(4) Inventory

As the Company focuses on development of the TRACER 1000, inventory associated to its prior iterations of our technology was written-off during the second quarter of fiscal 2018. In addition, materials purchases are currently being expensed until inventory accounting is warranted by future product sales.

The following table summarizes the components of our inventory balances, net of allowance of $7 thousand and $116 thousand at March 31, 2018, and June 30, 2017, respectively:

(In thousands)	March 31, 2018		June 30, 2017
Raw materials	$	8	$	109
Work in process		1		57
Total inventory	$	9	$	166