Note 11 - Revenues By Product Category And Region: Schedule Of OUS 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
OUS
Sales, net (notes 1, 3, 9 and 11)													16,312	19,411	20,806
OUS | Obstetrics
Sales, net (notes 1, 3, 9 and 11)													846	947	698
OUS | Gynecology/Electrosurgery/Urology
Sales, net (notes 1, 3, 9 and 11)													9,934	13,731	15,022
OUS | Neonatal
Sales, net (notes 1, 3, 9 and 11)													1,490	1,412	2,252
OUS | Blood Pressure Monitoring and Accessories
Sales, net (notes 1, 3, 9 and 11)													$ 4,042	$ 3,321	$ 2,834