Exhibit 99.1




erilogoh.jpg
Energy Recovery Reports
Fiscal Year End 2017 Financial Results

SAN LEANDRO, Calif., March 7, 2018 - Energy Recovery Inc. (NASDAQ:ERII) (“Energy Recovery” or the “Company”), the leader in pressure energy technology for industrial fluid flows, today announced its financial results for the fiscal year and fourth quarter ended on December 31, 2017.

Full Year Summary:
Total revenue of $63.2 million, an increase of 15% year-over-year
Product gross margin of 67.2%
Total gross margin(1) of 69.8%
Net income of $12.4 million, or $0.22 per diluted share

Fourth Quarter Summary:
Total revenue of $22.4 million, an increase of 25% year-over-year
Product gross margin of 68.5%
Total gross margin(1) of 70.2%
Net income of $11.6 million, or $0.21 per diluted share

President and CEO Chris Gannon remarked, “2017 was a record year for the company, setting all-time highs in revenue in both our Water and Oil & Gas segments, as well as achieving record full year product and total gross margins(1). We believe that the current expansion phase in the desalination business cycle will continue throughout 2018. Cash-generation from our core business helps fund advanced R&D initiatives - the next platform for sustained growth for the company.”

Mr. Gannon continued, “The long-term strategy of Energy Recovery remains unchanged. Our primary goals are 1) desalination market leadership, 2) commercialization of VorTeqTM, 3) further development of MTeqTM, and 4) continuous innovation of our core PX technology. The dedicated efforts of our sales team continues to drive top line growth, while our operations team continues to maximize manufacturing efficiencies to generate increased profitability. Our engineering team is tirelessly and methodically improving the VorTeq and MTeq systems. Our balance sheet remains strong and the company has never been in a better position to deliver value to our shareholders.”

Mr. Gannon concluded, “Through the observations and lessons learned from testing to-date, we have identified specific enhancements to the VorTeq system and are working toward implementation. Based on the current component delivery, testing and assembly schedules, we expect to make material progress towards commercialization throughout 2018. We will provide further detail during our conference call on March 8th, 2018.”


Revenues

For the fiscal year ended December 31, 2017, the Company generated total revenue of $63.2 million. Total revenue for fiscal year ended December 31, 2017 increased by $8.4 million, or 15%, from $54.7 million in the fiscal year ended December 31, 2016. Of the $8.4 million increase in total revenue, $6.8 million was attributable to the Water segment and $1.7 million was attributable to the Oil & Gas segment.

The Water segment generated total product revenue of $54.3 million for fiscal year ended December 31, 2017, compared to $47.5 million for fiscal year ended December 31, 2016. The $6.8 million, or 14% increase in product revenue was due to higher Mega Project (“MPD”) and Original Equipment Manufacturer (“OEM”) shipments in 2017.






The Oil & Gas segment generated total revenue of $8.9 million for fiscal year ended December 31, 2017, compared to $7.2 million for fiscal year ended December 31, 2016. The $1.7 million, or 24% increase in revenue was due to higher percentage-of-completion (“PoC”) revenue recognition associated with the sale of multiple IsoBoost® systems as compared to 2016. License and development revenue of $5.0 million was recognized in both 2017 and 2016.

For the fourth quarter of 2017, the Company generated total revenue of $22.4 million. Revenue increased by $4.5 million, or 25%, from $17.9 million in the fourth quarter of 2016. Of the $4.5 million increase in revenue, $5.6 million was attributed to an increase in Water segment revenue due to higher MPD and OEM shipments in the fourth quarter of 2017, offset by a $1.1 million decrease in the Oil & Gas segment revenue due to lower PoC revenue recognition associated with the aforementioned sale of multiple IsoBoost systems. License and development revenue of $1.25 million was recognized in each of the fourth quarters of 2017 and 2016, respectively.


Gross Margin

For the fiscal year ended December 31, 2017, product gross margin was 67.2%. Product gross margin increased by 310 basis points from 64.1% in 2016. This increase was largely driven by, favorable price and product mix, manufacturing efficiencies, and higher production levels in the Water segment. Including license and development revenue, total gross margin(1) was 69.8% for fiscal year ended December 31, 2017. Total gross margin(1) increased 240 basis points from 67.4% in 2016.

The Water segment generated product gross margin of 70.5% for the fiscal year ended December 31, 2017. Water segment product gross margin increased by 490 basis points, compared to 65.6% in 2016. This increase was largely driven by favorable price and product mix, manufacturing efficiencies, and higher production levels in 2017.

The Oil & Gas segment generated product gross margin of 21.4% for the fiscal year ended December 31, 2017, compared to 31.1% in 2016. This decrease was attributable to higher project costs and revenue adjustments. Including license and development revenue, the Oil & Gas segment total gross margin(1) for fiscal year ended December 31, 2017 was 65.8%.

For the fourth quarter of 2017, product gross margin was 68.5%. Product gross margin increased by 430 basis points from 64.2% in the fourth quarter of 2016. This increase was largely driven by favorable price and product mix, and manufacturing efficiencies in the Water segment. Including license and development revenue, total gross margin(1) was 70.2% for the fourth quarter of 2017. Total gross margin(1) increased 350 basis points from 66.7% in the fourth quarter of 2016.


Operating Expenses

For the fiscal year ended December 31, 2017, operating expenses were $40.8 million, an increase of $4.3 million from $36.5 million for fiscal year ended December 31, 2016. The increase in operating expenses was primarily due to increases in the Oil & Gas and Water segments.

The Water segment operating expenses for fiscal year ended December 31, 2017 were $8.9 million, an increase of $0.8 million from $8.1 million for fiscal year ended December 31, 2016. This increase was driven by higher sales and marketing expenses associated with increased Water segment sales.

The Oil & Gas segment operating expenses for fiscal year ended December 31, 2017 were $16.0 million, an increase of $3.3 million from $12.7 million for fiscal year ended December 31, 2016. This increase was driven by the Company’s continued investment in research and development activities.

The Corporate segment operating expenses of $15.9 million for fiscal year ended December 31, 2017 were $200 thousand higher than the fiscal year ended December 31, 2016.

For the fourth quarter of 2017, operating expenses were $12.7 million, an increase of $3.4 million from $9.3 million for fourth quarter of 2016. This increase in operating expenses was primarily due to continued investment in research and development activities in the Oil & Gas segment and higher sales and marketing expenses in Water segment.







Bottom Line Summary

To summarize our financial performance, on a full year basis, the Company reported a net income of $12.4 million, or $0.22 per diluted share, compared to a net income of $1.0 million, or $0.02 per diluted share in 2016. This increase was driven by a tax benefit of $8.4 million, which included a net release of tax valuation allowance, a one-time tax expense related to the 2017 Tax Cuts and Jobs Act, and other tax adjustments. Excluding the tax benefit, net income for fiscal year ended December 31, 2017 was $0.07 per diluted share.

On a quarterly basis, the Company reported a net income of $11.6 million, or $0.21 per diluted share for the fourth quarter of 2017, compared to a net income of$3.1 million, or $0.06 per diluted share for the fourth quarter of 2016. As noted above, this increase was driven by a tax benefit of $8.4 million.  Excluding the tax benefit, net income for the fourth quarter of 2017 was $0.06 per diluted share.


Cash Flow Highlights

The Company ended the quarter with unrestricted cash of $27.8 million, current and non-current restricted cash of $2.8 million, and short-term investments of $70.0 million, all of which represent a combined total of $100.6 million.

For the fiscal year ended December 31, 2017, the Company’s net cash provided by operating activities was $2.9 million driven by $12.4 million of net income, offset by $5.0 million amortization of the VorTeqTM License Agreement exclusivity fee, $4.1 million increase in working capital, and $0.4 million of non-cash adjustments, the largest of which were $8.9 million of income related to deferred income taxes, $4.1 million of share-based compensation, and $3.7 million of depreciation and amortization. Cash used in investing activities was $37.4 million driven by $31.5 million of net purchases of marketable securities and $7.4 million of capital expenditures, partially offset by a decrease in restricted cash of $1.5 million. Cash provided by financing activities was $0.9 million, driven by $5.5 million collected from the issuance of common stock related to option exercises, partially offset by $4.3 million in repurchases of common stock and $0.3 million in vested restricted shares withheld for tax withholdings


Forward-Looking Statements

Certain matters discussed in this press release and on the conference call are “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended, including the Company’s belief that the current expansion phase in the desalination business cycle will continue through 2018, and the Company’s belief that it will make material progress towards commercialization of the VorTeq system throughout 2018. These forward-looking statements are based on information currently available to us and on management’s beliefs, assumptions, estimates, or projections and are not guarantees of future events or results. Potential risks and uncertainties include our ability to achieve the milestones under the VorTeq license agreement, any other factors that may have been discussed herein regarding the risks and uncertainties of our business, and the risks discussed under “Risk Factors” in our Form 10-K filed with the U.S. Securities and Exchange Commission (“SEC”) for the year ended December 31, 2017 as well as other reports filed by the Company with the SEC from time to time. Because such forward-looking statements involve risks and uncertainties, the Company’s actual results may differ materially from the predictions in these forward-looking statements. All forward-looking statements are made as of today, and the Company assumes no obligation to update such statements.







Use of Non-GAAP Financial Measures

This press release includes certain non-GAAP financial measures, including total gross margin. Generally, a non-GAAP financial measure is a numerical measure of a company’s performance, financial position, or cash flows that either exclude or include amounts that are not normally excluded or included in the most directly comparable measure calculated and presented in accordance with generally accepted accounting principles in the United States of America, or GAAP. These non-GAAP financial measures do not reflect a comprehensive system of accounting, differ from GAAP measures with the same captions, and may differ from non-GAAP financial measures with the same or similar captions that are used by other companies. As such, these non-GAAP measures should be considered as a supplement to, and not as a substitute for, or superior to, financial measures calculated in accordance with GAAP. The Company uses these non-GAAP financial measures to analyze its operating performance and future prospects, develop internal budgets and financial goals, and to facilitate period-to-period comparisons. The Company believes these non-GAAP financial measures reflect an additional way of viewing aspects of its operations that, when viewed with its GAAP results, provide a more complete understanding of factors and trends affecting its business.

(1) 
“Total gross margin” is a non-GAAP financial measure. Please refer to the discussion under headings “Use of Non-GAAP Financial Measures” and “Reconciliations of Non-GAAP Financial Measures.”

Conference Call to Discuss Fourth Quarter and Fiscal Year 2017 Financial Results

LIVE CONFERENCE CALL:
Thursday, March 8, 2018, 7:00 AM PST / 10:00 AM EST
Listen-only, US / Canada Toll-free: 877-709-8150
Listen-only, Local / International Toll: (+1) 201-689-8354
Access code: 13676918
CONFERENCE CALL REPLAY:
Expiration: Sunday, April 8, 2018
US / Canada Toll-free: 877-660-6853
Local / International Toll: (+1) 201-612-7415
Access code: 13676918
Investors may also access the live call or the replay over the internet at ir.energyrecovery.com. The replay will be available approximately three hours after the live call concludes.

Disclosure Information

Energy Recovery uses the investor relations section on its website as means of complying with its disclosure obligations under Regulation FD. Accordingly, investors should monitor Energy Recovery’s investor relations website in addition to following Energy Recovery’s press releases, SEC filings, and public conference calls and webcasts.

About Energy Recovery Inc.

Energy Recovery, Inc. (ERII) is an energy solutions provider to industrial fluid flow markets worldwide. Energy Recovery solutions recycle and convert wasted pressure energy into a usable asset and preserve pumps that are subject to hostile processing environments. With award-winning technology, Energy Recovery simplifies complex industrial systems while improving productivity, profitability, and efficiency within the oil & gas, chemical processing, and water industries. Energy Recovery products save clients more than $1.8 billion (USD) annually. Headquartered in the Bay Area, Energy Recovery has offices in Houston, Ireland, Shanghai, and Dubai. For more information about the Company, please visit www.energyrecovery.com.

Contact

Brian Uhlmer
buhlmer@energyrecovery.com
(713) 858-2284





ENERGY RECOVERY, INC.
CONSOLIDATED BALANCE SHEETS
(In thousands, except share data and par value)
(Unaudited)
 
December 31,
 
2017
 
2016
ASSETS
 
 
 
Current assets:
 
 
 
Cash and cash equivalents
$
27,780

 
$
61,364

Restricted cash
2,664

 
2,297

Short-term investments
70,020

 
39,073

Accounts receivable, net of allowance for doubtful accounts of $103 and $130 at December 31, 2017 and 2016, respectively
12,465

 
11,759

Unbilled receivables, current
1,413

 
190

Cost and estimated earnings in excess of billings
4,998

 
1,825

Inventories
5,514

 
4,550

Prepaid expenses and other current assets
1,342

 
1,311

Total current assets
126,196

 
122,369

Restricted cash, non-current
182

 
2,087

Deferred tax assets, non-current
7,902

 
1,270

Property and equipment, net
13,393

 
8,643

Goodwill
12,790

 
12,790

Other intangible assets, net
1,269

 
1,900

Other assets, non-current
12

 
4

Total assets
$
161,744

 
$
149,063

LIABILITIES AND STOCKHOLDERS’ EQUITY
 
 
 
Current liabilities:
 
 
 
Accounts payable
$
4,091

 
$
1,505

Accrued expenses and other current liabilities
9,322

 
9,019

Income taxes payable
432

 
16

Accrued warranty reserve
366

 
406

Deferred revenue, current
5,611

 
6,201

Current portion of long-term debt
11

 
11

Total current liabilities
19,833

 
17,158

Long-term debt, less current portion
16

 
27

Deferred tax liabilities, non-current

 
2,233

Deferred revenue, non-current
59,006

 
63,958

Other non-current liabilities
358

 
554

Total liabilities
79,213

 
83,930

Commitments and Contingencies (Note 8)

 

Stockholders’ equity:
 
 
 
Preferred stock, $0.001 par value; 10,000,000 shares authorized; no shares issued or outstanding at December 31, 2017 and 2016

 

Common stock, $0.001 par value; 200,000,000 shares authorized; 58,168,433 shares issued and 53,905,600 shares outstanding at December 31, 2017 and 56,884,207 shares issued and 53,162,551 shares outstanding at December 31, 2016
58

 
57

Additional paid-in capital
149,006

 
139,676

Accumulated comprehensive loss
(125
)
 
(118
)
Treasury stock, at cost, 4,262,833 shares repurchased at December 31, 2017 and 3,721,656 shares repurchased at December 31, 2016
(20,486
)
 
(16,210
)
Accumulated deficit
(45,922
)
 
(58,272
)
Total stockholders’ equity
82,531

 
65,133

Total liabilities and stockholders’ equity
$
161,744

 
$
149,063







ENERGY RECOVERY, INC.
CONSOLIDATED STATEMENTS OF OPERATIONS
(In thousands, except per share data)
(Unaudited)
 
Years Ended December 31,
 
2017
 
2016
 
2015
Product revenue
$
58,156

 
$
49,715

 
$
43,671

Product cost of revenue
19,061

 
17,849

 
19,111

Product gross profit
39,095

 
31,866

 
24,560

 
 
 
 
 
 
License and development revenue
5,000

 
5,000

 
1,042

 
 
 
 
 
 
Operating expenses:
 
 
 
 
 
General and administrative
17,354

 
16,626

 
19,773

Sales and marketing
9,391

 
9,116

 
9,326

Research and development
13,443

 
10,136

 
7,659

Amortization of intangible assets
631

 
631

 
635

Total operating expenses
40,819

 
36,509

 
37,393

Income (loss) from operations
3,276

 
357

 
(11,791
)
 
 
 
 
 
 
Other income (expense):
 
 
 
 
 
Interest income
870

 
309

 
53

Interest expense
(2
)
 
(3
)
 
(42
)
Other non-operating expense, net
(188
)
 
(19
)
 
(192
)
Total other income (expense), net
680

 
287

 
(181
)
Income (loss) before income taxes
3,956

 
644

 
(11,972
)
Benefit from income taxes
(8,394
)
 
(390
)
 
(334
)
Net income (loss)
$
12,350

 
$
1,034

 
$
(11,638
)
 
 
 
 
 
 
Income (loss) per share:
 
 
 
 
 
Basic
$
0.23

 
$
0.02

 
$
(0.22
)
Diluted
$
0.22

 
$
0.02

 
$
(0.22
)
 
 
 
 
 
 
Number of shares used in per share calculations:
 
 
 
 
 
Basic
53,701

 
52,341

 
52,151

Diluted
55,612

 
55,451

 
52,151







ENERGY RECOVERY, INC.
CONSOLIDATED STATEMENTS OF CASH FLOWS
(In thousands)
(Unaudited)
 
Years Ended December 31,
 
2017
 
2016
 
2015
Cash Flows From Operating Activities:
 
 
 
 
 
Net income (loss)
$
12,350

 
$
1,034

 
$
(11,638
)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
 
 
 
 
 
Stock-based compensation
4,087

 
3,263

 
4,059

Depreciation and amortization
3,666

 
3,680

 
3,838

Amortization of premiums on investments
460

 
174

 
162

Provision for warranty claims
246

 
208

 
135

Reversal of accruals related to expired warranties
(200
)
 
(236
)
 
(395
)
Unrealized loss on foreign currency translation
144

 
13

 
1

Provision for doubtful accounts
55

 
76

 
112

Adjustments for excess or obsolete inventory
201

 
(361
)
 
(250
)
Deferred income taxes
(8,865
)
 
(459
)
 
(326
)
Other non-cash adjustments
(196
)
 
(131
)
 
23

Changes in operating assets and liabilities:
 
 
 
 
 
Accounts receivable
(761
)
 
(244
)
 
(743
)
Unbilled receivables
(1,223
)
 
1,695

 
(128
)
Costs and estimated earnings in excess of billings
(3,173
)
 
(1,825
)
 

Inventories
(1,250
)
 
2,287

 
1,951

Prepaid and other assets
(39
)
 
(402
)
 
316

Accounts payable
2,118

 
(360
)
 
48

Accrued expenses and other liabilities
364

 
1,259

 
(708
)
Income taxes payable
416

 
14

 
(3
)
Litigation settlement

 

 
(1,700
)
Deferred revenue, product
(505
)
 
280

 
343

Deferred revenue, license and development
(5,000
)
 
(5,000
)
 
73,958

Net cash provided by operating activities
2,895

 
4,965

 
69,055

Cash Flows From Investing Activities:
 
 
 
 
 
Restricted cash
1,538

 
(577
)
 
1,665

Maturities of marketable securities
49,106

 
7,535

 
12,925

Purchases of marketable securities
(80,641
)
 
(46,552
)
 

Capital expenditures
(7,376
)
 
(1,112
)
 
(572
)
Net cash (used in) provided by investing activities
(37,373
)
 
(40,706
)
 
14,018

Cash Flows From Financing Activities:
 
 
 
 
 
Net proceeds from issuance of common stock
5,508

 
6,600

 
1,326

Tax payment for employee shares withheld
(270
)
 

 

Proceeds from long-term debt

 

 
55

Repayment of long-term debt
(11
)
 
(10
)
 
(7
)
Repurchase of common stock
(4,276
)
 
(9,375
)
 

Net cash provided by (used in) financing activities
951

 
(2,785
)
 
1,374

Effect of exchange rate differences on cash and cash equivalents
(57
)
 
(41
)
 
(17
)
Net change in cash and cash equivalents
(33,584
)
 
(38,567
)
 
84,430

Cash and cash equivalents, beginning of year
61,364

 
99,931

 
15,501

Cash and cash equivalents, end of year
$
27,780

 
$
61,364

 
$
99,931







ENERGY RECOVERY, INC.
FINANCIAL INFORMATION BY SEGMENT
(In thousands)
(Unaudited)
 
Three Months Ended
December 31, 2017
 
Three Months Ended
December 31, 2016
 
Water
 
Oil &Gas
 
Total
 
Water
 
Oil &Gas
 
Total
Product revenue
$
20,594

 
$
545

 
$
21,139

 
$
14,953

 
$
1,714

 
$
16,667

Product cost of revenue
6,029

 
638

 
6,667

 
4,797

 
1,174

 
5,971

Product gross profit
14,565

 
(93
)
 
14,472

 
10,156

 
540

 
10,696

 
 
 
 
 
 
 
 
 
 
 
 
License and development revenue

 
1,250

 
1,250

 

 
1,250

 
1,250

 
 
 
 
 
 
 
 
 
 
 
 
Operating expenses:
 
 
 
 
 
 
 
 
 
 
 
General and administrative
436

 
480

 
916

 
253

 
350

 
603

Sales and marketing
1,748

 
593

 
2,341

 
1,413

 
852

 
2,265

Research and development
254

 
4,483

 
4,737

 
377

 
2,311

 
2,688

Amortization of intangibles
158

 

 
158

 
158

 

 
158

Operating expenses
2,596

 
5,556

 
8,152

 
2,201

 
3,513

 
5,714

 
 
 
 
 
 
 
 
 
 
 
 
Operating income (loss)
$
11,969

 
$
(4,399
)
 
7,570

 
$
7,955

 
$
(1,723
)
 
6,232


 
 
 
 
 
 
 
 
 
 
 
Less: Corporate operating expenses
 
 
 
 
4,513

 
 

 
 

 
3,552

Consolidated operating income
 
 
 
 
3,057

 
 

 
 

 
2,680

Non-operating income
 
 
 
 
220

 
 

 
 

 
152

Income before income taxes
 
 
 
 
$
3,277

 
 

 
 

 
$
2,832


 
Year Ended December 31, 2017
 
Water
 
Oil &Gas
 
Total
Product revenue
$
54,301

 
$
3,855

 
$
58,156

Product cost of revenue
16,032

 
3,029

 
19,061

Product gross profit
38,269

 
826

 
39,095

 
 
 
 
 
 
License and development revenue

 
5,000

 
5,000

 
 
 
 
 
 
Operating expenses:
 
 
 
 
 
General and administrative
1,401

 
1,565

 
2,966

Sales and marketing
5,787

 
2,228

 
8,015

Research and development
1,064

 
12,217

 
13,281

Amortization of intangibles
631

 

 
631

Operating expenses
8,883

 
16,010

 
24,893

 
 
 
 
 
 
Operating income (loss)
$
29,386


$
(10,184
)

19,202


 
 
 
 
 
Less: Corporate operating expenses
 

 
 

 
15,926

Consolidated operating income
 

 
 

 
3,276

Non-operating income
 

 
 

 
680

Income before income taxes
 

 
 

 
$
3,956






 
Year Ended December 31, 2016
 
Water
 
Oil &Gas
 
Total
Product revenue
$
47,545

 
$
2,170

 
$
49,715

Product cost of revenue
16,353

 
1,496

 
17,849

Product gross profit
31,192

 
674

 
31,866

 
 
 
 
 
 
License and development revenue

 
5,000

 
5,000

 
 
 
 
 
 
Operating expenses:
 
 
 
 
 
General and administrative
1,081

 
1,000

 
2,081

Sales and marketing
5,076

 
2,985

 
8,061

Research and development
1,331

 
8,705

 
10,036

Amortization of intangibles
631

 

 
631

Operating expenses
8,119

 
12,690

 
20,809

 
 
 
 
 
 
Operating income (loss)
$
23,073

 
$
(7,016
)
 
16,057


 
 
 
 
 
Less: Corporate operating expenses
 

 
 

 
15,700

Consolidated operating income
 

 
 

 
357

Non-operating income
 

 
 

 
287

Income before income taxes
 

 
 

 
$
644


 
Year Ended December 31, 2015
 
Water
 
Oil &Gas
 
Total
Product revenue
$
43,530

 
$
141

 
$
43,671

Product cost of revenue
19,045

 
66

 
19,111

Product gross profit
24,485

 
75

 
24,560

 
 
 
 
 
 
License and development revenue

 
1,042

 
1,042

 
 
 
 
 
 
Operating expenses:
 
 
 
 
 
General and administrative
936

 
1,797

 
2,733

Sales and marketing
4,918

 
4,070

 
8,988

Research and development
1,126

 
6,552

 
7,678

Amortization of intangibles
635

 

 
635

Operating expenses
7,615

 
12,419

 
20,034

 
 
 
 
 
 
Operating income (loss)
$
16,870

 
$
(11,302
)
 
5,568


 
 
 
 
 
Less: Corporate operating expenses
 

 
 

 
17,359

Consolidated operating loss
 

 
 

 
(11,791
)
Non-operating expense
 

 
 

 
(181
)
Loss before income taxes
 

 
 

 
$
(11,972
)






ENERGY RECOVERY, INC.
RECONCILIATION OF NON-GAAP FINANCIAL MEASURES
(In thousands, except per share data)
(Unaudited)


This press release includes non-GAAP financial information because we plan and manage our business using such information. Our non-GAAP Total Gross Margin is determined by adding back the license and development revenue associated with the amortization of the VorTeq exclusivity fee. Our non-GAAP Adjusted Net Income or Loss is determined by adding back non-recurring operating expenses.

 
Three Months Ended
December 31,
 
Years Ended
December 31,
 
2017
 
2016
 
2017
 
2016
Product revenue
$
21,139

 
$
16,667

 
$
58,156

 
$
49,715

License and development revenue
1,250

 
1,250

 
5,000

 
5,000

Total revenue
$
22,389

 
$
17,917

 
$
63,156

 
$
54,715

 
 
 
 
 
 
 
 
Product gross profit
$
14,472

 
$
10,696

 
$
39,095

 
$
31,866

License and development revenue
1,250

 
1,250

 
5,000

 
5,000

Total gross profit (non-GAAP)
$
15,722

 
$
11,946

 
$
44,095

 
$
36,866

 
 
 
 
 
 
 
 
Product gross margin
68.5
%
 
64.2
%
 
67.2
%
 
64.1
%
Total gross margin (non-GAAP)
70.2
%
 
66.7
%
 
69.8
%
 
67.4
%
 
 
 
 
 
 
 
 
Net income (loss)
$
11,625

 
$
3,123

 
$
12,350

 
$
1,034

Reversal of non-recurring expense (benefit) (non-GAAP)
(8,348
)
 

 
(8,394
)
 
1,008

Adjusted net income (loss) (non-GAAP)
$
3,277

 
$
3,123

 
$
3,956

 
$
2,042

 
 
 
 
 
 
 
 
Income (loss) per share:
 
 
 
 
 
 
 
Diluted
$
0.21

 
$
0.06

 
$
0.22

 
$
0.02

Diluted (non-GAAP)
$
0.06

 
$
0.06

 
$
0.07

 
$
0.04

 
 
 
 
 
 
 
 
Number of diluted shares used in per share calculations
55,715

 
55,947

 
55,612

 
55,451