Note 5 - Inventories (Details Textual) - USD ($) $ in Thousands		Dec. 31, 2021	Dec. 31, 2020
Inventory, Raw Materials, Net of Reserves	[1]	$ 3,894	$ 1,051
Other Noncurrent Assets [Member]
Inventory, Raw Materials, Net of Reserves		$ 1,000

[1] $1.0 million of raw materials at December 31, 2021 are included within other non-current assets on the condensed consolidated balance sheets.