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Inventory
9 Months Ended
Sep. 30, 2022
Inventory Disclosure [Abstract]  
Inventory Inventory
Our inventory, net of allowance for obsolescence of $37,000 at September 30, 2022 and $64,000 at December 31, 2021, consisted of the following amounts:
September 30, 2022December 31, 2021
(in thousands)
Raw materials - current$18,608 $17,528 
Work-in-process3,153 1,801 
Inventory - current21,761 19,329 
Raw materials - long term (net of allowances of $37 and $64, respectively)
1,726 1,582 
Inventory - total$23,487 $20,911 

Our long-term inventory consists of raw materials that remain viable but that the Company does not expect to sell or use within the 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, 2022December 31, 2021
(in thousands)
Beginning balance$64 $221 
Accruals— 208 
Write-offs(27)(365)
Ending balance$37 $64