Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Narrative) (Details)

v3.19.3
Stockholders' Equity (Narrative) (Details) - $ / shares
9 Months Ended
Jul. 23, 2019
Sep. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Weighted average grant-date fair value of stock options granted   $ 0.91
Expected dividend yield   0.00%
Common stock warrants [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Outstanding warrants to purchase   9,030,730
Weighted-average exercise price   $ 1.89
Equity Plan [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Shares remaining available for grant under plans   4,021,160
Increase in the additional number of shares available for grant 4,000,000