Note 22 - Segment Reporting - Summary of Segment Reporting Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019		Dec. 31, 2018
Revenues	$ 58,080		$ 57,146
Cost of revenues	52,582		54,728
Total operating expenses	7,186		16,930
Depreciation and amortization expense included in total operating expenses	170		541
Operating loss	(1,688)		(14,512)
Change in fair value of warrant liabilities	499		1,669
Net loss	(1,270)		(14,127)
Expenditure for long-term assets	2,122		4,180
Total assets	18,551		16,968
Goodwill, Impairment Loss			5,211
Impairment of Intangible Assets (Excluding Goodwill), Total	3,330		3,330
Impairment on long-term investments			453
Corporate, Non-Segment [Member]
Revenues	1,202		356
Cost of revenues
Total operating expenses	1,943	[1]	2,400	[2]
Depreciation and amortization expense included in total operating expenses	18		71
Operating loss	(741)		(2,044)
Change in fair value of warrant liabilities	499		1,669
Net loss	(428)		(1,217)
Expenditure for long-term assets			3
Total assets	21,338		16,805
Goodwill, Impairment Loss
Impairment of Intangible Assets (Excluding Goodwill), Total
Impairment on long-term investments			453
Intersegment Eliminations [Member]
Revenues			(356)
Cost of revenues
Total operating expenses			(356)
Depreciation and amortization expense included in total operating expenses
Operating loss
Change in fair value of warrant liabilities
Net loss
Expenditure for long-term assets
Total assets	(20,228)		(16,546)
Goodwill, Impairment Loss
Impairment of Intangible Assets (Excluding Goodwill), Total
Impairment on long-term investments
Internet Ad [Member] | Operating Segments [Member]
Revenues	56,878		57,025
Cost of revenues	52,582		54,633
Total operating expenses	5,176		14,658
Depreciation and amortization expense included in total operating expenses	150		469
Operating loss	(880)		(12,266)
Change in fair value of warrant liabilities
Net loss	(778)		(12,708)
Expenditure for long-term assets	1,962		431
Total assets	13,332		12,756
Goodwill, Impairment Loss			5,211
Impairment of Intangible Assets (Excluding Goodwill), Total			3,330
Impairment on long-term investments
TV Ad [Member] | Operating Segments [Member]
Revenues			121
Cost of revenues			95
Total operating expenses	47		126
Depreciation and amortization expense included in total operating expenses			1
Operating loss	(47)		(100)
Change in fair value of warrant liabilities
Net loss	(44)		(100)
Expenditure for long-term assets
Total assets	224		207
Goodwill, Impairment Loss
Impairment of Intangible Assets (Excluding Goodwill), Total
Impairment on long-term investments
Blockchain Technology [Member] | Operating Segments [Member]
Revenues
Cost of revenues
Total operating expenses	20		102
Depreciation and amortization expense included in total operating expenses	2
Operating loss	(20)		(102)
Change in fair value of warrant liabilities
Net loss	(20)		(102)
Expenditure for long-term assets	160		3,746
Total assets	$ 3,885		3,746
Goodwill, Impairment Loss
Impairment of Intangible Assets (Excluding Goodwill), Total
Impairment on long-term investments

[1] Including approximately US$393,000 share-based compensation expenses.

[2] Including approximately US$233,000 share-based compensation expenses.