Note 3 - Inventories (Tables)

12 Months Ended

Dec. 31, 2017

Notes Tables

Schedule of Inventory, Current [Table Text Block]

	December 31,
	2017		2016
	(Dollars in thousands)
Raw materials and purchased parts for assembly	$	12,007	$	5,429
Self-manufactured assembly parts and finished products		7,544		6,571
Total	$	19,551	$	12,000