Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Net earnings (loss)	$ 12,795	$ (8,743)
Other comprehensive income (loss):
Currency translation adjustment, net of taxes of $8 and $9	6,890	2,603
Unrealized holding losses on marketable securities arising during the period, net of taxes of $7 and $0	7	0
Change in unfunded SERP liability, net of taxes of $738 and ($422)	(895)	(1,367)
Other comprehensive income:	6,002	1,236
Comprehensive income (loss)	$ 18,797	$ (7,507)