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Revenue Recognition (Tables)
 6 Months Ended
Jun. 30, 2019
Revenue Recognition [Abstract]  
Summary of Product Revenue Allowance and Reserve Categories The following table summarizes balances and activity in each of the product revenue allowance and reserve categories for the six months ended June 30, 2019 (in thousands):

 

 

Chargebacks, distribution

fees, discounts and

other fees

 

 

Returns

 

 

Total

 

Balance at December 31, 2018

 

$

1,736

 

 

$

569

 

 

$

2,305

 

Provision related to current period sales

 

 

6,418

 

 

 

1,071

 

 

 

7,489

 

Credit or payments made during the period

 

 

(4,698

)

 

 

(217

)

 

 

(4,915

)

Balance at June 30, 2019

 

$

3,456

 

 

$

1,423

 

 

$

4,879