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Common Stock, and Warrants With-Down Round Protection (Tables) | 12 Months Ended
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Dec. 31, 2019
Schedule of Stock Grants Activity |
|  |  | The following tables present a summary of the status of the grants to employees, officers and directors as of December 31, 2019 and 2018:
Grants to Employees |  | Number |  |  | Weighted average exercise price (US$) |
Balance outstanding as of December 31,2017 |  |  | 5,236,967 |  |  | $ | 5.28 |
Balance exercisable of December 31,2017 |  |  | 2,428,716 |  |  | $ | 5.28 |
Granted during 2018 |  |  | 798,056 |  |  | $ | 4.5 |
Forfeited during 2018 |  |  | (2,042,413 | ) |  | $ | 6.12 |
Balance outstanding as of December 31,2018 |  |  | 3,992,610 |  |  | $ | 4.7 |
Balance exercisable of December 31,2018 |  |  | 2,721,587 |  |  | $ | 4.63 |
Granted during 2019 (1) |  |  | 75,000 |  |  | $ | 4.5 |
Forfeited during 2019 |  |  | (2,039,525 | ) |  | $ | 4.51 |
Balance outstanding as of December 31,2019 |  |  | 2,028,085 |  |  | $ | 4.88 |
Balance exercisable of December 31,2019 |  |  | 1,724,194 |  |  | $ | 4.63 |
| (1) | On January 1, 2019, we issued a ten-year non-qualified stock option to our former President, for the purchase of 75,000 shares of Common Stock at an exercise price of $4.50 per share, with three-year quarterly vesting commencing on the first quarter after the effective date.
Schedule of Stock Grants, by Exercise Price Range | The following tables summarize information about options outstanding at December 31, 2019:
Exercise price (US$) |  |  | Outstanding at December 31, 2019 |  |  | Exercisable at December 31, 2019 |  |  | Weighted average remaining contractual life (years) |
| 4.50 |  |  |  | 1,631,873 |  |  |  | 1,327,982 |  |  |  | 7.51 |
| 6.25 |  |  |  | 344,212 |  |  |  | 344,212 |  |  |  | 2.19 |
| 7.00 |  |  |  | 2,000 |  |  |  | 2,000 |  |  |  | 4.50 |
| 7.75 |  |  |  | 50,000 |  |  |  | 50,000 |  |  |  | 7.26 |
|  |  |  |  | 2,028,085 |  |  |  | 1,724,194 |  |  |  |  |
Schedule of Assumptions Used to Value Options |
|  |  | The fair value of options granted to employees during the years ended on December 31, 2019 and 2018 was estimated at the dates of grant using the Black-Scholes option model. The following are the data and assumptions used:
|  | 2019 |  |  | 2018 |
Dividend yield (%) |  |  | - |  |  |  | - |
Expected volatility (%) (*) |  |  | 56.32 |  |  |  | 56.59 |
Risk free interest rate (%) |  |  | 2.5 |  |  |  | 1.31 |
Expected term of options (years) |  |  | 5 |  |  |  | 5.5 - 6.5 |
Exercise price (US dollars) |  |  | 0.258 |  |  |  | 4.5 |
Stock price (US dollars) (**) |  |  | 0.258 |  |  |  | 2.45 |
Fair value (US dollars) |  |  | 0.0137 |  |  |  | 0.88-0.99 |
| (*) | Due to the low trading volume of the Company’s Common Stock, the expected volatility for 2019 and 2018 grant was based on a sample of 248 and 254 companies operating in the Healthcare Products industry, respectively.
| (**) | The Common Stock price, per share for the year ended December 31, 2019 and 2018 reflects the Company’s management’s estimation of the fair value per share of Common Stock. In reaching its estimation for December 31, 2018, management considered, among other things, a valuation prepared by a third-party valuation firm following the issuance of the Series D Units.
Warrant [Member] |
Schedule of Changes in Fair Value of Level 3 Liability |
|  | The changes in the fair value of the Level 3 liability were as follows (in US dollars):
|  | Warrants with Down- Round Protection |
|  | December 31, |
|  | 2019 |  |  | 2018 |
Balance, Beginning of the year |  |  | - |  |  |  | 768,249 |
Warrants issued as consideration for placement services |  |  | - |  |  |  | - |
Stock based compensation to financial advisor |  |  | - |  |  |  | - |
Change in fair value of Warrants with Down-Round Protection |  |  | - |  |  |  | - |
Reclassification to stockholder’s deficit (*) |  |  | - |  |  |  | (768,249 | )
Balance, End of year |  |  | - |  |  |  | - |
| (*) | As a result of the early adoption of ASU 2017-11, during the year ended December 31, 2018, the Company reclassified all the warrants with down round protection to stockholder’s deficit.
Schedule of Fair Value Assumptions |
|  | As of December 31, 2019, and 2018, the key inputs used in the fair value calculations of the warrant that were affected by the down-round protection were as follows:
Fair value calculations - Warrant |  | 31-Dec-19 |  |  | 31-Dec-18 |
Dividend yield (%) |  |  | - |  |  |  | - |
Expected volatility (%) |  |  | 56.32 |  |  |  | 56.32 |
Risk free interest rate (%) |  |  | 2.5 |  |  |  | 2.5 |
Expected term of options (years) |  |  | 5 |  |  |  | 5 |
Exercise price (US dollars) |  |  | 0.258-5.400 |  |  |  | 0.258 |
Share price (US dollars) |  |  | 0.258 |  |  |  | 0.258 |
Fair value (US dollars) |  |  | 0.003-0.134 |  |  |  | 0.13 |

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- Definition Tabular disclosure of input and valuation technique used to measure fair value and change in valuation approach and technique for each separate class of asset and liability measured on recurring and nonrecurring basis. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of the fair value measurement of liabilities using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and gains or losses recognized in other comprehensive income (loss) and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs) by class of liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19279-110258 + Details
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- Definition Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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