| Mar'20 | Dec'19 | Sep'19 | Jun'19 | Mar'19 | Dec'18 | Sep'18 | Jun'18 | Mar'18 |
|---|---|---|---|---|---|---|---|---|
Operating activities: | ||||||||
Net loss | ||||||||
-17,360 | -14,549 | -14,430 | -12,427 | -9,016 | -8,495 | -7,588 | -5,568 | -5,464 |
Reconciliation of net loss to net cash used in operating activities: | ||||||||
Stock-based compensation | ||||||||
2,147 | 1,831 | 1,854 | 1,581 | 1,028 | 847 | 775 | 272 | 426 |
Depreciation and amortization | ||||||||
235 | 229 | 228 | 230 | 200 | 208 | 139 | 76 | 48 |
Noncash lease expense | ||||||||
65 | 60 | 57 | 56 | 53 | - | - | - | - |
Accretion of purchase discounts and amortization, net of premiums on investment securities | ||||||||
180 | 220 | 320 | 289 | 400 | - | - | - | - |
Other | ||||||||
19 | 7 | -1 | 1 | -3 | - | 65 | -74 | -2 |
Increase (decrease) in cash resulting from changes in: | ||||||||
Prepaid expenses and other current assets | ||||||||
-663 | 1,298 | 947 | 881 | -905 | 632 | -105 | 985 | 290 |
Accounts payable and accrued expenses | ||||||||
2,391 | 674 | 114 | -675 | 583 | 2,881 | 828 | 1,781 | 1,871 |
Operating lease liability | ||||||||
-172 | -167 | -164 | -162 | -115 | - | - | - | - |
Net cash used in operating activities | ||||||||
-12,230 | -13,447 | -13,607 | -12,568 | -6,759 | -6,009 | -5,693 | -4,350 | -3,407 |
Investing activities: | ||||||||
Purchases of investment securities | ||||||||
22,886 | 41,066 | 14,406 | 21,101 | 31,563 | - | - | - | - |
Maturities of investment securities | ||||||||
39,285 | 28,271 | 34,854 | 30,600 | 56,570 | - | - | - | - |
Purchases of property and equipment | ||||||||
60 | 28 | 0 | 56 | 408 | 282 | 251 | 469 | 57 |
Net cash provided by investing activities | ||||||||
16,339 | -12,823 | 20,448 | 9,443 | 24,599 | -118,681 | -251 | -469 | -57 |
Financing activities: | ||||||||
Proceeds from issuance of convertible preferred stock, net | ||||||||
- | - | - | - | - | 9 | 0 | -127 | 63,393 |
Proceeds from issuance of common stock, net | ||||||||
6,427 | - | - | - | - | - | - | - | - |
Proceeds from exercise of stock options | ||||||||
55 | 17 | 22 | 67 | 20 | 0 | 58 | 140 | 253 |
Payment of initial public offering costs | ||||||||
- | - | - | - | - | - | - | 526 | 134 |
Net cash provided by financing activities | ||||||||
6,482 | 17 | 22 | 8 | 20 | 9 | 107,190 | -513 | 63,512 |
Net change in cash, cash equivalents and restricted cash | ||||||||
10,591 | -26,253 | 6,863 | -3,117 | 17,860 | -124,681 | 101,246 | -5,332 | 60,048 |
Noncash investing and financing activities: | ||||||||
Change in unvested stock liability | ||||||||
10 | 177 | -12 | -124 | 53 | 35 | -7 | -4 | -3 |
Amounts accrued for purchases of property and equipment | ||||||||
- | - | - | - | 27 | -104 | 94 | -15 | 67 |
Change in accrued preferred stock issuance and initial public offering costs | ||||||||
- | - | - | - | - | - | - | - | 301 |