Note 3 - Inventories (Tables)

3 Months Ended

Mar. 31, 2015

Inventory Disclosure [Abstract]

Schedule of Inventory, Current [Table Text Block]

	March 31,		December 31,
	2015		2014
	(Dollars in thousands)
Raw materials and purchased parts for assembly	$	6,127	$	4,840
Self-manufactured assembly parts and finished products		11,159		12,090
Total	$	17,286	$	16,930