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v3.19.3.a.u2

Consolidated Statements of Cash Flows - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Operating Activities |  |  |  |
Net loss |  | $ (55,178) |  | $ (30,055)
Adjustments to reconcile net loss to net cash used in operating activities: |  |  |  |
Stock-based compensation expense |  | 3,204 |  | 2,606
Depreciation and amortization |  | 146 |  | 149
Loss on disposal of property and equipment |  |  |  | 116
Changes in operating assets and liabilities: |  |  |  |
Accounts receivable |  | (15,000) |  |
Prepaid and other assets |  | (490) |  | (2,895)
Accounts payable |  | 3,031 |  | 500
Accrued compensation and other accrued liabilities |  | 5,599 |  | 850
Operating lease liability and right-of-use asset |  | 75 |  |
Deferred revenue |  | 15,000 |  | (6)
Deferred rent |  |  |  | 182
Net cash flows used in operating activities |  | (43,613) |  | (28,553)
Investing Activities |  |  |  |
Proceeds from maturities of short-term investments |  | 157,433 |  | 127,967
Purchase of short-term investments |  | (129,977) |  | (198,912)
Purchases of property and equipment |  | (64) |  | (376)
Net cash flows provided by (used in) investing activities |  | 27,392 |  | (71,321)
Financing Activities |  |  |  |
Payments for the redemption of redeemable convertible notes |  |  |  | (5,082)
Issuance of common stock for secondary public offering, net of issuance costs |  |  |  | 106,762
Issuance of common stock from stock grants and option exercises |  | 327 |  | 107
Proceeds from exercise of warrants |  |  |  | 9,545
Net cash flows provided by financing activities |  | 327 |  | 111,332
Net (decrease) increase in cash, cash equivalents and restricted cash |  | (15,894) |  | 11,458
Cash, cash equivalents and restricted cash at beginning of the period |  | 31,263 | [1] | 19,805
Cash, cash equivalents and restricted cash at end of the period | [1] | 15,369 |  | 31,263
Supplemental Disclosure of Non-Cash Investing and Financing Activities: |  |  |  |
Adoption of ASC 606 |  |  |  | 207
Conversion of redeemable convertible notes to common stock |  |  |  | $ 3
Right-of-use asset and operating lease liability recorded upon the adoption of ASC 842 |  | $ 2,052 |  |
[1] | (a) The following table provides a reconciliation of cash and restricted cash to amounts reported within the consolidated balance sheets:

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