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Condensed Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Operating activities:    
Net loss $ (7,904) $ (7,636)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation expense 88 125
Stock-based compensation expense 1,318 446
Non-cash lease expense 439 432
Non-cash interest and other expense, net 48 53
Changes in operating assets and liabilities:    
Prepaid expenses and other assets (38) (28)
Accounts payable 206 12
Accrued expenses and other liabilities (1,001) (1,214)
Interest payable (3) 7
Operating lease liabilities (339) (500)
Cash used in operating activities (7,186) (8,303)
Investing activities:    
Purchase of property and equipment (168) (46)
Cash used in investing activities (168) (46)
Financing activities:    
Proceeds from the issuance of common stock in connection with at-the-market offering, net of issuance costs 253 44
Proceeds from the issuance of common stock under equity plan awards 197 0
Cash provided by financing activities 450 44
Net decrease in cash, cash equivalents and restricted cash (6,904) (8,305)
Cash, cash equivalents and restricted cash at beginning of period 39,673 31,598
Cash, cash equivalents and restricted cash at end of period 32,769 23,293
Supplemental disclosure of cash flow information:    
Cash paid for interest 326 292
Cash paid for business taxes $ 0 $ 24