Energy Recovery (ERII) 10-Q 4 Aug 16 2016 Q2 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	6 Months Ended
	Jun. 30, 2016	Aug. 01, 2016
Document Information [Line Items]
Entity Registrant Name	Energy Recovery, Inc.
Entity Central Index Key	1,421,517
Trading Symbol	erii
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	No
Entity Common Stock, Shares Outstanding (in shares)		52,054,700
Document Type	10-Q
Document Period End Date	Jun. 30, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q2
Amendment Flag	false

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 78,987	$ 99,931
Restricted cash	1,058	1,490
Short-term investments	15,095	257
Accounts receivable, net of allowance for doubtful accounts of $168 and $166 at June 30, 2016 and December 31, 2015, respectively	8,242	11,590
Unbilled receivables, current	1,804	1,879
Inventories	6,178	6,503
Deferred tax assets, net		938
Prepaid expenses and other current assets	1,272	943
Total current assets	112,636	123,531
Restricted cash, non-current	3,065	2,317
Unbilled receivables, non-current		6
Deferred tax assets, non-current	885
Property and equipment, net of accumulated depreciation of $19,872 and $18,338 at June 30, 2016 and December 31, 2015, respectively	9,762	10,622
Goodwill	12,790	12,790
Other intangible assets, net	2,216	2,531
Other assets, non-current	2	2
Total assets	141,356	151,799
Current liabilities:
Accounts payable	1,518	1,865
Accrued expenses and other current liabilities	5,233	7,808
Income taxes payable	89	2
Accrued warranty reserve	411	461
Deferred revenue	6,772	5,878
Current portion of long-term debt	10	10
Total current liabilities	14,033	16,024
Total long-term debt	33	38
Deferred tax liabilities, non-current	2,109	2,360
Deferred revenue, non-current	66,462	69,000
Other non-current liabilities	637	718
Total liabilities	83,274	88,140
Stockholders’ equity:
Preferred stock, $0.001 par value; 10,000,000 shares authorized; no shares issued or outstanding
Common stock, $0.001 par value; 200,000,000 shares authorized; 55,731,277 shares issued and 52,124,021 shares outstanding at June 30, 2016, and 54,948,235 shares issued and 52,468,779 shares outstanding at December 31, 2015	56	55
Additional paid-in capital	134,156	129,809
Accumulated other comprehensive loss	(101)	(64)
Treasury stock at cost, 3,607,256 and 2,479,456 shares repurchased at June 30, 2016 and December 31, 2015, respectively	(15,213)	(6,835)
Accumulated deficit	(60,816)	(59,306)
Total stockholders’ equity	58,082	63,659
Total liabilities and stockholders’ equity	$ 141,356	$ 151,799

Condensed Consolidated Balance3

Condensed Consolidated Balance Sheets (Unaudited) (Parentheticals) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Accounts receivable, allowance for doubtful accounts	$ 168	$ 166
Property and equipment, accumulated depreciation	$ 19,872	$ 18,338
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized (in shares)	10,000,000	10,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	200,000,000	200,000,000
Common stock, shares issued (in shares)	55,731,277	54,948,235
Common stock, shares outstanding (in shares)	52,124,021	52,468,779
Treasury stock, at cost, shares (in shares)	3,607,256	2,479,456

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Product revenue	$ 11,973,000	$ 10,484,000	$ 22,024,000	$ 16,348,000
Product cost of revenue	4,236,000	4,836,000	7,910,000	7,367,000
Product gross profit	7,737,000	5,648,000	14,114,000	8,981,000
License and development revenue	1,250,000	0	2,500,000	0
Operating expenses:
General and administrative	3,992,000	5,362,000	8,876,000	11,640,000
Sales and marketing	1,935,000	1,994,000	4,005,000	4,427,000
Research and development	2,422,000	1,410,000	5,087,000	3,943,000
Amortization of intangible assets	158,000	158,000	315,000	317,000
Total operating expenses	8,507,000	8,924,000	18,283,000	20,327,000
Income (loss) from operations	480,000	(3,276,000)	(1,669,000)	(11,346,000)
Other expense:
Interest expense			(1,000)	(40,000)
Other non-operating income (expense)	79,000	20,000	58,000	(82,000)
Income (loss) before income taxes	559,000	(3,256,000)	(1,612,000)	(11,468,000)
Provision (benefit) for income taxes	103,000	71,000	(102,000)	142,000
Net income (loss)	$ 456,000	$ (3,327,000)	$ (1,510,000)	$ (11,610,000)
Net income (loss) per share - basic (in dollars per share)	$ 0.01	$ (0.06)	$ (0.03)	$ (0.22)
Net income (loss) per share - diluted (in dollars per share)	$ 0.01	$ (0.06)	$ (0.03)	$ (0.22)
Basic weighted average common shares outstanding (in shares)	52,369	52,026	52,288	51,987
Diluted weighted average common shares outstanding (in shares)	55,698	52,026	52,288	51,987

Condensed Consolidated Stateme5

Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Net loss	$ 456	$ (3,327)	$ (1,510)	$ (11,610)
Other comprehensive (loss) income, net of tax:
Foreign currency translation. balance	6	(6)	(6)	25
Unrealized gains (losses) on investments. balance	(32)	(2)	(31)	1
Other comprehensive (loss) income	(26)	(8)	(37)	26
Comprehensive income (loss)	$ 430	$ (3,335)	$ (1,547)	$ (11,584)

Condensed Consolidated Stateme6

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Portion of Revenue of Product Sales Agreement for Installation, Startup, and Training [Member]
Changes in operating assets and liabilities:
Deferred revenue	$ 855	$ 714
Software License Arrangement [Member]
Changes in operating assets and liabilities:
Deferred revenue	(2,500)
Net loss	(1,510)	(11,610)
Stock-based compensation	1,865	3,053
Depreciation and amortization	1,851	1,959
Provision for warranty claims	96	15
Unrealized loss on foreign currency transactions	52	21
Amortization of premiums on investments	34	130
Change in fair value of put options	33
Provision for doubtful accounts	16	59
Valuation adjustments for excess or obsolete inventory	(42)	21
Other non-cash adjustments	(49)	86
Reversal of accruals related to expired warranties	(146)
Deferred income taxes	(199)	131
Accounts receivable	3,333	3,472
Inventories	389	(1,520)
Income taxes payable	89	4
Unbilled receivables	81	60
Litigation settlement		(1,700)
Accounts payable	(347)	549
Prepaid and other assets	(384)	239
Accrued expenses and other liabilities	(2,668)	(3,633)
Net cash provided by (used in) operating activities	849	(7,950)
Cash Flows From Investing Activities
Maturities of marketable securities		8,235
Restricted cash	(315)	2,422
Capital expenditures	(613)	(429)
Purchases of marketable securities	(14,903)
Net cash (used in) provided by investing activities	(15,831)	10,228
Cash Flows From Financing Activities
Net proceeds from issuance of common stock	2,511	293
Proceeds from long-term debt		55
Repayment of long-term debt	(5)	(2)
Repurchase of common stock	(8,378)
Net cash (used in) provided by financing activities	(5,872)	346
Effect of exchange rate differences on cash and cash equivalents	(90)	(18)
Net change in cash and cash equivalents	(20,944)	2,606
Cash and cash equivalents, beginning of period	99,931	15,501
Cash and cash equivalents, end of period	$ 78,987	$ 18,107

Note 1 - The Company and Summar

Note 1 - The Company and Summary of Significant Accounting Policies	6 Months Ended
	Jun. 30, 2016
Notes to Financial Statements
Significant Accounting Policies [Text Block]	Note 1 — The Company and Summary of Significant Accounting Policies The Company Energy Recovery, Inc. (the “Company”, “Energy Recovery”, “Our”, “Us”, and “We”) is an energy solutions provider to industrial fluid flow markets worldwide. We make industrial processes more operating and capital expenditure efficient. Our solutions convert wasted pressure energy into a reusable asset and preserve or eliminate pumping technology in hostile processing environments. Our solutions are marketed and sold in fluid flow markets, such as water, oil & gas, and chemical processing, under the trademarks ERI ® ® ® ® ™ ™ ™ ® ® Use of Estimates The preparation of condensed consolidated financial statements in conformity with U.S. generally accepted accounting principles (“U.S. GAAP”) requires our management to make judgments, assumptions, and estimates that affect the amounts reported in the condensed consolidated financial statements and accompanying notes. The accounting policies that reflect our more significant estimates and judgments and that we believe are the most critical to aid in fully understanding and evaluating our reported financial results are revenue recognition; allowance for doubtful accounts; allowance for product warranty; valuation of stock options; valuation and impairment of goodwill, long-lived assets, and acquired intangible assets; useful lives for depreciation and amortization; valuation adjustments for excess and obsolete inventory; and deferred taxes and valuation allowances on deferred tax assets. Actual results could differ materially from those estimates. Basis of Presentation The condensed consolidated financial statements include the accounts of Energy Recovery, Inc. and its wholly-owned subsidiaries. All significant intercompany accounts and transactions have been eliminated. The accompanying condensed consolidated financial statements have been prepared by us, without audit, pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). Certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to such rules and regulations. The December 31, 2015 condensed consolidated balance sheet was derived from audited financial statements, and may not include all disclosures required by U.S. GAAP; however, we believe that the disclosures are adequate to make the information presented not misleading. These unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and the notes thereto for the fiscal year ended December 31, 2015 included in our Annual Report on Form 10-K filed with the SEC on March 3, 2016. In the opinion of management, all adjustments, consisting of only normal recurring adjustments that are necessary to present fairly the financial position, results of operations, and cash flows for the interim periods, have been made. The results of operations for the interim periods are not necessarily indicative of the operating results for the full fiscal year or any future periods. Recent Accounting Pronouncements In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2014-09, Revenue from Contracts with Customers. In November 2015, the FASB issued ASU No. 2015-17, Income Taxes (Topic 740) - Balance Sheet Classification of Deferred Taxes In January 2016, the FASB issued ASU No. 2016-01 Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilitie s In February 2016, the FASB issued ASU No. 2016-02 Leases (Topic 842). In March and April 2016, the FASB issued ASU No. 2016-08 and ASU No. 2016-10, respectively, Revenue from Contracts with Customers (Topic 606). In March 2016, the FASB issued ASU No. 2016-09 Compensation – Stock Compensation (Topic 718).

Note 2 - Goodwill and Other Int

Note 2 - Goodwill and Other Intangible Assets	6 Months Ended
	Jun. 30, 2016
Notes to Financial Statements
Goodwill and Intangible Assets Disclosure [Text Block]	Note 2 — Goodwill and Other Intangible Assets Goodwill as of June 30, 2016 and December 31, 2015 of $12.8 million was the result of our acquisition of Pump Engineering, LLC in December 2009. During the three and six months ended June 30, 2016, there were no changes in the recognized amount of goodwill, and there has been no impairment of goodwill to date. The components of identifiable other intangible assets, all of which are finite-lived, as of the dates indicated were as follows (in thousands): June 30, 2016 Gross Carrying Amount Accumulated Amortization Accumulated Impairment Losses Net Carrying Amount Developed technology $ 6,100 $ (4,016 ) $ — $ 2,084 Non-compete agreements 1,310 (1,310 ) — — Backlog 1,300 (1,300 ) — — Trademarks 1,200 (180 ) (1,020 ) — Customer relationships 990 (990 ) — — Patents 585 (411 ) (42 ) 132 Total $ 11,485 $ (8,207 ) $ (1,062 ) $ 2,216 December 31, 2015 Gross Carrying Amount Accumulated Amortization Accumulated Impairment Losses Net Carrying Amount Developed technology $ 6,100 $ (3,711 ) $ — $ 2,389 Non-compete agreements 1,310 (1,310 ) — — Backlog 1,300 (1,300 ) — — Trademarks 1,200 (180 ) (1,020 ) — Customer relationships 990 (990 ) — — Patents 585 (401 ) (42 ) 142 Total $ 11,485 $ (7,892 ) $ (1,062 ) $ 2,531 Accumulated impairment losses at June 30, 2016 include impairment charges for trademarks in 2012 and impairment charges for patents in 2007 and 2010.

Note 3 - Income (Loss) Per Shar

Note 3 - Income (Loss) Per Share	6 Months Ended
	Jun. 30, 2016
Notes to Financial Statements
Earnings Per Share [Text Block]	Note 3 — Income (loss) per Share Basic and diluted net income (loss) per share is based on the weighted average number of common shares outstanding during the period. Potential dilutive securities are excluded from the calculation of (loss) per share, as their inclusion would be anti-dilutive. The following table shows the computation of basic and diluted income (loss) per share (in thousands, except per share data): Three Months Ended June 30, Six Months Ended June 30, 2016 2015 2016 2015 Numerator: Net income (loss) $ 456 $ (3,327 ) $ (1,510 ) $ (11,610 ) Denominator: Basic weighted average common shares outstanding 52,369 52,026 52,288 51,987 Weighted average effect of dilutive stock awards 3,329 — — — Diluted weighted average common shares outstanding 55,698 52,026 52,288 51,987 Net income (loss) per share - basic $ 0.01 $ (0.06 ) $ (0.03 ) $ (0.22 ) Net income (loss) per share - diluted $ 0.01 $ (0.06 ) $ (0.03 ) $ (0.22 ) The following potential common shares were excluded from the computation of diluted income (loss) per share because their effect would have been anti-dilutive (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2016 2015 2016 2015 Stock options 3,937 8,267 7,234 8,267 Warrants — 200 — 200 Restricted stock units 182 — 214 —

Note 4 - Other Financial Inform

Note 4 - Other Financial Information	6 Months Ended
	Jun. 30, 2016
Notes to Financial Statements
Additional Financial Information Disclosure [Text Block]	Note 4 — Other Financial Information Restricted Cash We have pledged cash in connection with stand-by letters of credit. We have deposited corresponding amounts into a money market account at a financial institution for these items as follows (in thousands): June 30, 2016 December 31, 2015 Current collateral for stand-by letters of credit $ 1,058 $ 1,490 Non-current collateral for stand-by letters of credit 3,065 2,317 Total restricted cash $ 4,123 $ 3,807 Inventories Our inventories are stated at the lower of cost (using the first-in, first-out “FIFO” method) or market and consisted of the following (in thousands): June 30, 2016 December 31, 2015 Raw materials $ 2,174 $ 2,590 Work in process 1,896 1,689 Finished goods 2,108 2,224 Inventories $ 6,178 $ 6,503 Prepaid and Other Current Assets Prepaid expenses and other current assets consisted of the following (in thousands): June 30, 2016 December 31, 2015 Foreign currency put option $ — $ 33 Interest receivable 108 4 Supplier advances 110 171 Prepaid rent 152 7 Other prepaid expenses and current assets 902 728 Total prepaid and other current assets $ 1,272 $ 943 Accrued Expenses and Other Current Liabilities Accrued expenses and other current liabilities consisted of the following (in thousands): June 30, 2016 December 31, 2015 Payroll and commissions payable $ 2,478 $ 5,086 Accrued legal expenses 497 217 Other accrued expenses and current liabilities 2,258 2,505 Accrued expenses and other current liabilities $ 5,233 $ 7,808 Accumulated Other Comprehensive Loss Changes in accumulated other comprehensive loss by component for the six months ended June 30, 2016, were as follows (in thousands): Foreign Currency Translation Adjustments Net of Tax Benefit Unrealized Losses on Investments Total Accumulated Other Comprehensive Loss Balance, December 31, 2015 $ (63 ) $ (1 ) $ (64 ) Net other comprehensive loss (6 ) (31 ) (37 ) Balance, June 30, 2016 $ (69 ) $ (32 ) $ (101 ) There were no reclassifications of amounts out of accumulated other comprehensive loss, as there have been no sales of securities or translation adjustments that impacted other comprehensive loss during the quarter. The tax impact of the changes in accumulated other comprehensive loss were not material.

Note 5 - Investments

Note 5 - Investments	6 Months Ended
	Jun. 30, 2016
Notes to Financial Statements
Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]	Note 5 — Investments Our short-term investments are all classified as available-for-sale. There were no sales of available-for-sale securities during the six months ended June 30, 2016. Available-for-sale securities as of the dates indicated consisted of the following (in thousands): June 30, 201 6 Amortized Cost Gross Unrealized Holding Gains Gross Unrealized Holding Losses Fair Value Corporate notes and bonds $ 15,127 $ — $ (32 ) $ 15,095 Total short-term investments $ 15,127 $ — $ (32 ) $ 15,095 December 31 , 201 5 Amortized Cost Gross Unrealized Holding Gains Gross Unrealized Holding Losses Fair Value Corporate notes and bonds $ 258 $ — $ (1 ) $ 257 Total short-term investments $ 258 $ — $ (1 ) $ 257 Gross unrealized losses and fair values of our investments in an unrealized loss position as of the dates indicated, aggregated by investment category and length of time that the security has been in a continuous loss position, were as follows (in thousands): June 30, 201 6 Less than 12 Months 12 Months or greater Total Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Corporate notes and bonds $ 14,843 $ (32 ) $ 252 $ — $ 15,095 $ (32 ) Total $ 14,843 $ (32 ) $ 252 $ — $ 15,095 $ (32 ) December 31, 201 5 Less than 12 Months 12 Months or greater Total Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Corporate notes and bonds $ — $ — $ 257 $ (1 ) $ 257 $ (1 ) Total $ — $ — $ 257 $ (1 ) $ 257 $ (1 ) Expected maturities can differ from contractual maturities because borrowers may have the right to prepay obligations without prepayment penalties. The amortized cost and fair value of available-for-sale securities that had stated maturities as of June 30, 2016 are shown below by contractual maturity (in thousands): June 30, 2016 Amortized Cost Fair Value Due in one year or less $ 15,127 $ 15,095 Total available-for-sale securities $ 15,127 $ 15,095

Note 6 - Long-term Debt and Lin

Note 6 - Long-term Debt and Lines of Credit	6 Months Ended
	Jun. 30, 2016
Notes to Financial Statements
Debt Disclosure [Text Block]	Note 6 — Long-Term Debt and Line of Credit Debt In March 2015, we entered into a loan agreement with a financial institution for a $55,000 fixed-rate installment loan carrying an annual interest rate of 6.35%. The loan is payable in equal monthly installments and matures on April 2, 2020. The note is secured by the asset purchased. Long-term debt consisted of the following (in thousands) June 30, 2016 December 31, 2015 Loan payable $ 43 $ 48 Less: current portion (10 ) (10 ) Total long-term debt $ 33 $ 38 Future minimum principal payments due under long-term debt arrangements consist of the following (in thousands): June 30, 2016 2016 (remaining six months) $ 5 2017 11 2018 11 2019 12 2020 4 Total debt $ 43 Line of Credit In June 2012, we entered into a loan agreement (the “2012 Agreement”) with a financial institution. The 2012 Agreement was amended in June 2015. The 2012 Agreement, as amended, provides for a total available credit line of $16.0 million. Under the 2012 Agreement, we are allowed to draw advances not to exceed, at any time, $10.0 million as revolving loans. The total stand-by letters of credit issued under the 2012 Agreement may not exceed the lesser of the $16.0 million credit line or the credit line minus all outstanding revolving loans. At no time may the aggregate of the revolving loans and stand-by letters of credit exceed the total available credit line of $16.0 million. Revolving loans may be in the form of a base rate loan that bears interest equal to the prime rate or a Eurodollar loan that bears interest equal to the adjusted LIBOR rate plus 1.25%. Stand-by letters of credit are subject to customary fees and expenses for issuance or renewal. The unused portion of the credit facility is subject to a facility fee in an amount equal to 0.25% per annum of the average unused portion of the revolving line. The 2012 Agreement, as amended, also requires us to maintain a cash collateral balance equal to 101% of all outstanding advances and all outstanding stand-by letters of credit collateralized by the line of credit. The 2012 Agreement, as amended, matures in June 2018 and is collateralized by substantially all of our assets. As of June 30, 2016 and December 31, 2015, there were no advances drawn under the 2012 Agreement. Stand-by letters of credit collateralized under the 2012 Agreement, as amended, totaled $4.1 million and $3.8 million as of June 30, 2016 and December 31, 2015, respectively. Total cash restricted related to these stand-by letters of credit totaled $4.1 million and $3.8 million as of June 30, 2016 and December 31, 2015, respectively. We are subject to certain financial and administrative covenants under the 2012 Agreement, as amended. As of June 30, 2016, we were in compliance with these covenants.

Note 7 - Equity

Note 7 - Equity	6 Months Ended
	Jun. 30, 2016
Notes to Financial Statements
Disclosure of Compensation Related Costs, Share-based Payments [Text Block]	Note 7 — Equity Stock Repurchase Program In January 2016, the Board of Directors authorized a stock repurchase program under which shares, not to exceed $6.0 million in aggregate cost, of our outstanding common stock can be repurchased through June 30, 2016 at the discretion of management. We account for stock repurchases using the cost method. Cost includes fees charged in connection with acquiring the treasury stock. As of June 30, 2016, 673,700 shares, at an aggregate cost of $4.1 million, had been repurchased under this authorization. This authorization was replaced with a new authorization in May 2016. In May 2016, the Board of Directors authorized a stock repurchase plan under which shares, not to exceed $10.0 million in aggregate cost, of our outstanding common stock could be repurchased through October 31, 2016 at the discretion of management. As of June 30, 2016, 454,100 shares, at an aggregate cost of $4.3 million, had been repurchased under this authorization. Stock-based Compensation Expense For the three and six months ended June 30, 2016 and 2015, we recognized stock-based compensation expense related to employees and consultants as follows (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2016 201 5 2016 201 5 Cost of revenue $ 24 $ 37 $ 62 $ 72 General and administrative 373 1,679 1,257 2,576 Sales and marketing 125 106 284 207 Research and development 155 91 262 198 Total stock-based compensation expense $ 677 $ 1,913 $ 1,865 $ 3,053 Stock-based compensation in the three and six months ended June 30, 2015 included modification expenses in connection with the resignation of the former Chief Executive Officer related to the accelerated vesting, extended vesting, and extended exercise period of options previously granted of approximately $1.3 million. In connection with the resignation of the former General Counsel, Chief Compliance Officer, and Secretary, additional stock based compensation of approximately $0.5 million was recorded in the first quarter of 2016 related to the continued vesting of awards granted prior to the resignation. Stock Option Plan On June 23, 2016, our stockholders approved the 2016 Incentive Plan (the “Plan”). Prior to June 23, 2016, we maintained an equity incentive plan, the Amended and Restated 2008 Equity Incentive Plan (the “Prior Plan”). Stock-based awards granted under the Plan generally vest over four years and expire no more than ten years after the date of grant. Subject to adjustments as provided in the Plan, the number of shares of common stock initially authorized for issuance under the Plan is 4,441,083, plus up to 7,635,410 shares subject to outstanding awards under the Prior Plan that subsequently cease to be subject to such awards (other than by reason of exercise or settlement of the awards in shares). On July 27, 2016, we filed a registration statement on Form S-8 with respect to 4,441,083 shares issuable under the Plan. The Plan supersedes all previously issued stock incentive plans and will be the only available plan from which stock related awards may be granted. Stock Option Activity The following table summarizes the stock option activity under the Plan and includes options granted under all previous plans: Options Outstanding Options Weighted Average Exercise Price Weighted Average Remaining Contractual Life (in Years) Aggregate Intrinsic Value (2) Balance December 31, 2015 7,198,479 $ 3.97 7.0 $ 22,875,000 Granted 872,017 $ 8.49 — — Exercised (783,042 ) $ 3.21 — — Forfeited (53,316 ) $ 5.44 — — Balance June 30, 2016 7,234,138 $ 4.58 7.2 $ 31,185,000 Vested and exercisable as of June 30, 2016 4,439,757 $ 4.20 6.1 $ 20,838,000 Vested and exercisable as of June 30, 2016 and expected to vest thereafter (1) 6,780,263 $ 4.53 7.0 $ 29,888,000 (1) “ Compensation — Stock Compensation. ” (2) As of June 30, 2016, total unrecognized compensation cost related to non-vested options, net of estimated forfeitures, was $6.8 million, which is expected to be recognized as an expense over a weighted average period of approximately 2.74 years. Restricted Stock Unit Activity The following table summarizes the restricted stock unit activity under the Plan and includes restricted stock units granted under all previous plans: Units Weighted Average Grant-Date Fair Value (Per unit) Outstanding at December 31, 2015 — $ — Awarded 213,514 $ 8.65 Vested — $ — Forfeited — $ — Outstanding at June 30, 2016 213,514 $ 8.65 As of June 30, 2016, total unrecognized compensation cost related to non-vested restricted stock units, net of estimated forfeitures, was $1.3 million, which is expected to be recognized as an expense over a weighted average period of approximately 3.7 years.

Note 8 - Income Taxes

Note 8 - Income Taxes	6 Months Ended
	Jun. 30, 2016
Notes to Financial Statements
Income Tax Disclosure [Text Block]	Note 8 — Income Taxes The effective tax rate for the six months ended June 30, 2016 and 2015 was 6.3% and (1.23%), respectively. As of December 31, 2015, a valuation allowance of approximately $21.4 million had been established to reduce our deferred income tax assets to the amount expected to be realized. The tax expense recognized for the six months ended June 30, 2016, was primarily related to the tax basis amortization of goodwill and federal, state, and other taxes. The tax expenses were offset by a tax benefit related to losses in our Ireland subsidiary.

Note 9 - Commitments and Contin

Note 9 - Commitments and Contingencies	6 Months Ended
	Jun. 30, 2016
Notes to Financial Statements
Commitments and Contingencies Disclosure [Text Block]	Note 9 — Commitments and Contingencies Operating Lease Obligations We lease facilities under fixed non-cancellable operating leases that expire on various dates through November 2019. Future minimum lease payments consist of the following (in thousands): June 30, 2016 2016 (remaining six months) 838 2017 1,642 2018 1,603 2019 1,402 Total future minimum lease payments $ 5,485 Product Warranty The following table summarizes the activity related to the product warranty liability during the three and six months ended June 30, 2016 and 2015 (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2016 2015 2016 2015 Balance, beginning of period $ 428 $ 756 $ 461 $ 755 Warranty costs charged to cost of revenue 54 (6 ) 96 15 Release of accrual for expired warranties (71 ) — (146 ) — Utilization of warranty — (3 ) — (23 ) Balance, end of period $ 411 $ 747 $ 411 $ 747 Purchase Obligations We enter into purchase order arrangements with our vendors. As of June 30, 2016, there were open purchase orders for which we had not yet received the related goods or services. These arrangements are subject to change based on our sales demand forecasts, and we have the right to cancel the arrangements prior to the date of delivery. As of June 30, 2016, we had approximately $1.4 million of cancellable open purchase order arrangements related primarily to materials and parts. Guarantees We enter into indemnification provisions under our agreements with other companies in the ordinary course of business, typically with customers. Under these provisions, we generally indemnify and hold harmless the indemnified party for losses suffered or incurred by the indemnified party as a result of our activities, generally limited to personal injury and property damage caused by our employees at a customer’s desalination plant in proportion to the employee’s percentage of fault for the accident. Damages incurred for these indemnifications would be covered by our general liability insurance to the extent provided by the policy limitations. We have not incurred material costs to defend lawsuits or settle claims related to these indemnification agreements. As a result, the estimated fair value of these agreements is not material. Accordingly, we have no liabilities recorded for these agreements as of June 30, 2016 and December 31, 2015. In certain cases, we issue warranty and product performance guarantees to our customers for amounts ranging from 5% to 15% of the total sales agreement to endorse the execution of product delivery and the warranty of design work, fabrication, and operating performance. These guarantees, generally in the form of stand-by letters of credit or bank guarantees secured by stand-by letters of credit, typically remain in place for periods ranging up to 24 months and in some cases up to 68 months, and relate to the underlying product warranty period. The stand-by letters of credit are collateralized by restricted cash and our credit facility. The $4.1 million in stand-by letters of credit outstanding at June 30, 2016 were collateralized by restricted cash of $4.1 million. Litigation The Company is named in and subject to various proceedings and claims in connection with our business. We are contesting the allegations in these claims, and we believe that there are meritorious defenses in each of these matters. The outcome of matters we have been and currently are involved in cannot be determined at this time, and the results cannot be predicted with certainty. There can be no assurance that these matters will not have a material adverse effect on our results of operations in any future period and a significant judgment could have a material adverse impact on our financial condition, results of operations and cash flows. We may in the future become involved in additional litigation in the ordinary course of our business, including litigation that could be material to our business. Based on currently available information and review with outside counsel, management does not believe that the currently known actions or threats against the Company will result in any material adverse effect on our financial condition, results of operations, or cash flows. On September 10, 2014, the Company terminated the employment of its Senior Vice President, Sales, Borja Blanco, on the basis of breach of duty of trust and conduct leading to conflict of interest. On October 24, 2014, Mr. Blanco filed a labor claim against ERI Iberia in Madrid, Spain, challenging the fairness of his dismissal and seeking compensation (“Case 1”). A hearing was held on November 13, 2015, after which the labor court ruled that it did not have jurisdiction over the matter. Mr. Blanco has appealed. Based on currently available information and review with outside counsel, at this time, the Company has not determined that an award to Mr. Blanco is probable. On November 24, 2014, Mr. Blanco filed a second action based on breach of contract theories in the same court as Case 1, but the cases are separate. In Case 2, Mr. Blanco seeks payment of an unpaid bonus, stock options, and non-compete compensation. The court ruled that this case is stayed until a final ruling is issued in Case 1. Based on currently available information and review with outside counsel, at this time, the Company has not determined that an award to Mr. Blanco is probable. On January 20 and 27, 2015, two stockholder class action complaints were filed against the Company in the United States District Court of the Northern District of California, on behalf of Energy Recovery stockholders under the captions, Joseph Sabatino v. Energy Recovery, Inc. et al . , Thomas C. Mowdy v. Energy Recovery, Inc , et al In Re Energy Recovery Inc. Securities Litigation . On January 27, 2016, a complaint was filed by the Company’s Former Chief Sales Officer, David Barnes, in the United States District Court for the Northern District of California under the caption, David Barnes v. Energy Recovery, Inc. , On February 18, 2016, a complaint captioned Goldberg v . Rooney, et al

Note 10 - Business Segment and

Note 10 - Business Segment and Geographic Information	6 Months Ended
	Jun. 30, 2016
Notes to Financial Statements
Segment Reporting Disclosure [Text Block]	Note 10 — Business Segment and Geographic Information We are an energy solutions provider to industrial fluid flow markets worldwide. We make industrial processes more operating and capital expenditure efficient. Our chief operating decision-maker (“CODM”) is the chief executive officer (“CEO”). Following the appointment of a new CEO in April 2015, new internal reporting was developed for making operating decisions and assessing financial performance. Beginning July 1, 2015, a new internal organizational and reporting structure was implemented and we began reporting segment information on a basis reflecting this new structure. Prior period amounts have been adjusted retrospectively to reflect this new internal reporting structure. Our reportable operating segments consist of the Water Segment and the Oil & Gas Segment. These segments are based on the industries in which the products are sold, the type of energy recovery device sold, and the related products and services. The Water Segment consists of revenue associated with products sold for use in reverse osmosis water desalination, as well as the related identifiable expenses. The Oil & Gas Segment consists of product revenue associated with products sold for use in gas processing, chemical processing, and hydraulic fracturing and license and development revenue associated with hydraulic fracturing, as well as related identifiable expenses. Operating income for each segment excludes other income and expenses and certain expenses managed outside the operating segment. Costs excluded from operating income include various corporate expenses such as certain stock-based compensation expenses, income taxes, and other separately managed general and administrative expenses not related to the identified segments. Assets and liabilities are reviewed at the consolidated level by the CODM and are not accounted for by segment. The CODM allocates resources to and assesses the performance of each operating segment using information about its revenue and operating income (loss). The following summarizes financial information by segment for the periods presented (in thousands): Three Months Ended June 30, 2016 Three Months Ended June 30, 2015 Water Oil &Gas Total Water Oil &Gas Total Product revenue $ 11,973 $ — $ 11,973 $ 10,484 $ — $ 10,484 Product cost of revenue 4,236 — 4,236 4,836 — 4,836 Product gross profit 7,737 — 7,737 5,648 — 5,648 License and development revenue — 1,250 1,250 — — — Operating expenses: General and administrative 263 184 447 (17 ) 391 374 Sales and marketing 1,100 576 1,676 931 949 1,880 Research and development 333 2,074 2,407 201 1,299 1,500 Amortization of intangibles 158 — 158 158 — 158 Operating expenses 1,854 2,834 4,688 1,273 2,639 3,912 Operating income (loss) $ 5,883 $ (1,584 ) 4,299 $ 4,375 $ (2,639 ) 1,736 Less: Corporate operating expenses 3,819 5,012 Consolidated operating income (loss) 480 (3,276 ) Non-operating income 79 20 Income (loss) before income taxes $ 559 $ (3,256 ) Six Months Ended June 30, 2016 Six Months Ended June 30, 2015 Water Oil &Gas Total Water Oil &Gas Total Product revenue $ 22,024 $ — $ 22,024 $ 16,207 $ 141 $ 16,348 Product cost of revenue 7,910 — 7,910 7,339 28 7,367 Product gross profit 14,114 — 14,114 8,868 113 8,981 License and development revenue — 2,500 2,500 — — — Operating expenses: General and administrative 482 372 854 587 723 1,310 Sales and marketing 2,229 1,383 3,612 2,101 2,069 4,170 Research and development 692 4,371 5,063 546 3,459 4,005 Amortization of intangibles 315 — 315 317 — 317 Operating expenses 3,718 6,126 9,844 3,551 6,251 9,802 Operating income (loss) $ 10,396 $ (3,626 ) 6,770 $ 5,317 $ (6,138 ) (821 ) Less: Corporate operating expenses 8,439 10,525 Consolidated operating loss (1,669 ) (11,346 ) Non-operating income (expenses) 57 (122 ) Loss before income taxes $ (1,612 ) $ (11,468 ) The following geographic information includes net revenue to our domestic and international customers based on the customers’ requested delivery locations, except for certain cases in which the customer directed us to deliver our products to a location that differs from the known ultimate location of use. In such cases, the ultimate location of use, rather than the delivery location, is reflected in the table below (in thousands, except percentages): Three Months Ended June 30, Six Months Ended June 30, 2016 2015 2016 2015 Domestic product revenue $ 219 $ 922 $ 404 $ 1,186 International product revenue 11,754 9,562 21,620 15,162 Total product revenue $ 11,973 $ 10,484 $ 22,024 $ 16,348 Product revenue by country: China 25 % 4 % 15 % 4 % Egypt 19 % 3 % 11 % 9 % United States 2 % 9 % 2 % 7 % UAE 1 % 35 % 2 % 23 % Qatar * % 0 % 18 % 0 % Others ** 53 % 49 % 52 % 57 % Total 100 % 100 % 100 % 100 % * Less than 1%. ** Includes remaining countries not separately disclosed. No country in this line item accounted for more than 10% of our product revenue during the periods presented. All of our long-lived assets were located in the United States at June 30, 2016 and December 31, 2015.

Note 11 - Concentrations

Note 11 - Concentrations	6 Months Ended
	Jun. 30, 2016
Notes to Financial Statements
Concentration Risk Disclosure [Text Block]	Note 11 — Concentrations Customers accounting for 10% or more of our accounts receivable and unbilled receivables were as follows: June 30, 2016 December 31, 2015 Customer A 24 % 8 % Customer B 13 % 2 % Customer C 6 % 18 % Customer D 4 % 26 % Revenue from customers representing 10% or more of product revenue varies from period to period. For the periods indicated, customers representing 10% or more of product revenue were: Three Months Ended June 30, Six Months Ended June 30, 2016 2015 2016 2015 Customer A 20 % * % 12 % * % Customer B 11 % 6 % 6 % 4 % Customer E 4 % 9 % 4 % 10 % Customer C 1 % 1 % 19 % 1 % Customer F * % 30 % 1 % 22 % * Less than 1%. A single customer, Customer G, represents 100% of our license and development revenue for the three and six months ended June 30, 2016. There was no license and development revenue recognized for the three or six months ended June 30, 2015. Vendors accounting for 10% or more of our accounts payable were as follows: June 30, 2016 December 31, 2015 Vendor A 26 % 0 % Vendor B 19 % 0 %

Note 12 - Fair Value Measuremen

Note 12 - Fair Value Measurements	6 Months Ended
	Jun. 30, 2016
Notes to Financial Statements
Fair Value Disclosures [Text Block]	Note 12 — Fair Value Measurements The authoritative guidance for measuring fair value provides a hierarchy that prioritizes the inputs to valuation techniques used in measuring fair value as follows: Level 1 — Quoted prices (unadjusted) in active markets for identical assets or liabilities; Level 2 — Inputs other than quoted prices included within Level 1 that are either directly or indirectly observable; and Level 3 — Unobservable inputs in which little or no market activity exists, therefore requiring an entity to develop its own assumptions that market participants would use in pricing. The carrying values of cash and cash equivalents, restricted cash, accounts receivable, unbilled receivables, accounts payable, and other accrued expenses approximate fair value due to the short-term maturity of those instruments. For our investments in available-for-sale securities, if quoted prices in active markets for identical investments are not available to determine fair value (Level 1), then we use quoted prices for similar assets or inputs other than quoted prices that are observable either directly or indirectly (Level 2). The investments included in Level 2 consist of corporate agency obligations and the premium paid for foreign currency put options. The fair value of financial assets and liabilities measured on a recurring basis for the indicated periods was as follows (in thousands): June 30, 2016 Level 1 Level 2 Inputs Level 3 Inputs Assets: Available-for-sale securities $ 15,095 $ — $ 15,095 $ — Total assets $ 15,095 $ — $ 15,095 $ — December 31, 2015 Level 1 Level 2 Inputs Level 3 Inputs Assets: Available-for-sale securities $ 257 $ — $ 257 $ — Foreign currency put options 33 — 33 — Total assets $ 290 $ — $ 290 $ —

Note 13 - Related Party Transac

Note 13 - Related Party Transactions	6 Months Ended
	Jun. 30, 2016
Notes to Financial Statements
Related Party Transactions Disclosure [Text Block]	Note 13 — Related Party Transactions In January 2016, the Company entered into a lease agreement with EMS USA, Inc. for the use of office space. The President and Chief Executive Officer of EMS USA, Inc. is also a member of the Board of Directors of the Company. The lease is for a term of ninety (90) days with continuation on a month-to-month basis thereafter, with each month being an “Additional Term.” The Company paid EMS USA, Inc. $2,502 and $4,170, respectively, related to this agreement during the three and six months ended June 30, 2016. In March 2016, the Company extended an employee loan to one of its employees for $21,786. The loan is repayable to the Company monthly over six months and is non-interest bearing. At June 30, 2016, $10,893 was outstanding under this loan.

Note 14 - Subsequent Events

Note 14 - Subsequent Events	6 Months Ended
	Jun. 30, 2016
Notes to Financial Statements
Subsequent Events [Text Block]	Note 14 - S ubsequent Events On July 18, 2016, we finalized a purchase order associated with a previously announced letter of award totaling up to $11 million to provide our IsoBoost technology for integration into a major gas processing plant to be constructed in the Middle East. The contract is for approximately $7 million worth of equipment and services, with an option for an additional $4 million to be determined at a later date.

Significant Accounting Policies

Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2016
Accounting Policies [Abstract]
Use of Estimates, Policy [Policy Text Block]	Use of Estimates The preparation of condensed consolidated financial statements in conformity with U.S. generally accepted accounting principles (“U.S. GAAP”) requires our management to make judgments, assumptions, and estimates that affect the amounts reported in the condensed consolidated financial statements and accompanying notes. The accounting policies that reflect our more significant estimates and judgments and that we believe are the most critical to aid in fully understanding and evaluating our reported financial results are revenue recognition; allowance for doubtful accounts; allowance for product warranty; valuation of stock options; valuation and impairment of goodwill, long-lived assets, and acquired intangible assets; useful lives for depreciation and amortization; valuation adjustments for excess and obsolete inventory; and deferred taxes and valuation allowances on deferred tax assets. Actual results could differ materially from those estimates.
Basis of Accounting, Policy [Policy Text Block]	Basis of Presentation The condensed consolidated financial statements include the accounts of Energy Recovery, Inc. and its wholly-owned subsidiaries. All significant intercompany accounts and transactions have been eliminated. The accompanying condensed consolidated financial statements have been prepared by us, without audit, pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). Certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to such rules and regulations. The December 31, 2015 condensed consolidated balance sheet was derived from audited financial statements, and may not include all disclosures required by U.S. GAAP; however, we believe that the disclosures are adequate to make the information presented not misleading. These unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and the notes thereto for the fiscal year ended December 31, 2015 included in our Annual Report on Form 10-K filed with the SEC on March 3, 2016. In the opinion of management, all adjustments, consisting of only normal recurring adjustments that are necessary to present fairly the financial position, results of operations, and cash flows for the interim periods, have been made. The results of operations for the interim periods are not necessarily indicative of the operating results for the full fiscal year or any future periods.
New Accounting Pronouncements, Policy [Policy Text Block]	Recent Accounting Pronouncements In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2014-09, Revenue from Contracts with Customers. In November 2015, the FASB issued ASU No. 2015-17, Income Taxes (Topic 740) - Balance Sheet Classification of Deferred Taxes In January 2016, the FASB issued ASU No. 2016-01 Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilitie s In February 2016, the FASB issued ASU No. 2016-02 Leases (Topic 842). In March and April 2016, the FASB issued ASU No. 2016-08 and ASU No. 2016-10, respectively, Revenue from Contracts with Customers (Topic 606). In March 2016, the FASB issued ASU No. 2016-09 Compensation – Stock Compensation (Topic 718).

Note 2 - Goodwill and Other I22

Note 2 - Goodwill and Other Intangible Assets (Tables)	6 Months Ended
	Jun. 30, 2016
Notes Tables
Schedule of Finite-Lived Intangible Assets [Table Text Block]	June 30, 2016 Gross Carrying Amount Accumulated Amortization Accumulated Impairment Losses Net Carrying Amount Developed technology $ 6,100 $ (4,016 ) $ — $ 2,084 Non-compete agreements 1,310 (1,310 ) — — Backlog 1,300 (1,300 ) — — Trademarks 1,200 (180 ) (1,020 ) — Customer relationships 990 (990 ) — — Patents 585 (411 ) (42 ) 132 Total $ 11,485 $ (8,207 ) $ (1,062 ) $ 2,216 December 31, 2015 Gross Carrying Amount Accumulated Amortization Accumulated Impairment Losses Net Carrying Amount Developed technology $ 6,100 $ (3,711 ) $ — $ 2,389 Non-compete agreements 1,310 (1,310 ) — — Backlog 1,300 (1,300 ) — — Trademarks 1,200 (180 ) (1,020 ) — Customer relationships 990 (990 ) — — Patents 585 (401 ) (42 ) 142 Total $ 11,485 $ (7,892 ) $ (1,062 ) $ 2,531

Note 3 - Income (Loss) Per Sh23

Note 3 - Income (Loss) Per Share (Tables)	6 Months Ended
	Jun. 30, 2016
Notes Tables
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	Three Months Ended June 30, Six Months Ended June 30, 2016 2015 2016 2015 Numerator: Net income (loss) $ 456 $ (3,327 ) $ (1,510 ) $ (11,610 ) Denominator: Basic weighted average common shares outstanding 52,369 52,026 52,288 51,987 Weighted average effect of dilutive stock awards 3,329 — — — Diluted weighted average common shares outstanding 55,698 52,026 52,288 51,987 Net income (loss) per share - basic $ 0.01 $ (0.06 ) $ (0.03 ) $ (0.22 ) Net income (loss) per share - diluted $ 0.01 $ (0.06 ) $ (0.03 ) $ (0.22 )
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]	Three Months Ended June 30, Six Months Ended June 30, 2016 2015 2016 2015 Stock options 3,937 8,267 7,234 8,267 Warrants — 200 — 200 Restricted stock units 182 — 214 —

Note 4 - Other Financial Info24

Note 4 - Other Financial Information (Tables)	6 Months Ended
	Jun. 30, 2016
Notes Tables
Schedule of Restricted Cash and Cash Equivalents [Table Text Block]	June 30, 2016 December 31, 2015 Current collateral for stand-by letters of credit $ 1,058 $ 1,490 Non-current collateral for stand-by letters of credit 3,065 2,317 Total restricted cash $ 4,123 $ 3,807
Schedule of Inventory, Current [Table Text Block]	June 30, 2016 December 31, 2015 Raw materials $ 2,174 $ 2,590 Work in process 1,896 1,689 Finished goods 2,108 2,224 Inventories $ 6,178 $ 6,503
Schedule of Other Current Assets [Table Text Block]	June 30, 2016 December 31, 2015 Foreign currency put option $ — $ 33 Interest receivable 108 4 Supplier advances 110 171 Prepaid rent 152 7 Other prepaid expenses and current assets 902 728 Total prepaid and other current assets $ 1,272 $ 943
Schedule of Accrued Liabilities [Table Text Block]	June 30, 2016 December 31, 2015 Payroll and commissions payable $ 2,478 $ 5,086 Accrued legal expenses 497 217 Other accrued expenses and current liabilities 2,258 2,505 Accrued expenses and other current liabilities $ 5,233 $ 7,808
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]	Foreign Currency Translation Adjustments Net of Tax Benefit Unrealized Losses on Investments Total Accumulated Other Comprehensive Loss Balance, December 31, 2015 $ (63 ) $ (1 ) $ (64 ) Net other comprehensive loss (6 ) (31 ) (37 ) Balance, June 30, 2016 $ (69 ) $ (32 ) $ (101 )

Note 5 - Investments (Tables)

Note 5 - Investments (Tables)	6 Months Ended
	Jun. 30, 2016
Notes Tables
Available-for-sale Securities [Table Text Block]	June 30, 201 6 Amortized Cost Gross Unrealized Holding Gains Gross Unrealized Holding Losses Fair Value Corporate notes and bonds $ 15,127 $ — $ (32 ) $ 15,095 Total short-term investments $ 15,127 $ — $ (32 ) $ 15,095 December 31 , 201 5 Amortized Cost Gross Unrealized Holding Gains Gross Unrealized Holding Losses Fair Value Corporate notes and bonds $ 258 $ — $ (1 ) $ 257 Total short-term investments $ 258 $ — $ (1 ) $ 257
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Table Text Block]	June 30, 201 6 Less than 12 Months 12 Months or greater Total Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Corporate notes and bonds $ 14,843 $ (32 ) $ 252 $ — $ 15,095 $ (32 ) Total $ 14,843 $ (32 ) $ 252 $ — $ 15,095 $ (32 ) December 31, 201 5 Less than 12 Months 12 Months or greater Total Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Corporate notes and bonds $ — $ — $ 257 $ (1 ) $ 257 $ (1 ) Total $ — $ — $ 257 $ (1 ) $ 257 $ (1 )
Investments Classified by Contractual Maturity Date [Table Text Block]	June 30, 2016 Amortized Cost Fair Value Due in one year or less $ 15,127 $ 15,095 Total available-for-sale securities $ 15,127 $ 15,095

Note 6 - Long-term Debt and L26

Note 6 - Long-term Debt and Lines of Credit (Tables)	6 Months Ended
	Jun. 30, 2016
Notes Tables
Schedule of Long-term Debt Instruments [Table Text Block]	June 30, 2016 December 31, 2015 Loan payable $ 43 $ 48 Less: current portion (10 ) (10 ) Total long-term debt $ 33 $ 38
Schedule of Maturities of Long-term Debt [Table Text Block]	June 30, 2016 2016 (remaining six months) $ 5 2017 11 2018 11 2019 12 2020 4 Total debt $ 43

Note 7 - Equity (Tables)

Note 7 - Equity (Tables)	6 Months Ended
	Jun. 30, 2016
Notes Tables
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block]	Three Months Ended June 30, Six Months Ended June 30, 2016 201 5 2016 201 5 Cost of revenue $ 24 $ 37 $ 62 $ 72 General and administrative 373 1,679 1,257 2,576 Sales and marketing 125 106 284 207 Research and development 155 91 262 198 Total stock-based compensation expense $ 677 $ 1,913 $ 1,865 $ 3,053
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]	Options Outstanding Options Weighted Average Exercise Price Weighted Average Remaining Contractual Life (in Years) Aggregate Intrinsic Value (2) Balance December 31, 2015 7,198,479 $ 3.97 7.0 $ 22,875,000 Granted 872,017 $ 8.49 — — Exercised (783,042 ) $ 3.21 — — Forfeited (53,316 ) $ 5.44 — — Balance June 30, 2016 7,234,138 $ 4.58 7.2 $ 31,185,000 Vested and exercisable as of June 30, 2016 4,439,757 $ 4.20 6.1 $ 20,838,000 Vested and exercisable as of June 30, 2016 and expected to vest thereafter (1) 6,780,263 $ 4.53 7.0 $ 29,888,000
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]	Units Weighted Average Grant-Date Fair Value (Per unit) Outstanding at December 31, 2015 — $ — Awarded 213,514 $ 8.65 Vested — $ — Forfeited — $ — Outstanding at June 30, 2016 213,514 $ 8.65

Note 9 - Commitments and Cont28

Note 9 - Commitments and Contingencies (Tables)	6 Months Ended
	Jun. 30, 2016
Notes Tables
Operating Leases of Lessee Disclosure [Table Text Block]	June 30, 2016 2016 (remaining six months) 838 2017 1,642 2018 1,603 2019 1,402 Total future minimum lease payments $ 5,485
Schedule of Product Warranty Liability [Table Text Block]	Three Months Ended June 30, Six Months Ended June 30, 2016 2015 2016 2015 Balance, beginning of period $ 428 $ 756 $ 461 $ 755 Warranty costs charged to cost of revenue 54 (6 ) 96 15 Release of accrual for expired warranties (71 ) — (146 ) — Utilization of warranty — (3 ) — (23 ) Balance, end of period $ 411 $ 747 $ 411 $ 747

Note 10 - Business Segment an29

Note 10 - Business Segment and Geographic Information (Tables)	6 Months Ended
	Jun. 30, 2016
Notes Tables
Schedule of Segment Reporting Information, by Segment [Table Text Block]	Three Months Ended June 30, 2016 Three Months Ended June 30, 2015 Water Oil &Gas Total Water Oil &Gas Total Product revenue $ 11,973 $ — $ 11,973 $ 10,484 $ — $ 10,484 Product cost of revenue 4,236 — 4,236 4,836 — 4,836 Product gross profit 7,737 — 7,737 5,648 — 5,648 License and development revenue — 1,250 1,250 — — — Operating expenses: General and administrative 263 184 447 (17 ) 391 374 Sales and marketing 1,100 576 1,676 931 949 1,880 Research and development 333 2,074 2,407 201 1,299 1,500 Amortization of intangibles 158 — 158 158 — 158 Operating expenses 1,854 2,834 4,688 1,273 2,639 3,912 Operating income (loss) $ 5,883 $ (1,584 ) 4,299 $ 4,375 $ (2,639 ) 1,736 Less: Corporate operating expenses 3,819 5,012 Consolidated operating income (loss) 480 (3,276 ) Non-operating income 79 20 Income (loss) before income taxes $ 559 $ (3,256 ) Six Months Ended June 30, 2016 Six Months Ended June 30, 2015 Water Oil &Gas Total Water Oil &Gas Total Product revenue $ 22,024 $ — $ 22,024 $ 16,207 $ 141 $ 16,348 Product cost of revenue 7,910 — 7,910 7,339 28 7,367 Product gross profit 14,114 — 14,114 8,868 113 8,981 License and development revenue — 2,500 2,500 — — — Operating expenses: General and administrative 482 372 854 587 723 1,310 Sales and marketing 2,229 1,383 3,612 2,101 2,069 4,170 Research and development 692 4,371 5,063 546 3,459 4,005 Amortization of intangibles 315 — 315 317 — 317 Operating expenses 3,718 6,126 9,844 3,551 6,251 9,802 Operating income (loss) $ 10,396 $ (3,626 ) 6,770 $ 5,317 $ (6,138 ) (821 ) Less: Corporate operating expenses 8,439 10,525 Consolidated operating loss (1,669 ) (11,346 ) Non-operating income (expenses) 57 (122 ) Loss before income taxes $ (1,612 ) $ (11,468 )
Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block]	Three Months Ended June 30, Six Months Ended June 30, 2016 2015 2016 2015 Domestic product revenue $ 219 $ 922 $ 404 $ 1,186 International product revenue 11,754 9,562 21,620 15,162 Total product revenue $ 11,973 $ 10,484 $ 22,024 $ 16,348 Product revenue by country: China 25 % 4 % 15 % 4 % Egypt 19 % 3 % 11 % 9 % United States 2 % 9 % 2 % 7 % UAE 1 % 35 % 2 % 23 % Qatar * % 0 % 18 % 0 % Others ** 53 % 49 % 52 % 57 % Total 100 % 100 % 100 % 100 %

Note 11 - Concentrations (Table

Note 11 - Concentrations (Tables)	6 Months Ended
	Jun. 30, 2016
Accounts Payable, Major Suppliers [Member] | Supplier Concentration Risk [Member]
Notes Tables
Schedules of Concentration of Risk, by Risk Factor [Table Text Block]	June 30, 2016 December 31, 2015 Vendor A 26 % 0 % Vendor B 19 % 0 %
Sales Revenue, Net [Member] | Customer Concentration Risk [Member]
Notes Tables
Schedules of Concentration of Risk, by Risk Factor [Table Text Block]	Three Months Ended June 30, Six Months Ended June 30, 2016 2015 2016 2015 Customer A 20 % * % 12 % * % Customer B 11 % 6 % 6 % 4 % Customer E 4 % 9 % 4 % 10 % Customer C 1 % 1 % 19 % 1 % Customer F * % 30 % 1 % 22 %
Accounts Receivable [Member] | Customer Concentration Risk [Member]
Notes Tables
Schedules of Concentration of Risk, by Risk Factor [Table Text Block]	June 30, 2016 December 31, 2015 Customer A 24 % 8 % Customer B 13 % 2 % Customer C 6 % 18 % Customer D 4 % 26 %

Note 12 - Fair Value Measurem31

Note 12 - Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2016
Notes Tables
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]	June 30, 2016 Level 1 Level 2 Inputs Level 3 Inputs Assets: Available-for-sale securities $ 15,095 $ — $ 15,095 $ — Total assets $ 15,095 $ — $ 15,095 $ — December 31, 2015 Level 1 Level 2 Inputs Level 3 Inputs Assets: Available-for-sale securities $ 257 $ — $ 257 $ — Foreign currency put options 33 — 33 — Total assets $ 290 $ — $ 290 $ —

Note 1 - The Company and Summ32

Note 1 - The Company and Summary of Significant Accounting Policies (Details Textual) $ in Millions	3 Months Ended
	Jun. 30, 2016USD ($)
From Current Deferred Tax Assets to Noncurrent Deferred Tax Assets and Liabilities [Member]
Current Period Reclassification Adjustment	$ (1.1)
From Current Deferred Tax Assets to Noncurrent Deferred Tax Assets [Member]
Current Period Reclassification Adjustment	0.8
From Current Deferred Tax Assets to Noncurrent Deferred Tax Liabilities [Member]
Current Period Reclassification Adjustment	$ (0.3)

Note 2 - Goodwill and Other I33

Note 2 - Goodwill and Other Intangible Assets (Details Textual) - USD ($)	3 Months Ended	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2016	Dec. 31, 2015
Goodwill	$ 12,790,000	$ 12,790,000	$ 12,790,000
Goodwill, Period Increase (Decrease)	0	0
Goodwill, Impaired, Accumulated Impairment Loss	$ 0	$ 0

Note 2 - Identifiable Intangibl

Note 2 - Identifiable Intangible Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Developed Technology Rights [Member]
Gross carrying amount	$ 6,100	$ 6,100
Accumulated amortization	(4,016)	(3,711)
Accumulated impairment losses
Net carrying amount	2,084	2,389
Noncompete Agreements [Member]
Gross carrying amount	1,310	1,310
Accumulated amortization	(1,310)	(1,310)
Accumulated impairment losses
Net carrying amount
Order or Production Backlog [Member]
Gross carrying amount	1,300	1,300
Accumulated amortization	(1,300)	(1,300)
Accumulated impairment losses
Net carrying amount
Trademarks [Member]
Gross carrying amount	1,200	1,200
Accumulated amortization	(180)	(180)
Accumulated impairment losses	(1,020)	(1,020)
Net carrying amount
Customer Relationships [Member]
Gross carrying amount	990	990
Accumulated amortization	(990)	(990)
Accumulated impairment losses
Net carrying amount
Patents [Member]
Gross carrying amount	585	585
Accumulated amortization	(411)	(401)
Accumulated impairment losses	(42)	(42)
Net carrying amount	132	142
Gross carrying amount	11,485	11,485
Accumulated amortization	(8,207)	(7,892)
Accumulated impairment losses	(1,062)	(1,062)
Net carrying amount	$ 2,216	$ 2,531

Note 3 - Computation of Basic a

Note 3 - Computation of Basic and Diluted Loss Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Numerator:
Net loss	$ 456	$ (3,327)	$ (1,510)	$ (11,610)
Denominator:
Basic weighted average common shares outstanding (in shares)	52,369	52,026	52,288	51,987
Weighted average effect of dilutive stock awards (in shares)	3,329
Diluted weighted average common shares outstanding (in shares)	55,698	52,026	52,288	51,987
Net income (loss) per share - basic (in dollars per share)	$ 0.01	$ (0.06)	$ (0.03)	$ (0.22)
Net income (loss) per share - diluted (in dollars per share)	$ 0.01	$ (0.06)	$ (0.03)	$ (0.22)

Note 3 - Antidilutive Securitie

Note 3 - Antidilutive Securities Excluded From Computation of Diluted Earnings Per Share (Details) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Employee Stock Option [Member]
Antidilutive securities excluded from computation of earnings per share (in shares)	3,937	8,267	7,234	8,267
Warrant [Member]
Antidilutive securities excluded from computation of earnings per share (in shares)		200		200
Restricted Stock and Restricted Stock Units [Member]
Antidilutive securities excluded from computation of earnings per share (in shares)	182		214

Note 4 - Other Financial Info37

Note 4 - Other Financial Information (Details Textual)	6 Months Ended
	Jun. 30, 2016USD ($)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	$ 0

Note 4 - Restricted Cash (Detai

Note 4 - Restricted Cash (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Collateral for Standby Letters of Credit [Member]
Current collateral for stand-by letters of credit	$ 1,058	$ 1,490
Non-current collateral for stand-by letters of credit	3,065	2,317
Current collateral for stand-by letters of credit	1,058	1,490
Non-current collateral for stand-by letters of credit	3,065	2,317
Restricted Cash and Cash Equivalents	$ 4,123	$ 3,807

Note 4 - Inventories (Details)

Note 4 - Inventories (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Raw materials	$ 2,174	$ 2,590
Work in process	1,896	1,689
Finished goods	2,108	2,224
Inventories	$ 6,178	$ 6,503

Note 4 - Prepaid Expenses and O

Note 4 - Prepaid Expenses and Other Current Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Foreign currency put option		$ 33
Interest receivable	108	4
Supplier advances	110	171
Prepaid rent	152	7
Other prepaid expenses and current assets	902	728
Total prepaid and other current assets	$ 1,272	$ 943

Note 4 - Accrued Expenses and O

Note 4 - Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Payroll and commissions payable	$ 2,478	$ 5,086
Accrued legal expenses	497	217
Other accrued expenses and current liabilities	2,258	2,505
Accrued expenses and other current liabilities	$ 5,233	$ 7,808

Note 4 - Accumulated Other Comp

Note 4 - Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Foreign currency translation. balance			$ (63)
Unrealized gains (losses) on investments. balance			(1)
Total accumulated other comprehensive income. balance			(64)
Foreign currency translation. balance	$ 6	$ (6)	(6)	$ 25
Unrealized gains (losses) on investments. balance	(32)	$ (2)	(31)	$ 1
Total accumulated other comprehensive income. balance			(37)
Foreign currency translation. balance	(69)		(69)
Unrealized gains (losses) on investments. balance	(32)		(32)
Total accumulated other comprehensive income. balance	$ (101)		$ (101)

Note 5 - Investments (Details T

Note 5 - Investments (Details Textual)	6 Months Ended
	Jun. 30, 2016USD ($)
Proceeds from Sale of Available-for-sale Securities	$ 0

Note 5 - Available-for-sale Sec

Note 5 - Available-for-sale Securities (Details) - Short-term Investments [Member] - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Corporate Debt Securities [Member]
Amortized cost	$ 15,127	$ 258
Gross unrealized holding gains
Gross unrealized holding losses	(32)	(1)
Available-for-sale securities	15,095	257
Amortized cost	15,127	258
Gross unrealized holding gains
Gross unrealized holding losses	(32)	(1)
Available-for-sale securities	$ 15,095	$ 257

Note 5 - Gross Unrealized Losse

Note 5 - Gross Unrealized Losses and Fair Values of Investments (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Corporate Debt Securities [Member]
Fair value, less than 12 month	$ 14,843
Gross unrealized losses, less than 12 months	(32)
Fair value, 12 months or greater	252	257
Gross unrealized losses, 12 months or greater		(1)
Fair value, total	15,095	257
Gross unrealized losses, total	(32)	(1)
Fair value, less than 12 month	14,843
Gross unrealized losses, less than 12 months	(32)
Fair value, 12 months or greater	252	257
Gross unrealized losses, 12 months or greater		(1)
Fair value, total	15,095	257
Gross unrealized losses, total	$ (32)	$ (1)

Note 5 - Amortized Cost and Fai

Note 5 - Amortized Cost and Fair Value of Available-for-sale Securities (Details) $ in Thousands	Jun. 30, 2016USD ($)
Due in one year or less	$ 15,127
Due in one year or less	15,095
Total available-for-sale securities	15,127
Total available-for-sale securities	$ 15,095

Note 6 - Long-term Debt and L47

Note 6 - Long-term Debt and Lines of Credit (Details Textual) - USD ($)	1 Months Ended
	Jun. 30, 2012	Jun. 30, 2016	Dec. 31, 2015	Mar. 31, 2015
The 2012 Agreement [Member] | Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Basis Spread on Variable Rate	1.25%
The 2012 Agreement [Member] | Revolving Credit Facility [Member]
Long-term Line of Credit		$ 0	$ 0
Line of Credit Facility, Maximum Borrowing Capacity	$ 10,000,000
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	0.25%
The 2012 Agreement [Member] | Standby Letters of Credit [Member]
Line of Credit Facility, Capacity Available for Trade Purchases	$ 16,000,000
The 2012 Agreement [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 16,000,000
Cash Collateral Balance Required by Credit Agreement	101.00%
March Two Thousand Fifteen Installment Loan [Member]
Long-term Debt		43,000	48,000	$ 55,000
Debt Instrument, Interest Rate, Stated Percentage				6.35%
The 2009 Agreement [Member] | Standby Letters of Credit [Member]
Long-term Line of Credit		4,100,000	3,800,000
The 2009 Agreement [Member] | Collateral for Standby Letters of Credit [Member]
Restricted Cash and Cash Equivalents		4,100,000	3,800,000
Long-term Debt		43,000
Restricted Cash and Cash Equivalents		$ 4,123,000	$ 3,807,000

Note 6 - Long-term Debt (Detail

Note 6 - Long-term Debt (Details) - USD ($)	Jun. 30, 2016	Dec. 31, 2015	Mar. 31, 2015
March Two Thousand Fifteen Installment Loan [Member]
Loan payable	$ 43,000	$ 48,000	$ 55,000
Less: current portion	(10,000)	(10,000)
Total long-term debt	33,000	38,000
Loan payable	43,000
Less: current portion	(10,000)	(10,000)
Total long-term debt	$ 33,000	$ 38,000

Note 6 - Future Minimum Princip

Note 6 - Future Minimum Principal Payments Due Under Long-term Debt Arrangements (Details) $ in Thousands	Jun. 30, 2016USD ($)
2016 (remaining six months)	$ 5
2,017	11
2,018	11
2,019	12
2,020	4
Total debt	$ 43

Note 7 - Equity (Details Textua

Note 7 - Equity (Details Textual) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2016	Mar. 31, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Jul. 27, 2016	Jun. 23, 2016	May 30, 2016	Jan. 31, 2016
Chief Compliance Officer [Member]
Allocated Share-based Compensation Expense		$ 500	$ 1,300		$ 1,300
Board of Directors Chairman [Member]
Stock Repurchase Program, Authorized Amount									$ 6,000
Treasury Stock, Shares, Acquired				673,700
Treasury Stock, Value, Acquired, Cost Method				$ 4,100
New Repurchase Program [Member]
Stock Repurchase Program, Authorized Amount								$ 10,000
Treasury Stock, Shares, Acquired				454,100
Treasury Stock, Value, Acquired, Cost Method				$ 4,300
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period				4 years
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period				10 years
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized	$ 6,800			$ 6,800
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition				2 years 270 days
Restricted Stock [Member]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized	1,300			$ 1,300
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition				3 years 255 days
The 2016 Incentive Plan [Member] | Subsequent Event [Member]
Common Stock, Capital Shares Reserved for Future Issuance						4,441,083
The 2016 Incentive Plan [Member]
Common Stock, Capital Shares Reserved for Future Issuance							4,441,083
The 2008 Equity Incentive Plan [Member]
Common Stock, Capital Shares Reserved for Future Issuance							7,635,410
Allocated Share-based Compensation Expense	$ 677		$ 1,913	$ 1,865	$ 3,053
Share Price	$ 8.89			$ 8.89

Note 7 - Share-based Compensati

Note 7 - Share-based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Employees and Consultants [Member] | Cost of Sales [Member]
Allocated Share-based Compensation	$ 24	$ 37	$ 62	$ 72
Employees and Consultants [Member] | General and Administrative Expense [Member]
Allocated Share-based Compensation	373	1,679	1,257	2,576
Employees and Consultants [Member] | Selling and Marketing Expense [Member]
Allocated Share-based Compensation	125	106	284	207
Employees and Consultants [Member] | Research and Development Expense [Member]
Allocated Share-based Compensation	155	91	262	198
Allocated Share-based Compensation	$ 677	$ 1,913	$ 1,865	$ 3,053

Note 7 - Summary of Stock Optio

Note 7 - Summary of Stock Option Activity (Details) - USD ($)		6 Months Ended	12 Months Ended
		Jun. 30, 2016	Dec. 31, 2015
Options outstanding, beginning balance (in shares)		7,198,479
Weighted average exercise price, beginning balance (in dollars per share)		$ 3.97
Weighted average remaining contractual life, beginning balance		7 years 73 days	7 years
Aggregate intrinsic value	[1]	$ 31,185,000	$ 22,875,000
Options outstanding, granted (in shares)		872,017
Weighted average exercise price, granted (in dollars per share)		$ 8.49
Options outstanding, exercised (in shares)		(783,042)
Weighted average exercise price, exercised (in dollars per share)		$ 3.21
Options outstanding, forfeited (in shares)		(53,316)
Weighted average exercise price, forfeited (in dollars per share)		$ 5.44
Options outstanding, ending balance (in shares)		7,234,138	7,198,479
Weighted average exercise price, ending balance (in dollars per share)		$ 4.58	$ 3.97
Options outstanding, vested and exercisable (in shares)		4,439,757
Weighted average exercise price, vested and exercisable (in dollars per share)		$ 4.20
Weighted average remaining contractual life, vested and exercisable		6 years 36 days
Aggregate intrinsic value, vested and exercisable	[1]	$ 20,838,000
Options outstanding, vested and exercisable and expected to vest thereafter (in shares)	[2]	6,780,263
Weighted average exercise price, vested and exercisable and expected to vest thereafter (in dollars per share)	[2]	$ 4.53
Weighted average remaining contractual life, vested and exercisable and expected to vest thereafter	[2]	7 years
Aggregate intrinsic value, vested and exercisable and expected to vest thereafter	[1],[2]	$ 29,888,000
[1]	The aggregate intrinsic value is calculated as the difference between the exercise price of the underlying options and the fair value of our common stock as of June 30, 2016 of $8.89 per share
[2]	Options that are expected to vest are net of estimated future option forfeitures in accordance with the provisions of ASC 718, “Compensation — Stock Compensation.”

Note 7 - Restricted Stock Activ

Note 7 - Restricted Stock Activity (Details) - Restricted Stock [Member]	6 Months Ended
	Jun. 30, 2016$ / sharesshares
Shares (in shares) | shares
Weighted Average Grant-Date Fair Value (in dollars per share) | $ / shares
Awarded (in shares) | shares	213,514
Awarded (in dollars per share) | $ / shares	$ 8.65
Shares, Vested (in shares) | shares
Weighted Average Grant-Date Fair Value, Vested (in dollars per share) | $ / shares
Forfeited (in shares) | shares
Forfeited (in dollars per share) | $ / shares
Shares (in shares) | shares	213,514
Weighted Average Grant-Date Fair Value (in dollars per share) | $ / shares	$ 8.65

Note 8 - Income Taxes (Details

Note 8 - Income Taxes (Details Textual) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Effective Income Tax Rate Reconciliation, Percent	6.30%	1.23%
Deferred Tax Assets, Valuation Allowance			$ 21.4

Note 9 - Commitments and Cont55

Note 9 - Commitments and Contingencies (Details Textual) - USD ($)	6 Months Ended
	Jun. 30, 2016	Dec. 31, 2015
Indemnification Agreement [Member]
Guarantor Obligations, Current Carrying Value	$ 0	$ 0
Minimum [Member]
Warranty and Product Performance Guarantees as Percentage of Total Sales Agreement	5.00%
Warranty and Product Performance Guarantees, Period	2 years
Maximum [Member]
Warranty and Product Performance Guarantees as Percentage of Total Sales Agreement	15.00%
Warranty and Product Performance Guarantees, Period	5 years 240 days
Long-term Purchase Commitment, Amount	$ 1,400,000
Letters of Credit Outstanding, Amount	4,100,000
Restricted Cash Used to Collateralize Irrevocable Standby Letters of Credit	$ 4,100,000

Note 9 - Operating Lease Obliga

Note 9 - Operating Lease Obligations (Details) $ in Thousands	Jun. 30, 2016USD ($)
2016 (remaining six months)	$ 838
2,017	1,642
2,018	1,603
2,019	1,402
Total future minimum lease payments	$ 5,485

Note 9 - Product Warranty Liabi

Note 9 - Product Warranty Liability (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Balance, beginning of period	$ 428	$ 756	$ 461	$ 755
Warranty costs charged to cost of revenue	54	(6)	96	15
Release of accrual for expired warranties	(71)		(146)
Utilization of warranty		(3)		(23)
Balance, end of period	$ 411	$ 747	$ 411	$ 747

Note 10 - Summary of Financial

Note 10 - Summary of Financial Information by Segment (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Operating Segments [Member] | Water [Member]
Product revenue	$ 11,973,000	$ 10,484,000	$ 22,024,000	$ 16,207,000
Product cost of revenue	4,236,000	4,836,000	7,910,000	7,339,000
Product gross profit	7,737,000	5,648,000	14,114,000	8,868,000
General and administrative	263,000	(17,000)	482,000	587,000
Sales and marketing	1,100,000	931,000	2,229,000	2,101,000
Research and development	333,000	201,000	692,000	546,000
Amortization of intangibles	158,000	158,000	315,000	317,000
Operating expenses	1,854,000	1,273,000	3,718,000	3,551,000
Operating income (loss)	5,883,000	4,375,000	10,396,000	5,317,000
Operating Segments [Member] | Oil and Gas [Member]
Product revenue				141,000
Product cost of revenue				28,000
Product gross profit				113,000
Licenses Revenue	1,250,000		2,500,000
General and administrative	184,000	391,000	372,000	723,000
Sales and marketing	576,000	949,000	1,383,000	2,069,000
Research and development	2,074,000	1,299,000	4,371,000	3,459,000
Operating expenses	2,834,000	2,639,000	6,126,000	6,251,000
Operating income (loss)	(1,584,000)	(2,639,000)	(3,626,000)	(6,138,000)
Operating Segments [Member]
Product revenue	11,973,000	10,484,000	22,024,000	16,348,000
Product cost of revenue	4,236,000	4,836,000	7,910,000	7,367,000
Product gross profit	7,737,000	5,648,000	14,114,000	8,981,000
Licenses Revenue	1,250,000		2,500,000
General and administrative	447,000	374,000	854,000	1,310,000
Sales and marketing	1,676,000	1,880,000	3,612,000	4,170,000
Research and development	2,407,000	1,500,000	5,063,000	4,005,000
Amortization of intangibles	158,000	158,000	315,000	317,000
Operating expenses	4,688,000	3,912,000	9,844,000	9,802,000
Operating income (loss)	4,299,000	1,736,000	6,770,000	(821,000)
Corporate, Non-Segment [Member]
Operating expenses	3,819,000	5,012,000	8,439,000	10,525,000
Product revenue	11,973,000	10,484,000	22,024,000	16,348,000
Product cost of revenue	4,236,000	4,836,000	7,910,000	7,367,000
Product gross profit	7,737,000	5,648,000	14,114,000	8,981,000
Licenses Revenue	1,250,000	0	2,500,000	0
General and administrative	3,992,000	5,362,000	8,876,000	11,640,000
Sales and marketing	1,935,000	1,994,000	4,005,000	4,427,000
Research and development	2,422,000	1,410,000	5,087,000	3,943,000
Amortization of intangibles	158,000	158,000	315,000	317,000
Operating expenses	8,507,000	8,924,000	18,283,000	20,327,000
Operating income (loss)	480,000	(3,276,000)	(1,669,000)	(11,346,000)
Non-operating income	79,000	20,000	57,000	(122,000)
Income (loss) before income taxes	$ 559,000	$ (3,256,000)	$ (1,612,000)	$ (11,468,000)

Note 10 - Revenues by Geographi

Note 10 - Revenues by Geographic Area (Details) - USD ($) $ in Thousands		3 Months Ended			6 Months Ended
		Jun. 30, 2016		Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Domestic [Member]
Product revenue		$ 219		$ 922	$ 404	$ 1,186
International [Member]
Product revenue		$ 11,754		$ 9,562	$ 21,620	$ 15,162
CHINA | Sales Revenue, Net [Member] | Geographic Concentration Risk [Member]
Concentration Risk, Percentage		25.00%		4.00%	15.00%	4.00%
EGYPT | Sales Revenue, Net [Member] | Geographic Concentration Risk [Member]
Concentration Risk, Percentage		19.00%		3.00%	11.00%	9.00%
UNITED STATES | Sales Revenue, Net [Member] | Geographic Concentration Risk [Member]
Concentration Risk, Percentage		2.00%		9.00%	2.00%	7.00%
UNITED ARAB EMIRATES | Sales Revenue, Net [Member] | Geographic Concentration Risk [Member]
Concentration Risk, Percentage		1.00%		35.00%	2.00%	23.00%
QATAR | Sales Revenue, Net [Member] | Geographic Concentration Risk [Member]
Concentration Risk, Percentage			[1]	0.00%	18.00%	0.00%
Others [Member] | Sales Revenue, Net [Member] | Geographic Concentration Risk [Member]
Concentration Risk, Percentage	[2]	53.00%		49.00%	52.00%	57.00%
Sales Revenue, Net [Member] | Geographic Concentration Risk [Member]
Concentration Risk, Percentage		100.00%		100.00%	100.00%	100.00%
Product revenue		$ 11,973		$ 10,484	$ 22,024	$ 16,348
[1]	Less than 1%.
[2]	Includes remaining countries not separately disclosed. No country in this line item accounted for more than 10% of our net revenue during the periods presented.

Note 11 - Concentrations (Detai

Note 11 - Concentrations (Details Textual) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
License and Development Revenue [Member] | Customer Concentration Risk [Member] | Customer G [Member]
Concentration Risk, Percentage	100.00%		100.00%
Licenses Revenue	$ 1,250,000	$ 0	$ 2,500,000	$ 0

Note 11 - Accounts Receivable C

Note 11 - Accounts Receivable Concentrations (Details) - Accounts Receivable [Member] - Customer Concentration Risk [Member]	6 Months Ended	12 Months Ended
	Jun. 30, 2016	Dec. 31, 2015
Customer A [Member]
Concentration Risk, Percentage	24.00%	8.00%
Customer B [Member]
Concentration Risk, Percentage	13.00%	2.00%
Customer C [Member]
Concentration Risk, Percentage	6.00%	18.00%
Customer D [Member]
Concentration Risk, Percentage	4.00%	26.00%

Note 11 - Revenue Concentration

Note 11 - Revenue Concentrations (Details) - Sales Revenue, Net [Member] - Customer Concentration Risk [Member]	3 Months Ended			6 Months Ended
	Jun. 30, 2016		Jun. 30, 2015	Jun. 30, 2016		Jun. 30, 2015
Customer A [Member]
Percentage of revenue	20.00%			12.00%	[1]
Customer B [Member]
Percentage of revenue	11.00%		6.00%	6.00%		4.00%
Customer E [Member]
Percentage of revenue	4.00%		9.00%	4.00%		10.00%
Customer C [Member]
Percentage of revenue	1.00%	[1]	1.00%	19.00%		1.00%
Customer F [Member]
Percentage of revenue			30.00%	1.00%		22.00%
[1]	Less than 1% or none.

Note 11 - Supplier Concentratio

Note 11 - Supplier Concentrations (Details) - Accounts Payable, Major Suppliers [Member] - Supplier Concentration Risk [Member]	6 Months Ended	12 Months Ended
	Jun. 30, 2016	Dec. 31, 2015
Vendor A [Member]
Percentage of accounts payable	26.00%	0.00%
Vendor B [Member]
Percentage of accounts payable	19.00%	0.00%

Note 12 - Fair Value of Financi

Note 12 - Fair Value of Financial Assets and Liabilities Measured on a Recurring Basis (Details) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Fair Value, Inputs, Level 2 [Member]
Assets:
Available-for-sale securities	$ 15,095	$ 257
Total assets	15,095	290
Foreign currency put option		33
Available-for-sale securities	15,095	257
Total assets	$ 15,095	290
Foreign currency put option		$ 33

Note 13 - Related Party Trans65

Note 13 - Related Party Transactions (Details Textual) - USD ($)	Mar. 31, 2016	Jan. 31, 2016	Jun. 30, 2016	Jun. 30, 2016
Director [Member] | Office Space Lease [Member]
Lessee Leasing Arrangements, Operating Leases, Term of Contract		90 days
Related Party Transaction, Expenses from Transactions with Related Party			$ 2,502	$ 4,170
Unspecified Employee [Member] | Non-interest Bearing Loan [Member]
Related Party Transaction, Due from (to) Related Party, Current	$ 21,786		$ 10,893	$ 10,893
Related Party Transaction, Due from Related Parties, Repayment Term	180 days

Note 14 - Subsequent Events (De

Note 14 - Subsequent Events (Details Textual) - Subsequent Event [Member] - IsoBoost Supply Commitment [Member] $ in Millions	Jul. 18, 2016USD ($)
Long-term Contract, Potential Amount	$ 11
Long-term Contract, Initial Amount	7
Long-term Contract, Potential Additional Amount	$ 4