| Dec'19 | Dec'18 | Dec'17 | Dec'16 | |||
|---|---|---|---|---|---|---|
Operating activities: | ||||||
Net loss | ||||||
-50,422 | -27,115 | -9,157 | -6,019 | |||
Reconciliation of net loss to net cash used in operating activities: | ||||||
Stock-based compensation | ||||||
6,294 | 2,320 | 271 | 270 | |||
Depreciation and amortization | ||||||
887 | 471 | 128 | 92 | |||
Noncash lease expense | ||||||
226 | - | - | - | |||
Accretion of purchase discounts and amortization, net of premiums on investment securities | ||||||
1,229 | 433 | - | - | |||
Other | ||||||
4 | - | - | - | |||
Increase (decrease) in cash resulting from changes in: | ||||||
Prepaid expenses and other current assets | ||||||
2,221 | 1,802 | 783 | 116 | |||
Accounts payable and accrued expenses | ||||||
696 | 7,361 | 47 | 300 | |||
Operating lease liability | ||||||
-608 | - | - | - | |||
Deferred rent | ||||||
- | -261 | 15 | 5 | |||
Net cash used in operating activities | ||||||
-46,381 | -19,459 | -9,479 | -5,468 | |||
Investing activities: | ||||||
Purchases of investment securities | ||||||
108,136 | 118,399 | - | - | |||
Maturities of investment securities | ||||||
150,295 | - | - | - | |||
Purchases of property and equipment | ||||||
492 | 1,059 | 304 | 190 | |||
Net cash provided by investing activities | ||||||
41,667 | -119,458 | -304 | -190 | |||
Financing activities: | ||||||
Proceeds from issuance of convertible preferred stock, net | ||||||
- | 63,275 | 11,969 | -5 | |||
Proceeds from issuance of common stock, net | ||||||
- | 106,472 | - | - | |||
Proceeds from exercise of stock options | ||||||
126 | 451 | 66 | - | |||
Repurchase of unvested shares | ||||||
59 | - | - | - | |||
Repayments of borrowings under long-term debt | ||||||
- | - | 212 | 48 | |||
Net cash provided by financing activities | ||||||
67 | 170,198 | 11,823 | -53 | |||
Net change in cash, cash equivalents and restricted cash | ||||||
-4,647 | 31,281 | 2,040 | -5,711 | |||
Supplemental disclosure of cash flow information: | ||||||
Cash paid for interest | ||||||
- | - | 8 | 11 | |||
Noncash investing and financing activities: | ||||||
Purchase of shares pursuant to Stock Purchase Plan | ||||||
735 | 282 | - | - | |||
Change in unvested stock liability | ||||||
94 | 21 | 2 | 8 | |||
Amounts accrued for purchases of property and equipment | ||||||
112 | 42 | - | - | |||
Tenant improvement allowance | ||||||
- | 3,304 | - | - | |||