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BALANCE SHEET DETAILS - CURRENT ASSETS AND CURRENT LIABILITIES (Tables)
 12 Months Ended
Dec. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Summary of Inventories, Net
Inventories, net
The following table shows the components of inventory (in thousands):
 
    
December 31, 2023
     
December 31, 2022
  
Raw materials
    $ 5,022      $ 3,377  
Finished goods
      16        115  
  
 
 
     
 
 
  
Total inventories
   
 
5,038
 
   
 
3,492
 
  
 
 
     
 
 
  
Allowance for obsolete inventory
      (4 )       (211 ) 
  
 
 
     
 
 
  
Inventories, net
   
 
5,034
 
   
 
3,281
 
  
 
 
     
 
 
  
Summary of Prepaid Expenses and Other Current Assets
Prepaid expenses and other current assets
The following table shows the components of prepaid expenses and other current assets (in thousands):
 
    
December 31, 2023
     
December 31, 2022
  
Prepaid expenses:
      
ERC benefits receivable
    $ —       $ 2,117  
Deposits on inventory
      2,146        680  
Prepaid income tax
      362        —   
Prepaid insurance
      1,110        358  
Prepaid rent
      372        381  
Prepaid equipment
      331        179  
Prepaid other
      214        173  
Other current assets:
      
Interest rate swap asset
    $ —       $ 476  
Other
      18        17  
  
 
 
     
 
 
  
Total
   
$
4,553
 
   
$
4,381
 
  
 
 
     
 
 
  
Summary of Accrued Expenses and Other Current Liabilities
Accrued expenses and other current liabilities
The following table shows the components of accrued expenses and other current liabilities (in thousands):
 
    
December 31, 2023
     
December 31, 2022
  
Accrued expenses:
      
Accrued compensation and related benefits
    $ 4,999      $ 3,392  
Accrued insurance
      978        525  
Accrued transaction advisory fees
      1,000        —   
Accrued professional services
      189        509  
Accrued interest
      58        62  
Accrued property taxes
      60        41  
Accrued monitoring fee
      373     
Other
      147        38  
Other current liabilities:
      
Income tax payable
    $ 1,586      $ 1,780  
Sales tax payable
      71        587  
Unbilled
lost-in-hole
revenue
      76        282  
Deferred revenue
      1,042        83  
Total accrued expenses and other current liabilities
   
$
10,579
 
   
$
7,299