Note 4 - Cash and Cash Equivalents (Tables)

6 Months Ended

Jun. 30, 2025

Notes Tables

Schedule of Cash and Cash Equivalents [Table Text Block]

		*June 30,*				*December 31,*
(in thousands)		*2025*				*2024*
Cash and cash equivalents		$	2,682			$	6,869
Restricted cash			934				1,085
Total cash and cash equivalents, and restricted cash		$	3,616			$	7,954

Schedule of Cash and Cash Equivalents, and Restricted Cash by Country [Table Text Block]

		*June 30,*				*December 31,*
(in thousands)		*2025*				*2024*
Cash and cash equivalents:
United States		$	631			$	5,307
Malta			663				607
Finland			875				431
United Kingdom			157				57
Switzerland			106				81
Lithuania			99				313
Cyprus			76				14
Other			75				59
Restricted cash
Malta			353				566
Denmark			292				160
United Kingdom			244				164
Cyprus			29				188
Other			16				7
Total cash and cash equivalents, and restricted cash		$	3,616			$	7,954