Note 19 - Segment Reporting - Summary of Segment Reporting Information (Details) - USD ($) $ in Thousands		3 Months Ended			6 Months Ended		9 Months Ended
		Sep. 30, 2025	Sep. 30, 2024		Jun. 30, 2025	Jun. 30, 2024	Sep. 30, 2025	Sep. 30, 2024		Dec. 31, 2024	Dec. 31, 2023
Revenues		$ 1,717	$ 3,239				$ 3,917	$ 13,190
Revenues		1,717	3,239				3,917	13,190
Cost of revenues		1,619	3,184				3,612	12,735
Cost of revenues		1,619	3,184				3,612	12,735
Total operating expenses		251	2,047				1,719	3,670
Total operating expenses		251	2,047				1,719	3,670
Depreciation and amortization expense included in cost of revenues and total operating expenses		72	237				163	713
Depreciation and amortization expense included in cost of revenues and total operating expenses		72	237				163	713
Operating income/(loss)		(153)	(1,992)				(1,414)	(3,215)
Expenditure for long-term assets							665
Net loss		(108)	(1,905)		$ (1,167)	$ (1,082)	(1,275)	(2,987)
Impairment on long-term investment		0	0				0	(2)
Gain on disposal of subsidiaries		0	23				0	23
Total assets		9,650	11,007				9,650	11,007		$ 9,686	$ 11,233
Operating Segments [Member] | Internet Ad [Member]
Revenues		1,635	3,239				3,123	12,440
Revenues		1,635	3,239				3,123	12,440
Cost of revenues		1,559	2,973				2,921	12,104
Cost of revenues		1,559	2,973				2,921	12,104
Total operating expenses		(34)	43				269	926
Total operating expenses		(34)	43				269	926
Depreciation and amortization expense included in cost of revenues and total operating expenses		4	7				16	23
Depreciation and amortization expense included in cost of revenues and total operating expenses		4	7				16	23
Operating income/(loss)		109	222				(67)	(591)
Expenditure for long-term assets							0
Net loss		110	241				(70)	(587)
Impairment on long-term investment								0
Gain on disposal of subsidiaries			22					22
Total assets		7,857	8,331				7,857	8,331		7,627	7,966
Operating Segments [Member] | IP Services [Member]
Revenues		82					179
Revenues		82					179
Cost of revenues		60					131
Cost of revenues		60					131
Total operating expenses		0					0
Total operating expenses		0					0
Depreciation and amortization expense included in cost of revenues and total operating expenses		60					131
Depreciation and amortization expense included in cost of revenues and total operating expenses		60					131
Operating income/(loss)		22					48
Expenditure for long-term assets							600
Net loss		22					48
Total assets		576					576			0
Operating Segments [Member] | Ecommerce O2O Ad and Marketing Services [Member]
Revenues			0					0
Revenues			0					0
Cost of revenues			0					0
Cost of revenues			0					0
Total operating expenses			0					0
Total operating expenses			0					0
Depreciation and amortization expense included in cost of revenues and 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
Net loss			0					0
Impairment on long-term investment								0
Gain on disposal of subsidiaries			0					0
Total assets			0					0			0
Operating Segments [Member] | Blockchain Technology [Member]
Revenues		0	0				615	750
Revenues		0	0				615	750
Cost of revenues		0	211				560	631
Cost of revenues		0	211				560	631
Total operating expenses		0	0				0	0
Total operating expenses		0	0				0	0
Depreciation and amortization expense included in cost of revenues and total operating expenses		0	211				0	631
Depreciation and amortization expense included in cost of revenues and total operating expenses		0	211				0	631
Operating income/(loss)		(1)	(211)				55	119
Expenditure for long-term assets							0
Net loss		(1)	(211)				55	119
Impairment on long-term investment								0
Gain on disposal of subsidiaries			0					0
Total assets		55	210				55	210		0	841
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member]
Revenues		0	0	[1]			0	0	[1]
Revenues		0	0	[1]			0	0	[1]
Cost of revenues		0	0	[1]			0	0	[1]
Cost of revenues		0	0	[1]			0	0	[1]
Total operating expenses		285	2,004	[1]			1,450	2,744	[1]
Total operating expenses		285	2,004	[1]			1,450	2,744	[1]
Depreciation and amortization expense included in cost of revenues and total operating expenses		8	19	[1]			16	59	[1]
Depreciation and amortization expense included in cost of revenues and total operating expenses		8	19	[1]			16	59	[1]
Operating income/(loss)		(283)	(2,003)	[1]			(1,450)	(2,743)	[1]
Expenditure for long-term assets							65
Net loss		(239)	(1,935)	[1]			(1,308)	(2,519)	[1]
Impairment on long-term investment	[1]							(2)
Gain on disposal of subsidiaries	[1]		1					1
Total assets		34,210	34,359	[1]			34,210	34,359	[1]	34,405	35,011	[1]
Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment [Member]
Revenues		0					0
Revenues		0					0
Cost of revenues		0					0
Cost of revenues		0					0
Total operating expenses		0					0
Total operating expenses		0					0
Depreciation and amortization expense included in cost of revenues and 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
Net loss		0					0
Total assets		$ (33,048)					$ (33,048)			$ (32,346)
Intersegment Eliminations [Member]
Revenues			0					0
Revenues			0					0
Cost of revenues			0					0
Cost of revenues			0					0
Total operating expenses			0					0
Total operating expenses			0					0
Depreciation and amortization expense included in cost of revenues and 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
Net loss			0					0
Impairment on long-term investment								0
Gain on disposal of subsidiaries			0					0
Total assets			$ (31,893)					$ (31,893)			$ (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 nine and three months ended September 30, 2024, has been reclassified to conform to the presentation for the nine and three months ended September 30, 2025.