Note 19 - Segment Reporting - Summary of Segment Reporting Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023		Mar. 31, 2022		Dec. 31, 2022
Revenues	$ 6,316		$ 7,652
Cost of revenues	6,630		7,518
Total operating expenses	998		1,685
Depreciation and amortization expense included in cost of revenues and total operating expenses	322		554
Operating loss	(1,312)		(1,551)
Change in fair value of warrant liabilities	101		795
Net loss	(1,143)		(717)
Total assets	17,831				$ 19,658
Corporate, Non-Segment [Member]
Revenues			0
Cost of revenues			0
Total operating expenses	645	[1]	700	[2]
Depreciation and amortization expense included in cost of revenues and total operating expenses	21		22
Operating loss	(645)		(700)
Change in fair value of warrant liabilities	101		795
Net loss	(474)		146
Total assets	38,372				39,136
Intersegment Eliminations [Member]
Operating loss	0		0
Net loss
Total assets	(32,227)				(31,701)
Internet Ad [Member] | Operating Segments [Member]
Revenues	6,291		7,652
Cost of revenues	6,420		7,518
Total operating expenses	349		288
Depreciation and amortization expense included in cost of revenues and total operating expenses	91		89
Operating loss	(478)		(154)
Net loss	(482)		(167)
Total assets	10,060				10,385
Ecommerce O2O Ad and Marketing Services [Member] | Operating Segments [Member]
Revenues	0		0
Cost of revenues			0
Total operating expenses	4		329
Depreciation and amortization expense included in cost of revenues and total operating expenses			75
Operating loss	(4)		(329)
Net loss	(1)		(328)
Total assets	154				156
Blockchain Technology [Member] | Operating Segments [Member]
Revenues	25
Cost of revenues	210
Total operating expenses			368
Depreciation and amortization expense included in cost of revenues and total operating expenses	210		368
Operating loss	(185)		(368)
Net loss	(186)		$ (368)
Total assets	1,472				$ 1,682
Corporate Segment [Member]
Revenues	6,316
Cost of revenues	6,630
Total operating expenses	998
Change in fair value of warrant liabilities	$ 101

[1] Including approximately US$0.04 million share-based compensation expenses.

[2] Including approximately US$0.06 million share-based compensation expenses.