Note 2 - Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Total revenue	$ 8,924	$ 14,180	$ 25,653	$ 29,276
North America [Member]
Total revenue	7,754	12,039	21,530	24,906
Europe [Member]
Total revenue	395	698	1,034	1,221
Asia [Member]
Total revenue	775	1,443	3,089	3,149
Partner Solutions [Member]
Total revenue	8,110	11,684	24,015	24,785
Partner Solutions [Member] | North America [Member]
Total revenue	7,114	9,785	20,285	20,836
Partner Solutions [Member] | Europe [Member]
Total revenue	305	520	731	922
Partner Solutions [Member] | Asia [Member]
Total revenue	691	1,379	2,999	3,027
Edge to Cloud [Member]
Total revenue	814	2,496	1,638	4,491
Edge to Cloud [Member] | North America [Member]
Total revenue	640	2,254	1,245	4,069
Edge to Cloud [Member] | Europe [Member]
Total revenue	90	178	303	300
Edge to Cloud [Member] | Asia [Member]
Total revenue	$ 84	$ 64	$ 90	$ 122