Note 21 - Segment Reporting - Summary of Segment Reporting Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Revenues	$ 15,439	$ 30,585
Cost of revenues	14,993	31,021
Total operating expenses	4,203	5,576
Depreciation and amortization expenses included in cost of revenues and operating expenses	937	1,288
Impairment on intangible assets	0	1,231
Impairment on intangible assets included in operating expenses	0	1,231
Loss from operations	(3,757)	(6,012)
Impairment on long-term investments	(2)	(433)
Gain on disposal of subsidiaries	23	10
Change in fair value of warrant liabilities	0	185
Net loss	(3,769)	(5,974)
Total assets-December 31, 2023	9,686	11,233
Intersegment Eliminations [Member]
Revenues	0	0
Cost of revenues	0	0
Total operating expenses	0	0
Depreciation and amortization expenses included in cost of revenues and operating expenses	0	0
Impairment on intangible assets	0	0
Impairment on intangible assets included in operating expenses	0	0
Loss from operations	0	0
Impairment on long-term investments	0	0
Gain on disposal of subsidiaries	0
Change in fair value of warrant liabilities		0
Net loss	0	0
Total assets-December 31, 2023	(32,346)	(32,585)
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member]
Total operating expenses	2,462	3,177
Depreciation and amortization expenses included in cost of revenues and operating expenses	67	81
Impairment on intangible assets	0	0
Impairment on intangible assets included in operating expenses	0	0
Loss from operations	(2,462)	(3,177)
Impairment on long-term investments	(2)	(433)
Gain on disposal of subsidiaries	1
Change in fair value of warrant liabilities		185
Net loss	(2,175)	(3,117)
Total assets-December 31, 2023	34,260	34,867
Internet Ad [Member] | Operating Segments [Member]
Revenues	14,689
Cost of revenues	14,152
Total operating expenses	1,727
Depreciation and amortization expenses included in cost of revenues and operating expenses	29
Impairment on intangible assets	0
Impairment on intangible assets included in operating expenses	0
Loss from operations	(1,190)
Impairment on long-term investments	0
Gain on disposal of subsidiaries	22
Net loss	(1,491)
Total assets-December 31, 2023	7,627
Internet Advertising and TV Advertising [Member] | Operating Segments [Member]
Revenues		30,510
Cost of revenues		30,180
Total operating expenses		2,388
Depreciation and amortization expenses included in cost of revenues and operating expenses		366
Impairment on intangible assets		1,231
Impairment on intangible assets included in operating expenses		1,231
Loss from operations		(2,058)
Impairment on long-term investments		0
Change in fair value of warrant liabilities		0
Net loss		(2,085)
Total assets-December 31, 2023		7,966
Ecommerce O2O Ad and Marketing Services [Member] | Operating Segments [Member]
Revenues	0	0
Cost of revenues	0	0
Total operating expenses	14	11
Depreciation and amortization expenses included in cost of revenues and operating expenses	0	0
Impairment on intangible assets	0	0
Impairment on intangible assets included in operating expenses	0	0
Loss from operations	(14)	(11)
Impairment on long-term investments	0	0
Gain on disposal of subsidiaries	0
Change in fair value of warrant liabilities		0
Net loss	(12)	(6)
Total assets-December 31, 2023	145	144
Blockchain Technology [Member] | Operating Segments [Member]
Revenues	750	75
Cost of revenues	841	841
Total operating expenses	0	0
Depreciation and amortization expenses included in cost of revenues and operating expenses	841	841
Impairment on intangible assets	0	0
Impairment on intangible assets included in operating expenses	0	0
Loss from operations	(91)	(766)
Impairment on long-term investments	0	0
Gain on disposal of subsidiaries	0
Change in fair value of warrant liabilities		0
Net loss	(91)	(766)
Total assets-December 31, 2023	$ 0	$ 841