| Mar'20 | Dec'19 | Sep'19 | Jun'19 | Mar'19 | Dec'18 | Sep'18 | Jun'18 | Mar'18 |
|---|---|---|---|---|---|---|---|---|
Cash flows from operating activities: | ||||||||
Net loss | ||||||||
-25,444 | -24,208 | -21,149 | -20,767 | -19,426 | -19,944 | -15,938 | -11,941 | -12,102 |
Adjustments to reconcile net loss to net cash used in operating activities: | ||||||||
Depreciation and amortization expense | ||||||||
147 | 194 | 200 | 196 | 168 | 147 | 142 | 138 | 135 |
Stock-based compensation expense | ||||||||
2,559 | 1,852 | 1,948 | 1,797 | 1,313 | 1,436 | 1,244 | 687 | 585 |
Non-cash interest expense | ||||||||
202 | 201 | 148 | 140 | 18 | 0 | 0 | 12 | 33 |
Amortization and accretion on marketable securities | ||||||||
-156 | -53 | -122 | -311 | -212 | - | - | - | - |
Change in fair value of preferred stock warrant liability | ||||||||
- | - | - | - | - | 0 | 12 | 163 | -65 |
Changes in operating assets and liabilities: | ||||||||
Prepaid expenses and other current assets | ||||||||
-238 | -89 | 578 | -129 | -128 | -826 | 1,472 | 176 | 571 |
Operating lease, right-of-use assets | ||||||||
642 | 924 | 923 | 771 | 690 | - | - | - | - |
Accounts payable | ||||||||
-3,720 | 2,356 | -1,424 | -967 | 1,768 | 1,270 | 1,932 | -1,013 | 562 |
Accrued expenses and other current liabilities | ||||||||
60 | 2,526 | 1,782 | 1,985 | -2,116 | 2,785 | 1,266 | 1,466 | -333 |
Operating lease liabilities | ||||||||
558 | 839 | 838 | 820 | 664 | - | - | - | - |
Deferred rent | ||||||||
- | - | - | - | - | -40 | -40 | -6 | -41 |
Other assets | ||||||||
- | - | - | - | - | 0 | 0 | 0 | -18 |
Net cash used in operating activities | ||||||||
-26,030 | -16,958 | -19,110 | -17,847 | -18,333 | -13,520 | -12,854 | -10,670 | -11,779 |
Cash flows from investing activities: | ||||||||
Purchase of marketable securities | ||||||||
135,161 | 49,567 | 1,995 | 0 | 63,123 | - | - | - | - |
Purchases of property and equipment | ||||||||
38 | 16 | 214 | 235 | 234 | 352 | 82 | 21 | 21 |
Proceeds from maturities and sales of marketable securities | ||||||||
16,450 | - | - | - | - | - | - | - | - |
Net cash used in investing activities | ||||||||
-118,749 | -39,483 | 32,866 | 20,365 | -63,357 | -352 | -82 | -21 | -21 |
Cash flows from financing activities: | ||||||||
Proceeds from issuance of convertible preferred stock, net of issuance costs | ||||||||
- | - | - | - | - | 0 | 0 | 31,238 | 68,368 |
Proceeds from issuance of long-term debt | ||||||||
- | 1 | 9,999 | 1 | 19,649 | - | - | - | - |
Payment of debt issuance costs | ||||||||
- | 0 | 0 | 0 | 125 | - | - | - | - |
Payments on long-term debt, including final payment | ||||||||
- | - | - | - | - | 0 | 1,188 | 1,771 | 1,739 |
Proceeds from repayment of promissory notes issued upon early exercise of stock options | ||||||||
- | - | - | - | - | 0 | 0 | 0 | 290 |
Payments of initial public offering costs | ||||||||
- | - | - | - | - | 114 | 1,669 | 1,834 | 21 |
Proceeds from issuance of common stock upon stock option exercises | ||||||||
911 | 4,913 | 34 | 77 | 21 | - | - | - | - |
Net cash provided by financing activities | ||||||||
911 | 311,796 | 10,178 | 78 | 19,545 | -11 | 53,054 | 27,729 | 66,898 |
Net decrease in cash, cash equivalents and restricted cash | ||||||||
-143,868 | 255,355 | 23,934 | 2,596 | -62,145 | -13,883 | 40,118 | 17,038 | 55,098 |
Supplemental disclosure of cash flow information: | ||||||||
Interest paid | ||||||||
648 | - | - | - | - | 0 | 26 | 12 | 67 |
Supplemental disclosure of noncash investing and financing information: | ||||||||
Purchases of property and equipment included in accounts payable and accrued expenses | ||||||||
5 | - | - | -175 | 216 | - | - | - | 15 |
Vesting of common stock subject to repurchase | ||||||||
- | - | - | - | - | 0 | 1 | 0 | 3 |
Deferred offering costs included in accounts payable and accrued expenses | ||||||||
- | - | - | - | - | - | -921 | 650 | 385 |