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Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2016
Significant Accounting Policies [Abstract] |
Schedule of property, plant and equipment depreciation rates |
|  |  | % |  |
| Computers and software |  | 20 - 33 |  | (Mainly 33)
| Office furniture and equipment |  | 6 - 15 |  | (Mainly 6)
| Leasehold improvements |  | Over the shorter of the period of the lease or the life of the assets |  |
| Motor vehicles |  | 15
Schedule of weighted-average assumptions used in valuation of stock option |
|  |  | Year ended December 31, |
|  |  | 2016 |  |  | 2015 |  |  | 2014 |
| Risk-free interest |  |  | 1.09 | % |  |  | 1.13 | % |  |  | 1.26 |
| Dividend yields |  |  | 0 |  |  |  | 0 |  |  |  | 0 |
| Volatility |  |  | 85 | % |  |  | 76 | % |  |  | 84 | %
| Expected option term |  |  | 3.5 years |  |  |  | 3.8 years |  |  |  | 4 years |
| Forfeiture rate |  |  | 0 | % |  |  | 0 | % |  |  | 0 | %

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- Definition Schedule Of Property Plan And Equipment Depreciation Rates [Table Text Block] + References No definition available. + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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