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Revenues and Trade Receivables, Net (Tables)
 12 Months Ended
Dec. 31, 2018
Revenues and Trade Receivables, Net [Roll Forward]  
Revenue
The Company’s revenue was comprised of the following:

  
Year Ended
December 31,
 
  
2018
  
2017
 
Manufacture and supply revenue
 
$
37,319
  
$
40,092
 
License and royalty revenue
  
24,699
   
23,133
 
Co-development and research fees
  
5,184
   
3,693
 
Proprietary product sales, net
  
228
   
—
 
Revenues
 
$
67,430
  
$
66,918
 
Disaggregation of Revenue
The following table provides disaggregated net revenue by geographic area:

 
Year Ended
December 31,
 
 
 

2018 
2017 
United States
 
$
64,565
  
$
63,710
 
Ex-United States
  
2,865
   
3,208
 
Revenues
 
$
67,430
  
$
66,918
 
Accounts Receivable, Net
Accounts receivable, net consist of the following:

  
December 31,
 
  
2018
  
2017
 
Accounts receivable
 
$
6,610
  
$
6,156
 
Other receivables
  
33
   
78
 
Less: allowance for bad debt
  
(58
)
  
(55
)
Less: sales-related allowances
  
(104
)
  
—
 
Trade and other receivables, net
 
$
6,481
  
$
6,179
 
Changes in Allowance for Bad Debts
The following table presents the changes in the allowance for bad debt:

  
December 31,
 
  
2018
  
2017
 
Allowance for doubtful accounts at beginning of year
 
$
55
  
$
108
 
Additions charged to bad debt expense
  
53
   
—
 
Write-downs charged against the allowance
  
(50
)
  
—
 
Recoveries of amounts previously reserved
  
—
   
(53
)
Allowance for doubtful accounts at end of year
 
$
58
  
$
55
 
Sales-related Allowances
The following table presents the changes in sales-related allowances:

  
December 31,
 
  
2018
  
2017
 
Balance at December 31, 2017
 
$
—
  
$
—
 
Provision related to sales in 2018
  
104
   
—
 
Credits and payments
  
—
   
—
 
Balance at December 31, 2018
 
$
104
  
$
—