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Note 5 - Inventories (Details Textual) - USD ($)
$ in Thousands
Jun. 30, 2023
Dec. 31, 2022
Inventory, Raw Materials, Net of Reserves [1] $ 5,363 $ 4,676
Other Noncurrent Assets [Member]    
Inventory, Raw Materials, Net of Reserves $ 2,400 $ 2,400
[1] $1.5 million and $1.0 million of raw materials are included within other non-current assets on the condensed consolidated balance sheets at June 30, 2022 and December 31, 2021, respectively.