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, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	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, 2020	Dec. 31, 2019	Dec. 31, 2018
Sales, net (notes 1, 3, 9 and 11)	$ 12,010	$ 10,479	$ 8,787	$ 10,902	$ 11,831	$ 12,494	$ 11,846	$ 10,732	$ 9,756	$ 10,390	$ 10,965	$ 10,887	$ 42,178	$ 46,904	$ 41,998
Global
Sales, net (notes 1, 3, 9 and 11)													42,178	46,904	41,998
Global | Obstetrics
Sales, net (notes 1, 3, 9 and 11)													4,523	5,000	4,447
Global | Gynecology/Electrosurgery/Urology
Sales, net (notes 1, 3, 9 and 11)													20,552	25,354	23,167
Global | Neonatal
Sales, net (notes 1, 3, 9 and 11)													5,870	6,066	6,436
Global | Blood Pressure Monitoring and Accessories
Sales, net (notes 1, 3, 9 and 11)													$ 11,233	$ 10,484	$ 7,948