| Mar'20 | Dec'19 | Sep'19 | Jun'19 | Mar'19 | Dec'18 | Sep'18 | Jun'18 | Mar'18 | Dec'17 | Sep'17 | Jun'17 | Mar'17 | Dec'16 | Sep'16 | Jun'16 | Mar'16 | Dec'15 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
ASSETS | |||||||||||||||||
CURRENT ASSETS | |||||||||||||||||
Cash and cash equivalents | |||||||||||||||||
12,594 | 19,253 | 24,545 | 25,430 | 85,645 | 22,461 | 14,532 | 20,579 | 10,760 | 12,817 | 13,162 | 26,934 | 16,801 | 47,748 | 49,544 | 70,628 | 24,016 | 29,294 |
Marketable securities | |||||||||||||||||
36,398 | 52,696 | 64,155 | 80,111 | - | 52,052 | - | - | - | - | - | - | - | - | - | - | - | - |
Marketable securities | |||||||||||||||||
- | - | - | - | 38,070 | - | 50,203 | 51,614 | 32,715 | 37,482 | 42,587 | 36,459 | 41,067 | 15,754 | 18,491 | 2,947 | 4,970 | 3,768 |
Restricted cash | |||||||||||||||||
- | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 155 | 80 | 80 |
Accounts receivable - grant | |||||||||||||||||
- | - | - | - | - | - | 2,422 | 4,281 | 3,373 | 3,078 | 2,452 | 1,213 | 981 | 1,215 | 1,571 | 1,625 | 1,618 | 1,697 |
Deferred offering costs | |||||||||||||||||
- | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 3,195 | 2,535 |
Prepaid expenses and other current assets | |||||||||||||||||
5,273 | 2,556 | 3,930 | 4,394 | 3,103 | 2,158 | 3,225 | 2,414 | 1,995 | 1,614 | 1,318 | 1,597 | 1,456 | 1,707 | 2,073 | 1,551 | 1,325 | 912 |
Total current assets | |||||||||||||||||
54,265 | 74,505 | 92,630 | 109,935 | 126,818 | 76,671 | 70,382 | 78,888 | 48,843 | 54,991 | 59,519 | 66,203 | 60,305 | 66,424 | 71,679 | 76,906 | 35,204 | 38,286 |
Restricted cash | |||||||||||||||||
1,500 | 1,500 | 1,500 | 1,500 | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
Property and equipment, net | |||||||||||||||||
4,244 | 2,385 | 980 | 921 | 952 | 1,018 | 846 | 776 | 810 | 854 | 844 | 802 | 822 | 599 | 342 | 377 | 321 | 348 |
Operating lease right-of-use assets | |||||||||||||||||
4,712 | 4,726 | 4,872 | 5,018 | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
Other non-current assets | |||||||||||||||||
60 | 67 | 114 | 120 | 749 | 50 | 49 | 49 | 133 | 232 | 139 | 139 | 140 | 40 | 40 | 18 | 18 | 20 |
TOTAL ASSETS | |||||||||||||||||
64,781 | 83,183 | 100,096 | 117,494 | 128,519 | 77,739 | 71,277 | 79,713 | 49,786 | 56,077 | 60,502 | 67,144 | 61,267 | 67,063 | 72,061 | 77,301 | 35,543 | 38,654 |
LIABILITIES AND STOCKHOLDERS’ EQUITY | |||||||||||||||||
CURRENT LIABILITIES | |||||||||||||||||
Accounts payable | |||||||||||||||||
3,618 | 3,154 | 2,431 | 2,724 | 3,223 | 663 | 1,077 | 952 | 763 | 389 | 615 | 634 | 267 | 168 | 523 | 348 | 509 | 176 |
Operating lease liabilities | |||||||||||||||||
293 | 351 | 289 | 328 | 317 | - | - | - | - | - | - | - | - | - | - | - | - | - |
Deferred revenue | |||||||||||||||||
- | - | - | - | - | - | 0 | 0 | 0 | 20 | 50 | 71 | 51 | 71 | 181 | - | - | 0 |
Accrued and other current liabilities | |||||||||||||||||
13,227 | 14,854 | 12,676 | 9,967 | 8,266 | 9,576 | 6,438 | 5,223 | 5,002 | 5,220 | 4,212 | 3,713 | 3,639 | 3,726 | 3,133 | 3,013 | 3,311 | 2,347 |
Total current liabilities | |||||||||||||||||
17,138 | 18,359 | 15,396 | 13,019 | 11,806 | 10,239 | 7,515 | 6,175 | 5,765 | 5,629 | 4,877 | 4,418 | 3,957 | 3,965 | 3,837 | 3,361 | 3,820 | 2,523 |
Non-current operating lease liabilities | |||||||||||||||||
4,815 | 4,712 | 4,867 | 4,815 | 372 | - | - | - | - | - | - | - | - | - | - | - | - | - |
Other non-current liabilities | |||||||||||||||||
23 | 31 | 38 | 45 | 52 | 72 | 81 | 91 | 101 | 111 | 117 | 122 | 127 | 132 | 26 | 16 | 22 | 27 |
TOTAL LIABILITIES | |||||||||||||||||
21,976 | 23,102 | 20,301 | 17,879 | 12,230 | 10,311 | 7,596 | 6,266 | 5,866 | 5,740 | 4,994 | 4,540 | 4,084 | 4,097 | 3,863 | 3,377 | 3,842 | 2,550 |
Commitments and Contingencies (Note 8) | |||||||||||||||||
- | - | - | - | - | - | 0 | 0 | 0 | - | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
STOCKHOLDERS’ EQUITY | |||||||||||||||||
Preferred stock, $0.0001 par value; 10,000,000 shares authorized as of March 31, 2020 and December 31, 2019; no shares issued and outstanding as of March 31, 2020 and December 31, 2019 | |||||||||||||||||
- | - | - | - | - | - | 0 | 0 | 0 | - | 0 | 0 | 0 | 0 | 0 | 0 | - | 0 |
Common stock, $0.0001 par value; 500,000,000 shares authorized as of March 31, 2020 and December 31, 2019; 29,147,461 shares and 29,084,437 shares issued and outstanding as of March 31, 2020 and December 31, 2019, respectively | |||||||||||||||||
3 | 3 | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 0 | - |
Additional paid-in capital | |||||||||||||||||
256,779 | 255,142 | 253,334 | 251,592 | - | 184,314 | - | - | - | - | - | - | - | - | - | - | - | - |
Additional paid-in capital | |||||||||||||||||
- | - | - | - | 250,301 | - | 165,675 | 163,547 | 124,648 | 122,950 | 121,568 | 120,787 | 108,743 | 108,246 | 107,988 | 107,478 | 1,513 | 1,373 |
Accumulated other comprehensive (loss) income | |||||||||||||||||
-134 | 51 | 78 | 67 | 13 | -27 | -33 | -56 | -98 | -102 | -32 | -29 | -37 | -4 | 3 | 1 | 3 | -1 |
Accumulated deficit | |||||||||||||||||
-213,800 | -195,115 | -173,600 | -152,000 | -134,028 | -116,861 | -101,963 | -90,046 | -80,632 | -72,513 | -66,030 | -58,156 | -51,524 | -45,277 | -39,794 | -33,556 | -28,126 | -23,579 |
TOTAL STOCKHOLDERS’ EQUITY | |||||||||||||||||
42,805 | 60,081 | 79,795 | 99,615 | 116,289 | 67,428 | 63,681 | 73,447 | 43,920 | 50,337 | 55,508 | 62,604 | 57,183 | 62,966 | 68,198 | 73,924 | -26,610 | -22,207 |
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY | |||||||||||||||||
64,781 | 83,183 | 100,096 | 117,494 | 128,519 | 77,739 | 71,277 | 79,713 | 49,786 | 56,077 | 60,502 | 67,144 | 61,267 | 67,063 | 72,061 | 77,301 | 35,543 | 38,654 |