8. Stockholders' Equity (Details Narrative) - $ / shares |
3 Months Ended | 9 Months Ended | |||
|---|---|---|---|---|---|
Sep. 30, 2020 |
Dec. 31, 2019 |
Sep. 30, 2019 |
Sep. 30, 2020 |
Sep. 30, 2019 |
|
| Colllaboration Warrants [Member] | |||||
| Warrants outstanding | 30,307 | 32,412 | 30,307 | ||
| Warrants expired | 0 | 2,105 | |||
| Warrants weighted average exercise price | $ 124.74 | $ 124.74 | $ 124.74 | ||
| Warrant expiration dates | April 2021 through May 2021 | ||||
| Warrants granted | 0 | 0 | 0 | 0 | |
| Warrants exercised | 0 | 0 | 0 | 0 | |
| Warrants [Member] | Debt and Equity Financing Arrangements [Member] | |||||
| Warrants outstanding | 378,453 | 658,557 | 378,453 | ||
| Warrants weighted average exercise price | $ 38.41 | $ 38.41 | |||
| Warrant expiration dates | March 2021 through September 2026 | ||||
| Prefunded Warrants [Member] | |||||
| Warrants outstanding | 0 | ||||
| Warrants granted | 500,000 | 600,000 | |||
| Warrants exercised | 100,000 | 500,000 | 500,000 | ||
| Debt and equity warrants [Member] | |||||
| Warrants granted | 2,500,000 | 2,600,000 | |||
| Warrants exercised | 1,900,000 | 200,000 | 1,900,000 | ||
| Warrants expired | 100,000 | 0 | |||