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Revenue Recognition (Tables)
 3 Months Ended
Mar. 31, 2018
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 three months ended March 31, 2018 (in thousands):

 

 

Chargebacks, discounts and other fees

 

 

Returns

 

 

Total

 

Balance at December 31, 2017

 

$

-

 

 

$

-

 

 

$

-

 

Provision related to current period sales

 

 

73

 

 

 

13

 

 

 

86

 

Credit or payments made during the period

 

 

(1

)

 

 

-

 

 

 

(1

)

Balance at March 31, 2018

 

$

72

 

 

$

13

 

 

$

85