Note 6 - Warranty and Service Contracts (Tables)

6 Months Ended

Jun. 30, 2018

Notes Tables

Schedule of Product Warranty Liability [Table Text Block]

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2018		2017		2018		2017
Beginning Balance	$	3,373	$	2,735	$	3,508	$	2,461
Add: Accruals for warranties issued during the period		2,311		1,944		4,575		4,079
Less: Settlements made during the period		(2,123)		(1,802)		(4,522)		(3,663)
Ending Balance	$	3,561	$	2,877	$	3,561	$	2,877