Note 4 - Property and Equipment, Net - Schedule of Property and Equipment, Net (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Property and equipment, gross	$ 17,353	$ 13,784
Accumulated depreciation	7,443	5,519
Property and equipment, net	9,910	8,265
Computer Equipment [Member]
Property and equipment, gross	7,800	6,342
Office Furniture and Equipment [Member]
Property and equipment, gross	2,094	1,558
Leasehold Improvements [Member]
Property and equipment, gross	$ 7,459	$ 5,884