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Inventory (Tables)
 6 Months Ended
Jun. 30, 2023
Inventory Disclosure [Abstract]  
Schedule of Inventory
Our inventory, net of allowance for obsolescence of $40,000 at June 30, 2023 and $120,000 at December 31, 2022, consisted of the following amounts:

June 30, 2023December 31, 2022
(in thousands)
Raw materials - current$26,184 $21,354 
Work-in-process1,776 2,060 
Inventory - current27,960 23,414 
Raw materials - long term (net of allowance of $40 and $120, respectively)
2,157 1,557 
Inventory - total$30,117 $24,971 
A summary of our inventory allowance is as follows:

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