Note 18 - Segment Reporting - Summary of Segment Reporting Information (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2025		Mar. 31, 2024	Dec. 31, 2024		Dec. 31, 2023
Revenues		$ 1,652		$ 3,531
Cost of revenues		1,492		3,459
Total operating expenses		739		994
Depreciation and amortization expense included in cost of revenues and total operating expenses		23		238
Operating income/(loss)		(579)		(922)
Expenditure for long-term assets		637
Change in fair value of warrant liabilities				0
Net loss		(530)		(850)
Total assets		9,541		11,404	$ 9,686		$ 11,233
Operating Segments [Member] | Internet Ad [Member]
Revenues		1,019		3,531
Cost of revenues		919		3,459
Total operating expenses		14		370
Depreciation and amortization expense included in cost of revenues and total operating expenses		7		8
Operating income/(loss)		86		(298)
Expenditure for long-term assets		0
Change in fair value of warrant liabilities				0
Net loss		83		(308)
Total assets		8,184		7,994	7,627		7,966
Operating Segments [Member] | IP Services [Member]
Revenues		18		0
Cost of revenues		13		0
Total operating expenses		0		0
Depreciation and amortization expense included in cost of revenues and total operating expenses		13		0
Operating income/(loss)		5		0
Expenditure for long-term assets		600
Change in fair value of warrant liabilities				0
Net loss		4		0
Total assets		712		0	0		0
Operating Segments [Member] | Blockchain Technology [Member]
Revenues		615		0
Cost of revenues		560		0
Total operating expenses		0		210
Depreciation and amortization expense included in cost of revenues and total operating expenses		0		210
Operating income/(loss)		55		(210)
Expenditure for long-term assets		0
Change in fair value of warrant liabilities				0
Net loss		55		(210)
Total assets		205		631	0		841
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member]
Revenues		0	[1]	0
Cost of revenues		0	[1]	0
Total operating expenses		725	[1]	414
Depreciation and amortization expense included in cost of revenues and total operating expenses		3	[1]	20
Operating income/(loss)		(725)	[1]	(414)
Expenditure for long-term assets	[1]	37
Change in fair value of warrant liabilities				0
Net loss		(672)	[1]	(332)
Total assets		33,793	[1]	35,371	34,405	[1]	35,011
Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment [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 income/(loss)		0		0
Expenditure for long-term assets		0
Change in fair value of warrant liabilities				0
Net loss		0		0
Total assets		$ (33,353)		$ (32,592)	$ (32,346)		$ (32,585)

[1] Since our Ecommerce O2O Ad and marketing services segment has been dormant and historical amounts were immaterial, the operations of this segment have been combined with the corporate segment for financial reporting purposes. Accordingly, the segment information for the three months ended March 31, 2024, has been reclassified to conform the presentation for the period ended March 31, 2025.