6. Inventory

Our inventory balance consists of the following (in thousands):


	March 31,		December 31,
	2019		2018
Raw materials	$	1,822	$	481
Work-in-process		4,097		3,488
Finished goods		5,086		6,436
		11,005		10,405
Inventories-current		7,129		6,967
Inventories-noncurrent	$	3,876	$	3,438

Inventories, stated at the lower of cost and net realizable value, consist of raw materials, work in process and finished goods. At March 31, 2019, $7.1 million of inventory was classified as current on the condensed consolidated balance sheet as we expect this inventory to be consumed for commercial use within the next twelve months. At March 31, 2019, $3.9 million of inventory was classified as noncurrent on the condensed consolidated balance sheets as we did not expect this inventory to be consumed for commercial use within the next twelve months. We obtain some inventory components from a limited number of suppliers due to technology, availability, price, quality or other considerations. The loss of a supplier, the deterioration of our relationship with a supplier, or any unilateral violation of the contractual terms under which we are supplied components by a supplier could adversely affect our total revenues and gross margins.