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Condensed Consolidated Statements of Operations (Unaudited) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Revenue, net $ 53,030 $ 52,242
Cost of goods sold 43,786 43,217
Gross profit 9,244 9,025
Operating expenses    
Research and development 8,536 9,486
Sales and marketing 2,327 2,558
General and administrative 12,548 11,220
Total operating expenses 23,411 23,264
Loss from operations (14,167) (14,239)
Other income (expense)    
Interest income 33 28
Interest expense (2,137) (1,401)
Other expense, net (21) (450)
Total other income (expense), net (2,125) (1,823)
Loss before income taxes (16,292) (16,062)
Net loss $ (16,292) $ (16,062)
Net loss per share    
Basic (in dollars per share) $ (0.56) $ (0.58)
Diluted (in dollars per share) $ (0.56) $ (0.58)
Weighted average shares used to compute net loss per share:    
Basic (in shares) 28,871,857 27,463,321
Diluted (in shares) 28,871,857 27,463,321