Revenue Recognition: Schedule Of Revenues By Product Category (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Sales, net	$ 12,494	$ 10,390	$ 35,073	$ 32,242
Obstetrics
Sales, net	1,276		3,847
Gynecology/Electrosurgery/Urology
Sales, net	6,394		18,740
Neonatal
Sales, net	1,588		4,533
Blood Pressure Monitoring and Accessories
Sales, net	3,236		7,953
DomesticUsMember
Sales, net	7,575		20,366
DomesticUsMember | Obstetrics
Sales, net	1,072		3,137
DomesticUsMember | Gynecology/Electrosurgery/Urology
Sales, net	3,195		8,503
DomesticUsMember | Neonatal
Sales, net	1,228		3,545
DomesticUsMember | Blood Pressure Monitoring and Accessories
Sales, net	2,080		5,181
OutsideUsMember
Sales, net	4,919		14,707
OutsideUsMember | Obstetrics
Sales, net	204		710
OutsideUsMember | Gynecology/Electrosurgery/Urology
Sales, net	3,199		10,237
OutsideUsMember | Neonatal
Sales, net	360		988
OutsideUsMember | Blood Pressure Monitoring and Accessories
Sales, net	$ 1,156		$ 2,772