CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands |
Dec. 31, 2018 |
Dec. 31, 2017 |
| Current assets: |
|
|
| Cash and cash equivalents |
$ 307,064
|
$ 104,288
|
| Investments |
96,987
|
|
| Prepaid expenses and other current assets |
9,737
|
700
|
| Restricted cash |
622
|
|
| Total current assets |
414,410
|
104,988
|
| Property, plant and equipment, net |
62,796
|
2,415
|
| Restricted cash |
1,735
|
284
|
| Other assets |
168
|
|
| Total assets |
479,109
|
107,687
|
| Current liabilities: |
|
|
| Accounts payable |
7,886
|
2,033
|
| Accrued expenses and other current liabilities |
12,118
|
2,986
|
| Current portion of long-term debt |
|
2,139
|
| Total current liabilities |
20,004
|
7,158
|
| Long-term debt, net of discount and current portion |
24,347
|
3,302
|
| Deferred rent |
143
|
158
|
| Preferred stock warrant liability |
|
866
|
| Liability for early exercise of stock options and restricted stock |
166
|
100
|
| Lease liability, net of current portion |
41,441
|
|
| Total liabilities |
86,101
|
11,584
|
| Commitments and contingencies (Note 12) |
|
|
| Convertible preferred stock (Series A, B and C), $0.001 par value; no shares and 44,070,808 shares authorized at December 31, 2018 and 2017, respectively; no shares and 43,933,006 shares issued and outstanding at December 31, 2018 and 2017, respectively |
|
139,790
|
| Stockholders' equity (deficit): |
|
|
| Preferred stock, $0.001 par value; 10,000,000 shares and no shares authorized at December 31, 2018 and 2017, respectively; no shares issued or outstanding at December 31, 2018 and 2017 |
|
|
| Common stock, $0.001 par value; 150,000,000 and 65,000,000 shares authorized at December 31, 2018 and 2017, respectively; 79,234,853 and 14,977,317 shares issued and outstanding at December 31, 2018 and 2017, respectively |
79
|
15
|
| Additional paid-in capital |
543,040
|
17,277
|
| Accumulated other comprehensive loss |
(29)
|
|
| Accumulated deficit |
(150,082)
|
(60,979)
|
| Total stockholders' equity (deficit) |
393,008
|
(43,687)
|
| Total liabilities, convertible preferred stock and stockholders' equity (deficit) |
$ 479,109
|
$ 107,687
|