Note 4 - Inventories

12 Months Ended

Dec. 31, 2019

Notes to Financial Statements

Inventory Disclosure [Text Block]

4 . Inventories

Inventories consisted of the following:

	December 31,
	2019		2018
Raw materials	$	4,284,000	$	4,732,000
Work in process		2,559,000		825,000
Finished goods		4,460,000		4,321,000
Total inventory	$	11,303,000	$	9,878,000