CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2018 |
Jun. 30, 2017 |
Jun. 30, 2018 |
Jun. 30, 2017 |
|
| Statement Of Income And Comprehensive Income [Abstract] | ||||
| Collaboration revenue | $ 926,477 | $ 1,749,849 | ||
| Operating expenses: | ||||
| Research and development | 10,289,871 | $ 4,056,289 | 18,288,266 | $ 6,855,261 |
| General and administrative | 4,527,335 | 1,982,231 | 8,355,357 | 3,874,778 |
| Total operating expenses | 14,817,206 | 6,038,520 | 26,643,623 | 10,730,039 |
| Loss from operations | (13,890,729) | (6,038,520) | (24,893,774) | (10,730,039) |
| Other income (expense): | ||||
| Change in fair value of convertible preferred stock tranche liability | (876,000) | |||
| Interest income | 996,493 | 35,766 | 1,475,976 | 48,492 |
| Total other income (expense) | 996,493 | 35,766 | 1,475,976 | (827,508) |
| Net loss and net loss attributable to common stockholders-basic and diluted | $ (12,894,236) | $ (6,002,754) | $ (23,417,798) | $ (11,557,547) |
| Net loss per share attributable to common stockholders-basic and diluted | $ (0.35) | $ (2.61) | $ (1.19) | $ (4.89) |
| Weighted-average common shares outstanding-basic and diluted | 36,860,619 | 2,296,118 | 19,606,543 | 2,365,021 |