Rendering

Component: (Network and Table)
Network
000670 - Disclosure - Note 12 - Geographic Information: Schedule of Sales by Geographic Location (Details)
(http://www.es.com/20161231/role/idr_DisclosureNote12GeographicInformationScheduleOfSalesByGeographicLocationDetails)
TableStatement [Table]
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0000276283 (http://www.sec.gov/CIK)
Statement [Line Items]Period [Axis]
2016-01-01 - 2016-12-31
2015-01-01 - 2015-12-31
Geographical [Axis]Geographical [Axis]
UNITED STATESInternationalGeographicalUNITED STATESInternationalGeographical
Sales
24,994,000  
7,950,000  
32,944,000  
16,809,000  
18,489,000  
35,298,000