Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Net income (loss)	$ 484	$ 405	$ (1,103)	$ (1,637)
Available-for-sale securities:
Changes in unrealized gains	142	26	1,492	(797)
Reclassification adjustments for losses (gains) included in net income	7	(1)	50	36
Net change	149	25	1,542	(761)
Cash flow hedges:
Changes in unrealized gains		13	108	(16)
Reclassification adjustments for losses included in net income		7	(105)	16
Net change		20	3
Change in unrealized components of defined benefit plans:
Amortization of actuarial loss and prior service benefit	4	5	12	15
Foreign currency translation adjustments, net	19	(10)	(7)	(38)
Other comprehensive income	172	40	1,550	(784)
Comprehensive income	656	445	447	(2,421)
Net income (loss)	$ 484	$ 405	$ (1,103)	$ (1,637)