Inventory

Inventories are stated at the lower of cost and net realizable value. Cost is determined using the weighted average cost of raw materials which approximates the FIFO method and includes allocations of manufacturing labor and overhead. Included in finished goods at December 31, 2018 and December 31, 2017 was $1.4 million and $1.4 million, respectively, of trial and evaluation hardware units. Provisions are made to reduce excess, obsolete or slow-moving inventories to their net realizable value. Inventories consisted of the following at December 31 (in thousands):



	2018		2017
Raw materials	$	19,670	$	20,119
Finished goods	14,093		25,346
Total inventory	$	33,763	$	45,465