v3.25.2
Segment Information (Details)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2025
USD ($)
Mar. 31, 2025
USD ($)
Jun. 30, 2024
USD ($)
Mar. 31, 2024
USD ($)
Jun. 30, 2025
USD ($)
segment
Jun. 30, 2024
USD ($)
Segment Reporting Information [Line Items]            
Number of operating segments | segment         1  
Service revenue $ 191   $ 1,209   $ 513 $ 1,722
Cost of revenue 2   0   2 0
Gross profit 189   1,209   511 1,722
Operating expenses:            
Research and development expenses 2,193   2,850   4,108 5,526
Selling, general and administrative expenses 3,940   5,323   8,532 11,487
Total operating expenses 6,133   8,173   12,640 17,013
Loss from operations (5,944)   (6,964)   (12,129) (15,291)
Other income (expense), net:            
Realized loss on disposal of assets 0   (55)   0 (55)
Interest income 2   4   6 22
Interest expense (91)   0   65 (57)
Gain on debt extinguishment 13   0   71 0
Change in fair value of convertible debt carried at fair value (835)   0   (835) 0
Other income (expense) 405   (1)   200 52
Total other income (expense), net (506)   (52)   (493) (38)
Net loss (6,450) $ (6,172) (7,016) $ (8,313) (12,622) (15,329)
Reportable Segment            
Segment Reporting Information [Line Items]            
Service revenue 191   1,209   513 1,722
Cost of revenue 2   0   2 0
Gross profit 189   1,209   511 1,722
Operating expenses:            
Research and development expenses 2,193   2,850   4,108 5,526
Selling, general and administrative expenses 3,940   5,323   8,532 11,487
Total operating expenses 6,133   8,173   12,640 17,013
Loss from operations (5,944)   (6,964)   (12,129) (15,291)
Other income (expense), net:            
Realized loss on disposal of assets 0   (55)   0 (55)
Interest income 2   4   6 22
Interest expense (91)   0   65 (57)
Gain on debt extinguishment 13   0   71 0
Change in fair value of convertible debt carried at fair value (835)   0   (835) 0
Other income (expense) 405   (1)   200 52
Total other income (expense), net (506)   (52)   (493) (38)
Net loss $ (6,450)   $ (7,016)   $ (12,622) $ (15,329)