Note 2 - Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended		9 Months Ended	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Sep. 30, 2019	Jun. 30, 2021	Jun. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Total revenue	$ 10,671	$ 8,924	$ 14,718	$ 20,643	$ 25,653	$ 43,994	$ 59,360
North America [Member]
Total revenue	8,221	7,754		16,809	21,530
Europe [Member]
Total revenue	138	395		359	1,034
Asia [Member]
Total revenue	2,312	775		3,475	3,089
Partner Solutions [Member]
Total revenue	9,960	8,110		18,755	24,015
Partner Solutions [Member] | North America [Member]
Total revenue	7,555	7,114		15,078	20,285
Partner Solutions [Member] | Europe [Member]
Total revenue	93	305		202	731
Partner Solutions [Member] | Asia [Member]
Total revenue	2,312	691		3,475	2,999
Edge to Cloud [Member]
Total revenue	711	814	$ 2,162	1,888	1,638	$ 6,653	$ 8,732
Edge to Cloud [Member] | North America [Member]
Total revenue	666	640		1,731	1,245
Edge to Cloud [Member] | Europe [Member]
Total revenue	45	90		157	303
Edge to Cloud [Member] | Asia [Member]
Total revenue	$ 0	$ 84		$ 0	$ 90