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Balance Sheet Components (Tables)
 9 Months Ended
Sep. 30, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Schedule of Prepaid and Other Current Assets
Prepaid and other current assets consisted of the following (in thousands):
September 30,
2024		December 31,
2023
License fees$16 $158 
Prepaid rent
11 277 
Other355 293 
Total$382 $728 
Schedule of Property and Equipment, Net
Property and equipment, net, consisted of the following (in thousands):
September 30,
2024		December 31,
2023
Equipment$4,914 $3,155 
Leasehold improvements362 362 
Vehicles700 395 
Computers54 56 
Furniture and fixtures3 3 
Construction-in-progress727 77 
Total6,760 4,048 
Less: accumulated depreciation(1,444)(919)
Property and equipment, net$5,316 $3,129 
Schedule of Intangible Assets, Net
Intangible assets, net, consists of the following (in thousands):
September 30,
2024		December 31,
2023
Patents$1,800 $1,800 
Research license375 375 
Customer relationships4 4 
Total2,179 2,179 
Less: accumulated amortization(966)(797)
Intangible assets, net$1,213 $1,382 
Schedule of Estimated Amortization of Intangible Assets
The following table represents the total estimated amortization of intangible assets for the five succeeding years and thereafter as of September 30, 2024 (in thousands):
Estimated
 Amortization
 Expense
2024 (remaining)$55 
2025220 
2026183 
2027180 
2028180 
Thereafter395 
Total$1,213 
Schedule of Deferred Debt Issuance Costs
Deferred debt issuance costs consist of the following (in thousands):
September 30,
2024		December 31,
2023
Standing letter of credit$150 $150 
Equity letter of credit554 554 
Line of credit9,943 9,943 
Total10,647 10,647 
Accumulated amortization(10,424)(9,341)
Deferred debt issuance costs$223 $1,306 
Schedule of Accrued Expenses
Accrued expenses consisted of the following (in thousands):
September 30,
2024		December 31,
2023
Payroll and related expenses$109 $112 
Bonus— 1,000 
Other expenses808 82 
Total$917 $1,194