Allot (ALLT) 20-F 22 Mar 18 2017 FY Annual report (foreign) Financial data

Document and Entity Information

Document and Entity Information	12 Months Ended
	Dec. 31, 2017shares
Document and Entity Information [Abstract]
Document Type	20-F
Amendment Flag	false
Document Period End Date	Dec. 31, 2017
Entity Registrant Name	Allot Communications Ltd.
Entity Central Index Key	1,365,767
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2,017
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding	33,483,262
Entity Current Reporting Status	Yes
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
CURRENT ASSETS:
Cash and cash equivalents	$ 15,342	$ 23,326
Restricted deposit	428
Short-term bank deposits	31,043	29,821
Available-for-sale marketable securities	63,194	60,507
Trade receivables (net of allowance for doubtful accounts of $1,292 and $924 at December 31, 2017 and 2016, respectively)	22,737	24,158
Other receivables and prepaid expenses	2,649	3,879
Inventories	7,897	7,235
Total current assets	143,290	148,926
NON-CURRENT ASSETS:
Severance pay fund	302	252
Deferred taxes	301	267
Other assets	1,135	1,136
Total non-current assets	1,738	1,655
PROPERTY AND EQUIPMENT, NET	5,002	4,387
INTANGIBLE ASSETS, NET	2,933	4,410
GOODWILL	31,562	31,562
Total assets	184,525	190,940
CURRENT LIABILITIES:
Trade payables	5,857	3,275
Employees and payroll accruals	8,535	7,381
Deferred revenues	11,370	11,133
Other payables and accrued expenses	5,742	3,157
Total current liabilities	31,504	24,946
LONG-TERM LIABILITIES:
Deferred revenues	3,878	3,597
Accrued severance pay	747	592
Other long-term liability	5,267	4,502
Total long-term liabilities	9,892	8,691
COMMITMENTS AND CONTINGENT LIABILITIES
SHAREHOLDERS' EQUITY:
Ordinary shares of NIS 0.1 par value - Authorized: 200,000,000 shares at December 31, 2017 and 2016; Issued: 34,299,262 and 33,873,719 shares at December 31, 2017 and 2016, respectively; Outstanding: 33,483,262 and 33,057,719 shares at December 31, 2017 and 2016, respectively	851	843
Additional paid-in capital	268,487	264,782
Treasury stock at cost - 816,000 shares at December 31, 2017 and 2016.	(3,998)	(3,998)
Accumulated other comprehensive income (loss)	36	(149)
Accumulated deficit	(122,247)	(104,175)
Total shareholders' equity	143,129	157,303
Total liabilities and shareholders' equity	$ 184,525	$ 190,940

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) $ in Thousands	Dec. 31, 2017USD ($)shares	Dec. 31, 2016USD ($)shares
Statement of Financial Position [Abstract]
Allowance for doubtful accounts | $	$ 1,292	$ 924
Ordinary shares, shares authorized	200,000,000	200,000,000
Ordinary shares, shares issued	34,299,262	33,873,719
Ordinary shares, shares outstanding	33,483,262	33,057,719
Treasury stock, shares	816,000	816,000

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Revenues:
Products	$ 48,727	$ 54,432	$ 62,642
Services	33,265	35,937	37,325
Total revenues	81,992	90,369	99,967
Cost of revenues:
Products	19,258	20,401	26,707
Services	9,272	7,494	6,720
Total cost of revenues	28,530	27,895	33,427
Gross profit	53,462	62,474	66,540
Operating expenses:
Research and development (net of grant participations of $ 392, $ 606 and $ 1,252 for the years ended December 31, 2017, 2016 and 2015, respectively)	21,852	24,221	26,422
Sales and marketing	38,316	35,290	43,318
General and administrative	10,696	9,812	12,702
Total operating expenses	70,864	69,323	82,442
Operating loss	(17,402)	(6,849)	(15,902)
Financial income (expenses), net	894	1,059	(584)
Loss before income tax expense	(16,508)	(5,790)	(16,486)
Income tax expense	1,564	2,204	3,356
Net loss	(18,072)	(7,994)	(19,842)
Unrealized gain (loss) on available-for-sale marketable securities	(35)	337	(261)
Unrealized gain (loss) on foreign currency cash flow hedges transactions	220	(16)	1,411
Total comprehensive loss	$ (17,887)	$ (7,673)	$ (18,692)
Net loss per share:
Basic and diluted	$ (0.54)	$ (0.24)	$ (0.59)
Weighted average number of shares used in per share computations of net loss:
Basic and diluted	33,253,158	33,202,309	33,419,917

CONSOLIDATED STATEMENTS OF COM5

CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Statement [Abstract]
Grants participations excluded from research and development costs	$ 392	$ 606	$ 1,252

STATEMENTS OF CHANGES IN SHAREH

STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($) $ in Thousands		Ordinary shares [Member]	Additional paid-in capital [Member]	Treasury Stock [Member]	Accumulated other comprehensive income (loss) [Member]	Accumulated deficit [Member]	Total
Balance at Dec. 31, 2014		$ 819	$ 252,120		$ (1,620)	$ (76,339)	$ 174,980
Balance, shares at Dec. 31, 2014		33,319,923					33,319,923
Exercise of stock options		$ 18	114				$ 132
Exercise of stock options, shares		263,179					103,267
Treasury stock acquired, net	[1]			(166)			$ (166)
Treasury stock acquired, net, shares	[1]	(25,000)					(25,000)
Stock-based compensation			7,151				$ 7,151
Other comprehensive income (loss)					1,150		1,150
Net loss						(19,842)	(19,842)
Balance at Dec. 31, 2015		$ 837	259,385	(166)	(470)	(96,181)	$ 163,405
Balance, shares at Dec. 31, 2015		33,558,102					33,558,102
Exercise of stock options		$ 6	236				$ 242
Exercise of stock options, shares		290,617					138,157
Treasury stock acquired, net	[1]			(3,832)			$ (3,832)
Treasury stock acquired, net, shares	[1]	(791,000)					(791,000)
Stock-based compensation			5,161				$ 5,161
Other comprehensive income (loss)					321		321
Net loss						(7,994)	(7,994)
Balance at Dec. 31, 2016		$ 843	264,782	(3,998)	(149)	(104,175)	$ 157,303
Balance, shares at Dec. 31, 2016		33,057,719					33,057,719
Exercise of stock options		$ 8	354				$ 362
Exercise of stock options, shares		425,543					99,517
Stock-based compensation			3,351				$ 3,351
Other comprehensive income (loss)					185		185
Net loss						(18,072)	(18,072)
Balance at Dec. 31, 2017		$ 851	$ 268,487	$ (3,998)	$ 36	$ (122,247)	$ 143,129
Balance, shares at Dec. 31, 2017		33,483,262					33,483,262
[1]	Including acquisition expenses of $ 5 and $ 35 for the years ended December 31, 2016 and 2015, respectively.

STATEMENTS OF CHANGES IN SHARE7

STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2017
Accumulated other comprehensive loss:
Accumulated unrealized loss on available-for-sale marketable securities	$ (88)	$ (425)	$ (123)
Accumulated unrealized loss on foreign currency cash flows hedge transactions	(61)	(45)	159
Accumulated other comprehensive loss	(149)	(470)	$ 36
Issuance costs for issuance of shares capital related to secondary offering	$ 5	$ 35

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash flows from operating activities:
Net loss	$ (18,072)	$ (7,994)	$ (19,842)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	3,668	4,043	5,708
Impairment of intangible assets			5,777
Stock-based compensation	3,366	5,141	7,170
Capital loss	27	24	328
Increase (decrease) in accrued severance pay, net	105	(29)	349
Decrease in other assets	1	1,576	1,205
Decrease in accrued interest and amortization of premium on marketable securities	913	1,238	967
Decrease (increase) in trade receivables	1,421	(284)	(847)
Decrease (increase) in other receivables and prepaid expenses	1,350	699	(2,623)
Decrease (increase) in inventories	(662)	2,934	(60)
Decrease (increase) in long-term deferred taxes, net	(34)	234	1,403
Increase (decrease) in trade payables	2,582	(3,832)	2,218
Increase (decrease) in employees and payroll accruals	1,140	(811)	901
Increase (decrease) in deferred revenues	518	(4,248)	1,961
Increase (decrease) in other payables and accrued expenses	3,449	(2,155)	(429)
Net cash provided by (used in) operating activities	(228)	(3,464)	4,186
Cash flows from investing activities:
Redemption of (Investment in) restricted deposits	(428)	203	(203)
Redemption of (Investment in) short-term deposits	(1,222)	12,879	16,300
Purchase of property and equipment	(2,833)	(1,582)	(2,223)
Investment in available-for sale marketable securities	(30,123)	(29,695)	(34,098)
Proceeds from redemption or sale of marketable securities	26,488	33,208	22,221
Proceeds from sale of property and equipment		26
Acquisition of Optenet, net of cash (see schedule A below)			(9,859)
Net cash (used in) provided by investing activities	(8,118)	15,039	(7,862)
Cash flows from financing activities:
Proceeds from exercise of stock options	362	113	132
Purchase of treasury stock, net		(3,832)	(166)
Net cash provided by (used in) financing activities	362	(3,719)	(34)
Increase (decrease) in cash and cash equivalents	(7,984)	7,856	(3,710)
Cash and cash equivalents at the beginning of the year	23,326	15,470	19,180
Cash and cash equivalents at the end of the year	15,342	23,326	15,470
Supplementary cash flow information:
Taxes	342	175	139
Estimated net fair value of assets acquired and liabilities assumed at the date of acquisition was as follows:
Working capital, net (excluding cash and cash equivalents)			(204)
Equipment and other assets			152
Intangible assets			7,242
Goodwill			10,748
Total consideration			17,938
Non cash consideration			(8,079)
Payment for acquisition, net of cash			$ 9,859

GENERAL

GENERAL	12 Months Ended
	Dec. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
GENERAL	NOTE 1:- GENERAL a. Allot Communications Ltd. (the "Company") was incorporated in November 1996 under the laws of the State of Israel. The Company is engaged in developing, selling and marketing network intelligence and security solutions for mobile, fixed and cloud service providers, as well as enterprises, and helping them enhance value to their customers. The Company’s flexible and highly scalable hardware platforms and software applications are deployed globally for network and application analytics, traffic control and shaping, and network-based security services including malware detection, Denial of Service (DDoS) attacks mitigation, and parental controls. The Company's main platforms include Allot Service Gateway service delivery platform, and Allot Secure. Allot SG enables network operators to learn about users and network behaviors to improve quality of service and reduce costs; and Allot Secure enables customers to detect security breaches and protect networks and network users from attacks. These platform and the solutions they provide empower service providers and enterprises to get more out of their networks, to secure and to manage them better, to clearly see and understand their networks from within, and to innovate, optimize, and capitalize on every opportunity, all the while deploying new services faster and constantly increasing value to their customers. The Company's Ordinary Shares are listed in the NASDAQ Global Select Market under the symbol "ALLT" from its initial public offering in November 2006. Since November, 2010, the Company's Ordinary Shares have been listed for trading in the Tel Aviv Stock Exchange as well. The Company holds twelve wholly-owned subsidiaries (the Company together with said subsidiaries shall collectively be referred to as "Allot"): Allot Communications, Inc. in Burlington, Massachusetts, United-States (the "U.S. subsidiary"), which was incorporated in 1997 under the laws of the State of California, Allot Communication Europe SARL in Sophia, France (the "European subsidiary"), which was incorporated in 1998 under the laws of France, Allot Communications Japan K.K. in Tokyo, Japan (the "Japanese subsidiary"), which was incorporated in 2004 under the laws of Japan, Allot Communication (UK) Limited (the "UK subsidiary"), which was incorporated in 2006 under the laws of England and Wales, Allot Communications (Asia Pacific) Pte. Ltd. ("the Singaporean subsidiary"), which was incorporated in 2006 under the laws of Singapore, Allot Communications (New Zealand) Limited. (the "NZ subsidiary"), which was incorporated in 2007 under the laws of New Zealand, Allot India Private Limited. (the "Indian subsidiary”), which was incorporated in 2012 under the laws of India and commenced its activity in 2013, Allot Communications Africa (PTY) Ltd. (the "African subsidiary”), which was incorporated in 2013 under the laws of South Africa, Allot Communications (Hong Kong) Limited (the "HK subsidiary”), which was incorporated in 2013 under the laws of Hong-Kong, Allot Communications Spain, S.L. Sociedad Unipersonal (the "Spanish subsidiary”), which was incorporated in 2015 under the laws of Spain, Allot Communications (Colombia) S.A.S (the "Colombian subsidiary”), which was incorporated in 2015 under the laws of Colombia and Allot MexSub (the "Mexican subsidiary"), which was incorporated in 2015 under the laws of Mexico. The U.S., Colombian and Indian subsidiaries are engaged in the sale, marketing and technical support services of the Company's products in the Americas, Colombia and India, respectively. The European, Japanese, NZ, UK, Singaporean, HK and African subsidiaries are engaged in marketing and technical support services of the Company's products in Europe, Japan, Oceania, UK, Asia and Africa, respectively. The Spanish and Mexican subsidiaries commenced operations in 2015 and are engaged in the marketing, technical support and development activities of one of the Company's product lines. b. Acquisition: On March 23, 2015 (the "Optenet acquisition date"), the Company entered into an asset purchase agreement (the "Optenet APA") with the shareholders of Optenet S.A. ("Optenet") a private, global IT security company that develops security solutions for internet service providers and enterprises. The total consideration for the acquisition was $ 17,938, which consisted of $ 9,859 paid in cash and primarily an additional contingent consideration estimated at fair value of $ 8,079 at the Optenet acquisition date. As of December 31, 2017 and 2016, the contingent consideration is estimated at fair value of $ 5,267 and $ 4,504, respectively. The change in fair value of the contingent consideration was recorded to general and administrative expenses. The contingent consideration is payable over a five year term ending March 23, 2020 based on achievement of certain thresholds of revenues derived from Optenet’s products and has payments cap of $27,500. The obligation in respect of the contingent consideration is presented under Other payables and accrued expenses and Other long-term liability. The acquisition was accounted for using the purchase method of accounting in accordance with ASC No. 805, “Business Combinations” ("ASC No. 805"). Accordingly, the purchase price was allocated according to the estimated fair values of the assets acquired and liabilities assumed and the excess of the purchase price over the net tangible and identified intangible assets was assigned to goodwill. The fair value of intangible assets was determined by management with the assistance of a third party valuation. The following table summarizes the estimated fair values of the assets acquired and liabilities assumed at the acquisition date: Fair value Current assets $ 54 Equipment 152 Deferred revenues (155 ) Current and non-current liabilities (103 ) Technology 4,032 Customer relationships 2,824 Backlog 386 Goodwill 10,748 Net assets acquired $ 17,938 Technology includes security solutions for internet service providers and enterprises such as encompass parental control, anti-malware and anti-spam products. The technology is amortized over the estimated useful life of 4.34 years using the straight line method. Backlog . Customer relationships The Company acquisition transaction costs amounted to $ 397. Unaudited pro forma condensed results of operations: The following represents the unaudited consolidated pro forma revenue and net loss for the years ended December 31, 2015, to give effect to the acquisition of Optenet as if it had occurred on January 1, 2015. The pro forma information is not necessarily indicative of the results of operations that would have been had the acquisition actually occurred on January 1, 2015, nor does it purport to represent the results of operations for future periods. Year ended December 31, 2015 Unaudited Revenues $ 100,683 Net loss $ (21,177 )

SIGNIFICANT ACCOUNTING POLICIES

SIGNIFICANT ACCOUNTING POLICIES	12 Months Ended
	Dec. 31, 2017
Accounting Policies [Abstract]
SIGNIFICANT ACCOUNTING POLICIES	NOTE 2:- SIGNIFICANT ACCOUNTING POLICIES The consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles ("U.S. GAAP"). a. Use of estimates: The preparation of the consolidated financial statements in conformity with U.S. GAAP requires management to make estimates, judgments and assumptions. The Company's management believes that the estimates, judgments and assumptions used are reasonable based upon information available at the time they are made. These estimates, judgments and assumptions can affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the dates of the financial statements, and the reported amounts of revenue and expenses during the reporting period. Actual results could differ from those estimates. b. Financial statements in U.S. dollars: The majority of the revenues of the Company and its subsidiaries are generated in U.S. dollars ("dollar") or linked to the dollar. In addition, a major portion of the Company's and certain of its subsidiaries' costs are incurred or determined in dollars. The Company's management believes that the dollar is the currency of the primary economic environment in which the Company and its subsidiaries operate. Thus, the functional and reporting currency of the Company and its subsidiaries is the dollar. Accordingly, monetary accounts maintained in currencies other than the dollar are remeasured into U.S. dollars in accordance with Accounting Standards Codification No. 830, "Foreign Currency Matters" ("ASC No. 830"). All transactions gains and losses from the remeasurement of monetary balance sheet items are reflected in the statements of operations as financial income or expenses as appropriate. c. Principles of consolidation: The consolidated financial statements include the accounts of the Company and its subsidiaries. Intercompany balances and transactions have been eliminated upon consolidation. d. Cash and cash equivalents: The Company considers all unrestricted highly liquid investments which are readily convertible into cash, with maturity of three months or less at the date of acquisition, to be cash equivalents. e. Restricted deposits: The restricted deposits are held in favor of financial institutions in respect of fulfillments of forward contract and operating obligations. f. Short-term bank deposits: Short-term bank deposits are deposits with maturities of more than three months but less than one year at the balance sheet date. The deposits are in dollars and bear interest at annual weighted average rate of 1.63% and 1.37% at December 31, 2017 and 2016, respectively. In connection with the Company's hedging transactions, the Company is required to maintain compensating deposits balances in the bank. Out of the short-term bank deposits, a total of $2,581 and $2,553, are due to the hedging transactions as of December 31, 2017 and 2016, respectively. g. Marketable securities: The Company accounts for investments in marketable securities in accordance with ASC 320, "Investments - Debt and Equity Securities". Management determines the appropriate classification of its investments in debt securities at the time of purchase and re-evaluates such determinations at each balance sheet date. Marketable securities classified as "available-for-sale" are carried at fair value, based on quoted market prices. Unrealized gains and losses are reported in a separate component of shareholders' equity in accumulated other comprehensive income (loss). Gains and losses are recognized when realized, on a specific identification basis, in the Company's consolidated statements of comprehensive loss. The Company's securities are reviewed for impairment in accordance with ASC 320-10-35. If such assets are considered to be impaired, the impairment charge is recognized in earnings when a decline in the fair value of its investments below the cost basis is judged to be Other-Than-Temporary Impairment (OTTI). Factors considered in making such a determination include the duration and severity of the impairment, the reason for the decline in value, the potential recovery period and the Company's intent to sell, including whether it is more likely than not that the Company will be required to sell the investment before recovery of cost basis. Based on the above factors, the Company concluded that unrealized losses on its available-for-sale securities, for the years ended 2017, 2016 and 2015, were not OTTI. h. Inventories: Inventories are stated at the lower of cost or net realizable Inventory write-off provision as of December 31, 2017 and 2016 amounted to $ 2,756 and $ 1,957, respectively. Cost is determined using the weighted average cost method. i. Property and equipment, net: Property and equipment are stated at cost, net of accumulated depreciation. Depreciation is calculated by the straight-line method over the estimated useful lives of the assets at the following annual rates: % Lab equipment 16 - 25 Computers and peripheral equipment 33 Office furniture 6 Leasehold improvements Over the shorter of the term of the lease or the useful life of the asset j. Goodwill impairment: Goodwill represents the excess of the purchase price over the fair value of net assets of purchased businesses. Under Accounting Standards Codification No. 350, "Intangibles-Goodwill and Other" ("ASC No. 350"), goodwill is not amortized, but rather subject to an annual impairment test, or more often if there are indicators of impairment present. In accordance with ASC No. 350 the Company performs an annual impairment test at December 31 each year. ASC 350 allows an entity to first assess qualitative factors to determine whether it is necessary to perform the two-step quantitative goodwill impairment test. If the qualitative assessment does not result in a more likely than not indication of impairment, no further impairment testing is required. If it does result in a more likely than not indication of impairment, the two-step impairment test is performed. Alternatively, ASC 350 permits an entity to bypass the qualitative assessment for any reporting unit and proceed directly to performing the first step of the goodwill impairment test. The first step, identifying a potential impairment, compares the fair value of the reporting unit with its carrying amount. If the carrying amount exceeds its fair value, the second step would need to be performed; otherwise, no further step is required. The second step, measuring the impairment loss, compares the implied fair value of the goodwill with the carrying amount of the goodwill. Any excess of the goodwill carrying amount over the applied fair value is recognized as an impairment loss, and the carrying value of goodwill is written down to fair value. The Company operates in one operating segment, and this segment comprises its only reporting unit. k. Impairment of long lived assets and intangible assets subject to amortization: Property and equipment and intangible assets subject to amortization are reviewed for impairment in accordance with ASC No. 360, "Accounting for the Impairment or Disposal of Long-Lived Assets," whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of an asset to the future undiscounted cash flows expected to be generated by the assets. If such assets are considered to be impaired, the impairment to be recognized is measured by the amount by which the carrying amount of the assets exceeds the fair value of the assets. Intangible assets acquired in a business combination are recorded at fair value at the date of acquisition. Following initial recognition, intangible assets are carried at cost less any accumulated amortization and any accumulated impairment losses. The useful lives of intangible assets are assessed to be either finite or indefinite. Intangible assets that are not considered to have an indefinite useful life are amortized over their estimated useful lives. Some of the acquired intangible assets are amortized over their estimated useful lives in proportion to the economic benefits realized. This accounting policy results in accelerated amortization of such customer relationships as compared to the straight-line method. All other intangible assets are amortized over their estimated useful lives on a straight-line basis. During the years ended December 31, 2017 and 2016, no impairment losses were recorded. During 2015, the Company recorded impairment loss (see Note 9). l. Revenue recognition: The Company generates revenues mainly from selling its products along with related maintenance and support services. At times, these arrangements may also include professional services, such as installation services or training. The Company generally sells its products through resellers, distributors, OEMs and system integrators, all of whom are considered end-users. Revenues from product sales are recognized when persuasive evidence of an agreement exists, title and risk of loss have transferred, no significant performance obligations remain, product payment is not contingent upon performance of installation or service obligations, the fee is fixed or determinable and collectability is probable. In instances where acceptance of the product or service is specified by the customer, revenue recognition is deferred until all acceptance criteria have been met. Maintenance and support related revenues included in multiple element arrangements are deferred and recognized on a straight-line basis over the term of the applicable maintenance and support agreement. Other services are recognized upon the completion of installation or when the service is provided. In instances where the services provided in a multiple element arrangement are considered essential to the functionality of the product and payment of the product is contingent upon performance of the services, the sales of the products and services would be considered one unit of accounting. Pursuant to the guidance of ASU 2009-13, "Multiple-Deliverable Revenue Arrangements, (amendments to ASC Topic 605, Revenue Recognition)" (ASU 2009-13) and ASU 2009-14, when a sales arrangement contains multiple elements, such as products and services, the Company allocates revenues to each element based on a selling price hierarchy. The selling price for a deliverable is based on VSOE if available, third party evidence ("TPE") if VSOE is not available, or best estimate of BESP Revenue arrangements with multiple deliverables are allocated using the relative selling price method. The Company determines the estimated selling price in multiple elements arrangements as follows: The Company determines the BESP The Company determines the selling price for maintenance and support based on VSOE of the price charged based on standalone sales (renewals) of such elements using a consistent percentage of the Company's product price lists. Deferred revenue includes amounts received from customers for which revenue has not yet been recognized. . The Company records a provision for estimated product returns based on its experience with historical product returns and other known factors. Such provisions amounted to $ 686 and $ 910 as of December 31, 2017 and 2016, respectively. m. Advertising expenses: Advertising expenses are charged to the statement of comprehensive loss, as incurred. Advertising expenses for the years ended December 31, 2017, 2016 and 2015 amounted to $ 1,236, $ 1,081 and $ 1,201, respectively. n. Research and development costs: Accounting Standards Codification No. 985-20, requires capitalization of certain software development costs subsequent to the establishment of technological feasibility. Based on the Company's product development process, technological feasibility is established upon the completion of a working model. The Company does not incur material costs between the completion of a working model and the point at which the products are ready for general release. Therefore, research and development costs are charged to the consolidated statement of comprehensive loss as incurred. o. Severance pay: The liability in Israel for substantially all of the Company`s employees in respect of severance pay liability is calculated in accordance with Section 14 of the Severance Pay Law -1963 (herein- "Section 14"). Section 14 states that Company's contributions for severance pay shall be in line of severance compensation and upon release of the policy to the employee, no additional obligations shall be conducted between the parties regarding the matter of severance pay and no additional payments shall be made by the Company to the employee. Furthermore, the related obligation and amounts deposited on behalf of such obligation under Section 14, are not stated on the balance sheet, because pursuant to current ruling, they are legally released from obligation to employees once the deposits have been paid. There are a limited number of employees in Israel, for whom the Company is liable for severance pay. The Company's liability for severance pay for its Israeli employees was calculated pursuant to Section 14, based on the most recent monthly salary of its Israeli employees multiplied by the number of years of employment as of the balance sheet date for such employees. The Company's liability was partly provided by monthly deposits with severance pay funds and insurance policies and the remainder by an accrual. Severance expense for the years ended December 31, 2017, 2016 and 2015, amounted to $ 1,801, $ 1,976 and $ 2,286, respectively. p. Accounting for stock-based compensation: The Company accounts for stock based compensation in accordance with Accounting Standards Codification No. 718, "Compensation - Stock Compensation" ("ASC No. 718") that requires companies to estimate the fair value of equity-based payment awards on the date of grant using an option-pricing model. The value of the portion of the award that is ultimately expected to vest is recognized as an expense over the requisite service periods in the Company's consolidated statement of comprehensive loss. The Company recognizes compensation expenses for the value of its awards based on the straight line method over the requisite service period of each of the awards, net of estimated forfeitures. The Company accounted for changes in award terms as a modification in accordance with ASC 718. A modification to the terms of an award should be treated as an exchange of the original award for a new award with total compensation cost equal to the grant-date fair value of the original award plus the incremental value measured at the same date. Under ASC 718, the calculation of the incremental value is based on the excess of the fair value of the new (modified) award based on current circumstances over the fair value of the original award measured immediately before its terms are modified based on current circumstances. The Company estimated the forfeiture rate based on historical forfeitures of equity awards and adjusted the rate to reflect changes in facts and circumstances, if any. The Company adopted ASU 2016-09 in the first quarter of fiscal year 2017, and elected to retain its existing accounting policy and estimate expected forfeitures. The adoption of this ASU did not have a material impact on the Company's. The following table sets forth the total stock-based compensation expense resulting from stock options and restricted share units ("RSUs") Year ended December 31, 2017 2016 2015 Cost of revenues $ 362 $ 367 $ 324 Research and development 648 1,240 1,637 Sales and marketing 1,166 1,833 2,802 General and administrative 1,190 1,701 2,407 Total stock-based compensation expense $ 3,366 $ 5,141 $ 7,170 The Company selected the binomial option pricing model as the most appropriate fair value method for its stock-based compensation awards with the following assumptions for the years ended December 31, 2017, 2016 and 2015: Year ended December 31, 2017 2016 2015 Suboptimal exercise multiple 2.9-3.5 2.9-3.5 3 Risk free interest rate 0.80%-2.20 % 0.47%-1.58 % 0.23%-2.35 % Volatility 27%-49 % 33%-51 % 37%-55 % Dividend yield 0 % 0 % 0 % The expected annual post-vesting and pre-vesting forfeiture rates affects the number of exercisable options. Based on the Company's historical experience, the annual pre-vesting and post-vesting are in the range of 0%-34% and 0%-29%, respectively, in the years 2017, 2016, and 2015. The computations of expected volatility and suboptimal exercise multiple is based on the average of the Company's realized historical stock price. The computation of the suboptimal exercise multiple and the forfeiture rates are based on the grantees expected exercise prior and post vesting termination behavior. The interest rate for period within the contractual life of the award is based on the U.S. Treasury Bills yield curve in effect at the time of grant. The Company currently has no plans to distribute dividends and intends to retain future earnings to finance the development of its business. The expected life of the stock options represents the weighted-average period the stock options are expected to remain outstanding and is a derived output of the binomial model. The expected life of the stock options is impacted by all of the underlying assumptions used in the Company's model. q. Treasury stock: The Company repurchases its Ordinary shares from time to time on the open market and holds such shares as treasury stock. The Company presents the cost to repurchase treasury stock as a reduction of shareholders' equity. r. Concentration of credit risks: Financial instruments that potentially subject the Company to concentrations of credit risk consist primarily of cash and cash equivalents, marketable securities, short-term bank deposits, trade receivables and derivative instruments. The majority of cash and cash equivalents and short-term deposits of the Company are invested in dollar deposits in major U.S. and Israeli banks. Such investments in the United States may be in excess of insured limits and are not insured in other jurisdictions. Generally, the cash and cash equivalents and short-term bank deposits may be redeemed upon demand, and therefore, bear minimal risk. Marketable securities include investments in dollar linked corporate and municipal bonds. Marketable securities consist of highly liquid debt instruments with high credit standing. The Company’s investment policy, approved by the Board of Directors, limits the amount the Group may invest in any one type of investment or issuer, thereby reducing credit risk concentrations. Management believes that the portfolio is well diversified and, accordingly, minimal credit risk exists with respect to these marketable debt securities The Company's trade receivables are primarily derived from sales to customers located mainly in EMEA, as well as in APAC, Latin America and the United States. Concentration of credit risk with respect to trade receivables is limited by credit limits, ongoing credit evaluation and account monitoring procedures. The Company performs ongoing credit evaluations of its customers and establishes an allowance for doubtful accounts on a specific basis. Allowance for doubtful accounts amounted to $ 1,292 and $ 924 as of December 31, 2017 and 2016, respectively. The Company utilizes foreign currency forward contracts to protect against the risk of overall changes in exchange rates. The derivative instruments hedge a portion of the Company's non-dollar currency exposure. Counterparties to the Company’s derivative instruments are all major financial institutions and its exposure is limited to the amount of any asset resulting from the forward contracts. The Company has no significant off balance sheet concentrations of credit risk. s. Grants from the Israel Innovation Authority: Participation grants from the Israel Innovation Authority (Previously known as the Office of the Chief Scientist) for research and development activity are recognized at the time the Company is entitled to such grants on the basis of the costs incurred and included as a deduction of research and development costs. Research and development non royalty bearing grants recognized amounted to $ 392, $ 606 and $ 1,252 in 2017, 2016 and 2015, respectively. t. Income taxes: The Company accounts for income taxes in accordance with Accounting Standards Codification No. 740, "Income Taxes" ("ASC No. 740"). ASC No. 740 prescribes the use of the liability method, whereby deferred tax asset and liability account balances are determined based on differences between financial reporting and tax bases of assets and liabilities and are measured using the enacted tax rates and laws that will be in effect when the differences are expected to reverse. The Company provides a valuation allowance, if necessary, to reduce deferred tax assets to their estimated realizable value if it is more likely than not that some portion or all of the deferred tax assets will not be realized. The deferred tax assets and liabilities are classified to non-current assets and liabilities, respectively. ASC No. 740 contains a two-step approach to recognizing and measuring a liability for uncertain tax positions. The first step is to evaluate the tax position taken or expected to be taken in a tax return by determining if the weight of available evidence indicates that it is more likely than not that, on an evaluation of the technical merits, the tax position will be sustained on audit, including resolution of any related appeals or litigation processes. The second step is to measure the tax benefit as the largest amount that is more than 50% likely to be realized upon ultimate settlement. u. Basic and diluted net income (loss) per share: Basic net income (loss) per share is computed based on the weighted average number of Ordinary Shares outstanding during each year. Diluted net income (loss) per share is computed based on the weighted average number of Ordinary Shares outstanding during each year, plus dilutive potential Ordinary Shares considered outstanding during the year, in accordance with FASB ASC 260 "Earnings Per Share". For the years ended December 31, 2017, 2016 and 2015, all outstanding options and have been excluded from the calculation of the diluted net loss per share since their effect was anti-dilutive. v. Comprehensive loss: The Company accounts for comprehensive loss in accordance with Accounting Standards Codification No. 220, "Comprehensive Income" ("ASC No. 220"). This statement establishes standards for the reporting and display of comprehensive loss and its components in a full set of general purpose financial statements. Comprehensive loss represents all changes in shareholders' equity during the period except those resulting from investments by, or distributions to shareholders. The Company determined that its items of comprehensive loss relate to unrealized gains and losses on hedging derivative instruments and unrealized gains and losses on available-for-sale marketable securities. The following table shows the components and the effects on net loss of amounts reclassified from accumulated other comprehensive loss as of December 31, 2017: Year ended December 31, 2017 Unrealized losses on marketable securities Unrealized gains (losses) on cash flow hedges Total Balance as of December 31, 2016 $ (88 ) $ (61 ) $ (149 ) Changes in other comprehensive income (loss) before reclassifications (28 ) 1,016 988 Amounts reclassified from accumulated other comprehensive income (loss) to : Cost of revenues - (83 ) (83 ) Operating expenses - (713 ) (713 ) Financial income, net (7 ) - (7 ) Net current-period other comprehensive income (loss) (35 ) 220 185 Balance as of December 31, 2017 $ (123 ) $ 159 $ 36 w. Fair value of financial instruments: The Company measures its cash and cash equivalents, marketable securities, derivative instruments, short-term bank deposits, trade receivables, other receivables, trade payables and other payables at fair value. The carrying amounts of short-term bank deposits, trade receivables, other receivables, trade payables and other payables approximate their fair value due to the short-term maturities of such instruments. Fair value is an exit price, representing the amount that would be received if the Company were to sell an asset or paid to transfer a liability in an orderly transaction between market participants. As such, fair value is a market-based measurement that should be determined based on assumptions that market participants would use in pricing an asset or a liability. The Company uses a three-tier value hierarchy, which prioritizes the inputs used in the valuation methodologies in measuring fair value: Level 1 - Observable inputs that reflect quoted prices (unadjusted) for identical assets or liabilities in active markets. Level 2 - Include other inputs that are directly or indirectly observable in the marketplace, other than quoted prices included in Level 1, such as quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets with insufficient volume or infrequent transactions, or other inputs that are observable (model-derived valuations in which significant inputs are observable), or can be derived principally from or corroborated by observable market data; and Level 3 - Unobservable inputs which are supported by little or no market activity. The Company categorized each of its fair value measurements in one of those three levels of hierarchy. The fair value hierarchy also requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The Company's earn-out consideration is classified within Level 3. The valuation methodology used by the Company to calculate the fair value consideration is the discounted cash flow using Monte-Carlo simulation method by taking into account, forecast future revenues, expected volatility of 41.1% and weighted average cost of debt of 2%. x. Derivatives and hedging: The Company accounts for derivatives and hedging based on Accounting Standards Codification No. 815, "Derivatives and Hedging" ("ASC No. 815"). The Company accounts for its derivative instruments as either assets or liabilities and carries them at fair value. Derivative instruments that are not designated and qualified as hedging instruments must be adjusted to fair value through earnings. For derivative instruments that hedge the exposure to variability in expected future cash flows that are designated as cash flow hedges, the effective portion of the gain or loss on the derivative instrument is reported as a component of accumulated other comprehensive income (loss) in shareholders' equity and reclassified into earnings in the same period or periods during which the hedged transaction affects earnings. The ineffective portion of the gain or loss on the derivative instrument is recognized in current earnings. To apply hedge accounting treatment, cash flow hedges must be highly effective in offsetting changes to expected future cash flows on hedged transactions. y. Business combinations: The Company accounts for business combinations in accordance with ASC No. 805. ASC No. 805 requires recognition of assets acquired, liabilities assumed, and any non-controlling interest at the acquisition date, measured at their fair values as of that date. Any excess of the fair value of net assets acquired over the purchase price is recorded as goodwill and any subsequent changes in estimated contingencies are to be recorded in earnings. In addition, changes in valuation allowance related to acquired deferred tax assets and acquired income tax positions are to be recognized in earnings. z. Warranty costs: The Company generally provides three months software and a one year hardware warranty for all of its products. A provision is recorded for estimated warranty costs at the time revenues are recognized based on the Company's experience. Warranty expenses for the years aa. Recently Issued Accounting Pronouncements: In January 2016, the FASB issued a new standard to amend certain aspects of recognition, measurement, presentation, and disclosure of financial instruments. Most prominent among the amendments is the requirement for changes in the fair value of our equity investments, with certain exceptions, to be recognized through net income rather than accumulated other comprehensive income (loss). ASU 2016-01 is effective for annual reporting periods, and interim periods within those years beginning after December 15, 2017. This new guidance doesn’t have a material impact on the Company’s Consolidated Financial Statements. In February 2016, the FASB issued ASU 2016-02, “Leases”, on the recognition, measurement, presentation and disclosure of leases for both parties to a contract (i.e., lessees and lessors). The new standard requires lessees to apply a dual approach, classifying leases as either finance or operating leases based on the principle of whether or not the lease is effectively a financed purchase by the lessee. This classification will determine whether lease expense is recognized based on an effective interest method or on a straight line basis over the term of the lease, respectively. A lessee is also required to record a right-of-use asset and a lease liability for all leases with a term of greater than 12 months regardless of their classification. Leases with a term of 12 months or less will be accounted for in a manner similar to the accounting under existing guidance for operating leases today. The new standard requires lessors to account for leases using an approach that is substantially equivalent to existing guidance for sales-type leases, direct financing leases and operating leases. ASC 842 supersedes the previous leases standard, ASC 840, "Leases". The guidance is effective for the interim and annual periods beginning on or after December 15, 2018, and early adoption is permitted. The Company is currently in the process of evaluating the impact of the adoption of ASU 2016-02 on its consolidated financial statements. In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments” (“ASU 2016-13”). The standard changes the methodology for measuring credit losses on financial instruments and the timing of when such losses are recorded. ASU 2016-13 is effective for fiscal years, and interim periods within those years, beginning after December 15, 2019. Early adoption is permitted for fiscal years, and interim periods within those years, beginning after December 15, 2018. The Company is currently evaluating the impact of this standard on its Consolidated Financial Statements. In November 2016, the FASB issued Accounting Standards Update No. 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash (ASU 2016-18), which requires companies to include amounts generally described as restricted cash and restricted cash equivalents in cash and cash equivalents when reconciling beginning-of-period and end-of-period total amounts shown on the statement of cash flows. The amendments in this Update are effective for public business entities for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. Early adoption is permitted, including adoption in an interim period. This new guidance doesn't have a material impact on the Company’s Consolidated Financial Statements. In January 2017, the FASB issued ASU 2017-04, “Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment" ("ASU 2017-04"). ASU 2017-04 eliminates the requirement to measure the implied fair value of goodwill by assigning the fair value of a reporting unit to all assets and liabilities within that unit (the "Step 2 test") from the goodwill impairment test. Instead, if the carrying amount of a reporting unit exceeds its fair value, an impairment loss is recognized in an amount equal to that excess, limited by the amount of goodwill in that reporting unit. ASU 2017-04 will become effective for the Company beginning January 1, 2020 and must be applied to any annual or interim goodwill impairment assessments after that date. Early adoption is permitted. The Company is currently evaluating the effect that the adoption of ASU 2017-04 will have on its consolidated financial statements. In May 2017, the FAS

AVAILABLE-FOR-SALE MARKETABLE S

AVAILABLE-FOR-SALE MARKETABLE SECURITIES	12 Months Ended
	Dec. 31, 2017
Investments, Debt and Equity Securities [Abstract]
AVAILABLE-FOR-SALE MARKETABLE SECURITIES	NOTE 3:- AVAILABLE-FOR-SALE MARKETABLE SECURITIES The following is a summary of available-for-sale marketable securities: December 31, 2017 December 31, 2016 Amortized cost Gross unrealized gain Gross unrealized Fair value Amortized cost Gross unrealized Gross unrealized Fair value Available-for-sale - matures within one year: Governmental debentures $ 573 $ 20 $ (1 ) $ 592 $ 339 $ - $ - $ 339 Corporate debentures 24,619 8 (22 ) 24,605 19,693 31 (14 ) 19,710 25,192 28 (23 ) 25,197 20,032 31 (14 ) 20,049 Available-for-sale - matures after one year through three years: Governmental debentures 108 - (1 ) 107 - - - - Corporate debentures 37,812 64 (187 ) 37,689 34,472 70 (78 ) 34,464 37,920 64 (188 ) 37,796 34,472 70 (78 ) 34,464 Available-for-sale - matures after three years through five years: Governmental debentures - - - - 100 - - 100 Corporate debentures 205 - (4 ) 201 5,991 2 (99 ) 5,894 205 - (4 ) 201 6,091 2 (99 ) 5,994 $ 63,317 $ 92 $ (215 ) $ 63,194 $ 60,595 $ 103 $ (191 ) $ 60,507 As of December 31, 2017, the company had no investments with a significant unrealized losses for more than 12 months.

FAIR VALUE MEASUREMENTS

FAIR VALUE MEASUREMENTS	12 Months Ended
	Dec. 31, 2017
Fair Value Disclosures [Abstract]
FAIR VALUE MEASUREMENTS	NOTE 4:- FAIR VALUE MEASUREMENTS In accordance with ASC No. 820, the Company measures its marketable securities and foreign currency derivative instruments at fair value. Cash equivalents and available for sale marketable securities are classified within Level 1 or Level 2. This is because these assets are valued using quoted market prices or alternative pricing sources and models utilizing market observable inputs. The earn-out liability related to the acquisition of Optenet is classified within Level 3 because this liability is based on present value calculations and an external valuation model whose inputs include market interest rates, estimated operational capitalization rates and volatilities. The Company's financial net assets measured at fair value on a recurring basis, including accrued interest components, consisted of the following types of instruments as of December 31, 2017 and 2016, respectively: As of December 31, 2017 Fair value measurements using input type Level 1 Level 2 Level 3 Total Available-for-sale marketable securities $ - $ 63,194 $ - $ 63,194 Foreign currency derivative contracts - 18 - 18 Earn-out liability - - (5,267 ) (5,267 ) Total financial net assets $ - $ 63,212 $ (5,267 ) $ 57,945 As of December 31, 2016 Fair value measurements using input type Level 1 Level 2 Level 3 Total Available-for-sale marketable securities $ - $ 60,507 $ - $ 60,507 Foreign currency derivative contracts - 28 - 28 Earn-out liability - - (4,504 ) (4,504 ) Total financial net assets $ - $ 60,535 $ (4,504 ) $ 56,031 Fair value measurements using significant unobservable inputs (Level 3): Balance at January 1, 2017 $ 4,504 Earn Out liability adjustments due to exchange rates 585 Adjustment due to change in the forecast of earn-out consideration 178 Balance at December 31, 2017 $ 5,267

DERIVATIVE INSTRUMENTS

DERIVATIVE INSTRUMENTS	12 Months Ended
	Dec. 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
DERIVATIVE INSTRUMENTS	NOTE 5:- DERIVATIVE INSTRUMENTS The Company enters into hedge transactions with a major financial institution, using derivative instruments, primarily forward contracts and options to purchase and sell foreign currencies, in order to reduce the net currency exposure associated with anticipated expenses (primarily salaries and related expenses that are designated as cash flow hedges) in currencies other than U.S. dollar, and forecasted revenues denominated in Euro. The net income (loss) recognized in "Financial income (expense), 801 The Company currently hedges such future exposures for a maximum period of one year. However, the Company may choose not to hedge certain foreign currency exchange exposures for a variety of reasons, including but not limited to immateriality, accounting considerations and the prohibitive economic cost of hedging particular exposures. There can be no assurance the hedges will offset more than a portion of the financial impact resulting from movements in foreign currency exchange rates. The Company records all derivatives on the consolidated balance sheets at fair value in accordance with ASC No. 820 at Level 2. The effective portion of cash flow hedges are recorded in other comprehensive income (loss) until the hedged item is recognized in earnings. The ineffective portion of cash flow hedges are adjusted to fair value through earnings in financial income (expenses), net. The Company does not enter into derivative transactions for trading purposes. The Company had a net unrealized income (loss) associated with cash flow hedges of $ 159 and $ (61) recorded in other comprehensive loss as of December 31, 2017 and 2016, respectively. As of December 31, 2017 and 2016, the Company had outstanding hedge transactions in the amount of $ 14,994 and $ 13,302, respectively. The fair value of the outstanding foreign exchange contracts recorded by the Company on its consolidated balance sheets as of December 31, 2017 and 2016, as assets and liabilities is as follows: Foreign exchange forward and December 31, options contracts Balance sheet 2017 2016 Fair value of foreign exchange hedge transactions Other receivables and prepaid expenses $ 160 $ 40 Fair value of foreign exchange hedge transactions Other payables and accrued expenses (1 ) (101 ) Total derivatives designated as hedging instruments Other Comprehensive income (loss) $ 159 $ (61 ) Gain or loss on the derivative instruments, which partially offset the foreign currency impact from the underlying exposures, reclassified from other comprehensive loss to operating expenses for the years ended December 31, 2017, 2016 and 2015 were $ (796) $ (242) and $ 1,407, respectively. Non-designated hedges The Company also uses foreign currency forward contracts to mitigate variability in gains and losses generated from the re-measurement of certain monetary assets and liabilities denominated in foreign currencies. These derivatives do not qualify for special hedge accounting treatment. These derivatives are carried at fair value with changes recorded in financial income, net. Changes in the fair value of these derivatives are largely offset by re-measurement of the underlying assets and liabilities. Cash flows from such derivatives are classified as operating activities. The derivatives have maturities of approximately twelve months. As of December 31, 2017 and 2016, the Company’s transactions were $ 24,593 and $ 14,969, respectively. The fair value of the outstanding non-designated foreign exchange contracts recorded by the Company on its consolidated balance sheets as of December 31, 2017 and 2016, as assets and liabilities is as follows: Foreign exchange forward and December 31, options contracts Balance sheet 2017 2016 Fair value of foreign exchange non-designated hedge transactions Other receivables and prepaid expenses $ 6 $ 181 Fair value of foreign exchange non-designated hedge transactions Other payables and accrued expenses (147 ) (92 ) Total derivatives designated as hedging instruments (141 ) $ 89

OTHER RECEIVABLES AND PREPAID E

OTHER RECEIVABLES AND PREPAID EXPENSES	12 Months Ended
	Dec. 31, 2017
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
OTHER RECEIVABLES AND PREPAID EXPENSES	NOTE 6:- OTHER RECEIVABLES AND PREPAID EXPENSES December 31, 2017 2016 Prepaid expenses $ 1,172 $ 1,739 Government authorities 919 1,003 Foreign currency derivative contracts 166 221 Short-term lease deposits 145 127 Receivable from third-party - 426 Others 247 363 $ 2,649 $ 3,879

INVENTORIES

INVENTORIES	12 Months Ended
	Dec. 31, 2017
Inventory Disclosure [Abstract]
INVENTORIES	NOTE 7:- INVENTORIES December 31, 2017 2016 Raw materials $ 1,684 $ 1,257 Finished goods 6,213 5,978 $ 7,897 $ 7,235 As of December 31, 2017 and 2016, the finished products line item above includes deferral of the cost of goods sold for which revenue was not yet recognized in the amount of approximately $ 901 and $ 512, respectively.

PROPERTY AND EQUIPMENT, NET

PROPERTY AND EQUIPMENT, NET	12 Months Ended
	Dec. 31, 2017
Property, Plant and Equipment [Abstract]
PROPERTY AND EQUIPMENT, NET	NOTE 8:- PROPERTY AND EQUIPMENT, NET December 31, 2017 2016 Cost: Lab equipment $ 14,613 $ 13,225 Computers and peripheral equipment 19,430 18,704 Office furniture and equipment 1,071 975 Leasehold improvements 1,809 1,238 36,923 34,142 Accumulated depreciation: Lab equipment 12,066 10,788 Computers and peripheral equipment 18,430 17,750 Office furniture and equipment 550 521 Leasehold improvements 875 696 31,921 29,755 Depreciated cost $ 5,002 $ 4,387 Depreciation expense for the years ended December 31, 2017, 2016 and 2015 was $ 2,191, $ 2,334 and $ 2,813, respectively.

INTANGIBLE ASSETS, NET

INTANGIBLE ASSETS, NET	12 Months Ended
	Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
INTANGIBLE ASSETS, NET	NOTE 9:- INTANGIBLE ASSETS, NET a. The following table shows the Company's intangible assets for the periods presented: Useful life December 31, (Years) 2017 2016 Original Cost: Technology 3.8 $ 9,111 $ 9,111 Backlog 2.8 1,877 1,877 Customer relationships 4.4 3,592 3,592 $ 14,580 $ 14,580 Accumulated amortization: Technology $ 7,633 $ 6,705 Backlog 1,877 1,867 Customer relationships 2,137 1,598 $ 11,647 $ 10,170 Amortized cost $ 2,933 $ 4,410 b. Amortization expense for the years ended December 31, 2017, 2016 and 2015 was $ 1,477, $ 1,709 and $ 2,895, respectively. During 2015, the Company recorded an impairment loss of $ 3,214 and $ 2,432 related to technology purchased in 2012 from acquisitions of Ortiva Wireless Inc. and Oversi Networks Ltd. ("Oversi"), respectively, due to the Company's decision to reach end of life on the respective product lines. The impairment loss was recorded in cost of revenues. During 2015, the Company recorded an impairment loss of $ 131 related to Oversi's customer relationships, due to the Company's decision to reach end of life on the respective product line. c. Estimated amortization expense for the years ending: Year ending December 31, 2018 1,630 2019 1,303 Total 2,933

OTHER PAYABLES AND ACCRUED EXPE

OTHER PAYABLES AND ACCRUED EXPENSES	12 Months Ended
	Dec. 31, 2017
Payables and Accruals [Abstract]
OTHER PAYABLES AND ACCRUED EXPENSES	NOTE 10:- OTHER PAYABLES AND ACCRUED EXPENSES December 31, 2017 2016 Accrued expenses $ 3,011 $ 2,255 Accrued taxes 2,311 416 Foreign currency derivative contracts 148 193 Advances from customers 17 23 Others 255 270 $ 5,742 $ 3,157

COMMITMENTS AND CONTINGENT LIAB

COMMITMENTS AND CONTINGENT LIABILITIES	12 Months Ended
	Dec. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENT LIABILITIES	NOTE 11:- COMMITMENTS AND CONTINGENT LIABILITIES a. Lease commitments: The Company signed several non-cancelable agreements for its facilities which vary in dates and terms. During 2016, the Company engaged in renting its main facilities for an average period of six years, starting March 2016. The total rental expenses are approximately $ 149 per month. The U.S. subsidiary has an operating lease for office facilities in Woburn, Massachusetts and in San Diego, California, the leases expire on August 31, 2019 and on April 30, 2018, respectively. The Spanish subsidiary has an operating lease for office facilities in Madrid, Spain, the leases expire within three month notice period. The Company's subsidiaries maintain smaller offices in South Africa, China, Singapore, India, Japan, New Zealand, Colombia, United States and various locations in Europe. In addition, the Company has operating lease agreements for its motor vehicles, which terminate in 2018 through 2020. Operating leases (offices and motor vehicles) expense for the years ended December 31, 2017, 2016 and 2015 was $ 3,126, $ 2,758 and $ 2,828, respectively. As of December 31, 2017, the aggregate future minimum lease obligations (offices and motor vehicles) under non-cancelable operating leases agreements were as follows: Year ending December 31, 2018 $ 2,403 2019 1,610 2020 844 2021 300 2022 75 Total $ 5,232 b. Major subcontractor: The Company currently depends on one subcontractor to manufacture and provide hardware, warranty and support for its traffic management systems. If the subcontractor experiences delays, disruptions, quality control problems or a loss in capacity, shipments of products may be delayed and the Company's ability to deliver products could be materially adversely affected. Certain hardware components for the Company's products come from single or limited sources, and the Company could lose sales if these sources fail to satisfy its supply requirements. In the event that the Company terminates its business connection with the subcontractor, it will have to compensate the subcontractor for certain inventory costs, as specified in the agreement with the subcontractor. c. Litigations On February 18, 2016, a former employee filed a claim against the Company alleging that he is entitled to compensation for unlawful dismissal by the Company. A mediation attempt has failed, and the Company is waiting for the first hearing to take place. The Company believes that it has valid defenses to the claim. According to the assessment by the Company's legal counsel the award is not expected to exceed $ 190.

SHAREHOLDERS' EQUITY

SHAREHOLDERS' EQUITY	12 Months Ended
	Dec. 31, 2017
Stockholders' Equity Note [Abstract]
SHAREHOLDERS' EQUITY	NOTE 12:- SHAREHOLDERS' EQUITY a. Company's shares: As of December 31, 2017, the Company's authorized share capital consists of NIS 20,000,000 divided into 200,000,000 Ordinary Shares, par value NIS 0.1 per share. Ordinary Shares confer on their holders the right to receive notice to participate and vote in general meetings of the Company, the right to a share in the excess of assets upon liquidation of the Company, and the right to receive dividends, if declared. b. Treasury stock: On August 2015, the Company's Board of Directors authorized the repurchase of up to an aggregate of $ 15 million of the Company's Ordinary shares in the open market, subject to normal trading restrictions. During November 2015, the Company received court's approvals to purchase up to $ 15 million of its ordinary shares. The court's approval for share repurchases was expired on May 26, 2016. On July 6, 2016, the Company received the court's approval to extend the share repurchase period for additional 6 months. During 2015 the Company purchased 25,000 of its Ordinary shares for a total consideration of $ 166. During 2016 the Company purchased 791,000 of its Ordinary shares for a total consideration of $ 3,832. During 2017 the company did not purchase any of its ordinary shares. c. Stock option plan: A summary of the Company's stock option activity, pertaining to its option plans for employees and related information is as follows: Year ended December 31, 2017 2016 2015 Number of shares upon exercise Weighted average exercise price Number of shares upon exercise Weighted average exercise price Number of shares upon exercise Weighted average exercise price Outstanding at beginning of year 1,959,014 $ 8.24 2,811,966 $ 10.70 2,531,381 $ 11.99 Granted 676,550 $ 4.93 643,697 $ 4.99 704,348 $ 6.73 Forfeited (346,750 ) $ 7.01 (1,358,492 ) $ 12.41 (320,496 ) $ 15.13 Exercised (99,517 ) $ 3.56 (138,157 ) $ 1.75 (103,267 ) $ 1.28 Outstanding at end of year 2,189,297 $ 7.63 1,959,014 $ 8.24 2,811,966 $ 10.70 Exercisable at end of year 1,274,649 $ 9.26 1,072,658 $ 9.87 1,646,204 $ 11.99 Vested and expected to vest 1,607,782 $ 8.44 1,407,930 $ 9.04 2,197,848 $ 11.16 The aggregate intrinsic value represents the total intrinsic value (the difference between the Company's closing stock price on the last trading day of the fiscal years 2017, 2016 and 2015 and the exercise price, multiplied by the number of in-the-money options) that would have been received by the option holders had all option holders exercised their options on December 31, 2017, 2016 and 2015, respectively. This amount may change based on the fair market value of the Company's stock. The total intrinsic value of options outstanding at December 31, 2017, 2016 and 2015, were $ 1,063, $ 728 and $ 1,580, respectively. The total intrinsic value of exercisable options at December 31, 2017, 2016 and 2015, were approximately $ 684, $ 604 and $ 1,170, respectively. The total intrinsic value of options vested and expected to vest at December 31, 2017, 2016 and 2015, were approximately $ 819, $ 634 and $ 1,363, respectively. The total intrinsic value of options exercised during the years ended December 31, 2017, 2016 and 2015 were approximately $ 176, $ 415 and $ 469, respectively. The weighted-average grant-date fair value of the options granted during the years ended December 31, 2017, 2016 and 2015 were $ 2.36, $ 2.12 and $ 3.45, respectively. The number of options vested during the year ended December 31, 2017 was 615,434. The weighted-average remaining contractual life of the outstanding options as of December 31, 2017 is 5.44 years. The weighted-average remaining contractual life of exercisable options as of December 31, 2017 is 4.48 years. On May 2, 2016 the Board of Directors of the Company approved the repricing of 384,635 stock options for the Company's employees and executive officers, previously granted. As part of the repricing, options with exercise price higher than $ 7 per share were repriced. Repriced options were replaced by options with lower exercise price or RSU's. The vesting period for the new granted options and RSU's was schedule for two years. The incremental expense for the repricing of the options was approximately $ 470. For the year ended December 31, 2016, the Company recorded expenses totaling $ 155 associated with the repricing. The options outstanding as of December 31, 2017, have been classified by exercise price, as follows: Exercise price Shares upon exercise of options outstanding as of December 31, 2017 Weighted average remaining contractual life Shares upon exercise of options exercisable as of December 31, 2017 Years $ 23.31-27.58 73,000 4.62 73,000 $ 15.20-17.07 112,748 3.70 111,618 $ 10.16-14.68 337,750 5.69 312,866 $ 5.01-9.13 654,474 4.31 438,662 $ 0.03-4.95 1,011,325 6.35 338,503 2,189,297 1,274,649 The following provides a summary of the restricted stock unit activity for the Company for the two years ended December 31, 2017: Year ended December 31, 2017 2016 Number of shares upon exercise Weighted average share price Number of shares upon exercise Weighted average share price Outstanding at beginning of year 592,126 $ 6.53 359,404 $ 10.95 Granted 612,173 $ 5.00 531,570 $ 4.59 Vested (326,026 ) $ 6.48 (152,460 ) $ 10.08 Forfeited (165,183 ) $ 6.04 (146,388 ) $ 6.85 Unvested at end of year 713,090 $ 6.04 592,126 $ 6.53 As of December 31, 2017, $ 1,817 and $ 2,844 unrecognized compensation cost related to stock options and RSUs respectively is expected to be recognized over a weighted average vesting period of 2.77 years. As of December 31, 2017, the Company holds outstanding options under the 2016 option plan (formerly, 2006 Plan). The outstanding options and RSUs under the 2016 plan are exercisable to 2,189,297 and 713,090 Ordinary shares respectively. Under the terms of the above option plans, options may be granted to employees, officers, directors and various service providers of the Company and its subsidiaries. The options generally become exercisable quarterly over a four-year period, commencing one year after date of the grant, subject to the continued employment of the employee. The options generally expire no later than ten years from the date of the grant. The exercise price of the options at the date of grant under the plans may not be less than the nominal value of the shares into which such options are exercised, any options, which are forfeited or cancelled before expiration, become available for future grants. As of December 31, available for future issuance under the option plans. In addition to granting stock options, the Company granted 612,173 and 531,570 RSUs in 2017 and 2016, respectively under the 2016 option plan. RSUs vest over a four year period subject to the continued employment of the employee. RSUs that are cancelled or forfeited become available for future grants.

TAXES ON INCOME

TAXES ON INCOME	12 Months Ended
	Dec. 31, 2017
Income Tax Disclosure [Abstract]
TAXES ON INCOME	NOTE 13:- TAXES ON INCOME a. Corporate tax rates: The Israeli corporate income tax rate was 24% in 2017, 25% in 2016 and 26.5% in 2015. In January 2016, the Law for Amending the Income Tax Ordinance (No. 216) (Reduction of Corporate Tax Rate), 2016 was approved, which includes a reduction of the corporate tax rate from 26.5% to 25%, effective from January 1, 2016. In December 2016, a further reduction in the corporate tax rate to 24% effective January 2017 and to 23% effective January 1, 2018 and thereafter was enacted. b. Foreign Exchange Regulations: Commencing in taxable year 2012, the Company has elected to measure its taxable income and file its tax return under the Israeli Income Tax Regulations (Principles Regarding the Management of Books of Account of Foreign Invested Companies and Certain Partnerships and the Determination of Their Taxable Income) 1986 ("Foreign Exchange Regulations"). Under the Foreign Exchange Regulations, an Israeli company must calculate its tax liability in U.S. Dollars according to certain rules. The tax liability, as calculated in U.S. Dollars is translated into NIS according to the exchange rate as of December 31st of each year. c. Tax benefits under Israel's law for the Encouragement of Capital Investments, 1959 ("the Law"): In 1998, the production facilities of the Company related to its computational technologies were granted the status of an "Approved Enterprise" under the Law. In 2004, an expansion program was granted the status of "Approved Enterprise". According to the provisions of the Law, the Company has elected the alternative track of benefits and has waived Government grants in return for tax benefits. The period of tax benefits, detailed above, is limited to the earlier of 12 years from the commencement of production, or 14 years from the approval date. According to the provisions of the Law under the alternative track, the Company's income may be tax-exempt for a period of two years commencing with the year it first earns taxable income, and subject to corporate taxes at the reduced rate of 10% to 25%, for an additional period of five to eight years depending upon the level of foreign ownership of the Company. The Law was significantly amended effective April 1, 2005 ("the 2005 - Amendment"). The 2005 - Amendment includes revisions to the criteria for investments qualified to receive tax benefits as a Beneficiary Enterprise and among other things, simplifies the approval process. The Amendment applies to new investment programs. Therefore, investment programs commencing after December 31, 2004, do not affect the approved programs of the Company. In addition, the Law provides that terms and benefits included in any letter of approval already granted will remain subject to the provisions of the Law as they were on the date of such approval. Therefore, the Company's existing Approved Enterprise will generally not be subject to the provisions of the 2005 - Amendment. The Company elected 2006 and 2009 as "year of election" under the 2005 - Amendment. The entitlement to the above benefits is contingent upon the fulfillment of the conditions stipulated in the Law, regulations published thereunder and the criteria set forth in the specific letters of approval. In the event of failure to comply with these conditions, the benefits may be canceled and the Company may be required to refund the amount of the benefits, in whole or in part, including interest and linked to changes in the Israeli CPI. As of December 31, 2017, management believes that the Company meets the aforementioned conditions. If the Company pays a dividend out of exempt income derived from the Approved and Beneficiary Enterprise, it will be subject to corporate tax in respect of the gross amount distributed, including any taxes thereon, at the rate which would have been applicable had it not enjoyed the alternative benefits, generally 10%-25%, depending on the percentage of the Company's Ordinary shares held by foreign shareholders. The dividend recipient is subject to withholding tax at the rate of 15% applicable to dividends from approved enterprises, if the dividend is distributed during the tax exemption period or within twelve years thereafter. As of December 31, 2017, there is no income earned by the Company Israel’s “Approved Enterprises” and “Beneficiary Enterprise”. Income from sources other than the "Approved and Beneficiary Enterprise" during the benefit period will be subject to tax at the regular corporate tax rate. As of January 1, 2011, new legislation amending the Law came into effect (the 2011 Amendment ). The 2011 Amendment introduced a new status of Preferred Company and Preferred Enterprise , replacing the then existing status of Beneficiary Company and Beneficiary Enterprise . Similarly to Beneficiary Company , a Preferred Company is an industrial company owning a Preferred Enterprise which meets certain conditions (including a minimum threshold of 25% export). However, under this legislation the requirement for a minimum investment in productive assets was cancelled . Under the 2011 Amendment, a uniform corporate tax rate will apply to all qualifying income of the Preferred Company, as opposed to the former law, which was limited to income from the Approved Enterprises and Beneficiary Enterprise during the benefits period. The uniform corporate tax rate was 9% in areas in Israel designated as Development Zone A and 16% elsewhere in Israel during 2016 and 2017. A dividend distributed from income which is attributed to a Preferred Enterprise/Special Preferred Enterprise will be subject to withholding tax at source at the following rates: (i) Israeli resident corporation – 0%, (ii) Israeli resident individual – 20% as of 2014 and thereafter (iii) non-Israeli resident - 20% as of 2014 and thereafter subject to a reduced tax rate under the provisions of an applicable double tax treaty. In December 2016, the Economic Efficiency Law (Legislative Amendments for Applying the Economic Policy for the 2017 and 2018 Budget Years), 2016 which includes Amendment 73 to the Law for the Encouragement of Capital Investments ("the 2016 - Amendment") was published. According to the 2016 - Amendment, a preferred enterprise located in development area A will be subject to a tax rate of 7.5% instead of 9% effective from January 1, 2017 and thereafter (the tax rate applicable to preferred enterprises located in other areas remains at 16%). The December amendment prescribes special tax tracks for technological enterprises, the tax tracks under the amendment are as follows : Technological preferred enterprise - an enterprise whose total consolidated revenues (parent company and all subsidiaries) is less than NIS 10 billion. A technological preferred enterprise, as defined in the Law, the center of Israel deriving (in development area A - a tax rate 7.5%). Special technological preferred enterprise - an enterprise whose total consolidated revenues (parent company and all subsidiaries) exceeds NIS 10 billion. Such enterprise will be subject to tax at a rate of 6% on profits deriving from intellectual property, regardless of the enterprise’s geographical location. Under the transition provisions of the 2016 Amendment, the Company may decide to irrevocably implement the new law while waiving benefits provided under the current law or to remain subject to the current law. d. Tax benefits under the law for the Encouragement of Industry (Taxes), 1969 (the "Encouragement Law"): The Encouragement Law, provides several tax benefits for industrial companies. An industrial company is defined as a company resident in Israel, at least 90% of the income of which in a given tax year exclusive of income from specified Government loans, capital gains, interest and dividends, is derived from an industrial enterprise owned by it. An industrial enterprise is defined as an enterprise whose major activity in a given tax year is industrial production activity. Management believes that the Company is currently qualified as an "industrial company" under the Encouragement Law and as such, enjoys tax benefits, including: (1) deduction of purchase of know-how and patents and/or right to use a patent over an eight-year period; (2) the right to elect, under specified conditions, to file a consolidated tax return with additional related Israeli industrial companies and an industrial holding company; (3) accelerated depreciation rates on equipment and buildings; and (4) expenses related to a public offering on the Tel-Aviv Stock Exchange and on recognized stock markets outside of Israel, are deductible in equal amounts over three years. Eligibility for benefits under the Encouragement Law is not subject to receipt of prior approval from any governmental authority. No assurance can be given that the Israeli tax authorities will agree that the Company qualifies, or, if the Company qualifies, then the Company will continue to qualify as an industrial company or that the benefits described above will be available to the Company in the future. e. Pre-tax income (loss) is comprised as follows: Year ended December 31, 2017 2016 2015 Domestic $ (17,539 ) $ (7,033 ) $ (16,898 ) Foreign 1,031 1,243 412 $ (16,508 ) $ (5,790 ) $ (16,486 ) f. A reconciliation of the theoretical tax expenses, assuming all income is taxed at the statutory tax rate applicable to the income of the Company and the actual tax expenses is as follows: Year ended December 31, 2017 2016 2015 Loss before taxes on income $ (16,508 ) $ (5,790 ) $ (16,486 ) Theoretical tax income computed at the Israeli statutory tax rate (24%, 25% and 26.5% for the years 2017, 2016 and 2015, respectively) $ (3,962 ) $ (1,448 ) $ (4,369 ) Changes in valuation allowance 8,946 (469 ) 3,716 Increase (decrease) in losses and temporary differences due to change in Israeli corporate and “Approved Enterprise" tax (5,376 ) (216 ) 679 Write off of prepaid and withholding taxes 909 1,759 1,150 Foreign tax rates differences related to subsidiaries (48 ) 576 103 Non-deductible expenses and other 684 567 181 Non-deductible share-based compensation expense 411 1,435 1,896 Actual tax expense $ 1,564 $ 2,204 $ 3,356 g. Income tax expense is comprised as follows: Year ended December 31, 2017 2016 2015 Current taxes $ 689 $ 211 $ 146 Deferred taxes (benefit) ( 34 ) 234 2,060 Write off of prepaid and withholding taxes 909 1,759 1,150 $ 1,564 $ 2,204 $ 3,356 h. Net operating losses carry forward: The Company has accumulated net operating losses for tax purposes as of December 31, 2017, in the amount of approximately $ 52,966, which may be carried forward and offset against taxable income in the future for an indefinite period. In December 2014, the Israeli Tax Authorities approved a final tax ruling with respect to the Company’s acquisition of Oversi. According to the ruling, the net operating losses may be offset against taxable income annually with a limitation of up to 14% of the total accumulated losses but no more than 50% of the Company's taxable income. As of December 31, 2017, the Company recorded a full valuation allowance with respect to its deferred tax assets in Allot Communications Ltd. and wrote-off prepaid and withholding taxes of $ 2,668 as the Company does not expect to utilize these tax assets in the near future. In addition, the Company has accumulated capital losses for tax purposes as of December 31, 2017, of approximately $ 27,300, which may be carried forward and offset against taxable capital gains in the future for an indefinite period, but are limited as stated above with regard to the Oversi merger. Management currently believes that since the Company has a history of losses, and uncertainty with respect to future taxable income, it is more likely than not that the deferred tax assets regarding the loss carry forwards will not be utilized in the foreseeable future. Thus, a valuation allowance was provided to reduce deferred tax assets to their realizable value. The U.S. subsidiary has accumulated losses for U.S. federal income tax return purposes of approximately $ 5,910 and $ 5,285 for state taxes. The federal accumulated losses for tax purposes expire between 2026 and 2032. The state accumulated losses for tax purposes began to expire in 2014. As of December 31, 2017, the Company recorded a valuation allowance with respect to its deferred tax assets in the US Subsidiary. Such losses are subject to limitations of Internal Revenue Code, Section 382, which in general provides that utilization of net operating losses is subject to an annual limitation if an ownership change results from transactions increasing the ownership of certain shareholders or public groups in the stock of a corporation by more than 50 percentage points over a three-year period. The annual limitations may result in the expiration of losses before utilization. In December 2107 the U.S. Tax Cuts and Jobs Act of 2017 was signed into law. This legislation makes significant changes to the U.S. Internal Revenue Code. Such changes include a reduction in the corporate tax rate, changes in U.S. international taxation and limitations on certain corporate deductions and credits, among other changes. The deferred tax asset at December 31, 2017 reflects the impact of the US Tax reform. i. Deferred income taxes: Deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. Significant components of the Company's deferred income taxes are as follows: December 31, 2017 2016 Deferred tax assets: Operating and capital loss carryforwards $ 20,102 $ 12,900 Reserves and allowances 3,800 2,022 Deferred tax asset before valuation allowance 23,902 14,922 Valuation allowance (23,601 ) (14,655 ) Net deferred tax asset 301 267 Deferred tax liability - - Net deferred tax asset $ 301 $ 267 j. As of December 31, 2017, the Company recorded a provision in respect of ASC 740-10 in the amount of $ 245. The accrued interest and penalties related to the provision in income taxes is immaterial. As of December 31, 2016, the provision was immaterial. The Company conducts business globally and, as a result, the Company or one or more of its subsidiaries file income tax returns in the U.S. federal jurisdiction and various states and foreign jurisdictions. In the normal course of business, the Company is subject to examination by taxing authorities throughout the world, including such major jurisdictions as Israel, France, and the United States. With a few exceptions, the Company is no longer subject to Israeli tax assessment through the year 2012 and the European and U.S. subsidiaries have final tax assessments through 2013. The Company is currently under audit by the Israeli Tax Authorities for the years 2013 – 2016.

GEOGRAPHIC INFORMATION

GEOGRAPHIC INFORMATION	12 Months Ended
	Dec. 31, 2017
Segment Reporting [Abstract]
GEOGRAPHIC INFORMATION	NOTE 14:- GEOGRAPHIC INFORMATION Allot operates in a single reportable segment. Revenues are based on the location of the Company's channel partners which are considered as end customers, as well as direct customers of the Company: Year ended December 31, 2017 2016 2015 Europe $ 40,394 $ 34,279 $ 39,110 Asia and Oceania 13,936 27,700 28,495 Americas 15,532 16,025 22,553 Middle East and Africa 12,130 12,365 9,809 $ 81,992 $ 90,369 $ 99,967 The following are the Company’s major customers: Year ended December 31, 2017 2016 2015 Customer A 32 % 25 % 27 % Customer B - 17 % - Customer C - - 10 % 32 % 42 % 37 % The following presents total long-lived assets as of December 31, 2017 and 2016: December 31, 2017 2016 Long-lived assets: Israel $ 4,741 $ 4,156 United States 14 42 Other 247 189 $ 5,002 $ 4,387

FINANCIAL INCOME (EXPENSES), NE

FINANCIAL INCOME (EXPENSES), NET	12 Months Ended
	Dec. 31, 2017
Other Income and Expenses [Abstract]
FINANCIAL INCOME (EXPENSES), NET	NOTE 15:- FINANCIAL INCOME (EXPENSES), NET Year ended December 31, 2017 2016 2015 Financial income (expenses): Interest income $ 2,513 $ 2,466 $ 2,174 Financial expenses: Exchange rate differences and other 602 186 1,480 Amortization/accretion of premium/discount on marketable securities, net 1,017 1,221 1,278 $ 894 $ 1,059 $ (584 )

EARNINGS PER SHARE

EARNINGS PER SHARE	12 Months Ended
	Dec. 31, 2017
Net loss per share:
EARNINGS PER SHARE	NOTE 16:- EARNINGS PER SHARE The following table sets forth the computation of basic and diluted net loss per share: Year ended December 31, 2017 2016 2015 Numerator: Net loss $ (18,072 ) $ (7,994 ) $ (19,842 ) Denominator: Weighted average number of shares outstanding used in computing basic and 33,253,158 33,202,309 33,419,917 Basic and diluted net loss per share $ (0.54 ) $ (0.24 ) $ (0.59 ) The following numbers of shares were excluded from the computation of diluted net loss per ordinary share for the periods presented because including them would have had an anti-dilutive effect: Year ended December 31, 2017 2016 2015 Ordinary shares 2,166,782 2,000,757 3,424,891

SUBSEQUENT EVENT

SUBSEQUENT EVENT	12 Months Ended
	Dec. 31, 2017
Subsequent Events [Abstract]
SUBSEQUENT EVENT	NOTE 17:- SUBSEQUENT EVENT In January 2018, the Company signed a Shares Purchase Agreement of all of the outstanding shares of Netonomy Ltd (“Netonomy") a developer of software-based cyber security for the connected home. Under the terms of the Shares Purchase Agreement, the Company will acquire the shares of Netonomy for approximately $3,200 in cash. In addition, there is a performance-based contingent amount, over a period of two and a half years following closing. The acquisition price is capped at approximately $4,300 million and is contingent upon reaching certain revenues threshold from the sale of Netonomy products. The transaction closing date occurred on January 15, 2018.

SIGNIFICANT ACCOUNTING POLICI26

SIGNIFICANT ACCOUNTING POLICIES (Policies)	12 Months Ended
	Dec. 31, 2017
Accounting Policies [Abstract]
Use of estimates	a. Use of estimates: The preparation of the consolidated financial statements in conformity with U.S. GAAP requires management to make estimates, judgments and assumptions. The Company's management believes that the estimates, judgments and assumptions used are reasonable based upon information available at the time they are made. These estimates, judgments and assumptions can affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the dates of the financial statements, and the reported amounts of revenue and expenses during the reporting period. Actual results could differ from those estimates.
Financial statements in U.S. dollars	b. Financial statements in U.S. dollars: The majority of the revenues of the Company and its subsidiaries are generated in U.S. dollars ("dollar") or linked to the dollar. In addition, a major portion of the Company's and certain of its subsidiaries' costs are incurred or determined in dollars. The Company's management believes that the dollar is the currency of the primary economic environment in which the Company and its subsidiaries operate. Thus, the functional and reporting currency of the Company and its subsidiaries is the dollar. Accordingly, monetary accounts maintained in currencies other than the dollar are remeasured into U.S. dollars in accordance with Accounting Standards Codification No. 830, "Foreign Currency Matters" ("ASC No. 830"). All transactions gains and losses from the remeasurement of monetary balance sheet items are reflected in the statements of operations as financial income or expenses as appropriate.
Principles of consolidation	c. Principles of consolidation: The consolidated financial statements include the accounts of the Company and its subsidiaries. Intercompany balances and transactions have been eliminated upon consolidation.
Cash and cash equivalents	d. Cash and cash equivalents: The Company considers all unrestricted highly liquid investments which are readily convertible into cash, with maturity of three months or less at the date of acquisition, to be cash equivalents.
Restricted deposits	e. Restricted deposits: The restricted deposits are held in favor of financial institutions in respect of fulfillments of forward contract and operating obligations.
Short-term bank deposits	f. Short-term bank deposits: Short-term bank deposits are deposits with maturities of more than three months but less than one year at the balance sheet date. The deposits are in dollars and bear interest at annual weighted average rate of 1.63% and 1.37% at December 31, 2017 and 2016, respectively. In connection with the Company's hedging transactions, the Company is required to maintain compensating deposits balances in the bank. Out of the short-term bank deposits, a total of $2,581 and $2,553, are due to the hedging transactions as of December 31, 2017 and 2016, respectively.
Marketable securities	g. Marketable securities: The Company accounts for investments in marketable securities in accordance with ASC 320, "Investments - Debt and Equity Securities". Management determines the appropriate classification of its investments in debt securities at the time of purchase and re-evaluates such determinations at each balance sheet date. Marketable securities classified as "available-for-sale" are carried at fair value, based on quoted market prices. Unrealized gains and losses are reported in a separate component of shareholders' equity in accumulated other comprehensive income (loss). Gains and losses are recognized when realized, on a specific identification basis, in the Company's consolidated statements of comprehensive loss. The Company's securities are reviewed for impairment in accordance with ASC 320-10-35. If such assets are considered to be impaired, the impairment charge is recognized in earnings when a decline in the fair value of its investments below the cost basis is judged to be Other-Than-Temporary Impairment (OTTI). Factors considered in making such a determination include the duration and severity of the impairment, the reason for the decline in value, the potential recovery period and the Company's intent to sell, including whether it is more likely than not that the Company will be required to sell the investment before recovery of cost basis. Based on the above factors, the Company concluded that unrealized losses on its available-for-sale securities, for the years ended 2017, 2016 and 2015, were not OTTI.
Inventories	h. Inventories: Inventories are stated at the lower of cost or net realizable Inventory write-off provision as of December 31, 2017 and 2016 amounted to $ 2,756 and $ 1,957, respectively. Cost is determined using the weighted average cost method.
Property and equipment, net	i. Property and equipment, net: Property and equipment are stated at cost, net of accumulated depreciation. Depreciation is calculated by the straight-line method over the estimated useful lives of the assets at the following annual rates: % Lab equipment 16 - 25 Computers and peripheral equipment 33 Office furniture 6 Leasehold improvements Over the shorter of the term of the lease or the useful life of the asset
Goodwill impairment	j. Goodwill impairment: Goodwill represents the excess of the purchase price over the fair value of net assets of purchased businesses. Under Accounting Standards Codification No. 350, "Intangibles-Goodwill and Other" ("ASC No. 350"), goodwill is not amortized, but rather subject to an annual impairment test, or more often if there are indicators of impairment present. In accordance with ASC No. 350 the Company performs an annual impairment test at December 31 each year. ASC 350 allows an entity to first assess qualitative factors to determine whether it is necessary to perform the two-step quantitative goodwill impairment test. If the qualitative assessment does not result in a more likely than not indication of impairment, no further impairment testing is required. If it does result in a more likely than not indication of impairment, the two-step impairment test is performed. Alternatively, ASC 350 permits an entity to bypass the qualitative assessment for any reporting unit and proceed directly to performing the first step of the goodwill impairment test. The first step, identifying a potential impairment, compares the fair value of the reporting unit with its carrying amount. If the carrying amount exceeds its fair value, the second step would need to be performed; otherwise, no further step is required. The second step, measuring the impairment loss, compares the implied fair value of the goodwill with the carrying amount of the goodwill. Any excess of the goodwill carrying amount over the applied fair value is recognized as an impairment loss, and the carrying value of goodwill is written down to fair value. The Company operates in one operating segment, and this segment comprises its only reporting unit. The Company has performed an annual impairment analysis as of December 31, 2017 and determined that the carrying value of the reporting unit was less than the fair value of the reporting unit. Fair value is determined using market capitalization. During years 2017, 2016 and 2015, no impairment losses were recorded.
Impairment of long lived assets and intangible assets subject to amortization	k. Impairment of long lived assets and intangible assets subject to amortization: Property and equipment and intangible assets subject to amortization are reviewed for impairment in accordance with ASC No. 360, "Accounting for the Impairment or Disposal of Long-Lived Assets," whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of an asset to the future undiscounted cash flows expected to be generated by the assets. If such assets are considered to be impaired, the impairment to be recognized is measured by the amount by which the carrying amount of the assets exceeds the fair value of the assets. Intangible assets acquired in a business combination are recorded at fair value at the date of acquisition. Following initial recognition, intangible assets are carried at cost less any accumulated amortization and any accumulated impairment losses. The useful lives of intangible assets are assessed to be either finite or indefinite. Intangible assets that are not considered to have an indefinite useful life are amortized over their estimated useful lives. Some of the acquired intangible assets are amortized over their estimated useful lives in proportion to the economic benefits realized. This accounting policy results in accelerated amortization of such customer relationships as compared to the straight-line method. All other intangible assets are amortized over their estimated useful lives on a straight-line basis. During the years ended December 31, 2017 and 2016, no impairment losses were recorded. During 2015, the Company recorded impairment loss (see Note 9).
Revenue recognition	l. Revenue recognition: The Company generates revenues mainly from selling its products along with related maintenance and support services. At times, these arrangements may also include professional services, such as installation services or training. The Company generally sells its products through resellers, distributors, OEMs and system integrators, all of whom are considered end-users. Revenues from product sales are recognized when persuasive evidence of an agreement exists, title and risk of loss have transferred, no significant performance obligations remain, product payment is not contingent upon performance of installation or service obligations, the fee is fixed or determinable and collectability is probable. In instances where acceptance of the product or service is specified by the customer, revenue recognition is deferred until all acceptance criteria have been met. Maintenance and support related revenues included in multiple element arrangements are deferred and recognized on a straight-line basis over the term of the applicable maintenance and support agreement. Other services are recognized upon the completion of installation or when the service is provided. In instances where the services provided in a multiple element arrangement are considered essential to the functionality of the product and payment of the product is contingent upon performance of the services, the sales of the products and services would be considered one unit of accounting. Pursuant to the guidance of ASU 2009-13, "Multiple-Deliverable Revenue Arrangements, (amendments to ASC Topic 605, Revenue Recognition)" (ASU 2009-13) and ASU 2009-14, when a sales arrangement contains multiple elements, such as products and services, the Company allocates revenues to each element based on a selling price hierarchy. The selling price for a deliverable is based on VSOE if available, third party evidence ("TPE") if VSOE is not available, or best estimate of BESP Revenue arrangements with multiple deliverables are allocated using the relative selling price method. The Company determines the estimated selling price in multiple elements arrangements as follows: The Company determines the BESP The Company determines the selling price for maintenance and support based on VSOE of the price charged based on standalone sales (renewals) of such elements using a consistent percentage of the Company's product price lists. Deferred revenue includes amounts received from customers for which revenue has not yet been recognized. . The Company records a provision for estimated product returns based on its experience with historical product returns and other known factors. Such provisions amounted to $ 686 and $ 910 as of December 31, 2017 and 2016, respectively.
Advertising expenses	m. Advertising expenses: Advertising expenses are charged to the statement of comprehensive loss, as incurred. Advertising expenses for the years ended December 31, 2017, 2016 and 2015 amounted to $ 1,236, $ 1,081 and $ 1,201, respectively.
Research and development costs	n. Research and development costs: Accounting Standards Codification No. 985-20, requires capitalization of certain software development costs subsequent to the establishment of technological feasibility. Based on the Company's product development process, technological feasibility is established upon the completion of a working model. The Company does not incur material costs between the completion of a working model and the point at which the products are ready for general release. Therefore, research and development costs are charged to the consolidated statement of comprehensive loss as incurred.
Severance pay	o. Severance pay: The liability in Israel for substantially all of the Company`s employees in respect of severance pay liability is calculated in accordance with Section 14 of the Severance Pay Law -1963 (herein- "Section 14"). Section 14 states that Company's contributions for severance pay shall be in line of severance compensation and upon release of the policy to the employee, no additional obligations shall be conducted between the parties regarding the matter of severance pay and no additional payments shall be made by the Company to the employee. Furthermore, the related obligation and amounts deposited on behalf of such obligation under Section 14, are not stated on the balance sheet, because pursuant to current ruling, they are legally released from obligation to employees once the deposits have been paid. There are a limited number of employees in Israel, for whom the Company is liable for severance pay. The Company's liability for severance pay for its Israeli employees was calculated pursuant to Section 14, based on the most recent monthly salary of its Israeli employees multiplied by the number of years of employment as of the balance sheet date for such employees. The Company's liability was partly provided by monthly deposits with severance pay funds and insurance policies and the remainder by an accrual. Severance expense for the years ended December 31, 2017, 2016 and 2015, amounted to $ 1,801, $ 1,976 and $ 2,286, respectively.
Accounting for stock-based compensation	p. Accounting for stock-based compensation: The Company accounts for stock based compensation in accordance with Accounting Standards Codification No. 718, "Compensation - Stock Compensation" ("ASC No. 718") that requires companies to estimate the fair value of equity-based payment awards on the date of grant using an option-pricing model. The value of the portion of the award that is ultimately expected to vest is recognized as an expense over the requisite service periods in the Company's consolidated statement of comprehensive loss. The Company recognizes compensation expenses for the value of its awards based on the straight line method over the requisite service period of each of the awards, net of estimated forfeitures. The Company accounted for changes in award terms as a modification in accordance with ASC 718. A modification to the terms of an award should be treated as an exchange of the original award for a new award with total compensation cost equal to the grant-date fair value of the original award plus the incremental value measured at the same date. Under ASC 718, the calculation of the incremental value is based on the excess of the fair value of the new (modified) award based on current circumstances over the fair value of the original award measured immediately before its terms are modified based on current circumstances. The Company estimated the forfeiture rate based on historical forfeitures of equity awards and adjusted the rate to reflect changes in facts and circumstances, if any. The Company adopted ASU 2016-09 in the first quarter of fiscal year 2017, and elected to retain its existing accounting policy and estimate expected forfeitures. The adoption of this ASU did not have a material impact on the Company's. The following table sets forth the total stock-based compensation expense resulting from stock options and restricted share units ("RSUs") Year ended December 31, 2017 2016 2015 Cost of revenues $ 362 $ 367 $ 324 Research and development 648 1,240 1,637 Sales and marketing 1,166 1,833 2,802 General and administrative 1,190 1,701 2,407 Total stock-based compensation expense $ 3,366 $ 5,141 $ 7,170 The Company selected the binomial option pricing model as the most appropriate fair value method for its stock-based compensation awards with the following assumptions for the years ended December 31, 2017, 2016 and 2015: Year ended December 31, 2017 2016 2015 Suboptimal exercise multiple 2.9-3.5 2.9-3.5 3 Risk free interest rate 0.80%-2.20 % 0.47%-1.58 % 0.23%-2.35 % Volatility 27%-49 % 33%-51 % 37%-55 % Dividend yield 0 % 0 % 0 % The expected annual post-vesting and pre-vesting forfeiture rates affects the number of exercisable options. Based on the Company's historical experience, the annual pre-vesting and post-vesting are in the range of 0%-34% and 0%-29%, respectively, in the years 2017, 2016, and 2015. The computations of expected volatility and suboptimal exercise multiple is based on the average of the Company's realized historical stock price. The computation of the suboptimal exercise multiple and the forfeiture rates are based on the grantees expected exercise prior and post vesting termination behavior. The interest rate for period within the contractual life of the award is based on the U.S. Treasury Bills yield curve in effect at the time of grant. The Company currently has no plans to distribute dividends and intends to retain future earnings to finance the development of its business. The expected life of the stock options represents the weighted-average period the stock options are expected to remain outstanding and is a derived output of the binomial model. The expected life of the stock options is impacted by all of the underlying assumptions used in the Company's model.
Treasury stock	q. Treasury stock: The Company repurchases its Ordinary shares from time to time on the open market and holds such shares as treasury stock. The Company presents the cost to repurchase treasury stock as a reduction of shareholders' equity.
Concentration of credit risks	r. Concentration of credit risks: Financial instruments that potentially subject the Company to concentrations of credit risk consist primarily of cash and cash equivalents, marketable securities, short-term bank deposits, trade receivables and derivative instruments. The majority of cash and cash equivalents and short-term deposits of the Company are invested in dollar deposits in major U.S. and Israeli banks. Such investments in the United States may be in excess of insured limits and are not insured in other jurisdictions. Generally, the cash and cash equivalents and short-term bank deposits may be redeemed upon demand, and therefore, bear minimal risk. Marketable securities include investments in dollar linked corporate and municipal bonds. Marketable securities consist of highly liquid debt instruments with high credit standing. The Company’s investment policy, approved by the Board of Directors, limits the amount the Group may invest in any one type of investment or issuer, thereby reducing credit risk concentrations. Management believes that the portfolio is well diversified and, accordingly, minimal credit risk exists with respect to these marketable debt securities The Company's trade receivables are primarily derived from sales to customers located mainly in EMEA, as well as in APAC, Latin America and the United States. Concentration of credit risk with respect to trade receivables is limited by credit limits, ongoing credit evaluation and account monitoring procedures. The Company performs ongoing credit evaluations of its customers and establishes an allowance for doubtful accounts on a specific basis. Allowance for doubtful accounts amounted to $ 1,292 and $ 924 as of December 31, 2017 and 2016, respectively. The Company utilizes foreign currency forward contracts to protect against the risk of overall changes in exchange rates. The derivative instruments hedge a portion of the Company's non-dollar currency exposure. Counterparties to the Company’s derivative instruments are all major financial institutions and its exposure is limited to the amount of any asset resulting from the forward contracts. The Company has no significant off balance sheet concentrations of credit risk.
Grants from the Israel Innovation Authority	s. Grants from the Israel Innovation Authority: Participation grants from the Israel Innovation Authority (Previously known as the Office of the Chief Scientist) for research and development activity are recognized at the time the Company is entitled to such grants on the basis of the costs incurred and included as a deduction of research and development costs. Research and development non royalty bearing grants recognized amounted to $ 392, $ 606 and $ 1,252 in 2017, 2016 and 2015, respectively.
Income taxes	t. Income taxes: The Company accounts for income taxes in accordance with Accounting Standards Codification No. 740, "Income Taxes" ("ASC No. 740"). ASC No. 740 prescribes the use of the liability method, whereby deferred tax asset and liability account balances are determined based on differences between financial reporting and tax bases of assets and liabilities and are measured using the enacted tax rates and laws that will be in effect when the differences are expected to reverse. The Company provides a valuation allowance, if necessary, to reduce deferred tax assets to their estimated realizable value if it is more likely than not that some portion or all of the deferred tax assets will not be realized. The deferred tax assets and liabilities are classified to non-current assets and liabilities, respectively. ASC No. 740 contains a two-step approach to recognizing and measuring a liability for uncertain tax positions. The first step is to evaluate the tax position taken or expected to be taken in a tax return by determining if the weight of available evidence indicates that it is more likely than not that, on an evaluation of the technical merits, the tax position will be sustained on audit, including resolution of any related appeals or litigation processes. The second step is to measure the tax benefit as the largest amount that is more than 50% likely to be realized upon ultimate settlement.
Basic and diluted net income (loss) per share	u. Basic and diluted net income (loss) per share: Basic net income (loss) per share is computed based on the weighted average number of Ordinary Shares outstanding during each year. Diluted net income (loss) per share is computed based on the weighted average number of Ordinary Shares outstanding during each year, plus dilutive potential Ordinary Shares considered outstanding during the year, in accordance with FASB ASC 260 "Earnings Per Share". For the years ended December 31, 2017, 2016 and 2015, all outstanding options and have been excluded from the calculation of the diluted net loss per share since their effect was anti-dilutive.
Comprehensive income (loss)	v. Comprehensive loss: The Company accounts for comprehensive loss in accordance with Accounting Standards Codification No. 220, "Comprehensive Income" ("ASC No. 220"). This statement establishes standards for the reporting and display of comprehensive loss and its components in a full set of general purpose financial statements. Comprehensive loss represents all changes in shareholders' equity during the period except those resulting from investments by, or distributions to shareholders. The Company determined that its items of comprehensive loss relate to unrealized gains and losses on hedging derivative instruments and unrealized gains and losses on available-for-sale marketable securities. The following table shows the components and the effects on net loss of amounts reclassified from accumulated other comprehensive loss as of December 31, 2017: Year ended December 31, 2017 Unrealized losses on marketable securities Unrealized gains (losses) on cash flow hedges Total Balance as of December 31, 2016 $ (88 ) $ (61 ) $ (149 ) Changes in other comprehensive income (loss) before reclassifications (28 ) 1,016 988 Amounts reclassified from accumulated other comprehensive income (loss) to : Cost of revenues - (83 ) (83 ) Operating expenses - (713 ) (713 ) Financial income, net (7 ) - (7 ) Net current-period other comprehensive income (loss) (35 ) 220 185 Balance as of December 31, 2017 $ (123 ) $ 159 $ 36
Fair value of financial instruments	w. Fair value of financial instruments: The Company measures its cash and cash equivalents, marketable securities, derivative instruments, short-term bank deposits, trade receivables, other receivables, trade payables and other payables at fair value. The carrying amounts of short-term bank deposits, trade receivables, other receivables, trade payables and other payables approximate their fair value due to the short-term maturities of such instruments. Fair value is an exit price, representing the amount that would be received if the Company were to sell an asset or paid to transfer a liability in an orderly transaction between market participants. As such, fair value is a market-based measurement that should be determined based on assumptions that market participants would use in pricing an asset or a liability. The Company uses a three-tier value hierarchy, which prioritizes the inputs used in the valuation methodologies in measuring fair value: Level 1 - Observable inputs that reflect quoted prices (unadjusted) for identical assets or liabilities in active markets. Level 2 - Include other inputs that are directly or indirectly observable in the marketplace, other than quoted prices included in Level 1, such as quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets with insufficient volume or infrequent transactions, or other inputs that are observable (model-derived valuations in which significant inputs are observable), or can be derived principally from or corroborated by observable market data; and Level 3 - Unobservable inputs which are supported by little or no market activity. The Company categorized each of its fair value measurements in one of those three levels of hierarchy. The fair value hierarchy also requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The Company's earn-out consideration is classified within Level 3. The valuation methodology used by the Company to calculate the fair value consideration is the discounted cash flow using Monte-Carlo simulation method by taking into account, forecast future revenues, expected volatility of 41.1% and weighted average cost of debt of 2%.
Derivatives and hedging	x. Derivatives and hedging: The Company accounts for derivatives and hedging based on Accounting Standards Codification No. 815, "Derivatives and Hedging" ("ASC No. 815"). The Company accounts for its derivative instruments as either assets or liabilities and carries them at fair value. Derivative instruments that are not designated and qualified as hedging instruments must be adjusted to fair value through earnings. For derivative instruments that hedge the exposure to variability in expected future cash flows that are designated as cash flow hedges, the effective portion of the gain or loss on the derivative instrument is reported as a component of accumulated other comprehensive income (loss) in shareholders' equity and reclassified into earnings in the same period or periods during which the hedged transaction affects earnings. The ineffective portion of the gain or loss on the derivative instrument is recognized in current earnings. To apply hedge accounting treatment, cash flow hedges must be highly effective in offsetting changes to expected future cash flows on hedged transactions.
Business combinations	y. Business combinations: The Company accounts for business combinations in accordance with ASC No. 805. ASC No. 805 requires recognition of assets acquired, liabilities assumed, and any non-controlling interest at the acquisition date, measured at their fair values as of that date. Any excess of the fair value of net assets acquired over the purchase price is recorded as goodwill and any subsequent changes in estimated contingencies are to be recorded in earnings. In addition, changes in valuation allowance related to acquired deferred tax assets and acquired income tax positions are to be recognized in earnings.
Warranty costs	z. Warranty costs: The Company generally provides three months software and a one year hardware warranty for all of its products. A provision is recorded for estimated warranty costs at the time revenues are recognized based on the Company's experience. Warranty expenses for the years
Recently Issued Accounting Pronouncement	aa. Recently Issued Accounting Pronouncements: In January 2016, the FASB issued a new standard to amend certain aspects of recognition, measurement, presentation, and disclosure of financial instruments. Most prominent among the amendments is the requirement for changes in the fair value of our equity investments, with certain exceptions, to be recognized through net income rather than accumulated other comprehensive income (loss). ASU 2016-01 is effective for annual reporting periods, and interim periods within those years beginning after December 15, 2017. This new guidance doesn’t have a material impact on the Company’s Consolidated Financial Statements. In February 2016, the FASB issued ASU 2016-02, “Leases”, on the recognition, measurement, presentation and disclosure of leases for both parties to a contract (i.e., lessees and lessors). The new standard requires lessees to apply a dual approach, classifying leases as either finance or operating leases based on the principle of whether or not the lease is effectively a financed purchase by the lessee. This classification will determine whether lease expense is recognized based on an effective interest method or on a straight line basis over the term of the lease, respectively. A lessee is also required to record a right-of-use asset and a lease liability for all leases with a term of greater than 12 months regardless of their classification. Leases with a term of 12 months or less will be accounted for in a manner similar to the accounting under existing guidance for operating leases today. The new standard requires lessors to account for leases using an approach that is substantially equivalent to existing guidance for sales-type leases, direct financing leases and operating leases. ASC 842 supersedes the previous leases standard, ASC 840, "Leases". The guidance is effective for the interim and annual periods beginning on or after December 15, 2018, and early adoption is permitted. The Company is currently in the process of evaluating the impact of the adoption of ASU 2016-02 on its consolidated financial statements. In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments” (“ASU 2016-13”). The standard changes the methodology for measuring credit losses on financial instruments and the timing of when such losses are recorded. ASU 2016-13 is effective for fiscal years, and interim periods within those years, beginning after December 15, 2019. Early adoption is permitted for fiscal years, and interim periods within those years, beginning after December 15, 2018. The Company is currently evaluating the impact of this standard on its Consolidated Financial Statements. In November 2016, the FASB issued Accounting Standards Update No. 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash (ASU 2016-18), which requires companies to include amounts generally described as restricted cash and restricted cash equivalents in cash and cash equivalents when reconciling beginning-of-period and end-of-period total amounts shown on the statement of cash flows. The amendments in this Update are effective for public business entities for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. Early adoption is permitted, including adoption in an interim period. This new guidance doesn't have a material impact on the Company’s Consolidated Financial Statements. In January 2017, the FASB issued ASU 2017-04, “Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment" ("ASU 2017-04"). ASU 2017-04 eliminates the requirement to measure the implied fair value of goodwill by assigning the fair value of a reporting unit to all assets and liabilities within that unit (the "Step 2 test") from the goodwill impairment test. Instead, if the carrying amount of a reporting unit exceeds its fair value, an impairment loss is recognized in an amount equal to that excess, limited by the amount of goodwill in that reporting unit. ASU 2017-04 will become effective for the Company beginning January 1, 2020 and must be applied to any annual or interim goodwill impairment assessments after that date. Early adoption is permitted. The Company is currently evaluating the effect that the adoption of ASU 2017-04 will have on its consolidated financial statements. In May 2017, the FASB issued ASU 2017-09, Stock Compensation – Scope of Modification Accounting, guidance that clarifies that all changes to share-based payment awards are not necessarily accounted for as a modification. Under the new guidance, modification accounting is required only if the fair value, the vesting conditions, or the classification of the award changes as a result of the change in terms or conditions. This guidance is effective prospectively beginning January 1, 2018. This guidance will apply to any future modifications. The Company does not expect this guidance to have a material impact on our consolidated financial statements. In August 2017, the FASB issued ASU No. 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities. The objectives of this ASU are to improve the financial reporting of hedging relationships to better portray the economic results of an entity's risk management activities in its financial statements and to make certain targeted improvements to simplify the application of the hedge accounting guidance in current GAAP. This ASU is effective for fiscal years beginning after December 15, 2018 and interim periods within those fiscal years. The Company is currently evaluating the effect of the adoption of this ASU. In May 2014, the Financial Accounting Standards Board (FASB) issued ASU No. 2014-09, “Revenue from Contracts with Customers”, an updated standard on revenue recognition and issued subsequent amendments to the initial guidance in March 2016, April 2016, May 2016 and December 2016 within ASU 2016-08, 2016-10, 2016-12 and 2016-20, respectively. The new standards provide enhancements to the quality and consistency of how revenue is reported while also improving comparability in the financial statements of companies reporting using IFRS and US GAAP. The core principle of the new standard is for companies to recognize revenue to depict the transfer of goods or services to customers in amounts that reflect the consideration (that is, payment) to which the company expects to be entitled in exchange for those goods or services. The new standard also will result in enhanced disclosures about revenue, provide guidance for transactions that were not previously addressed comprehensively (for example, service revenue and contract modifications) and improve guidance for multiple-element arrangements. ASU 2014-09 was initially scheduled to be effective for annual and interim reporting periods beginning after December 15, 2016 and may be adopted either on a full retrospective or modified retrospective approach. However, on July 9, 2015, the FASB approved a one year deferral of the effective date of ASU 2014-09. The revised effective date is for annual reporting periods beginning after December 15, 2017 and interim periods thereafter, with an early adoption permitted as of the original effective date. The Company has decided to adopt this standard effective January 1, 2018 using the modified retrospective approach with cumulative effect of applying the new guidance recognized as an adjustment to the opening retained earnings balance, which is $712. In preparation for adoption of the standard, the Company has implemented internal controls and key system functionality to enable the preparation of financial information and have reached conclusions on key accounting assessments related to the standard, including the assessment of the impact. The most significant impact of the new standard relates to the way the Company accounts for term-based license at the point in time when control transfers Adoption of the standard will result in a reduction of deferred revenues of $712 as of January 1, 2018 to be recorded in accumulated deficit due to upfront recognition of license revenues from term licenses.

GENERAL (Tables)

GENERAL (Tables)	12 Months Ended
	Dec. 31, 2017
Business Acquisition [Line Items]
Schedule of pro forma revenue and net loss	The following table summarizes the estimated fair values of the assets acquired and liabilities assumed at the acquisition date: Fair value Current assets $ 54 Equipment 152 Deferred revenues (155 ) Current and non-current liabilities (103 ) Technology 4,032 Customer relationships 2,824 Backlog 386 Goodwill 10,748 Net assets acquired $ 17,938
Optenet SA [Member]
Business Acquisition [Line Items]
Schedule of the Fair Value of Assets Acquired and Liabilities Assumed	The following represents the unaudited consolidated pro forma revenue and net loss for the years ended December 31, 2015, to give effect to the acquisition of Optenet as if it had occurred on January 1, 2015. The pro forma information is not necessarily indicative of the results of operations that would have been had the acquisition actually occurred on January 1, 2015, nor does it purport to represent the results of operations for future periods. Year ended December 31, 2015 Unaudited Revenues $ 100,683 Net loss $ (21,177 )

SIGNIFICANT ACCOUNTING POLICI28

SIGNIFICANT ACCOUNTING POLICIES (Tables)	12 Months Ended
	Dec. 31, 2017
Accounting Policies [Abstract]
Schedule of Estimated Useful Lives at an Annual Rate	Property and equipment are stated at cost, net of accumulated depreciation. Depreciation is calculated by the straight-line method over the estimated useful lives of the assets at the following annual rates: % Lab equipment 16 - 25 Computers and peripheral equipment 33 Office furniture 6 Leasehold improvements Over the shorter of the term of the lease or the useful life of the asset
Schedule of Stock-Based Compensation Expense	The following table sets forth the total stock-based compensation expense resulting from stock options and restricted share units ("RSUs") Year ended December 31, 2017 2016 2015 Cost of revenues $ 362 $ 367 $ 324 Research and development 648 1,240 1,637 Sales and marketing 1,166 1,833 2,802 General and administrative 1,190 1,701 2,407 Total stock-based compensation expense $ 3,366 $ 5,141 $ 7,170
Schedule of Stock-Based Compensation Assumptions	The Company selected the binomial option pricing model as the most appropriate fair value method for its stock-based compensation awards with the following assumptions for the years ended December 31, 2017, 2016 and 2015: Year ended December 31, 2017 2016 2015 Suboptimal exercise multiple 2.9-3.5 2.9-3.5 3 Risk free interest rate 0.80%-2.20 % 0.47%-1.58 % 0.23%-2.35 % Volatility 27%-49 % 33%-51 % 37%-55 % Dividend yield 0 % 0 % 0 %
Schedule of Accumulated Other Comprehensive Income	The following table shows the components and the effects on net loss of amounts reclassified from accumulated other comprehensive loss as of December 31, 2017: Year ended December 31, 2017 Unrealized losses on marketable securities Unrealized gains (losses) on cash flow hedges Total Balance as of December 31, 2016 $ (88 ) $ (61 ) $ (149 ) Changes in other comprehensive income (loss) before reclassifications (28 ) 1,016 988 Amounts reclassified from accumulated other comprehensive income (loss) to : Cost of revenues - (83 ) (83 ) Operating expenses - (713 ) (713 ) Financial income, net (7 ) - (7 ) Net current-period other comprehensive income (loss) (35 ) 220 185 Balance as of December 31, 2017 $ (123 ) $ 159 $ 36

AVAILABLE-FOR-SALE MARKETABLE29

AVAILABLE-FOR-SALE MARKETABLE SECURITIES (Tables)	12 Months Ended
	Dec. 31, 2017
Investments, Debt and Equity Securities [Abstract]
Summary of Available-for-Sale Marketable Securities	The following is a summary of available-for-sale marketable securities: December 31, 2017 December 31, 2016 Amortized cost Gross unrealized gain Gross unrealized Fair value Amortized cost Gross unrealized Gross unrealized Fair value Available-for-sale - matures within one year: Governmental debentures $ 573 $ 20 $ (1 ) $ 592 $ 339 $ - $ - $ 339 Corporate debentures 24,619 8 (22 ) 24,605 19,693 31 (14 ) 19,710 25,192 28 (23 ) 25,197 20,032 31 (14 ) 20,049 Available-for-sale - matures after one year through three years: Governmental debentures 108 - (1 ) 107 - - - - Corporate debentures 37,812 64 (187 ) 37,689 34,472 70 (78 ) 34,464 37,920 64 (188 ) 37,796 34,472 70 (78 ) 34,464 Available-for-sale - matures after three years through five years: Governmental debentures - - - - 100 - - 100 Corporate debentures 205 - (4 ) 201 5,991 2 (99 ) 5,894 205 - (4 ) 201 6,091 2 (99 ) 5,994 $ 63,317 $ 92 $ (215 ) $ 63,194 $ 60,595 $ 103 $ (191 ) $ 60,507

FAIR VALUE MEASUREMENTS (Tables

FAIR VALUE MEASUREMENTS (Tables)	12 Months Ended
	Dec. 31, 2017
Fair Value Disclosures [Abstract]
Schedule of Financial Assets Measured at Fair Value on a Recurring Basis	The Company's financial net assets measured at fair value on a recurring basis, including accrued interest components, consisted of the following types of instruments as of December 31, 2017 and 2016, respectively: As of December 31, 2017 Fair value measurements using input type Level 1 Level 2 Level 3 Total Available-for-sale marketable securities $ - $ 63,194 $ - $ 63,194 Foreign currency derivative contracts - 18 - 18 Earn-out liability - - (5,267 ) (5,267 ) Total financial net assets $ - $ 63,212 $ (5,267 ) $ 57,945 As of December 31, 2016 Fair value measurements using input type Level 1 Level 2 Level 3 Total Available-for-sale marketable securities $ - $ 60,507 $ - $ 60,507 Foreign currency derivative contracts - 28 - 28 Earn-out liability - - (4,504 ) (4,504 ) Total financial net assets $ - $ 60,535 $ (4,504 ) $ 56,031
Schedule of Fair Value Measurements Using Significant Unobservable Inputs	Fair value measurements using significant unobservable inputs (Level 3): Balance at January 1, 2017 $ 4,504 Earn Out liability adjustments due to exchange rates 585 Adjustment due to change in the forecast of earn-out consideration 178 Balance at December 31, 2017 $ 5,267

DERIVATIVE INSTRUMENTS (Tables)

DERIVATIVE INSTRUMENTS (Tables)	12 Months Ended
	Dec. 31, 2017
Designated as Hedging Instrument [Member]
Schedule of the Fair Value of Open Foreign Exchange Contracts	The fair value of the outstanding foreign exchange contracts recorded by the Company on its consolidated balance sheets as of December 31, 2017 and 2016, as assets and liabilities is as follows: Foreign exchange forward and December 31, options contracts Balance sheet 2017 2016 Fair value of foreign exchange hedge transactions Other receivables and prepaid expenses $ 160 $ 40 Fair value of foreign exchange hedge transactions Other payables and accrued expenses (1 ) (101 ) Total derivatives designated as hedging instruments Other Comprehensive income (loss) $ 159 $ (61 )
Not Designated as Hedging Instrument [Member]
Schedule of the Fair Value of Open Foreign Exchange Contracts	The fair value of the outstanding non-designated foreign exchange contracts recorded by the Company on its consolidated balance sheets as of December 31, 2017 and 2016, as assets and liabilities is as follows: Foreign exchange forward and December 31, options contracts Balance sheet 2017 2016 Fair value of foreign exchange non-designated hedge transactions Other receivables and prepaid expenses $ 6 $ 181 Fair value of foreign exchange non-designated hedge transactions Other payables and accrued expenses (147 ) (92 ) Total derivatives designated as hedging instruments (141 ) $ 89

OTHER RECEIVABLES AND PREPAID32

OTHER RECEIVABLES AND PREPAID EXPENSES (Tables)	12 Months Ended
	Dec. 31, 2017
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Schedule of Other Accounts Receivable and Prepaid Expenses	December 31, 2017 2016 Prepaid expenses $ 1,172 $ 1,739 Government authorities 919 1,003 Foreign currency derivative contracts 166 221 Short-term lease deposits 145 127 Receivable from third-party - 426 Others 247 363 $ 2,649 $ 3,879

INVENTORIES (Tables)

INVENTORIES (Tables)	12 Months Ended
	Dec. 31, 2017
Inventory Disclosure [Abstract]
Schedule of Inventory	December 31, 2017 2016 Raw materials $ 1,684 $ 1,257 Finished goods 6,213 5,978 $ 7,897 $ 7,235

PROPERTY AND EQUIPMENT, NET (Ta

PROPERTY AND EQUIPMENT, NET (Tables)	12 Months Ended
	Dec. 31, 2017
Property, Plant and Equipment [Abstract]
Schedule of Property and Equipment	December 31, 2017 2016 Cost: Lab equipment $ 14,613 $ 13,225 Computers and peripheral equipment 19,430 18,704 Office furniture and equipment 1,071 975 Leasehold improvements 1,809 1,238 36,923 34,142 Accumulated depreciation: Lab equipment 12,066 10,788 Computers and peripheral equipment 18,430 17,750 Office furniture and equipment 550 521 Leasehold improvements 875 696 31,921 29,755 Depreciated cost $ 5,002 $ 4,387

INTANGIBLE ASSETS, NET (Tables)

INTANGIBLE ASSETS, NET (Tables)	12 Months Ended
	Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Intangible Assets	The following table shows the Company's intangible assets for the periods presented: Useful life December 31, (Years) 2017 2016 Original Cost: Technology 3.8 $ 9,111 $ 9,111 Backlog 2.8 1,877 1,877 Customer relationships 4.4 3,592 3,592 $ 14,580 $ 14,580 Accumulated amortization: Technology $ 7,633 $ 6,705 Backlog 1,877 1,867 Customer relationships 2,137 1,598 $ 11,647 $ 10,170 Amortized cost $ 2,933 $ 4,410
Schedule of Estimated Amortization Expense	Estimated amortization expense for the years ending: Year ending December 31, 2018 1,630 2019 1,303 Total 2,933

OTHER PAYABLES AND ACCRUED EX36

OTHER PAYABLES AND ACCRUED EXPENSES (Tables)	12 Months Ended
	Dec. 31, 2017
Payables and Accruals [Abstract]
Schedule of Other Payables and Accrued Expenses	December 31, 2017 2016 Accrued expenses $ 3,011 $ 2,255 Accrued taxes 2,311 416 Foreign currency derivative contracts 148 193 Advances from customers 17 23 Others 255 270 $ 5,742 $ 3,157

COMMITMENTS AND CONTINGENT LI37

COMMITMENTS AND CONTINGENT LIABILITIES (Tables)	12 Months Ended
	Dec. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Schedule of Future Minimum Lease Obligations	As of December 31, 2017, the aggregate future minimum lease obligations (offices and motor vehicles) under non-cancelable operating leases agreements were as follows: Year ending December 31, 2018 $ 2,403 2019 1,610 2020 844 2021 300 2022 75 Total $ 5,232

SHAREHOLDERS' EQUITY (Tables)

SHAREHOLDERS' EQUITY (Tables)	12 Months Ended
	Dec. 31, 2017
Stockholders' Equity Note [Abstract]
Schedule of Stock Option Activity	A summary of the Company's stock option activity, pertaining to its option plans for employees and related information is as follows: Year ended December 31, 2017 2016 2015 Number of shares upon exercise Weighted average exercise price Number of shares upon exercise Weighted average exercise price Number of shares upon exercise Weighted average exercise price Outstanding at beginning of year 1,959,014 $ 8.24 2,811,966 $ 10.70 2,531,381 $ 11.99 Granted 676,550 $ 4.93 643,697 $ 4.99 704,348 $ 6.73 Forfeited (346,750 ) $ 7.01 (1,358,492 ) $ 12.41 (320,496 ) $ 15.13 Exercised (99,517 ) $ 3.56 (138,157 ) $ 1.75 (103,267 ) $ 1.28 Outstanding at end of year 2,189,297 $ 7.63 1,959,014 $ 8.24 2,811,966 $ 10.70 Exercisable at end of year 1,274,649 $ 9.26 1,072,658 $ 9.87 1,646,204 $ 11.99 Vested and expected to vest 1,607,782 $ 8.44 1,407,930 $ 9.04 2,197,848 $ 11.16
Schedule of Stock Options Outstanding	The options outstanding as of December 31, 2017, have been classified by exercise price, as follows: Exercise price Shares upon exercise of options outstanding as of December 31, 2017 Weighted average remaining contractual life Shares upon exercise of options exercisable as of December 31, 2017 Years $ 23.31-27.58 73,000 4.62 73,000 $ 15.20-17.07 112,748 3.70 111,618 $ 10.16-14.68 337,750 5.69 312,866 $ 5.01-9.13 654,474 4.31 438,662 $ 0.03-4.95 1,011,325 6.35 338,503 2,189,297 1,274,649
Summary of Restricted Stock Unit Activity	The following provides a summary of the restricted stock unit activity for the Company for the two years ended December 31, 2017: Year ended December 31, 2017 2016 Number of shares upon exercise Weighted average share price Number of shares upon exercise Weighted average share price Outstanding at beginning of year 592,126 $ 6.53 359,404 $ 10.95 Granted 612,173 $ 5.00 531,570 $ 4.59 Vested (326,026 ) $ 6.48 (152,460 ) $ 10.08 Forfeited (165,183 ) $ 6.04 (146,388 ) $ 6.85 Unvested at end of year 713,090 $ 6.04 592,126 $ 6.53

TAXES ON INCOME (Tables)

TAXES ON INCOME (Tables)	12 Months Ended
	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Schedule of Pre-tax Income (Loss)	Pre-tax income (loss) is comprised as follows: Year ended December 31, 2017 2016 2015 Domestic $ (17,539 ) $ (7,033 ) $ (16,898 ) Foreign 1,031 1,243 412 $ (16,508 ) $ (5,790 ) $ (16,486 )
Schedule of the Reconciliation of the Theoretical Tax Expenses	A reconciliation of the theoretical tax expenses, assuming all income is taxed at the statutory tax rate applicable to the income of the Company and the actual tax expenses is as follows: Year ended December 31, 2017 2016 2015 Loss before taxes on income $ (16,508 ) $ (5,790 ) $ (16,486 ) Theoretical tax income computed at the Israeli statutory tax rate (24%, 25% and 26.5% for the years 2017, 2016 and 2015, respectively) $ (3,962 ) $ (1,448 ) $ (4,369 ) Changes in valuation allowance 8,946 (469 ) 3,716 Increase (decrease) in losses and temporary differences due to change in Israeli corporate and “Approved Enterprise" tax (5,376 ) (216 ) 679 Write off of prepaid and withholding taxes 909 1,759 1,150 Foreign tax rates differences related to subsidiaries (48 ) 576 103 Non-deductible expenses and other 684 567 181 Non-deductible share-based compensation expense 411 1,435 1,896 Actual tax expense $ 1,564 $ 2,204 $ 3,356
Schedule of Income Tax Expense	Income tax expense is comprised as follows: Year ended December 31, 2017 2016 2015 Current taxes $ 689 $ 211 $ 146 Deferred taxes (benefit) ( 34 ) 234 2,060 Write off of prepaid and withholding taxes 909 1,759 1,150 $ 1,564 $ 2,204 $ 3,356
Schedule of Deferred Income Taxes	Deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. Significant components of the Company's deferred income taxes are as follows: December 31, 2017 2016 Deferred tax assets: Operating and capital loss carryforwards $ 20,102 $ 12,900 Reserves and allowances 3,800 2,022 Deferred tax asset before valuation allowance 23,902 14,922 Valuation allowance (23,601 ) (14,655 ) Net deferred tax asset 301 267 Deferred tax liability - - Net deferred tax asset $ 301 $ 267

GEOGRAPHIC INFORMATION (Tables)

GEOGRAPHIC INFORMATION (Tables)	12 Months Ended
	Dec. 31, 2017
Segment Reporting [Abstract]
Schedule of Revenues by Geographic Location	Allot operates in a single reportable segment. Revenues are based on the location of the Company's channel partners which are considered as end customers, as well as direct customers of the Company: Year ended December 31, 2017 2016 2015 Europe $ 40,394 $ 34,279 $ 39,110 Asia and Oceania 13,936 27,700 28,495 Americas 15,532 16,025 22,553 Middle East and Africa 12,130 12,365 9,809 $ 81,992 $ 90,369 $ 99,967
Schedule of Major Customers	The following are the Company’s major customers: Year ended December 31, 2017 2016 2015 Customer A 32 % 25 % 27 % Customer B - 17 % - Customer C - - 10 % 32 % 42 % 37 %
Schedule of Long-Lived Assets by Geographic Location	The following presents total long-lived assets as of December 31, 2017 and 2016: December 31, 2017 2016 Long-lived assets: Israel $ 4,741 $ 4,156 United States 14 42 Other 247 189 $ 5,002 $ 4,387

FINANCIAL INCOME (EXPENSES), 41

FINANCIAL INCOME (EXPENSES), NET (Tables)	12 Months Ended
	Dec. 31, 2017
Other Income and Expenses [Abstract]
Schedule of Financial Income, Net	Year ended December 31, 2017 2016 2015 Financial income (expenses): Interest income $ 2,513 $ 2,466 $ 2,174 Financial expenses: Exchange rate differences and other 602 186 1,480 Amortization/accretion of premium/discount on marketable securities, net 1,017 1,221 1,278 $ 894 $ 1,059 $ (584 )

EARNINGS PER SHARE (Tables)

EARNINGS PER SHARE (Tables)	12 Months Ended
	Dec. 31, 2017
Net loss per share:
Schedule of the Computation of Basic and Diluted Net Earnings (Loss) per Share	The following table sets forth the computation of basic and diluted net loss per share: Year ended December 31, 2017 2016 2015 Numerator: Net loss $ (18,072 ) $ (7,994 ) $ (19,842 ) Denominator: Weighted average number of shares outstanding used in computing basic and 33,253,158 33,202,309 33,419,917 Basic and diluted net loss per share $ (0.54 ) $ (0.24 ) $ (0.59 )
Summary of numbers of shares were excluded from the computation of diluted net loss per ordinary	The following numbers of shares were excluded from the computation of diluted net loss per ordinary share for the periods presented because including them would have had an anti-dilutive effect: Year ended December 31, 2017 2016 2015 Ordinary shares 2,166,782 2,000,757 3,424,891

GENERAL (Narrative) (Details)

GENERAL (Narrative) (Details) - USD ($) $ in Thousands	Mar. 23, 2015	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Business Acquisition [Line Items]
Cash paid to acquire entity				$ 9,859
Acquisition transaction costs		$ 397
Backlog [Member]
Business Acquisition [Line Items]
Weighted average remaining useful life		2 years 9 months 18 days
Customer Relationships [Member]
Business Acquisition [Line Items]
Weighted average remaining useful life		4 years 4 months 24 days
Optenet SA [Member]
Business Acquisition [Line Items]
Acquisition date	Mar. 23, 2015
Cash paid to acquire entity	$ 9,859
Total purchase consideration	17,938
Fair value of contingent liability	$ 8,079	$ 5,267	$ 4,504
Payment term for contingent consideration	5 years
Optenet SA [Member] | Technology [Member]
Business Acquisition [Line Items]
Weighted average remaining useful life		4 years 4 months 2 days
Optenet SA [Member] | Backlog [Member]
Business Acquisition [Line Items]
Weighted average remaining useful life		2 years 9 months 18 days
Optenet SA [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Weighted average remaining useful life		4 years 9 months 18 days
Optenet [Member]
Business Acquisition [Line Items]
Contingent consideration payments cap based on achievement of certain thresholds of revenues		$ 27,500

GENERAL (Schedule of Estimated

GENERAL (Schedule of Estimated Fair Values of Assets Acquired and Liabilities Assumed) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Mar. 23, 2015
Business Acquisition [Line Items]
Goodwill	$ 31,562	$ 31,562
Optenet SA [Member]
Business Acquisition [Line Items]
Current assets			$ 54
Equipment			152
Deferred revenues			(155)
Current and non-current liabilities			(103)
Goodwill			10,748
Net assets acquired			17,938
Optenet SA [Member] | Technology [Member]
Business Acquisition [Line Items]
Intangible assets			4,032
Optenet SA [Member] | Backlog [Member]
Business Acquisition [Line Items]
Intangible assets			386
Optenet SA [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Intangible assets			$ 2,824

GENERAL (Schedule of pro forma

GENERAL (Schedule of pro forma revenue and net loss) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2015USD ($)
Unaudited pro forma condensed results of operations
Revenues	$ 100,683
Net loss	$ (21,177)

SIGNIFICANT ACCOUNTING POLICI46

SIGNIFICANT ACCOUNTING POLICIES (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Accounting Policies [Abstract]
Short-term deposits, weighted average interest rate	1.63%	1.37%
Short-term bank deposits due to hedging transacations	$ 2,581	$ 2,553
Inventory write-offs	1,260	1,004	$ 775
Cumulative inventory write-off	2,756	1,957
Impairment of intangible assets			5,777
Reserve for sales returns	686	910
Advertising expenses	1,236	1,081	1,201
Severance expense	$ 1,801	$ 1,976	$ 2,286
Annual post-vesting forfeiture rate	29.00%	29.00%	29.00%
Annual pre-vesting forfeiture rate	34.00%	34.00%	34.00%
Allowance for doubtful accounts	$ 1,292	$ 924
Grants participations excluded from research and development costs	$ 392	$ 606	$ 1,252
Expected volatility	41.10%
Weighted average cost of debt	2.00%
Changes in deferred revenue	$ 712

SIGNIFICANT ACCOUNTING POLICI47

SIGNIFICANT ACCOUNTING POLICIES (Schedule of Estimated Useful Lives at Annual Rates) (Details)	12 Months Ended
	Dec. 31, 2017
Lab equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives, annual rate	16.00%
Lab equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives, annual rate	25.00%
Computers and peripheral equipment [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives, annual rate	33.00%
Office furniture and equipment [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives, annual rate	6.00%
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	Over the shorter of the term of the lease or the useful life of the asset

SIGNIFICANT ACCOUNTING POLICI48

SIGNIFICANT ACCOUNTING POLICIES (Schedule of Stock-Based Compensation Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense	$ 3,366	$ 5,141	$ 7,170
Cost of revenues [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense	362	367	324
Research and development [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense	648	1,240	1,637
Sales and marketing [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense	1,166	1,833	2,802
General and administrative [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense	$ 1,190	$ 1,701	$ 2,407

SIGNIFICANT ACCOUNTING POLICI49

SIGNIFICANT ACCOUNTING POLICIES (Schedule of Stock-Based Compensation Assumptions) (Details)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Accounting Policies [Abstract]
Suboptimal exercise multiple			3
Suboptimal exercise multiple, minimum	2.9	2.9
Suboptimal exercise multiple, maximum	3.5	3.5
Risk free interest rate, minimum	0.80%	0.47%	0.23%
Risk free interest rate, maximum	2.20%	1.58%	2.35%
Volatility, minimum	27.00%	33.00%	37.00%
Volatility, maximum	49.00%	51.00%	55.00%
Dividend yield	0.00%	0.00%	0.00%

SIGNIFICANT ACCOUNTING POLICI50

SIGNIFICANT ACCOUNTING POLICIES (Schedule of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	$ (149)	$ (470)
Changes in other comprehensive income (loss) before reclassifications	988
Amounts reclassified from accumulated other comprehensive income (loss) to :
Net current-period other comprehensive income (loss)	185	321	$ 1,150
Balance	36	(149)	$ (470)
Cost of revenues [Member]
Amounts reclassified from accumulated other comprehensive income (loss) to :
Amounts reclassified from accumulated other comprehensive income	(83)
Operating expenses [Member]
Amounts reclassified from accumulated other comprehensive income (loss) to :
Amounts reclassified from accumulated other comprehensive income	(713)
Financial income, net [Member]
Amounts reclassified from accumulated other comprehensive income (loss) to :
Amounts reclassified from accumulated other comprehensive income	(7)
Unrealized gains (losses) on marketable securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(88)
Changes in other comprehensive income (loss) before reclassifications	(28)
Amounts reclassified from accumulated other comprehensive income (loss) to :
Net current-period other comprehensive income (loss)	(35)
Balance	(123)	(88)
Unrealized gains (losses) on marketable securities [Member] | Cost of revenues [Member]
Amounts reclassified from accumulated other comprehensive income (loss) to :
Amounts reclassified from accumulated other comprehensive income
Unrealized gains (losses) on marketable securities [Member] | Operating expenses [Member]
Amounts reclassified from accumulated other comprehensive income (loss) to :
Amounts reclassified from accumulated other comprehensive income
Unrealized gains (losses) on marketable securities [Member] | Financial income, net [Member]
Amounts reclassified from accumulated other comprehensive income (loss) to :
Amounts reclassified from accumulated other comprehensive income	(7)
Unrealized gains (losses) on cash flow hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(61)
Changes in other comprehensive income (loss) before reclassifications	1,016
Amounts reclassified from accumulated other comprehensive income (loss) to :
Net current-period other comprehensive income (loss)	220
Balance	159	$ (61)
Unrealized gains (losses) on cash flow hedges [Member] | Cost of revenues [Member]
Amounts reclassified from accumulated other comprehensive income (loss) to :
Amounts reclassified from accumulated other comprehensive income	(83)
Unrealized gains (losses) on cash flow hedges [Member] | Operating expenses [Member]
Amounts reclassified from accumulated other comprehensive income (loss) to :
Amounts reclassified from accumulated other comprehensive income	(713)
Unrealized gains (losses) on cash flow hedges [Member] | Financial income, net [Member]
Amounts reclassified from accumulated other comprehensive income (loss) to :
Amounts reclassified from accumulated other comprehensive income

AVAILABLE-FOR-SALE MARKETABLE51

AVAILABLE-FOR-SALE MARKETABLE SECURITIES (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	$ 63,317	$ 60,595
Gross unrealized gain	92	103
Gross unrealized loss	(215)	(191)
Fair value	63,194	60,507
Available-for-sale securities matures within one year [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	25,192	20,032
Gross unrealized gain	28	31
Gross unrealized loss	(23)	(14)
Fair value	25,197	20,049
Available-for-sale securities matures after one year through three years [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	37,920	34,472
Gross unrealized gain	64	70
Gross unrealized loss	(188)	(78)
Fair value	37,796	34,464
Available-for-sale securities matures after three year through five years [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	205	6,091
Gross unrealized gain		2
Gross unrealized loss	(4)	(99)
Fair value	201	5,994
Governmental debentures [Member] | Available-for-sale securities matures within one year [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	573	339
Gross unrealized gain	20
Gross unrealized loss	(1)
Fair value	592	339
Governmental debentures [Member] | Available-for-sale securities matures after one year through three years [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	108
Gross unrealized gain
Gross unrealized loss	(1)
Fair value	107
Governmental debentures [Member] | Available-for-sale securities matures after three year through five years [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost		100
Gross unrealized gain
Gross unrealized loss
Fair value		100
Corporate debentures [Member] | Available-for-sale securities matures within one year [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	24,619	19,693
Gross unrealized gain	8	31
Gross unrealized loss	(22)	(14)
Fair value	24,605	19,710
Corporate debentures [Member] | Available-for-sale securities matures after one year through three years [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	37,812	34,472
Gross unrealized gain	64	70
Gross unrealized loss	(187)	(78)
Fair value	37,689	34,464
Corporate debentures [Member] | Available-for-sale securities matures after three year through five years [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	205	5,991
Gross unrealized gain		2
Gross unrealized loss	(4)	(99)
Fair value	$ 201	$ 5,894

FAIR VALUE MEASUREMENTS (Schedu

FAIR VALUE MEASUREMENTS (Schedule of Financial Assets Measured at Fair Value on a Recurring Basis) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale marketable securities	$ 63,194	$ 60,507
Foreign currency derivative contracts	18	28
Earn-out liability	(5,267)	(4,504)
Total financial assets	57,945	56,031
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale marketable securities
Foreign currency derivative contracts
Earn-out liability
Total financial assets
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale marketable securities	63,194	60,507
Foreign currency derivative contracts	18	28
Earn-out liability
Total financial assets	63,212	60,535
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale marketable securities
Foreign currency derivative contracts
Earn-out liability	(5,267)	(4,504)
Total financial assets	$ (5,267)	$ (4,504)

FAIR VALUE MEASUREMENTS (Sche53

FAIR VALUE MEASUREMENTS (Schedule of Fair value measurements using significant unobservable inputs) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2017USD ($)
Fair Value Measurements Schedule Of Fair Value Measurements Using Significant Unobservable Inputs Details
Balance at January 1, 2017	$ 4,504
Earn Out liability payments, settlements and adjustments due to exchange rates	585
Adjustment due to change in the forecast of earn-out consideration	178
Balance at December 31, 2017	$ 5,267

DERIVATIVE INSTRUMENTS (Narrati

DERIVATIVE INSTRUMENTS (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Net losses recognized from currency transactions	$ (1,801)	$ 286	$ 1,200
Unrealized gain (loss) on forward contracts, net	159	(61)	(45)
Outstanding hedge transactions	14,994	13,302
Non-designated hedge transactions	24,593	14,969
Gain (loss) on derivative instruments reclassified from OCI to operating expenses	(796)	(242)	$ 1,407
Changes in fair value of derivatives not designated as hedging instrument	$ (141)	$ 89

DERIVATIVE INSTRUMENTS (Schedul

DERIVATIVE INSTRUMENTS (Schedule of the Fair Value Open Foreign Exchange Contracts) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Fair value of foreign exchange hedge transactions	$ 160	$ 40
Fair value of foreign exchange hedge transactions	(1)	(101)
Total derivatives designated as hedging instruments	$ 159	$ (61)

DERIVATIVE INSTRUMENTS (Sched56

DERIVATIVE INSTRUMENTS (Schedule of the Fair value of the outstanding non-designated foreign exchange contracts) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Derivative Instruments Schedule Of Fair Value Of Outstanding Non-designated Foreign Exchange Contracts Details
Fair value of foreign exchange non-designated hedge transactions	$ 6	$ 181
Fair value of foreign exchange non-designated hedge transactions	(147)	(92)
Total derivatives designated as hedging instruments	$ (141)	$ 89

OTHER RECEIVABLES AND PREPAID57

OTHER RECEIVABLES AND PREPAID EXPENSES (Schedule of Other Accounts Receivable and Prepaid Expenses) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Prepaid expenses	$ 1,172	$ 1,739
Government authorities	919	1,003
Short-term lease deposits	145	127
Receivable from third-party		426
Others	247	363
Other receivables and prepaid expenses	2,649	3,879
Foreign Exchange Contract [Member]
Foreign currency derivative contracts	$ 166	$ 221

INVENTORIES (Details)

INVENTORIES (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Inventory Disclosure [Abstract]
Raw materials	$ 1,684	$ 1,257
Finished goods	6,213	5,978
Total inventory	7,897	7,235
Cost of goods sold, deferred finished goods inventory	$ 901	$ 512

PROPERTY AND EQUIPMENT, NET (De

PROPERTY AND EQUIPMENT, NET (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Cost	$ 36,923	$ 34,142
Accumulated depreciation	31,921	29,755
Deprecated cost	5,002	4,387
Depreciation	2,191	2,334	$ 2,813
Lab equipment [Member]
Property, Plant and Equipment [Line Items]
Cost	14,613	13,225
Accumulated depreciation	12,066	10,788
Computers and peripheral equipment [Member]
Property, Plant and Equipment [Line Items]
Cost	19,430	18,704
Accumulated depreciation	18,430	17,750
Office furniture and equipment [Member]
Property, Plant and Equipment [Line Items]
Cost	1,071	975
Accumulated depreciation	550	521
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Cost	1,809	1,238
Accumulated depreciation	$ 875	$ 696

INTANGIBLE ASSETS, NET (Narrati

INTANGIBLE ASSETS, NET (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Amortization expense	$ 1,477	$ 1,709	$ 2,895
Technology [Member] | Ortiva [Member]
Finite-Lived Intangible Assets [Line Items]
Impairment loss	3,214
Technology [Member] | Oversi [Member]
Finite-Lived Intangible Assets [Line Items]
Impairment loss	2,432
Customer Relationships [Member] | Oversi [Member]
Finite-Lived Intangible Assets [Line Items]
Impairment loss	$ 131

INTANGIBLE ASSETS, NET (Schedul

INTANGIBLE ASSETS, NET (Schedule of Intangible Assets) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Cost	$ 14,580	$ 14,580
Accumulated amortization	11,647	10,170
Total	$ 2,933	4,410
Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Useful life (Years)	3 years 9 months 18 days
Cost	$ 9,111	9,111
Accumulated amortization	$ 7,633	6,705
Backlog [Member]
Finite-Lived Intangible Assets [Line Items]
Useful life (Years)	2 years 9 months 18 days
Cost	$ 1,877	1,877
Accumulated amortization	$ 1,877	1,867
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Useful life (Years)	4 years 4 months 24 days
Cost	$ 3,592	3,592
Accumulated amortization	$ 2,137	$ 1,598

INTANGIBLE ASSETS, NET (Sched62

INTANGIBLE ASSETS, NET (Schedule of Estimated Amortization Expense) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
2,018	$ 1,630
2,019	1,303
Total	$ 2,933	$ 4,410

OTHER PAYABLES AND ACCRUED EX63

OTHER PAYABLES AND ACCRUED EXPENSES (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
OTHER PAYABLES AND ACCRUED EXPENSES [Abstract]
Accrued expenses	$ 3,011	$ 2,255
Accrued taxes	2,311	416
Advances from customers	17	23
Others	255	270
Total other payables and accrued expenses	5,742	3,157
Foreign Exchange Contract [Member]
OTHER PAYABLES AND ACCRUED EXPENSES [Abstract]
Foreign currency derivative contracts	$ 148	$ 193

COMMITMENTS AND CONTINGENT LI64

COMMITMENTS AND CONTINGENT LIABILITIES (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Lease period	6 years
Monthly rental expenses	$ 149
Rent expense	3,126	$ 2,758	$ 2,828
Maximum possible litigation amount	$ 190

COMMITMENTS AND CONTINGENT LI65

COMMITMENTS AND CONTINGENT LIABILITIES (Schedule of Aggregate Future Minimum Lease Obligations) (Details) $ in Thousands	Dec. 31, 2017USD ($)
Commitments and Contingencies Disclosure [Abstract]
2,018	$ 2,403
2,019	1,610
2,020	844
2,021	300
2,022	75
Total	$ 5,232

SHAREHOLDERS' EQUITY (Narrative

SHAREHOLDERS' EQUITY (Narrative) (Details) ₪ / shares in Units, $ / shares in Units, ₪ in Thousands, $ in Thousands	1 Months Ended		12 Months Ended
	May 02, 2016USD ($)$ / sharesshares	Aug. 31, 2015USD ($)shares	Dec. 31, 2017USD ($)$ / sharesshares	Dec. 31, 2017USD ($)₪ / sharesshares	Dec. 31, 2016USD ($)$ / sharesshares		Dec. 31, 2016USD ($)₪ / sharesshares	Dec. 31, 2015USD ($)$ / sharesshares		Dec. 31, 2015USD ($)₪ / sharesshares	Dec. 31, 2017ILS (₪)₪ / sharesshares	Dec. 31, 2016₪ / shares	Dec. 31, 2014shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share capital, amount authorized | ₪											₪ 20,000
Ordinary shares, shares authorized			200,000,000	200,000,000	200,000,000		200,000,000				200,000,000
Ordinary shares, par value per share | ₪ / shares											₪ 0.1	₪ 0.1
Authorized amount of ordinary shares to repurchase | $		$ 15,000
Number of ordinary shares repurchased		15,000,000			791,000	[1]		25,000	[1]
Purchase of ordinary shares | $					$ 3,832			$ 166
Intrinsic value of options outstanding | $			1,063	$ 1,063	728		$ 728	1,580		$ 1,580
Intrinsic value of options exercisable | $			684	684	604		604	1,170		1,170
Intrinsic value of options vested and expected to vest | $			819	$ 819	634		$ 634	1,363		$ 1,363
Intrinsic value of options exercised | $			$ 176		$ 415			$ 469
Stock options vested during period			615,434
Weighted average remaining contractual life of options outstanding			5 years 5 months 9 days
Weighted-average remaining contractual life of exercisable options			4 years 5 months 23 days
Weighted-average grant-date fair value of the options granted | ₪ / shares				$ 2.36			$ 2.12			$ 3.45
Options outstanding			2,189,297	2,189,297	1,959,014		1,959,014	2,811,966		2,811,966	2,189,297		2,531,381
Stock options granted			676,550		643,697			704,348
Stock options granted, exercise price | $ / shares			$ 4.93		$ 4.99			$ 6.73
Repricing Program [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period for plan	2 years
Stock options granted	384,635
Stock options granted, exercise price | $ / shares	$ 7
Incremental compensation cost | $	$ 470
Share based compensation | $	$ 155
2016 option plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding			2,189,297	2,189,297							2,189,297
Stock Compensation Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost related to non-vested stock options | $			$ 1,817	$ 1,817
Unrecognized compensation cost, recognition period			2 years 9 months 7 days
Shares available for future issuance			280,532	280,532							280,532
Vesting period for plan			4 years
Options, expiration period			10 years
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost related to non-vested stock options | $			$ 2,844	$ 2,844
Unrecognized compensation cost, recognition period			2 years 9 months 7 days
Number of restricted stock units outstanding			592,126	592,126	531,570		531,570	359,404		359,404	592,126
Granted			612,173		531,570
Restricted Stock Units (RSUs) [Member] | 2016 option plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of restricted stock units outstanding			713,090	713,090							713,090
Restricted Stock Units (RSUs) [Member] | 2016 option plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted			612,173		531,570
Restricted Stock Units (RSUs) [Member] | 2006 option plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period for plan			4 years
[1]	Including acquisition expenses of $ 5 and $ 35 for the years ended December 31, 2016 and 2015, respectively.

SHAREHOLDERS' EQUITY (Schedule

SHAREHOLDERS' EQUITY (Schedule of Stock Option Activity) (Details) - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Number of shares upon exercise
Outstanding at beginning of year	1,959,014	2,811,966	2,531,381
Granted	676,550	643,697	704,348
Forfeited	(346,750)	(1,358,492)	(320,496)
Exercised	(99,517)	(138,157)	(103,267)
Outstanding at end of year	2,189,297	1,959,014	2,811,966
Exercisable at end of year	1,274,649	1,072,658	1,646,204
Vested and expected to vest	1,607,782	1,407,930	2,197,848
Weighted average exercise price
Outstanding at beginning of year	$ 8.24	$ 10.70	$ 11.99
Granted	4.93	4.99	6.73
Forfeited	7.01	12.41	15.13
Exercised	3.56	1.75	1.28
Outstanding at end of year	7.63	8.24	10.70
Exercisable at end of year	9.26	9.87	11.99
Vested and expected to vest	$ 8.44	$ 9.04	$ 11.16

SHAREHOLDERS' EQUITY (Schedul68

SHAREHOLDERS' EQUITY (Schedule of Options Outstanding) (Details) - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Shares upon exercise of options	2,189,297	1,959,014	2,811,966	2,531,381
Weighted average remaining contractual life of options outstanding	5 years 5 months 9 days
Shares upon exercise of options exercisable as of December 31, 2016	1,274,649	1,072,658	1,646,204
$23.31-27.58 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Prices, minimum	$ 23.31
Exercise Prices, maximum	$ 27.58
Shares upon exercise of options	73,000
Weighted average remaining contractual life of options outstanding	4 years 7 months 13 days
Shares upon exercise of options exercisable as of December 31, 2016	73,000
$15.20-17.07 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Prices, minimum	$ 15.20
Exercise Prices, maximum	$ 17.07
Shares upon exercise of options	112,748
Weighted average remaining contractual life of options outstanding	3 years 8 months 12 days
Shares upon exercise of options exercisable as of December 31, 2016	111,618
$10.16-14.68 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Prices, minimum	$ 10.16
Exercise Prices, maximum	$ 14.68
Shares upon exercise of options	337,750
Weighted average remaining contractual life of options outstanding	5 years 8 months 9 days
Shares upon exercise of options exercisable as of December 31, 2016	312,866
$5.01-9.13 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Prices, minimum	$ 5.01
Exercise Prices, maximum	$ 9.13
Shares upon exercise of options	654,474
Weighted average remaining contractual life of options outstanding	4 years 3 months 22 days
Shares upon exercise of options exercisable as of December 31, 2016	438,662
$0.03-4.95 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Prices, minimum	$ 0.03
Exercise Prices, maximum	$ 4.95
Shares upon exercise of options	1,011,325
Weighted average remaining contractual life of options outstanding	6 years 4 months 6 days
Shares upon exercise of options exercisable as of December 31, 2016	338,503

SHAREHOLDERS' EQUITY (Summary o

SHAREHOLDERS' EQUITY (Summary of Restricted Stock Unit Activity) (Details) - Restricted Stock Units (RSUs) [Member] - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Number of shares upon exercise
Outstanding at beginning of year	531,570	359,404
Granted	612,173	531,570
Vested	(326,026)	(152,460)
Forfeited	(165,183)	(146,388)
Outstanding at end of year	592,126	531,570
Weighted average share price
Outstanding at beginning of year	$ 6.53	$ 10.95
Granted	5	4.59
Vested	6.48	10.08
Forfeited	6.04	6.85
Outstanding at end of year	$ 6.04	$ 6.53

TAXES ON INCOME (Narrative) (De

TAXES ON INCOME (Narrative) (Details) ₪ in Thousands, $ in Thousands	1 Months Ended			12 Months Ended
	Jan. 31, 2018	Dec. 31, 2017ILS (₪)	Jan. 31, 2017	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)
Taxes On Income [Line Items]
Revenues				$ 81,992	$ 90,369	$ 99,967
Israeli Income tax rate				24.00%	25.00%	26.50%
Change in corporate tax rate			24.00%
Tax-exempt period				2 years
Dividend, withholding tax rate				15.00%
Patent use right, period				8 years
Expense deductible period				3 years
Net operating loss carry forwards				$ 52,966
Net operating loss offset limitation, percentage of accumulated losses				14.00%
Net operating loss offset limitation, percentage of taxable income				50.00%
Capital loss carry forwards				$ 27,300
Provision				245
Deferred tax assets valuation allowance				$ 23,601	$ 14,655
Scenario, Forecast [Member]
Taxes On Income [Line Items]
Change in corporate tax rate	23.00%
Commencement Of Production [Member]
Taxes On Income [Line Items]
Tax benefit period				12 years
Approval Date [Member]
Taxes On Income [Line Items]
Tax benefit period				14 years
Development Zone A [Member]
Taxes On Income [Line Items]
Israeli Income tax rate				9.00%	9.00%
Change in corporate tax rate				7.50%
Outside Development Zone [Member]
Taxes On Income [Line Items]
Israeli Income tax rate				16.00%	16.00%
Israel [Member]
Taxes On Income [Line Items]
Write-off prepaid and withholding taxes				$ 2,668
Preferred Enterprise [Member]
Taxes On Income [Line Items]
Revenues | ₪		₪ 10,000,000
Israeli Income tax rate		12.00%
Special Technological Preferred Enterprise [Member]
Taxes On Income [Line Items]
Revenues | ₪		₪ 10,000,000
Israeli Income tax rate		6.00%
Israeli resident corporation [Member]
Taxes On Income [Line Items]
Dividend, withholding tax rate				20.00%	20.00%	20.00%
Israeli resident individual [Member]
Taxes On Income [Line Items]
Dividend, withholding tax rate				20.00%	20.00%	20.00%
non-Israeli resident [Member]
Taxes On Income [Line Items]
Dividend, withholding tax rate				20.00%	20.00%	20.00%
Minimum [Member]
Taxes On Income [Line Items]
Change in corporate tax rate				25.00%
Tax-exempt period				5 years
Minimum [Member] | United States of America [Member]
Taxes On Income [Line Items]
Net operating loss carry forwards				$ 5,285
Expiration of operating loss carry forward				Dec. 31, 2026
Maximum [Member]
Taxes On Income [Line Items]
Change in corporate tax rate				26.50%
Tax-exempt period				8 years
Maximum [Member] | United States of America [Member]
Taxes On Income [Line Items]
Net operating loss carry forwards				$ 5,910
Expiration of operating loss carry forward				Dec. 31, 2032

TAXES ON INCOME (Schedule of Pr

TAXES ON INCOME (Schedule of Pre-tax Income (Loss)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Domestic	$ (17,539)	$ (7,033)	$ (16,898)
Foreign	1,031	1,243	412
Pre-tax income (loss)	$ (16,508)	$ (5,790)	$ (16,486)

TAXES ON INCOME (Schedule of th

TAXES ON INCOME (Schedule of the Reconciliation of the Theoretical Tax Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Loss before taxes on income	$ (16,508)	$ (5,790)	$ (16,486)
Theoretical tax income computed at the Israeli statutory tax rate (23%, 25% and 26.5% for the years 2017, 2016 and 2015, respectively)	(3,962)	(1,448)	(4,369)
Changes in valuation allowance	8,946	(469)	3,716
Increase (decrease) in losses and temporary differences due to change in Israeli corporate and "Approved Enterprise" tax	(5,376)	(216)	679
Write off of prepaid and withholding taxes	909	1,759	1,150
Foreign tax rates differences related to subsidiaries	(48)	576	103
Non-deductible expenses and other	684	567	181
Non-deductible share-based compensation expense	411	1,435	1,896
Income tax expense	$ 1,564	$ 2,204	$ 3,356
Israeli Income tax rate	24.00%	25.00%	26.50%

TAXES ON INCOME (Schedule of In

TAXES ON INCOME (Schedule of Income Tax Expense (Benefit)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Current taxes	$ 689	$ 211	$ 146
Deferred taxes (benefit)	(34)	234	2,060
Write off of prepaid and withholding taxes	909	1,759	1,150
Income tax expense	$ 1,564	$ 2,204	$ 3,356

TAXES ON INCOME (Schedule of De

TAXES ON INCOME (Schedule of Deferred Income Taxes) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Deferred tax assets:
Operating and capital loss carry forwards	$ 20,102	$ 12,900
Reserves and allowances	3,800	2,022
Deferred tax asset before valuation allowance	23,902	14,922
Valuation allowance	(23,601)	(14,655)
Net deferred tax asset	301	267
Deferred tax liability
Net deferred tax asset	$ 301	$ 267

GEOGRAPHIC INFORMATION (Schedul

GEOGRAPHIC INFORMATION (Schedule of Revenue by Geographic Location) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	$ 81,992	$ 90,369	$ 99,967
Europe [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	40,394	34,279	39,110
Asia And Oceania [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	13,936	27,700	28,495
Americas [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	15,532	16,025	22,553
Middle East And Africa [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	$ 12,130	$ 12,365	$ 9,809

GEOGRAPHIC INFORMATION (Sched76

GEOGRAPHIC INFORMATION (Schedule of Major Customers) (Details) - Sales [Member]	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Revenue, Major Customer [Line Items]
Concentration risk percentage	32.00%	42.00%	37.00%
Customer A [Member]
Revenue, Major Customer [Line Items]
Concentration risk percentage	32.00%	25.00%	27.00%
Customer B [Member]
Revenue, Major Customer [Line Items]
Concentration risk percentage		17.00%
Customer C [Member]
Revenue, Major Customer [Line Items]
Concentration risk percentage			10.00%

GEOGRAPHIC INFORMATION (Sched77

GEOGRAPHIC INFORMATION (Schedule of Long-Lived Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting, Asset Reconciling Item [Line Items]
Long-lived assets	$ 5,002	$ 4,387
Israel [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Long-lived assets	4,741	4,156
United States [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Long-lived assets	14	42
Other [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Long-lived assets	$ 247	$ 189

FINANCIAL INCOME (EXPENSES), 78

FINANCIAL INCOME (EXPENSES), NET (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Financial income:
Interest income	$ 2,513	$ 2,466	$ 2,174
Financial expenses:
Exchange rate differences and other	602	186	1,480
Amortization/accretion of premium/discount on marketable securities , net	1,017	1,221	1,278
Financial and other expenses, total	$ 894	$ 1,059	$ (584)

EARNINGS PER SHARE (Schedule of

EARNINGS PER SHARE (Schedule of Basic and Diluted Net Earnings (loss) Per Share) (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Numerator:
Net loss	$ (18,072)	$ (7,994)	$ (19,842)
Weighted average number of shares used in per share computations of net earnings (loss):
Weighted average number of shares outstanding used in computing basic and diluted net loss per share	33,253,158	33,202,309	33,419,917
Basic and diluted net loss per share	$ (0.54)	$ (0.24)	$ (0.59)

EARNINGS PER SHARE (Summary of

EARNINGS PER SHARE (Summary of Shares Excluded From Computation of Diluted Net Loss Per Ordinary) (Details) - shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Ordinary shares [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Number of shares excluded from computation of diluted net loss per share	2,166,782	2,000,757	3,424,891

SUBSEQUENT EVENT (Details)

SUBSEQUENT EVENT (Details) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Jan. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash consideration				$ 9,859
Subsequent Event [Member] | Netonomy Company [Member]
Cash consideration	$ 3,200
Period of performance based earn-out	2 years 6 months
Amount of performance based earn out liability	$ 4,300,000