Revenue Recognition: Schedule Of Revenues By Product Category (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Sales, net	$ 11,846	$ 10,965	$ 22,579	$ 21,852
Obstetrics
Sales, net	1,232		2,571
Gynecology/Electrosurgery/Urology
Sales, net	6,763		12,345
Neonatal
Sales, net	1,436		2,947
Blood Pressure Monitoring and Accessories
Sales, net	2,415		4,716
DomesticUsMember
Sales, net	6,996		12,791
DomesticUsMember | Obstetrics
Sales, net	1,038		2,064
DomesticUsMember | Gynecology/Electrosurgery/Urology
Sales, net	3,229		5,307
DomesticUsMember | Neonatal
Sales, net	1,149		2,320
DomesticUsMember | Blood Pressure Monitoring and Accessories
Sales, net	1,580		3,100
OutsideUsMember
Sales, net	4,850		9,788
OutsideUsMember | Obstetrics
Sales, net	194		507
OutsideUsMember | Gynecology/Electrosurgery/Urology
Sales, net	3,534		7,038
OutsideUsMember | Neonatal
Sales, net	287		627
OutsideUsMember | Blood Pressure Monitoring and Accessories
Sales, net	$ 835		$ 1,616