Note 4 - Inventories 1

3 Months Ended

12 Months Ended

Mar. 31, 2024

Dec. 31, 2023

Notes to Financial Statements

Inventory Disclosure [Text Block]

4. INVENTORIES

Inventory, net of write-downs, as of March 31, 2024 and December 31, 2023 were as follows (in thousands):

	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

The Company also had $197 and $208 of non-current inventory (raw materials), net of write-downs, classified within other noncurrent assets on the condensed consolidated balance sheet as of March 31, 2024 and December 31, 2023, respectively.

The Company's current and non-current inventory as of March 31, 2024 and December 31, 2023 was written down by $5,025 and $5,062, respectively, in order to reduce inventory to the lower of cost or net realizable value.

4. INVENTORIES

Inventory, net of write-downs, as of December 31, 2023 and 2022 were as follows (in thousands):

	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

The Company also had $208 and $1,491 of non-current inventory (raw materials), net of write-downs, classified within Other noncurrent assets on the consolidated balance sheet as of December 31, 2023 and December 31, 2022, respectively.