Note 2 - Variable Interest Entities - Consolidated VIEs' Financial Performance (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Revenues	$ 57,146	$ 46,633
Cost of revenues	54,728	42,020
Total operating expenses (including impairment on intangible assets and goodwill)	16,930	14,011
Net loss	(14,127)	(10,011)
VIEs [Member]
Revenues	57,133	46,576
Cost of revenues	54,728	42,019
Total operating expenses (including impairment on intangible assets and goodwill)	12,826	9,853
Net loss	$ 10,862	$ 5,878