Note 11 - Retirement Fund and Profit Sharing Plan (Tables)

9 Months Ended

Sep. 30, 2019

Notes Tables

Schedule of Net Benefit Costs [Table Text Block]

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2019		2018		2019		2018
Service cost	$	144	$	183	$	432	$	549
Interest cost		185		166		555		498
Net amortization		48		111		144		332
Net periodic benefit cost	$	377	$	460	$	1,131	$	1,379

Schedule of Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block]

	September 30,		December 31,
	2019		2018
Prior service cost	$	783	$	918
Net loss		1,968		1,977
	$	2,751	$	2,895