Note 2 - Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Total revenue	$ 11,071	$ 10,420	$ 8,924	$ 16,729	$ 15,366	$ 14,641	$ 14,180	$ 15,096	$ 47,144	$ 59,283
Partner Solutions Product [Member]
Total revenue									42,257	50,628
Edge to Cloud Product [Member]
Total revenue									4,887	8,655
North America [Member]
Total revenue									40,339	50,110
Europe [Member]
Total revenue									2,055	2,023
Asia [Member]
Total revenue									4,750	7,150
Partner Solutions [Member]
Total revenue									42,257	50,628
Partner Solutions [Member] | Partner Solutions Product [Member]
Total revenue									42,257	50,628
Partner Solutions [Member] | Edge to Cloud Product [Member]
Total revenue
Partner Solutions [Member] | North America [Member]
Total revenue									36,141	42,443
Partner Solutions [Member] | Europe [Member]
Total revenue									1,460	1,273
Partner Solutions [Member] | Asia [Member]
Total revenue									4,656	6,912
Edge to Cloud [Member]
Total revenue									4,887	8,655
Edge to Cloud [Member] | Partner Solutions Product [Member]
Total revenue
Edge to Cloud [Member] | Edge to Cloud Product [Member]
Total revenue									4,887	8,655
Edge to Cloud [Member] | North America [Member]
Total revenue									4,198	7,667
Edge to Cloud [Member] | Europe [Member]
Total revenue									595	750
Edge to Cloud [Member] | Asia [Member]
Total revenue									$ 94	$ 238