Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Tables)

v3.10.0.1
Stockholders' Equity (Tables)
9 Months Ended
Sep. 30, 2018
Equity [Abstract]  
Schedule of Allocation of Stock-based Compensation

The stock-based compensation expense attributable to option grants was allocated as follows:

 

    Three months ended September 30,     Nine months ended September 30,  
    2018     2017     2018     2017  
Cost of product sales   $ 35     $ 17     $ 132     $ 41  
Research and development cost     26       62       215       222  
General and administrative expense     300       46       506       329  
Total   $ 361     $ 125     $ 853     $ 592  

Schedule of Assumptions Used in Black-Scholes-Merton Option-Pricing Model

The following assumptions were used in the Black-Scholes-Merton pricing model to estimate the fair value of options granted during the periods presented.

 

    Three months ended September 30,     Nine months ended September 30,  
    2018     2017     2018     2017  
                         
Expected stock volatility     78.0%-79.3 %     70.7%-71.4 %     78.0%-86.3 %     70.7%-72.7 %
Risk free interest rate     2.6%-2.9 %     1.5%-1.7 %     2.1%-2.9 %     1.4%-1.8 %
Expected years until exercise     3.5 %     3.5 %     2.5 - 3.5 %     2.5 - 3.5 %
Dividend yield     0 %     0 %     0 %     0 %