Note 5 - Inventory (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

Schedule of Inventory, Current [Table Text Block]

	2019			2018
At average cost (approximates current cost)
Finished goods	$	22,564		$	23,658
Work in process		2,768			2,100
Raw materials and supplies		20,121			23,909
		45,453			49,667
LIFO reserve		(7,880	)		(10,371	)
Total inventory	$	37,573		$	39,296