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Inventory
12 Months Ended
Dec. 31, 2017
Inventory Disclosure [Abstract]  
Inventory
Inventory

Due to the deferral of revenue under the BARDA Contract (see Note 3 for additional information), amounts that would be otherwise recorded as cost of goods sold for delivered courses are recorded as deferred costs on the consolidated balance sheets. The value of inventory represents the costs incurred to manufacture TPOXX®.

Inventory consisted of the following:
 
As of
 
December 31, 2017
 
December 31, 2016
Work in-process
$
2,025,445

 
$
18,916,084

Finished goods
957,804

 
7,293,880

Inventory
$
2,983,249

 
$
26,209,964



For the years ended December 31, 2017 and 2016, research and development expenses include net inventory-related losses of approximately $536,000 and $0, respectively. The $536,000 loss for the year ended December 31, 2017 relates to a $686,000 inventory write-down, partially offset by credits received from contract manufacturing organizations (“CMO”) in connection with the inventory write-down.