Note 3 - Inventory and Other Deferred Costs (Tables)

12 Months Ended

Dec. 31, 2018

Notes Tables

Schedule of Inventory, Current [Table Text Block]

	December 31, 2018		December 31, 2017
	(in thousands)
Raw materials	$	4,085	$	3,200
Work-in-process		5,095		3,745
Finished products		16,391		12,278
Other deferred costs		1,817		1,823
Total inventory and other deferred costs	$	27,388	$	21,046