Note 1 - Organization and Summary of Significant Accounting Policies - Impact of Topic 606 (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Total net revenue		$ 20,100	$ 9,179
Total cost of revenue		8,524	4,471
Net Income (loss)		6,244	374
Service [Member]
Total net revenue		18,751	9,089
Total cost of revenue		8,388	4,384
Product [Member]
Total net revenue		1,349	90
Total cost of revenue		$ 136	$ 87
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Accounting Standards Update 2014-09 [Member]
Total net revenue	$ (123)
Total cost of revenue	(24)
Net Income (loss)	(99)
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Accounting Standards Update 2014-09 [Member] | Service [Member]
Total net revenue	636
Total cost of revenue	209
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Accounting Standards Update 2014-09 [Member] | Product [Member]
Total net revenue	(759)
Total cost of revenue	$ (233)