Stockholders' Equity (Details 3) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2018 |
Dec. 31, 2017 |
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
| Employee Benefits and Share-based Compensation | $ 1,994 | $ 3,117 |
| Research and development | ||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
| Employee Benefits and Share-based Compensation | 95 | 1,180 |
| General and administrative | ||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
| Employee Benefits and Share-based Compensation | $ 1,899 | $ 1,937 |
| X | ||||||||||
- Definition Amount of expense for employee benefit and equity-based compensation. No definition available.
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|