Note 6 - Inventories (Tables)

3 Months Ended

Mar. 31, 2016

Notes Tables

Schedule of Inventory, Current [Table Text Block]

	March 31,		December 31,
	2016		2015
Raw materials	$	5,664,000	$	6,456,000
Work in process		3,610,000		4,143,000
Finished goods		5,481,000		5,799,000
	$	14,755,000	$	16,398,000