Note 5 - Inventories - Inventories (Details) - USD ($)	Sep. 30, 2022	Dec. 31, 2021
Raw materials	$ 12,817,000	$ 13,545,000
Work in process	3,292,000	3,890,000
Finished goods	9,015,000	7,534,000
Inventory, Net, Total	$ 25,124,000	$ 24,969,000	[1]

[1] The condensed consolidated balance sheet as of December 31, 2021 has been prepared using information from the audited consolidated balance sheet as of that date.