Revenue Recognition: Schedule Of Revenues By Product Category (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Sales, net	$ 10,902	$ 10,732
Obstetrics
Sales, net	1,158
Gynecology/Electrosurgery/Urology
Sales, net	5,892
Neonatal
Sales, net	1,584
Blood Pressure Monitoring and Accessories
Sales, net	2,268
DomesticUsMember
Sales, net	6,443
DomesticUsMember \| Obstetrics
Sales, net	909
DomesticUsMember \| Gynecology/Electrosurgery/Urology
Sales, net	2,817
DomesticUsMember \| Neonatal
Sales, net	1,141
DomesticUsMember \| Blood Pressure Monitoring and Accessories
Sales, net	1,576
OutsideUsMember
Sales, net	4,459
OutsideUsMember \| Obstetrics
Sales, net	249
OutsideUsMember \| Gynecology/Electrosurgery/Urology
Sales, net	3,075
OutsideUsMember \| Neonatal
Sales, net	443
OutsideUsMember \| Blood Pressure Monitoring and Accessories
Sales, net	$ 692

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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+ Details