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Note 5 - Inventories - Inventories (Details) - USD ($)
Mar. 31, 2022
Dec. 31, 2021
Raw materials $ 12,625,000 $ 13,545,000
Work in process 4,765,000 3,890,000
Finished goods 6,493,000 7,534,000
Inventory, Net, Total $ 23,883,000 $ 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.