Note 21 - Segment Reporting - Summary of Segment Reporting Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021		Dec. 31, 2020
Revenues	$ 47,328		$ 38,408
Cost of revenues	47,230		37,776
Total operating expenses	13,688		6,333
Depreciation and amortization expense included in total operating expenses			856
Loss from operations	(13,590)		(5,701)
Change in fair value of warrant liabilities	11,329		653
Net (loss)/income	(2,688)		(5,221)
Expenditure for long-term assets	1,494		2,003
Total assets	32,631		20,667
Corporate, Non-Segment [Member]
Revenues			1,245
Cost of revenues			576
Total operating expenses	9,734	[1]	3,531	[2]
Depreciation and amortization expense included in total operating expenses	18		4
Loss from operations	(9,734)		(2,862)
Change in fair value of warrant liabilities	11,329		653
Net (loss)/income	990		(2,144)
Expenditure for long-term assets	280
Total assets	44,328		27,766
Intersegment Eliminations [Member]
Total assets	(30,497)		(23,024)
Internet Ad [Member] | Operating Segments [Member]
Revenues	46,666		35,618
Cost of revenues	45,730		35,700
Total operating expenses	1,423		2,752
Depreciation and amortization expense included in total operating expenses	313		825
Loss from operations	(487)		(2,834)
Net (loss)/income	(309)		(3,071)
Expenditure for long-term assets	1,214
Total assets	12,150		8,310
Ecommerce O2O Ad and Marketing Services [Member] | Operating Segments [Member]
Revenues	662		1,545
Cost of revenues	1,500		1,500
Total operating expenses	2,529		45
Depreciation and amortization expense included in total operating expenses	300		25
Loss from operations	(3,367)
Net (loss)/income	(3,366)
Expenditure for long-term assets			1,500
Total assets	2,236		3,206
Corporate Segment [Member]
Revenues	47,328
Cost of revenues	47,230
Total operating expenses	13,688
Depreciation and amortization expense included in total operating expenses	632
Change in fair value of warrant liabilities	11,329
Blockchain Technology [Member] | Operating Segments [Member]
Total operating expenses	2		5
Depreciation and amortization expense included in total operating expenses	1		2
Loss from operations	(2)		(5)
Net (loss)/income	(3)		(6)
Expenditure for long-term assets			503
Total assets	$ 4,414		$ 4,409

[1] Including approximately US$7.03 million share-based compensation expenses.

[2] Including approximately US$2.15 million share-based compensation expenses.