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, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	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, 2021	Dec. 31, 2020	Dec. 31, 2019
Sales, net (notes 1, 3, 9 and 11)	$ 12,914	$ 12,572	$ 12,604	$ 10,964	$ 12,010	$ 10,479	$ 8,787	$ 10,902	$ 11,831	$ 12,494	$ 11,846	$ 10,732	$ 49,054	$ 42,178	$ 46,904
OUS
Sales, net (notes 1, 3, 9 and 11)													18,395	16,312	19,411
OUS | Obstetrics
Sales, net (notes 1, 3, 9 and 11)													735	846	947
OUS | Gynecology/Electrosurgery/Urology
Sales, net (notes 1, 3, 9 and 11)													11,053	9,934	13,731
OUS | Neonatal
Sales, net (notes 1, 3, 9 and 11)													1,347	1,490	1,412
OUS | Blood Pressure Monitoring and Accessories
Sales, net (notes 1, 3, 9 and 11)													$ 5,260	$ 4,042	$ 3,321