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Inventory
9 Months Ended
Sep. 30, 2023
Inventory Disclosure [Abstract]  
Inventory Inventory
Our inventory, net of allowance for obsolescence of $40,000 at September 30, 2023 and $120,000 at December 31, 2022, consisted of the following amounts:

September 30, 2023December 31, 2022
(in thousands)
Raw materials - current$24,587 $21,354 
Work-in-process1,528 2,060 
Inventory - current26,115 23,414 
Raw materials - long term (net of allowance of $40 and $120, respectively)
2,172 1,557 
Inventory - total$28,287 $24,971 

Our long-term inventory consists of raw materials that remain viable but that the Company does not expect to sell or use within one year.
Inventory Allowance

We routinely review our inventory allowance balance to account for slow moving or obsolete inventory costs that may not be recoverable in the future.

A summary of our inventory allowance is as follows:

September 30, 2023December 31, 2022
(in thousands)
Beginning balance$120 $64 
Accruals— 83 
Write-offs(80)(27)
Ending balance$40 $120