| Dec'19 | Dec'18 | Dec'17 | ||||
|---|---|---|---|---|---|---|
Cash flows from operating activities: | ||||||
Net loss | ||||||
-43,850 | -32,952 | -29,923 | ||||
Adjustments to reconcile net loss to net cash used in operating activities: | ||||||
Depreciation and amortization expense | ||||||
142 | 164 | 194 | ||||
Stock-based compensation expense | ||||||
2,421 | 1,201 | 420 | ||||
Loss on disposal of property and equipment | ||||||
- | -282 | - | ||||
Amortization and accretion of investments | ||||||
686 | 21 | - | ||||
Changes in operating assets and liabilities: | ||||||
Grants receivable | ||||||
-474 | 984 | 722 | ||||
Prepaid expenses | ||||||
3,206 | 860 | - | ||||
Other assets | ||||||
2,711 | 637 | - | ||||
Prepaid expenses and other assets | ||||||
- | - | 345 | ||||
Accounts payable | ||||||
-30 | 133 | 447 | ||||
Due to related party | ||||||
- | - | -620 | ||||
Accrued expenses and other liabilities | ||||||
2,878 | -2,280 | 3,386 | ||||
Deferred rent | ||||||
-175 | 137 | 4 | ||||
Net cash used in operating activities | ||||||
-44,743 | -35,817 | -27,159 | ||||
Cash flows from investing activities: | ||||||
Purchases of property and equipment | ||||||
105 | 370 | 286 | ||||
Proceeds from maturities of short-term investments | ||||||
56,415 | - | - | ||||
Purchases of short-term investments | ||||||
44,950 | 35,721 | - | ||||
Net cash provided by (used in) investing activities | ||||||
11,360 | -36,091 | -286 | ||||
Cash flows from financing activities: | ||||||
Proceeds from the sale of shares under common stock purchase agreement, net of issuance costs | ||||||
155 | - | - | ||||
Proceeds from issuance of redeemable convertible preferred stock, net of issuance costs | ||||||
- | - | 56,531 | ||||
Proceeds from exercise of stock options | ||||||
52 | 96 | 56 | ||||
Proceeds from initial public offering, net of issuance costs paid in the period | ||||||
- | 66,071 | -297 | ||||
Payments of initial public offering costs | ||||||
150 | - | - | ||||
Net cash used in financing activities | ||||||
57 | 66,167 | 56,290 | ||||
Net increase (decrease) in cash and cash equivalents | ||||||
-33,326 | -5,741 | 28,845 | ||||
Supplemental disclosure of non-cash investing and financing activities: | ||||||
Purchases of property and equipment included in accounts payable | ||||||
- | 37 | 190 | ||||
Commitment shares issued in connection with common stock purchase agreement | ||||||
642 | - | - | ||||
Initial public offering costs included in accounts payable and accrued expenses | ||||||
- | 150 | - | ||||
Deferred offering costs included in accounts payable and accrued expenses | ||||||
- | - | 1,468 | ||||
Conversion of preferred stock into common stock upon initial public offering | ||||||
- | 104,713 | - | ||||
Supplemental disclosure of cash flow information: | ||||||
Cash paid for taxes | ||||||
677 | 472 | - | ||||