XML 58 R44.htm IDEA: XBRL DOCUMENT v3.19.1
Stockholders' Equity - Schedule of Options and Equity Estimated Based on Weighted Average Assumptions (Details)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Expected dividend yield 0.00% 0.00%
Expected life 5 years  
Weighted average grant date fair value for options and equity warrants issued $0.23 per option for 5,864,505 options $0.35per option/warrant for 1,340,517 options/equity warrants
Minimum [Member]    
Risk-free interest rate 2.60% 1.72%
Expected life   1 year 2 months 30 days
Expected volatility 85.68% 91.60%
Maximum [Member]    
Risk-free interest rate 3.00% 1.89%
Expected life   5 years
Expected volatility 86.89% 144.15%