Note 2 - Significant Accounting Policies - Inventory Balance (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Raw materials	$ 4,569	$ 1,431
Work-in-process (materials, labor and overhead)	1,385	1,258
Finished goods (materials, labor and overhead)	1,155	765
Total Inventories	$ 7,109	$ 3,454

Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of merchandise or goods held by the company that are readily available for sale.

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