Inventory (Tables)

3 Months Ended

Mar. 31, 2018

Inventory [Line Items]

Schedule of Inventory, Current [Table Text Block]

Inventories consisted of the following (in thousands):

	March 31,		December 31,
	2018		2017
Raw materials	$	3,037	$	1,717
Work in process	2,031		1,119
Finished goods	8,944		6,311
Total inventory	$	14,012	$	9,147