Note 19 - Segment Reporting - Summary of Segment Reporting Information (Details) - USD ($) $ in Thousands	3 Months Ended				9 Months Ended
	Sep. 30, 2023		Sep. 30, 2022		Sep. 30, 2023		Sep. 30, 2022		Dec. 31, 2022
Revenues	$ 9,181		$ 7,216		$ 25,317		$ 21,813
Cost of revenues	9,185		7,267		25,746		21,811
Total operating expenses	1,602		1,780		3,825		6,097
Depreciation and amortization expense included in cost of revenues and total operating expenses	321				966
Operating loss	(1,606)		(1,831)		(4,254)		(6,095)
Change in fair value of warrant liabilities	13		(1,023)		185		759
Net income (loss)	(1,520)		(2,840)		(4,066)		(5,271)
Total assets	14,779				14,779				$ 19,658
Depreciation and amortization expense included in total operating expenses			552				1,660
Corporate, Non-Segment [Member]
Revenues	0
Cost of revenues	0
Total operating expenses	1,220	[1]	707	[2]	2,751	[2]	2,663	[2]
Depreciation and amortization expense included in cost of revenues and total operating expenses	21				62
Operating loss	(1,220)		(707)		(2,751)		(2,663)
Change in fair value of warrant liabilities	13		(1,023)		185		759
Net income (loss)	(1,123)		(1,707)		(2,543)		(1,800)
Total assets	36,525				36,525				39,136
Depreciation and amortization expense included in total operating expenses			21				65
Intersegment Eliminations [Member]
Revenues	0
Cost of revenues	0
Total operating expenses	0
Depreciation and amortization expense included in cost of revenues and total operating expenses	0
Operating loss	0		0		0		0
Change in fair value of warrant liabilities	0
Net income (loss)	0		0		0		0
Total assets	(32,413)				(32,413)				(31,701)
Depreciation and amortization expense included in total operating expenses			0				0
Internet Ad [Member] | Operating Segments [Member]
Revenues	9,156		7,216		25,242		21,813
Cost of revenues	8,975		7,267		25,116		21,811
Total operating expenses	380		628		1,063		1,517
Depreciation and amortization expense included in cost of revenues and total operating expenses	90				274
Operating loss	(199)		(679)		(937)		(1,515)
Net income (loss)	(211)		(688)		(961)		(1,555)
Total assets	9,474				9,474				10,385
Depreciation and amortization expense included in total operating expenses			91				270
Ecommerce O2O Ad and Marketing Services [Member] | Operating Segments [Member]
Revenues	0		0		0		0
Cost of revenues	0
Total operating expenses	2		80		11		817
Depreciation and amortization expense included in cost of revenues and total operating expenses	0
Operating loss	(2)		(80)		(11)		(817)
Net income (loss)	(1)		(80)		(6)		(816)
Total assets	142				142				156
Depreciation and amortization expense included in total operating expenses			75				225
Blockchain Technology [Member] | Operating Segments [Member]
Revenues			0		75		0
Cost of revenues			0		630		0
Total operating expenses	0						1,100
Depreciation and amortization expense included in cost of revenues and total operating expenses	210				630
Operating loss	(185)		(365)		(555)		(1,100)
Net income (loss)	(185)		(365)		(556)		(1,100)
Total assets	$ 1,051				$ 1,051				$ 1,682
Depreciation and amortization expense included in total operating expenses			$ 365				$ 1,100

[1] Including approximately US$0.02 million share-based compensation expenses.

[2] Including approximately US$0.10 million share-based compensation expenses.