Note 4 - Inventories (Tables)

12 Months Ended

Dec. 31, 2016

Notes Tables

Schedule of Inventory, Current [Table Text Block]

	December 31,
	2016		2015
	(Dollars in thousands)
Raw materials and purchased parts for assembly	$	5,429	$	8,819
Self-manufactured assembly parts and finished products		6,571		9,255
Total	$	12,000	$	18,074