Note 9— Inventory

Inventory consisted of the following (in thousands):



	September 30, 2016		December 31, 2015
Components and subassemblies	$	47,268	$	20,806
Work in process	36,812		43,071
Finished goods	159,528		49,778
Total	$	243,608	$	113,655

Finished goods inventory of $141.1 million and $49.5 million was located at customer sites pending acceptance as of September 30, 2016 and December 31, 2015, respectively. At September 30, 2016, two customers accounted for $126.6 million of finished goods inventory, and at December 31, 2015, three customers accounted for $41.7 million of finished goods inventory.

During the nine months ended September 30, 2016, the Company wrote off $0.2 million of inventory. During the nine months ended September 30, 2015, the Company wrote off $0.4 million of inventory.