14. Foreign Customer Sales (Tables)

12 Months Ended

Dec. 31, 2017

Risks and Uncertainties [Abstract]

Schedule of foreign customer sales

	Year Ended December 31,
(In thousands)	2017		2016
Canada, Mexico & South/Central America	$	3,067	$	2,608
Pacific Rim		3,678		2,418
Europe, Africa & Middle East		11,591		9,594
Total Foreign Sales	$	18,336	$	14,620