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Inventory (Tables)
3 Months Ended
Mar. 31, 2023
Inventory Disclosure [Abstract]  
Schedule of Inventory
Our inventory, net of allowance for obsolescence of $40,000 at March 31, 2023 and $120,000 at December 31, 2022, consisted of the following amounts:

March 31, 2023December 31, 2022
(in thousands)
Raw materials - current$24,281 $21,354 
Work-in-process796 2,060 
Inventory - current25,077 23,414 
Raw materials - long term (net of allowances of $40 and $120, respectively)
1,588 1,557 
Inventory - total$26,665 $24,971 
A summary of our inventory allowance is as follows:

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