Inventory

The components of inventory consisted of the following:



	As of		As of
(in thousands)	June 30, 2016		September 30, 2015
Raw materials	$	14,712	$	9,261
Work in-process	4,468		3,207
Finished goods	4,066		4,662
Inventory balance at end of period	$	23,246	$	17,130
Current portion	$	18,976	$	17,130
Non-Current portion	4,270		—
Inventory balance at end of period	$	23,246	$	17,130

The non-current inventory balance of $4.3 million as of June 30, 2016 is comprised entirely of raw materials which we acquired as part of a last time purchase as a result of the vendor announcing they would cease manufacturing a part.