Note 19 - Segment Reporting - Summary of Segment Reporting Information (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended				12 Months Ended
	Jun. 30, 2023		Jun. 30, 2022		Jun. 30, 2023		Jun. 30, 2022		Dec. 31, 2022	Dec. 31, 2021
Revenues	$ 9,820		$ 6,945		$ 16,136		$ 14,597
Cost of revenues	9,931		7,026		16,561		14,544
Total operating expenses	1,225		2,632		2,223		4,317
Depreciation and amortization expense included in cost of revenues and total operating expenses	323				645
Operating loss	(1,336)		(2,713)		(2,648)		(4,264)
Change in fair value of warrant liabilities	71		987		172		1,782		$ (185)	$ (2,039)
Net loss	(1,403)		(1,714)		(2,546)		(2,431)
Total assets	16,246				16,246				19,658
Depreciation and amortization expense included in total operating expenses			554				1,108
Corporate, Non-Segment [Member]
Revenues	0
Cost of revenues	0
Total operating expenses	886	[1]	1,256	[2]	1,531	[2]	1,956	[2]
Depreciation and amortization expense included in cost of revenues and total operating expenses	20				41
Operating loss	(886)		(1,256)		(1,531)		(1,956)
Change in fair value of warrant liabilities	71		987		172		1,782
Net loss	(946)		(239)		(1,420)		(93)
Total assets	37,483				37,483				39,136
Depreciation and amortization expense included in total operating expenses			22				44
Intersegment Eliminations [Member]
Operating loss			0		0		0
Net loss			0		0		0
Total assets	(32,397)				(32,397)				(31,701)
Depreciation and amortization expense included in total operating expenses			0				0
Internet Ad [Member] | Operating Segments [Member]
Revenues	9,795		6,945		16,086		14,597
Cost of revenues	9,721		7,026		16,141		14,544
Total operating expenses	334		601		683		889
Depreciation and amortization expense included in cost of revenues and total operating expenses	93				184
Operating loss	(260)		(682)		(738)		(836)
Net loss	(268)		(700)		(750)		(867)
Total assets	9,755				9,755				10,385
Depreciation and amortization expense included in total operating expenses			90				179
Ecommerce O2O Ad and Marketing Services [Member] | Operating Segments [Member]
Revenues	0		0		0		0
Cost of revenues	0
Total operating expenses	5		408		9		737
Depreciation and amortization expense included in cost of revenues and total operating expenses	0
Operating loss	(5)		(408)		(9)		(737)
Net loss	(4)		(408)		(5)		(736)
Total assets	143				143				156
Depreciation and amortization expense included in total operating expenses			75				150
Blockchain Technology [Member] | Operating Segments [Member]
Revenues			0		50		0
Cost of revenues			0		420		0
Total operating expenses	0
Depreciation and amortization expense included in cost of revenues and total operating expenses	210				420
Operating loss	(185)		(367)		(370)		(735)
Net loss	(185)		(367)		(371)		(735)
Total assets	$ 1,262				$ 1,262				$ 1,682
Depreciation and amortization expense included in total operating expenses			$ 367				$ 735

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

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