Schedule of Changes in Balances of Component of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	$ (282)
Total change in accumulated other comprehensive income	(99)	$ 58
Ending balance	(381)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(282)	(6,409)
Current period change, excluding amounts reclassified from accumulated other comprehensive income
Amounts reclassified from accumulated other comprehensive income	(99)	58
Total change in accumulated other comprehensive income	(99)	58
Ending balance	$ (381)	$ (6,351)