Annual report pursuant to Section 13 and 15(d)

Consolidated Statements of Cash Flows

v3.23.1
Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Cash flows from operating activities:    
Net loss $ 92,718 $ 83,009
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation, amortization and other 7,383 6,630
Loss on disposal of property and equipment 66 442
Stock-based compensation expense 11,909 16,631
Interest due on long-term debt 121 146
Amortization of debt discount and accretion related to debt 975 737
Impairment of fixed assets and intangibles 430 0
Accretion of asset retirement obligations 124 135
Changes in operating assets and liabilities:    
Prepaid expenses 458 223
Accounts receivable, related party 0 234
Other assets (438) (289)
Operating lease right-of-use assets and liabilities (550) 243
Accounts payable (1,108) (757)
Accrued liabilities (866) (3,268)
Other liabilities, related party 0 (11,853)
Other liabilities 0 (472)
Deferred revenue (14,810) 47,735
Deferred revenue, related party 0 (3,895)
Net cash used in operating activities (89,024) (30,387)
Cash flows from investing activities:    
Purchases of property and equipment (3,198) (3,996)
Purchase of marketable securities (55,525) (210,994)
Sales of marketable securities 154,040 152,550
Net cash provided by/(used in) investing activities 95,317 (62,440)
Cash flows from financing activities:    
Payments of capital and finance lease obligations 0 (1)
Proceeds from issuance of long-term debt and warrants, net 0 19,828
Proceeds from stock option exercises 33 1,620
Proceeds from issuance of common stock and warrants, net offering expenses 0 71,145
Fees paid on loan modification (298) 0
Net cash provided by/(used in) financing activities (265) 92,592
Net increase/(decrease) in cash, cash equivalents, and restricted cash 6,028 (235)
Cash, cash equivalents and restricted cash, beginning of period 28,651 28,886
Cash, cash equivalents and restricted cash, end of period 34,679 28,651
Reconciliation of cash, cash equivalents and restricted cash    
Cash and cash equivalents 32,190 24,983
Restricted cash included in Other assets $ 2,489 $ 3,668
Restricted Cash and Cash Equivalents, Noncurrent, Statement of Financial Position [Extensible Enumeration] Other assets Other assets
Cash, cash equivalents and restricted cash, end of period $ 34,679 $ 28,651
Supplemental Cash Flow Information    
Cash paid for interest 3,495 2,248
Non-cash right-of-use asset obtained in exchange for operating lease obligation 4,517 0
Non-Cash Investing and Financing Activities    
Fixed asset additions in accounts payable and accrued expenses $ 53 $ 81