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 March 31, 2022

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)	(I.R.S. Employer Identification No.)

1717 Doolittle Drive, San Leandro, California 94577

(Address of Principal Executive Offices) (Zip Code)

(510) 483-7370

(Registrant’s Telephone Number, Including Area Code)

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading Symbol	Name of each exchange on which registered
Common Stock, $0.001 par value	ERII	The Nasdaq Stock Market LLC

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 þ  No ¨

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

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

Large accelerated filer  ☑    Accelerated filer  ☐    Non-accelerated filer  ☐    Smaller reporting company  ☐    Emerging growth company  ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ¨

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

As of April 27, 2022, there were 56,562,811 shares of the registrant’s common stock outstanding.

ENERGY RECOVERY, INC.

TABLE OF CONTENTS

		Page No.
PART I
FINANCIAL INFORMATION
Item 1	Financial Statements (Unaudited)
	Condensed Consolidated Balance Sheets — March 31, 2022 and December 31, 2021	1
	Condensed Consolidated Statements of Operations — Three Months Ended March 31, 2022 and 2021	2
	Condensed Consolidated Statements of Comprehensive Income — Three Months Ended March 31, 2022 and 2021	3
	Condensed Consolidated Statements of Stockholders’ Equity — Three Months Ended March 31, 2022 and 2021	4
	Condensed Consolidated Statements of Cash Flows — Three Months Ended March 31, 2022 and 2021	5
	Notes to Condensed Consolidated Financial Statements	6
Item 2	Management’s Discussion and Analysis of Financial Condition and Results of Operations	20
Item 3	Quantitative and Qualitative Disclosures About Market Risk	27
Item 4	Controls and Procedures	27
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 3	Defaults Upon Senior Securities	28
Item 4	Mine Safety Disclosures	28
Item 5	Other Information	28
Item 6	Exhibits	29
Signatures		30

Energy Recovery, Inc. | Q1'2022 Form 10-Q

Forward-Looking Information

This Quarterly Report on Form 10-Q for the three months ended March 31, 2022, including Part I, Item 2, “Management’s Discussion and Analysis of Financial Condition and Results of Operations” (the “MD&A”) and certain information incorporated by reference, contain 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 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,” “aims,” “projects,” “intends,” “plans,” “believes,” “estimates,” “seeks,” “continue,” “could,” “may,” “potential,” “should,” “will,” “would,” 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. Readers are directed to risks and uncertainties identified under Part II, Item 1A, “Risk Factors,” and elsewhere in this report for factors that may cause actual results to be different from those expressed in these forward-looking statements. Except as required by law, we undertake no obligation to revise or update publicly any forward-looking statements for any reason.

Forward-looking statements in this report include, without limitation, statements about the following:

•our belief that the pressure exchanger is the industry standard for energy recovery in the seawater reverse osmosis desalination (“SWRO”) industry;

•our belief that the scalability and versatility of our platform can help us achieve success in emerging markets similar to SWRO;

•our belief that the Ultra PX™ addresses key challenges associated with treating industrial wastewater in a range of reverse osmosis (“RO”) applications;

•our belief that the Ultra PX can accelerate adoption of RO in the growing zero liquid discharge (“ZLD”) and minimal liquid discharge (“MLD”) markets;

•our belief that the Ultra PX can help make RO the preferred treatment option to achieve ZLD and MLD requirements by enhancing RO’s affordability and efficiency compared to thermal treatment options.

•our belief that pressure exchanger technology can provide benefits to our customers, including the reduction of capital expenditures and energy use;

•our belief that our pressure exchanger technology can address inefficiencies and waste within industrial systems and processes that involve high-pressure and low-pressure fluid flows;

•our belief that our PX® Pressure Exchanger® (“PX”) has helped make SWRO an economically viable and more sustainable option in the production of potable water;

•our belief that our hydraulic turbochargers (“Turbochargers”) deliver substantial savings and ease of integration into desalination systems;

•our anticipation that markets not traditionally associated with desalination, such as the United States of America (the “U.S.”) and China will inevitably develop and provide further revenue growth opportunities;

•our belief that countries around the world will continue to mandate ZLD or MLD requirements for specific industries;

•our belief that leveraging the Ultra PX with RO will significantly lower thermal demand;

•our belief that, as the existing thermal technology is replaced with RO technology, demand for our products will be created;

•our belief that ongoing operating costs rather than capital expenditures is the key factor in the selection of an ERD solution for megaproject (“MPD”) customers;

•our belief that our PX offers market-leading value with the highest technological and economic benefit;

•our estimate that MPD customer projects represent revenue opportunities from approximately $1 million to $21 million;

•our belief that our solutions offer a competitive advantage compared to our competitors’ solutions because our ERDs provide the lowest life-cycle cost and are, therefore, the most cost-effective ERD solutions for RO desalination applications;

•our belief that leveraging our pressure exchanger technology will unlock new commercial opportunities in the future;

•our belief that sales of carbon dioxide (“CO2”) refrigeration systems will increase in response to regulations and supermarkets’ search for safe natural refrigerants;

Energy Recovery, Inc. | Q1'2022 Form 10-Q | FLS 1

•our belief that our pressure exchanger technology can significantly help reduce the operating costs of CO2 refrigeration systems by recycling the pressure energy of CO2 gas thereby significantly reducing the energy needed to operate these systems;

•our belief that the PX G1300 could eventually alter the standard refrigeration system architecture by reducing costs for retail end users such as grocery stores;

•our belief that we will be able to achieve efficiencies across a wider range of temperatures that exceed incumbent CO2 refrigeration technologies;

•our belief that the Ultra PX™ can address the key challenges associated with treating industrial wastewater in ultra high-pressure reverse osmosis (“UHPRO”) applications;

•our belief that the Ultra PX can help make UHPRO the preferred treatment option to achieve ZLD and MLD requirements by enhancing UHPRO’s affordability and efficiency compared to thermal treatment options;

•our belief that our Ultra PX enables customers to optimize their wastewater treatment process for ZLD and MLD;

•our objective of finding new applications for our technology and developing new products for use outside of desalination;

•our belief that our current facilities will be adequate for the foreseeable future;

•our belief that by investing in research and development, we will be well positioned to continue to execute on our product strategy;

•our expectation that sales outside of the U.S. will remain a significant portion of our revenue;

•the timing of our receipt of payment for products or services from our customers;

•our belief that our existing cash and cash equivalents, our short and/or long-term investments, and the ongoing 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 and/or fund investments in our latest technology arising from rapid market adoption that could require us to seek additional equity or debt financing;

•our expectation that we will be able to enforce our intellectual property (“IP”) rights;

•our expectation that the adoption of new accounting standards will not have a material impact on our financial position or results of operations;

•our share repurchase program will result in repurchases of our common stock or enhance long term stockholder value;

•the impact of changes in internal control over financial reporting; and

•other factors disclosed under the MD&A and Item 3, “Quantitative and Qualitative Disclosures about Market Risk,” and elsewhere in this Form 10-Q.

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 additional risks and uncertainties further discussed under Part II, Item 1A, “Risk Factors,” and are based on information available to us as of May 4, 2022. We assume no obligation to update any such forward-looking statements, 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 Annual Reports on Form 10‑K, Quarterly Reports on Form 10‑Q and Current Reports on Form 8‑K filed with or furnished to the Securities and Exchange Commission (the “SEC”), as well as in Part II, Item 1A, “Risk Factors,” within this Quarterly Report on Form 10-Q. It is important to note that our actual results could differ materially from the results set forth or implied by our forward-looking statements. The factors that could cause our actual results to differ from those included in such forward-looking statements are set forth under the heading Item 1A, “Risk Factors,” in our Quarterly Reports on Form 10-Q, and in our Annual Reports on Form 10-K, and from time-to-time, in our results disclosed on our Current Reports on Form 8-K. In addition, when preparing the MD&A below, we presume the readers have access to and have read the MD&A in our Annual Report on Form 10-K, pursuant to Instruction 2 to paragraph (b) of Item 303 of Regulation S-K.

We provide our Annual Reports on Form 10‑K, Quarterly Reports on Form 10‑Q, Current Reports on Form 8‑K, Proxy Statements, Forms 3, 4 and 5 filed by or on behalf of directors, executive officers and certain large shareholders, and any amendments to those documents filed or furnished pursuant to the Securities Exchange Act of 1934, free of charge on the Investor Relations section of our website, www.energyrecovery.com. These filings will become available as soon as reasonably practicable after such material is electronically filed with or furnished to the SEC. From time to time, we may use our website as a channel of distribution of material company information.

Energy Recovery, Inc. | Q1'2022 Form 10-Q | FLS 2

We also make available in the Investor Relations section of our website our corporate governance documents including our code of business conduct and ethics and the charters of the audit, compensation and nominating and governance committees. These documents, as well as the information on the website, are not intended to be part of this Quarterly Report on Form 10-Q. We use the Investor Relations section of our website as a means of complying with our disclosure obligations under Regulation FD. Accordingly, you should monitor the Investor Relations section of our website in addition to following our press releases, SEC filings and public conference calls and webcasts.

Energy Recovery, Inc. | Q1'2022 Form 10-Q | FLS 3

PART I — FINANCIAL INFORMATION

Item 1 — Financial Statements (unaudited)

ENERGY RECOVERY, INC.

CONDENSED CONSOLIDATED BALANCE SHEETS

	March 31, 2022		December 31, 2021
	(In thousands)
ASSETS
Current assets:
Cash and cash equivalents	$	44,520	$	74,358
Short-term investments	37,702		31,332
Accounts receivable, net	26,674		20,615
Inventories, net	23,482		20,383
Prepaid expenses and other assets	6,594		5,075
Total current assets	138,972		151,763
Long-term investments	14,334		2,298
Deferred tax assets, net	11,070		11,421
Property and equipment, net	19,932		20,361
Operating lease, right of use asset	14,279		14,653
Goodwill and other intangible assets	12,824		12,827
Other assets, non-current	365		367
Total assets	$	211,776	$	213,690
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current liabilities:
Accounts payable	$	4,360	$	909
Accrued expenses and other liabilities	8,093		13,994
Lease liabilities	1,459		1,564
Contract liabilities	2,057		3,318
Total current liabilities	15,969		19,785
Lease liabilities, non-current	14,615		14,879
Other liabilities, non-current	226		247
Total liabilities	30,810		34,911
Commitments and contingencies (Note 7)
Stockholders’ equity:
Common stock	64		64
Additional paid-in capital	198,211		195,593
Accumulated other comprehensive loss	(418)		(149)
Treasury stock	(61,888)		(53,832)
Retained earnings	44,997		37,103
Total stockholders’ equity	180,966		178,779
Total liabilities and stockholders’ equity	$	211,776	$	213,690

See Accompanying Notes to Condensed Consolidated Financial Statements

Energy Recovery, Inc. | Q1'2022 Form 10-Q | 1

ENERGY RECOVERY, INC.

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

	Three Months Ended March 31,
	2022		2021
	(In thousands, except per share data)
Revenue	$	32,546	$	28,940
Cost of revenue	9,498		8,981
Gross profit	23,048		19,959
Operating expenses:
General and administrative	6,551		6,610
Sales and marketing	3,364		2,703
Research and development	4,911		4,502
Total operating expenses	14,826		13,815
Income from operations	8,222		6,144
Other income (expense):
Interest income	61		92
Other non-operating income (expense), net	56		(10)
Total other income, net	117		82
Income before income taxes	8,339		6,226
Provision for (benefit from) income taxes	445		(640)
Net income	$	7,894	$	6,866
Net income per share:
Basic	$	0.14	$	0.12
Diluted	$	0.14	$	0.12
Number of shares used in per share calculations:
Basic	56,783		56,877
Diluted	58,181		58,597

See Accompanying Notes to Condensed Consolidated Financial Statements

Energy Recovery, Inc. | Q1'2022 Form 10-Q | 2

ENERGY RECOVERY, INC.

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

	Three Months Ended March 31,
	2022		2021
	(In thousands)
Net income	$	7,894	$	6,866
Other comprehensive loss, net of tax
Foreign currency translation adjustments	(11)		(25)
Unrealized loss on investments	(258)		(48)
Total other comprehensive loss, net of tax	(269)		(73)
Comprehensive income	$	7,625	$	6,793

See Accompanying Notes to Condensed Consolidated Financial Statements

Energy Recovery, Inc. | Q1'2022 Form 10-Q | 3

ENERGY RECOVERY, INC.

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY

	Three Months Ended March 31,
	2022		2021
	(In thousands, except shares)
Common stock
Beginning balance	$	64	$	62
Issuance of common stock, net	—		1
Ending balance	64		63
Additional paid-in capital
Beginning balance	195,593		179,161
Issuance of common stock, net	763		6,058
Stock-based compensation	1,855		1,864
Ending balance	198,211		187,083
Accumulated other comprehensive loss
Beginning balance	(149)		53
Other comprehensive loss
Foreign currency translation adjustments	(11)		(25)
Unrealized loss on investments	(258)		(48)
Total other comprehensive loss, net	(269)		(73)
Ending balance	(418)		(20)
Treasury stock
Beginning balance	(53,832)		(30,486)
Common stock repurchased	(8,056)		—
Ending balance	(61,888)		(30,486)
Retained earnings
Beginning balance	37,103		22,834
Net income	7,894		6,866
Ending balance	44,997		29,700
Total stockholders’ equity	$	180,966	$	186,340
Common stock issued (shares)
Beginning balance	63,544,419		61,798,004
Issuance of common stock, net	294,148		1,079,563
Ending balance	63,838,567		62,877,567
Treasury stock (shares)
Beginning balance	6,721,153		5,455,935
Common stock repurchased	415,441		—
Ending balance	7,136,594		5,455,935
Total common stock outstanding (shares)	56,701,973		57,421,632

See Accompanying Notes to Condensed Consolidated Financial Statements

Energy Recovery, Inc. | Q1'2022 Form 10-Q | 4

ENERGY RECOVERY, INC.

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

	Three Months Ended March 31,
	2022		2021
	(In thousands)
Cash flows from operating activities:
Net income	$	7,894	$	6,866
Adjustments to reconcile net income to cash (used in) provided by operating activities
Stock-based compensation	1,880		1,913
Depreciation and amortization	1,388		1,347
Amortization of premiums and discounts on investments	288		71
Deferred income taxes	351		(669)
Other non-cash adjustments	57		(12)
Changes in operating assets and liabilities:
Accounts receivable, net	(6,042)		(4,605)
Contract assets	(299)		(183)
Inventories, net	(3,123)		(186)
Prepaid and other assets	(721)		281
Accounts payable	4,618		821
Accrued expenses and other liabilities	(6,611)		(5,182)
Contract liabilities	(1,282)		(408)
Net cash (used in) provided by operating activities	(1,602)		54
Cash flows from investing activities:
Maturities of marketable securities	10,421		5,710
Purchases of marketable securities	(29,377)		—
Capital expenditures	(1,976)		(622)
Net cash (used in) provided by investing activities	(20,932)		5,088
Cash flows from financing activities:
Net proceeds from issuance of common stock	763		6,059
Repurchase of common stock	(8,056)		—
Net cash (used in) provided by financing activities	(7,293)		6,059
Effect of exchange rate differences on cash, cash equivalents and restricted cash	(11)		(25)
Net change in cash, cash equivalents and restricted cash	(29,838)		11,176
Cash, cash equivalents and restricted cash, beginning of year	74,461		94,358
Cash, cash equivalents and restricted cash, end of period	$	44,623	$	105,534

See Accompanying Notes to Condensed Consolidated Financial Statements

Energy Recovery, Inc. | Q1'2022 Form 10-Q | 5

ENERGY RECOVERY, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Note 1 — Description of Business and Significant Accounting Policies

Energy Recovery, Inc. and its wholly-owned subsidiaries (the “Company” or “Energy Recovery”) designs and manufactures solutions that make industrial processes more efficient and sustainable. Leveraging the Company’s pressure exchanger technology, which generates little to no emissions when operating, the Company’s solutions lower costs, save energy, reduce waste and minimize emissions for companies across a variety of industrial processes. As the world coalesces around the urgent need to address climate change and its impacts, the Company is helping companies reduce their energy consumption in their industrial processes, which in turn, reduces their carbon footprint. The Company believes that its customers do not have to sacrifice quality and cost savings for sustainability and is committed to developing solutions that drive long-term value – both financial and environmental. The Company’s solutions are marketed, sold in, or developed for, the fluid-flow and gas markets, such as seawater and industrial wastewater desalination, natural gas, chemical processing and refrigeration, under the trademarks ERI®, Ultra PX™, PX®, Pressure Exchanger®, PX Pressure Exchanger® (“PX”), PX PowerTrain™, VorTeq™, IsoBoost®, AT™, and AquaBold™. The Company owns, manufactures and/or develops its solutions, in whole or in part, in the United States of America (the “U.S.”).

Basis of Presentation

The Condensed Consolidated Financial Statements include the accounts of Energy Recovery, Inc. and its wholly-owned subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation.

The accompanying Condensed Consolidated Financial Statements have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission (the “SEC”). Certain information and footnote disclosures normally included in the financial statements prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) have been condensed or omitted pursuant to such rules and regulations. The December 31, 2021 Condensed Consolidated Balance Sheet was derived from audited financial statements and may not include all disclosures required by GAAP; however, the Company believes that the disclosures are adequate to make the information presented not misleading.

The March 31, 2022 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, 2021 included in the Company’s Annual Report on Form 10-K filed with the SEC on February 24, 2022 (the “2021 Annual Report”).

All adjustments consisting of 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.

Reclassifications

Certain prior period amounts have been reclassified in the Condensed Consolidated Statements of Operations, Condensed Consolidated Statements of Cash Flows and certain notes to the Condensed Consolidated Financial Statements to conform to the current period presentation.

Use of Estimates

The preparation of Condensed Consolidated Financial Statements, in conformity with GAAP, requires the Company’s management to make judgments, assumptions and estimates that affect the amounts reported in the Condensed Consolidated Financial Statements and accompanying notes.

The accounting policies that reflect the Company’s more significant estimates and judgments and that the Company believes are the most critical to aid in fully understanding and evaluating its reported financial results are revenue recognition; valuation of stock options; valuation and impairment of goodwill; inventory; deferred taxes and valuation allowances on deferred tax assets; and evaluation and measurement of contingencies. Those estimates could change, and as a result, actual results could differ materially from those estimates.

Energy Recovery, Inc. | Q1'2022 Form 10-Q | 6

ENERGY RECOVERY, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Due to the novel coronavirus (“COVID-19”) pandemic and the Ukraine-Russia conflict, and the impact of these events and circumstances on the Company’s customers, there has been uncertainty and disruption in the global economy and financial markets. The Company is not aware of any specific event or circumstance that would require an update to its estimates or judgments or a revision of the carrying value of its assets or liabilities as of May 4, 2022, the date of issuance of this Quarterly Report on Form 10-Q. These estimates may change, as new events occur and additional information is obtained. Actual results could differ materially from these estimates under different assumptions or conditions. The Company undertakes no obligation to update publicly these estimates for any reason after the date of this Quarterly Report on Form 10-Q, except as required by law.

Significant Accounting Policies

There have been no material changes to the Company’s significant accounting policies in Note 1, “Description of Business and Significant Accounting Policies,” of the Notes to Consolidated Financial Statements included in Item 8, “Financial Statements and Supplementary Data,” in the 2021 Annual Report.

Recently Issued Accounting Pronouncement Not Yet Adopted

In March 2020, the FASB issued ASU No. 2020-04, Reference Rate Reform (Topic 848) (“ASU 2020-04”), which provided optional expedients and exceptions for applying U.S. GAAP to contracts, hedging relationships, and other transactions affected by the discontinuation of the London Interbank Offered Rate (“LIBOR”) or by another reference rate expected to be discontinued. The FASB later issued ASU No. 2021-01, Reference Rate Reform (Topic 848): Scope, to clarify the scope of Topic 848 so that derivatives affected by the discounting transition are explicitly eligible for certain optional expedients and exceptions in Topic 848 (“ASU 2021-01”). Entities may apply the provisions of the new standards as of the beginning of the reporting period when the election is made (i.e., as early as the first quarter of 2020). Unlike other topics, the provisions of this update are only available until December 31, 2022, when the reference rate replacement activity is expected to have been completed. An entity may elect to apply amendments prospectively through December 31, 2022. The optional expedients were available to be used upon issuance of this guidance but the Company has not yet applied the guidance because the Company has not yet modified its existing contract for reference rate reform. The Company does not expect the provisions of ASU 2020-04 or ASU 2021-01 to have a material impact on its financial condition, results of operations, and cash flows.

Energy Recovery, Inc. | Q1'2022 Form 10-Q | 7

ENERGY RECOVERY, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Note 2 — Revenue

Disaggregation of Revenue

The following table presents the disaggregated revenues by segment, and within each segment, by product type, by primary geographical market based on the customer “shipped to” address, and by channel customers.

The Company classifies its channel customers as follows:

•Megaproject (“MPD”). MPD customers are major firms that develop, design, build, own and/or operate large-scale desalination plants.

•Original Equipment Manufacturer (“OEM”). OEM customers are companies that supply equipment, packaged systems, and various operating and maintenance solutions for small to medium-sized desalination plants, utilized by commercial and industrial entities, as well as national, state and local municipalities worldwide.

•Aftermarket (“AM”). AM customers are desalination plant owners and/or operators who can utilize our technology to upgrade or keep their plant running.

Sales and usage-based taxes are excluded from revenues. See Note 9, “Segment Reporting,” for further discussion related to the Company’s segments.

	Three Months Ended March 31, 2022						Three Months Ended March 31, 2021
	Water		Emerging Technologies		Total		Water		Emerging Technologies		Total
	(In thousands)
Product type
PXs, pumps and turbo devices, and other	$	32,516	$	30	$	32,546	$	28,940	$	—	$	28,940
Primary geographical market
Middle East and Africa	$	22,128	$	—	$	22,128	$	20,960	$	—	$	20,960
Asia	6,746		—		6,746		7,178		—		7,178
Americas	2,301		30		2,331		423		—		423
Europe	1,341		—		1,341		379		—		379
Total revenue	$	32,516	$	30	$	32,546	$	28,940	$	—	$	28,940
Channel
Megaproject	$	23,840	$	—	$	23,840	$	23,757	$	—	$	23,757
Original equipment manufacturer	4,671		—		4,671		2,791		—		2,791
Aftermarket	4,005		30		4,035		2,392		—		2,392
Total revenue	$	32,516	$	30	$	32,546	$	28,940	$	—	$	28,940

Energy Recovery, Inc. | Q1'2022 Form 10-Q | 8

ENERGY RECOVERY, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Contract Balances

The following table presents contract balances by category.

	March 31, 2022		December 31, 2021
	(In thousands)
Accounts receivable, net	$	26,674	$	20,615
Contract assets, current (included in prepaid expenses and other assets)	792		493
Contract liabilities:
Contract liabilities, current	$	2,057	$	3,318
Contract liabilities, non-current (included in other liabilities, non-current)	67		88
Total contract liabilities	$	2,124	$	3,406

Contract Liabilities

The Company records contract liabilities, which consist of customer deposits and deferred revenue, when cash payments are received in advance of the Company’s performance. The following table presents significant changes in contract liabilities during the period.

	March 31, 2022		December 31, 2021
	(In thousands)
Contract liabilities, beginning of year	$	3,406	$	1,640
Revenue recognized	(2,510)		(1,415)
Cash received, excluding amounts recognized as revenue during the period	1,228		3,181
Contract liabilities, end of period	$	2,124	$	3,406

Future Performance Obligations

As of March 31, 2022, the following table presents the future estimated revenue by year expected to be recognized related to performance obligations that are unsatisfied or partially unsatisfied.

Year Recognized	Future Performance Obligations
	(In thousands)
2022 (remaining nine months)	$	9,282
2023	12,860
2024	1,472
Total	$	23,614

Energy Recovery, Inc. | Q1'2022 Form 10-Q | 9

ENERGY RECOVERY, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Note 3 — Net Income Per Share

Net income for the reported period is divided by the weighted average number of common shares outstanding during the reported period to calculate basic net income per common share.

•Basic net income per common share excludes any dilutive effect of stock options and restricted stock units ("RSU").

•Diluted net income per common share reflects the potential dilution that would occur if outstanding stock options to purchase common stock were exercised for shares of common stock, using the treasury stock method, and if the shares of common stock underlying each unvested RSU were issued.

Outstanding stock options to purchase common stock and unvested RSUs are collectively referred to as “stock awards.”

The following table presents the computation of basic and diluted net income per common share.

	Three Months Ended March 31,
	2022		2021
	(In thousands, except per share amounts)
Numerator
Net income	$	7,894	$	6,866
Denominator (weighted average shares)
Basic common shares outstanding	56,783		56,877
Dilutive stock awards	1,398		1,720
Diluted common shares outstanding	58,181		58,597
Net income per share
Basic	$	0.14	$	0.12
Diluted	$	0.14	$	0.12

Certain shares of common stock issuable under stock awards have been omitted from the diluted net income per common share calculations because their inclusion is considered anti-dilutive. The following table presents the weighted potential common shares issuable under stock awards that were excluded from the computation of diluted net income per common share.

	Three Months Ended March 31,
	2022	2021
	(In thousands)
Anti-dilutive stock award shares	298	447

Energy Recovery, Inc. | Q1'2022 Form 10-Q | 10

ENERGY RECOVERY, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Note 4 — Other Financial Information

Cash, Cash Equivalents and Restricted Cash

The Condensed Consolidated Statements of Cash Flows explain the changes in the total of cash, cash equivalents and restricted cash. The following table presents a reconciliation of cash, cash equivalents and restricted cash(1) reported within the Condensed Consolidated Balance Sheets that sum to the total of such amounts presented.

	March 31, 2022		December 31, 2021		March 31, 2021
	(In thousands)
Cash and cash equivalents	$	44,520	$	74,358	$	105,431
Restricted cash, non-current (included in other assets, non-current)	103		103		103
Total cash, cash equivalents and restricted cash	$	44,623	$	74,461	$	105,534

(1)    The Company pledged and deposited cash amounts into restricted cash accounts in connection with the Company’s credit cards.

Accounts Receivable, net

	March 31, 2022		December 31, 2021
	(In thousands)
Accounts receivable, gross	$	26,774	$	20,732
Allowance for doubtful accounts	(100)		(117)
Accounts receivable, net	$	26,674	$	20,615

Inventories, net

	March 31, 2022		December 31, 2021
	(In thousands)
Raw materials (1)	$	9,933	$	7,352
Work in process (1)	3,352		3,406
Finished goods (1)	10,865		10,274
Inventories, gross	24,150		21,032
Valuation adjustments for excess and obsolete inventory	(668)		(649)
Inventories, net	$	23,482	$	20,383

(1)Inventories are stated at the lower of cost or net realizable value, using the first-in, first-out method.

Prepaid Expenses and Other Assets

	March 31, 2022		December 31, 2021
	(In thousands)
Contract assets	$	792	$	493
Cloud computing arrangement implementation costs	1,002		1,041
Supplier advances	2,700		1,717
Other prepaid expenses and other assets	2,100		1,824
Total prepaid expenses and other assets	$	6,594	$	5,075

Energy Recovery, Inc. | Q1'2022 Form 10-Q | 11

ENERGY RECOVERY, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Goodwill and Other Intangible Assets

	March 31, 2022		December 31, 2021
	(In thousands)
Goodwill	$	12,790	$	12,790
Other intangible assets, net	34		37
Total goodwill and other intangible assets	$	12,824	$	12,827

Accrued Expenses and Other Liabilities

	March 31, 2022		December 31, 2021
	(In thousands)
Current
Payroll, incentives and commissions payable	$	4,293	$	10,170
Warranty reserve	914		879
Other accrued expenses and other liabilities	2,886		2,945
Total accrued expenses and other liabilities	8,093		13,994
Other liabilities, non-current	226		247
Total accrued expenses, and current and non-current other liabilities	$	8,319	$	14,241

Energy Recovery, Inc. | Q1'2022 Form 10-Q | 12

ENERGY RECOVERY, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Note 5 — Investments and Fair Value Measurements

Available-for-Sale Investments

The Company’s investments in investment-grade short-term and long-term marketable debt instruments, such as corporate notes and bonds, are classified as available-for-sale. As of March 31, 2022 and 2021, available-for-sale investments were classified on the Condensed Consolidated Balance Sheets as either short-term and/or long-term investments.

The classification of available-for-sale investments on the Condensed Consolidated Balance Sheets and definition of each of these classifications are provided in Note 1, “Description of Business and Significant Accounting Policies - Significant Accounting Policies,” subsections “Cash and Cash Equivalents” and “Short-term and Long-term Investments,” of the Notes to Consolidated Financial Statements included in Item 8, “Financial Statements and Supplementary Data,” in the 2021 Annual Report.

Expected maturities can differ from contractual maturities because borrowers may have the right to prepay obligations without prepayment penalties. The Company generally holds available-for-sale investments until maturity; however, from time-to-time, the Company may elect to sell certain available-for-sale investments prior to contractual maturity.

Fair Value of Financial Instruments

All of the Company’s financial assets and liabilities are remeasured and reported at fair value at each reporting period, and are classified and disclosed in one of the following three pricing category levels:

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, thereby requiring an entity to develop its own assumptions that market participants would use in pricing.

The following table presents the Company’s financial assets measured on a recurring basis by contractual maturity, including pricing category, amortized cost, gross unrealized gains and losses, and fair value.

		March 31, 2022								December 31, 2021
	Pricing Category	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value		Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
		(In thousands)
Cash equivalents
Money market securities	Level 1	$	27,084	$	—	$	—	$	27,084	$	50,865	$	—	$	—	$	50,865
Short-term and long-term investments
Corporate notes and bonds – short-term	Level 2	37,873		—		(171)		37,702		31,371		—		(39)		31,332
Corporate notes and bonds – long-term	Level 2	14,540		—		(206)		14,334		2,307		—		(9)		2,298
Total short and long-term investments		52,413		—		(377)		52,036		33,678		—		(48)		33,630
Total		$	79,497	$	—	$	(377)	$	79,120	$	84,543	$	—	$	(48)	$	84,495

As of March 31, 2022 and 2021, the Company had no financial liabilities and no Level 3 financial assets. During the three months ended March 31, 2022, the Company had no transfers of financial assets between any levels.

Energy Recovery, Inc. | Q1'2022 Form 10-Q | 13

ENERGY RECOVERY, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

    The following table presents a summary of the fair value and gross unrealized losses on the available-for-sale securities that have been in a continuous unrealized loss position, aggregated by type of investment instrument. The available-for-sale securities that were in an unrealized gain position have been excluded from the table.

	March 31, 2022				December 31, 2021
	Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses
	(In thousands)
Corporate notes and bonds	$	52,036	$	(377)	$	33,630	$	(48)

Energy Recovery, Inc. | Q1'2022 Form 10-Q | 14

ENERGY RECOVERY, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Note 6 — Lines of Credit

Credit Agreement

The Company entered into a credit agreement with JPMorgan Chase Bank, N.A. (“JPMC”) on December 22, 2021 (the “Credit Agreement”). The Credit Agreement, which will expire on December 21, 2026, provides a committed revolving credit line of $50.0 million and includes both a revolving loan and a letters of credit (“LCs”) component. Under the Credit Agreement, as of March 31, 2022, there were no revolving loans outstanding. In addition, under the LCs component, the Company utilized $20.4 million of the maximum allowable credit line of $25.0 million, which includes newly issued LCs, and previously issued and unexpired stand-by letters of credits (“SBLCs”) and certain non-expired commitments under the Company’s previous Loan and Pledge Agreement with Citibank, N.A. which are guaranteed under the Credit Agreement.

The following table presents the total outstanding LCs and SBLCs issued by the Company related to product warranty and performance guarantees.

	March 31, 2022		December 31, 2021
	(In thousands)
Outstanding letters of credit	$	13,124	$	13,960

Energy Recovery, Inc. | Q1'2022 Form 10-Q | 15

ENERGY RECOVERY, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Note 7 — Commitments and Contingencies

Warranty

The following table presents the changes in the Company’s accrued product warranty reserve.

	Three Months Ended March 31,
	2022		2021
	(In thousands)
Warranty reserve balance, beginning of year	$	879	$	760
Warranty costs charged to cost of revenue	125		127
Utilization charges against reserve	(5)		—
Release of accrual related to expired warranties	(85)		(76)
Warranty reserve balance, end of period	$	914	$	811

Litigation

From time-to-time, the Company has been named in and subject to various proceedings and claims in connection with its business. The Company may in the future become involved in litigation in the ordinary course of business, including litigation that could be material to its business. The Company considers all claims, if any, on a quarterly basis and, based on known facts, assesses whether potential losses are considered reasonably possible, probable and estimable. Based upon this assessment, the Company then evaluates disclosure requirements and whether to accrue for such claims in its consolidated financial statements. The Company records a provision for a liability when it is both probable that a liability has been incurred and the amount of the loss can be reasonably estimated. These provisions are reviewed at least quarterly and are adjusted to reflect the impacts of negotiations, settlements, rulings, advice of legal counsel and other information and events pertaining to a particular case. As of March 31, 2022, the Company was not involved in any lawsuits and there were no material losses which were probable or reasonably possible.

Energy Recovery, Inc. | Q1'2022 Form 10-Q | 16

ENERGY RECOVERY, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Note 8 — Income Taxes

	Three Months Ended March 31,
	2022			2021
	(In thousands, except percentages)
Provision for (benefit from) income taxes	$	445		$	(640)
Discrete items	599			1,627
Provision for income taxes, excluding discrete items	$	1,044		$	987
Effective tax rate	5.3		%	(10.3		%)
Effective tax rate, excluding discrete items	12.5		%	15.8		%

The Company’s tax provision for interim periods is determined using an estimate of its annual effective tax rate, adjusted for discrete items, if any, that arise during the period. Each quarter, the Company updates its estimate of the annual effective tax rate, and if the estimated annual effective tax rate changes, the Company makes a cumulative adjustment in such period. The Company’s quarterly tax provision and estimate of its annual effective tax rate are subject to variation due to several factors, including variability in accurately predicting its pre-tax income or loss and the mix of jurisdictions to which they relate, intercompany transactions, the applicability of special tax regimes, and changes in how the Company does business.

For the three months ended March 31, 2022, the recognized income tax expense included a benefit primarily related to the U.S. federal foreign-derived intangible income (“FDII”) and federal research and development (“R&D”) tax credit, along with a discrete tax benefit due primarily to stock-based compensation windfalls. For the three months ended March 31, 2021, the recognized income tax benefit included the U.S. federal R&D tax credit along with a discrete tax benefit due primarily to stock-based compensation windfalls.

The effective tax rate excluding discrete items for the three months ended March 31, 2022, as compared to the three months ended March 31, 2021, was lower largely related to the FDII benefit projected for the 2022 fiscal year.

Energy Recovery, Inc. | Q1'2022 Form 10-Q | 17

ENERGY RECOVERY, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Note 9 — Segment Reporting

The Company’s chief operating decision-maker (“CODM”) is its chief executive officer. The Company continues to monitor and review its segment reporting structure in accordance with authoritative guidance to determine whether any changes have occurred that would impact its reportable segments.

The following table presents a summary of the Company’s financial information by segment and corporate operating expenses.

	Three Months Ended March 31, 2022						Three Months Ended March 31, 2021
	Water		Emerging Technologies		Total		Water		Emerging Technologies		Total
	(In thousands)
Revenue	$	32,516	$	30	$	32,546	$	28,940	$	—	$	28,940
Cost of revenue	9,480		18		9,498		8,981		—		8,981
Gross profit	23,036		12		23,048		19,959		—		19,959
Operating expenses
General and administrative	1,464		908		2,372		1,561		1,166		2,727
Sales and marketing	2,301		527		2,828		2,164		179		2,343
Research and development	800		4,111		4,911		501		4,001		4,502
Total operating expenses	4,565		5,546		10,111		4,226		5,346		9,572
Operating income (loss)	$	18,471	$	(5,534)	12,937		$	15,733	$	(5,346)	10,387
Less: Corporate operating expenses					4,715						4,243
Income from operations					$	8,222					$	6,144

Energy Recovery, Inc. | Q1'2022 Form 10-Q | 18

ENERGY RECOVERY, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Note 10 — Concentrations

Revenue

The following table presents customers that account for 10% or more of the Company’s revenues. Although certain customers might account for greater than 10% of revenues at any one point in time, the concentration of revenue between a limited number of customers shifts regularly, depending on timing of shipments. The percentages by customer reflect specific relationships or contracts that would concentrate revenue for the periods presented and do not indicate a trend specific to any one customer.

	Three Months Ended March 31,
	2022	2021
Customer A	35%	**
Customer B	**	18%
Customer C	**	17%
Customer D	**	16%
Customer E	**	15%

**    Zero or less than 10%.

Energy Recovery, Inc. | Q1'2022 Form 10-Q | 19

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

Overview

Energy Recovery, Inc. (the “Company”, “Energy Recovery”, “we”, “our” and “us”) designs and manufactures solutions that make industrial processes more efficient and sustainable. Leveraging our pressure exchanger technology, which generates little to no emissions when operating, our solutions lower costs, save energy, reduce waste and minimize emissions for companies across a variety of industrial processes. As the world coalesces around the urgent need to address climate change and its impacts, we are helping companies reduce their energy consumption in their industrial processes, which in turn, reduces their carbon footprint. We believe that our customers do not have to sacrifice quality and cost savings for sustainability and are committed to developing solutions that drive long-term value – both financial and environmental.

The original product application of our technology, the PX® Pressure Exchanger® (“PX”) energy recovery device (“ERD”), was a major contributor to the advancement of seawater reverse osmosis desalination (“SWRO”), significantly lowering the energy intensity and cost of water production globally from SWRO. We have since introduced our pressure exchanger technology to the fast growing industrial wastewater (“IWW”) filtration market, such as battery manufacturers, mining operations, and manufacturing plants that discharge wastewater with significant levels of metals and pollutants, as well as the commercial and industrial refrigeration market.

Engineering, and research and development (“R&D”), have been, and remain, an essential part of our history, culture and corporate strategy. Since our formation, we have developed leading technology and engineering expertise through the continual evolution of our pressure exchanger technology, which can enhance environmental sustainability and improve productivity by reducing waste and energy consumption in high-pressure industrial fluid-flow systems. This versatile technology works as a platform to build product applications and is at the heart of many of our products. In addition, we have engineered and developed ancillary devices, such as our hydraulic turbochargers (“Turbochargers”) and boosters, that complement our ERDs.

Quarterly Highlights

In January and April 2022, we announced contract awards totaling nearly $45.0 million for our PX ERDs as well as several of our PX PowerTrain™ solutions for desalination plants in the Kingdom of Saudi Arabia and other countries within the Gulf region. These contract orders are expected to be fulfilled by the end of fiscal year 2023.

In February 2022, we announced awards totaling $0.9 million to supply our PX ERDs and an array of pumps to support IWW treatment operations at a battery-grade lithium carbonate manufacturing facility in Tibet, China and a textile wastewater treatment facility in Rajasthan, India. The textile wastewater treatment facility in India will utilize a combination of our PXs, turbochargers, and boosters to maximize efficiency.

In April 2022, IR Magazine, the independent, global voice of the investor relations profession, awarded to Energy Recovery as the winner of the “Best ESG Reporting (small to mid-cap company)” for our 2020 ESG Report. For further details on our Environmental, Social and Governance (“ESG”) efforts and initiative, please refer to our website at “https://ir.energyrecovery.com/websites/energyrecover/English/6500/esg-at-energy-recovery.html#”. We have included this website address only as an inactive textual reference and do not intend it to be an active link to our website.

Energy Recovery, Inc. | Q1'2022 Form 10-Q | 20

Results of Operations

A discussion regarding our financial condition and results of operations for the three months ended March 31, 2022, compared to the three months ended March 31, 2021, is presented below.

Revenue

Variability in revenue from quarter to quarter is typical, therefore year-on-year year-to-date comparisons are not necessarily indicative of the trend for the full year due to these variations.

Revenues by channel customers are presented in the following table.

	Three Months Ended March 31,
	2022				2021
	$		% of Revenue		$		% of Revenue		Change
	(In thousands, except percentages)
Megaproject	$	23,840	73	%	$	23,757	82	%	$	83	—	%
Original equipment manufacturer	4,671		14	%	2,791		10	%	1,880		67	%
Aftermarket	4,035		13	%	2,392		8	%	1,643		69	%
Total revenues	$	32,546	100	%	$	28,940	100	%	$	3,606	12	%

The MPD channel is the main driver of our long-term growth as revenue from this channel benefits from the higher quantity of larger projects as well as long project cycles. Comparative differences over the prior year’s revenue are subject to timing of delivery of PXs, which is dependent on the MPD shipment cycle which is project specific. During the first quarter, as compared to prior year, we have observed an increase in project sizes and project count, which will increase revenues as product is shipped according to the project schedule.

The OEM channel, where we sell into a number of industries, including tourism and hospitality, contains projects of shorter duration. The increases in SWRO OEM channel revenues, as compared to the prior year, we believe were due primarily to pent up demand from the effects of COVID-19. The OEM channel had higher revenues related to increased project sizes in the Middle East and Africa, Asia, and America regions. In addition, the IWW OEM channel revenues, which accounted for 9% of total OEM revenues in the first quarter of 2022, increased 21% over prior year.

The AM channel revenues generally fluctuate from year-to-year depending on support and services rendered to our installed customer base. In 2022, we experienced increased sales of product which we believe is a result of our customers consuming their existing spare parts inventory and strategically increasing their stock of critical components in advance of greater expected water needs in the near future. The AM channel had higher revenues related to spare parts consumption in the Asia and America regions.

Gross Profit and Gross Margin

Gross profit represents our 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.

	Three Months Ended March 31,
	2022				2021
	$		Gross Margin		$		Gross Margin		Change in Product Gross Profit
	(In thousands, except percentages)
Gross profit and gross margin	$	23,048	70.8	%	$	19,959	69.0	%	$	3,089	15.5	%

The increase in gross profit was due primarily to higher revenues related to increased sales of PXs, pumps and turbochargers, and an increase in product gross margin. The higher gross margin was due primarily to higher increased average selling price of our PXs and manufacturing efficiencies, partially offset by higher labor and material costs.

Energy Recovery, Inc. | Q1'2022 Form 10-Q | 21

Operating Expenses

Total Operating Expenses

	Three Months Ended March 31,
	2022				2021
	$		% of Revenue		$		% of Revenue		Change
	(In thousands, except percentages)
General and administrative	$	6,551	20	%	$	6,610	23	%	$	(59)	(1	%)
Sales and marketing	3,364		10	%	2,703		9	%	661		24	%
Research and development	4,911		15	%	4,502		16	%	409		9	%
Total operating expenses	$	14,826	46	%	$	13,815	48	%	$	1,011	7	%

General and Administrative Expenses. The decrease in general and administrative (“G&A”) expenses was due primarily to lower legal fees and employee compensation costs, partially offset by higher bank charges and administrative costs.

Sales and Marketing Expenses. The increase in sales and marketing (“S&M”) expenses was due primarily to higher employee-related costs, higher marketing costs, such as trade shows and marketing materials and increased travel expenditures.

Research and Development Expenses. The increase in R&D expenses was due primarily to an increase in expenditures related to CO2 and other projects, partially offset by lower employee compensation, share-based compensation and travel expenses.

Segment and Corporate Operating Expenses

Expense activities that are included in our Water and Emerging Technologies segments and corporate operating expenses are presented below. See Note 9, “Segment Reporting,” of the Notes to Condensed Consolidated Financial Statements in Part I, Item 1, “Financial Statements (unaudited),” of this Quarterly Report on Form 10-Q (the “Notes”) for further discussion regarding our segments.

	Three Months Ended March 31, 2022								Three Months Ended March 31, 2021
	Water		Emerging Technologies		Corporate		Total		Water		Emerging Technologies		Corporate		Total
	(In thousands)
Operating expenses
General and administrative	$	1,464	$	908	$	4,179	$	6,551	$	1,561	$	1,166	$	3,883	$	6,610
Sales and marketing	2,301		527		536		3,364		2,164		179		360		2,703
Research and development	800		4,111		—		4,911		501		4,001		—		4,502
Total operating expenses	$	4,565	$	5,546	$	4,715	$	14,826	$	4,226	$	5,346	$	4,243	$	13,815

Water Segment. The increase in the Water segment operating expenses of $0.3 million was due primarily to an increase in expenditures related to new initiatives related to industrial wastewater, and an increase in travel costs, partially offset by lower employee and share-based compensation expenses, and a decrease in consulting expenses.

Emerging Technologies Segment. The increase of the Emerging Technologies segment operating expenses of $0.2 million was due primarily to higher R&D expenditures and an increase in consulting expenses, partially offset by lower employee and share-based compensation expenses, and lower depreciation expenses. The higher expenditures included an increase of $1.4 million related to refrigeration and other initiatives, partially offset by a reduction in VorTeq-related expenditures of $1.3 million.

Corporate Operating Expenses. The increase of the corporate operating expenses of $0.5 million was due primarily to an increase in employee compensation, share-based compensation and travel expenses, partially offset by lower legal fees.

Energy Recovery, Inc. | Q1'2022 Form 10-Q | 22

Other Income, Net

	Three Months Ended March 31,
	2022		2021		Change
	(In thousands)
Interest income	$	61	$	92	$	(31)
Other non-operating income (expense), net	56		(10)		66
Total other income, net	$	117	$	82	$	35

The increase in Total other income, net was due primarily to sales of scrap assets previously written off partially offset by lower interest income.

Income Taxes

	Three Months Ended March 31,
	2022			2021
	(In thousands, except percentages)
Provision for (benefit from) income taxes	$	445		$	(640)
Discrete items	599			1,627
Provision for income taxes, excluding discrete items	$	1,044		$	987
Effective tax rate	5.3		%	(10.3		%)
Effective tax rate, excluding discrete items	12.5		%	15.8		%

The tax provision for interim periods is determined using an estimate of our annual effective tax rate, adjusted for discrete items, if any, that arise during the period. Each quarter, we update our estimate of the annual effective tax rate, and if the estimated annual effective tax rate changes, we make a cumulative adjustment in such period. The quarterly tax provision and estimate of our annual effective tax rate are subject to variation due to several factors, including variability in accurately predicting our pre-tax income or loss and the mix of jurisdictions to which they relate, intercompany transactions, the applicability of special tax regimes, and changes in how we do business.

For the three months ended March 31, 2022, the recognized income tax expense included a benefit primarily related to the United States of America (the “U.S.”) federal foreign-derived intangible income (“FDII”) deduction as we expect to utilize all of our net operating loss (“NOL”) carryforwards in fiscal year 2022 due to our projected income exceeding the amount of NOL carryforwards, and federal R&D tax credit, along with a discrete tax benefit due primarily to stock-based compensation windfalls. For the three months ended March 31, 2021, the recognized income tax benefit included the U.S. federal R&D tax credit along with a discrete tax benefit due primarily to stock-based compensation windfalls.

The effective tax rate excluding discrete items was lower largely related to the FDII benefit projected for the 2022 fiscal year.

Energy Recovery, Inc. | Q1'2022 Form 10-Q | 23

Liquidity and Capital Resources

Overview

From time-to-time, management and our Board of Directors review our liquidity and future cash needs and may make a decision on (1) the return of capital to our shareholders through a share repurchase program or dividend payout; or (2) seek additional debt or equity financing. As of March 31, 2022, our principal sources of liquidity consisted of (i) unrestricted cash and cash equivalents of $44.5 million; (ii) investment-grade short-term and long-term marketable debt instruments of $52.0 million that are primarily invested in corporate notes and bonds; and (iii) accounts receivable, net of allowances, of $26.7 million. As of March 31, 2022, there were unrestricted cash and cash equivalents of $1.0 million held outside the U.S. We invest cash not needed for current operations predominantly in investment-grade, marketable debt instruments with the intent to make such funds available for operating purposes as needed. Although these securities are available for sale, we generally hold these securities to maturity, and therefore, do not currently see a need to trade these securities in order to support our liquidity needs in the foreseeable future. The risk of this portfolio to us is in the ability of the underlying companies to cover their obligations at maturity, not in our ability to trade these securities at a profit. Based on current projections, we believe existing cash balances and future cash inflows from this portfolio will meet our liquidity needs for at least the next 12 months.

Credit Arrangements

We entered into a credit agreement with JPMorgan Chase Bank, N.A. (“JPMC”) on December 22, 2021 (“Credit Agreement”) to provide us with additional capital to fuel our growth and expansion into emerging markets utilizing our pressure exchanger technology. The Credit Agreement, which will expire on December 21, 2026, provides a committed revolving credit line of $50.0 million and includes both a revolving loan and a letters of credit (“LCs”) component. Upon entering into the Credit Agreement, we terminated the existing Loan and Pledge Agreement dated January 27, 2017 with Citibank, N.A. (“Loan and Pledge Agreement”). As of March 31, 2022 we were in compliance with all covenants under the Credit Agreement.

Under the Credit Agreement, as of March 31, 2022, there were no revolving loans outstanding. In addition, as of March 31, 2022, under the LCs component, we utilized $20.4 million of the maximum allowable credit line of $25.0 million, which includes newly issued LCs, and previously issued and unexpired stand-by letters of credits (“SBLCs”) and certain non-expired commitments under the Company’s previous Loan and Pledge Agreement which are guaranteed under the Credit Agreement.

As of March 31, 2022, all of the issued and unexpired SBLCs issued under the Loan and Pledge Agreement were covered as a LC issuance under the Credit Agreement, and together with new LC issuances under the Credit Agreement, there were $13.1 million of outstanding LCs with a weighted average remaining life of twelve months. See Note 6, “Lines of Credit,” of the Notes for further discussion related to the Credit Agreement.

Share Repurchase Program

On March 9, 2021, our Board of Directors authorized a share repurchase program (the “March 2021 Authorization”) which we may repurchase, under management’s discretion, up to $50.0 million in aggregate cost, which includes both the share value of the acquired common stock and the fees charged in connection with acquiring the common stock. Since inception of the March 2021 Authorization, we repurchased 1,680,659 shares at an aggregate cost of approximately $31.4 million. As of March 31, 2022, under the March 2021 Authorization, we may repurchase additional shares of our outstanding common stock at an aggregate cost of approximately $18.6 million.

Energy Recovery, Inc. | Q1'2022 Form 10-Q | 24

Cash Flows

	Three Months Ended March 31,
	2022		2021		Change
	(In thousands)
Net cash (used in) provided by operating activities	$	(1,602)	$	54	$	(1,656)
Net cash (used in) provided by investing activities	(20,932)		5,088		(26,020)
Net cash (used in) provided by financing activities	(7,293)		6,059		(13,352)
Effect of exchange rate differences on cash, cash equivalents and restricted cash	(11)		(25)		14
Net change in cash, cash equivalents and restricted cash	$	(29,838)	$	11,176	$	(41,014)

Cash Flows from Operating Activities

Net cash (used in) provided by operating activities is subject to the project driven, non-cyclical nature of our business. Operating cash flow can fluctuate significantly from year to year, due to the timing of receipts of large project orders. Operating cash flow may be negative in one year and significantly positive in the next, consequently individual quarterly results and comparisons may not necessarily indicate a significant trend, either positive or negative.

The change in net cash used in operating activities in the current year, compared to net cash provided by operating activities in the prior year, was due primarily to increased planned inventory purchases and finished goods production, timing of invoices and cash collected on accounts receivables, partially offset by lower cash used for accounts payable and accrued expenses, related to timing of payments and recognition of expenses. The increase in inventory was according to our production forecast and to ensure there is sufficient raw material and finished goods supply to mitigate any supply chain issues, such as potential shipment delays related to port congestion, and/or supplier material and labor shortages.

Cash Flows from Investing Activities

Net cash (used in) provided by investing activities primarily relates to maturities and purchases of marketable securities, and capital expenditures supporting our growth. Our investments in marketable securities are structured to preserve principal and liquidity while at the same time maximizing yields without significantly increasing risk. The change in cash used in investing activities in the current year, as compared to cash provided by investing activities in the prior year, was due primarily to the higher investment of debt securities of $24.7 million, as we increased our investment portfolio by $19.0 million since year end. In mid-2021, we changed our investment strategy from investing in money market funds to investing in investment-grade corporate notes and bonds which provided higher interest yields. In addition to our investments in corporate notes and bonds, we had higher capital expenditures of $1.3 million.

Cash Flows from Financing Activities

Net cash (used in) provided by financing activities primarily relates to the share repurchases under our board authorized share repurchase program and offset by issuance of equity from our employee equity incentive plans. The change in net cash used in financing activities for the current year, as compared to the net cash provided by financing activities for the prior year, was due primarily to share repurchases of $8.1 million under the March 2021 Authorization, partially offset by lower issuance of equity of $5.3 million related to our employee equity incentive plans.

Energy Recovery, Inc. | Q1'2022 Form 10-Q | 25

Liquidity and Capital Resource Requirements

We believe that our existing resources and cash generated from our operations will be sufficient to meet our anticipated capital requirements for at least the next 12 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 and/or to fund investments in our latest technology arising from rapid market adoption. These needs could require us to seek additional equity or debt financing. Our future capital requirements will depend on many factors including the continuing market acceptance of our products, our rate of revenue growth, the timing of new product introductions, the expansion of our R&D, manufacturing and S&M activities, the timing and extent of our expansion into new geographic territories and the amount and timing of cash used for stock repurchases. In addition, 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. Should we need additional liquidity or capital funds, these funds may not be available to us on favorable terms, or at all.

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 which would have been established for the purpose of facilitating off-balance sheet arrangements or other contractually narrow or limited purposes.

Recent Accounting Pronouncements

Refer to Note 1, “Description of Business and Significant Accounting Policies – Significant Accounting Policies,” of the Notes.

Energy Recovery, Inc. | Q1'2022 Form 10-Q | 26

Item 3 — Quantitative and Qualitative Disclosures About Market Risk

Our exposure to market risk may be found primarily in two areas, foreign currency and interest rates.

Foreign Currency Risk

Our foreign currency exposures are due to fluctuations in exchange rates for U.S. dollar (“USD”) versus the British pound, Saudi riyal, Emirati dirham, European euro, Chinese yuan, Indian rupee and Canadian dollar. Changes in currency exchange rates could adversely affect our consolidated operating results or financial position.

Our revenue contracts have been denominated in USD. At times, our international customers may have difficulty in obtaining USD to pay our receivables, thus increasing collection risk and potential doubtful account expense. As we expand our international sales, a portion of our revenue could be denominated in foreign currencies. As a result, our cash and operating results could be increasingly affected by changes in exchange rates.

In addition, we pay many vendors in foreign currency and, therefore, are subject to changes in foreign currency exchange rates. Our international sales and service operations incur expense that is denominated in foreign currencies. This expense could be materially affected by currency fluctuations. Our international sales and services operations also maintain cash balances denominated in foreign currencies. To decrease the inherent risk associated with translation of foreign cash balances into our reporting currency, we do not maintain excess cash balances in foreign currencies.

We have not hedged our exposure to changes in foreign currency exchange rates because expenses in foreign currencies have been insignificant to date and exchange rate fluctuations have had little impact on our operating results and cash flows. In addition, we do not have any exposure to the Russian ruble.

Interest Rate and Credit Risks

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 investment-grade short-term and long-term marketable debt instruments that are subject to counter-party credit risk. To minimize this risk, we invest pursuant to an investment policy approved by our board of directors. The policy mandates high credit rating requirements and restricts our exposure to any single corporate issuer by imposing concentration limits.

As of March 31, 2022, our investment portfolio of $52.0 million, in investment-grade short-term and long-term marketable debt instruments, such as corporate notes and bonds, are classified as either short-term and/or long-term investments on our Condensed Consolidated Balance Sheets. 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 a weighted average maturity of less than nine months. As of March 31, 2022, a hypothetical 1% increase in interest rates would have resulted in a less than $0.4 million decrease in the fair value of our fixed-income debt securities.

Item 4 — Controls and Procedures

Evaluation of Disclosure Controls and Procedures

Our management, with the participation of our President and Chief Executive Officer and our Chief Financial Officer, 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, our President and Chief Executive Officer and our Chief Financial Officer have concluded that, as of March 31, 2022, our disclosure controls and procedures are effective.

Changes in Internal Controls

There were no changes in our internal control over financial reporting during the period covered by this report that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

Energy Recovery, Inc. | Q1'2022 Form 10-Q | 27

PART II — OTHER INFORMATION

Item 1 — Legal Proceedings

Note 7, “Commitments and Contingencies – Litigation,” of the Notes to Consolidated Financial Statements in Part II, Item 8, “Financial Statements and Supplementary Data,” in our Annual Report on Form 10‑K for the year ended December 31, 2021 filed with the U.S. Securities and Exchange Commission on February 24, 2022 (“2021 Annual Report”), provides information on certain litigation in which we are involved.

For an update on the litigation matters previously disclosed in the 2021 Annual Report, see the discussion in Note 7, “Commitments and Contingencies – Litigation,” of the Notes, which discussion is incorporated by reference into this Item 1.

Item 1A — Risk Factors

There have been no material changes in our risk factors from those disclosed in Part I, Item 1A, “Risk Factors,” in the 2021 Annual Report.

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

Purchases of Equity Securities by the Issuer and Affiliated Purchasers

On March 9, 2021, our Board of Directors authorized a share repurchase program (the “March 2021 Authorization”). The following table summarizes the stock repurchase activity under the March 2021 Authorization during the three months ended March 31, 2022.

Period	Total Number of Shares Purchased	Average Price Paid per Share(1)	Total Number of Shares Purchased as Part of Publically Announced Program	Maximum Number of Shares or Approximate Dollar Value (2) That May Yet to be Purchased Under the Program
				(In thousands)
January 1 – January 31, 2022	197,438	$19.27	1,462,656	$22,845
February 1 – February 28, 2022	—	—	1,462,656	22,845
March 1 – March 31, 2022	218,003	19.46	1,680,659	18,598

(1)    Excluding commissions

(2)    Including commissions

Item 3 — Defaults Upon Senior Securities

None.

Item 4 — Mine Safety Disclosures

Not applicable.

Item 5 — Other Information

None.

Energy Recovery, Inc. | Q1'2022 Form 10-Q | 28

Item 6 — Exhibits

A list of exhibits filed or furnished with this report or incorporated herein by reference is found in the Exhibit Index below.

Exhibit Number	Exhibit Description
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**	Certification of Principal Executive Officer and Principal Financial Officer, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
101	Inline XBRL Document Set for the consolidated financial statements and accompanying notes in Part I, “Financial Information” of this Quarterly Report on Form 10-Q.
104	Inline XBRL for the cover page of this Quarterly Report on Form 10-Q, included in the Exhibit 101 Inline XBRL Document Set.

*    Filed herewith.

**    The certifications furnished in Exhibits 32.1 are deemed to accompany this Form 10-Q and are not deemed “filed” for purposes of Section 18 of the Exchange Act, or otherwise subject to the liability of that section, nor shall they be deemed incorporated by reference into any filing under the Securities Act or the Exchange Act.

Energy Recovery, Inc. | Q1'2022 Form 10-Q | 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.

		ENERGY RECOVERY, INC.
Date:	May 4, 2022	By:	/s/ ROBERT YU LANG MAO
			Robert Yu Lang Mao
			President and Chief Executive Officer
			(Principal Executive Officer)
Date:	May 4, 2022	By:	/s/ JOSHUA BALLARD
			Joshua Ballard
			Chief Financial Officer
			(Principal Financial and Accounting Officer)

Energy Recovery, Inc. | Q1'2022 Form 10-Q | 30

EX-31.1

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, Robert Yu Lang Mao, certify that:

1.I have reviewed this Quarterly Report on Form 10-Q of Energy Recovery, Inc. for the period ended March 31, 2022;

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.I am 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.I have disclosed, based on my 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: May 4, 2022	/s/ ROBERT YU LANG MAO
	Name:	Robert Yu Lang Mao
	Title:	President and Chief Executive Officer
		(Principal Executive Officer )

EX-31.2

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, Joshua Ballard, certify that:

1.I have reviewed this Quarterly Report on Form 10-Q of Energy Recovery, Inc. for the period ended March 31, 2022;

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.I am 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.I have disclosed, based on my 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: May 4, 2022	/s/ JOSHUA BALLARD
	Name:	Joshua Ballard
	Title:	Chief Financial Officer
		(Principal Financial and Accounting Officer)

EX-32.1

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, Robert Yu Lang Mao, President and Chief Executive Officer of Energy Recovery, Inc., and Joshua Ballard, Chief Financial Officer of Energy Recovery, Inc., each hereby certify that, to the best of his knowledge:

1.     The Company’s Quarterly Report on Form 10-Q for the period ended March 31, 2022, 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.

IN WITNESS WHEREOF, the undersigned has set his hand hereto:

Date: May 4, 2022	/s/ ROBERT YU LANG MAO
	Robert Yu Lang Mao
	President and Chief Executive Officer
Date: May 4, 2022	/s/ JOSHUA BALLARD
	Joshua Ballard
	Chief Financial Officer

*    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.

XML

Cover Page - shares	3 Months Ended
	Mar. 31, 2022	Apr. 27, 2022
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2022
Document Transition Report	false
Entity File Number	001-34112
Entity Registrant Name	Energy Recovery, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	01-0616867
Entity Address, Address Line One	1717 Doolittle Drive
Entity Address, City or Town	San Leandro
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	94577
City Area Code	510
Local Phone Number	483-7370
Title of 12(b) Security	Common Stock, $0.001 par value
Trading Symbol	ERII
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding (in shares)		56,562,811
Entity Central Index Key	0001421517
Document Fiscal Year Focus	2022
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	Q1
Amendment Flag	false

XML

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 44,520	$ 74,358
Short-term investments	37,702	31,332
Accounts receivable, net	26,674	20,615
Inventories, net	23,482	20,383
Prepaid expenses and other assets	6,594	5,075
Total current assets	138,972	151,763
Long-term investments	14,334	2,298
Deferred tax assets, net	11,070	11,421
Property and equipment, net	19,932	20,361
Operating lease, right of use asset	14,279	14,653
Goodwill and other intangible assets	12,824	12,827
Other assets, non-current	365	367
Total assets	211,776	213,690
Current liabilities:
Accounts payable	4,360	909
Accrued expenses and other liabilities	8,093	13,994
Lease liabilities	1,459	1,564
Contract liabilities	2,057	3,318
Total current liabilities	15,969	19,785
Lease liabilities, non-current	14,615	14,879
Other liabilities, non-current	226	247
Total liabilities	30,810	34,911
Commitments and contingencies (Note 7)
Stockholders’ equity:
Common stock	64	64
Additional paid-in capital	198,211	195,593
Accumulated other comprehensive loss	(418)	(149)
Treasury stock	(61,888)	(53,832)
Retained earnings	44,997	37,103
Total stockholders’ equity	180,966	178,779
Total liabilities and stockholders’ equity	$ 211,776	$ 213,690

XML

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Income Statement [Abstract]
Revenue	$ 32,546	$ 28,940
Cost of revenue	9,498	8,981
Gross profit	23,048	19,959
Operating expenses:
General and administrative	6,551	6,610
Sales and marketing	3,364	2,703
Research and development	4,911	4,502
Total operating expenses	14,826	13,815
Income from operations	8,222	6,144
Other income (expense):
Interest income	61	92
Other non-operating income (expense), net	56	(10)
Total other income, net	117	82
Income before income taxes	8,339	6,226
Provision for (benefit from) income taxes	445	(640)
Net income	$ 7,894	$ 6,866
Net income per share:
Basic (in dollars per share)	$ 0.14	$ 0.12
Diluted (in dollars per share)	$ 0.14	$ 0.12
Number of shares used in per share calculations:
Basic (in shares)	56,783	56,877
Diluted (in shares)	58,181	58,597

XML

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 7,894	$ 6,866
Other comprehensive loss, net of tax
Foreign currency translation adjustments	(11)	(25)
Unrealized loss on investments	(258)	(48)
Total other comprehensive loss, net of tax	(269)	(73)
Comprehensive income	$ 7,625	$ 6,793

XML

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common stock	Additional paid-in capital	Accumulated other comprehensive loss	Treasury stock	Retained earnings
Beginning balance at Dec. 31, 2020		$ 62	$ 179,161	$ 53	$ (30,486)	$ 22,834
Beginning balance (in shares) at Dec. 31, 2020		61,798,004			5,455,935
Increase (Decrease) in Stockholders' Equity
Issuance of common stock, net		$ 1	6,058
Issuance of common stock (in shares)		1,079,563
Stock-based compensation			1,864
Foreign currency translation adjustments				(25)
Unrealized loss on investments				(48)
Total other comprehensive loss, net of tax	$ (73)			(73)
Net income	6,866					6,866
Ending balance at Mar. 31, 2021	$ 186,340	$ 63	187,083	(20)	$ (30,486)	29,700
Ending balance (in shares) at Mar. 31, 2021	57,421,632	62,877,567			5,455,935
Beginning balance at Dec. 31, 2021	$ 178,779	$ 64	195,593	(149)	$ (53,832)	37,103
Beginning balance (in shares) at Dec. 31, 2021		63,544,419			6,721,153
Increase (Decrease) in Stockholders' Equity
Issuance of common stock, net			763
Issuance of common stock (in shares)		294,148
Stock-based compensation			1,855
Foreign currency translation adjustments				(11)
Unrealized loss on investments				(258)
Total other comprehensive loss, net of tax	(269)			(269)
Common stock repurchased					$ (8,056)
Common stock repurchased (in shares)					415,441
Net income	7,894					7,894
Ending balance at Mar. 31, 2022	$ 180,966	$ 64	$ 198,211	$ (418)	$ (61,888)	$ 44,997
Ending balance (in shares) at Mar. 31, 2022	56,701,973	63,838,567			7,136,594

XML

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash flows from operating activities:
Net income	$ 7,894	$ 6,866
Adjustments to reconcile net income to cash (used in) provided by operating activities
Stock-based compensation	1,880	1,913
Depreciation and amortization	1,388	1,347
Amortization of premiums and discounts on investments	288	71
Deferred income taxes	351	(669)
Other non-cash adjustments	57	(12)
Changes in operating assets and liabilities:
Accounts receivable, net	(6,042)	(4,605)
Contract assets	(299)	(183)
Inventories, net	(3,123)	(186)
Prepaid and other assets	(721)	281
Accounts payable	4,618	821
Accrued expenses and other liabilities	(6,611)	(5,182)
Contract liabilities	(1,282)	(408)
Net cash (used in) provided by operating activities	(1,602)	54
Cash flows from investing activities:
Maturities of marketable securities	10,421	5,710
Purchases of marketable securities	(29,377)	0
Capital expenditures	(1,976)	(622)
Net cash (used in) provided by investing activities	(20,932)	5,088
Cash flows from financing activities:
Net proceeds from issuance of common stock	763	6,059
Repurchase of common stock	(8,056)	0
Net cash (used in) provided by financing activities	(7,293)	6,059
Effect of exchange rate differences on cash, cash equivalents and restricted cash	(11)	(25)
Net change in cash, cash equivalents and restricted cash	(29,838)	11,176
Cash, cash equivalents and restricted cash, beginning of year	74,461	94,358
Cash, cash equivalents and restricted cash, end of period	$ 44,623	$ 105,534

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Description of Business and Significant Accounting Policies

3 Months Ended

Mar. 31, 2022

Accounting Policies [Abstract]

Description of Business and Significant Accounting Policies

Description of Business and Significant Accounting PoliciesEnergy Recovery, Inc. and its wholly-owned subsidiaries (the “Company” or “Energy Recovery”) designs and manufactures solutions that make industrial processes more efficient and sustainable. Leveraging the Company’s pressure exchanger technology, which generates little to no emissions when operating, the Company’s solutions lower costs, save energy, reduce waste and minimize emissions for companies across a variety of industrial processes. As the world coalesces around the urgent need to address climate change and its impacts, the Company is helping companies reduce their energy consumption in their industrial processes, which in turn, reduces their carbon footprint. The Company believes that its customers do not have to sacrifice quality and cost savings for sustainability and is committed to developing solutions that drive long-term value – both financial and environmental. The Company’s solutions are marketed, sold in, or developed for, the fluid-flow and gas markets, such as seawater and industrial wastewater desalination, natural gas, chemical processing and refrigeration, under the trademarks ERI®, Ultra PX™, PX®, Pressure Exchanger®, PX Pressure Exchanger® (“PX”), PX PowerTrain™, VorTeq™, IsoBoost®, AT™, and AquaBold™. The Company owns, manufactures and/or develops its solutions, in whole or in part, in the United States of America (the “U.S.”).

Basis of Presentation

The Condensed Consolidated Financial Statements include the accounts of Energy Recovery, Inc. and its wholly-owned subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation.

The accompanying Condensed Consolidated Financial Statements have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission (the “SEC”). Certain information and footnote disclosures normally included in the financial statements prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) have been condensed or omitted pursuant to such rules and regulations. The December 31, 2021 Condensed Consolidated Balance Sheet was derived from audited financial statements and may not include all disclosures required by GAAP; however, the Company believes that the disclosures are adequate to make the information presented not misleading.

The March 31, 2022 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, 2021 included in the Company’s Annual Report on Form 10-K filed with the SEC on February 24, 2022 (the “2021 Annual Report”).

All adjustments consisting of 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.

Reclassifications

Certain prior period amounts have been reclassified in the Condensed Consolidated Statements of Operations, Condensed Consolidated Statements of Cash Flows and certain notes to the Condensed Consolidated Financial Statements to conform to the current period presentation.

Use of Estimates

The preparation of Condensed Consolidated Financial Statements, in conformity with GAAP, requires the Company’s management to make judgments, assumptions and estimates that affect the amounts reported in the Condensed Consolidated Financial Statements and accompanying notes.

The accounting policies that reflect the Company’s more significant estimates and judgments and that the Company believes are the most critical to aid in fully understanding and evaluating its reported financial results are revenue recognition; valuation of stock options; valuation and impairment of goodwill; inventory; deferred taxes and valuation allowances on deferred tax assets; and evaluation and measurement of contingencies. Those estimates could change, and as a result, actual results could differ materially from those estimates.

Due to the novel coronavirus (“COVID-19”) pandemic and the Ukraine-Russia conflict, and the impact of these events and circumstances on the Company’s customers, there has been uncertainty and disruption in the global economy and financial markets. The Company is not aware of any specific event or circumstance that would require an update to its estimates or judgments or a revision of the carrying value of its assets or liabilities as of May 4, 2022, the date of issuance of this Quarterly Report on Form 10-Q. These estimates may change, as new events occur and additional information is obtained. Actual results could differ materially from these estimates under different assumptions or conditions. The Company undertakes no obligation to update publicly these estimates for any reason after the date of this Quarterly Report on Form 10-Q, except as required by law.Significant Accounting PoliciesThere have been no material changes to the Company’s significant accounting policies in Note 1, “Description of Business and Significant Accounting Policies,” of the Notes to Consolidated Financial Statements included in Item 8, “Financial Statements and Supplementary Data,” in the 2021 Annual Report.Recently Issued Accounting Pronouncement Not Yet AdoptedIn March 2020, the FASB issued ASU No. 2020-04, Reference Rate Reform (Topic 848) (“ASU 2020-04”), which provided optional expedients and exceptions for applying U.S. GAAP to contracts, hedging relationships, and other transactions affected by the discontinuation of the London Interbank Offered Rate (“LIBOR”) or by another reference rate expected to be discontinued. The FASB later issued ASU No. 2021-01, Reference Rate Reform (Topic 848): Scope, to clarify the scope of Topic 848 so that derivatives affected by the discounting transition are explicitly eligible for certain optional expedients and exceptions in Topic 848 (“ASU 2021-01”). Entities may apply the provisions of the new standards as of the beginning of the reporting period when the election is made (i.e., as early as the first quarter of 2020). Unlike other topics, the provisions of this update are only available until December 31, 2022, when the reference rate replacement activity is expected to have been completed. An entity may elect to apply amendments prospectively through December 31, 2022. The optional expedients were available to be used upon issuance of this guidance but the Company has not yet applied the guidance because the Company has not yet modified its existing contract for reference rate reform. The Company does not expect the provisions of ASU 2020-04 or ASU 2021-01 to have a material impact on its financial condition, results of operations, and cash flows.

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Revenue

3 Months Ended

Mar. 31, 2022

Revenue from Contract with Customer [Abstract]

Revenue

Revenue

Disaggregation of Revenue

The following table presents the disaggregated revenues by segment, and within each segment, by product type, by primary geographical market based on the customer “shipped to” address, and by channel customers.

The Company classifies its channel customers as follows:

•Megaproject (“MPD”). MPD customers are major firms that develop, design, build, own and/or operate large-scale desalination plants.

•Original Equipment Manufacturer (“OEM”). OEM customers are companies that supply equipment, packaged systems, and various operating and maintenance solutions for small to medium-sized desalination plants, utilized by commercial and industrial entities, as well as national, state and local municipalities worldwide.

•Aftermarket (“AM”). AM customers are desalination plant owners and/or operators who can utilize our technology to upgrade or keep their plant running.

Sales and usage-based taxes are excluded from revenues. See Note 9, “Segment Reporting,” for further discussion related to the Company’s segments.

	Three Months Ended March 31, 2022						Three Months Ended March 31, 2021
	Water		Emerging Technologies		Total		Water		Emerging Technologies		Total
	(In thousands)
Product type
PXs, pumps and turbo devices, and other	$	32,516	$	30	$	32,546	$	28,940	$	—	$	28,940
Primary geographical market
Middle East and Africa	$	22,128	$	—	$	22,128	$	20,960	$	—	$	20,960
Asia	6,746		—		6,746		7,178		—		7,178
Americas	2,301		30		2,331		423		—		423
Europe	1,341		—		1,341		379		—		379
Total revenue	$	32,516	$	30	$	32,546	$	28,940	$	—	$	28,940
Channel
Megaproject	$	23,840	$	—	$	23,840	$	23,757	$	—	$	23,757
Original equipment manufacturer	4,671		—		4,671		2,791		—		2,791
Aftermarket	4,005		30		4,035		2,392		—		2,392
Total revenue	$	32,516	$	30	$	32,546	$	28,940	$	—	$	28,940

Contract Balances

The following table presents contract balances by category.

	March 31, 2022		December 31, 2021
	(In thousands)
Accounts receivable, net	$	26,674	$	20,615
Contract assets, current (included in prepaid expenses and other assets)	792		493
Contract liabilities:
Contract liabilities, current	$	2,057	$	3,318
Contract liabilities, non-current (included in other liabilities, non-current)	67		88
Total contract liabilities	$	2,124	$	3,406

Contract Liabilities

The Company records contract liabilities, which consist of customer deposits and deferred revenue, when cash payments are received in advance of the Company’s performance. The following table presents significant changes in contract liabilities during the period.

	March 31, 2022		December 31, 2021
	(In thousands)
Contract liabilities, beginning of year	$	3,406	$	1,640
Revenue recognized	(2,510)		(1,415)
Cash received, excluding amounts recognized as revenue during the period	1,228		3,181
Contract liabilities, end of period	$	2,124	$	3,406

Future Performance Obligations

As of March 31, 2022, the following table presents the future estimated revenue by year expected to be recognized related to performance obligations that are unsatisfied or partially unsatisfied.

Year Recognized	Future Performance Obligations
	(In thousands)
2022 (remaining nine months)	$	9,282
2023	12,860
2024	1,472
Total	$	23,614

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Net Income Per Share

3 Months Ended

Mar. 31, 2022

Earnings Per Share [Abstract]

Net Income Per Share

Net Income Per Share

Net income for the reported period is divided by the weighted average number of common shares outstanding during the reported period to calculate basic net income per common share.

•Basic net income per common share excludes any dilutive effect of stock options and restricted stock units ("RSU").

•Diluted net income per common share reflects the potential dilution that would occur if outstanding stock options to purchase common stock were exercised for shares of common stock, using the treasury stock method, and if the shares of common stock underlying each unvested RSU were issued.

Outstanding stock options to purchase common stock and unvested RSUs are collectively referred to as “stock awards.”

The following table presents the computation of basic and diluted net income per common share.

	Three Months Ended March 31,
	2022		2021
	(In thousands, except per share amounts)
Numerator
Net income	$	7,894	$	6,866
Denominator (weighted average shares)
Basic common shares outstanding	56,783		56,877
Dilutive stock awards	1,398		1,720
Diluted common shares outstanding	58,181		58,597
Net income per share
Basic	$	0.14	$	0.12
Diluted	$	0.14	$	0.12

Certain shares of common stock issuable under stock awards have been omitted from the diluted net income per common share calculations because their inclusion is considered anti-dilutive. The following table presents the weighted potential common shares issuable under stock awards that were excluded from the computation of diluted net income per common share.

	Three Months Ended March 31,
	2022	2021
	(In thousands)
Anti-dilutive stock award shares	298	447

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Other Financial Information

3 Months Ended

Mar. 31, 2022

Other Financial Information [Abstract]

Other Financial Information

Other Financial Information

Cash, Cash Equivalents and Restricted Cash

The Condensed Consolidated Statements of Cash Flows explain the changes in the total of cash, cash equivalents and restricted cash. The following table presents a reconciliation of cash, cash equivalents and restricted cash(1) reported within the Condensed Consolidated Balance Sheets that sum to the total of such amounts presented.

	March 31, 2022		December 31, 2021		March 31, 2021
	(In thousands)
Cash and cash equivalents	$	44,520	$	74,358	$	105,431
Restricted cash, non-current (included in other assets, non-current)	103		103		103
Total cash, cash equivalents and restricted cash	$	44,623	$	74,461	$	105,534

(1)    The Company pledged and deposited cash amounts into restricted cash accounts in connection with the Company’s credit cards.

Accounts Receivable, net

	March 31, 2022		December 31, 2021
	(In thousands)
Accounts receivable, gross	$	26,774	$	20,732
Allowance for doubtful accounts	(100)		(117)
Accounts receivable, net	$	26,674	$	20,615

Inventories, net

	March 31, 2022		December 31, 2021
	(In thousands)
Raw materials (1)	$	9,933	$	7,352
Work in process (1)	3,352		3,406
Finished goods (1)	10,865		10,274
Inventories, gross	24,150		21,032
Valuation adjustments for excess and obsolete inventory	(668)		(649)
Inventories, net	$	23,482	$	20,383

(1)Inventories are stated at the lower of cost or net realizable value, using the first-in, first-out method.

Prepaid Expenses and Other Assets

	March 31, 2022		December 31, 2021
	(In thousands)
Contract assets	$	792	$	493
Cloud computing arrangement implementation costs	1,002		1,041
Supplier advances	2,700		1,717
Other prepaid expenses and other assets	2,100		1,824
Total prepaid expenses and other assets	$	6,594	$	5,075

Goodwill and Other Intangible Assets

	March 31, 2022		December 31, 2021
	(In thousands)
Goodwill	$	12,790	$	12,790
Other intangible assets, net	34		37
Total goodwill and other intangible assets	$	12,824	$	12,827

Accrued Expenses and Other Liabilities

	March 31, 2022		December 31, 2021
	(In thousands)
Current
Payroll, incentives and commissions payable	$	4,293	$	10,170
Warranty reserve	914		879
Other accrued expenses and other liabilities	2,886		2,945
Total accrued expenses and other liabilities	8,093		13,994
Other liabilities, non-current	226		247
Total accrued expenses, and current and non-current other liabilities	$	8,319	$	14,241

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Investments and Fair Value Measurements

3 Months Ended

Mar. 31, 2022

Investments, Fair Value Disclosure [Abstract]

Investments and Fair Value Measurements

Investments and Fair Value Measurements

Available-for-Sale Investments

The Company’s investments in investment-grade short-term and long-term marketable debt instruments, such as corporate notes and bonds, are classified as available-for-sale. As of March 31, 2022 and 2021, available-for-sale investments were classified on the Condensed Consolidated Balance Sheets as either short-term and/or long-term investments.

The classification of available-for-sale investments on the Condensed Consolidated Balance Sheets and definition of each of these classifications are provided in Note 1, “Description of Business and Significant Accounting Policies - Significant Accounting Policies,” subsections “Cash and Cash Equivalents” and “Short-term and Long-term Investments,” of the Notes to Consolidated Financial Statements included in Item 8, “Financial Statements and Supplementary Data,” in the 2021 Annual Report.

Expected maturities can differ from contractual maturities because borrowers may have the right to prepay obligations without prepayment penalties. The Company generally holds available-for-sale investments until maturity; however, from time-to-time, the Company may elect to sell certain available-for-sale investments prior to contractual maturity.

Fair Value of Financial Instruments

All of the Company’s financial assets and liabilities are remeasured and reported at fair value at each reporting period, and are classified and disclosed in one of the following three pricing category levels:

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, thereby requiring an entity to develop its own assumptions that market participants would use in pricing.

The following table presents the Company’s financial assets measured on a recurring basis by contractual maturity, including pricing category, amortized cost, gross unrealized gains and losses, and fair value.

		March 31, 2022								December 31, 2021
	Pricing Category	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value		Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
		(In thousands)
Cash equivalents
Money market securities	Level 1	$	27,084	$	—	$	—	$	27,084	$	50,865	$	—	$	—	$	50,865
Short-term and long-term investments
Corporate notes and bonds – short-term	Level 2	37,873		—		(171)		37,702		31,371		—		(39)		31,332
Corporate notes and bonds – long-term	Level 2	14,540		—		(206)		14,334		2,307		—		(9)		2,298
Total short and long-term investments		52,413		—		(377)		52,036		33,678		—		(48)		33,630
Total		$	79,497	$	—	$	(377)	$	79,120	$	84,543	$	—	$	(48)	$	84,495

As of March 31, 2022 and 2021, the Company had no financial liabilities and no Level 3 financial assets. During the three months ended March 31, 2022, the Company had no transfers of financial assets between any levels.

The following table presents a summary of the fair value and gross unrealized losses on the available-for-sale securities that have been in a continuous unrealized loss position, aggregated by type of investment instrument. The available-for-sale securities that were in an unrealized gain position have been excluded from the table.

	March 31, 2022				December 31, 2021
	Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses
	(In thousands)
Corporate notes and bonds	$	52,036	$	(377)	$	33,630	$	(48)

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Lines of Credit

3 Months Ended

Mar. 31, 2022

Debt Disclosure [Abstract]

Lines of Credit

Lines of Credit

Credit Agreement

The Company entered into a credit agreement with JPMorgan Chase Bank, N.A. (“JPMC”) on December 22, 2021 (the “Credit Agreement”). The Credit Agreement, which will expire on December 21, 2026, provides a committed revolving credit line of $50.0 million and includes both a revolving loan and a letters of credit (“LCs”) component. Under the Credit Agreement, as of March 31, 2022, there were no revolving loans outstanding. In addition, under the LCs component, the Company utilized $20.4 million of the maximum allowable credit line of $25.0 million, which includes newly issued LCs, and previously issued and unexpired stand-by letters of credits (“SBLCs”) and certain non-expired commitments under the Company’s previous Loan and Pledge Agreement with Citibank, N.A. which are guaranteed under the Credit Agreement.

The following table presents the total outstanding LCs and SBLCs issued by the Company related to product warranty and performance guarantees.

	March 31, 2022		December 31, 2021
	(In thousands)
Outstanding letters of credit	$	13,124	$	13,960

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Commitments and Contingencies

3 Months Ended

Mar. 31, 2022

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Commitments and Contingencies

Warranty

The following table presents the changes in the Company’s accrued product warranty reserve.

	Three Months Ended March 31,
	2022		2021
	(In thousands)
Warranty reserve balance, beginning of year	$	879	$	760
Warranty costs charged to cost of revenue	125		127
Utilization charges against reserve	(5)		—
Release of accrual related to expired warranties	(85)		(76)
Warranty reserve balance, end of period	$	914	$	811

Litigation

From time-to-time, the Company has been named in and subject to various proceedings and claims in connection with its business. The Company may in the future become involved in litigation in the ordinary course of business, including litigation that could be material to its business. The Company considers all claims, if any, on a quarterly basis and, based on known facts, assesses whether potential losses are considered reasonably possible, probable and estimable. Based upon this assessment, the Company then evaluates disclosure requirements and whether to accrue for such claims in its consolidated financial statements. The Company records a provision for a liability when it is both probable that a liability has been incurred and the amount of the loss can be reasonably estimated. These provisions are reviewed at least quarterly and are adjusted to reflect the impacts of negotiations, settlements, rulings, advice of legal counsel and other information and events pertaining to a particular case. As of March 31, 2022, the Company was not involved in any lawsuits and there were no material losses which were probable or reasonably possible.

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Income Taxes

3 Months Ended

Mar. 31, 2022

Income Tax Disclosure [Abstract]

Income Taxes

Income Taxes

	Three Months Ended March 31,
	2022			2021
	(In thousands, except percentages)
Provision for (benefit from) income taxes	$	445		$	(640)
Discrete items	599			1,627
Provision for income taxes, excluding discrete items	$	1,044		$	987
Effective tax rate	5.3		%	(10.3		%)
Effective tax rate, excluding discrete items	12.5		%	15.8		%

The Company’s tax provision for interim periods is determined using an estimate of its annual effective tax rate, adjusted for discrete items, if any, that arise during the period. Each quarter, the Company updates its estimate of the annual effective tax rate, and if the estimated annual effective tax rate changes, the Company makes a cumulative adjustment in such period. The Company’s quarterly tax provision and estimate of its annual effective tax rate are subject to variation due to several factors, including variability in accurately predicting its pre-tax income or loss and the mix of jurisdictions to which they relate, intercompany transactions, the applicability of special tax regimes, and changes in how the Company does business.

For the three months ended March 31, 2022, the recognized income tax expense included a benefit primarily related to the U.S. federal foreign-derived intangible income (“FDII”) and federal research and development (“R&D”) tax credit, along with a discrete tax benefit due primarily to stock-based compensation windfalls. For the three months ended March 31, 2021, the recognized income tax benefit included the U.S. federal R&D tax credit along with a discrete tax benefit due primarily to stock-based compensation windfalls.

The effective tax rate excluding discrete items for the three months ended March 31, 2022, as compared to the three months ended March 31, 2021, was lower largely related to the FDII benefit projected for the 2022 fiscal year.

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Segment Reporting

3 Months Ended

Mar. 31, 2022

Segment Reporting [Abstract]

Segment Reporting

Segment ReportingThe Company’s chief operating decision-maker (“CODM”) is its chief executive officer. The Company continues to monitor and review its segment reporting structure in accordance with authoritative guidance to determine whether any changes have occurred that would impact its reportable segments.

The following table presents a summary of the Company’s financial information by segment and corporate operating expenses.

	Three Months Ended March 31, 2022						Three Months Ended March 31, 2021
	Water		Emerging Technologies		Total		Water		Emerging Technologies		Total
	(In thousands)
Revenue	$	32,516	$	30	$	32,546	$	28,940	$	—	$	28,940
Cost of revenue	9,480		18		9,498		8,981		—		8,981
Gross profit	23,036		12		23,048		19,959		—		19,959
Operating expenses
General and administrative	1,464		908		2,372		1,561		1,166		2,727
Sales and marketing	2,301		527		2,828		2,164		179		2,343
Research and development	800		4,111		4,911		501		4,001		4,502
Total operating expenses	4,565		5,546		10,111		4,226		5,346		9,572
Operating income (loss)	$	18,471	$	(5,534)	12,937		$	15,733	$	(5,346)	10,387
Less: Corporate operating expenses					4,715						4,243
Income from operations					$	8,222					$	6,144

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Concentrations

3 Months Ended

Mar. 31, 2022

Risks and Uncertainties [Abstract]

Concentrations

Concentrations

Revenue

The following table presents customers that account for 10% or more of the Company’s revenues. Although certain customers might account for greater than 10% of revenues at any one point in time, the concentration of revenue between a limited number of customers shifts regularly, depending on timing of shipments. The percentages by customer reflect specific relationships or contracts that would concentrate revenue for the periods presented and do not indicate a trend specific to any one customer.

	Three Months Ended March 31,
	2022	2021
Customer A	35%	**
Customer B	**	18%
Customer C	**	17%
Customer D	**	16%
Customer E	**	15%

**    Zero or less than 10%.

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Description of Business and Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2022

Accounting Policies [Abstract]

Basis of Presentation

Basis of Presentation

The Condensed Consolidated Financial Statements include the accounts of Energy Recovery, Inc. and its wholly-owned subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation.

The accompanying Condensed Consolidated Financial Statements have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission (the “SEC”). Certain information and footnote disclosures normally included in the financial statements prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) have been condensed or omitted pursuant to such rules and regulations. The December 31, 2021 Condensed Consolidated Balance Sheet was derived from audited financial statements and may not include all disclosures required by GAAP; however, the Company believes that the disclosures are adequate to make the information presented not misleading.

The March 31, 2022 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, 2021 included in the Company’s Annual Report on Form 10-K filed with the SEC on February 24, 2022 (the “2021 Annual Report”).

All adjustments consisting of 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.

Reclassifications

Reclassifications

Certain prior period amounts have been reclassified in the Condensed Consolidated Statements of Operations, Condensed Consolidated Statements of Cash Flows and certain notes to the Condensed Consolidated Financial Statements to conform to the current period presentation.

Use of Estimates

Use of Estimates

The preparation of Condensed Consolidated Financial Statements, in conformity with GAAP, requires the Company’s management to make judgments, assumptions and estimates that affect the amounts reported in the Condensed Consolidated Financial Statements and accompanying notes.

The accounting policies that reflect the Company’s more significant estimates and judgments and that the Company believes are the most critical to aid in fully understanding and evaluating its reported financial results are revenue recognition; valuation of stock options; valuation and impairment of goodwill; inventory; deferred taxes and valuation allowances on deferred tax assets; and evaluation and measurement of contingencies. Those estimates could change, and as a result, actual results could differ materially from those estimates.

Due to the novel coronavirus (“COVID-19”) pandemic and the Ukraine-Russia conflict, and the impact of these events and circumstances on the Company’s customers, there has been uncertainty and disruption in the global economy and financial markets. The Company is not aware of any specific event or circumstance that would require an update to its estimates or judgments or a revision of the carrying value of its assets or liabilities as of May 4, 2022, the date of issuance of this Quarterly Report on Form 10-Q. These estimates may change, as new events occur and additional information is obtained. Actual results could differ materially from these estimates under different assumptions or conditions. The Company undertakes no obligation to update publicly these estimates for any reason after the date of this Quarterly Report on Form 10-Q, except as required by law.

Recently Issued Accounting Pronouncement Not Yet Adopted

Recently Issued Accounting Pronouncement Not Yet AdoptedIn March 2020, the FASB issued ASU No. 2020-04, Reference Rate Reform (Topic 848) (“ASU 2020-04”), which provided optional expedients and exceptions for applying U.S. GAAP to contracts, hedging relationships, and other transactions affected by the discontinuation of the London Interbank Offered Rate (“LIBOR”) or by another reference rate expected to be discontinued. The FASB later issued ASU No. 2021-01, Reference Rate Reform (Topic 848): Scope, to clarify the scope of Topic 848 so that derivatives affected by the discounting transition are explicitly eligible for certain optional expedients and exceptions in Topic 848 (“ASU 2021-01”). Entities may apply the provisions of the new standards as of the beginning of the reporting period when the election is made (i.e., as early as the first quarter of 2020). Unlike other topics, the provisions of this update are only available until December 31, 2022, when the reference rate replacement activity is expected to have been completed. An entity may elect to apply amendments prospectively through December 31, 2022. The optional expedients were available to be used upon issuance of this guidance but the Company has not yet applied the guidance because the Company has not yet modified its existing contract for reference rate reform. The Company does not expect the provisions of ASU 2020-04 or ASU 2021-01 to have a material impact on its financial condition, results of operations, and cash flows.

Litigation

The Company considers all claims, if any, on a quarterly basis and, based on known facts, assesses whether potential losses are considered reasonably possible, probable and estimable. Based upon this assessment, the Company then evaluates disclosure requirements and whether to accrue for such claims in its consolidated financial statements. The Company records a provision for a liability when it is both probable that a liability has been incurred and the amount of the loss can be reasonably estimated. These provisions are reviewed at least quarterly and are adjusted to reflect the impacts of negotiations, settlements, rulings, advice of legal counsel and other information and events pertaining to a particular case.

Income Taxes

The Company’s tax provision for interim periods is determined using an estimate of its annual effective tax rate, adjusted for discrete items, if any, that arise during the period. Each quarter, the Company updates its estimate of the annual effective tax rate, and if the estimated annual effective tax rate changes, the Company makes a cumulative adjustment in such period. The Company’s quarterly tax provision and estimate of its annual effective tax rate are subject to variation due to several factors, including variability in accurately predicting its pre-tax income or loss and the mix of jurisdictions to which they relate, intercompany transactions, the applicability of special tax regimes, and changes in how the Company does business.

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Revenue (Tables)

3 Months Ended

Mar. 31, 2022

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

The following table presents the disaggregated revenues by segment, and within each segment, by product type, by primary geographical market based on the customer “shipped to” address, and by channel customers.

The Company classifies its channel customers as follows:

•Megaproject (“MPD”). MPD customers are major firms that develop, design, build, own and/or operate large-scale desalination plants.

•Original Equipment Manufacturer (“OEM”). OEM customers are companies that supply equipment, packaged systems, and various operating and maintenance solutions for small to medium-sized desalination plants, utilized by commercial and industrial entities, as well as national, state and local municipalities worldwide.

•Aftermarket (“AM”). AM customers are desalination plant owners and/or operators who can utilize our technology to upgrade or keep their plant running.

Sales and usage-based taxes are excluded from revenues. See Note 9, “Segment Reporting,” for further discussion related to the Company’s segments.

	Three Months Ended March 31, 2022						Three Months Ended March 31, 2021
	Water		Emerging Technologies		Total		Water		Emerging Technologies		Total
	(In thousands)
Product type
PXs, pumps and turbo devices, and other	$	32,516	$	30	$	32,546	$	28,940	$	—	$	28,940
Primary geographical market
Middle East and Africa	$	22,128	$	—	$	22,128	$	20,960	$	—	$	20,960
Asia	6,746		—		6,746		7,178		—		7,178
Americas	2,301		30		2,331		423		—		423
Europe	1,341		—		1,341		379		—		379
Total revenue	$	32,516	$	30	$	32,546	$	28,940	$	—	$	28,940
Channel
Megaproject	$	23,840	$	—	$	23,840	$	23,757	$	—	$	23,757
Original equipment manufacturer	4,671		—		4,671		2,791		—		2,791
Aftermarket	4,005		30		4,035		2,392		—		2,392
Total revenue	$	32,516	$	30	$	32,546	$	28,940	$	—	$	28,940

Contract with Customer, Asset and Liability

The following table presents contract balances by category.

	March 31, 2022		December 31, 2021
	(In thousands)
Accounts receivable, net	$	26,674	$	20,615
Contract assets, current (included in prepaid expenses and other assets)	792		493
Contract liabilities:
Contract liabilities, current	$	2,057	$	3,318
Contract liabilities, non-current (included in other liabilities, non-current)	67		88
Total contract liabilities	$	2,124	$	3,406

Contract With Customer, Contract Liability, Activity

The Company records contract liabilities, which consist of customer deposits and deferred revenue, when cash payments are received in advance of the Company’s performance. The following table presents significant changes in contract liabilities during the period.

	March 31, 2022		December 31, 2021
	(In thousands)
Contract liabilities, beginning of year	$	3,406	$	1,640
Revenue recognized	(2,510)		(1,415)
Cash received, excluding amounts recognized as revenue during the period	1,228		3,181
Contract liabilities, end of period	$	2,124	$	3,406

Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction

As of March 31, 2022, the following table presents the future estimated revenue by year expected to be recognized related to performance obligations that are unsatisfied or partially unsatisfied.

Year Recognized	Future Performance Obligations
	(In thousands)
2022 (remaining nine months)	$	9,282
2023	12,860
2024	1,472
Total	$	23,614

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Net Income Per Share - (Tables)

3 Months Ended

Mar. 31, 2022

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted

The following table presents the computation of basic and diluted net income per common share.

	Three Months Ended March 31,
	2022		2021
	(In thousands, except per share amounts)
Numerator
Net income	$	7,894	$	6,866
Denominator (weighted average shares)
Basic common shares outstanding	56,783		56,877
Dilutive stock awards	1,398		1,720
Diluted common shares outstanding	58,181		58,597
Net income per share
Basic	$	0.14	$	0.12
Diluted	$	0.14	$	0.12

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share

The following table presents the weighted potential common shares issuable under stock awards that were excluded from the computation of diluted net income per common share.

	Three Months Ended March 31,
	2022	2021
	(In thousands)
Anti-dilutive stock award shares	298	447

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Other Financial Information (Tables)

3 Months Ended

Mar. 31, 2022

Other Financial Information [Abstract]

Restrictions on Cash and Cash Equivalents

The following table presents a reconciliation of cash, cash equivalents and restricted cash(1) reported within the Condensed Consolidated Balance Sheets that sum to the total of such amounts presented.

	March 31, 2022		December 31, 2021		March 31, 2021
	(In thousands)
Cash and cash equivalents	$	44,520	$	74,358	$	105,431
Restricted cash, non-current (included in other assets, non-current)	103		103		103
Total cash, cash equivalents and restricted cash	$	44,623	$	74,461	$	105,534

(1)    The Company pledged and deposited cash amounts into restricted cash accounts in connection with the Company’s credit cards.

Schedule of Accounts, Notes, Loans and Financing Receivable

	March 31, 2022		December 31, 2021
	(In thousands)
Accounts receivable, gross	$	26,774	$	20,732
Allowance for doubtful accounts	(100)		(117)
Accounts receivable, net	$	26,674	$	20,615

Schedule of Inventories, Net

	March 31, 2022		December 31, 2021
	(In thousands)
Raw materials (1)	$	9,933	$	7,352
Work in process (1)	3,352		3,406
Finished goods (1)	10,865		10,274
Inventories, gross	24,150		21,032
Valuation adjustments for excess and obsolete inventory	(668)		(649)
Inventories, net	$	23,482	$	20,383

(1)Inventories are stated at the lower of cost or net realizable value, using the first-in, first-out method.

Schedule of Prepaid Expenses and Other Assets

Prepaid Expenses and Other Assets

	March 31, 2022		December 31, 2021
	(In thousands)
Contract assets	$	792	$	493
Cloud computing arrangement implementation costs	1,002		1,041
Supplier advances	2,700		1,717
Other prepaid expenses and other assets	2,100		1,824
Total prepaid expenses and other assets	$	6,594	$	5,075

Schedule of Intangible Assets and Goodwill

	March 31, 2022		December 31, 2021
	(In thousands)
Goodwill	$	12,790	$	12,790
Other intangible assets, net	34		37
Total goodwill and other intangible assets	$	12,824	$	12,827

Schedule of Accrued Liabilities

	March 31, 2022		December 31, 2021
	(In thousands)
Current
Payroll, incentives and commissions payable	$	4,293	$	10,170
Warranty reserve	914		879
Other accrued expenses and other liabilities	2,886		2,945
Total accrued expenses and other liabilities	8,093		13,994
Other liabilities, non-current	226		247
Total accrued expenses, and current and non-current other liabilities	$	8,319	$	14,241

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Investments and Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2022

Investments, Fair Value Disclosure [Abstract]

Schedule of Amortized Cost and Fair Value of Available for Sale Securities

The following table presents the Company’s financial assets measured on a recurring basis by contractual maturity, including pricing category, amortized cost, gross unrealized gains and losses, and fair value.

		March 31, 2022								December 31, 2021
	Pricing Category	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value		Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
		(In thousands)
Cash equivalents
Money market securities	Level 1	$	27,084	$	—	$	—	$	27,084	$	50,865	$	—	$	—	$	50,865
Short-term and long-term investments
Corporate notes and bonds – short-term	Level 2	37,873		—		(171)		37,702		31,371		—		(39)		31,332
Corporate notes and bonds – long-term	Level 2	14,540		—		(206)		14,334		2,307		—		(9)		2,298
Total short and long-term investments		52,413		—		(377)		52,036		33,678		—		(48)		33,630
Total		$	79,497	$	—	$	(377)	$	79,120	$	84,543	$	—	$	(48)	$	84,495

Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value

The following table presents a summary of the fair value and gross unrealized losses on the available-for-sale securities that have been in a continuous unrealized loss position, aggregated by type of investment instrument. The available-for-sale securities that were in an unrealized gain position have been excluded from the table.

	March 31, 2022				December 31, 2021
	Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses
	(In thousands)
Corporate notes and bonds	$	52,036	$	(377)	$	33,630	$	(48)

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Lines of Credit (Tables)

3 Months Ended

Mar. 31, 2022

Debt Disclosure [Abstract]

Schedule of Debt

The following table presents the total outstanding LCs and SBLCs issued by the Company related to product warranty and performance guarantees.

	March 31, 2022		December 31, 2021
	(In thousands)
Outstanding letters of credit	$	13,124	$	13,960

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Commitments and Contingencies (Tables)

3 Months Ended

Mar. 31, 2022

Commitments and Contingencies Disclosure [Abstract]

Schedule of Product Warranty Liability

The following table presents the changes in the Company’s accrued product warranty reserve.

	Three Months Ended March 31,
	2022		2021
	(In thousands)
Warranty reserve balance, beginning of year	$	879	$	760
Warranty costs charged to cost of revenue	125		127
Utilization charges against reserve	(5)		—
Release of accrual related to expired warranties	(85)		(76)
Warranty reserve balance, end of period	$	914	$	811

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Income Taxes (Tables)

3 Months Ended

Mar. 31, 2022

Income Tax Disclosure [Abstract]

Schedule of Components of Income Tax Expense (Benefit)

	Three Months Ended March 31,
	2022			2021
	(In thousands, except percentages)
Provision for (benefit from) income taxes	$	445		$	(640)
Discrete items	599			1,627
Provision for income taxes, excluding discrete items	$	1,044		$	987
Effective tax rate	5.3		%	(10.3		%)
Effective tax rate, excluding discrete items	12.5		%	15.8		%

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Segment Reporting (Tables)

3 Months Ended

Mar. 31, 2022

Segment Reporting [Abstract]

Reconciliation of Operating Profit (Loss) from Segments to Consolidated

The following table presents a summary of the Company’s financial information by segment and corporate operating expenses.

	Three Months Ended March 31, 2022						Three Months Ended March 31, 2021
	Water		Emerging Technologies		Total		Water		Emerging Technologies		Total
	(In thousands)
Revenue	$	32,516	$	30	$	32,546	$	28,940	$	—	$	28,940
Cost of revenue	9,480		18		9,498		8,981		—		8,981
Gross profit	23,036		12		23,048		19,959		—		19,959
Operating expenses
General and administrative	1,464		908		2,372		1,561		1,166		2,727
Sales and marketing	2,301		527		2,828		2,164		179		2,343
Research and development	800		4,111		4,911		501		4,001		4,502
Total operating expenses	4,565		5,546		10,111		4,226		5,346		9,572
Operating income (loss)	$	18,471	$	(5,534)	12,937		$	15,733	$	(5,346)	10,387
Less: Corporate operating expenses					4,715						4,243
Income from operations					$	8,222					$	6,144

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Concentrations (Tables)

3 Months Ended

Mar. 31, 2022

Risks and Uncertainties [Abstract]

Schedules of Concentration of Risk, by Risk Factor

The following table presents customers that account for 10% or more of the Company’s revenues. Although certain customers might account for greater than 10% of revenues at any one point in time, the concentration of revenue between a limited number of customers shifts regularly, depending on timing of shipments. The percentages by customer reflect specific relationships or contracts that would concentrate revenue for the periods presented and do not indicate a trend specific to any one customer.

	Three Months Ended March 31,
	2022	2021
Customer A	35%	**
Customer B	**	18%
Customer C	**	17%
Customer D	**	16%
Customer E	**	15%

**    Zero or less than 10%.

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Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Disaggregation of Revenue [Line Items]
Revenue	$ 32,546	$ 28,940
Water
Disaggregation of Revenue [Line Items]
Revenue	32,516	28,940
Emerging Technologies
Disaggregation of Revenue [Line Items]
Revenue	30	0
Middle East and Africa
Disaggregation of Revenue [Line Items]
Revenue	22,128	20,960
Middle East and Africa | Water
Disaggregation of Revenue [Line Items]
Revenue	22,128	20,960
Middle East and Africa | Emerging Technologies
Disaggregation of Revenue [Line Items]
Revenue	0	0
Asia
Disaggregation of Revenue [Line Items]
Revenue	6,746	7,178
Asia | Water
Disaggregation of Revenue [Line Items]
Revenue	6,746	7,178
Asia | Emerging Technologies
Disaggregation of Revenue [Line Items]
Revenue	0	0
Americas
Disaggregation of Revenue [Line Items]
Revenue	2,331	423
Americas | Water
Disaggregation of Revenue [Line Items]
Revenue	2,301	423
Americas | Emerging Technologies
Disaggregation of Revenue [Line Items]
Revenue	30	0
Europe
Disaggregation of Revenue [Line Items]
Revenue	1,341	379
Europe | Water
Disaggregation of Revenue [Line Items]
Revenue	1,341	379
Europe | Emerging Technologies
Disaggregation of Revenue [Line Items]
Revenue	0	0
PX Pressure Exchangers, turbochargers, pumps and other devices
Disaggregation of Revenue [Line Items]
Revenue	32,546	28,940
PX Pressure Exchangers, turbochargers, pumps and other devices | Water
Disaggregation of Revenue [Line Items]
Revenue	32,516	28,940
PX Pressure Exchangers, turbochargers, pumps and other devices | Emerging Technologies
Disaggregation of Revenue [Line Items]
Revenue	30	0
PX Pressure Exchangers, turbochargers, pumps and other devices | Megaproject
Disaggregation of Revenue [Line Items]
Revenue	23,840	23,757
PX Pressure Exchangers, turbochargers, pumps and other devices | Megaproject | Water
Disaggregation of Revenue [Line Items]
Revenue	23,840	23,757
PX Pressure Exchangers, turbochargers, pumps and other devices | Megaproject | Emerging Technologies
Disaggregation of Revenue [Line Items]
Revenue	0	0
PX Pressure Exchangers, turbochargers, pumps and other devices | Original equipment manufacturer
Disaggregation of Revenue [Line Items]
Revenue	4,671	2,791
PX Pressure Exchangers, turbochargers, pumps and other devices | Original equipment manufacturer | Water
Disaggregation of Revenue [Line Items]
Revenue	4,671	2,791
PX Pressure Exchangers, turbochargers, pumps and other devices | Original equipment manufacturer | Emerging Technologies
Disaggregation of Revenue [Line Items]
Revenue	0	0
PX Pressure Exchangers, turbochargers, pumps and other devices | Aftermarket
Disaggregation of Revenue [Line Items]
Revenue	4,035	2,392
PX Pressure Exchangers, turbochargers, pumps and other devices | Aftermarket | Water
Disaggregation of Revenue [Line Items]
Revenue	4,005	2,392
PX Pressure Exchangers, turbochargers, pumps and other devices | Aftermarket | Emerging Technologies
Disaggregation of Revenue [Line Items]
Revenue	$ 30	$ 0

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Revenue - Contract Assets and Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Revenue from Contract with Customer [Abstract]
Accounts receivable, net	$ 26,674	$ 20,615
Contract assets, current (included in prepaid expenses and other assets)	792	493
Contract liabilities:
Contract liabilities, current	2,057	3,318
Contract liabilities, non-current (included in other liabilities, non-current)	67	88
Total contract liabilities	$ 2,124	$ 3,406	$ 1,640

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Revenue - Significant Changes in Contract Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Contract With Customer, Liability [Roll Forward]
Contract liabilities, beginning of year	$ 3,406	$ 1,640
Revenue recognized	(2,510)	(1,415)
Cash received, excluding amounts recognized as revenue during the period	1,228	3,181
Contract liabilities, end of period	$ 2,124	$ 3,406

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Revenue - Remaining Performance Obligation (Details) $ in Thousands	Mar. 31, 2022 USD ($)
Revenue from Contract with Customer [Abstract]
Performance obligations expected to be satisfied	$ 23,614
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-04-01
Revenue from Contract with Customer [Abstract]
Performance obligations expected to be satisfied	$ 9,282
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligations expected to be satisfied, expected timing	9 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue from Contract with Customer [Abstract]
Performance obligations expected to be satisfied	$ 12,860
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligations expected to be satisfied, expected timing	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Revenue from Contract with Customer [Abstract]
Performance obligations expected to be satisfied	$ 1,472
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligations expected to be satisfied, expected timing	1 year

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Net Income Per Share - Computation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Numerator
Net income	$ 7,894	$ 6,866
Denominator (weighted average shares)
Basic common shares outstanding (in shares)	56,783	56,877
Dilutive stock awards (in shares)	1,398	1,720
Diluted common shares outstanding (in shares)	58,181	58,597
Net income per share
Basic (in dollars per share)	$ 0.14	$ 0.12
Diluted (in dollars per share)	$ 0.14	$ 0.12

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Net Income Per Share - Antidilutive Securities Excluded From Computation of Diluted Earnings Per Share (Details) - shares shares in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Earnings Per Share [Abstract]
Anti-dilutive stock awards (in shares)	298	447

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Other Financial Information - Cash, Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020
Other Financial Information [Abstract]
Cash and cash equivalents	$ 44,520	$ 74,358	$ 105,431
Restricted cash, non-current (included in other assets, non-current)	103	103	103
Total cash, cash equivalents and restricted cash	$ 44,623	$ 74,461	$ 105,534	$ 94,358

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Other Financial Information - Accounts Receivable (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Other Financial Information [Abstract]
Accounts receivable, gross	$ 26,774	$ 20,732
Allowance for doubtful accounts	(100)	(117)
Accounts receivable, net	$ 26,674	$ 20,615

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Other Financial Information - Inventories (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Other Financial Information [Abstract]
Raw materials	$ 9,933	$ 7,352
Work in process	3,352	3,406
Finished goods	10,865	10,274
Inventories, gross	24,150	21,032
Valuation adjustments for excess and obsolete inventory	(668)	(649)
Inventories, net	$ 23,482	$ 20,383

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Other Financial Information - Prepaid Expenses and Other Current Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Other Financial Information [Abstract]
Contract assets	$ 792	$ 493
Cloud computing arrangement implementation costs	1,002	1,041
Supplier advances	2,700	1,717
Other prepaid expenses and other assets	2,100	1,824
Total prepaid expenses and other assets	$ 6,594	$ 5,075

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Other Financial Information - Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Other Financial Information [Abstract]
Goodwill	$ 12,790	$ 12,790
Other intangible assets, net	34	37
Total goodwill and other intangible assets	$ 12,824	$ 12,827

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Other Financial Information - Accrued Expenses and Other Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020
Current
Payroll, incentives and commissions payable	$ 4,293	$ 10,170
Warranty reserve	914	879	$ 811	$ 760
Other accrued expenses and other liabilities	2,886	2,945
Total accrued expenses and other liabilities	8,093	13,994
Non-current
Other liabilities, non-current	226	247
Total accrued expenses, and current and non-current other liabilities	$ 8,319	$ 14,241

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Investments and Fair Value Measurements - Financial Assets Measured on Recurring Basis (Details) - USD ($)	Mar. 31, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale, Unrealized Gain (Loss) [Abstract]
Amortized Cost	$ 79,497,000	$ 84,543,000
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(377,000)	(48,000)
Fair Value	79,120,000	84,495,000
Transfer between Level 1 and Level 2	0
Total short and long-term investments
Debt Securities, Available-for-sale, Unrealized Gain (Loss) [Abstract]
Amortized Cost	52,413,000	33,678,000
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(377,000)	(48,000)
Fair Value	52,036,000	33,630,000
Level 1 | Cash equivalents | Money market securities
Debt Securities, Available-for-sale, Unrealized Gain (Loss) [Abstract]
Amortized Cost	27,084,000	50,865,000
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	27,084,000	50,865,000
Level 2 | Short-term investments | Corporate notes and bonds
Debt Securities, Available-for-sale, Unrealized Gain (Loss) [Abstract]
Amortized Cost	37,873,000	31,371,000
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(171,000)	(39,000)
Fair Value	37,702,000	31,332,000
Level 2 | Long-term investments | Corporate notes and bonds
Debt Securities, Available-for-sale, Unrealized Gain (Loss) [Abstract]
Amortized Cost	14,540,000	2,307,000
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(206,000)	(9,000)
Fair Value	14,334,000	2,298,000
Measured On Recurring Basis
Debt Securities, Available-for-sale, Unrealized Gain (Loss) [Abstract]
Total fair value of financial liabilities	0	0
Measured On Recurring Basis | Level 3
Debt Securities, Available-for-sale, Unrealized Gain (Loss) [Abstract]
Total fair value of financial assets	$ 0	$ 0

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Investments and Fair Value Measurements - Gross Unrealized Losses and Fair Values of Investments (Details) - Corporate notes and bonds - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Fair Value	$ 52,036	$ 33,630
Gross Unrealized Losses	$ (377)	$ (48)

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Lines of Credit (Details) - USD ($)	Mar. 31, 2022	Dec. 31, 2021	Dec. 22, 2021
Letter of Credit | Committed Revolving Credit Line | JP Morgan Chase Bank, N.A.
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 25,000,000
Standby Letters of Credit
Line of Credit Facility [Line Items]
Outstanding letters of credit	13,124,000	$ 13,960,000
Line of Credit | Committed Revolving Credit Line | JP Morgan Chase Bank, N.A.
Line of Credit Facility [Line Items]
Maximum borrowing capacity			$ 50,000,000
Line of Credit | Letter of Credit | Committed Revolving Credit Line | JP Morgan Chase Bank, N.A.
Line of Credit Facility [Line Items]
Outstanding letters of credit	20,400,000
Line of Credit | Revolving Credit Facility | Committed Revolving Credit Line
Line of Credit Facility [Line Items]
Long-term debt	$ 0

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Commitments and Contingencies - Product Warranty Liability (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Movement in Standard Product Warranty Accrual [Roll Forward]
Warranty reserve balance, beginning of year	$ 879	$ 760
Warranty costs charged to cost of revenue	125	127
Utilization charges against reserve	(5)	0
Release of accrual related to expired warranties	(85)	(76)
Warranty reserve balance, end of period	$ 914	$ 811

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Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Income Tax Disclosure [Abstract]
Provision for (benefit from) income taxes	$ 445	$ (640)
Discrete items	599	1,627
Provision for income taxes, excluding discrete items	$ 1,044	$ 987
Effective tax rate	5.30%	(10.30%)
Effective tax rate, excluding discrete items	12.50%	15.80%

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Segment Reporting - Summary of Financial Information by Segment (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Segment Reporting Information [Line Items]
Revenue	$ 32,546	$ 28,940
Cost of revenue	9,498	8,981
Gross profit	23,048	19,959
Operating expenses:
General and administrative	6,551	6,610
Sales and marketing	3,364	2,703
Research and development	4,911	4,502
Total operating expenses	14,826	13,815
Income from operations	8,222	6,144
Water
Segment Reporting Information [Line Items]
Revenue	32,516	28,940
Emerging Technologies
Segment Reporting Information [Line Items]
Revenue	30	0
Operating Segments
Segment Reporting Information [Line Items]
Revenue	32,546	28,940
Cost of revenue	9,498	8,981
Gross profit	23,048	19,959
Operating expenses:
General and administrative	2,372	2,727
Sales and marketing	2,828	2,343
Research and development	4,911	4,502
Total operating expenses	10,111	9,572
Income from operations	12,937	10,387
Operating Segments | Water
Segment Reporting Information [Line Items]
Revenue	32,516	28,940
Cost of revenue	9,480	8,981
Gross profit	23,036	19,959
Operating expenses:
General and administrative	1,464	1,561
Sales and marketing	2,301	2,164
Research and development	800	501
Total operating expenses	4,565	4,226
Income from operations	18,471	15,733
Operating Segments | Emerging Technologies
Segment Reporting Information [Line Items]
Revenue	30	0
Cost of revenue	18	0
Gross profit	12	0
Operating expenses:
General and administrative	908	1,166
Sales and marketing	527	179
Research and development	4,111	4,001
Total operating expenses	5,546	5,346
Income from operations	(5,534)	(5,346)
Corporate
Operating expenses:
Total operating expenses	$ 4,715	$ 4,243

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Concentrations (Details) - Water - Revenue from Contract with Customer Benchmark - Customer Concentration Risk	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Customer A
Concentration Risk [Line Items]
Percentage of product revenue	35.00%
Customer B
Concentration Risk [Line Items]
Percentage of product revenue		18.00%
Customer C
Concentration Risk [Line Items]
Percentage of product revenue		17.00%
Customer D
Concentration Risk [Line Items]
Percentage of product revenue		16.00%
Customer E
Concentration Risk [Line Items]
Percentage of product revenue		15.00%