Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Net loss	$ (521)	$ (288)	$ (1,587)	$ (2,041)
Available-for-sale securities:
Changes in unrealized gains (losses)	598	(161)	1,350	(823)
Reclassification adjustments for (gains) losses included in net loss	(3)	38	43	37
Net change	595	(123)	1,393	(786)
Cash flow hedges:
Changes in unrealized gains (losses)	3	(29)	108	(29)
Reclassification adjustments for (gains) losses included in net loss	(23)	9	(105)	9
Net change	(20)	(20)	3	(20)
Change in unrealized components of defined benefit plans:
Amortization of actuarial loss and prior service benefit	4	5	8	10
Net change	4	5	8	10
Foreign currency translation adjustments, net		(43)	(26)	(28)
Net current period other comprehensive income (loss)	579	(181)	1,378	(824)
Comprehensive income (loss)	58	(469)	(209)	(2,865)
Net loss	$ (521)	$ (288)	$ (1,587)	$ (2,041)