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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands | 9 Months Ended
--- | ---
Sep. 30, 2019 | Sep. 30, 2018
Cash flows from operating activities: |  |
Net loss | $ (71,961) | $ (30,594)
Adjustments to reconcile net loss to net cash used in operating activities: |  |
Depreciation and amortization | 3,508 | 1,555
Share-based compensation | 6,319 | 697
Loss on disposal of assets | 22 | 8
Non-cash interest expense | 182 |
Change in fair value of convertible notes payable | 9,758 |
Changes in operating assets and liabilities: |  |
Prepaid expenses | (1,826) | (8,634)
Accounts receivable | 273 | (6,523)
Other assets and other current assets | (601) | (349)
Accounts payable | 597 | 953
Accrued other expenses and other current liabilities | 4,862 | 2,780
Deferred revenue | (1,592) | 1,296
Net cash used in operating activities | (50,459) | (38,811)
Cash flows from investing activities: |  |
Acquisition of license rights |  | (1,400)
Purchases of property, equipment and software | (19,137) | (4,407)
Proceeds from disposal of assets |  | 15
Net cash used in investing activities | (19,137) | (5,792)
Cash flows from financing activities: |  |
Proceeds from stock option exercises | 440 | 109
Issuance of Series B convertible preferred stock, net of issuance costs |  | 109,741
Deferred offering costs | (2,507) | (481)
Issuance of convertible notes | 39,550 |
Proceeds from IPO, net of underwriting discounts and commissions | 135,185 |
Net cash provided by financing activities | 172,668 | 109,369
Net increase in cash and cash equivalents | 103,072 | 64,766
Cash and cash equivalents—beginning of period | 103,193 | 62,802
Cash and cash equivalents —end of period | 206,265 | 127,568
Supplemental disclosures of noncash financing and investing activities: |  |
Common stock issued on conversion of convertible notes | 49,490 |
Property, equipment and software additions included in accounts payable, accrued expenses and other current liabilities | $ 3,524 | 2,187
Deferred offering costs included in accounts payable, accrued expenses and other current liabilities |  | $ 857

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