CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($)
$ in Thousands |
Common stock |
Additional paid-in capital |
Accumulated other comprehensive income |
Accumulated deficit |
Total |
| Balances at Beginning of period (in shares) at Dec. 31, 2019 |
80,016,245
|
|
|
|
|
| Balances at Beginning of period at Dec. 31, 2019 |
$ 80
|
$ 586,798
|
$ 75
|
$ (312,740)
|
$ 274,213
|
| Issuance of common stock upon exercise of stock options |
|
486
|
|
|
486
|
| Issuance of common stock upon exercise of stock options (in shares) |
413,721
|
|
|
|
|
| Stock-based compensation expense |
|
8,488
|
|
|
8,488
|
| Unrealized gains (losses) on investments |
|
|
456
|
|
456
|
| Net loss |
|
|
|
(48,486)
|
(48,486)
|
| Balances at End of period (in shares) at Mar. 31, 2020 |
80,429,966
|
|
|
|
|
| Balances at End of period at Mar. 31, 2020 |
$ 80
|
595,772
|
531
|
(361,226)
|
235,157
|
| Balances at Beginning of period (in shares) at Dec. 31, 2019 |
80,016,245
|
|
|
|
|
| Balances at Beginning of period at Dec. 31, 2019 |
$ 80
|
586,798
|
75
|
(312,740)
|
274,213
|
| Net loss |
|
|
|
|
(127,192)
|
| Balances at End of period (in shares) at Sep. 30, 2020 |
80,923,820
|
|
|
|
|
| Balances at End of period at Sep. 30, 2020 |
$ 81
|
612,934
|
32
|
(439,932)
|
173,115
|
| Balances at Beginning of period (in shares) at Dec. 31, 2019 |
80,016,245
|
|
|
|
|
| Balances at Beginning of period at Dec. 31, 2019 |
$ 80
|
586,798
|
75
|
(312,740)
|
274,213
|
| Net loss |
|
|
|
|
(167,700)
|
| Balances at End of period (in shares) at Dec. 31, 2020 |
81,053,651
|
|
|
|
|
| Balances at End of period at Dec. 31, 2020 |
$ 81
|
621,946
|
4
|
(480,471)
|
141,560
|
| Balances at Beginning of period (in shares) at Mar. 31, 2020 |
80,429,966
|
|
|
|
|
| Balances at Beginning of period at Mar. 31, 2020 |
$ 80
|
595,772
|
531
|
(361,226)
|
235,157
|
| Issuance of common stock upon exercise of stock options |
|
256
|
|
|
256
|
| Issuance of common stock upon exercise of stock options (in shares) |
115,553
|
|
|
|
|
| Stock-based compensation expense |
|
8,252
|
|
|
8,252
|
| Unrealized gains (losses) on investments |
|
|
(337)
|
|
(337)
|
| Net loss |
|
|
|
(37,854)
|
(37,854)
|
| Balances at End of period (in shares) at Jun. 30, 2020 |
80,545,519
|
|
|
|
|
| Balances at End of period at Jun. 30, 2020 |
$ 80
|
604,280
|
194
|
(399,080)
|
205,474
|
| Issuance of common stock upon exercise of stock options |
$ 1
|
669
|
|
|
670
|
| Issuance of common stock upon exercise of stock options (in shares) |
378,301
|
|
|
|
|
| Stock-based compensation expense |
|
7,985
|
|
|
7,985
|
| Unrealized gains (losses) on investments |
|
|
(162)
|
|
(162)
|
| Net loss |
|
|
|
(40,852)
|
(40,852)
|
| Balances at End of period (in shares) at Sep. 30, 2020 |
80,923,820
|
|
|
|
|
| Balances at End of period at Sep. 30, 2020 |
$ 81
|
612,934
|
32
|
(439,932)
|
173,115
|
| Balances at Beginning of period (in shares) at Dec. 31, 2020 |
81,053,651
|
|
|
|
|
| Balances at Beginning of period at Dec. 31, 2020 |
$ 81
|
621,946
|
4
|
(480,471)
|
141,560
|
| Issuance of common stock from public offering, net of commissions, underwriting discounts and offering costs of $800 |
$ 7
|
187,193
|
|
|
187,200
|
| Issuance of common stock from public offering, net of commissions, underwriting discounts and offering costs (in shares) |
6,896,552
|
|
|
|
|
| Issuance of common stock upon exercise of stock options |
$ 1
|
5,907
|
|
|
5,908
|
| Issuance of common stock upon exercise of stock options (in shares) |
1,237,324
|
|
|
|
|
| Stock-based compensation expense |
|
8,642
|
|
|
8,642
|
| Unrealized gains (losses) on investments |
|
|
3
|
|
3
|
| Net loss |
|
|
|
(42,330)
|
(42,330)
|
| Balances at End of period (in shares) at Mar. 31, 2021 |
89,187,527
|
|
|
|
|
| Balances at End of period at Mar. 31, 2021 |
$ 89
|
823,688
|
7
|
(522,801)
|
300,983
|
| Balances at Beginning of period (in shares) at Dec. 31, 2020 |
81,053,651
|
|
|
|
|
| Balances at Beginning of period at Dec. 31, 2020 |
$ 81
|
621,946
|
4
|
(480,471)
|
141,560
|
| Net loss |
|
|
|
|
(141,526)
|
| Balances at End of period (in shares) at Sep. 30, 2021 |
89,862,482
|
|
|
|
|
| Balances at End of period at Sep. 30, 2021 |
$ 90
|
846,112
|
|
(621,997)
|
224,205
|
| Balances at Beginning of period (in shares) at Mar. 31, 2021 |
89,187,527
|
|
|
|
|
| Balances at Beginning of period at Mar. 31, 2021 |
$ 89
|
823,688
|
7
|
(522,801)
|
300,983
|
| Issuance of common stock upon exercise of stock options |
$ 1
|
3,719
|
|
|
3,720
|
| Issuance of common stock upon exercise of stock options (in shares) |
532,400
|
|
|
|
|
| Stock-based compensation expense |
|
9,597
|
|
|
9,597
|
| Unrealized gains (losses) on investments |
|
|
(6)
|
|
(6)
|
| Net loss |
|
|
|
(50,180)
|
(50,180)
|
| Balances at End of period (in shares) at Jun. 30, 2021 |
89,719,927
|
|
|
|
|
| Balances at End of period at Jun. 30, 2021 |
$ 90
|
837,004
|
1
|
(572,981)
|
264,114
|
| Issuance of common stock upon exercise of stock options |
|
919
|
|
|
919
|
| Issuance of common stock upon exercise of stock options (in shares) |
142,555
|
|
|
|
|
| Stock-based compensation expense |
|
8,189
|
|
|
8,189
|
| Unrealized gains (losses) on investments |
|
|
$ (1)
|
|
(1)
|
| Net loss |
|
|
|
(49,016)
|
(49,016)
|
| Balances at End of period (in shares) at Sep. 30, 2021 |
89,862,482
|
|
|
|
|
| Balances at End of period at Sep. 30, 2021 |
$ 90
|
$ 846,112
|
|
$ (621,997)
|
$ 224,205
|