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Accounts Receivable
 12 Months Ended
Dec. 31, 2014
Accounts Receivable [Abstract]  
Accounts Receivable
4. Accounts Receivable

Our accounts receivable represent amounts due to Progenics from collaborators, royalties, research grants and the sales of research reagents, and as of December 31, 2014 and 2013, consisted of the following:

  
2014
  
2013
 
Collaborators
 
$
14
  
$
12
 
Royalties
  
40
   
2,862
 
Other
  
65
   
12
 
   
119
   
2,886
 
Less, allowance for doubtful accounts
  
(10
)
  
(7
)
Total
 
$
109
  
$
2,879