Revenue Recognition: Schedule Of Revenues By Product Category (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Sales, net	$ 10,390	$ 10,125	$ 32,242	$ 31,213
Obstetrics
Sales, net	1,087
Gynecology/Electrosurgery/Urology
Sales, net	5,506
Neonatal
Sales, net	1,602
Blood Pressure Monitoring and Accessories
Sales, net	2,195
DomesticUsMember
Sales, net	5,269
DomesticUsMember | Obstetrics
Sales, net	973
DomesticUsMember | Gynecology/Electrosurgery/Urology
Sales, net	1,806
DomesticUsMember | Neonatal
Sales, net	1,138
DomesticUsMember | Blood Pressure Monitoring and Accessories
Sales, net	1,352
OutsideUsMember
Sales, net	5,121
OutsideUsMember | Obstetrics
Sales, net	114
OutsideUsMember | Gynecology/Electrosurgery/Urology
Sales, net	3,700
OutsideUsMember | Neonatal
Sales, net	464
OutsideUsMember | Blood Pressure Monitoring and Accessories
Sales, net	$ 843