v3.25.0.1
Condensed Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 9 Months Ended 12 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Dec. 31, 2023
Dec. 31, 2022
Cash flows from operating activities:        
Net loss $ (5,369) $ (9,689) $ (11,387) $ (46,214)
Adjustments to reconcile net loss to net cash used in operating activities:        
Depreciation expense 17 114 121 330
Amortization of intangible assets   33 33 1,823
Impairment of long-lived assets   777 777 18,744
Gain on extinguishment of debt (429)      
Gain on disposal of assets, net   (33) (33) 529
Stock-based compensation 169 656 766 2,087
Bad debt expense 61 450 395 (43)
Provision for inventory excess and obsolescence 140 101 335 579
Deferred income tax   1 28 (423)
Gain on changes in fair value of liability warrants (46) (3,850) (3,878)  
Offering cost   298    
Other noncash items 2 12 17 (23)
Change in operating assets and liabilities:        
Accounts and other receivables 256 (422) 125 678
Inventory 667 307 (465) (1,187)
Prepaid expenses and other current assets 119 (329) (172) 1,141
Accounts payable and accrued liabilities 673 (2,764) (3,457) 448
Warranty liability   (182) (182) (371)
Other   17 17  
Net cash used in operating activities (3,740) (14,503) (16,960) (21,902)
Cash flows from investing activities:        
Capital expenditures   (43) (43) (131)
Proceeds from sale of capital assets   33 33 39
Cash used in investing activities:   (10) (10) (92)
Cash flows from financing activities:        
Proceeds from sale and issuance of securities   12,451 13,438 639
Exercise of warrants 24   4,136 2,491
Payments of equity issuance costs   (338)    
Net cash provided by financing activities 24 12,113 17,574 3,130
Effect of currency exchange rate changes on cash and cash equivalents   (6)   4
Net change in cash, cash equivalents and restricted cash (3,716) (2,406) 604 (18,860)
Cash, cash equivalents and restricted cash at beginning of period 4,559 3,955 3,955 22,815
Cash, cash equivalents and restricted cash at end of period 843 1,549 4,559 3,955
Supplemental disclosure:        
Cash paid for income taxes $ 12 $ 2 $ 10 5
Noncash investing and financing activities:        
Capital expenditures accruals       $ 6