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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Income Statement [Abstract]        
Net sales $ 67,689 $ 63,074 $ 193,466 $ 191,206
Cost of sales 12,188 10,129 33,947 32,530
Gross profit 55,501 52,945 159,519 158,676
Operating expenses:        
Selling, general and administrative 53,475 46,289 158,838 145,291
Research and development 5,953 4,368 17,429 12,770
Investigation, restatement and related 3,001 3,170 8,771 8,304
Amortization of intangible assets 175 193 519 647
Operating loss (7,103) (1,075) (26,038) (8,336)
Other expense, net        
Interest expense, net (1,270) (963) (3,566) (3,806)
Other expense, net 0 0 (1) (3)
Loss before income tax provision (8,373) (2,038) (29,605) (12,145)
Income tax provision expense (53) (301) (178) (355)
Net loss (8,426) (2,339) (29,783) (12,500)
Net loss available to common stockholders - basic (10,096) (3,913) (34,667) (17,039)
Net loss available to common stockholders - diluted $ (10,096) $ (3,913) $ (34,667) $ (17,039)
Net loss per common share - basic (in dollars per share) $ (0.09) $ (0.04) $ (0.31) $ (0.15)
Net loss per common share - diluted (in dollars per share) $ (0.09) $ (0.04) $ (0.31) $ (0.15)
Weighted average common shares outstanding - basic (in shares) 113,448,251 110,717,073 112,650,713 110,136,517
Weighted average common shares outstanding - diluted (in shares) 113,448,251 110,717,073 112,650,713 110,136,517