Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Net loss	$ (288)	$ (586)	$ (2,041)	$ (3,452)
Available-for-sale securities:
Changes in unrealized (losses) gains	(161)	156	(823)	360
Reclassification adjustments for losses included in net loss	38	11	37	58
Net change	(123)	167	(786)	418
Cash flow hedges:
Changes in unrealized (losses) gains	(29)	49	(29)	192
Reclassification adjustments for (gains) losses included in net loss	9	(78)	9	(153)
Net change	(20)	(29)	(20)	39
Change in unrealized components of defined benefit plans:
Amortization of actuarial loss and prior service benefit	5	5	10	10
Net change	5	5	10	10
Foreign currency translation adjustments, net	(43)	3	(28)	(6)
Net current period other comprehensive income	(181)	146	(824)	461
Comprehensive loss	(469)	(440)	(2,865)	(2,991)
Net loss	$ (288)	$ (586)	$ (2,041)	$ (3,452)