Inventory

The components of inventory consisted of the following:



	As of		As of
(in thousands)	June 30, 2018		September 30, 2017
Raw materials	$	14,668	$	15,826
Work in-process	5,823		6,586
Finished goods	5,753		5,413
Inventory balance at end of period	$	26,244	$	27,825
Current portion	$	24,152	$	25,139
Non-Current portion	$	2,092	$	2,686

The non-current inventory balance of $2.1 million and $2.7 million as of June 30, 2018 and September 30, 2017, respectively, is comprised entirely of raw materials which we acquired as part of a last time purchase as a result of the vendor announcing it would cease manufacturing a part. During the three and nine months ended June 30, 2018, we recorded a $0.5 million reserve on non-current inventory due to the decline in sales and future demand of the inventory.