Note 6 - Property and Equipment, Net - Property and Equipment, Net (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Property, Plant and Equipment, Gross, Ending Balance	$ 10,133	$ 8,945
Less accumulated depreciation and amortization	(6,881)	(6,282)
Property, Plant and Equipment, Net, Ending Balance	3,252	2,663
Computer Equipment [Member]
Property, Plant and Equipment, Gross, Ending Balance	5,020	4,030
Leasehold Improvements [Member]
Property, Plant and Equipment, Gross, Ending Balance	2,700	2,633
Furniture and Fixtures [Member]
Property, Plant and Equipment, Gross, Ending Balance	880	887
Building [Member]
Property, Plant and Equipment, Gross, Ending Balance	774	766
Office Equipment [Member]
Property, Plant and Equipment, Gross, Ending Balance	385	384
Software and Software Development Costs [Member]
Property, Plant and Equipment, Gross, Ending Balance	$ 374	$ 245

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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