Note 4 - Inventories (Tables)

12 Months Ended

Dec. 31, 2012

Schedule of Inventory, Current [Table Text Block]

	December 31,
	2012		2011
Raw materials	$	8,212,000	$	8,007,000
Work in process		3,056,000		3,048,000
Finished goods		5,896,000		4,511,000
	$	17,164,000	$	15,566,000