Revenue Recognition: Schedule Of Revenues By Product Category (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2021	Mar. 31, 2020
Sales, net	$ 10,964	$ 10,902
Obstetrics
Sales, net	1,018
Gynecology/Electrosurgery/Urology
Sales, net	5,127
Neonatal
Sales, net	1,587
Blood Pressure Monitoring and Accessories
Sales, net	3,232
DomesticUsMember
Sales, net	6,783
DomesticUsMember \| Obstetrics
Sales, net	904
DomesticUsMember \| Gynecology/Electrosurgery/Urology
Sales, net	2,614
DomesticUsMember \| Neonatal
Sales, net	1,173
DomesticUsMember \| Blood Pressure Monitoring and Accessories
Sales, net	2,092
OutsideUsMember
Sales, net	4,181
OutsideUsMember \| Obstetrics
Sales, net	114
OutsideUsMember \| Gynecology/Electrosurgery/Urology
Sales, net	2,513
OutsideUsMember \| Neonatal
Sales, net	414
OutsideUsMember \| Blood Pressure Monitoring and Accessories
Sales, net	$ 1,140

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.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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+ Details