Consolidated Balance Sheets (Parenthetical) - $ / shares |
Dec. 31, 2021 |
Dec. 31, 2020 |
|---|---|---|
| Statement Of Financial Position [Abstract] | ||
| Preferred stock, par value | $ 0.001 | $ 0.001 |
| Preferred stock, shares authorized | 5,000,000 | 5,000,000 |
| Preferred stock, shares issued | 0 | 0 |
| Preferred stock, shares outstanding | 0 | 0 |
| Common stock, par value | $ 0.001 | $ 0.001 |
| Common stock, shares authorized | 120,000,000 | 60,000,000 |
| Common stock, shares issued | 49,429,000 | 48,802,000 |
| Common stock, shares outstanding | 49,429,000 | 48,802,000 |