Note 4 - Net Sales (Tables)

9 Months Ended

Sep. 30, 2019

Notes Tables

Schedule of Accounts Receivables and Contract Assets [Table Text Block]

	September 30,		December 31,
	2019		2018
Accounts receivable - trade	$	75,597	$	64,017
Current contract assets		38,030		49,236
Current contract liabilities		1,372		437