Note 5 - Inventories (Details Textual) - USD ($) $ in Thousands		Jun. 30, 2022	Dec. 31, 2021
Inventory, Raw Materials, Net of Reserves	[1]	$ 4,543	$ 3,894
Other Noncurrent Assets [Member]
Inventory, Raw Materials, Net of Reserves		$ 1,500	$ 1,000

[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.