Note 4 - Inventories

12 Months Ended

Dec. 31, 2020

Notes to Financial Statements

Inventory Disclosure [Text Block]

4. Inventories

Inventories consisted of the following:

	December 31,
	2020		2019
Raw materials	$	9,729,000	$	4,284,000
Work in process		2,003,000		2,559,000
Finished goods		5,017,000		4,460,000
Total inventory	$	16,749,000	$	11,303,000