Note 20 - Segment Reporting - Summary of Segment Reporting Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Revenues	$ 30,585	$ 26,235
Cost of revenues	31,021	26,429
Total operating expenses	5,576	10,925
Depreciation and amortization expenses included in cost of revenues and operating expenses	1,288	2,215
Impairment on intangible assets	1,231	2,123
Impairment on intangible assets included in operating expenses	1,231	2,123
Loss from operations	(6,012)	(11,119)
Other than Temporary Impairment Losses, Investments	433	596
Change in fair value of warrant liabilities	185	1,854
Net loss	(5,974)	(9,791)
Total assets-December 31, 2023	11,233	19,658
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member]
Revenues		0
Cost of revenues		0
Total operating expenses	3,177	3,713
Depreciation and amortization expenses included in cost of revenues and operating expenses	81	84
Impairment on intangible assets	0	0
Impairment on intangible assets included in operating expenses	0	0
Loss from operations	(3,177)	(3,713)
Other than Temporary Impairment Losses, Investments	433	520
Change in fair value of warrant liabilities	185	1,854
Net loss	(3,117)	(2,254)
Total assets-December 31, 2023	34,867	39,136
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
Other than Temporary Impairment Losses, Investments	0	0
Change in fair value of warrant liabilities	0	0
Net loss	0	0
Total assets-December 31, 2023	(32,585)	(31,701)
Internet Ad [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)
Other than Temporary Impairment Losses, Investments	0
Change in fair value of warrant liabilities	0
Net loss	(2,085)
Total assets-December 31, 2023	7,966
Internet Advertising and TV Advertising [Member] | Operating Segments [Member]
Revenues		25,810
Cost of revenues		26,093
Total operating expenses		3,072
Depreciation and amortization expenses included in cost of revenues and operating expenses		366
Impairment on intangible assets		0
Impairment on intangible assets included in operating expenses		0
Loss from operations		(3,355)
Other than Temporary Impairment Losses, Investments		76
Change in fair value of warrant liabilities		0
Net loss		(3,485)
Total assets-December 31, 2023		10,385
Ecommerce O2O Ad and Marketing Services [Member] | Operating Segments [Member]
Revenues	0	0
Cost of revenues	0	0
Total operating expenses	11	1,764
Depreciation and amortization expenses included in cost of revenues and operating expenses	0	300
Impairment on intangible assets	0	875
Impairment on intangible assets included in operating expenses	0	875
Loss from operations	(11)	(1,764)
Other than Temporary Impairment Losses, Investments	0	0
Change in fair value of warrant liabilities	0	0
Net loss	(6)	(1,764)
Total assets-December 31, 2023	144	156
Blockchain Technology [Member] | Operating Segments [Member]
Revenues	75	425
Cost of revenues	841	336
Total operating expenses	0	2,376
Depreciation and amortization expenses included in cost of revenues and operating expenses	841	1,465
Impairment on intangible assets	0	1,248
Impairment on intangible assets included in operating expenses	0	1,248
Loss from operations	(766)	(2,287)
Other than Temporary Impairment Losses, Investments	0	0
Change in fair value of warrant liabilities	0	0
Net loss	(766)	(2,288)
Total assets-December 31, 2023	$ 841	$ 1,682