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Note 3 - Accumulated Other Comprehensive Loss - Reclassified out of AOCI (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Amounts reclassified from accumulated other comprehensive loss to net loss $ 139 $ 136
Amounts reclassified from accumulated other comprehensive loss to net loss 561 275
Total reclassifications 700 411
Interest Expense [Member]    
Amount reclassified from AOCI into income 139 136
Income Tax Expense (Benefit) [Member]    
Income tax
Income tax (56)
General and Administrative Expense [Member]    
Amortization of net losses included in net periodic pension costs $ 561 $ 331