| Dec'19 | Dec'18 | Dec'17 | Dec'16 | Dec'15 | Dec'14 | |
|---|---|---|---|---|---|---|
Cash flows from operating activities | ||||||
Net loss | ||||||
-68,345 | -30,965 | -28,943 | -27,201 | -12,210 | -6,000 | |
Adjustments to reconcile net loss to net cash used in operating activities: | ||||||
Stock-based compensation expense | ||||||
6,115 | 1,754 | 2,072 | 2,031 | 803 | 376 | |
Amortization of debt discount | ||||||
649 | 375 | 470 | 68 | 42 | -2,649 | |
Amortization of debt issuance costs | ||||||
- | - | - | - | 7 | 143 | |
Non-cash interest expense | ||||||
- | - | - | - | 698 | 272 | |
Change in fair value of warrants | ||||||
- | -2,791 | 646 | - | 108 | - | |
Change in fair value of warrant and embedded derivative liabilities | ||||||
- | - | - | - | 274 | 124 | |
Loss on extinguishment of debt | ||||||
- | - | - | - | -2,444 | -2,870 | |
Depreciation | ||||||
37 | 48 | 42 | 20 | 3 | - | |
Changes in operating assets and liabilities: | ||||||
Prepaid expenses and other current assets | ||||||
-833 | -32 | -102 | 383 | 870 | 116 | |
Other assets | ||||||
27 | -75 | 75 | 86 | 26 | - | |
Accounts payable | ||||||
7,256 | 251 | -645 | 2,188 | 1,134 | 598 | |
Accrued expenses and other current liabilities | ||||||
7,105 | 1,163 | -140 | 2,080 | 700 | 32 | |
Net cash used in operating activities | ||||||
-46,375 | -30,053 | -26,471 | -21,281 | -7,438 | -4,596 | |
Cash flows from investing activities | ||||||
Purchases of equipment | ||||||
16 | 32 | 9 | 104 | 20 | - | |
Net cash used in investing activities | ||||||
-16 | -32 | -9 | -104 | -20 | - | |
Cash flows from financing activities | ||||||
Payment of debt issuance costs | ||||||
- | 25 | - | 64 | 12 | 25 | |
Deferred financing fees | ||||||
- | - | - | - | - | 42 | |
Proceeds from issuance of initial public offering, net | ||||||
- | - | - | - | 45,549 | - | |
Procceds from issuance of common stock upon financing, net | ||||||
238,233 | 12,881 | 23,677 | - | - | - | |
Receipt of subscription receivable | ||||||
- | - | - | - | - | 5 | |
Proceeds from issuance of common stock upon exercise of options | ||||||
1,143 | 380 | 316 | - | - | - | |
Proceeds from issuance of convertible notes | ||||||
- | - | - | - | 7,382 | 5,209 | |
Proceeds from issuance of term loan | ||||||
20,000 | - | - | 10,000 | - | - | |
Repayment of principal on term loan | ||||||
7,238 | 3,333 | 277 | - | - | - | |
Proceeds issuance of common stock upon exercise of warrants | ||||||
249 | 131 | 167 | 33 | - | - | |
Payment of loan from related party | ||||||
- | - | - | - | 41 | 21 | |
Net cash (used in) provided by financing activities | ||||||
252,388 | 10,034 | 23,884 | 9,968 | 52,877 | 5,126 | |
Net (decrease) increase in cash | ||||||
205,997 | -20,052 | -2,597 | -11,417 | 45,418 | 529 | |
Supplemental disclosures of cash flow information: | ||||||
Interest paid | ||||||
1,287 | 771 | 865 | 46 | - | - | |
Supplemental disclosures of non-cash financing activity: | ||||||
Establishment of warrant liabilities in connection with common stock issuance | ||||||
- | - | 2,145 | - | - | - | |
Issuance of warrants in connection with debt financing | ||||||
387 | 37 | - | 264 | - | - | |
Warrants issued for debt financing and offering costs | ||||||
- | - | - | - | - | 79 | |
Conversion of convertible notes to common stock | ||||||
- | - | - | - | 15,302 | 4,443 | |