Condensed Consolidated Statements of Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Net loss	$ (31)	$ (1,891)	$ (1,773)	$ (5,434)
Changes in unrealized losses	(100)	(50)	(456)	332
Reclassification adjustments for gains included in net loss	(30)	(27)	(22)	(39)
Net change	(130)	(77)	(478)	293
Changes in unrealized gains	0	0	31	52
Reclassification adjustments for gains included in net loss	0	0	(31)	(52)
Net change	0	0	0	0
Amortization of actuarial loss and prior service benefit	6	6	18	18
Net change	6	6
Foreign currency translation adjustments, net	23	(63)	26	(110)
Other comprehensive income (loss)	(101)	(134)	(434)	201
Comprehensive loss	(132)	(2,025)	(2,207)	(5,233)
Changes in unrealized gains (losses)	$ (100)	$ (50)	$ (456)	$ 332