Note 5 - Net Sales (Tables)

3 Months Ended

Mar. 31, 2020

Notes Tables

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

	March 31,		December 31,
	2020		2019
Accounts receivable - trade	$	73,551	$	79,746
Current contract assets		38,234		38,533
Current contract liabilities		17,646		1,821