Note 13 - RevenuesByProductCategoryAndRegion: ScheduleOfOUSRevenuesByProductCategory (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Sales, net	$ 9,756	$ 10,390	$ 10,965	$ 10,887	$ 10,201	$ 10,125	$ 10,829	$ 10,259	$ 41,998	$ 41,414	$ 39,298
OUS
Sales, net									20,806	21,129	19,809
OUS | Obstetrics
Sales, net									698	732	658
OUS | Gynecology/Electrosurgery/Urology
Sales, net									15,022	14,759	12,851
OUS | Neonatal
Sales, net									2,252	2,105	1,965
OUS | Blood Pressure Monitoring and Accessories
Sales, net									$ 2,834	$ 3,533	$ 4,335