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Significant Balance Sheet Components (Tables)
 6 Months Ended 12 Months Ended
Jun. 30, 2025
Dec. 31, 2024
Significant Balance Sheet Components [Abstract]    
Schedule of Prepaid Expenses and Other Current Assets

Prepaid expenses and other current assets at June 30, 2025 and December 31, 2024, consisted of the following (in thousands):

 

   June 30,
2025		   December 31,
2024		 
Prepaid expenses  $433   $1,200 
Deposits   34    46 
Other current assets   700    1,347 
Total prepaid expenses and other current assets  $1,167   $2,593 

Prepaid expenses and other current assets as of December 31, 2024 and 2023, consisted of the following (in thousands):

 

   2024   2023 
Prepaid expenses  $1,200   $1,461 
Deposits   46    149 
Other current assets   1,347    1,893 
Total prepaid expenses and other current assets  $2,593   $3,503 
Schedule of Other Non-Current Assets

Other non-current assets at June 30, 2025 and December 31, 2024, consisted of the following (in thousands):

 

   June 30,
2025		   December 31,
2024		 
Prepaid expenses, non-current  $3,456   $3,474 
Total other non-current assets  $3,456   $3,474 

Other non-current assets as of December 31, 2024 and 2023, consisted of the following (in thousands):

 

   2024   2023 
Prepaid expenses, non-current  $3,474   $3,368 
Total other non-current assets  $3,474   $3,368 
Schedule of Accrued Expenses and Other Current Liabilities

Accrued expenses and other current liabilities at June 30, 2025 and December 31, 2024, consisted of the following (in thousands):

 

   June 30,
2025		   December 31,
2024		 
Accrued professional services  $2,229   $2,091 
Accrued payroll and benefits   168    205 
Accrued interest expense   510    659 
Other accrued expenses   414    544 
Total accrued expenses and other current liabilities  $3,321   $3,499 

Accrued expenses and other current liabilities as of December 31, 2024 and 2023, consisted of the following (in thousands):

 

   2024   2023 
Accrued professional services  $2,091   $714 
Accrued payroll and benefits   205    304 
Accrued interest expense   659    9 
Other accrued expenses   544    26 
Total accrued expenses and other current liabilities  $3,499   $1,053 
Schedule of Property and Equipment, Net  

Property and equipment, net as of December 31, 2024 and 2023, consisted of the following (in thousands):

 

   2024   2023 
Equipment   23    
—
 
Total property and equipment  $23   $
—
 
Less accumulated depreciation   (2)   
—
 
Total property and equipment, net  $21   $
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