Note 18 - Concentrations

3 Months Ended

Mar. 31, 2019

Notes to Financial Statements

Concentration Risk Disclosure [Text Block]

18.

CONCENTRATIONS

The Company's major product lines are natural gas infrastructure and high-tech solutions in the Energy segment and power and electromechanical products in the Power and Electromechanical segment. The Company had the following revenue concentrations by customer greater than

10%

of consolidated revenue:

For the Three Months Ended March 31, 2019:
Customer	Segment	Percent
Digi-Key Corporation	Power and Electromechanical		18	%
Future Electronics	Power and Electromechanical		10	%
Total concentrations			28	%

For the Three Months Ended March 31, 2018:
Customer	Segment	Percent
Digi-Key Corporation	Power and Electromechanical		25	%
Future Electronics	Power and Electromechanical		12	%
Total concentrations			37	%

The Company had the following geographic revenue concentrations outside the U.S.A. greater than

10%

of consolidated revenue:

For the Three Months Ended March 31, 2019:
Country	Percent
United Kingdom		15	%
Total concentrations		15	%

For the Three Months Ended March 31, 2018:
Country	Percent
United Kingdom		15	%
Total concentrations		15	%

The Company did

not

have any gross trade accounts receivable concentrations by customer greater than

10%

of gross trade accounts receivable at

March 31, 2019

or

December 31, 2018.

The Company had the following geographic concentrations of gross trade accounts receivable outside of the U.S.A. greater than

10%

of gross trade accounts receivable:

As of March 31, 2019:
Country	Percent
United Kingdom		22	%
Total concentrations		22	%

As of December 31, 2018:
Country	Percent
United Kingdom		29	%
Total concentrations		29	%

There were

no

supplier concentrations greater than

10%

during the

three

months ended

March 31, 2019

and

March 31, 2018.