v3.26.1
Note 1 - Nature of Operations, Basis of Presentation and Summary of Significant Accounting Policies - Key Financial Metrics (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Mar. 31, 2026
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Assets $ 38,159       $ 38,159   $ 42,732
Liabilities 17,903       17,903   17,887
Revenue from Contract with Customer, Including Assessed Tax 8,562   $ 7,075   11,690 $ 13,399  
Net Income (Loss) Attributable to Parent (3,080) $ (6,855) (4,278) $ (15,523) (9,935) (19,801)  
SERBIA              
Revenue from Contract with Customer, Including Assessed Tax 1,772   1,370   2,483 2,132  
SERBIA | Geographic Distribution, Foreign [Member]              
Assets 18,032       18,032   19,144
Liabilities 7,769       7,769   7,490
Revenue from Contract with Customer, Including Assessed Tax 3,984   3,300   5,556 4,826  
Net Income (Loss) Attributable to Parent (266)   691   (1,014) (6,000)  
UNITED STATES              
Revenue from Contract with Customer, Including Assessed Tax 4,578   3,822   6,133 8,621  
UNITED STATES | Geographic Distribution, Domestic [Member]              
Assets 19,985       19,985   23,479
Liabilities 9,919       9,919   10,376
Revenue from Contract with Customer, Including Assessed Tax 4,498   3,775   6,054 8,573  
Net Income (Loss) Attributable to Parent (2,827)   (4,969)   (8,927) (13,801)  
UNITED ARAB EMIRATES | Geographic Distribution, Foreign [Member]              
Assets 142       142   109
Liabilities 215       215   $ 21
Revenue from Contract with Customer, Including Assessed Tax 80   0   80 0  
Net Income (Loss) Attributable to Parent $ 13   $ 0   $ 6 $ 0