Note 2 - Inventories (Tables)

12 Months Ended

Dec. 31, 2014

Inventory Disclosure [Abstract]

Schedule of Inventory, Current [Table Text Block]

	December 31,
	2014		2013
	(Dollars in thousands)
Raw materials and purchased parts for assembly	$	4,840	$	6,326
Self-manufactured assembly parts and finished products		12,090		15,963
Total	$	16,930	$	22,289