Consolidated Balance Sheets - USD ($) $ in Thousands |
Dec. 31, 2021 |
Dec. 31, 2020 |
| Current assets: |
|
|
| Cash and cash equivalents |
$ 93,287
|
$ 170,056
|
| Marketable securities |
108,346
|
1,002
|
| Restricted cash |
11,285
|
0
|
| Prepaid expenses and other current assets |
7,672
|
4,332
|
| Total current assets |
220,590
|
175,390
|
| Long-term restricted cash |
6,005
|
992
|
| Property and equipment, net |
21,622
|
22,105
|
| Operating lease right-of-use assets |
22,920
|
21,344
|
| Deposits and other long-term assets |
2,352
|
1,736
|
| Long-term marketable securities |
4,617
|
0
|
| Total assets |
278,106
|
221,567
|
| Current liabilities: |
|
|
| Accounts payable |
4,230
|
9,578
|
| Accrued compensation |
6,925
|
6,331
|
| Accrued liabilities |
411
|
677
|
| Accrued research and development expenses |
3,706
|
1,053
|
| Lease liabilities, current portion |
7,483
|
5,874
|
| Deferred revenue, current portion |
17,201
|
3,475
|
| Total current liabilities |
39,956
|
26,988
|
| Other non-current liabilities |
0
|
395
|
| Lease liabilities, net of current portion |
18,936
|
19,225
|
| Deferred revenue, net of current portion |
3,128
|
8,220
|
| Total liabilities |
62,020
|
54,828
|
| Commitments and contingencies (Notes 6 and 7) |
|
|
| Stockholders’ equity: |
|
|
| Preferred stock, $0.0001 par value; 10,000,000 shares authorized; no shares issued and outstanding at December 31, 2021 and 2020 |
0
|
0
|
| Common stock, $0.0001 par value; 300,000,000 shares authorized at December 31, 2021 and 2020; 69,047,878 and 47,552,693 shares issued and outstanding at December 31, 2021 and 2020, respectively |
20
|
18
|
| Additional paid-in capital |
617,523
|
493,023
|
| Accumulated other comprehensive gain |
(73)
|
0
|
| Accumulated deficit |
(401,384)
|
(326,302)
|
| Total stockholders’ equity |
216,086
|
166,739
|
| Total liabilities and stockholders’ equity |
$ 278,106
|
$ 221,567
|