Note 4 - Inventories (Tables)

12 Months Ended

Dec. 31, 2015

Notes Tables

Schedule of Inventory, Current [Table Text Block]

	December 31,
	2015		2014
Raw materials	$	6,456,000	$	6,436,000
Work in process		4,143,000		4,834,000
Finished goods		5,799,000		5,274,000
	$	16,398,000	$	16,544,000