Inventory

The components of inventory consisted of the following:



	As of
(in thousands)	March 31, 2019		September 30, 2018
Raw materials	$	12,462	$	11,857
Work in-process	5,523		5,402
Finished goods	3,801		5,024
Inventory balance at end of period	$	21,786	$	22,283
Current portion	$	20,672	$	20,850
Non-Current portion	$	1,114	$	1,433

The non-current inventory balance of $1.1 million and $1.4 million as of March 31, 2019 and September 30, 2018, 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 six months ended March 31, 2019, we recorded a $0.1 million and $0.5 million reserve, respectively, on non-current inventory due to the decline in sales and future demand of the inventory.