Revenue Recognition: Schedule Of Revenues By Product Category (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Sales, net	$ 10,965	$ 10,829	$ 21,852	$ 21,088
Obstetrics
Sales, net	1,095
Gynecology/Electrosurgery/Urology
Sales, net	6,073
Neonatal
Sales, net	1,735
Blood Pressure Monitoring and Accessories
Sales, net	2,062
DomesticUsMember
Sales, net	5,481
DomesticUsMember | Obstetrics
Sales, net	891
DomesticUsMember | Gynecology/Electrosurgery/Urology
Sales, net	2,378
DomesticUsMember | Neonatal
Sales, net	1,031
DomesticUsMember | Blood Pressure Monitoring and Accessories
Sales, net	1,181
OutsideUsMember
Sales, net	5,484
OutsideUsMember | Obstetrics
Sales, net	204
OutsideUsMember | Gynecology/Electrosurgery/Urology
Sales, net	3,695
OutsideUsMember | Neonatal
Sales, net	704
OutsideUsMember | Blood Pressure Monitoring and Accessories
Sales, net	$ 881