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v3.21.1

Consolidated Statements of Cash Flows - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Cash flows from operating activities |  |
Net loss | $ (24,597) | $ (19,620)
Adjustments to reconcile net loss to net cash used in operating activities: |  |
Depreciation and amortization | 207 | 231
Amortization of premiums and discounts on marketable securities | 14 | 0
Non-cash lease expense | 272 | 366
Loss on disposal of property and equipment | 0 | 1
Stock-based compensation expense | 1,780 | 1,409
Non-cash interest expense | 387 | 123
Warrant liabilities revaluation | 16,747 | 846
Changes in operating assets and liabilities: |  |
Accounts receivable | (1,118) | 5,000
Prepaid expenses, deposits and other assets | (1,512) | (61)
Accounts payable | 151 | 836
Deferred revenue | (2,728) | 0
Accrued expenses and other liabilities | (1,736) | (829)
Net cash (used in) operating activities | (12,133) | (11,698)
Cash flows from investing activities |  |
Purchases of marketable securities | (22,420) | 0
Purchases of property and equipment | (25) | (135)
Net cash (used in) investing activities | (22,445) | (135)
Cash flows from financing activities |  |
Repayments of principal on outstanding debt | 0 | (2,100)
Net proceeds from issuance of common stock | 20,991 | 1,141
Issuance costs paid for December 2019 financing | 0 | (4,381)
Other financing fees | 0 | (147)
Proceeds from exercise of stock options | 244 | 3
Proceeds from issuance of common stock under Employee Stock Purchase Plan | 72 | 114
Net cash provided by (used in) financing activities | 21,307 | (5,370)
Effect of exchange rate changes on cash | (7) | (84)
Net change in cash, cash equivalents, and restricted cash | (13,278) | (17,287)
Cash, cash equivalents, and restricted cash at beginning of period | 140,064 | 91,551
Cash, cash equivalents, and restricted cash at end of period | 126,786 | 74,264
Supplement cash flow information |  |
Cash paid for interest | 494 | 232
Noncash investing and financing activities |  |
Purchase of property and equipment not yet paid | 10 | 10
Equity offering costs in accrued liabilities | 48 | 42
Unrealized (losses) on marketable securities | $ (1) | $ 0

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