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Selected Statements of Operations Data (Details 3) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Numerator: |  |  |
Numerator for basic net income (loss) per Ordinary Share | $ 2,901 | $ 1,915 | $ (923)
Effect of dilutive securities: |  |  |
Options and warrants issued to grantees and investors, respectively |  |  |
Numerator for dilutive net income (loss) per Ordinary Share | $ 2,901 | $ 1,915 | $ (923)
Denominator: |  |  |
Denominator for dilutive net income (loss) per Ordinary Share - weighted average number of Ordinary Shares | 12,039,176 | 10,406,897 | 8,572,681
Effect of dilutive securities: |  |  |
Options and warrants issued to grantees and investors, respectively | 312,390 | 372,650 |
Denominator for diluted net income (loss) per Ordinary Share - adjusted weighted average number of Ordinary Shares | 12,351,566 | 10,779,547 | 8,572,681

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- Definition Amount of increase (decrease) to net income used for calculating diluted earnings per share (EPS), resulting from the assumed exercise of stock options or restrictive stock units (RSUs). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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- Definition Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of call options and warrants using the treasury stock method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 23 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=96947427&loc=d3e1757-109256 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent, and includes adjustments resulting from the assumption that dilutive convertible securities were converted, options or warrants were exercised, or that other shares were issued upon the satisfaction of certain conditions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=96947427&loc=d3e1505-109256 + Details
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