v3.26.1
Note 12 - Revenues - By Significant Geographic Area (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Revenue from Contract with Customer, Including Assessed Tax $ 8,562 $ 7,075 $ 11,690 $ 13,399
Customer Concentration Risk [Member]        
Revenue from Contract with Customer, Including Assessed Tax 8,562 7,075 11,690 13,399
UNITED STATES        
Revenue from Contract with Customer, Including Assessed Tax 4,578 3,822 6,133 8,621
SERBIA        
Revenue from Contract with Customer, Including Assessed Tax 1,772 1,370 2,483 2,132
ROMANIA        
Revenue from Contract with Customer, Including Assessed Tax 1,216 712 1,670 1,103
CROATIA        
Revenue from Contract with Customer, Including Assessed Tax 453 425 665 723
MONTENEGRO        
Revenue from Contract with Customer, Including Assessed Tax 397 286 592 360
BOSNIA AND HERZEGOVINA        
Revenue from Contract with Customer, Including Assessed Tax 0 329 0 329
Other [Member]        
Revenue from Contract with Customer, Including Assessed Tax $ 146 $ 131 $ 147 $ 131