Note 11 - Prepayment for Blockchain and Other Software Applications Development (Details Textual) $ in Thousands, ¥ in Millions	6 Months Ended
	Jun. 30, 2018 USD ($)	Jun. 30, 2018 CNY (¥)	Jun. 30, 2017 USD ($)	Mar. 31, 2018 USD ($)	Mar. 31, 2018 CNY (¥)	Feb. 28, 2018 USD ($)
Payment for Application Development Contracts	$ 3,752
Contract to Develop Blockchain Technology Based Applications [Member]
Application Development Contracts, Contract Amount						$ 4,500
Payment for Application Development Contracts	3,380
Contract to Develop Social Network Based Applications [Member]
Application Development Contracts, Contract Amount				$ 450	¥ 3.0
Payment for Application Development Contracts	$ 360	¥ 2.4