Note 4 - Inventories

12 Months Ended

Dec. 31, 2021

Notes to Financial Statements

Inventory Disclosure [Text Block]

4. Inventories

Inventories consisted of the following:

	December 31,
	2021		2020
Raw materials	$	13,545,000	$	9,729,000
Work in process		3,890,000		2,003,000
Finished goods		7,534,000		5,017,000
Total inventory	$	24,969,000	$	16,749,000