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Common Stock, Preferred Stock and Warrants With-Down Round Protection (Tables)
12 Months Ended
Dec. 31, 2018
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, 2018 and 2017:

 

    Number     Weighted average exercise price (US$)  
Balance outstanding as of December 31,2016     562,803     $ 5.64  
Balance exercisable as of December 31,2016     334,735     $ 5.81  
Granted during 2017     4,740,318     $ 5.22  
Forfeited during 2017     (66,154 )   $ 3.93  
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     $ 4.50  
Forfeited during 2018 (*)     (2,042,413 )   $ 6.12  
Balance outstanding as of December 31,2018     3,992,610     $ 4.70  
Balance exercisable of December 31,2018     2,721,587     $ 4.63  

 

(*) during December 2018 Mr. John Graham resigned from his position as the company CEO, as a result 1,859,024 warrants were forfeited and the company revers the expenses that have been booked in 2018 and in prior periods regarding the forfeited warrants amounted approximately $1.17 million (the company recorded the reduction under general and administrative expenses)

Schedule of Stock Grants, by Exercise Price Range

The following tables summarize information about options outstanding at December 31, 2018:

 

Exercise price (US$)     Outstanding at December 31, 2018     Weighted average remaining contractual life (years)     Exercise price (US$)     Exercisable at December 31, 2018     Weighted average remaining contractual life (years)  
                                 
6.25       350,212       3.19       6.25       350,212       3.19  
7.00       2,000       5.50       7.00       2,000       5.50  
4.50       53,332       7.21       4.50       53,332       7.21  
4.50       26,666       7.88       4.50       26,666       7.88  
4.50       1,231,016       8.21       4.50       1,231,016       8.21  
4.50       661,875       8.26       4.50       382,618       8.26  
7.75       50,000       8.26       7.75       28,904       8.26  
4.50       59,576       8.41       4.50       47,171       8.41  
4.50       290,585       8.48       4.50       146,752       8.48  
4.50       585,848       8.71       4.50       250,390       8.71  
4.50       665,000       9.12       4.50       193,731       9.12  
4.50       16,500       9.24       4.50       8,795       9.24  
        3,992,610                       2,721,587          

Schedule of Assumptions Used to Value Options

      The fair value of options granted to employees during the years ended on December 31, 2018 and 2017 was estimated at the dates of grant using the Black-Scholes option model. The following are the data and assumptionsused:

 

    2018     2017  
Dividend yield (%)     0       0  
Expected volatility (%) (*)     56.59       56.59  
Risk free interest rate (%)     1.31       0.92  
Expected term of options (years)     5.5 - 6.5       5-10.5  
Exercise price (US dollars)     4.5       4.50 - 7.75  
Stock price (US dollars) (**)     2.45       2.38  
Fair value (US dollars)     0.88-0.99       0.58-1.28  

 

  (*) Due to the low trading volume of the Company’s Common Stock, the expected volatility for 2018 and 2017 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, 2018 and 2017 reflects the Companymanagement’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. In reaching its estimation for December 31, 2017, management considered, among other things, a valuation prepared by a third-party valuation firm following the issuance of the Series C Units.

Warrant [Member]  
Schedule of Changes in Fair Value of Level 3 Liability

      The changes in the fair value of the Level 3 liability are as follows (in US dollars):
       

 

    Warrants with Down-Round Protection  
    December 31,  
    2018     2017  
             
Balance, Beginning of the year     768,249       681,970  
Warrants issued as consideration for placement services     -       353,721  
Stock based compensation to financial advisor     -       32,880  
Change in fair value of Warrants with Down-Round Protection     -       (300,322 )
Reclassification to stockholder’s deficit (*)     (768,249 )      
Balance, End of year     -       768,249  

 

  (*) As a result of the early adoption of ASU 2017-11 the company reclassified all the warrants with down round protection to stockholder’s deficit (see Note 2U and 2W)

Schedule of Fair Value Assumptions

The key inputs used in the fair value calculations were as follows:

 

    December 31, 2017  
       
Dividend yield (%)     -  
Expected volatility (%) (*)     56.59  
Risk free interest rate (%)     1.31  
Expected term of options (years)     0.2 - 4.92  
Exercise price (US dollars)     4.50 - 7.75  
Share price (US dollars) (**)     2.45  
Fair value (US dollars)     0.002 – 0.81  

 

  (*) Due to the low trading volume of the Company’s Common Stock, the expected volatility was based on a sample of 254 companies operating in the Healthcare Products industry.
  (**) The Common Stock price, per share reflects the Company’s management’s estimation of the fair value per share of Common Stock as of December 31, 2017. In reaching its estimation for such periods, management considered, among other things, a valuation prepared by a third-party valuation firm following the issuance of the Series D Units at December 31, 2017.

Series D Warrant [Member]  
Schedule of Fair Value Assumptions

    December 31, 2018   December 31, 2017
Dividend yield (%)    -     -
Expected volatility (%)   56.32     56.59
Risk free interest rate (%)   2.50     1.31
Expected term of options (years)   5     0.2 - 4.92
Exercise price (US dollars)   0.258     4.50, 5.75, 7.75
Share price (US dollars)   0.258     2.45
Fair value (US dollars)   0.13     0.12 – 0.81