Note 8 - Interest Expense and Other

3 Months Ended

12 Months Ended

Mar. 31, 2024

Dec. 31, 2023

Notes to Financial Statements

Other Nonoperating Income and Expense [Text Block]

8. INTEREST EXPENSE AND OTHER

Interest expense and other for the three months ended March 31, 2024 and 2023 consisted of the following (in thousands):

	Three months ended March 31,
	2024			2023
Amortization of premiums (accretion of discounts) on marketable securities, net	$	(271	)	$	(188	)
Expected credit losses		14			—
Other		(60	)		12
Interest expense and other	$	(317	)	$	(176	)

11. INTEREST EXPENSE AND OTHER

Interest expense and other for the years ended December 31, 2023 and 2022 consisted of the following (in thousands):

	Twelve months ended December 31,
	2023			2022
Amortization of premiums (accretion of discounts) on marketable securities, net	$	(474	)	$	778
Convertible note issuance costs		—			474
Loss on disposal of assets		111			—
Realized loss on instrument-specific credit risk		46			—
Expected credit losses		35			—
Realized losses on redemptions of marketable securities		—			77
Common Stock Purchase Agreement costs		—			29
Other		34			21
Interest expense and other	$	(248	)	$	1,379