Inventory

The components of inventory consisted of the following:



	As of September 30,
(in thousands)	2018		2017
Raw materials	$	11,857	$	15,826
Work in-process	5,402		6,586
Finished goods	5,024		5,413
Inventory balance at end of period	$	22,283	$	27,825
Current portion	$	20,850	$	25,139
Non-Current portion	$	1,433	$	2,686

The non-current inventory balance of $1.4 million and $2.7 million as of September 30, 2018 and 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 fiscal year ended September 30, 2018, we recorded a $1.0 million reserve on non-current inventory due to the decline in sales and future demand of the inventory.