Revenue Concentrations, Significant Customers And Geographic Areas (Tables)

6 Months Ended

Jun. 30, 2017

Segment Reporting [Abstract]

Schedule of Sales By Geographic Area

Export sales by geographic area are summarized as follows:

	Three Months Ended June 30,				Six Months Ended June 30,
(In thousands)	2017		2016		2017		2016
Americas	$	397	$	29	$	817	$	770
Europe		3,756		5,756	6,571		9,871
Asia		7,813		9,262	13,974		20,647
Other		105		19	144		34
Total export sales	$	12,071	$	15,066	$	21,506	$	31,322