Inventory

The components of biopolymer inventories of the Company's continuing operations are as follows:



	Year Ended December 31,
	2015		2014
Raw materials	$	51	$	2
Finished goods	328		584
Total inventory	$	379	$	586

Included within finished goods at December 31, 2015 and 2014, are $51 and $9, respectively, of inventory that the Company has sold and shipped to customers for which the Company has not yet recognized revenue under its product revenue recognition policy. On a quarterly basis, the Company uses consistent methodologies to evaluate inventory for net realizable value, reducing the value of inventory for excess and obsolete inventory based upon certain assumptions made about future customer demand, quality and possible alternative uses. During the years ended December 31, 2015, 2014 and 2013, the Company recorded impairment charges to cost of product revenue of $209, $873, and $746, respectively, within continuing operations, for raw material and finished goods inventory that it determined was unlikely to be sold. The Company also recorded an impairment charge of $888 during its fiscal year ended December 31, 2014 related to the discontinuation of its German operations.