Note 22 - Commitments and Contingencies (Details Textual) - USD ($) $ in Thousands	9 Months Ended		20 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Feb. 28, 2018
Payment for Blockchain Technology Based Applications Development Costs		$ 3,743	$ 3,710
Contract to Develop Blockchain Technology Based Applications [Member]
Application Development Contracts, Contract Amount	$ 4,920		$ 4,920	$ 4,500