4. Inventories

	December 31,		December 31,
	2012		2013
Raw materials	$	1,299	$	3,832
Work in progress	971		448
Finished goods	8,260		10,049
Inventories	$	10,530	$	14,329

For the year ended December 31, 2013, the Company charged $2,217 (2012- $3,140, 2011- $1,205) of excessive fixed production overhead to cost of sales as such costs were incurred.

For the years ended December 31, 2013, the cost of sales includes $1,399 (2012- $3,479, 2011 - $4,034) of inventory provision for products that are likely to be expired before being sold.