Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands |
Dec. 31, 2021 |
Dec. 31, 2020 |
|---|---|---|
| Preferred stock, par value | $ 0.001 | $ 0.001 |
| Preferred stock, shares authorized | 10,000,000 | 10,000,000 |
| Common stock, par value | $ 0.001 | $ 0.001 |
| Common stock, shares authorized | 200,000,000 | 200,000,000 |
| Common stock, shares issued | 72,931,490 | 68,890,819 |
| Common stock, shares outstanding | 72,769,424 | 68,728,753 |
| Treasury stock, shares | 162,066 | 162,066 |
| Preferred Stock- Series B [Member] | ||
| Preferred stock, par value | $ 0.001 | $ 0.001 |
| Preferred stock, liquidation preference | $ 5,659 | $ 5,659 |
| Preferred stock, stated value | $ 1,000 | $ 1,000 |
| Preferred stock, shares designated | 10,000 | 10,000 |
| Preferred stock, shares issued | 5,659 | 5,659 |
| Preferred stock, shares outstanding | 5,659 | 5,659 |