| Mar'20 | Dec'19 | Sep'19 | Jun'19 | Mar'19 | Dec'18 | Sep'18 |
|---|---|---|---|---|---|---|
Assets | ||||||
Current assets: | ||||||
Cash and cash equivalents | ||||||
135,897 | 175,126 | 160,990 | 112,584 | 92,748 | 92,432 | 83,141 |
Short-term investments | ||||||
357,026 | 355,407 | 340,254 | 389,840 | 373,392 | 366,952 | 161,080 |
Prepaid expenses and other current assets | ||||||
11,491 | 14,043 | 8,513 | 9,118 | 10,487 | 8,598 | 3,132 |
Total current assets | ||||||
504,414 | 544,576 | 509,757 | 511,542 | 476,627 | 467,982 | 247,353 |
Long-term investments | ||||||
60,121 | 58,322 | 100,702 | 147,769 | 214,588 | 261,966 | 154,045 |
Operating lease right-of-use asset | ||||||
43,836 | 44,495 | 31,437 | 31,880 | 32,394 | 33,015 | 24,996 |
Property and equipment, net | ||||||
66,349 | 56,449 | 45,943 | 35,817 | 20,426 | 8,595 | 4,693 |
Intangible assets, net | ||||||
0 | 151 | 301 | 452 | 603 | 754 | 904 |
Restricted cash | ||||||
4,299 | 4,299 | 4,299 | 4,299 | 4,299 | 1,299 | 937 |
Other long-term assets | ||||||
4,675 | 4,618 | 3,105 | 2,238 | 432 | 244 | 2,307 |
Equity method investment | ||||||
4,800 | 4,892 | - | - | - | 0 | - |
Total assets | ||||||
688,523 | 717,802 | 695,544 | 733,997 | 749,369 | 773,855 | 435,235 |
Liabilities and stockholders’ equity | ||||||
Current liabilities: | ||||||
Accounts payable | ||||||
7,199 | 9,250 | 8,047 | 23,503 | 12,976 | 12,338 | 3,083 |
Accrued and other current liabilities | ||||||
19,619 | 23,829 | 25,307 | 14,497 | 14,289 | 17,121 | 16,779 |
Convertible notes payable | ||||||
- | - | - | - | - | - | 139,615 |
Total current liabilities | ||||||
26,818 | 33,079 | 33,354 | 38,000 | 27,265 | 29,459 | 159,477 |
Lease liability, noncurrent | ||||||
51,536 | 51,349 | 37,689 | 34,867 | 34,811 | 34,456 | 25,661 |
Other long-term liabilities | ||||||
3,650 | 4,351 | 4,785 | 5,495 | 6,065 | 6,776 | 7,488 |
Total liabilities | ||||||
82,004 | 88,779 | 75,828 | 78,362 | 68,141 | 70,691 | 192,626 |
Commitments and Contingencies (Notes 6 and 7) | ||||||
- | - | - | - | - | - | 0 |
Convertible preferred stock, $0.001 par value; no shares and 1,000,000 shares authorized as of December 31, 2018 and December 31, 2017, respectively; no shares issued and outstanding as of December 31, 2018 and December 31, 2017 | ||||||
- | - | - | - | - | - | 411,052 |
Stockholders’ equity: | ||||||
Preferred stock, $0.001 par value: 10,000,000 shares authorized as of March 31, 2020 and December 31, 2019; no shares were issued and outstanding as of March 31, 2020 and December 31, 2019 | ||||||
0 | 0 | 0 | 0 | - | 0 | - |
Common stock, $0.001 par value: 200,000,000 shares authorized as of March 31, 2020 and December 31, 2019; 125,262,537 and 124,267,358 shares issued and outstanding as of March 31, 2020 and December 31, 2019, respectively | ||||||
125 | 124 | 122 | 122 | 121 | 121 | 31 |
Additional paid-in capital | ||||||
1,055,386 | 1,023,876 | 952,820 | 937,709 | 922,816 | 914,265 | 12,693 |
Accumulated deficit | ||||||
-450,600 | -396,122 | -335,100 | -284,357 | -243,114 | -211,528 | -181,019 |
Accumulated other comprehensive income | ||||||
1,610 | 1,145 | 1,866 | 2,161 | 1,405 | 306 | -148 |
Total stockholders’ equity | ||||||
606,519 | 629,023 | 619,716 | 655,635 | 681,228 | 703,164 | -168,443 |
Total liabilities and stockholders’ equity | ||||||
688,523 | 717,802 | 695,544 | 733,997 | 749,369 | 773,855 | 435,235 |