Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Tables)

v3.19.1
Stockholders' Equity (Tables)
3 Months Ended
Mar. 31, 2019
Equity [Abstract]  
Schedule of the allocation of stock-based compensation
The stock-based compensation expense was allocated as follows:
 
Three months ended March 31,
 
2019
 
2018
Cost of product sales
$
75

 
$
50

Research and development cost
115

 
112

General and administrative expense
877

 
(18
)
Total
$
1,067

 
$
144

Schedule of assumptions used in the 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 March 31,
 
2019
 
2018
 
 
 
 
Expected stock volatility
70.5%-86.3%

 
78.4%-79.9%

Risk free interest rate
0.92%-3.04%

 
2.06%-2.45%

Expected years until exercise
3.4

 
3.5

Dividend yield
0
%
 
0
%