Note 19 - Concentrations (Tables)

9 Months Ended

Sep. 30, 2018

Notes Tables

Schedules of Concentration of Risk, by Risk Factor [Table Text Block]

For the Three Months Ended September 30, 2018:
Customer	Segment	Percent
Digi-Key Corporation	Power and Electromechanical		26	%
Future Electronics	Power and Electromechanical		13	%
Total concentrations			39	%

For the Three Months Ended September 30, 2017:
Customer	Segment	Percent
Digi-Key Corporation	Power and Electromechanical		27	%
Total concentrations			27	%

For the Nine Months Ended September 30, 2018:
Customer	Segment	Percent
Digi-Key Corporation	Power and Electromechanical		26	%
Future Electronics	Power and Electromechanical		13	%
Total concentrations			39	%

For the Nine Months Ended September 30, 2017:
Customer	Segment	Percent
Digi-Key Corporation	Power and Electromechanical		26	%
Total concentrations			26	%

For the Three Months Ended September 30, 2018:
Country	Percent
United Kingdom		15	%
Total concentrations		15	%

For the Three Months Ended September 30, 2017:
Country	Percent
United Kingdom		17	%
Total concentrations		17	%

For the Nine Months Ended September 30, 2018:
Country	Percent
United Kingdom		13	%
Total concentrations		13	%

For the Nine Months Ended September 30, 2017:
Country	Percent
United Kingdom		17	%
Total concentrations		17	%

As of September 30, 2018
Customer	Segment	Percent
Future Electronics	Power and Electromechanical		12	%
Total concentrations			12	%

As of December 31, 2017
Customer	Segment	Percent
GL Industrial Services UK Ltd.	Energy		11	%
Digi-Key Electronics	Power and Electromechanical		10	%
Total concentrations			21	%

As of September 30, 2018:
Country	Percent
United Kingdom		26	%
Canada		11	%
Total concentrations		37	%

As of December 31, 2017:
Country	Percent
United Kingdom		28	%
Canada		11	%
Total concentrations		39	%