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Inventory (Tables)
9 Months Ended
Sep. 30, 2022
Inventory Disclosure [Abstract]  
Schedule of 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 
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