Note 4 - Inventories 1 (Tables)

3 Months Ended

12 Months Ended

Mar. 31, 2024

Dec. 31, 2023

Notes Tables

Schedule of Inventory, Current [Table Text Block]

	March 31, 2024		December 31, 2023
	(unaudited)
Raw materials	$	388	$	405
Work in-process		153		159
Finished goods		16		19
Total inventory, net	$	557	$	583

	As of December 31,
	2023		2022
Raw materials	$	405	$	2,022
Work in-process		159		2,484
Finished goods		19		47
Total inventory, net	$	583	$	4,553