Energy Recovery (ERII) 10-Q 6 Aug 15 2015 Q2 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	6 Months Ended
	Jun. 30, 2015	Aug. 03, 2015
Document and Entity Information [Abstract]
Entity Registrant Name	Energy Recovery, Inc.
Trading Symbol	ERII
Document Type	10-Q
Current Fiscal Year End Date	--12-31
Entity Common Stock, Shares Outstanding		52,231,186
Amendment Flag	false
Entity Central Index Key	1,421,517
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Accelerated Filer
Entity Well-known Seasoned Issuer	No
Document Period End Date	Jun. 30, 2015
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus	Q2

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 18,107	$ 15,501
Restricted cash	1,347	2,623
Short-term investments	4,713	13,072
Accounts receivable, net of allowance for doubtful accounts of $162 and $155 at June 30, 2015 and December 31, 2014, respectively	7,429	10,941
Unbilled receivables, current	1,193	1,343
Inventories	9,703	8,204
Deferred tax assets, net	240	240
Prepaid expenses and other current assets	1,080	1,317
Total current assets	43,812	53,241
Restricted cash, non-current	1,704	2,850
Unbilled receivables, non-current	504	414
Long-term investments	262	267
Property and equipment, net of accumulated depreciation of $16,777 and $15,143 at June 30, 2015 and December 31, 2014, respectively	12,085	13,211
Goodwill	12,790	12,790
Other intangible assets, net	2,849	3,166
Other assets, non-current	2	2
Total assets	74,008	85,941
Current liabilities:
Accounts payable	2,366	1,817
Accrued expenses and other current liabilities	4,886	8,427
Income taxes payable	8	4
Accrued warranty reserve	747	755
Deferred revenue	1,224	519
Current portion of long-term debt	11
Total current liabilities	9,242	11,522
Long-term debt, net of current portion	42
Deferred tax liabilities, non-current, net	2,119	1,989
Deferred revenue, non-current	68	59
Other non-current liabilities	839	2,453
Total liabilities	$ 12,310	$ 16,023
Commitments and Contingencies (Note 9)
Stockholders’ equity:
Preferred stock, $0.001 par value; 10,000,000 shares authorized; no shares issued or outstanding
Common stock, $0.001 par value; 200,000,000 shares authorized; 54,510,642 shares issued and 52,031,186 shares outstanding at June 30, 2015, and 54,398,421 shares issued and 51,918,965 shares outstanding at December 31, 2014	$ 55	$ 54
Additional paid-in capital	127,803	124,440
Accumulated other comprehensive loss	(47)	(73)
Treasury stock, at cost 2,479,456 shares repurchased at both June 30, 2015 and December 31, 2014	(6,835)	(6,835)
Accumulated deficit	(59,278)	(47,668)
Total stockholders’ equity	61,698	69,918
Total liabilities and stockholders’ equity	$ 74,008	$ 85,941

Condensed Consolidated Balance3

Condensed Consolidated Balance Sheets (Unaudited) (Parentheticals) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Allowance for doubtful accounts (in Dollars)	$ 162	$ 155
Property and equipment, accumulated depreciation (in Dollars)	$ 16,777	$ 15,143
Preferred stock, par value (in Dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value (in Dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	54,510,642	54,398,421
Common stock, shares outstanding	54,398,421	51,918,965
Treasury stock, at cost, shares	2,479,456	2,479,456

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Net revenue	$ 10,484	$ 6,407	$ 16,348	$ 10,304
Cost of revenue	4,836	3,332	7,367	4,984
Gross profit	5,648	3,075	8,981	5,320
Operating expenses:
General and administrative	5,362	2,995	11,640	5,034
Sales and marketing	1,994	2,702	4,427	5,197
Research and development	1,410	1,724	3,943	2,958
Amortization of intangible assets	158	215	317	430
Total operating expenses	8,924	7,636	20,327	13,619
Loss from operations	(3,276)	(4,561)	(11,346)	(8,299)
Interest expense			(40)
Other non-operating (expense) income	20	8	(82)	129
Loss before income taxes	(3,256)	(4,553)	(11,468)	(8,170)
Provision for income taxes	71	58	142	124
Net loss	$ (3,327)	$ (4,611)	$ (11,610)	$ (8,294)
Basic and diluted net loss per share (in Dollars per share)	$ (0.06)	$ (0.09)	$ (0.22)	$ (0.16)
Shares used in basic and diluted per share calculation (in Shares)	52,026	51,566	51,987	51,506

Condensed Consolidated Stateme5

Condensed Consolidated Statements of Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Net loss	$ (3,327)	$ (4,611)	$ (11,610)	$ (8,294)
Other comprehensive (loss) income, net of tax:
Foreign currency translation adjustments	(6)	3	25	46
Unrealized (loss) gain on investments	(2)	16	1	18
Other comprehensive (loss) income	(8)	19	26	64
Comprehensive loss	$ (3,335)	$ (4,592)	$ (11,584)	$ (8,230)

Condensed Consolidated Stateme6

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Cash Flows From Operating Activities
Net loss	$ (11,610)	$ (8,294)
Adjustments to reconcile net loss to net cash used in operating activities:
Share-based compensation	3,053	1,215
Depreciation and amortization	1,959	1,998
Deferred income taxes	131	111
Amortization of premiums/discounts on investments	130	239
Other non-cash adjustments	86	(153)
Provision for doubtful accounts	59	126
Valuation adjustments for excess or obsolete inventory	21	43
Unrealized loss on foreign currency transactions	21	41
Provision for warranty claims	15	48
Changes in operating assets and liabilities:
Accounts receivable	3,472	5,724
Deferred revenue	714	153
Accounts payable	549	610
Prepaid and other assets	239	(213)
Unbilled receivables	60	5,281
Income taxes payable	4	4
Inventories	(1,520)	(4,683)
Litigation settlement	(1,700)
Accrued expenses and other liabilities	(3,633)	(2,443)
Net cash used in operating activities	(7,950)	(193)
Cash Flows From Investing Activities
Maturities of marketable securities	8,235	4,065
Restricted cash	2,422	(192)
Capital expenditures	(429)	(2,140)
Net cash provided by investing activities	10,228	1,733
Cash Flows From Financing Activities
Net proceeds from issuance of common stock	293	1,138
Proceeds from borrowings	55
Repayment of long-term debt	(2)
Repurchase of common stock for treasury		(633)
Net cash provided by financing activities	346	505
Effect of exchange rate differences on cash and cash equivalents	(18)	31
Net change in cash and cash equivalents	2,606	2,076
Cash and cash equivalents, beginning of period	15,501	14,371
Cash and cash equivalents, end of period	$ 18,107	$ 16,447

Note 1 - The Company and Summar

Note 1 - The Company and Summary of Significant Accounting Policies	6 Months Ended
	Jun. 30, 2015
Accounting Policies [Abstract]
Significant Accounting Policies [Text Block]	Note 1 — The Company and Summary of Significant Accounting Policies The Company Energy Recovery, Inc. (the “Company”, “Energy Recovery”, “we”, “our”, or “us”) is an energy solutions provider. We convert wasted pressure energy into a reusable asset and preserve or eliminate pumping technology in hostile processing environments. Our core competencies are fluid dynamics and advanced material science. Our products are marketed and sold in fluid flow markets, such as desalination and oil & gas, under the trademarks ERI ® , PX ® , Pressure Exchanger ® , PX Pressure Exchanger ® IsoBoost ® , IsoGen ® , and VorTeq ® . Our products are developed and manufactured in the United States of America (“U.S.”) at our headquarters in San Leandro, California, and we have five wholly-owned subsidiaries: Energy Recovery Iberia, S.L., Energy Recovery Canada Corp., ERI Energy Recovery Ireland Ltd., Energy Recovery (Cayman) Ltd., and ERI Energy Recovery Holdings Ireland Limited. We also have sales offices in Dubai, United Arab Emirates and Shanghai, Peoples Republic of China. Use of Estimates The preparation of condensed consolidated financial statements in conformity with U.S. generally accepted accounting principles (“U.S. GAAP”) requires our management to make judgments, assumptions, and estimates that affect the amounts reported in the condensed consolidated financial statements and accompanying notes. Our more significant estimates and judgments that we believe are the most critical to aid in fully understanding and evaluating our reported financial results are revenue recognition; allowance for doubtful accounts; allowance for product warranty; valuation of stock options; valuation and impairment of goodwill, long-lived assets, and acquired intangible assets; useful lives for depreciation and amortization; valuation adjustments for excess and obsolete inventory; 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, 2014 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, 2014 included in our Annual Report on Form 10-K filed with the SEC on March 6, 2015. 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”) 2014-09, Revenue from Contracts with Customers. On July 9, 2015, the FASB voted to approve a one-year deferral of the effective date of ASU 2014-09. Based on the FASB’s decision, ASU 2014-09 will apply to us for annual reporting periods beginning after December 15, 2017, including interim reporting periods within annual reporting periods beginning after December 15, 2017. Additionally, the FASB decided to permit early adoption, but not before the original effective date (that is, annual periods beginning after December 15, 2016). The FASB expects to issue its final update formally amending the effective date by the end of the third quarter of 2015. In January 2015, the FASB issued ASU 2015-01, Income Statement – Extraordinary and Unusual Items. In April 2015, the FASB issued ASU 2015-03, Interest – Imputation of Interest. Also in April 2015, the FASB issued ASU 2015-05, Intangibles – Goodwill and Other- Internal-Use Software. In July 2015, the FASB issued ASU 2015-11, Inventory – Simplifying the Measurement of Inventory.

Note 2 - Goodwill and Other Int

Note 2 - Goodwill and Other Intangible Assets	6 Months Ended
	Jun. 30, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets Disclosure [Text Block]	Note 2 — Goodwill and Other Intangible Assets Goodwill as of June 30, 2015 and December 31, 2014 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, 2015, 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, 2015 Gross Carrying Amount Accumulated Amortization Accumulated Impairment Losses Net Carrying Amount Developed technology $ 6,100 $ (3,405 ) $ — $ 2,695 Non-compete agreements 1,310 (1,310 ) — — Backlog 1,300 (1,300 ) — — Trademarks 1,200 (180 ) (1,020 ) — Customer relationships 990 (990 ) — — Patents 585 (389 ) (42 ) 154 Total $ 11,485 $ (7,574 ) $ (1,062 ) $ 2,849 December 31, 2014 Gross Carrying Amount Accumulated Amortization Accumulated Impairment Losses Net Carrying Amount Developed technology $ 6,100 $ (3,101 ) $ — $ 2,999 Non-compete agreements 1,310 (1,310 ) — — Backlog 1,300 (1,300 ) — — Trademarks 1,200 (180 ) (1,020 ) — Customer relationships 990 (990 ) — — Patents 585 (376 ) (42 ) 167 Total $ 11,485 $ (7,257 ) $ (1,062 ) $ 3,166 Accumulated impairment losses at June 30, 2015 and December 31, 2014, include a $1.0 million impairment loss from 2012 for trademarks, a $31,000 loss for patents from 2007, and an $11,000 loss for patents from 2010.

Note 3 - Loss per Share

Note 3 - Loss per Share	6 Months Ended
	Jun. 30, 2015
Earnings Per Share [Abstract]
Earnings Per Share [Text Block]	Note 3 — Loss per Share Basic and diluted net loss per share is based on the weighted average number of common shares outstanding during the period. Potential dilutive securities are excluded from the calculation of loss per share, as their inclusion would be anti-dilutive. The following table shows the computation of basic and diluted loss per share (in thousands, except per share data): Three Months Ended June 30, Six Months Ended June 30, 2015 2014 2015 2014 Numerator: Net loss $ (3,327 ) $ (4,611 ) $ (11,610 ) $ (8,294 ) Denominator: Basic and diluted weighted average common shares outstanding 52,026 51,566 51,987 51,506 Basic and diluted net loss per share $ (0.06 ) $ (0.09 ) $ (0.22 ) $ (0.16 ) The following potential common shares were not considered in the computation of diluted loss per share because their effect would have been anti-dilutive (in thousands): Three and Six Months Ended June 30, 2015 2014 Stock options 8,267 7,573 Warrants 200 600

Note 4 - Other Financial Inform

Note 4 - Other Financial Information	6 Months Ended
	Jun. 30, 2015
Disclosure Text Block Supplement [Abstract]
Additional Financial Information Disclosure [Text Block]	Note 4 — Other Financial Information Restricted Cash We have pledged cash in connection with stand-by letters of credit. We have deposited a corresponding amount into a non-interest bearing account at one financial institution for these items as follows (in thousands): June 30, 2015 December 31, 2014 Collateral for stand-by letters of credit $ 1,347 $ 2,623 Current restricted cash $ 1,347 $ 2,623 Collateral for stand-by letters of credit $ 1,704 $ 2,850 Non-current restricted cash $ 1,704 $ 2,850 Total restricted cash $ 3,051 $ 5,473 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, 2015 December 31, 2014 Raw materials $ 2,743 $ 2,903 Work in process 2,331 1,915 Finished goods 4,629 3,386 Inventories $ 9,703 $ 8,204 Prepaid and Other Current Assets Prepaid expenses and other current assets consisted of the following (in thousands): June 30, 2015 December 31, 2014 Interest receivable $ 52 $ 112 Supplier advances 159 107 Other prepaid expenses and current assets 869 1,098 Total prepaid and other current assets $ 1,080 $ 1,317 Accrued Expenses and Other Current Liabilities Accrued expenses and other current liabilities consisted of the following (in thousands): June 30, 2015 December 31, 2014 Accrued legal expenses $ 188 $ 1,734 Payroll and commissions payable 2,368 3,116 Other accrued expenses and current liabilities 2,330 3,577 Accrued expenses and other current liabilities $ 4,886 $ 8,427 Other Non- Current Liabilities Other non- current liabilities consisted of the following (in thousands): June 30, 2015 December 31, 2014 Deferred rent expense, non-current $ 796 $ 866 Accrued legal expenses, non-current 43 1,587 Accrued expenses and other current liabilities $ 839 $ 2,453 A ccumulated Other Comprehensive Loss Changes in accumulated other comprehensive loss by component for the six months ended June 30, 2015 were as follows (in thousands): Foreign Currency Translation Adjustments Net of Tax Benefit Unrealized Gains (Losses) on Investments Total Accumulated Other Comprehensive Loss Balance, December 31, 2014 $ (67 ) $ (6 ) $ (73 ) Net other comprehensive income 25 1 26 Balance, June 30, 2015 $ (42 ) $ (5 ) $ (47 ) 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, 2015
Investments, Debt and Equity Securities [Abstract]
Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]	Note 5 — Investments Our short-term and long-term investments are all classified as available-for-sale. There were no sales of available-for-sale securities during the quarter ended June 30, 2015. Available-for-sale securities as of the dates indicated consisted of the following (in thousands): June 30, 2015 Amortized Cost Gross Unrealized Holding Gains Gross Unrealized Holding Losses Fair Value Short-term investments: Corporate notes and bonds $ 4,717 $ — $ (4 ) $ 4,713 Total short-term investments $ 4,717 $ — $ (4 ) $ 4,713 Long-term investments: Corporate notes and bonds $ 263 $ — $ (1 ) $ 262 Total long-term investments $ 263 $ — $ (1 ) $ 262 Total available-for-sale securities $ 4,980 $ — $ (5 ) $ 4,975 December 31, 201 4 Amortized Cost Gross Unrealized Holding Gains Gross Unrealized Holding Losses Fair Value Short-term investments State and local government obligations $ 225 $ — $ — $ 225 Corporate notes and bonds 12,851 4 (8 ) 12,847 Total short-term investments $ 13,076 $ 4 $ (8 ) $ 13,072 Long-term investments Corporate notes and bonds 268 — (1 ) 267 Total long-term investments $ 268 $ — $ (1 ) $ 267 Total investments $ 13,344 $ 4 $ (9 ) $ 13,339 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, 2015 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 $ 262 $ (1 ) $ 3,380 $ (4 ) $ 3,642 $ (5 ) Total $ 262 $ (1 ) $ 3,380 $ (4 ) $ 3,642 $ (5 ) December 31, 201 4 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 $ 5,085 $ (6 ) $ 1,205 $ (3 ) $ 6,290 $ (9 ) Total $ 5,085 $ (6 ) $ 1,205 $ (3 ) $ 6,290 $ (9 ) 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, 2015 are shown below by contractual maturity (in thousands): June 30, 2015 Amortized Cost Fair Value Due after one year through three years $ 4,980 $ 4,975 Total available-for-sale securities $ 4,980 $ 4,975

Note 6 - Long-Term Debt and Lin

Note 6 - Long-Term Debt and Lines of Credit	6 Months Ended
	Jun. 30, 2015
Debt Disclosure [Abstract]
Debt Disclosure [Text Block]	Note 6 — Long-Term Debt and Lines of Credit Debt In March 2015, we entered into a loan agreement with a financial institution for a $55,000 fixed-rate installment loan with 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, 2015 December 31, 2014 Loan payable $ 53 $ — Less: current portion (11 ) — Total long-term debt $ 42 $ — Future minimum principal payments due under long-term debt arrangements consist of the following (in thousands): June 30, 2015 2015 (remaining 6 months) $ 5 2016 11 2017 11 2018 11 2019 11 Thereafter 4 Total debt $ 53 Lines of Credit In June 2012, we entered into a loan agreement (the “2012 Agreement”) with a financial institution. The 2012 Agreement matured in June 2015 and 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 plus 0% 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, 2015 and December 31, 2014, there were no advances drawn under the 2012 Agreement, as amended. Remaining stand-by letters of credit collateralized under the 2012 Agreement, as amended, totaled $3.0 million and $3.1 million as of June 30, 2015 and December 31, 2014, respectively. Total cash restricted related to these stand-by letters of credit totaled $3.1 million as of June 30, 2015 and December 31, 2014. We are subject to certain financial and administrative covenants under the 2012 Agreement, as amended. As of June 30, 2015, we were in compliance with these covenants. In 2009, we entered into a loan and security agreement (the “2009 Agreement”) with another financial institution. The 2009 Agreement, as amended, provided a total available credit line of $16.0 million. Under the 2009 Agreement, we were allowed to draw advances of up to $10.0 million on a revolving line of credit or utilize up to $15.9 million as collateral for stand-by letters of credit, provided that the aggregate of the outstanding advances and collateral did not exceed the total available credit line of $16.0 million. Advances under the revolving line of credit incurred interest based on a prime rate index or LIBOR plus 1.375%. The 2009 Agreement, as amended, also required us to maintain cash collateral balances equal to at least 101% of the face amount of all outstanding stand-by letters of credit collateralized by the line of credit and 100% of the amount of all outstanding advances. The amended 2009 Agreement expired in May 2012, at which time we became required to maintain a cash collateral balance equal to at least 105% of the face amount of all outstanding stand-by letters of credit collateralized by the line of credit. There were no advances drawn under the 2009 Agreement’s credit line at the time it expired. Remaining stand-by letters of credit issued under the 2009 Agreement totaled zero and $2.3 million as of June 30, 2015 and December 31, 2014, respectively. Total cash restricted related to these stand-by letters of credit totaled zero and $2.4 million as of June 30, 2015 and December 31, 2014, respectively.

Note 7 - Equity

Note 7 - Equity	6 Months Ended
	Jun. 30, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Disclosure of Compensation Related Costs, Share-based Payments [Text Block]	Note 7 — Equity Share-Based Compensation Expense For the three and six months ended June 30, 2015 and 2014, we recognized share-based compensation expense related to employees and consultants as follows (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2015 2014 2015 2014 Cost of revenue $ 37 $ 26 $ 72 $ 48 General and administrative 1,679 365 2,576 694 Sales and marketing 106 155 207 308 Research and development 91 88 198 165 Total share-based compensation expense $ 1,913 $ 634 $ 3,053 $ 1,215 As of June 30, 2015, total unrecognized compensation cost related to non-vested share-based awards, net of estimated forfeitures, was $3.9 million, which is expected to be recognized as expense over a weighted average period of approximately 2.77 years. In February 2015, we granted 344,090 stock options to our non-employee directors. The vesting start date for options granted to incumbent non-employee directors was June 20, 2014, the date of our last annual meeting. The vesting start date for options granted to newly appointed non-employee directors was the date of grant. The options became fully vested on June 19, 2015, the date of our annual meeting; had an exercise price of $3.53 per share, as determined on the date of grant; and expire 10 years from the grant date. The total compensation cost associated with these option grants was recognized over the period from the grant date in February 2015 (which was determined to be the service inception date) to the vesting end date in June 2015. Accordingly, the six months ended June 30, 2015 includes compensation expense from the service inception date through the vesting end date of June 19, 2015. In March 2015, we granted 1,415,739 stock options to certain officers and other employees. The options vest over a four-year period, have an exercise price of $2.75 per share, and expire 10 years from the grant date. In connection with the resignation of Mr. Thomas S. Rooney, Jr. as President and Chief Executive Officer, additional stock based compensation of approximately $170,000 was recorded in the first quarter of 2015 related to the accelerated vesting of options previously granted to Mr. Rooney. In June 2015, we entered into a consulting agreement with Mr. Rooney, under which his unvested options outstanding on the first day of consultancy continue to vest for the period of consultancy and all vested options continue to be exercisable through the 90 day period following the last day of the consultancy. In connection with this modification, we recorded additional stock based compensation of approximately $1.1 million related to the additional vesting and extended exercise period in the three months ended June 30, 2015. In April 2015, Ms. Audrey Bold resigned as our Chief Marketing Officer. In connection with her resignation and the providing of a general release, the Company agreed to provide her with continued vesting of granted options during the six month period following her termination and the ability to exercise the vested options through the 90 days following this six month period. In connection with this modification, we recorded additional stock based compensation of approximately $43,000 related to the additional vesting and extended exercise period in the three months ended June 30, 2015. In June 2015, we granted 300,000 stock options to our new Chief Financial Officer and Vice President of Strategy. These options vest over a four year period, have an exercise price of $2.61 per share, and expire 10 years from the grant date. In June 2015, we granted 16,000 stock options to an employee. The options vest over a four year period, have an exercise price of $2.60 per share, and expire 10 years from the grant date. In June 2015, we granted 373,744 stock options to our non-employee directors. The vesting start date was June 23, 2015, the date of grant. The options will become fully vested on June 17, 2016, the anticipated date of our next annual meeting. The options have an exercise price of $2.92 per share, as determined on the date of grant, and expire 10 years from the grant date.

Note 8 - Income Taxes

Note 8 - Income Taxes	6 Months Ended
	Jun. 30, 2015
Income Tax Disclosure [Abstract]
Income Tax Disclosure [Text Block]	Note 8 — Income Taxes The effective tax rate for the six months ended June 30, 2015 and 2014 was (1.23%) and (1.5%), respectively. As of December 31, 2014, a full valuation allowance of approximately $20.4 million had been established to reduce our deferred income tax assets to the amount expected to be realized. As such, no tax benefit related to our pre-tax loss was recognized for the six months ended June 30, 2015, as there was no change in our assessment of the amount of deferred income tax assets expected to be realized.

Note 9 - Commitments and Contin

Note 9 - Commitments and Contingencies	6 Months Ended
	Jun. 30, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies Disclosure [Text Block]	Note 9 — Commitments and Contingencies Operating Lease Obligations We lease facilities under fixed non-cancellable operating leases that expire on various dates through November 2019. Future minimum lease payments consist of the following (in thousands): June 30, 2015 2015 (remaining six months) $ 805 2016 1,576 2017 1,567 2018 1,591 2019 1,398 Total future minimum lease payments $ 6,937 Product Warranty The following table summarizes the activity related to the product warranty liability during the three months ended June 30, 2015 and 2014 (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2015 2014 2015 2014 Balance, beginning of period $ 756 $ 705 $ 755 $ 709 Warranty costs charged to cost of revenue (6 ) 50 15 53 Utilization of warranty (3 ) (50 ) (23 ) (57 ) Balance, end of period $ 747 $ 705 $ 747 $ 705 Purchase Obligations We enter into purchase order arrangements with our vendors. As of June 30, 2015, 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, 2015, we had approximately $1.6 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, 2015 and December 31, 2014. In certain cases, we issue warranty and product performance guarantees to our customers for amounts ranging from 5% to 10% 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 65 months, and relate to the underlying product warranty period. The stand-by letters of credit are collateralized by restricted cash and our credit facility. All of the $3.0 million in outstanding stand-by letters of credit at June 30, 2015 was issued under the 2012 Agreement. The stand-by letters of credit outstanding at June 30, 2015 were collateralized by restricted cash of $3.1 million. Litigation 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 3, 2014, Mr. Blanco filed a labor claim against ERI Iberia in Madrid, Spain alleging breach of contract and termination without cause. The claim seeks wages (salary and bonus) of €567,000 and alleged stock option gains of €630,000. The matter has been delayed until November 2015. At this time, the Company has not determined that an award to Mr. Blanco is probable. In January 2015, two stockholder class action complaints were filed against the Company in 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 May 8, 2015, we entered into a post-judgment settlement and mutual general release agreement (the “Agreement”) in the matter entitled “Morgan Technical Ceramics, Inc v. Energy Recovery, Inc” in the County of Alameda, State of California. Under the Agreement, the Company in exchange for a general release paid $1.7 million to the plaintiffs. The Company had reserved the full amount of the judgment entered against it in the amount of approximately $1.9 million and consequently released $0.2 million from its legal reserve.

Note 10 - Business Segment and

Note 10 - Business Segment and Geographic Information	6 Months Ended
	Jun. 30, 2015
Segment Reporting [Abstract]
Segment Reporting Disclosure [Text Block]	Note 10 — Business Segment and Geographic Information We manufacture and sell high-efficiency energy recovery devices and pumps as well as related services under one reportable segment. Our chief operating decision-maker is the chief executive officer (“CEO”). The CEO reviews financial information presented on a consolidated basis for purposes of making operating decisions and assessing financial performance. Accordingly, we have concluded that we have one reportable segment. The following geographic information includes net revenue to our domestic and international customers based on the customers’ requested delivery locations, except for certain cases in which the customer directed us to deliver our products to a location that differs from the known ultimate location of use. In such cases, the ultimate location of use, rather than the delivery location, is reflected in the table below (in thousands, except percentages): Three Months Ended June 30, Six Months Ended June 30, 2015 2014 2015 2014 Domestic revenue $ 922 $ 235 $ 1,186 $ 584 International revenue 9,562 6,172 15,162 9,720 Total revenue $ 10,484 $ 6,407 $ 16,348 $ 10,304 Revenue by country: United Arab Emirates 35 % 2 % 23 % 3 % United States 9 4 7 6 Bahamas * 14 * 10 China 4 11 4 8 Israel 2 9 1 10 Others ** 50 60 65 63 Total 100 % 100 % 100 % 100 % * Less than 1%. ** Includes remaining countries not separately disclosed. No country in this line item accounted for more than 10% of our net revenue during the periods presented. All of our long-lived assets were located in the United States at June 30, 2015 and December 31, 2014.

Note 11 - Concentrations

Note 11 - Concentrations	6 Months Ended
	Jun. 30, 2015
Risks and Uncertainties [Abstract]
Concentration Risk Disclosure [Text Block]	Note 11 — Concentrations Customers accounting for 10% or more of our accounts receivable and unbilled receivables were as follows: June 30, 2015 December 31, 2014 Customer A 31 % — Customer B 15 % — Customer C 10 % 32 % Customer D 8 % 11 % Revenue from customers representing 10% or more of net revenue varies from period to period. For the periods indicated, customers representing 10% or more of net revenue were: Three Months Ended June 30, Six Months Ended June 30, 2015 2014 2015 2014 Customer A 30 % — 22 % — Customer B 9 % * 10 % 1 % Customer E 2 % 14 % 2 % 9 % * Less than 1%

Note 12 - Fair Value Measuremen

Note 12 - Fair Value Measurements	6 Months Ended
	Jun. 30, 2015
Fair Value Disclosures [Abstract]
Fair Value Disclosures [Text Block]	Note 12 — Fair Value Measurements The authoritative guidance for measuring fair value provides a hierarchy that prioritizes the inputs to valuation techniques used in measuring fair value as follows: Level 1 — Quoted prices (unadjusted) in active markets for identical assets or liabilities; Level 2 — Inputs other than quoted prices included within Level 1 that are either directly or indirectly observable; and Level 3 — Unobservable inputs in which little or no market activity exists, therefore requiring an entity to develop its own assumptions that market participants would use in pricing. The carrying values of cash and cash equivalents, restricted cash, accounts receivable, unbilled receivables, accounts payable, and other accrued expenses approximate fair value due to the short-term maturity of those instruments. For our investments in available-for-sale securities, if quoted prices in active markets for identical investments are not available to determine fair value (Level 1), then we use quoted prices for similar assets or inputs other than quoted prices that are observable either directly or indirectly (Level 2). The investments included in Level 2 consist primarily of corporate, and agency obligations. The fair value of financial assets and liabilities measured on a recurring basis for the indicated periods was as follows (in thousands): June 30, 2015 Level 1 Level 2 Inputs Level 3 Inputs Assets: Short-term available-for-sale securities $ 4,713 $ — $ 4,713 $ — Long-term available-for-sale securities 262 — 262 — Total assets $ 4,975 $ — $ 4,975 $ — December 31, 2014 Level 1 Level 2 Inputs Level 3 Inputs Assets: Short-term available-for-sale securities $ 13,072 $ — $ 13,072 $ — Long-term available-for-sale securities 267 — 267 — Total assets $ 13,339 $ — $ 13,339 $ —

Note 13 - Subsequent Events

Note 13 - Subsequent Events	6 Months Ended
	Jun. 30, 2015
Subsequent Events [Abstract]
Subsequent Events [Text Block]	Note 13 — S ubsequent Events On July 1, 2015, warrants to purchase 200,000 shares of our common stock were exercised for cash at a price of $1.00 per share. The proceeds from this exercise totaled $200,000. This exercise represents the last outstanding warrant issued in 2005. Subsequent to June 30, 2015, the Company adopted a new organizational structure based on the operating segments Water and Oil & Gas. In accordance with GAAP, segment information on this basis will be presented commencing in the period of change and will be included for the quarter ended September 30, 2015.

Accounting Policies, by Policy

Accounting Policies, by Policy (Policies)	6 Months Ended
	Jun. 30, 2015
Accounting Policies [Abstract]
Use of Estimates, Policy [Policy Text Block]	Use of Estimates The preparation of condensed consolidated financial statements in conformity with U.S. generally accepted accounting principles (“U.S. GAAP”) requires our management to make judgments, assumptions, and estimates that affect the amounts reported in the condensed consolidated financial statements and accompanying notes. Our more significant estimates and judgments that we believe are the most critical to aid in fully understanding and evaluating our reported financial results are revenue recognition; allowance for doubtful accounts; allowance for product warranty; valuation of stock options; valuation and impairment of goodwill, long-lived assets, and acquired intangible assets; useful lives for depreciation and amortization; valuation adjustments for excess and obsolete inventory; 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, 2014 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, 2014 included in our Annual Report on Form 10-K filed with the SEC on March 6, 2015. 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”) 2014-09, Revenue from Contracts with Customers. On July 9, 2015, the FASB voted to approve a one-year deferral of the effective date of ASU 2014-09. Based on the FASB’s decision, ASU 2014-09 will apply to us for annual reporting periods beginning after December 15, 2017, including interim reporting periods within annual reporting periods beginning after December 15, 2017. Additionally, the FASB decided to permit early adoption, but not before the original effective date (that is, annual periods beginning after December 15, 2016). The FASB expects to issue its final update formally amending the effective date by the end of the third quarter of 2015. In January 2015, the FASB issued ASU 2015-01, Income Statement – Extraordinary and Unusual Items. In April 2015, the FASB issued ASU 2015-03, Interest – Imputation of Interest. Also in April 2015, the FASB issued ASU 2015-05, Intangibles – Goodwill and Other- Internal-Use Software. In July 2015, the FASB issued ASU 2015-11, Inventory – Simplifying the Measurement of Inventory.

Note 2 - Goodwill and Other I21

Note 2 - Goodwill and Other Intangible Assets (Tables)	6 Months Ended
	Jun. 30, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Finite-Lived Intangible Assets [Table Text Block]	June 30, 2015 Gross Carrying Amount Accumulated Amortization Accumulated Impairment Losses Net Carrying Amount Developed technology $ 6,100 $ (3,405 ) $ — $ 2,695 Non-compete agreements 1,310 (1,310 ) — — Backlog 1,300 (1,300 ) — — Trademarks 1,200 (180 ) (1,020 ) — Customer relationships 990 (990 ) — — Patents 585 (389 ) (42 ) 154 Total $ 11,485 $ (7,574 ) $ (1,062 ) $ 2,849 December 31, 2014 Gross Carrying Amount Accumulated Amortization Accumulated Impairment Losses Net Carrying Amount Developed technology $ 6,100 $ (3,101 ) $ — $ 2,999 Non-compete agreements 1,310 (1,310 ) — — Backlog 1,300 (1,300 ) — — Trademarks 1,200 (180 ) (1,020 ) — Customer relationships 990 (990 ) — — Patents 585 (376 ) (42 ) 167 Total $ 11,485 $ (7,257 ) $ (1,062 ) $ 3,166

Note 3 - Loss per Share (Tables

Note 3 - Loss per Share (Tables)	6 Months Ended
	Jun. 30, 2015
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	Three Months Ended June 30, Six Months Ended June 30, 2015 2014 2015 2014 Numerator: Net loss $ (3,327 ) $ (4,611 ) $ (11,610 ) $ (8,294 ) Denominator: Basic and diluted weighted average common shares outstanding 52,026 51,566 51,987 51,506 Basic and diluted net loss per share $ (0.06 ) $ (0.09 ) $ (0.22 ) $ (0.16 )
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]	Three and Six Months Ended June 30, 2015 2014 Stock options 8,267 7,573 Warrants 200 600

Note 4 - Other Financial Info23

Note 4 - Other Financial Information (Tables)	6 Months Ended
	Jun. 30, 2015
Disclosure Text Block Supplement [Abstract]
Schedule of Restricted Cash and Cash Equivalents [Table Text Block]	June 30, 2015 December 31, 2014 Collateral for stand-by letters of credit $ 1,347 $ 2,623 Current restricted cash $ 1,347 $ 2,623 Collateral for stand-by letters of credit $ 1,704 $ 2,850 Non-current restricted cash $ 1,704 $ 2,850 Total restricted cash $ 3,051 $ 5,473
Schedule of Inventory, Current [Table Text Block]	June 30, 2015 December 31, 2014 Raw materials $ 2,743 $ 2,903 Work in process 2,331 1,915 Finished goods 4,629 3,386 Inventories $ 9,703 $ 8,204
Schedule of Other Current Assets [Table Text Block]	June 30, 2015 December 31, 2014 Interest receivable $ 52 $ 112 Supplier advances 159 107 Other prepaid expenses and current assets 869 1,098 Total prepaid and other current assets $ 1,080 $ 1,317
Schedule of Accrued Liabilities [Table Text Block]	June 30, 2015 December 31, 2014 Accrued legal expenses $ 188 $ 1,734 Payroll and commissions payable 2,368 3,116 Other accrued expenses and current liabilities 2,330 3,577 Accrued expenses and other current liabilities $ 4,886 $ 8,427
Schedule of Other Assets and Other Liabilities [Table Text Block]	June 30, 2015 December 31, 2014 Deferred rent expense, non-current $ 796 $ 866 Accrued legal expenses, non-current 43 1,587 Accrued expenses and other current liabilities $ 839 $ 2,453
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]	Foreign Currency Translation Adjustments Net of Tax Benefit Unrealized Gains (Losses) on Investments Total Accumulated Other Comprehensive Loss Balance, December 31, 2014 $ (67 ) $ (6 ) $ (73 ) Net other comprehensive income 25 1 26 Balance, June 30, 2015 $ (42 ) $ (5 ) $ (47 )

Note 5 - Investments (Tables)

Note 5 - Investments (Tables)	6 Months Ended
	Jun. 30, 2015
Investments, Debt and Equity Securities [Abstract]
Available-for-sale Securities [Table Text Block]	June 30, 2015 Amortized Cost Gross Unrealized Holding Gains Gross Unrealized Holding Losses Fair Value Short-term investments: Corporate notes and bonds $ 4,717 $ — $ (4 ) $ 4,713 Total short-term investments $ 4,717 $ — $ (4 ) $ 4,713 Long-term investments: Corporate notes and bonds $ 263 $ — $ (1 ) $ 262 Total long-term investments $ 263 $ — $ (1 ) $ 262 Total available-for-sale securities $ 4,980 $ — $ (5 ) $ 4,975 December 31, 201 4 Amortized Cost Gross Unrealized Holding Gains Gross Unrealized Holding Losses Fair Value Short-term investments State and local government obligations $ 225 $ — $ — $ 225 Corporate notes and bonds 12,851 4 (8 ) 12,847 Total short-term investments $ 13,076 $ 4 $ (8 ) $ 13,072 Long-term investments Corporate notes and bonds 268 — (1 ) 267 Total long-term investments $ 268 $ — $ (1 ) $ 267 Total investments $ 13,344 $ 4 $ (9 ) $ 13,339
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Table Text Block]	June 30, 2015 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 $ 262 $ (1 ) $ 3,380 $ (4 ) $ 3,642 $ (5 ) Total $ 262 $ (1 ) $ 3,380 $ (4 ) $ 3,642 $ (5 ) December 31, 201 4 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 $ 5,085 $ (6 ) $ 1,205 $ (3 ) $ 6,290 $ (9 ) Total $ 5,085 $ (6 ) $ 1,205 $ (3 ) $ 6,290 $ (9 )
Investments Classified by Contractual Maturity Date [Table Text Block]	June 30, 2015 Amortized Cost Fair Value Due after one year through three years $ 4,980 $ 4,975 Total available-for-sale securities $ 4,980 $ 4,975

Note 6 - Long-Term Debt and L25

Note 6 - Long-Term Debt and Lines of Credit (Tables)	6 Months Ended
	Jun. 30, 2015
Debt Disclosure [Abstract]
Schedule of Long-term Debt Instruments [Table Text Block]	June 30, 2015 December 31, 2014 Loan payable $ 53 $ — Less: current portion (11 ) — Total long-term debt $ 42 $ —
Schedule of Maturities of Long-term Debt [Table Text Block]	June 30, 2015 2015 (remaining 6 months) $ 5 2016 11 2017 11 2018 11 2019 11 Thereafter 4 Total debt $ 53

Note 7 - Equity (Tables)

Note 7 - Equity (Tables)	6 Months Ended
	Jun. 30, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block]	Three Months Ended June 30, Six Months Ended June 30, 2015 2014 2015 2014 Cost of revenue $ 37 $ 26 $ 72 $ 48 General and administrative 1,679 365 2,576 694 Sales and marketing 106 155 207 308 Research and development 91 88 198 165 Total share-based compensation expense $ 1,913 $ 634 $ 3,053 $ 1,215

Note 9 - Commitments and Cont27

Note 9 - Commitments and Contingencies (Tables)	6 Months Ended
	Jun. 30, 2015
Commitments and Contingencies Disclosure [Abstract]
Operating Leases of Lessee Disclosure [Table Text Block]	June 30, 2015 2015 (remaining six months) $ 805 2016 1,576 2017 1,567 2018 1,591 2019 1,398 Total future minimum lease payments $ 6,937
Schedule of Product Warranty Liability [Table Text Block]	Three Months Ended June 30, Six Months Ended June 30, 2015 2014 2015 2014 Balance, beginning of period $ 756 $ 705 $ 755 $ 709 Warranty costs charged to cost of revenue (6 ) 50 15 53 Utilization of warranty (3 ) (50 ) (23 ) (57 ) Balance, end of period $ 747 $ 705 $ 747 $ 705

Note 10 - Business Segment an28

Note 10 - Business Segment and Geographic Information (Tables)	6 Months Ended
	Jun. 30, 2015
Segment Reporting [Abstract]
Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block]	Three Months Ended June 30, Six Months Ended June 30, 2015 2014 2015 2014 Domestic revenue $ 922 $ 235 $ 1,186 $ 584 International revenue 9,562 6,172 15,162 9,720 Total revenue $ 10,484 $ 6,407 $ 16,348 $ 10,304 Revenue by country: United Arab Emirates 35 % 2 % 23 % 3 % United States 9 4 7 6 Bahamas * 14 * 10 China 4 11 4 8 Israel 2 9 1 10 Others ** 50 60 65 63 Total 100 % 100 % 100 % 100 %

Note 11 - Concentrations (Table

Note 11 - Concentrations (Tables)	6 Months Ended
	Jun. 30, 2015
Accounts Receivable [Member]
Note 11 - Concentrations (Tables) [Line Items]
Schedules of Concentration of Risk, by Risk Factor [Table Text Block]	June 30, 2015 December 31, 2014 Customer A 31 % — Customer B 15 % — Customer C 10 % 32 % Customer D 8 % 11 %
Sales Revenue, Net [Member]
Note 11 - Concentrations (Tables) [Line Items]
Schedules of Concentration of Risk, by Risk Factor [Table Text Block]	Three Months Ended June 30, Six Months Ended June 30, 2015 2014 2015 2014 Customer A 30 % — 22 % — Customer B 9 % * 10 % 1 % Customer E 2 % 14 % 2 % 9 %

Note 12 - Fair Value Measurem30

Note 12 - Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2015
Fair Value Disclosures [Abstract]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]	June 30, 2015 Level 1 Level 2 Inputs Level 3 Inputs Assets: Short-term available-for-sale securities $ 4,713 $ — $ 4,713 $ — Long-term available-for-sale securities 262 — 262 — Total assets $ 4,975 $ — $ 4,975 $ — December 31, 2014 Level 1 Level 2 Inputs Level 3 Inputs Assets: Short-term available-for-sale securities $ 13,072 $ — $ 13,072 $ — Long-term available-for-sale securities 267 — 267 — Total assets $ 13,339 $ — $ 13,339 $ —

Note 1 - The Company and Summ31

Note 1 - The Company and Summary of Significant Accounting Policies (Details)	6 Months Ended
	Jun. 30, 2015
Accounting Policies [Abstract]
Number of Subsidiaries	5

Note 2 - Goodwill and Other I32

Note 2 - Goodwill and Other Intangible Assets (Details) - USD ($)	3 Months Ended	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2015	Dec. 31, 2014
Note 2 - Goodwill and Other Intangible Assets (Details) [Line Items]
Goodwill	$ 12,790,000	$ 12,790,000	$ 12,790,000
Goodwill, Period Increase (Decrease)	0	0
Goodwill, Impaired, Accumulated Impairment Loss	0	0
Finite-Lived Intangible Assets, Accumulated Impairment Losses	1,062,000	1,062,000	1,062,000
Trademarks from 2012 [Member]
Note 2 - Goodwill and Other Intangible Assets (Details) [Line Items]
Finite-Lived Intangible Assets, Accumulated Impairment Losses	1,000,000	1,000,000	1,000,000
Patents from 2007 [Member]
Note 2 - Goodwill and Other Intangible Assets (Details) [Line Items]
Finite-Lived Intangible Assets, Accumulated Impairment Losses	31,000	31,000	31,000
Patents from 2010 [Member]
Note 2 - Goodwill and Other Intangible Assets (Details) [Line Items]
Finite-Lived Intangible Assets, Accumulated Impairment Losses	$ 11,000	$ 11,000	$ 11,000

Note 2 - Goodwill and Other I33

Note 2 - Goodwill and Other Intangible Assets (Details) - Identifiable Intangible Assets - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 11,485	$ 11,485
Accumulated Amortization	(7,574)	(7,257)
Accumulated Impairment Losses	(1,062)	(1,062)
Net Carrying Amount	2,849	3,166
Developed Technology Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	6,100	6,100
Accumulated Amortization	(3,405)	(3,101)
Net Carrying Amount	2,695	2,999
Noncompete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,310	1,310
Accumulated Amortization	(1,310)	(1,310)
Order or Production Backlog [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,300	1,300
Accumulated Amortization	(1,300)	(1,300)
Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,200	1,200
Accumulated Amortization	(180)	(180)
Accumulated Impairment Losses	(1,020)	(1,020)
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	990	990
Accumulated Amortization	(990)	(990)
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	585	585
Accumulated Amortization	(389)	(376)
Accumulated Impairment Losses	(42)	(42)
Net Carrying Amount	$ 154	$ 167

Note 3 - Loss per Share (Detail

Note 3 - Loss per Share (Details) - Computation of Basic and Diluted Loss per Share - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Numerator:
Net loss	$ (3,327)	$ (4,611)	$ (11,610)	$ (8,294)
Denominator:
Basic and diluted weighted average common shares outstanding	52,026	51,566	51,987	51,506
Basic and diluted net loss per share	$ (0.06)	$ (0.09)	$ (0.22)	$ (0.16)

Note 3 - Loss per Share (Deta35

Note 3 - Loss per Share (Details) - Antidilutive Securities Excluded from Computation of Diluted Earnings per Share - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Employee Stock Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities	8,267	7,573	8,267	7,573
Warrant [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities	200	600	200	600

Note 4 - Other Financial Info36

Note 4 - Other Financial Information (Details)	3 Months Ended
	Jun. 30, 2015USD ($)
Note 4 - Other Financial Information (Details) [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	$ 0
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]
Note 4 - Other Financial Information (Details) [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	0
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Note 4 - Other Financial Information (Details) [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	$ 0

Note 4 - Other Financial Info37

Note 4 - Other Financial Information (Details) - Restricted Cash - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Restricted Cash and Cash Equivalents Items [Line Items]
Current restricted cash	$ 1,347	$ 2,623
Non-current restricted cash	1,704	2,850
Total restricted cash	3,051	5,473
Collateral for Stand-by Letters of Credit [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Current restricted cash	1,347	2,623
Non-current restricted cash	$ 1,704	$ 2,850

Note 4 - Other Financial Info38

Note 4 - Other Financial Information (Details) - Inventories - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Inventories [Abstract]
Raw materials	$ 2,743	$ 2,903
Work in process	2,331	1,915
Finished goods	4,629	3,386
Inventories	$ 9,703	$ 8,204

Note 4 - Other Financial Info39

Note 4 - Other Financial Information (Details) - Prepaid Expenses and Other Current Assets - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Prepaid Expenses and Other Current Assets [Abstract]
Interest receivable	$ 52	$ 112
Supplier advances	159	107
Other prepaid expenses and current assets	869	1,098
Total prepaid and other current assets	$ 1,080	$ 1,317

Note 4 - Other Financial Info40

Note 4 - Other Financial Information (Details) - Accrued Expenses and Other Current Liabilities - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Accrued Expenses and Other Current Liabilities [Abstract]
Accrued legal expenses	$ 188	$ 1,734
Payroll and commissions payable	2,368	3,116
Other accrued expenses and current liabilities	2,330	3,577
Accrued expenses and other current liabilities	$ 4,886	$ 8,427

Note 4 - Other Financial Info41

Note 4 - Other Financial Information (Details) - Other Non-current Liabilities - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Other Non-current Liabilities [Abstract]
Deferred rent expense, non-current	$ 796	$ 866
Accrued legal expenses, non-current	43	1,587
Accrued expenses and other current liabilities	$ 839	$ 2,453

Note 4 - Other Financial Info42

Note 4 - Other Financial Information (Details) - Accumulated Other Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Accumulated Other Comprehensive Loss [Abstract]
Balance - Foreign Currency Translation Adjustments Net of Tax Benefit			$ (67)
Balance - Unrealized Gains (Losses) on Investments			(6)
Balance - Total Accumulated Other Comprehensive Loss			(73)
Net other comprehensive income	$ (6)	$ 3	25	$ 46
Net other comprehensive income	(2)	$ 16	1	$ 18
Net other comprehensive income			26
Balance - Foreign Currency Translation Adjustments Net of Tax Benefit	(42)		(42)
Balance - Unrealized Gains (Losses) on Investments	(5)		(5)
Balance - Total Accumulated Other Comprehensive Loss	$ (47)		$ (47)

Note 5 - Investments (Details)

Note 5 - Investments (Details)	3 Months Ended
	Jun. 30, 2015USD ($)
Investments, Debt and Equity Securities [Abstract]
Proceeds from Sale of Available-for-sale Securities	$ 0

Note 5 - Investments (Details)

Note 5 - Investments (Details) - Available-for-Sale Securities - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Short-term investments:
Amortized Cost	$ 4,980	$ 13,344
Gross Unrealized Holding Gains		4
Gross Unrealized Holding Losses	(5)	(9)
Fair Value	4,975	13,339
Short-term Investments [Member]
Short-term investments:
Amortized Cost	4,717	13,076
Gross Unrealized Holding Gains		4
Gross Unrealized Holding Losses	(4)	(8)
Fair Value	4,713	13,072
Short-term Investments [Member] | Corporate Debt Securities [Member]
Short-term investments:
Amortized Cost	4,717	12,851
Gross Unrealized Holding Gains		4
Gross Unrealized Holding Losses	(4)	(8)
Fair Value	4,713	12,847
Short-term Investments [Member] | US States and Political Subdivisions Debt Securities [Member]
Short-term investments:
Amortized Cost		225
Fair Value		225
Other Long-term Investments [Member]
Short-term investments:
Amortized Cost	263	268
Gross Unrealized Holding Losses	(1)	(1)
Fair Value	262	267
Other Long-term Investments [Member] | Corporate Debt Securities [Member]
Short-term investments:
Amortized Cost	263	268
Gross Unrealized Holding Losses	(1)	(1)
Fair Value	$ 262	$ 267

Note 5 - Investments (Details45

Note 5 - Investments (Details) - Gross Unrealized Losses and Fair Values of Investments - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Note 5 - Investments (Details) - Gross Unrealized Losses and Fair Values of Investments [Line Items]
Fair Value, Less than 12 months	$ 262	$ 5,085
Gross Unrealized Losses , Less than 12 months	(1)	(6)
Fair Value, 12 months or greater	3,380	1,205
Gross Unrealized Losses , 12 months or greater	(4)	(3)
Fair value, Total	3,642	6,290
Gross Unrealized Losses , Total	(5)	(9)
Corporate Debt Securities [Member]
Note 5 - Investments (Details) - Gross Unrealized Losses and Fair Values of Investments [Line Items]
Fair Value, Less than 12 months	262	5,085
Gross Unrealized Losses , Less than 12 months	(1)	(6)
Fair Value, 12 months or greater	3,380	1,205
Gross Unrealized Losses , 12 months or greater	(4)	(3)
Fair value, Total	3,642	6,290
Gross Unrealized Losses , Total	$ (5)	$ (9)

Note 5 - Investments (Details46

Note 5 - Investments (Details) - Amortized Cost and Fair Value of Available-for-Sale Securities $ in Thousands	Jun. 30, 2015USD ($)
Amortized Cost and Fair Value of Available-for-Sale Securities [Abstract]
Due after one year through three years	$ 4,980
Due after one year through three years	4,975
Total available-for-sale securities	4,980
Total available-for-sale securities	$ 4,975

Note 6 - Long-Term Debt and L47

Note 6 - Long-Term Debt and Lines of Credit (Details) - USD ($)	1 Months Ended
	Jun. 30, 2012	Dec. 31, 2009	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	May. 31, 2012
Note 6 - Long-Term Debt and Lines of Credit (Details) [Line Items]
Long-term Debt			$ 53,000
Letters of Credit Outstanding, Amount			3,000,000
Restricted Cash and Cash Equivalents			3,051,000		$ 5,473,000
March 2015 Installment Loan [Member]
Note 6 - Long-Term Debt and Lines of Credit (Details) [Line Items]
Long-term Debt			53,000	$ 55,000
Debt Instrument, Interest Rate, Stated Percentage				6.35%
The 2012 Agreement [Member]
Note 6 - Long-Term Debt and Lines of Credit (Details) [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 16,000,000
Cash Collateral Balance Required by Credit Agreement	101.00%
Letters of Credit Outstanding, Amount			3,000,000		3,100,000
The 2012 Agreement [Member] | Collateral for Stand-by Letters of Credit [Member]
Note 6 - Long-Term Debt and Lines of Credit (Details) [Line Items]
Restricted Cash and Cash Equivalents			3,100,000		3,100,000
The 2012 Agreement [Member] | Revolving Credit Facility [Member]
Note 6 - Long-Term Debt and Lines of Credit (Details) [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 10,000,000
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	0.25%
Long-term Line of Credit			0		0
The 2012 Agreement [Member] | Revolving Credit Facility [Member] | Prime Rate [Member]
Note 6 - Long-Term Debt and Lines of Credit (Details) [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.00%
The 2012 Agreement [Member] | Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member]
Note 6 - Long-Term Debt and Lines of Credit (Details) [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.25%
The 2012 Agreement [Member] | Standby Letters of Credit [Member]
Note 6 - Long-Term Debt and Lines of Credit (Details) [Line Items]
Line of Credit Facility, Capacity Available for Trade Purchases	$ 16,000,000
The 2009 Agreement [Member]
Note 6 - Long-Term Debt and Lines of Credit (Details) [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 16,000,000
Cash Collateral Balance Required by Credit Agreement						105.00%
Letters of Credit Outstanding, Amount			0		2,300,000
Cash Collateral Balance, Percentage of Outstanding Standby Letters of Credit		101.00%
Cash Collateral Balance, Percentage of Outstanding Advances		100.00%
The 2009 Agreement [Member] | Collateral for Stand-by Letters of Credit [Member]
Note 6 - Long-Term Debt and Lines of Credit (Details) [Line Items]
Restricted Cash and Cash Equivalents			$ 0		$ 2,400,000
The 2009 Agreement [Member] | Revolving Credit Facility [Member]
Note 6 - Long-Term Debt and Lines of Credit (Details) [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 10,000,000
Debt Instrument, Basis Spread on Variable Rate		1.375%
Long-term Line of Credit						$ 0
The 2009 Agreement [Member] | Standby Letters of Credit [Member]
Note 6 - Long-Term Debt and Lines of Credit (Details) [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 15,900,000

Note 6 - Long-Term Debt and L48

Note 6 - Long-Term Debt and Lines of Credit (Details) - Long-Term Debt - USD ($)	Jun. 30, 2015	Mar. 31, 2015
Debt Instrument [Line Items]
Loan payable	$ 53,000
Less: current portion	(11,000)
Total long-term debt	42,000
March 2015 Installment Loan [Member]
Debt Instrument [Line Items]
Loan payable	53,000	$ 55,000
Less: current portion	(11,000)
Total long-term debt	$ 42,000

Note 6 - Long-Term Debt and L49

Note 6 - Long-Term Debt and Lines of Credit (Details) - Future Minimum Principal Payments Due Under Long-Term Debt Arrangements $ in Thousands	Jun. 30, 2015USD ($)
Future Minimum Principal Payments Due Under Long-Term Debt Arrangements [Abstract]
2015 (remaining 6 months)	$ 5
2,016	11
2,017	11
2,018	11
2,019	11
Thereafter	4
Total debt	$ 53

Note 7 - Equity (Details)

Note 7 - Equity (Details) - USD ($)	1 Months Ended				3 Months Ended		6 Months Ended
	Jun. 30, 2015	Apr. 30, 2015	Mar. 31, 2015	Feb. 28, 2015	Jun. 30, 2015	Mar. 31, 2015	Jun. 30, 2015
Note 7 - Equity (Details) [Line Items]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized (in Dollars)	$ 3,900,000				$ 3,900,000		$ 3,900,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition							2 years 281 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in Shares)	16,000
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in Dollars per share)	$ 2.60
Non-Employee Directors [Member]
Note 7 - Equity (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in Shares)	373,744			344,090
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in Dollars per share)	$ 2.92			$ 3.53
Certain Officers and Other Employees [Member]
Note 7 - Equity (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in Shares)			1,415,739
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in Dollars per share)			$ 2.75
Chief Executive Officer [Member]
Note 7 - Equity (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award Accelerated Compensation Cost (in Dollars)						$ 170,000
Share-based Compensation Arrangement by Share-based Payment Award, Vested Options Contnue to be Exercisable		90 days
Allocated Share-based Compensation Expense (in Dollars)					$ 1,100,000
Chief Marketing Officer [Member]
Note 7 - Equity (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Vested Options Contnue to be Exercisable					90 days
Allocated Share-based Compensation Expense (in Dollars)					$ 43,000
Share-based Compensation Arrangement by Share-based Payment Award, Continued Vesting of Granted Options, Period		6 months
Chief Financial Office and Vice President of Strategy [Member]
Note 7 - Equity (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in Shares)	300,000
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in Dollars per share)	$ 2.61
Employee Stock Option [Member]
Note 7 - Equity (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period	10 years
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	4 years
Employee Stock Option [Member] | Non-Employee Directors [Member]
Note 7 - Equity (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period	10 years			10 years
Employee Stock Option [Member] | Certain Officers and Other Employees [Member]
Note 7 - Equity (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period			10 years
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period			4 years
Employee Stock Option [Member] | Chief Financial Office and Vice President of Strategy [Member]
Note 7 - Equity (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period	10 years
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	4 years

Note 7 - Equity (Details) - Sha

Note 7 - Equity (Details) - Share-based Compensation Expense - Employees and Consultants [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Allocated Share-based Compensation	$ 1,913	$ 634	$ 3,053	$ 1,215
Cost of Sales [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Allocated Share-based Compensation	37	26	72	48
General and Administrative Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Allocated Share-based Compensation	1,679	365	2,576	694
Selling and Marketing Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Allocated Share-based Compensation	106	155	207	308
Research and Development Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Allocated Share-based Compensation	$ 91	$ 88	$ 198	$ 165

Note 8 - Income Taxes (Details)

Note 8 - Income Taxes (Details) - USD ($)	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Effective Income Tax Rate Reconciliation, Percent	(1.23%)	(1.50%)
Deferred Tax Assets, Valuation Allowance			$ 20,400,000
Deferred Income Tax Expense (Benefit)	$ 0
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	$ 0

Note 9 - Commitments and Cont53

Note 9 - Commitments and Contingencies (Details)	May. 08, 2015USD ($)	Oct. 03, 2014EUR (€)	Jun. 30, 2015USD ($)	May. 07, 2015USD ($)	Dec. 31, 2014USD ($)
Note 9 - Commitments and Contingencies (Details) [Line Items]
Unrecorded Unconditional Purchase Obligation			$ 1,600,000
Letters of Credit Outstanding, Amount			3,000,000
Restricted Cash Used to Collateralize Irrevocable Standby Letters of Credit			3,100,000
Morgan Technical Ceramics, Inc v. Energy Recovery, Inc [Member]
Note 9 - Commitments and Contingencies (Details) [Line Items]
Litigation Settlement, Amount	$ (1,700,000)
Estimated Litigation Liability				$ 1,900,000
Litigation Liability, Amount Released from Legal Reserve	$ 200,000
Indemnification Agreement [Member]
Note 9 - Commitments and Contingencies (Details) [Line Items]
Guarantor Obligations, Current Carrying Value			$ 0		$ 0
Salary and Bonus [Member] | Mr. Borja Sanchez-Blanco [Member]
Note 9 - Commitments and Contingencies (Details) [Line Items]
Loss Contingency, Damages Sought, Value (in Euro) | €		€ 567,000
Alleged Stock Option [Member] | Mr. Borja Sanchez-Blanco [Member]
Note 9 - Commitments and Contingencies (Details) [Line Items]
Loss Contingency, Damages Sought, Value (in Euro) | €		€ 630,000
Minimum [Member]
Note 9 - Commitments and Contingencies (Details) [Line Items]
Warranty and Product Performance Guarantees as Percentage of Total Sales Agreement			5.00%
Warranty and Product Performance Guarantees Period			24 months
Maximum [Member]
Note 9 - Commitments and Contingencies (Details) [Line Items]
Warranty and Product Performance Guarantees as Percentage of Total Sales Agreement			10.00%
Warranty and Product Performance Guarantees Period			65 months

Note 9 - Commitments and Cont54

Note 9 - Commitments and Contingencies (Details) - Operating Lease Obligations $ in Thousands	Jun. 30, 2015USD ($)
Operating Lease Obligations [Abstract]
2015 (remaining six months)	$ 805
2,016	1,576
2,017	1,567
2,018	1,591
2,019	1,398
Total future minimum lease payments	$ 6,937

Note 9 - Commitments and Cont55

Note 9 - Commitments and Contingencies (Details) - Product Warranty Liability - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Product Warranty Liability [Abstract]
Balance, beginning of period	$ 756	$ 705	$ 755	$ 709
Warranty costs charged to cost of revenue	(6)	50	15	53
Utilization of warranty	(3)	(50)	(23)	(57)
Balance, end of period	$ 747	$ 705	$ 747	$ 705

Note 10 - Business Segment an56

Note 10 - Business Segment and Geographic Information (Details)	6 Months Ended
	Jun. 30, 2015
Segment Reporting [Abstract]
Number of Reportable Segments	1

Note 10 - Business Segment an57

Note 10 - Business Segment and Geographic Information (Details) - Revenues by Geographic Area - USD ($) $ in Thousands		3 Months Ended			6 Months Ended
		Jun. 30, 2015		Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Note 10 - Business Segment and Geographic Information (Details) - Revenues by Geographic Area [Line Items]
Revenue (in Dollars)		$ 10,484		$ 6,407	$ 16,348	$ 10,304
Domestic [Member]
Note 10 - Business Segment and Geographic Information (Details) - Revenues by Geographic Area [Line Items]
Revenue (in Dollars)		922		235	1,186	584
International [Member]
Note 10 - Business Segment and Geographic Information (Details) - Revenues by Geographic Area [Line Items]
Revenue (in Dollars)		$ 9,562		$ 6,172	$ 15,162	$ 9,720
Sales Revenue, Net [Member] | Geographic Concentration Risk [Member]
Revenue by country:
Revenue by country		100.00%		100.00%	100.00%	100.00%
Sales Revenue, Net [Member] | Geographic Concentration Risk [Member] | UNITED ARAB EMIRATES
Revenue by country:
Revenue by country		35.00%		2.00%	23.00%	3.00%
Sales Revenue, Net [Member] | Geographic Concentration Risk [Member] | UNITED STATES
Revenue by country:
Revenue by country		9.00%		4.00%	7.00%	6.00%
Sales Revenue, Net [Member] | Geographic Concentration Risk [Member] | BAHAMAS
Revenue by country:
Revenue by country				14.00%		10.00%
Sales Revenue, Net [Member] | Geographic Concentration Risk [Member] | CHINA
Revenue by country:
Revenue by country		4.00%		11.00%	4.00%	8.00%
Sales Revenue, Net [Member] | Geographic Concentration Risk [Member] | ISRAEL
Revenue by country:
Revenue by country		2.00%	[1]	9.00%	1.00%	10.00%
Sales Revenue, Net [Member] | Geographic Concentration Risk [Member] | Others [Member]
Revenue by country:
Revenue by country	[2]	50.00%		60.00%	65.00%	63.00%
[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) - Accounts Receivable Concentrations - Accounts Receivable [Member] - Customer Concentration Risk [Member]	6 Months Ended	12 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Customer A [Member]
Concentration Risk [Line Items]
Percentage of accounts receivable	31.00%
Customer B [Member]
Concentration Risk [Line Items]
Percentage of accounts receivable	15.00%
Customer C [Member]
Concentration Risk [Line Items]
Percentage of accounts receivable	10.00%	32.00%
Customer D [Member]
Concentration Risk [Line Items]
Percentage of accounts receivable	8.00%	11.00%

Note 11 - Concentrations (Det59

Note 11 - Concentrations (Details) - Revenue Concentrations - Sales Revenue, Net [Member] - Customer Concentration Risk [Member]	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Customer A [Member]
Concentration Risk [Line Items]
Percentage of revenue	30.00%		22.00%
Customer B [Member]
Concentration Risk [Line Items]
Percentage of revenue	9.00%		10.00%	1.00%
Customer E [Member]
Concentration Risk [Line Items]
Percentage of revenue	2.00%	14.00%	2.00%	9.00%
[1]	Less than 1%

Note 12 - Fair Value Measurem60

Note 12 - Fair Value Measurements (Details) - Fair Value of Financial Assets and Liabilities Measured on a Recurring Basis - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Assets:
Available-for-sale securities	$ 4,975	$ 13,339
Fair Value, Measurements, Recurring [Member]
Assets:
Available-for-sale securities	4,975	13,339
Short-term Investments [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Available-for-sale securities	4,713	13,072
Other Long-term Investments [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Available-for-sale securities	262	267
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Available-for-sale securities	4,975	13,339
Fair Value, Inputs, Level 2 [Member] | Short-term Investments [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Available-for-sale securities	4,713	13,072
Fair Value, Inputs, Level 2 [Member] | Other Long-term Investments [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Available-for-sale securities	$ 262	$ 267

Note 13 - Subsequent Events (De

Note 13 - Subsequent Events (Details) - Jul. 01, 2015 - Subsequent Event [Member] - USD ($)	Total
Note 13 - Subsequent Events (Details) [Line Items]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	200,000
Class of Warrant or Right, Exercise Price of Warrants or Rights	$ 1
Proceeds from Warrant Exercises	$ 200,000