Catch up contribution amount towards 401(k) defined contribution plans eligible for participants with age 50 or more.

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Reflects the calculation as of the balance sheet date of the average interest rate weighted by the amount of long-term deposit outstanding by type or by instrument at that time.

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No definition available.

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Restricted long term deposits.

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No definition available.

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- Definition

Restricted short term deposits.

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No definition available.

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- Definition

The charge against earnings in the period for known and estimated costs of termination benefits provided to current employees that are involuntarily terminated under a benefit arrangement associated with exit from or disposal of business activities or restructurings.

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No definition available.

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Reflects the calculation as of the balance sheet date of the average interest rate weighted by the amount of short-term deposit outstanding by type or by instrument at that time.

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No definition available.

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- Definition

Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 720
-SubTopic 35
-Section 50
-Paragraph 1
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- Definition

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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-Name Accounting Standards Codification
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- Definition

Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.

+ References

No definition available.

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Maximum amount the employee may contribute to a defined contribution plan.

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No definition available.

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- Definition

Description of defined contribution pension and other postretirement plans. Includes, but is not limited to, plan utilized, employee group covered, and employer matching contributions.

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No definition available.

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- Definition

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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No definition available.

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Amount of cumulative effect of the change in accounting principle or new accounting pronouncement on retained earnings or other components of equity or net assets in the statement of financial position as of the beginning of the earliest period presented.

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- Definition

Represents the quantification of the effect of adopting the new accounting standard or change in accounting principle expected by the entity to have a significant effect on the entity's financial statements.

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No definition available.

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- Definition

Revenue earned during the period from non-repayable sum of money awarded to an entity to carry out a specific purpose as provided in grant agreements.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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- Definition

Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs.

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SIGNIFICANT ACCOUNTING POLICIES (Details Textual) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	12 Months Ended
	Jan. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Jan. 02, 2018
Short Term Bank Deposits Bear Interest Average Rate		0.95%	0.72%
Restricted Short Term Deposits		$ 2,739	$ 3,401
Long Term Bank Deposits Bear Interest Average Rate		2.05%	1.50%
Restricted Long Term Deposits		$ 4,207	$ 5,407
Revenue from Grants		$ 8,290	$ 7,335	$ 5,448
Antidilutive Securities and Outstanding Options, RSUs and Warrants Excluded from Computation of Earings Per Share, Amount		317,186	1,927,281	2,250,433
Severance Cost		$ 2,631	$ 3,217	$ 2,153
Catch Up Contribution Amount Eligible For Participants With Age 50 Or More		$ 6
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value		$ 3.05	$ 2.01	$ 2.04
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Amount		$ 287	$ 286	$ 287
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay		6.00%
Advertising Expense		$ 442	687	$ 604
Defined Contribution Plan, Description		All eligible employees may elect to contribute a portion of their annual compensation to the plan through salary deferrals, subject to the IRS limit of $18 during the years ended December 31, 2016 and 2017, plus a catch-up contribution of $6 for participants age 50 or over. The Group matches 50% of employees’ contributions, up to a maximum of 6% of the employees' annual pay.
Minimum [Member]
Finite-Lived Intangible Asset, Useful Life		4 years 6 months
Maximum [Member]
Finite-Lived Intangible Asset, Useful Life		10 years
Internal Revenue Service (IRS) [Member]
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Amount		$ 18	18
Warranty Reserves [Member]
Valuation Allowances and Reserves, Balance		339	349
Allowance for Sales Returns [Member]
Valuation Allowances and Reserves, Balance		$ 2,174	$ 1,948
Accounting Standards Update 2016-09 [Member]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	$ 131
Accounting Standards Update 2014-09 [Member] \| Subsequent Event [Member]
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets					$ 180