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Revenue Recognition - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended 12 Months Ended
Jun. 30, 2023
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Disaggregation Of Revenue [Line Items]        
Payment period from distributors received from date of sale   45 days    
Net loss per share basic [1]   $ (0.15) $ (0.26) $ 0.02
Net loss per share-diluted [1]   $ (0.15) $ (0.26) $ 0.02
Effect of significant financing component when transfer and customer payment of good or service occurs within one year or less   true    
Edding        
Disaggregation Of Revenue [Line Items]        
Adjusted measure of performance and additional license revenue recognized $ 5.0      
HLS        
Disaggregation Of Revenue [Line Items]        
Adjusted measure of performance and additional license revenue recognized $ 5.3      
Medicaid rebate        
Disaggregation Of Revenue [Line Items]        
Change in estimate recognized   $ 15.1    
Change in net income loss   $ 15.1    
Net loss per share basic   $ (0.18)    
Net loss per share-diluted   (0.18)    
Exclusion of licensing revenue change in estimate        
Disaggregation Of Revenue [Line Items]        
Net loss per share basic   (0.17)    
Net loss per share-diluted   $ (0.17)    
VASCEPA 1-Gram        
Disaggregation Of Revenue [Line Items]        
Product expiration date after being converted into capsule form   4 years    
VASCEPA 0.5-Gram        
Disaggregation Of Revenue [Line Items]        
Product expiration date after being converted into capsule form   3 years    
Minimum        
Disaggregation Of Revenue [Line Items]        
Sales discount percentage   2.00%    
Maximum        
Disaggregation Of Revenue [Line Items]        
Sales discount percentage   3.00%    
[1] Excluding the licensing revenue change in estimate and Medicaid change in estimate, both discussed in Note 12 – Revenue Recognition, net loss per share basic and diluted for the year ended December 31, 2023 would have been $(0.21).