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Consolidated Balance Sheet Detail (Tables)
6 Months Ended
Sep. 30, 2025
Consolidated Balance Sheet Detail [Abstract]  
Schedule of Prepaid and Other Current Assets
   September 30,   March 31, 
   2025   2025 
  (in thousands) 
Prepaid and other current assets        
Prepaid expenses  $606   $352 
Other receivables   25    70 
   $                  631   $422 
Schedule of Property and Equipment, Net
   September 30,   March 31, 
   2025   2025 
  (in thousands) 
Property and equipment, net    
Machinery and equipment  $7,904   $5,311 
Computer equipment and software   45    66 
Construction-in-process   788    685 
Leasehold improvements   33    33 
Office equipment   45    45 
                   8,815    6,140 
Less: accumulated depreciation and amortization   (2,356)   (1,687)
Total  $6,459   $4,453 
Schedule of Accrued Expenses
   September 30,
2025
   March 31,
2025
 
   (in thousands) 
Accrued expenses        
Accrued wages and employee benefits  $                  460   $391 
Other   255    113 
Total  $715   $504