Annual report pursuant to Section 13 and 15(d)

STOCK OPTION PLANS (Details)

v3.19.1
STOCK OPTION PLANS (Details)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Expected volatility 109.00% 111.00% 109.00%
Expected term 5 years 5 years 5 years
Risk-free interest rate 2.62% 1.81% 1.10%
Expected dividend yield 0.00% 0.00% 0.00%