v3.21.1
Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Cash flows from operating activities:    
Net loss $ 26,778 $ 22,018
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation, amortization and other 1,509 618
Stock-based compensation expense 4,066 2,192
Amortization of debt discount and accretion related to debt 105 148
Accretion of asset retirement obligations 33 32
Loss on disposal of equipment 36 0
Changes in operating assets and liabilities:    
Prepaid expenses (98) (1,409)
Accounts receivable, related party 234 (892)
Grants revenue receivable 0 (2,341)
Other assets 442 293
Operating lease right-of-use assets and liabilities 28 (60)
Accounts payable (869) 260
Accrued liabilities (3,010) (3,912)
Other liabilities 0 1,746
Other liabilities, related party (265) 7,754
Deferred revenue 67,018 (1,467)
Deferred revenue, related party (237) 907
Net cash provided by/(used in) operating activities 42,214 (18,149)
Cash flows from investing activities:    
Purchases of property and equipment (435) (938)
Purchase of marketable securities (73,652) (50,463)
Sales of marketable securities 33,700 18,450
Net cash used in investing activities (40,387) (32,951)
Cash flows from financing activities:    
Payments of capital and finance lease obligations (1) (7)
Repayment of long-term debt 0 (200)
Proceeds from stock option exercises 597 300
Proceeds from issuance of common stock and warrants, net offering expenses 71,145 0
Net cash provided by financing activities 71,741 93
Net increase/(decrease) in cash, cash equivalents, and restricted cash 73,568 (51,007)
Cash, cash equivalents and restricted cash, beginning of period 28,886 88,451
Cash, cash equivalents and restricted cash, end of period 102,454 37,444
Reconciliation of cash, cash equivalents and restricted cash    
Cash and cash equivalents 98,786 34,444
Restricted cash included in Other assets 3,668 $ 3,000
Restricted Cash and Cash Equivalents, Asset, Statement of Financial Position [Extensible List]   Other Assets
Cash, cash equivalents and restricted cash, end of period 102,454 $ 37,444
Supplemental Cash Flow Information    
Cash paid for interest 317 163
Non-Cash Investing and Financing Activities    
Fixed asset additions in accounts payable and accrued expenses $ 559 $ 944

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