accounted for more than 10% of our net revenue.

During the three and six months ended June 30, 2014 and 2013, the majority of our net revenue was attributable to sales outside of the United States. We expect sales outside of the United States to remain a significant portion of our net revenue for the next few years.

Our condensed consolidated financial statements are prepared in accordance with generally accepted accounting principles in the United States, or GAAP. These accounting principles require us to make estimates and judgments that can affect the reported amounts of assets and liabilities as of the date of the condensed consolidated financial statements as well as the reported amounts of revenue and expense during the periods presented. We believe that the estimates and judgments upon which we rely are reasonable based upon information available to us at the time that we make these estimates and judgments. To the extent that there are material differences between these estimates and actual results, our consolidated financial results will be affected. The accounting policies that reflect our more significant estimates and judgments and which we believe are the most critical to aid in fully understanding and evaluating our reported financial results are revenue recognition; allowance for doubtful accounts; allowance for product warranty; valuation of stock options; valuation and impairment of goodwill, long-lived assets, and acquired intangible assets; useful lives for depreciation and amortization; valuation adjustments for excess and obsolete inventory; deferred taxes and valuation allowances on deferred tax assets; and evaluation and measurement of contingencies, including contingent consideration.

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Second Quarter of 2014 Compared to Second Quarter of 2013

Results of Operations

The following table sets forth certain data from our operating results as a percentage of net revenue for the periods indicated (in thousands, except percentages):

	Three Months Ended June 30,
	2014					2013					Change Increase / (Decrease)
Results of Operations:*
Net revenue	$	6,407		100	%	$	8,569		100	%	$	(2,162	)	(25	%)
Cost of revenue		3,332		52	%		3,293		38	%		39		1	%
Gross profit		3,075		48	%		5,276		62	%		(2,201	)	(42	%)
Operating expenses:
General and administrative		2,995		47	%		3,326		39	%		(331	)	(10	%)
Sales and marketing		2,702		42	%		1,859		22	%		843		45	%
Research and development		1,724		27	%		1,137		13	%		587		52	%
Amortization of intangible assets		215		3	%		231		3	%		(16	)	(7	%)
Restructuring charges		—		0	%		44		1	%		(44	)	(100	%)
Total operating expenses		7,636		119	%		6,597		77	%		1,039		16	%
Loss from operations		(4,561	)	(71	%)		(1,321	)	(15	%)		(3,240	)	(245	%)
Other non-operating income (expense), net		8		0	%		25		0	%		(17	)	(68	%)
Loss before income taxes		(4,553	)	(71	%)		(1,296	)	(15	%)		(3,257	)	(251	%)
Provision for income taxes		58		1	%		161		2	%		(103	)	(64	%)
Net loss	$	(4,611	)	(72	%)	$	(1,457	)	(17	%)	$	(3,154	)	(216	%)

*     Percentages may not add up to 100% due to rounding

Net Revenue

Our net revenue decreased by $2.2 million, or 25%, to $6.4 million for the three months ended June 30, 2014 from $8.6 million for the three months ended June 30, 2013. The decrease was primarily due to lower MPD shipments of $1.5 million as the second quarter of 2014 did not include any MPD shipments and lower OEM shipments of $1.5 million. The decreases in MPD and OEM shipments were offset by higher aftermarket shipments of $0.6 million and revenue attributable to an oil & gas operating lease of $0.2 million.

Although we operate under one segment, we categorize revenue based on the type of energy recovery device and its related products and services. The following table reflects revenue by product category and as a percentage of total net revenue (in thousands, except percentages):

	Three Months Ended June 30,
	2014				2013
PX devices and related products and services	$	4,053	63	%	$	6,760	79	%
Turbochargers, pumps, and related products and services		2,149	34	%		1,809	21	%
Oil and gas product operating lease and related services		205	3	%		—	—
Net revenue	$	6,407	100	%	$	8,569	100	%

During the three months ended June 30, 2014 and 2013, a significant portion of our net revenue was attributable to sales outside of the United States. Revenue attributable to domestic and international sales as a percentage of net revenue was as follows:

	Three Months Ended June 30,
	2014			2013
Domestic revenue		4	%		5	%
International revenue		96	%		95	%
Net revenue		100	%		100	%

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Gross Profit

Gross profit represents our net revenue less our cost of revenue. Our cost of revenue consists primarily of raw materials, personnel costs (including share-based compensation), manufacturing overhead, warranty costs, depreciation expense, and manufactured components. For the three months ended June 30, 2014, gross profit as a percentage of net revenue was 48%. For the three months ended June 30, 2013, gross profit as a percentage of net revenue was 62%.

The decrease in gross profit as a percentage of net revenue for the three months ended June 30, 2014 as compared to the same period of last year was primarily due to lower sales and a shift in product mix toward turbochargers and pumps.

Future gross profit is highly dependent on the product and customer mix of our net revenues, overall market demand and competition, and the volume of production in our manufacturing plant that determines our operating leverage. Accordingly, we are not able to predict our future gross profit levels with certainty. We do believe, however, that recently reported levels of gross profit margin are sustainable to the extent that volume remains healthy, our product mix favors PX devices, and we continue realize cost savings though production efficiencies and enhanced yields.

Manufacturing average headcount decreased to 41 in the second quarter of 2014 from 44 in the second quarter of 2013.

Share-based compensation expense included in cost of revenue was $26,000 and $18,000 for the three months ended June 30, 2014 and 2013, respectively.

General and Administrative Expense

General and administrative expense decreased by $331,000, or 10%, to $3.0 million for the three months ended June 30, 2014 from $3.3 million for the three months ended June 30, 2013. As a percentage of net revenue, general and administrative expense increased to 47% for the three months ended June 30, 2014 from 39% for the three months ended June 30, 2013 primarily due to lower net revenue in the current period.

General and administrative average headcount decreased to 27 in the second quarter of 2014 from 28 in the second quarter of 2013.

Of the $331,000 decrease in general and administrative expense for the three months ended June 30, 2014 compared to the same quarter of 2013, $310,000 related to compensation and employee-related benefits, $84,000 related to bad debt expense, and $73,000 related to occupancy costs. Decreases in compensation, employee-related benefits and occupancy costs are associated with the redeployment of personnel to oil & gas development. The decreases were offset by increases of $122,000 related to professional fees and other services and $14,000 related to other general administrative expenses.

Share-based compensation expense included in general and administrative expense was $365,000 and $307,000 for the three months ended June 30, 2014 and 2013, respectively.

Sales and Marketing Expense

Sales and marketing expense increased by $843,000, or 45%, to $2.7 million for the three months ended June 30, 2014 from $1.9 million for the three months ended June 30, 2013. As a percentage of net revenue, sales and marketing expense increased to 42% for the three months ended June 30, 2014 from 22% for the three months ended June 30, 2013 primarily due to higher sales and marketing expense and lower net revenue in the current period.

Sales and marketing average headcount increased to 34 in the second quarter of 2014 from 27 in the second quarter of 2013.

Of the $843,000 increase in sales and marketing expense for the three months ended June 30, 2014 compared to the same quarter of 2013, $738,000 related to compensation and employee-related benefits partially associated with the increase in headcount and $134,000 related to marketing costs associated with trade show participation both to further accelerate growth in new markets such as oil & gas. Additionally, there was an increase of $48,000 related to occupancy costs also associated with the increase in headcount. The increases were offset by decreases of $53,000 related to commissions to sales representatives and $24,000 related to professional and other services and other sales and marketing expenses.

Share-based compensation expense included in sales and marketing expense was $155,000 and $120,000 for the three months ended June 30, 2014 and 2013, respectively.

As we continue to pursue new addressable markets such as oil &gas outside of seawater desalination, we anticipate that our sales and marketing expenses will increase in the future.

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Research and Development Expense

Research and development expense increased by $587,000, or 52%, to $1.7 million for the three months ended June 30, 2014 from $1.1 million for the three months ended June 30, 2013. As a percentage of net revenue, research and development expense increased to 27% for the three months ended June 30, 2014 from 13% for the three months ended June 30, 2013 primarily due to higher research and development expense and lower net revenue in the current period.

Average headcount in our research and development department was constant at 18 for both the second quarter of 2014 and the second quarter of 2013.

Of the $587,000 increase in research and development expense for the three months ended June 30, 2014 compared to the same quarter of 2013, $350,000 related to costs associated with the Company’s investment in product development for markets outside of seawater desalination such as oil & gas, $160,000 related to outside consulting and professional fees, and $77,000 related to compensation, employee-related benefits, and occupancy cost.

Share-based compensation expense included in research and development expense was $88,000 and $53,000 for the three months ended June 30, 2014 and 2013, respectively.

As we continue to advance our existing technologies and develop new energy recovery and efficiency-enhancing solutions for markets outside of seawater desalination such as oil &gas, we anticipate that our research and development expenses will increase in the future.

Amortization of Intangible Assets

Amortization of intangible assets is primarily related to finite-lived intangible assets acquired as a result of our purchase of Pump Engineering, LLC in December 2009. Amortization expense decreased by $16,000 in the second quarter of 2014 compared to the second quarter of 2013 due to a change in the amortization amount for customer relationships, which applies a variable amortization schedule (in this case, sum-of-the-years-digit).

Restructuring Charges

In 2011, we initiated a restructuring plan to consolidate our North American operations and transfer our Michigan-based operations to our manufacturing center and headquarters in San Leandro, California. In connection with this restructuring plan, we classified the land and building located in Michigan as assets held for sale at December 31, 2011. During the three months ended June 30, 2013, we recognized an impairment loss of $44,000 related to these assets held for sale. The land and building were sold in September 2013.

Non-Operating Income (Expense), Net

Non-operating income (expense), net, decreased by $17,000 to income of $8,000 in the three months ended June 30, 2014 from income of $25,000 in the three months ended June 30, 2013. The decrease was primarily due to $20,000 of higher net foreign currency losses in the second quarter of 2014 compared to the second quarter of 2013 offset by $3,000 of higher interest income during the same period.

Income Taxes

The income tax provision was $58,000 in the three months ended June 30, 2014 compared to $161,000 in the three months ended June 30, 2013. The tax provision for the three months ended June 30, 2014 primarily relates to the deferred tax effects associated with the amortization of goodwill and state and other taxes.   The tax expense for the three months ended June 30, 2013 primarily relates to a federal tax to actual provision adjustment, the deferred tax effects associated with the amortization of goodwill, and state and other taxes.

21

Six Months Ended June 30, 2014 Compared to Six Months Ended June 30, 2013

Results of Operations

The following table sets forth certain data from our operating results as a percentage of net revenue for the periods indicated (in thousands, except percentages):

	Six Months Ended June 30,
	2014					2013					Change Increase / (Decrease)
Results of Operations:*
Net revenue	$	10,304		100	%	$	14,942		100	%	$	(4,638	)	(31	%)
Cost of revenue		4,984		48	%		6,649		44	%		(1,665	)	(25	%)
Gross profit		5,320		52	%		8,293		56	%		(2,973	)	(36	%)
Operating expenses:
General and administrative		5,034		49	%		7,496		50	%		(2,462	)	(33	%)
Sales and marketing		5,197		50	%		3,870		26	%		1,327		34	%
Research and development		2,958		29	%		2,219		15	%		739		33	%
Amortization of intangible assets		430		4	%		461		3	%		(31	)	(7	%)
Restructuring charges		—		0	%		44		0	%		(44	)	(100	%)
Total operating expenses		13,619		132	%		14,090		94	%		(471	)	(3	%)
Loss from operations		(8,299	)	(81	%)		(5,797	)	(39	%)		(2,502	)	(43	%)
Other non-operating income (expense), net		129		1	%		52		0	%		77		148	%
Loss before income taxes		(8,170	)	(79	%)		(5,745	)	(38	%)		(2,425	)	(42	%)
Provision for income taxes		124		1	%		222		1	%		(98	)	(44	%)
Net loss	$	(8,294	)	(80	%)	$	(5,967	)	(40	%)	$	(2,327	)	(39	%)

*     Percentages may not add up to 100% due to rounding

Net Revenue

Our net revenue decreased by $4.6 million, or 31%, to $10.3 million for the six months ended June 30, 2014 from $14.9 million for the six months ended June 30, 2013. The decrease was primarily due to lower MPD shipments of $1.5 million as the first six months of 2014 did not include any MPD shipments and lower OEM shipments of $4.6 million. The decreases in MPD and OEM shipments were offset by higher aftermarket shipments of $1.1 million and revenue attributable to an oil & gas operating lease of $0.3 million.

Although we operate under one segment, we categorize revenue based on the type of energy recovery device and its related products and services. The following table reflects revenue by product category and as a percentage of total net revenue (in thousands, except percentages):

	Six Months Ended June 30,
	2014				2013
PX devices and related products and services	$	6,439	63	%	$	10,699	72	%
Turbochargers, pumps, and related products and services		3,523	34	%		4,243	28	%
Oil and gas product operating lease and related services		342	3	%		—	—
Net revenue	$	10,304	100	%	$	14,942	100	%

During the six months ended June 30, 2014 and 2013, a significant portion of our net revenue was attributable to sales outside of the United States. Revenue attributable to domestic and international sales as a percentage of net revenue was as follows:

	Six months ended June 30,
	2014			2013
Domestic revenue		6	%		12	%
International revenue		94	%		88	%
Net revenue		100	%		100	%

22

Gross Profit

Gross profit represents our net revenue less our cost of revenue. Our cost of revenue consists primarily of raw materials, personnel costs (including share-based compensation), manufacturing overhead, warranty costs, depreciation expense, and manufactured components. For the six months ended June 30, 2014, gross profit as a percentage of net revenue was 52%. For the six months ended June 30, 2013, gross profit as a percentage of net revenue was 56%.

The decrease in gross profit as a percentage of net revenue for the six months ended June 30, 2014 as compared to the same period of last year was primarily due to lower sales and a shift in product mix toward turbochargers and pumps.

Future gross profit is highly dependent on the product and customer mix of our net revenues, overall market demand and competition, and the volume of production in our manufacturing plant that determines our operating leverage. Accordingly, we are not able to predict our future gross profit levels with certainty. We do believe, however, that recently reported levels of gross profit margin are sustainable to the extent that volume remains healthy, our product mix favors PX devices, and we continue realize cost savings though production efficiencies and enhanced yields.

Manufacturing average headcount decreased to 42 for the first six months of 2014 from 44 for the first six months of 2013.

Share-based compensation expense included in cost of revenue was $48,000 and $39,000 for the six months ended June 30, 2014 and 2013, respectively.

General and Administrative Expense

General and administrative expense decreased by $2.5 million, or 33%, to $5.0 million for the six months ended June 30, 2014 from $7.5 million for the six months ended June 30, 2013. As a percentage of net revenue, general and administrative expense decreased to 49% for the six months ended June 30, 2014 from 50% for the six months ended June 30, 2013 primarily due to lower general and administrative expense and lower net revenue in the current period.

General and administrative average headcount decreased to 27 for the first six months of 2014 from 28 for the first six months of 2013.

Of the $2.5 million decrease in general and administrative expense for the six months ended June 30, 2014 compared to the same period of 2013, $972,000 related to compensation and employee-related benefits associated with the redeployment of personnel to oil & gas development, $850,000 related to the reversal of VAT expensed in 2011 and prior for which we subsequently sought recovery and a conclusion was reached by the Spanish authorities during the first quarter of 2014, $537,000 related to professional fees and other services, primarily related to legal and IT expenses, and $102,000 related to bad debt expense, occupancy costs, and other administrative costs.

Share-based compensation expense included in general and administrative expense was $694,000 and $814,000 for the six months ended June 30, 2014 and 2013, respectively.

Sales and Marketing Expense

Sales and marketing expense increased by $1.3 million, or 34%, to $5.2 million for the six months ended June 30, 2014 from $3.9 million for the six months ended June 30, 2013. As a percentage of net revenue, sales and marketing expense increased to 50% for the six months ended June 30, 2014 from 26% for the six months ended June 30, 2013 primarily due to higher sales and marketing expense and lower net revenue in the current period.

Sales and marketing average headcount increased to 31 for the first six months of 2014 from 26 in the first six months of 2013.

Of the $1.3 million increase in sales and marketing expense for the six months ended June 30, 2014 compared to the same quarter of 2013, $1.3 million related to compensation and employee-related benefits associated with the increase in headcount and $299,000 related to marketing costs associated with trade show participation to further accelerate growth in new markets such as oil & gas. Additionally there was an increase of $22,000 related to occupancy costs also associated with the increase in headcount. The increases were offset by decreases of $210,000 related to professional fees and other services, $124,000 related to commissions to sales representatives, and $5,000 related to other sales and marketing expenses.

Share-based compensation expense included in sales and marketing expense was $308,000 and $235,000 for the six months ended June 30, 2014 and 2013, respectively.

As we continue to pursue new addressable markets such as oil& gas outside of seawater desalination, we anticipate that our sales and marketing expenses will increase in the future.

23

Research and Development Expense

Research and development expense increased by $739,000, or 33%, to $3.0 million for the six months ended June 30, 2014 from $2.2 million for the six months ended June 30, 2013. As a percentage of net revenue, research and development expense increased to 29% for the six months ended June 30, 2014 from 15% for the six months ended June 30, 2013 primarily due to higher research and development expense and lower net revenue in the current period.

Average headcount in our research and development department decreased to 17 for the first six months of 2014 compared to 18 in the first six months of 2013.

Of the $739,000 increase in research and development expense for the six months ended June 30, 2014 compared to the same quarter of 2013, $497,000 related to costs associated with the Company’s investment in product development for markets outside of seawater desalination such as oil & gas, $238,000 related to outside consulting and professional fees, and $23,000 related to occupancy cost. The increases were offset by a decrease of $19,000 related to compensation and employee-related benefits.

Share-based compensation expense included in research and development expense was $165,000 and $99,000 for the six months ended June 30, 2014 and 2013, respectively.

As we continue to advance our existing technologies and develop new energy recovery and efficiency-enhancing solutions for markets outside of seawater desalination such as oil &gas, we anticipate that our research and development expenses will increase in the future.

Amortization of Intangible Assets

Amortization of intangible assets is primarily related to finite-lived intangible assets acquired as a result of our purchase of Pump Engineering, LLC in December 2009. Amortization expense decreased by $31,000 in the first six months of 2014 compared to the first six months of 2013 due to a change in the amortization amount for customer relationships, which applies a variable amortization schedule (in this case, sum-of-the-years-digit).

Restructuring Charges

In 2011, we initiated a restructuring plan to consolidate our North American operations and transfer our Michigan-based operations to our manufacturing center and headquarters in San Leandro, California. In connection with this restructuring plan, we classified the land and building located in Michigan as assets held for sale at December 31, 2011. During the six months ended June 30, 2013, we recognized an impairment loss of $44,000 related to these assets held for sale. The land and building were sold in September 2013.

Non-Operating Income (Expense), Net

Non-operating income (expense), net, increased by $77,000 to income of $129,000 in the six months ended June 30, 2014 from income of $52,000 in the six months ended June 30, 2013. The increase was primarily due to $128,000 of higher interest income in the first six months of 2014, primarily related to our VAT tax refund, compared to the first six months of 2013 offset by $51,000 of higher net foreign currency losses during the same period.

Income Taxes

The income tax provision was $124,000 in the six months ended June 30, 2014 compared to $222,000 in the six months ended June 30, 2013. The tax provision for the six months ended June 30, 2014 primarily relates to the deferred tax effects associated with the amortization of goodwill and state and other taxes. The tax expense for the six months ended June 3, 2013 primarily relates to a federal tax to actual provision adjustment, the deferred tax effects associated with the amortization of goodwill, and state and other taxes.

24

Liquidity and Capital Resources

Overview

Our primary source of cash historically has been proceeds from the issuance of common stock, customer payments for our products and services, and borrowings under our credit facility. From January 1, 2005 through June 30, 2014, we issued common stock for aggregate net proceeds of $85.6 million, excluding common stock issued in exchange for promissory notes. The proceeds from the sales of common stock have been used to fund our operations and capital expenditures.

As of June 30, 2014, our principal sources of liquidity consisted of unrestricted cash and cash equivalents of $16.4 million that are invested primarily in money market funds; short-term and long-term investments of $15.3 million that are primarily invested in marketable debt securities; and accounts receivable of $9.4 million. We invest cash not needed for current operations predominantly in high-quality, investment-grade, and marketable debt instruments with the intent to make such funds available for operating purposes as needed.

We currently have unbilled receivables pertaining to customer contractual holdback provisions, whereby we will invoice the final installment due under a sales contract six to 19 months after the product has been shipped to the customer and revenue has been recognized. The customer holdbacks represent amounts intended to provide a form of security to the customer; accordingly, these receivables have not been discounted to present value as they provide security to only one party in the agreement. At June 30, 2014 we had $1.4 million of short- and long-term unbilled receivables.

In 2009, we entered into a loan and security agreement (the “2009 Agreement”) with a financial institution. The 2009 Agreement, as amended, provided a total available credit line of $16.0 million. Under the 2009 Agreement, we were allowed to draw advances of up to $10.0 million on a revolving line of credit or utilize up to $15.9 million as collateral for stand-by letters of credit, provided that the aggregate of the outstanding advances and collateral did not exceed the total available credit line of $16.0 million. Advances under the revolving line of credit incurred interest based on a prime rate index or on LIBOR plus 1.375%. The amended 2009 Agreement also required us to maintain a cash collateral balance equal to at least 101% of the face amount of all outstanding stand-by letters of credit collateralized by the line of credit and 100% of the amount of all outstanding advances.

During the periods presented, we provided certain customers with stand-by letters of credit to secure our obligations for the delivery and performance of products in accordance with sales arrangements. Some of these stand-by letters of credit were issued under our 2009 Agreement. The stand-by letters of credit generally terminate within 12 to 48 months from issuance. As of June 30, 2014, the amounts outstanding on stand-by letters of credit collateralized under our 2009 Agreement totaled approximately $2.7 million, and restricted cash related to the stand-by letters of credit issued under the 2009 Agreement was approximately $2.8 million. Of this $2.8 million restricted cash, $2.4 million was classified as current and $0.4 million was non-current. The 2009 Agreement expired at the end of May 2012, at which time we became required to maintain a cash collateral balance equal to at least 105% of the face amount of all outstanding stand-by letters of credit collateralized by the line of credit. There were no advances drawn on the line of credit under the 2009 Agreement at the time of its expiration. The restricted cash related to the outstanding stand-by letters of credit under the 2009 Agreement is expected to be released at various dates through 2015.

In June 2012, we entered into a loan agreement (the “2012 Agreement”) with another financial institution. The 2012 Agreement provides for a total available credit line of $16.0 million. Under the 2012 Agreement, we are allowed to draw advances not to exceed, at any time, $10.0 million as revolving loans. The total stand-by letters of credit issued under the 2012 Agreement may not exceed the lesser of the $16.0 million credit line or the credit line minus all outstanding revolving loans. At no time may the aggregate of the revolving loans and stand-by letters of credit exceed the total available credit line of $16.0 million. Revolving loans may be in the form of a base rate loan that bears interest equal to the prime rate plus 0% or a Eurodollar loan that bears interest equal to the adjusted LIBOR plus 1.25%. Stand-by letters of credit are subject to customary fees and expenses for issuance or renewal. The unused portion of the credit facility is subject to a fee in an amount equal to 0.25% per annum of the average unused portion of the revolving line.

We are subject to certain financial and administrative covenants under the 2012 Agreement. As of June 30, 2014, we were in compliance with these covenants.

The 2012 Agreement requires us to maintain a cash collateral balance equal to 101% of all outstanding advances and all outstanding stand-by letters of credit collateralized by the line of credit. The 2012 Agreement matures on June 5, 2015 and is collateralized by substantially all of our assets. As of June 30, 2014 there were no advances drawn under the 2012 Agreement’s line of credit. The amounts outstanding on stand-by letters of credit collateralized under the 2012 Agreement totaled approximately $2.3 million, and restricted cash related to the stand-by letters of credit issued under the 2012 Agreement was approximately $2.4 million as of June 30, 2014. Of this $2.4 million of restricted cash, $0.9 million was classified as current and $1.5 million was classified as non-current.

25

In 2012, our company credit card vendor required us to restrict cash for outstanding credit card balances. Accordingly, we have restricted $315,000 of cash for credit card balances at June 30, 2014, all of which was classified as current.

We acquired Pump Engineering, LLC in December 2009. Under the terms of the purchase agreement, $3.5 million of consideration was contingent upon achievement of certain performance milestones. These performance milestones were tied to: (i) achieving certain minimum product energy efficiency metrics ($1.3 million); (ii) meeting certain product delivery time schedules ($1.2 million); and (iii) meeting certain product warranty metrics ($1.0 million). During the fourth quarter of 2010, the first two performance milestones were not met. Accordingly, we withheld payment of $2.5 million under the contractual terms of the purchase agreement. In August 2011, the former shareholders of Pump Engineering, LLC filed a claim against us seeking damages in the amount of $2.5 million and their litigation costs. As a result, we have restricted cash of $3.5 million, the entire amount of the original contingent consideration. Of the $3.5 million cash restricted, $2.5 million is classified as current and $1.0 million is non-current.

Cash Flows from Operating Activities

Net cash used in operating activities was $(193,000) and $(2.6) million for the six months ended June 30, 2014 and 2013, respectively. For the six months ended June 30, 2014, a net loss of $(8.3) million was adjusted to $(4.6) million by non-cash items totaling $3.7 million. For the six months ended June 30, 2013, the net loss of $(6.0) million was adjusted to $(2.4) million by non-cash items totaling $3.6 million. Non-cash adjustments during the six months ended June 30, 2014, primarily include depreciation and amortization of $2.0 million, share-based compensation of $1.2 million, amortization of premiums/discounts on investments of $0.2 million, and provisions for doubtful accounts of $0.1 million.

The net cash impact from changes in assets and liabilities was approximately $4.4 million and $(183,000) for the six months ended June 30, 2014 and 2013, respectively. Net changes in assets and liabilities during the six months ended June 30, 2014 are primarily attributable to a decrease of $11.0 million in accounts receivable and unbilled receivables as a result of the timing of invoices and collections for large projects that were shipped in the fourth quarter of 2013 and a $0.6 million increase in accounts payable. These changes were offset by an increase in inventory of $4.7 million as a result of inventory buildup for future shipments, a decrease in accrued expenses and other liabilities of $2.4 million as a result of a VAT settlement in Spain and the timing of payments to employees, vendors, and other third parties, and an increase of $0.2 million in prepaid expenses

Cash Flows from Investing Activities

Cash flows provided by (used in) investing activities primarily relate to maturities of investments in marketable securities and the release of restricted cash used to collateralize our stand-by letters of credit offset by capital expenditures to support our growth and additional investments in marketable securities.

Net cash provided by (used in) investing activities was $1.7 million and $(2.9) million for the six months ended June 30, 2014 and 2013, respectively. Cash flows provided by investing activities for the six months ended June 30, 2014 was primarily due to the maturity of marketable securities of $4.0 million. This source of cash provided by investing activities was offset by $2.1 million of additions to property and equipment and the restriction of $0.2 million in cash to collateralize stand-by letters of credit.

Cash Flows from Financing Activities

Net cash provided by financing activities was $505,000 and $212,000 for the six months ended June 30, 2014 and 2013, respectively. Net cash provided in financing activities was the result of $1.1 million received for the issuance of common stock due to option and warrant exercises offset by the use of $633,000 to repurchase common stock for treasury.

Liquidity and Capital Resource Requirements

We believe that our existing cash balances and cash generated from operations will be sufficient to meet our anticipated capital requirements for at least the next twelve months. However, we may need to raise additional capital or incur additional indebtedness to continue to fund our operations or to support acquisitions in the future. Our future capital requirements will depend on many factors, including our rate of revenue growth, if any, the expansion of our sales and marketing and research and development activities, the amount and timing of cash used for stock repurchases, the timing and extent of our expansion into new geographic territories, the timing of new product introductions, and the continuing market acceptance of our products. We may enter into potential material investments in, or acquisitions of, complementary businesses, services, or technologies in the future, which could also require us to seek additional equity or debt financing. Additional funds may not be available on terms favorable to us or at all.

26

Contractual Obligations

We lease facilities under fixed non-cancellable operating leases that expire on various dates through 2019. The total of the future minimum lease payments under these leases as of June 30, 2014 was $8.5 million. For additional information, see Note 9 — “Commitments and Contingencies” to the unaudited condensed consolidated financial statements.

In the course of our normal operations, we also enter into purchase commitments with our suppliers for various raw materials and components parts. The purchase commitments covered by these arrangements are subject to change based on sales forecasts for future deliveries. As of June 30, 2014, we had approximately $3.2 million of cancellable open purchase order arrangements related primarily to materials and parts.

We have agreements with guarantees or indemnity provisions that we have entered into with customers and others in the ordinary course of business. Based on our historical experience and information known to us as of June 30, 2014, we believe that our exposure related to these guarantees and indemnities was not material.

Off-Balance Sheet Arrangements

During the periods presented, we did not have any relationships with unconsolidated entities or financial partnerships such as entities often referred to as structured finance or special purpose entities that would have been established for the purpose of facilitating off-balance sheet arrangements or other contractually narrow or limited purposes.

Recent Accounting Pronouncements

See Note 1 — “The Company and Summary of Significant Accounting Policies” to the condensed consolidated financial statements regarding the impact of certain recent accounting pronouncements on our condensed consolidated financial statements.

Item 3. Quantitative and Qualitative Disclosure About Market Risk

The information in this section should be read in connection with the information on financial market risk related to changes in currency exchange rates and interest rates in Part II, Item 7A, “Quantitative and Qualitative Disclosure About Market Risk,” in our Annual Report on Form 10-K for the year ended December 31, 2013.

Foreign Currency Risk

The majority of our revenue contracts have been denominated in United States Dollars. In some circumstances, we have priced certain international sales in Euros.

As we expand our international sales, we expect that a portion of our net revenue could continue to be denominated in foreign currencies. As a result, our cash and cash equivalents and operating results could be increasingly affected by changes in exchange rates. Our international sales and marketing operations incur expenses that are denominated in foreign currencies. These expenses could be materially affected by currency fluctuations. Our exposures are to fluctuations in exchange rates for the United States Dollar versus the Euro, United Arab Emirates Dirham, and Chinese Yuan. Changes in currency exchange rates could adversely affect our consolidated operating results or financial position. Additionally, our international sales and marketing operations maintain cash balances denominated in foreign currencies. To decrease the inherent risk associated with translation of foreign cash balances into our reporting currency, we have not maintained excess cash balances in foreign currencies. We have not hedged our exposure to changes in foreign currency exchange rates because expenses and cash balances in foreign currencies have been insignificant to date and exchange rate fluctuations have had little impact on our operating results and cash flows.

Interest Rate Risk

We have an investment portfolio of fixed income marketable debt securities, including amounts classified as cash equivalents, short-term investments, and long-term investments. At June 30, 2014, our short- and long-term investments totaled $15.3 million. The primary objective of our investment activities is to preserve principal and liquidity while at the same time maximizing yields without significantly increasing risk. We invest primarily in high-quality, short-term and long-term debt instruments of the U.S. government and its agencies as well as high-quality corporate issuers. These investments are subject to interest rate fluctuations and will decrease in market value if interest rates increase. To minimize the exposure due to adverse shifts in interest rates, we maintain investments with an average maturity of less than eighteen months. A hypothetical 1% increase in interest rates would have resulted in an approximately $134,000 decrease in the fair value of our fixed-income debt securities as of June 30, 2014.

27

Concentration of Credit Rate Risk

Our investments in marketable debt securities are subject to potential loss of value due to counterparty credit risk. To minimize this risk, we invest pursuant to a Board-approved investment policy. The policy mandates high-credit-rating requirements and restricts our exposure to any single corporate issuer or sector by imposing concentration limits.

Item 4. Controls and Procedures.

(a) Evaluation of disclosure controls and procedures. Under the supervision and with the participation of our management, including the President and Chief Executive Officer and the Chief Financial Officer, we have evaluated the effectiveness of our disclosure controls and procedures as defined in Rule 13a-15(e) of the Securities Exchange Act of 1934 as of the end of the period covered by this report.

Based on that evaluation, the Chief Executive Officer and the Chief Financial Officer have concluded that these disclosure controls and procedures are effective.

(b) Changes in internal controls. There were no changes in our internal control over financial reporting during the quarter ended June 30, 2014 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

PART II — OTHER INFORMATION

Item 1. Legal Proceedings

Note 9 – “Commitments and Contingencies”, under the caption “Litigation” of our Annual Report on Form 10-K filed with the SEC on March 11, 2014, provides information on certain litigation in which we are involved.

For an update on the litigation matters previously disclosed in our Form 10-K, see Note 9 – “Commitments and Contingencies”, under the caption “Litigation” of this quarterly report on Form 10-Q.

Item 1A. Risk Factors

There has been no material changes in our risk factors from those disclosed in Part I, Item 1A, in our Annual Report on Form 10-K filed on March 11, 2014.

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

Purchases of Equity Securities by the Issuer and Affiliated Purchasers

In February 2014, our Board of Directors authorized a stock repurchase program under which up to three million shares, not to exceed $6.0 million in aggregate cost, of our outstanding common stock could be repurchased through December 31, 2014 at the discretion of management. There was no stock repurchase activity during the three months ended June 30, 2014.

28

Item 6. Exhibits

Exhibit No.	Description
10.1	Energy Recovery, Inc. Annual Incentive Plan, incorporated by reference to Exhibit 10.1 in the Company’s Form 8-K filed on April 30, 2014
10.2	Offer Letter to Mr. Joel Gay, incorporated by reference to Exhibit 99.2 in the Company’s From 8-K filed on July 8, 2014
31.1	Certification of Principal Executive Officer Pursuant to Exchange Act Rule 13a-14(a) or 15d-14(a), as Adopted Pursuant to Section 302 of The Sarbanes Oxley Act of 2002
31.2	Certification of Principal Financial Officer Pursuant to Exchange Act Rule 13a-14(a) or 15d-14(a), as Adopted Pursuant to Section 302 of The Sarbanes Oxley Act of 2002
32.1	Certifications of Chief Executive Officer and Chief Financial Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
101.INS	XBRL Instance Document
101.SCH	XBRL Taxonomy Extension Schema Document
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document
101.DEF	XBRL Taxonomy Extension Definition Linkbase Document
101.LAB	XBRL Taxonomy Extension Label Linkbase Document
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document

29

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.

Registrant: Energy Recovery, Inc.

By:	/s/ THOMAS S. ROONEY, JR. Thomas S. Rooney, Jr.	President and Chief Executive Officer (Principal Executive Officer)	August 7, 2014
	/s/ JOEL GAY Joel Gay	Chief Financial Officer (Principal Financial Officer)	August 7, 2014

30

Exhibit List

Exhibit No.	Description
10.1	Energy Recovery, Inc. Annual Incentive Plan, incorporated by reference to Exhibit 10.1 in the Company’s Form 8-K filed on April 30, 2014
10.2	Offer Letter to Mr. Joel Gay, incorporated by reference to Exhibit 99.2 in the Company’s From 8-K filed on July 8, 2014
31.1	Certification of Principal Executive Officer Pursuant to Exchange Act Rule 13a-14(a) or 15d-14(a), as Adopted Pursuant to Section 302 of The Sarbanes Oxley Act of 2002
31.2	Certification of Principal Financial Officer Pursuant to Exchange Act Rule 13a-14(a) or 15d-14(a), as Adopted Pursuant to Section 302 of The Sarbanes Oxley Act of 2002
32.1	Certifications of Chief Executive Officer and Chief Financial Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
101.INS	XBRL Instance Document
101.SCH	XBRL Taxonomy Extension Schema Document
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document
101.DEF	XBRL Taxonomy Extension Definition Linkbase Document
101.LAB	XBRL Taxonomy Extension Label Linkbase Document
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document

31 

EX-31

Exhibit 31.1

CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER

PURSUANT TO EXCHANGE ACT RULE 13a-14(a) OR 15d-14(a), AS ADOPTED PURSUANT TO

SECTION 302 OF THE SARBANES OXLEY ACT OF 2002

I, Thomas S. Rooney, Jr., certify that:

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

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

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

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

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

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

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

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

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

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

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

Date: August 7, 2014
		/s/ THOMAS S. ROONEY, JR.
	Name:	Thomas S. Rooney, Jr.
	Title:	Chief Financial Officer
		(Principal Financial Officer)

EX-31

Exhibit 31.2

CERTIFICATION OF PRINCIPAL FINANCIAL OFFICER

PURSUANT TO EXCHANGE ACT RULE 13a-14(a) OR 15d-14(a), AS ADOPTED PURSUANT TO

SECTION 302 OF THE SARBANES OXLEY ACT OF 2002

I, Joel Gay, certify that:

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

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

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

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

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

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

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

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

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

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

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

Date: August 7, 2014
		/s/ JOEL GAY
	Name:	Joel Gay
	Title:	Chief Financial Officer
		(Principal Financial Officer)

EX-32

Exhibit 32.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER AND CHIEF FINANCIAL OFFICER,

PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE

SARBANES-OXLEY ACT OF 2002*

Pursuant to the requirement set forth in Rule 13a-14(b) of the Securities and Exchange Act of 1934, as amended (the “Exchange Act”), and Section 1350 of Chapter 63 of Title 18 of the United States Code, Thomas S. Rooney, Jr., President and Chief Executive Officer of Energy Recovery, Inc. (the “Company”), and Joel Gay, Chief Financial Officer of the Company, each hereby certify that, to the best of their knowledge:

1. The Company’s Quarterly Report on Form 10-Q for the period ended June 30, 2014, to which this Certification is attached as Exhibit 32.1 (the “Quarterly Report”) fully complies with the requirements of Section 13(a) or Section 15(d) of the Exchange Act, and

2. The information contained in the Quarterly Report fairly presents, in all material respects, the financial condition of the Company at the end of the period covered by the Quarterly Report and results of operations of the Company for the period covered by the Quarterly Report.

/s/ THOMAS S. ROONEY, JR.	/s/ JOEL GAY
President and Chief Executive Officer	Chief Financial Officer
Dated: August 7, 2014	Dated: August 7, 2014

____________

* This certification accompanies the Form 10-Q to which it relates, is not deemed filed with the Securities and Exchange Commission and is not to be incorporated by reference into any filing of Energy Recovery, Inc. under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended (whether made before or after the date of the Form 10-Q), irrespective of any general incorporation language contained in such filing.

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Note 5 - Investments (Details) - Available-For-Sale Securities (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Short-term investments:
Amortized Cost	$ 15,247	$ 19,551
Gross Unrealized Holding Gains	24	17
Gross Unrealized Holding Losses	(6)	(18)
Fair Value	15,265	19,550
Short-term Investments [Member] | State and Local Government Obligations [Member]
Short-term investments:
Amortized Cost	973	2,113
Gross Unrealized Holding Gains	1	3
Fair Value	974	2,116
Short-term Investments [Member] | Corporate Debt Securities [Member]
Short-term investments:
Amortized Cost	9,431	3,739
Gross Unrealized Holding Gains	18	2
Gross Unrealized Holding Losses	(2)	(1)
Fair Value	9,447	3,740
Short-term Investments [Member]
Short-term investments:
Amortized Cost	10,404	5,852
Gross Unrealized Holding Gains	19	5
Gross Unrealized Holding Losses	(2)	(1)
Fair Value	10,421	5,856
Other Long-term Investments [Member] | State and Local Government Obligations [Member]
Short-term investments:
Amortized Cost		227
Gross Unrealized Holding Gains		1
Fair Value		228
Other Long-term Investments [Member] | Corporate Debt Securities [Member]
Short-term investments:
Amortized Cost	4,843	13,472
Gross Unrealized Holding Gains	5	11
Gross Unrealized Holding Losses	(4)	(17)
Fair Value	4,844	13,466
Other Long-term Investments [Member]
Short-term investments:
Amortized Cost	4,843	13,699
Gross Unrealized Holding Gains	5	12
Gross Unrealized Holding Losses	(4)	(17)
Fair Value	$ 4,844	$ 13,694

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Note 12 - Fair Value Measurements (Details) - Fair Value Measurements, Level 3 (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014		Dec. 31, 2013
Note 12 - Fair Value Measurements (Details) - Fair Value Measurements, Level 3 [Line Items]
Acquisition-related contingent consideration	$ 1,535	[1]	$ 1,524	[1]
Fair Value, Inputs, Level 3 [Member]
Note 12 - Fair Value Measurements (Details) - Fair Value Measurements, Level 3 [Line Items]
Acquisition-related contingent consideration	$ 1,535	[1]	$ 1,524	[1]
Acquisition-related contingent consideration	Income approach
Acquisition-related contingent consideration	Probability of outcome
Fair Value, Inputs, Level 3 [Member] | Minimum [Member]
Note 12 - Fair Value Measurements (Details) - Fair Value Measurements, Level 3 [Line Items]
Acquisition-related contingent consideration	50.00%
Fair Value, Inputs, Level 3 [Member] | Maximum [Member]
Note 12 - Fair Value Measurements (Details) - Fair Value Measurements, Level 3 [Line Items]
Acquisition-related contingent consideration	100.00%

[1] Included in Accrued Expenses and Other Current Liabilities and Other Non-Current Liabilities.

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Note 9 - Commitments and Contingencies (Details) - Product Warranty Liability (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Product Warranty Liability [Abstract]
Balance, beginning of period	$ 705	$ 1,256	$ 709	$ 1,172
Warranty costs charged to cost of revenue	50	41	53	138
Change in estimate		(132)		(132)
Utilization of warranty	(50)	(138)	(57)	(151)
Balance, end of period	$ 705	$ 1,027	$ 705	$ 1,027

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Note 12 - Fair Value Measurements (Details) - Reconciliation of Assets and Liabilities Measured on a Recurring Basis Using Significant Unobservable Inputs (Contingent Consideration [Member], USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014
Contingent Consideration [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance	$ 1,524
Loss due to change in value	11
Balance	$ 1,535

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Note 9 - Commitments and Contingencies (Details) (USD $)						6 Months Ended
	Jun. 30, 2014	Mar. 28, 2014 Product Energy Efficiency Metrics [Member]	Mar. 28, 2014 Product Delivery Time Schedules [Member]	Jun. 30, 2014 The 2009 Agreement [Member]	Jun. 30, 2014 The 2012 Agreement [Member]	Jun. 30, 2014 Minimum [Member]	Jun. 30, 2014 Maximum [Member]
Note 9 - Commitments and Contingencies (Details) [Line Items]
Cancellable Open Purchase Order Arrangements	$ 3,200,000
Warranty and Product Performance Guarantees as Percentage of Total Sales Agreement						10.00%	30.00%
Warranty and Product Performance Guarantees Period						24 months	59 months
Letters of Credit Outstanding, Amount	5,000,000			2,700,000	2,300,000
Restricted Cash Used to Collateralize Irrevocable Standby Letters of Credit	5,200,000
Business Combination, Contingent Consideration, Liability		$ 1,300,000	$ 1,200,000

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Note 3 - Loss per Share (Details) - Antidilutive Securities Excluded from Computation of Diluted Earnings Per Share In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Employee Stock Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities	7,573	7,273	7,573	7,273
Warrant [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities	600	900	600	900

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Note 7 - Equity (Tables)

6 Months Ended

Jun. 30, 2014

Disclosure Text Block Supplement [Abstract]

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block]

	Three Months Ended June 30,				Six Months Ended June 30,
	2014		2013		2014		2013
Cost of revenue	$	26	$	18	$	48	$	39
General and administrative		365		307		694		814
Sales and marketing		155		120		308		235
Research and development		88		53		165		99
Total share-based compensation expense	$	634	$	498	$	1,215	$	1,187

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Note 10 - Business Segment and Geographic Information (Details) - Revenues by Geographic Area (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Note 10 - Business Segment and Geographic Information (Details) - Revenues by Geographic Area [Line Items]
Revenue (in Dollars)	$ 6,407		$ 8,569		$ 10,304		$ 14,942
Percentage revenue	100.00%		100.00%		100.00%		100.00%
Domestic [Member]
Note 10 - Business Segment and Geographic Information (Details) - Revenues by Geographic Area [Line Items]
Revenue (in Dollars)	235		468		584		1,763
International [Member]
Note 10 - Business Segment and Geographic Information (Details) - Revenues by Geographic Area [Line Items]
Revenue (in Dollars)	$ 6,172		$ 8,101		$ 9,720		$ 13,179
BAHAMAS
Note 10 - Business Segment and Geographic Information (Details) - Revenues by Geographic Area [Line Items]
Percentage revenue	14.00%		1.00%		10.00%			[1]
ISRAEL
Note 10 - Business Segment and Geographic Information (Details) - Revenues by Geographic Area [Line Items]
Percentage revenue	9.00%			[1]	10.00%			[1]
CHINA
Note 10 - Business Segment and Geographic Information (Details) - Revenues by Geographic Area [Line Items]
Percentage revenue	11.00%		10.00%		8.00%		7.00%
UNITED STATES
Note 10 - Business Segment and Geographic Information (Details) - Revenues by Geographic Area [Line Items]
Percentage revenue	4.00%		5.00%		6.00%		12.00%
GHANA
Note 10 - Business Segment and Geographic Information (Details) - Revenues by Geographic Area [Line Items]
Percentage revenue		[1]	10.00%			[1]	6.00%
SPAIN
Note 10 - Business Segment and Geographic Information (Details) - Revenues by Geographic Area [Line Items]
Percentage revenue	2.00%		15.00%		5.00%		10.00%
INDIA
Note 10 - Business Segment and Geographic Information (Details) - Revenues by Geographic Area [Line Items]
Percentage revenue	3.00%		15.00%		4.00%		14.00%
Others [Member]
Note 10 - Business Segment and Geographic Information (Details) - Revenues by Geographic Area [Line Items]
Percentage revenue	57.00%	[2]	44.00%	[2]	57.00%	[2]	51.00%	[2]

[1] Less than 1%

[2] Includes remaining countries not separately disclosed. No country in this line item accounted for more than 10% of our net revenue during the periods presented.

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Note 6 - Lines of Credit (Details) (USD $)			0 Months Ended				0 Months Ended			0 Months Ended	1 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Jun. 05, 2012 Adjusted LIBO Rate [Member] Revolving Loans [Member]	May 31, 2012 All Outstanding Letters of Credit [Member] The 2009 Agreement [Member]	Dec. 31, 2009 All Outstanding Letters of Credit [Member] The 2009 Agreement [Member]	Dec. 31, 2009 All Outstanding Advances [Member] The 2009 Agreement [Member]	Jun. 05, 2012 The 2012 Agreement [Member]	Jun. 30, 2014 The 2012 Agreement [Member]	Dec. 31, 2013 The 2012 Agreement [Member]	Jun. 05, 2012 Revolving Loans [Member] Prime Rate [Member]	Dec. 31, 2009 The 2009 Agreement [Member]	Jun. 30, 2014 The 2009 Agreement [Member]	Dec. 31, 2013 The 2009 Agreement [Member]
Note 6 - Lines of Credit (Details) [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity							$ 16,000,000				$ 16,000,000
Line of Credit Facility, Capacity Available for Trade Purchases							10,000,000				10,000,000
Debt Instrument, Basis Spread on Variable Rate			1.25%							0.00%	1.375%
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage							0.25%
Cash Collateral Balance Required by Credit Agreement				105.00%	101.00%	100.00%	101.00%
Letters of Credit Outstanding, Amount	5,000,000							2,300,000	1,300,000			2,700,000	3,600,000
Restricted Cash and Cash Equivalents	8,971,000	8,779,000						2,400,000	1,300,000
Line of Credit Facility, Capacity Available for Specific Purpose Other than for Trade Purchases											15,900,000
Restricted Cash and Cash Equivalents, Noncurrent	$ 2,894,000	$ 4,468,000										$ 2,800,000	$ 3,700,000

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Note 4 - Other Financial Information (Details) - Accumulated Other Comprehensive Loss (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	$ (43)		$ (43)		$ (107)
Net other comprehensive income	19	(27)	64	(33)
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(60)		(60)		(106)
Net other comprehensive income			46
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	17		17		(1)
Net other comprehensive income			$ 18

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Note 11 - Concentrations (Details) - Revenue Concentrations (Customer E [Member], Sales Revenue, Goods, Net [Member])	3 Months Ended			6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Customer E [Member] | Sales Revenue, Goods, Net [Member]
Concentration Risk [Line Items]
Customer E	14.00%		[1]		[1]		[1]

[1] Less than 10%.

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Note 9 - Commitments and Contingencies (Details) - Operating Lease Obligations (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014
Operating Lease Obligations [Abstract]
2014 (remaining six months)	$ 849
2015	1,539
2016	1,575
2017	1,567
2018	1,591
Thereafter	1,398
Total future minimum lease payments	$ 8,519

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Note 3 - Loss per Share

6 Months Ended

Jun. 30, 2014

Earnings Per Share [Abstract]

Earnings Per Share [Text Block]

Note 3 — Loss per Share

Basic and diluted net loss per share is based on the weighted average number of common shares outstanding during the period. Potential dilutive securities are excluded from the calculation of loss per share, as their inclusion would be anti-dilutive.

The following table shows the computation of basic and diluted loss per share (in thousands, except per share data):

	Three Months Ended June 30,						Six Months Ended June 30,
	2014			2013			2014			2013
Numerator:
Net loss	$	(4,611	)	$	(1,457	)	$	(8,294	)	$	(5,967	)
Denominator:
Basic and diluted weighted average common shares outstanding		51,566			51,026			51,506			51,004
Basic and diluted net loss per share	$	(0.09	)	$	(0.03	)	$	(0.16	)	$	(0.12	)

The following potential common shares were not considered in the computation of diluted loss per share because their effect would have been anti-dilutive (in thousands):

	Three months Ended June 30,				Six months Ended June 30,
	2014		2013		2014		2013
Stock options		7,573		7,273		7,573		7,273
Warrants		600		900		600		900

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Note 7 - Equity (Details) (USD $)	1 Months Ended	3 Months Ended	6 Months Ended		0 Months Ended	1 Months Ended
	Mar. 31, 2014	Jun. 30, 2014	Jun. 30, 2014	Feb. 28, 2014	Jul. 03, 2014 Subsequent Event [Member] Chief Financial Officer [Member]	Mar. 31, 2014 Certain Officers and Other Employees [Member]	Mar. 31, 2014 An Emloyee [Member]	Apr. 30, 2014 President and CEO [Member]	Jun. 30, 2014 Certain Employee [Member]
Note 7 - Equity (Details) [Line Items]
Stock Repurchase Program, Number of Shares Authorized to be Repurchased (in Shares)				3,000,000
Stock Repurchase Program, Authorized Amount (in Dollars)		$ 6,000,000	$ 6,000,000
Stock Repurchased During Period, Shares (in Shares)	115,300	0
Stock Repurchased During Period, Value (in Dollars)	633,000	0
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized (in Dollars)		$ 5,000,000	$ 5,000,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition			2 years 361 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures (in Shares)					100,000	957,000	10,000	440,000	50,000
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period					4 years	4 years	4 years	4 years	4 years
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in Dollars per share)					$ 4.91	$ 6.00	$ 5.32	$ 4.96	$ 5.91
Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Grants In Period, Expiration Period					10 years	10 years	10 years	10 years	10 years

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Note 12 - Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2014

Fair Value Disclosures [Abstract]

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

	June 30, 2014		Level 1 Inputs		Level 2 Inputs		Level 3 Inputs
Assets:
Short-term available-for-sale securities	$	10,421	$	—	$	10,421	$	—
Long-term available-for-sale securities		4,844		—		4,844		—
Total assets	$	15,265	$	—	$	15,265	$	—
Liabilities:
Contingent consideration*	$	1,535	$	—	$	—	$	1,535
Total liabilities	$	1,535	$	—	$	—	$	1,535

	December 31, 2013		Level 1 Inputs		Level 2 Inputs		Level 3 Inputs
Assets:
Short-term available-for-sale securities	$	5,856	$	—	$	5,856	$	—
Long-term available-for-sale securities		13,694		—		13,694		—
Total assets	$	19,550	$	—	$	19,550	$	—
Liabilities:
Contingent consideration*	$	1,524	$	—	$	—	$	1,524
Total liabilities	$	1,524	$	—	$	—	$	1,524

Fair Value, Assets and Liabilities Measured on Nonrecurring Basis, Valuation Techniques [Table Text Block]

As of June 30, 2014	Fair Value (in thousands)		Valuation Technique	Significant Unobservable Input	Range
Acquisition-related contingent consideration	$	1,535	Income approach	Probability of outcome	50 – 100%

Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

	Contingent Consideration
Balance, December 31, 2013	$	1,524
Loss due to change in value		11
Balance, June 30, 2014	$	1,535

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Note 11 - Concentrations (Tables)

6 Months Ended

Jun. 30, 2014

Accounts Receivable [Member]

Note 11 - Concentrations (Tables) [Line Items]

Schedules of Concentration of Risk, by Risk Factor [Table Text Block]

	June 30, 2014			December 31, 2013
Customer A		37	%		19	%
Customer B		*			16	%
Customer C		*			17	%
Customer D		*			14	%

Sales Revenue, Goods, Net [Member]

Note 11 - Concentrations (Tables) [Line Items]

Schedules of Concentration of Risk, by Risk Factor [Table Text Block]

	Three Months Ended June 30,					Six Months Ended June 30,
	2014			2013		2014		2013
Customer E		14	%		*		*		*

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Note 13 - Subsequent Events (Details) (Exercised for Shares in Lieu of Cash [Member], Subsequent Event [Member])	1 Months Ended
	Jul. 29, 2014
Exercised for Shares in Lieu of Cash [Member] | Subsequent Event [Member]
Note 13 - Subsequent Events (Details) [Line Items]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	400,000
Warrants Exercised during the Period	311,111
Warrants Cancelled and Considered Payment During the Period	88,889

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Note 7 - Equity (Details) - Share-based Compensation Expense (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Share based compensation expense	$ 634	$ 498	$ 1,215	$ 1,187
Cost of Sales [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Share based compensation expense	26	18	48	39
General and Administrative Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Share based compensation expense	365	307	694	814
Selling and Marketing Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Share based compensation expense	155	120	308	235
Research and Development Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Share based compensation expense	$ 88	$ 53	$ 165	$ 99

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Note 2 - Goodwill and Other Intangible Assets (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
Note 2 - Goodwill and Other Intangible Assets (Details) [Line Items]
Goodwill	$ 12,790,000	$ 12,790,000
Goodwill, Impaired, Accumulated Impairment Loss	0
	1,062,000	1,062,000
Trademarks from 2012 [Member]
Note 2 - Goodwill and Other Intangible Assets (Details) [Line Items]
	1,000,000
Patents from 2007 [Member]
Note 2 - Goodwill and Other Intangible Assets (Details) [Line Items]
	31,000
Patents from 2010 [Member]
Note 2 - Goodwill and Other Intangible Assets (Details) [Line Items]
	$ 11,000

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Note 2 - Goodwill and Other Intangible Assets (Details) - Identifiable Intangible Assets (USD $)	Jun. 30, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 11,485,000	$ 11,485,000
Accumulated Amortization	(6,846,000)	(6,415,000)
Accumulated Impairment Losses	(1,062,000)	(1,062,000)
Net Carrying Amount	3,577,000	4,008,000
Developed Technology Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	6,100,000	6,100,000
Accumulated Amortization	(2,796,000)	(2,491,000)
Net Carrying Amount	3,304,000	3,609,000
Noncompete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,310,000	1,310,000
Accumulated Amortization	(1,246,000)	(1,169,000)
Net Carrying Amount	64,000	141,000
Order or Production Backlog [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,300,000	1,300,000
Accumulated Amortization	(1,300,000)	(1,300,000)
Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,200,000	1,200,000
Accumulated Amortization	(180,000)	(180,000)
Accumulated Impairment Losses	(1,020,000)	(1,020,000)
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	990,000	990,000
Accumulated Amortization	(960,000)	(924,000)
Net Carrying Amount	30,000	66,000
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	585,000	585,000
Accumulated Amortization	(364,000)	(351,000)
Accumulated Impairment Losses	(42,000)	(42,000)
Net Carrying Amount	$ 179,000	$ 192,000

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Note 2 - Goodwill and Other Intangible Assets

6 Months Ended

Jun. 30, 2014

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets Disclosure [Text Block]

Note 2 — Goodwill and Other Intangible Assets

Goodwill as of June 30, 2014 and December 31, 2013 of $12.8 million was the result of our acquisition of Pump Engineering, LLC in December 2009. During the three and six months ended June 30, 2014, there were no changes in the recognized amount of goodwill.

The components of identifiable other intangible assets, all of which are finite-lived, as of the dates indicated were as follows (in thousands):

	June 30, 2014
	Gross Carrying Amount		Accumulated Amortization			Accumulated Impairment Losses			Net Carrying Amount
Developed technology	$	6,100	$	(2,796	)	$	—		$	3,304
Non-compete agreements		1,310		(1,246	)		—			64
Backlog		1,300		(1,300	)		—			—
Trademarks		1,200		(180	)		(1,020	)		—
Customer relationships		990		(960	)		—			30
Patents		585		(364	)		(42	)		179
Total	$	11,485	$	(6,846	)	$	(1,062	)	$	3,577

	December 31, 2013
	Gross Carrying Amount		Accumulated Amortization			Accumulated Impairment Losses			Net Carrying Amount
Developed technology	$	6,100	$	(2,491	)	$	—		$	3,609
Non-compete agreements		1,310		(1,169	)		—			141
Backlog		1,300		(1,300	)		—			—
Trademarks		1,200		(180	)		(1,020	)		—
Customer relationships		990		(924	)		—			66
Patents		585		(351	)		(42	)		192
Total	$	11,485	$	(6,415	)	$	(1,062	)	$	4,008

Accumulated impairment losses at June 30, 2014 include a $1.0 million impairment loss from 2012 for trademarks, a $31,000 loss for patents from 2007, and an $11,000 loss for patents from 2010.

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Note 3 - Loss per Share (Details) - Computation of Basic and Diluted Loss Per Share (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Numerator:
Net loss	$ (4,611)	$ (1,457)	$ (8,294)	$ (5,967)
Denominator:
Basic and diluted weighted average common shares outstanding	51,566	51,026	51,506	51,004
Basic and diluted net loss per share	$ (0.09)	$ (0.03)	$ (0.16)	$ (0.12)

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Note 5 - Investments (Details) - Gross Unrealized Losses and Fair Values of Investments (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Note 5 - Investments (Details) - Gross Unrealized Losses and Fair Values of Investments [Line Items]
Fair value, less than 12 months	$ 2,074	$ 4,919
Gross unrealized losses, less then 12 months	(2)	(17)
Fair value, 12 months or greater	1,028	524
Gross unrealized losses, 12 months or greater	(4)	(1)
Fair value, total	3,102	5,443
Gross unrealized losses, total	(6)	(18)
Corporate Debt Securities [Member]
Note 5 - Investments (Details) - Gross Unrealized Losses and Fair Values of Investments [Line Items]
Fair value, less than 12 months	2,074	4,919
Gross unrealized losses, less then 12 months	(2)	(17)
Fair value, 12 months or greater	1,028	524
Gross unrealized losses, 12 months or greater	(4)	(1)
Fair value, total	3,102	5,443
Gross unrealized losses, total	$ (6)	$ (18)

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Note 12 - Fair Value Measurements (Details) - Fair Value of Financial Assets and Liabilities Measured on a Recurring Basis (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014		Dec. 31, 2013
Note 12 - Fair Value Measurements (Details) - Fair Value of Financial Assets and Liabilities Measured on a Recurring Basis [Line Items]
Total assets	$ 15,265		$ 19,550
Liabilities:
Contingent consideration	1,535	[1]	1,524	[1]
Total liabilities	1,535		1,524
Fair Value, Inputs, Level 1 [Member]
Liabilities:
Contingent consideration		[1]		[1]
Fair Value, Inputs, Level 2 [Member] | Short-term Investments [Member]
Note 12 - Fair Value Measurements (Details) - Fair Value of Financial Assets and Liabilities Measured on a Recurring Basis [Line Items]
Available-for-sale securities	10,421		5,856
Fair Value, Inputs, Level 2 [Member] | Other Long-term Investments [Member]
Note 12 - Fair Value Measurements (Details) - Fair Value of Financial Assets and Liabilities Measured on a Recurring Basis [Line Items]
Available-for-sale securities	4,844		13,694
Fair Value, Inputs, Level 2 [Member]
Note 12 - Fair Value Measurements (Details) - Fair Value of Financial Assets and Liabilities Measured on a Recurring Basis [Line Items]
Total assets	15,265		19,550
Liabilities:
Contingent consideration		[1]		[1]
Fair Value, Inputs, Level 3 [Member]
Liabilities:
Contingent consideration	1,535	[1]	1,524	[1]
Total liabilities	1,535		1,524
Short-term Investments [Member]
Note 12 - Fair Value Measurements (Details) - Fair Value of Financial Assets and Liabilities Measured on a Recurring Basis [Line Items]
Available-for-sale securities	10,421		5,856
Other Long-term Investments [Member]
Note 12 - Fair Value Measurements (Details) - Fair Value of Financial Assets and Liabilities Measured on a Recurring Basis [Line Items]
Available-for-sale securities	$ 4,844		$ 13,694

[1] Included in Accrued Expenses and Other Current Liabilities and Other Non-Current Liabilities.

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Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 16,447	$ 14,371
Restricted cash	6,077	4,311
Short-term investments	10,421	5,856
Accounts receivable, net of allowance for doubtful accounts of $247and $241 at June 30, 2014 and December 31, 2013, respectively	9,372	15,222
Unbilled receivables	1,358	5,442
Inventories	9,595	4,955
Deferred tax assets, net	698	698
Prepaid expenses and other current assets	1,232	1,018
Total current assets	55,200	51,873
Restricted cash, non-current	2,894	4,468
Unbilled receivables, non-current		1,197
Long-term investments	4,844	13,694
Property and equipment, net of accumulated depreciation of $13,651 and $12,082 at June 30, 2014 and December 31, 2013, respectively	14,475	13,903
Goodwill	12,790	12,790
Other intangible assets, net	3,577	4,008
Other assets, non-current	2	2
Total assets	93,782	101,935
Current liabilities:
Accounts payable	1,801	1,209
Accrued expenses and other current liabilities	5,610	7,963
Income taxes payable	27	22
Accrued warranty reserve	705	709
Deferred revenue	1,031	779
Total current liabilities	9,174	10,682
Deferred tax liabilities, non-current, net	2,242	2,131
Deferred revenue, non-current	31	130
Other non-current liabilities	1,925	2,077
Total liabilities	13,372	15,020
Commitments and Contingencies (Note 9)
Stockholders’ equity:
Preferred stock, $0.001 par value; 10,000,000 shares authorized; no shares issued or outstanding
Common stock, $0.001 par value; 200,000,000 shares authorized; 53,595,051 and 51,697,148 shares issued and outstanding at June 30, 2014, respectively; and 53,136,704 and 51,354,101 shares issued and outstanding at December 31, 2013, respectively	54	53
Additional paid-in capital	122,289	119,932
Accumulated other comprehensive loss	(43)	(107)
Treasury stock, at cost, 1,897,903 and 1,782,603 shares repurchased at June 30, 2014 and December 31, 2013, respectively	(4,633)	(4,000)
Accumulated deficit	(37,257)	(28,963)
Total stockholders’ equity	80,410	86,915
Total liabilities and stockholders’ equity	$ 93,782	$ 101,935

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Note 8 - Income Taxes (Details) (USD $)	3 Months Ended	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Effective Income Tax Rate Reconciliation, Percent		1.50%	3.90%
Deferred Tax Assets, Valuation Allowance				$ 13,400,000
Deferred Income Tax Expense (Benefit)	0	0
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	$ 0	$ 0

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Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Cash Flows From Operating Activities
Net loss	$ (8,294)	$ (5,967)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	1,998	1,829
Loss on disposal of fixed assets		19
Non-cash restructuring charges		44
Amortization of premiums/discounts on investments	239	171
Share-based compensation	1,215	1,187
Loss on foreign currency transactions	41	31
Deferred income taxes	111	111
Provision for doubtful accounts	126	134
Provision for warranty claims	48	138
Valuation adjustments for excess or obsolete inventory	43	(60)
Other non-cash adjustments	(153)	(58)
Changes in operating assets and liabilities:
Accounts receivable	5,724	2,629
Unbilled receivables	5,281	3,591
Inventories	(4,683)	(2,253)
Prepaid and other assets	(213)	41
Accounts payable	610	(781)
Accrued expenses and other liabilities	(2,443)	(3,190)
Income taxes payable	4	10
Deferred revenue	153	(230)
Net cash used in operating activities	(193)	(2,604)
Cash Flows From Investing Activities
Capital expenditures	(2,140)	(866)
Purchase of marketable securities		(8,570)
Maturities of marketable securities	4,065	6,450
Restricted cash	(192)	119
Net cash provided by (used in) investing activities	1,733	(2,867)
Cash Flows From Financing Activities
Repayment of capital lease obligation		(18)
Net proceeds from issuance of common stock	1,138	230
Repurchase of common stock for treasury	(633)
Net cash provided by financing activities	505	212
Effect of exchange rate differences on cash and cash equivalents	31	(33)
Net change in cash and cash equivalents	2,076	(5,292)
Cash and cash equivalents, beginning of period	14,371	16,642
Cash and cash equivalents, end of period	$ 16,447	$ 11,350

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Note 4 - Other Financial Information (Details) - Inventories (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Inventories [Abstract]
Raw materials	$ 3,542	$ 2,431
Work in process	2,761	1,427
Finished goods	3,292	1,097
Inventories	$ 9,595	$ 4,955

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Note 3 - Loss per Share (Tables)

6 Months Ended

Jun. 30, 2014

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

	Three Months Ended June 30,						Six Months Ended June 30,
	2014			2013			2014			2013
Numerator:
Net loss	$	(4,611	)	$	(1,457	)	$	(8,294	)	$	(5,967	)
Denominator:
Basic and diluted weighted average common shares outstanding		51,566			51,026			51,506			51,004
Basic and diluted net loss per share	$	(0.09	)	$	(0.03	)	$	(0.16	)	$	(0.12	)

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]

	Three months Ended June 30,				Six months Ended June 30,
	2014		2013		2014		2013
Stock options		7,573		7,273		7,573		7,273
Warrants		600		900		600		900

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Note 4 - Other Financial Information (Details) - Accrued Expenses and Other Current Liabilities (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Note 4 - Other Financial Information (Details) - Accrued Expenses and Other Current Liabilities [Line Items]
Payroll and commissions payable	$ 2,877	$ 4,857
Other accrued expenses and current liabilities	1,285	1,503
Accrued expenses and other current liabilities	5,610	7,963
Other Current Liabilities [Member]
Note 4 - Other Financial Information (Details) - Accrued Expenses and Other Current Liabilities [Line Items]
Contingent consideration (current portion) and legal expenses	$ 1,448	$ 1,603

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Note 5 - Investments (Tables)

6 Months Ended

Jun. 30, 2014

Investments Schedule [Abstract]

Available-for-sale Securities [Table Text Block]

	June 30, 2014
	Amortized Cost		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses			Fair Value
Short-term investments:
State and local government obligations	$	973	$	1	$	—		$	974
Corporate notes and bonds		9,431		18		(2	)		9,447
Total short-term investments	$	10,404	$	19	$	(2	)	$	10,421
Long-term investments:
Corporate notes and bonds	$	4,843	$	5	$	(4	)	$	4,844
Total long-term investments	$	4,843	$	5	$	(4	)	$	4,844
Total available-for-sale securities	$	15,247	$	24	$	(6	)	$	15,265

	December 31, 2013
	Amortized Cost		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses			Fair Value
Short-term investments:
State and local government obligations		2,113		3		—			2,116
Corporate notes and bonds		3,739		2		(1	)		3,740
Total short-term investments	$	5,852	$	5	$	(1	)	$	5,856
Long-term investments:
State and local government obligations		227		1		—			228
Corporate notes and bonds		13,472		11		(17	)		13,466
Total long-term investments	$	13,699	$	12	$	(17	)	$	13,694
Total available-for-sale securities	$	19,551	$	17	$	(18	)	$	19,550

Schedule of Unrealized Loss on Investments [Table Text Block]

	June 30, 2014
	Less than 12 months					12 months or greater					Total
	Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses
Corporate notes and bonds	$	2,074	$	(2	)	$	1,028	$	(4	)	$	3,102	$	(6	)
Total	$	2,074	$	(2	)	$	1,028	$	(4	)	$	3,102	$	(6	)

	December 31, 2013
	Less than 12 months					12 months or greater					Total
	Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses
Corporate notes and bonds	$	4,919	$	(17	)	$	524	$	(1	)	$	5,443	$	(18	)
Total	$	4,919	$	(17	)	$	524	$	(1	)	$	5,443	$	(18	)

Schedule of Available-for-sale Securities Reconciliation [Table Text Block]

	June 30,2014
	Amortized Cost		Fair Value
Due in one year or less	$	—	$	—
Due after one year through three years		15,247		15,265
Total available-for-sale securities	$	15,247	$	15,265

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Note 1 - The Company and Summary of Significant Accounting Policies

6 Months Ended

Jun. 30, 2014

Accounting Policies [Abstract]

Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block]

Note 1 — The Company and Summary of Significant Accounting Policies

The Company

Energy Recovery, Inc. (the “Company”, “Energy Recovery”, “we”, “our”, or “us”) designs, develops, manufactures, and sells energy recovery devices that transform untapped energy into reusable energy from industrial fluid flows and pressure cycles. Our products are marketed and sold in fluid flow markets, such as desalination and oil and gas, under the trademarks ERI^®, PX^®, Pressure Exchanger^®, PX Pressure Exchanger^®, IsoBoost^™, IsoGen^™, and IsoPro^™. Our products are developed and manufactured in the United States of America (“U.S.”) at our headquarters in San Leandro, California. We also have sales offices in Madrid, Spain; Dubai, United Arab Emirates; and Shanghai, Peoples Republic of China.

Use of Estimates

The preparation of condensed consolidated financial statements in conformity with U.S. generally accepted accounting principles (“U.S. GAAP”) requires our management to make judgments, assumptions, and estimates that affect the amounts reported in the condensed consolidated financial statements and accompanying notes. Our more significant estimates and judgments that we believe are the most critical to aid in fully understanding and evaluating our reported financial results are revenue recognition; allowance for doubtful accounts; allowance for product warranty; valuation of stock options; valuation and impairment of goodwill, long-lived assets, and acquired intangible assets; useful lives for depreciation and amortization; valuation adjustments for excess and obsolete inventory; deferred taxes and valuation allowances on deferred tax assets; and evaluation and measurement of contingencies, including contingent consideration. Actual results could differ materially from those estimates.

Basis of Presentation

The condensed consolidated financial statements include the accounts of Energy Recovery, Inc. and its wholly-owned subsidiaries. All significant intercompany accounts and transactions have been eliminated.

The accompanying condensed consolidated financial statements have been prepared by us, without audit, 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 U.S. GAAP have been condensed or omitted pursuant to such rules and regulations. The December 31, 2013 condensed consolidated balance sheet was derived from audited financial statements, and may not include all disclosures required by U.S. GAAP; however, we believe that the disclosures are adequate to make the information presented not misleading. These unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and the notes thereto for the fiscal year ended December 31, 2013 included in our Annual Report on Form 10-K filed with the SEC on March 11, 2014.

In the opinion of management, all adjustments, consisting of only normal recurring adjustments that are necessary to present fairly the financial position, results of operations, and cash flows for the interim periods, have been made. The results of operations for the interim periods are not necessarily indicative of the operating results for the full fiscal year or any future periods.

Change in Method of Accounting for Inventory Valuation

Prior to January 1, 2014, inventories were stated at the lower of cost (using the weighted average cost method) or market. Effective January 1, 2014, with the final implementation of our new enterprise resource planning (“ERP”) system, we changed our method of accounting for inventories to the first-in, first-out (“FIFO”) method. We believe that the change is preferable, as the FIFO method better reflects the current value of inventories and provides more accurate matching of manufacturing costs and revenues. Due to the limited capabilities of our former ERP system, we determined that it was impracticable to retrospectively apply the FIFO costing method to prior periods. As such, prior period consolidated financial statements have not been retroactively adjusted. The cumulative effect of this change was not material.

Recent Accounting Pronouncements

On May 28, 2014, the Financial Accounting Standards Board issued Accounting Standards Update (“ASU”) 2014-09, Revenue from Contracts with Customers. The amendment requires an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. ASU 2014-09 will replace most existing revenue recognition guidance in U.S. GAAP when it becomes effective. ASU 2014-09 is effective for annual reporting periods beginning after December 15, 2016, including interim periods within that reporting period, which is January 1, 2017 for us. Early application is not permitted. ASU 2014-09 permits the use of either the retrospective or cumulative effect transition method. We are evaluating the effect that ASU 2014-09 will have on our consolidated financial statements and related disclosures. We have not yet selected a transition method nor have we determined the effect of the standard on our ongoing financial reporting.

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Condensed Consolidated Balance Sheets (Unaudited) (Parentheticals) (USD $) In Thousands, except Share data, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Allowance for doubtful accounts (in Dollars)	$ 247	$ 241
Property and equipment, accumulated depreciation (in Dollars)	$ 13,651	$ 12,082
Preferred stock, par value (in Dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value (in Dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	53,595,051	53,136,704
Common stock, shares outstanding	51,697,148	51,354,101
Treasury stock, at cost, shares	1,897,903	1,782,603

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Note 11 - Concentrations

6 Months Ended

Jun. 30, 2014

Risks and Uncertainties [Abstract]

Concentration Risk Disclosure [Text Block]

Note 11 — Concentrations

Customers accounting for 10% or more of our accounts receivable and unbilled receivables were as follows:

	June 30, 2014			December 31, 2013
Customer A		37	%		19	%
Customer B		*			16	%
Customer C		*			17	%
Customer D		*			14	%

*     Less than 10%.

Revenue from customers representing 10% or more of net revenue varies from period to period. For the periods indicated, customers representing 10% or more of net revenue were:

	Three Months Ended June 30,					Six Months Ended June 30,
	2014			2013		2014		2013
Customer E		14	%		*		*		*

*     Less than 10%.

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Document And Entity Information	6 Months Ended
	Jun. 30, 2014	Aug. 01, 2014
Document and Entity Information [Abstract]
Entity Registrant Name	Energy Recovery, Inc.
Document Type	10-Q
Current Fiscal Year End Date	--12-31
Entity Common Stock, Shares Outstanding		52,008,259
Amendment Flag	false
Entity Central Index Key	0001421517
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Accelerated Filer
Entity Well-known Seasoned Issuer	Yes
Document Period End Date	Jun. 30, 2014
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	Q2

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Note 12 - Fair Value Measurements

6 Months Ended

Jun. 30, 2014

Fair Value Disclosures [Abstract]

Fair Value Disclosures [Text Block]

Note 12 — Fair Value Measurements

The authoritative guidance for measuring fair value provides a hierarchy that prioritizes the inputs to valuation techniques used in measuring fair value as follows:

Level 1 — Quoted prices (unadjusted) in active markets for identical assets or liabilities;

Level 2 — Inputs other than quoted prices included within Level 1 that are either directly or indirectly observable; and

Level 3 — Unobservable inputs in which little or no market activity exists, therefore requiring an entity to develop its own assumptions that market participants would use in pricing.

The carrying values of cash and cash equivalents, restricted cash, accounts receivable, unbilled receivables, accounts payable, and other accrued expenses approximate fair value due to the short-term maturity of those instruments. For our investments in available-for-sale securities, if quoted prices in active markets for identical investments are not available to determine fair value (Level 1), then we use quoted prices for similar assets or inputs other than quoted prices that are observable either directly or indirectly (Level 2). The investments included in Level 2 consist primarily of certificates of deposits; commercial paper; and municipal, corporate, and agency obligations. The carrying amount of the contingent consideration arising from our acquisition of Pump Engineering, LLC is measured at fair value on a recurring basis using unobservable inputs in which little or no market activity exists (Level 3). The estimated fair value of the contingent consideration is determined based entirely on management’s assessment of the weighted probability of payment under various scenarios.

The fair value of financial assets and liabilities measured on a recurring basis for the indicated periods was as follows (in thousands):

	June 30, 2014		Level 1 Inputs		Level 2 Inputs		Level 3 Inputs
Assets:
Short-term available-for-sale securities	$	10,421	$	—	$	10,421	$	—
Long-term available-for-sale securities		4,844		—		4,844		—
Total assets	$	15,265	$	—	$	15,265	$	—
Liabilities:
Contingent consideration*	$	1,535	$	—	$	—	$	1,535
Total liabilities	$	1,535	$	—	$	—	$	1,535

	December 31, 2013		Level 1 Inputs		Level 2 Inputs		Level 3 Inputs
Assets:
Short-term available-for-sale securities	$	5,856	$	—	$	5,856	$	—
Long-term available-for-sale securities		13,694		—		13,694		—
Total assets	$	19,550	$	—	$	19,550	$	—
Liabilities:
Contingent consideration*	$	1,524	$	—	$	—	$	1,524
Total liabilities	$	1,524	$	—	$	—	$	1,524

*     Included in Accrued Expenses and Other Current Liabilities and Other Non-Current Liabilities.

The following table presents quantitative information about the inputs and valuation methodologies used for our fair value measurements classified as Level 3 of the fair value hierarchy as of June 30, 2014:

As of June 30, 2014	Fair Value (in thousands)		Valuation Technique	Significant Unobservable Input	Range
Acquisition-related contingent consideration	$	1,535	Income approach	Probability of outcome	50 – 100%

The reconciliation of the beginning and ending balances for assets and liabilities measured on a recurring basis using significant unobservable inputs (Level 3) for the period ended June 30, 2014 was as follows (in thousands):

	Contingent Consideration
Balance, December 31, 2013	$	1,524
Loss due to change in value		11
Balance, June 30, 2014	$	1,535

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Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Net revenue	$ 6,407	$ 8,569	$ 10,304	$ 14,942
Cost of revenue	3,332	3,293	4,984	6,649
Gross profit	3,075	5,276	5,320	8,293
Operating expenses:
General and administrative	2,995	3,326	5,034	7,496
Sales and marketing	2,702	1,859	5,197	3,870
Research and development	1,724	1,137	2,958	2,219
Amortization of intangibles assets	215	231	430	461
Restructuring charges		44		44
Total operating expenses	7,636	6,597	13,619	14,090
Loss from operations	(4,561)	(1,321)	(8,299)	(5,797)
Other non-operating income, net of expenses	8	25	129	52
Loss before income taxes	(4,553)	(1,296)	(8,170)	(5,745)
Provision for income taxes	58	161	124	222
Net loss	$ (4,611)	$ (1,457)	$ (8,294)	$ (5,967)
Basic and diluted net loss per share (in Dollars per share)	$ (0.09)	$ (0.03)	$ (0.16)	$ (0.12)
Shares used in basic and diluted per share calculation (in Shares)	51,566	51,026	51,506	51,004

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Note 6 - Lines of Credit

6 Months Ended

Jun. 30, 2014

Disclosure Text Block Supplement [Abstract]

Debt and Capital Leases Disclosures [Text Block]

Note 6 — Lines of Credit

Lines of Credit

In June 2012, we entered into a loan agreement (the “2012 Agreement”) with a financial institution. The 2012 Agreement provides for a total available credit line of $16.0 million. Under the 2012 Agreement, we are allowed to draw advances not to exceed, at any time, $10.0 million as revolving loans. The total stand-by letters of credit issued under the 2012 Agreement may not exceed the lesser of the $16.0 million credit line or the credit line minus all outstanding revolving loans. At no time may the aggregate of the revolving loans and stand-by letters of credit exceed the total available credit line of $16.0 million. Revolving loans may be in the form of a base rate loan that bears interest equal to the prime rate plus 0% or a Eurodollar loan that bears interest equal to the adjusted LIBOR plus 1.25%. Stand-by letters of credit are subject to customary fees and expenses for issuance or renewal. The unused portion of the credit facility is subject to a facility fee in an amount equal to 0.25% per annum of the average unused portion of the revolving line. The 2012 Agreement also requires us to maintain a cash collateral balance equal to 101% of all outstanding advances and all outstanding stand-by letters of credit collateralized by the line of credit. The 2012 Agreement matures in June 2015 and is collateralized by substantially all of our assets. As of June 30, 2014 and December 31, 2013, there were no advances drawn under the 2012 Agreement. Stand-by letters of credit collateralized under the 2012 Agreement totaled $2.3 million and $1.3 million as of June 30, 2014 and December 31, 2013, respectively. Total cash restricted related to these stand-by letters of credit totaled $2.4 million and $1.3 million as of June 30, 2014 and December 31, 2013, respectively.

We are subject to certain financial and administrative covenants under the 2012 Agreement. As of June 30, 2014, we were in compliance with these covenants.

In 2009, we entered into a loan and security agreement (the “2009 Agreement”) with another financial institution. The 2009 Agreement, as amended, provided a total available credit line of $16.0 million. Under the 2009 Agreement, we were allowed to draw advances of up to $10.0 million on a revolving line of credit or utilize up to $15.9 million as collateral for stand-by letters of credit, provided that the aggregate of the outstanding advances and collateral did not exceed the total available credit line of $16.0 million. Advances under the revolving line of credit incurred interest based on a prime rate index or LIBOR plus 1.375%. The 2009 Agreement, as amended, also required us to maintain cash collateral balances equal to at least 101% of the face amount of all outstanding stand-by letters of credit collateralized by the line of credit and 100% of the amount of all outstanding advances. The 2009 Agreement expired at the end of May 2012, at which time we became required to maintain a cash collateral balance equal to at least 105% of the face amount of all outstanding stand-by letters of credit collateralized by the line of credit. There were no advances drawn under the 2009 Agreement’s credit line at the time it expired. Remaining stand-by letters of credit issued under the 2009 Agreement totaled $2.7 million and $3.6 million as of June 30, 2014 and December 31, 2013, respectively. Total cash restricted related to these stand-by letters of credit totaled $2.8 million and $3.7 million as of June 30, 2014 and December 31, 2013, respectively.

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Note 5 - Investments

6 Months Ended

Jun. 30, 2014

Investments Schedule [Abstract]

Investment [Text Block]

Note 5 — Investments

Our short-term and long-term investments are all classified as available-for-sale. There were no sales of available-for-sale securities during the three and six months ended June 30, 2014.

Available-for-sale securities as of the dates indicated consisted of the following (in thousands):

	June 30, 2014
	Amortized Cost		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses			Fair Value
Short-term investments:
State and local government obligations	$	973	$	1	$	—		$	974
Corporate notes and bonds		9,431		18		(2	)		9,447
Total short-term investments	$	10,404	$	19	$	(2	)	$	10,421
Long-term investments:
Corporate notes and bonds	$	4,843	$	5	$	(4	)	$	4,844
Total long-term investments	$	4,843	$	5	$	(4	)	$	4,844
Total available-for-sale securities	$	15,247	$	24	$	(6	)	$	15,265

	December 31, 2013
	Amortized Cost		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses			Fair Value
Short-term investments:
State and local government obligations		2,113		3		—			2,116
Corporate notes and bonds		3,739		2		(1	)		3,740
Total short-term investments	$	5,852	$	5	$	(1	)	$	5,856
Long-term investments:
State and local government obligations		227		1		—			228
Corporate notes and bonds		13,472		11		(17	)		13,466
Total long-term investments	$	13,699	$	12	$	(17	)	$	13,694
Total available-for-sale securities	$	19,551	$	17	$	(18	)	$	19,550

Gross unrealized losses and fair values of our investments in an unrealized loss position as of the dates indicated, aggregated by investment category and length of time that the security has been in a continuous loss position, were as follows (in thousands):

	June 30, 2014
	Less than 12 months					12 months or greater					Total
	Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses
Corporate notes and bonds	$	2,074	$	(2	)	$	1,028	$	(4	)	$	3,102	$	(6	)
Total	$	2,074	$	(2	)	$	1,028	$	(4	)	$	3,102	$	(6	)

	December 31, 2013
	Less than 12 months					12 months or greater					Total
	Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses
Corporate notes and bonds	$	4,919	$	(17	)	$	524	$	(1	)	$	5,443	$	(18	)
Total	$	4,919	$	(17	)	$	524	$	(1	)	$	5,443	$	(18	)

Expected maturities can differ from contractual maturities because borrowers may have the right to prepay obligations without prepayment penalties. The amortized cost and fair value of available-for-sale securities that had stated maturities as of June 30, 2014 are shown below by contractual maturity (in thousands):

	June 30,2014
	Amortized Cost		Fair Value
Due in one year or less	$	—	$	—
Due after one year through three years		15,247		15,265
Total available-for-sale securities	$	15,247	$	15,265

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Note 4 - Other Financial Information (Tables)

6 Months Ended

Jun. 30, 2014

Disclosure Text Block Supplement [Abstract]

Schedule of Restricted Cash and Cash Equivalents [Table Text Block]

	June 30, 2014		December 31, 2013
Contingent and other consideration for acquisition	$	2,504	$	2,504
Collateral for stand-by letters of credit		3,258		1,492
Collateral for credit cards		315		315
Current restricted cash	$	6,077	$	4,311
Contingent and other consideration for acquisition	$	1,000	$	1,000
Collateral for stand-by letters of credit		1,894		3,468
Non-current restricted cash	$	2,894	$	4,468
Total restricted cash	$	8,971	$	8,779

Schedule of Inventory, Current [Table Text Block]

	June 30, 2014		December 31, 2013
Raw materials	$	3,542	$	2,431
Work in process		2,761		1,427
Finished goods		3,292		1,097
Inventories	$	9,595	$	4,955

Schedule of Accrued Liabilities [Table Text Block]

	June 30, 2014		December 31, 2013
Payroll and commissions payable	$	2,877	$	4,857
Contingent consideration (current portion) and legal expenses		1,448		1,603
Other accrued expenses and current liabilities		1,285		1,503
Accrued expenses and other current liabilities	$	5,610	$	7,963

Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

	Foreign Currency Translation Adjustments			Unrealized Gains (Losses) on Investments			Total Accumulated Other Comprehensive Loss
Balance, December 31, 2013	$	(106	)	$	(1	)	$	(107	)
Net other comprehensive income		46			18			64
Balance, June 30, 2014	$	(60	)	$	17		$	(43	)

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Note 13 - Subsequent Events

6 Months Ended

Jun. 30, 2014

Subsequent Events [Abstract]

Subsequent Events [Text Block]

Note 13 — Subsequent Events

See Note 7 – “Equity”, for discussion of options granted in July 2014.

On July 29, 2014, warrants to purchase 400,000 shares of common stock were exercised for 311,111 shares in lieu of cash proceeds. The remaining 88,889 warrants were cancelled and considered payment for the exercise.

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Note 9 - Commitments and Contingencies

6 Months Ended

Jun. 30, 2014

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies Disclosure [Text Block]

Note 9 — Commitments and Contingencies

Operating Lease Obligations

We lease facilities under fixed non-cancellable operating leases that expire on various dates through November 2019. Future minimum lease payments consist of the following (in thousands):

	June 30, 2014
2014 (remaining six months)	$	849
2015		1,539
2016		1,575
2017		1,567
2018		1,591
Thereafter		1,398
Total future minimum lease payments	$	8,519

Product Warranty

The following table summarizes the activity related to the product warranty liability during the three and six months ended June 30, 2014 and 2013 (in thousands):

	Three Months Ended June 30,						Six Months Ended June 30,
	2014			2013			2014			2013
Balance, beginning of period	$	705		$	1,256		$	709		$	1,172
Warranty costs charged to cost of revenue		50			41			53			138
Change in estimate		—			(132	)		—			(132	)
Utilization of warranty		(50	)		(138	)		(57	)		(151	)
Balance, end of period	$	705		$	1,027		$	705		$	1,027

Purchase Obligations

We enter into purchase order arrangements with our vendors. As of June 30, 2014, there were open purchase orders for which we had not yet received the related goods or services. These arrangements are subject to change based on our sales demand forecasts, and we have the right to cancel the arrangements prior to the date of delivery. As of June 30, 2014, we had approximately $3.2 million of cancellable open purchase order arrangements related primarily to materials and parts.

Guarantees 

We enter into indemnification provisions under our agreements with other companies in the ordinary course of business, typically with customers. Under these provisions, we generally indemnify and hold harmless the indemnified party for losses suffered or incurred by the indemnified party as a result of our activities, generally limited to personal injury and property damage caused by our employees at a customer’s desalination plant in proportion to the employee’s percentage of fault for the accident. Damages incurred for these indemnifications would be covered by our general liability insurance to the extent provided by the policy limitations. We have not incurred material costs to defend lawsuits or settle claims related to these indemnification agreements. As a result, the estimated fair value of these agreements is not material. Accordingly, we have no liabilities recorded for these agreements as of June 30, 2014 and December 31, 2013.

In certain cases, we issue warranty and product performance guarantees to our customers for amounts ranging from 10% to 30% of the total sales agreement to endorse the execution of product delivery and the warranty of design work, fabrication, and operating performance. These guarantees, generally in the form of stand-by letters of credit or bank guarantees secured by stand-by letters of credit, typically remain in place for periods ranging up to 24 months and in some cases up to 59 months, and relate to the underlying product warranty period. The stand-by letters of credit are collateralized by restricted cash and our credit facility. Of the $5.0 million in outstanding stand-by letters of credit at June 30, 2014, $2.7 million was issued under the 2009 Agreement and $2.3 million was issued under the 2012 Agreement. The stand-by letters of credit outstanding at June 30, 2014 were collateralized by restricted cash of $5.2 million.

Litigation

Note 9 – Commitments and Contingencies, under the caption “Litigation” of our Annual Report on Form 10-K filed with the SEC on March 11, 2014, provides information on certain litigation in which we are involved. Unfavorable rulings, judgments, or settlement terms regarding these litigation matters could have a material adverse impact on our business, financial condition, results of operations, and cash flows. Although none of the litigation matters can be quantified with absolute certainty, we have established accruals covering exposure and relating to contingencies to the extent that they are reasonably estimable and probable based on available facts.

On March 28, 2014, in the matter entitled “Roy Radakovich, as representative on behalf of former shareholders of Pump Engineering, LLC v. Energy Recovery, Inc.,” in the U.S. District Court for the Eastern District of Michigan (Southern Division), the Court granted summary judgment in favor of the Company on Claim I of the complaint (achieving certain minimum product energy efficiency metrics ($1.3 million)), but denied summary judgment on Claim II of the complaint (meeting certain product delivery time schedules ($1.2 million)). The Company made a small change in its accrued liability related to this matter to reflect this ruling. The parties are mediating the issues in dispute.

We were a defendant in a lawsuit filed by one of our competitors on October 4, 2013, entitled “Fluid Equipment Development Co., LLC, d/b/a/ FEDCO of Michigan v. Energy Recovery, Inc.” in the U.S. District Court for the Eastern District of Michigan (Southern Division). The complaint alleged, among other things, false advertising under federal and Michigan state statutes based on claims made by us related to certain of our products. The Plaintiffs sought injunctive relief and unspecified damages, attorney’s fees, and litigation costs. On May 20, 2014 the Court dismissed the complaint without prejudice.

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Note 7 - Equity

6 Months Ended

Jun. 30, 2014

Disclosure Text Block Supplement [Abstract]

Shareholders' Equity and Share-based Payments [Text Block]

Note 7 — Equity

Stock Repurchase Program

In February 2014, our Board of Directors authorized a stock repurchase program under which up to three million shares, not to exceed $6.0 million in aggregate cost, of our outstanding common stock could be repurchased through December 31, 2014 at the discretion of management. We account for treasury stock using the cost method. Cost includes fees charged in connection with acquiring the treasury stock. In March 2014, 115,300 shares at an aggregate cost of $633,000 were repurchased under this authorization. There were no repurchases under this authorization during the three months ended June 30, 2014.

Share-Based Compensation Expense

For the three and six months ended June 30, 2014 and 2013, we recognized share-based compensation expense related to employees and consultants as follows (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2014		2013		2014		2013
Cost of revenue	$	26	$	18	$	48	$	39
General and administrative		365		307		694		814
Sales and marketing		155		120		308		235
Research and development		88		53		165		99
Total share-based compensation expense	$	634	$	498	$	1,215	$	1,187

As of June 30, 2014, total unrecognized compensation cost related to non-vested share-based awards, net of estimated forfeitures, was $5.0 million, which is expected to be recognized as expense over a weighted average period of approximately 2.99 years.

In March 2014, we granted 957,000 stock options to certain officers and other employees. The options vest over a four-year period, have an exercise price of $6.00 per share, and expire 10 years from the grant date.

Also, in March 2014, we granted 10,000 stock options to an employee. The options vest over a four-year period, have an exercise price of $5.32 per share, and expire 10 years from the grant date.

In April 2014, we granted 440,000 stock options to our President and Chief Executive Officer in lieu of his participation in the 2014 cash incentive plan. The options vest over a four-year period, have an exercise price of $4.96 per share, and expire 10 years from the grant date.

In June 2014, we granted 50,000 stock options to a certain employee as part of the offer letter of employment. The options vest over a four-year period, have an exercise price of $5.91 per share, and expire 10 years from the grant date.

On July 3, 2014, we granted 100,000 stock options to our new Chief Financial Officer as part of his promotion. The options vest over a four-year period, have an exercise price of $4.91 per share, and expire 10 years from the grant date.

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Note 8 - Income Taxes

6 Months Ended

Jun. 30, 2014

Income Tax Disclosure [Abstract]

Income Tax Disclosure [Text Block]

Note 8 — Income Taxes

The effective tax rate for the six months ended June 30, 2014 and 2013 was (1.5%) and (3.9%), respectively. As of December 31, 2013, a valuation allowance of approximately $13.4 million was established to reduce our deferred income tax assets to the amount expected to be realized. As such, no tax benefit related to our pre-tax loss was recognized for the three or six months ended June 30, 2014, as there was no change in our assessment of the amount of deferred income tax assets expected to be realized.

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Note 10 - Business Segment and Geographic Information

6 Months Ended

Jun. 30, 2014

Segment Reporting [Abstract]

Segment Reporting Disclosure [Text Block]

Note 10 — Business Segment and Geographic Information

We manufacture and sell high-efficiency energy recovery devices and pumps as well as related services under one reportable segment. Our chief operating decision-maker is the chief executive officer (“CEO”). The CEO reviews financial information presented on a consolidated basis for purposes of making operating decisions and assessing financial performance. Accordingly, we have concluded that we have one reportable segment.

The following geographic information includes net revenue to our domestic and international customers based on the customers’ requested delivery locations, except for certain cases in which the customer directed us to deliver our products to a location that differs from the known ultimate location of use. In such cases, the ultimate location of use, rather than the delivery location, is reflected in the table below (in thousands, except percentages):

	Three Months Ended June 30,						Six Months Ended June 30,
	2014			2013			2014			2013
Domestic revenue	$	235		$	468		$	584		$	1,763
International revenue		6,172			8,101			9,720			13,179
Total revenue	$	6,407		$	8,569		$	10,304		$	14,942
Revenue by country:
Bahamas		14	%		1	%		10	%		*	%
Israel		9			*			10			*
China		11			10			8			7
United States		4			5			6			12
Ghana		*			10			*			6
Spain		2			15			5			10
India		3			15			4			14
Others **		57			44			57			51
Total		100	%		100	%		100	%		100	%

 *Less than 1%

 **Includes remaining countries not separately disclosed. No country in this line item accounted for more than 10% of our net revenue during the periods presented.

All of our long-lived assets were located in the United States at June 30, 2014 and December 31, 2013.

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Note 4 - Other Financial Information (Details) - Restricted Cash (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Restricted Cash and Cash Equivalents Items [Line Items]
Current restricted cash	$ 6,077	$ 4,311
Non-current restricted cash	2,894	4,468
Total restricted cash	8,971	8,779
Contingent and Other Consideration for Acquisition [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Current restricted cash	2,504	2,504
Non-current restricted cash	1,000	1,000
Collateral for Stand-by Letters of Credit [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Current restricted cash	3,258	1,492
Non-current restricted cash	1,894	3,468
Collateral for Credit Cards [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Current restricted cash	$ 315	$ 315

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Note 11 - Concentrations (Details) - Accounts Receivable Concentrations (Accounts Receivable [Member])	6 Months Ended		12 Months Ended
	Jun. 30, 2014		Dec. 31, 2013
Customer A [Member]
Concentration Risk [Line Items]
Customer	37.00%		19.00%
Customer B [Member]
Concentration Risk [Line Items]
Customer		[1]	16.00%
Customer C [Member]
Concentration Risk [Line Items]
Customer		[1]	17.00%
Customer D [Member]
Concentration Risk [Line Items]
Customer		[1]	14.00%

[1] Less than 10%.

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Note 2 - Goodwill and Other Intangible Assets (Tables)

6 Months Ended

Jun. 30, 2014

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Finite-Lived Intangible Assets [Table Text Block]

	June 30, 2014
	Gross Carrying Amount		Accumulated Amortization			Accumulated Impairment Losses			Net Carrying Amount
Developed technology	$	6,100	$	(2,796	)	$	—		$	3,304
Non-compete agreements		1,310		(1,246	)		—			64
Backlog		1,300		(1,300	)		—			—
Trademarks		1,200		(180	)		(1,020	)		—
Customer relationships		990		(960	)		—			30
Patents		585		(364	)		(42	)		179
Total	$	11,485	$	(6,846	)	$	(1,062	)	$	3,577

	December 31, 2013
	Gross Carrying Amount		Accumulated Amortization			Accumulated Impairment Losses			Net Carrying Amount
Developed technology	$	6,100	$	(2,491	)	$	—		$	3,609
Non-compete agreements		1,310		(1,169	)		—			141
Backlog		1,300		(1,300	)		—			—
Trademarks		1,200		(180	)		(1,020	)		—
Customer relationships		990		(924	)		—			66
Patents		585		(351	)		(42	)		192
Total	$	11,485	$	(6,415	)	$	(1,062	)	$	4,008

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Note 9 - Commitments and Contingencies (Tables)

6 Months Ended

Jun. 30, 2014

Commitments and Contingencies Disclosure [Abstract]

Operating Leases of Lessee Disclosure [Table Text Block]

	June 30, 2014
2014 (remaining six months)	$	849
2015		1,539
2016		1,575
2017		1,567
2018		1,591
Thereafter		1,398
Total future minimum lease payments	$	8,519

Schedule of Product Warranty Liability [Table Text Block]

	Three Months Ended June 30,						Six Months Ended June 30,
	2014			2013			2014			2013
Balance, beginning of period	$	705		$	1,256		$	709		$	1,172
Warranty costs charged to cost of revenue		50			41			53			138
Change in estimate		—			(132	)		—			(132	)
Utilization of warranty		(50	)		(138	)		(57	)		(151	)
Balance, end of period	$	705		$	1,027		$	705		$	1,027

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Note 10 - Business Segment and Geographic Information (Details)	6 Months Ended
	Jun. 30, 2014
Segment Reporting [Abstract]
Number of Reportable Segments	1

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Note 5 - Investments (Details) - Amortized Cost and Fair Value of Available-For-Sale Securities (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Amortized Cost and Fair Value of Available-For-Sale Securities [Abstract]
Due in one year or less	$ 0
Due in one year or less	0
Due after one year through three years	15,247
Due after one year through three years	15,265
Total available-for-sale securities	15,247
Total available-for-sale securities	$ 15,265	$ 19,550

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Condensed Consolidated Statements of Comprehensive Loss (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Net loss	$ (4,611)	$ (1,457)	$ (8,294)	$ (5,967)
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	3	(3)	46	2
Unrealized gain (loss) on investments	16	(24)	18	(35)
Other comprehensive income (loss)	19	(27)	64	(33)
Comprehensive loss	$ (4,592)	$ (1,484)	$ (8,230)	$ (6,000)

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Note 4 - Other Financial Information

6 Months Ended

Jun. 30, 2014

Disclosure Text Block Supplement [Abstract]

Additional Financial Information Disclosure [Text Block]

Note 4 — Other Financial Information

Restricted Cash

We have pledged cash in connection with contingent payments resulting from a business acquisition, stand-by letters of credit, and credit cards. We have deposited corresponding amounts into money market and non-interest bearing accounts at three financial institutions for these items as follows (in thousands):

	June 30, 2014		December 31, 2013
Contingent and other consideration for acquisition	$	2,504	$	2,504
Collateral for stand-by letters of credit		3,258		1,492
Collateral for credit cards		315		315
Current restricted cash	$	6,077	$	4,311
Contingent and other consideration for acquisition	$	1,000	$	1,000
Collateral for stand-by letters of credit		1,894		3,468
Non-current restricted cash	$	2,894	$	4,468
Total restricted cash	$	8,971	$	8,779

Inventories

Our inventories consisted of the following (in thousands):

	June 30, 2014		December 31, 2013
Raw materials	$	3,542	$	2,431
Work in process		2,761		1,427
Finished goods		3,292		1,097
Inventories	$	9,595	$	4,955

Accrued Expenses and Other Current Liabilities

Accrued expenses and other current liabilities consisted of the following (in thousands):

	June 30, 2014		December 31, 2013
Payroll and commissions payable	$	2,877	$	4,857
Contingent consideration (current portion) and legal expenses		1,448		1,603
Other accrued expenses and current liabilities		1,285		1,503
Accrued expenses and other current liabilities	$	5,610	$	7,963

Accumulated Other Comprehensive Loss

Changes in accumulated other comprehensive loss by component for the quarter ended June 30, 2014 were as follows (in thousands):

	Foreign Currency Translation Adjustments			Unrealized Gains (Losses) on Investments			Total Accumulated Other Comprehensive Loss
Balance, December 31, 2013	$	(106	)	$	(1	)	$	(107	)
Net other comprehensive income		46			18			64
Balance, June 30, 2014	$	(60	)	$	17		$	(43	)

There were no reclassifications of amounts out of accumulated other comprehensive loss, as there have been no sales of securities or translation adjustments that impacted other comprehensive income during the quarter. The tax impact of the changes in accumulated other comprehensive loss was not material.

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Note 10 - Business Segment and Geographic Information (Tables)

6 Months Ended

Jun. 30, 2014

Segment Reporting [Abstract]

Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block]

	Three Months Ended June 30,						Six Months Ended June 30,
	2014			2013			2014			2013
Domestic revenue	$	235		$	468		$	584		$	1,763
International revenue		6,172			8,101			9,720			13,179
Total revenue	$	6,407		$	8,569		$	10,304		$	14,942
Revenue by country:
Bahamas		14	%		1	%		10	%		*	%
Israel		9			*			10			*
China		11			10			8			7
United States		4			5			6			12
Ghana		*			10			*			6
Spain		2			15			5			10
India		3			15			4			14
Others **		57			44			57			51
Total		100	%		100	%		100	%		100	%

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Note 5 - Investments (Details) (USD $)	3 Months Ended	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2014
Investments Schedule [Abstract]
Proceeds from Sale of Available-for-sale Securities	$ 0	$ 0

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Accounting Policies, by Policy (Policies)

6 Months Ended

Jun. 30, 2014

Accounting Policies [Abstract]

Use of Estimates, Policy [Policy Text Block]

Use of Estimates

The preparation of condensed consolidated financial statements in conformity with U.S. generally accepted accounting principles (“U.S. GAAP”) requires our management to make judgments, assumptions, and estimates that affect the amounts reported in the condensed consolidated financial statements and accompanying notes. Our more significant estimates and judgments that we believe are the most critical to aid in fully understanding and evaluating our reported financial results are revenue recognition; allowance for doubtful accounts; allowance for product warranty; valuation of stock options; valuation and impairment of goodwill, long-lived assets, and acquired intangible assets; useful lives for depreciation and amortization; valuation adjustments for excess and obsolete inventory; deferred taxes and valuation allowances on deferred tax assets; and evaluation and measurement of contingencies, including contingent consideration. Actual results could differ materially from those estimates.

Basis of Accounting, Policy [Policy Text Block]

Basis of Presentation

The condensed consolidated financial statements include the accounts of Energy Recovery, Inc. and its wholly-owned subsidiaries. All significant intercompany accounts and transactions have been eliminated.

The accompanying condensed consolidated financial statements have been prepared by us, without audit, 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 U.S. GAAP have been condensed or omitted pursuant to such rules and regulations. The December 31, 2013 condensed consolidated balance sheet was derived from audited financial statements, and may not include all disclosures required by U.S. GAAP; however, we believe that the disclosures are adequate to make the information presented not misleading. These unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and the notes thereto for the fiscal year ended December 31, 2013 included in our Annual Report on Form 10-K filed with the SEC on March 11, 2014.

In the opinion of management, all adjustments, consisting of only normal recurring adjustments that are necessary to present fairly the financial position, results of operations, and cash flows for the interim periods, have been made. The results of operations for the interim periods are not necessarily indicative of the operating results for the full fiscal year or any future periods.

Inventory, Policy [Policy Text Block]

Change in Method of Accounting for Inventory Valuation

Prior to January 1, 2014, inventories were stated at the lower of cost (using the weighted average cost method) or market. Effective January 1, 2014, with the final implementation of our new enterprise resource planning (“ERP”) system, we changed our method of accounting for inventories to the first-in, first-out (“FIFO”) method. We believe that the change is preferable, as the FIFO method better reflects the current value of inventories and provides more accurate matching of manufacturing costs and revenues. Due to the limited capabilities of our former ERP system, we determined that it was impracticable to retrospectively apply the FIFO costing method to prior periods. As such, prior period consolidated financial statements have not been retroactively adjusted. The cumulative effect of this change was not material.

New Accounting Pronouncements, Policy [Policy Text Block]

Recent Accounting Pronouncements

On May 28, 2014, the Financial Accounting Standards Board issued Accounting Standards Update (“ASU”) 2014-09, Revenue from Contracts with Customers. The amendment requires an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. ASU 2014-09 will replace most existing revenue recognition guidance in U.S. GAAP when it becomes effective. ASU 2014-09 is effective for annual reporting periods beginning after December 15, 2016, including interim periods within that reporting period, which is January 1, 2017 for us. Early application is not permitted. ASU 2014-09 permits the use of either the retrospective or cumulative effect transition method. We are evaluating the effect that ASU 2014-09 will have on our consolidated financial statements and related disclosures. We have not yet selected a transition method nor have we determined the effect of the standard on our ongoing financial reporting.