Quarterly report pursuant to Section 13 or 15(d)

Revenues - Activity (Details)

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Revenues - Activity (Details) - USD ($)
 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Dec. 31, 2019
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance $ 3,332,000 $ 1,635,000  
Provision related to current period sales 5,256,000 3,713,000  
Credit or payments made during the period (4,266,000) (2,612,000)  
Balance 4,322,000 2,736,000  
Discounts and allowances 6,100,000    
Other accrued liabilities 7,637,000   $ 6,721,000
Accounts receivable and prepaid and other current assets      
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]      
Discounts and allowances 796,000    
Chargebacks, Discounts and Fees      
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance 1,293,000 622,000  
Provision related to current period sales 3,381,000 2,055,000  
Adjustment related to prior period sales (75,000)    
Credit or payments made during the period (2,615,000) (1,682,000)  
Balance 1,984,000 995,000  
Government and Other Rebates      
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance 1,801,000 843,000  
Provision related to current period sales 1,747,000 1,559,000  
Adjustment related to prior period sales (257,000)    
Credit or payments made during the period (1,593,000) (930,000)  
Balance 1,698,000 1,472,000  
Returns      
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance 238,000 170,000  
Provision related to current period sales 128,000 99,000  
Adjustment related to prior period sales 332,000    
Credit or payments made during the period (58,000)    
Balance $ 640,000 $ 269,000