Statements of Cash Flows - USD ($)
$ in Thousands |
12 Months Ended |
Dec. 31, 2018 |
Dec. 31, 2017 |
| Cash flows from operating activities: |
|
|
| Net loss |
$ (53,281)
|
$ (32,068)
|
| Adjustments to reconcile net loss to net cash used in operating activities: |
|
|
| Depreciation and amortization expense |
457
|
405
|
| Stock-based compensation expense |
3,318
|
901
|
| Changes in operating assets and liabilities: |
|
|
| Prepaid expenses and other assets |
(260)
|
(1,355)
|
| Accounts receivable |
359
|
(448)
|
| Accounts payable |
418
|
(124)
|
| Accrued expenses and other liabilities |
1,541
|
(46)
|
| Net cash used in operating activities |
(47,448)
|
(32,735)
|
| Cash flows from investing activities: |
|
|
| Purchases of property and equipment |
(407)
|
(1,577)
|
| Net cash used in investing activities |
(407)
|
(1,577)
|
| Cash flows from financing activities: |
|
|
| Payment of deferred issuance costs associated with Series B convertible preferred stock financing |
(232)
|
|
| Proceeds from stock options exercised |
101
|
|
| Proceeds from initial public offering, net of underwriters discounts |
109,517
|
|
| Payment of deferred offering costs |
(3,012)
|
|
| Net cash provided by financing activities |
106,374
|
109,968
|
| Net increase in cash, cash equivalents and restricted cash |
58,519
|
75,656
|
| Cash, cash equivalents and restricted cash, at beginning of period |
92,609
|
16,953
|
| Cash, cash equivalents and restricted cash, at end of period |
$ 151,128
|
92,609
|
| Supplemental disclosure of non-cash investing and financing activities: |
|
|
| Series B convertible preferred stock financing costs not yet paid |
|
232
|
| Series A-2 |
|
|
| Cash flows from financing activities: |
|
|
| Proceeds from issuance of convertible preferred stock, net issuance of costs |
|
39,979
|
| Series B |
|
|
| Cash flows from financing activities: |
|
|
| Proceeds from issuance of convertible preferred stock, net issuance of costs |
|
$ 69,989
|