Note 19 - Segment Reporting - Summary of Segment Reporting Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Revenues	$ 3,531	$ 6,316
Cost of revenues	3,459	6,630
Total operating expenses	994	998
Depreciation and amortization expense included in cost of revenues and total operating expenses	238	322
Operating loss	(922)	(1,312)
Operating loss	(922)	(1,312)
Change in fair value of warrant liabilities	0	101
Net loss	(850)	(1,143)
Total assets	11,404		$ 11,233
Operating Segments [Member] | Internet Ad [Member]
Revenues	3,531	6,291
Cost of revenues	3,459	6,420
Total operating expenses	370	349
Depreciation and amortization expense included in cost of revenues and total operating expenses	8	91
Operating loss	(298)	(478)
Operating loss	(298)	(478)
Change in fair value of warrant liabilities	0	0
Net loss	(308)	(482)
Total assets	7,994		7,966
Operating Segments [Member] | Ecommerce O2O Ad and Marketing Services [Member]
Revenues	0	0
Cost of revenues	0	0
Total operating expenses	3	4
Depreciation and amortization expense included in cost of revenues and total operating expenses	0	0
Operating loss	(3)	(4)
Operating loss	(3)	(4)
Change in fair value of warrant liabilities	0	0
Net loss	(3)	(1)
Total assets	144		144
Operating Segments [Member] | Blockchain Technology [Member]
Revenues	0	25
Cost of revenues	0	210
Total operating expenses	210	0
Depreciation and amortization expense included in cost of revenues and total operating expenses	210	210
Operating loss	(210)	(185)
Operating loss	(210)	(185)
Change in fair value of warrant liabilities	0	0
Net loss	(210)	(186)
Total assets	631		841
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member]
Revenues	0	0
Cost of revenues	0	0
Total operating expenses	411	645
Depreciation and amortization expense included in cost of revenues and total operating expenses	20	21
Operating loss	(411)	(645)
Operating loss	(411)	(645)
Change in fair value of warrant liabilities	0	101
Net loss	(329)	(474)
Total assets	35,227		34,867
Intersegment Eliminations [Member]
Revenues	0	0
Cost of revenues	0	0
Total operating expenses	0	0
Depreciation and amortization expense included in cost of revenues and total operating expenses	0	0
Operating loss	0	0
Operating loss	0	0
Change in fair value of warrant liabilities	0	$ 0
Net loss	0
Total assets	$ (32,592)		$ (32,585)