Note 5 - Revenue - Disaggregated Revenue (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Revenue	$ 420,317	$ 659,205	$ 535,412
Less: Warrant contra revenue	0	(1,295)	0
Net Revenue	420,317	657,910	$ 535,412
Communications [Member]
Revenue	203,732	252,217
E-Commerce and Consumer [Member]
Revenue	56,797	106,907
Financial and Business Service [Member]
Revenue	40,325	50,837
Media [Member]
Revenue	39,529	92,846
Travel and Hospitality [Member]
Revenue	38,167	69,154
Health Care and Education [Member]
Revenue	19,254	45,578
Technology, IT and Related Service [Member]
Revenue	6,834	13,812
Other Sector [Member]
Revenue	$ 15,679	$ 27,854