Note 6 - Inventories

3 Months Ended

Mar. 31, 2018

Notes to Financial Statements

Inventory Disclosure [Text Block]

6. Inventories

As of

March 31, 2018

and

December 31, 2017,

inventories consisted of the following:

	March 31,		December 31,
	2018		2017
Raw materials	$	4,620,000	$	4,567,000
Work in process		1,239,000		1,058,000
Finished goods		4,776,000		4,624,000
	$	10,635,000	$	10,249,000