(5) Inventories

Inventories are valued at the lower of cost (using either the first-in, first-out (“FIFO”) or average cost methods) or market. The Company evaluates and adjusts as necessary its excess and obsolescence reserve at a minimum on a quarterly basis. Excess inventories are quantities of items that exceed anticipated sales or usage for a reasonable period. The Company has guidelines for calculating provisions for excess inventories based on the number of months of inventories on hand compared to anticipated sales or usage. Management uses its judgment to forecast sales or usage and to determine what constitutes a reasonable period. Inventory cost includes material, labor and overhead. Inventories consisted of the following:


		June 30,		December 31,
		2015		2014
Raw materials	$	46,407	$	41,767
Work-in-progress		10,335		8,779
Finished goods		25,375		20,707
Total inventories, net	$	82,117	$	71,253

Inventory valued using the FIFO method was $41,430 and $34,636 at June 30, 2015 and December 31, 2014, respectively. Inventory valued using the average cost method was $40,687 and $36,617 at June 30, 2015 and December 31, 2014, respectively.