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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)
shares in Thousands, $ in Thousands
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Income Statement [Abstract]    
Revenue, Product and Service [Extensible List] Product [Member]  
Product sales, net $ 35,852 $ 33,627
Other revenue 222 941
Total revenue $ 36,074 34,568
Cost, Product and Service [Extensible List] Product [Member]  
Cost of product sales $ 12,622 11,583
Gross profit 23,452 22,985
Research and development 4,860 3,630
Selling, general and administrative 25,865 22,660
Total operating expenses 30,725 26,290
Loss from operations (7,273) (3,305)
Other income (expense):    
Interest income 88 76
Interest expense (18) (1)
Other income 112 84
Total other income 182 159
Loss before income taxes (7,091) (3,146)
Income tax expense 0 143
Net loss $ (7,091) $ (3,289)
Net loss per common share:    
Basic (in USD per share) $ (0.15) $ (0.07)
Diluted (in USD per share) $ (0.15) $ (0.07)
Weighted-average common shares outstanding:    
Basic (in shares) 46,985 45,984
Diluted (in shares) 46,985 45,984