Note 11 - Revenues By Product Category And Region: Schedule Of Global Revenues By Product Category (Details) - USD ($) $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	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, 2019	Dec. 31, 2018	Dec. 31, 2017
Sales, net (notes 1, 3, 9 and 11)	$ 11,831	$ 12,494	$ 11,846	$ 10,732	$ 9,756	$ 10,390	$ 10,965	$ 10,887	$ 10,201	$ 10,125	$ 10,829	$ 10,259	$ 46,904	$ 41,998	$ 41,414
Global
Sales, net (notes 1, 3, 9 and 11)													46,904	41,998	41,414
Global | Obstetrics
Sales, net (notes 1, 3, 9 and 11)													5,000	4,447	4,499
Global | Gynecology/Electrosurgery/Urology
Sales, net (notes 1, 3, 9 and 11)													25,354	23,167	23,175
Global | Neonatal
Sales, net (notes 1, 3, 9 and 11)													6,066	6,436	6,154
Global | Blood Pressure Monitoring and Accessories
Sales, net (notes 1, 3, 9 and 11)													$ 10,484	$ 7,948	$ 7,586