Annual report pursuant to Section 13 and 15(d)

Stock-based Compensation - Schedule of Stock Option Activity (Details)

v3.19.1
Stock-based Compensation - Schedule of Stock Option Activity (Details) - Stock Options [Member] - $ / shares
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of Options, Outstanding at Beginning 11,396,000 8,290,000
Number of Options, Granted 4,300,000 3,568,000
Number of Options, Exercised
Number of Options, Forfeited (1,262,000) (436,000)
Number of Options, Cancelled (26,000)
Number of Options, Expired (977,000)
Number of Options, Outstanding at Ending 13,457,000 11,396,000
Weighted average Exercise Price, Outstanding at Beginning $ 1.40 $ 0.85
Weighted average Exercise Price, Granted 0.76 2.77
Weighted average Exercise Price, Exercised
Weighted average Exercise Price, Forfeited 2.08 2.37
Weighted average Exercise Price, Cancelled 0.63
Weighted average Exercise Price, Expired 1.32
Weighted average Exercise Price, Outstanding at Ending $ 1.13 $ 1.40
Weighted Average Contractual Term in Years, Beginning 7 years 9 months 18 days 7 years 3 months 19 days
Weighted Average Contractual Term in Years, Ending 6 years 2 months 12 days 7 years 9 months 18 days