Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Deficit, Significant Terms of Options Outstanding (Details)

v3.19.3
Stockholders' Deficit, Significant Terms of Options Outstanding (Details) - $5.00 - 7.50 [Member]
6 Months Ended
Jun. 30, 2019
$ / shares
shares
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]  
Range of exercise prices, lower range limit (in dollars per share) $ 5.00
Range of exercise prices, upper range limit (in dollars per share) $ 7.50
Number of options outstanding (in shares) | shares 5,381,462
Weighted average remaining contractual life 9 years 9 months 18 days
Weighted average exercise price of outstanding options (in dollars per share) $ 5.06
Number of options, exercisable (in shares) | shares 260,545
Weighted average exercise price of exercisable options (in dollars per share) $ 5.04