Note 19 - Segment Reporting - Summary of Segment Reporting Information (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Dec. 31, 2022
Dec. 31, 2021
Revenues $ 9,820 $ 6,945 $ 16,136 $ 14,597    
Cost of revenues 9,931 7,026 16,561 14,544    
Total operating expenses 1,225 2,632 2,223 4,317    
Depreciation and amortization expense included in cost of revenues and total operating expenses 323   645      
Operating loss (1,336) (2,713) (2,648) (4,264)    
Change in fair value of warrant liabilities 71 987 172 1,782 $ (185) $ (2,039)
Net loss (1,403) (1,714) (2,546) (2,431)    
Total assets 16,246   16,246   19,658  
Depreciation and amortization expense included in total operating expenses   554   1,108    
Corporate, Non-Segment [Member]            
Revenues 0          
Cost of revenues 0          
Total operating expenses 886 [1] 1,256 [2] 1,531 [2] 1,956 [2]    
Depreciation and amortization expense included in cost of revenues and total operating expenses 20   41      
Operating loss (886) (1,256) (1,531) (1,956)    
Change in fair value of warrant liabilities 71 987 172 1,782    
Net loss (946) (239) (1,420) (93)    
Total assets 37,483   37,483   39,136  
Depreciation and amortization expense included in total operating expenses   22   44    
Intersegment Eliminations [Member]            
Operating loss   0 0 0    
Net loss   0 0 0    
Total assets (32,397)   (32,397)   (31,701)  
Depreciation and amortization expense included in total operating expenses   0   0    
Internet Ad [Member] | Operating Segments [Member]            
Revenues 9,795 6,945 16,086 14,597    
Cost of revenues 9,721 7,026 16,141 14,544    
Total operating expenses 334 601 683 889    
Depreciation and amortization expense included in cost of revenues and total operating expenses 93   184      
Operating loss (260) (682) (738) (836)    
Net loss (268) (700) (750) (867)    
Total assets 9,755   9,755   10,385  
Depreciation and amortization expense included in total operating expenses   90   179    
Ecommerce O2O Ad and Marketing Services [Member] | Operating Segments [Member]            
Revenues 0 0 0 0    
Cost of revenues 0          
Total operating expenses 5 408 9 737    
Depreciation and amortization expense included in cost of revenues and total operating expenses 0          
Operating loss (5) (408) (9) (737)    
Net loss (4) (408) (5) (736)    
Total assets 143   143   156  
Depreciation and amortization expense included in total operating expenses   75   150    
Blockchain Technology [Member] | Operating Segments [Member]            
Revenues   0 50 0    
Cost of revenues   0 420 0    
Total operating expenses 0          
Depreciation and amortization expense included in cost of revenues and total operating expenses 210   420      
Operating loss (185) (367) (370) (735)    
Net loss (185) (367) (371) (735)    
Total assets $ 1,262   $ 1,262   $ 1,682  
Depreciation and amortization expense included in total operating expenses   $ 367   $ 735    
[1] Including approximately US$0.06 million share-based compensation expenses.
[2] Including approximately US$0.04 million share-based compensation expenses.