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Balance Sheet Detail (Tables)
 12 Months Ended
Dec. 31, 2023
Consolidated Balance Sheet Detail [Abstract]  
Schedule of Inventories
   December 31, 
   2023   2022 
   (in thousands) 
Inventories:        
Raw materials  $209   $1,279 
Work-in-process   1,517    2,595 
Finished goods   880    1,474 
   $2,606   $5,348 
           
Prepaid expenses and other:          
Prepaid inventory and production costs  $452   $186 
Prepaid insurance   37    77 
Prepaid software   67    173 
Other   28    138 
   $584   $574 
           
Property and equipment, net:          
Machinery and equipment  $4,848   $4,630 
Computer equipment and software   377    342 
Furniture and fixtures   93    93 
Leasehold improvements   428    555 
Total property and equipment   5,746    5,620 
Less: Accumulated depreciation and amortization   (4,590)   (3,395)
   $1,156   $2,225 
Schedule of Accrued Expenses and Other The Company wrote off the remaining book value of approximately $153,000 to depreciation expense as a loss on disposal during the year ended December 31, 2022.
   December 31, 
   2023   2022 
   (in thousands) 
Accrued Expenses & Other:        
Accrued wages and employee benefits  $405   $469 
Professional fees, legal and consulting   158    514 
Financing liability   
—
    330 
Warranty accrual   37    39 
Other   11    465 
   $611   $1,817