Note 2 - Certain Significant Estimates (Tables)

12 Months Ended

Dec. 31, 2023

Reserve For Customer Allowances [Member]

Notes Tables

Valuation and Qualifying Accounts [Table Text Block]

In Thousands	2023			2022			2021
Beginning balance	$	1,641		$	2,340		$	2,296
Additions		10,792			11,627			12,930
Deductions		(10,762	)		(12,326	)		(12,886	)
Ending balance	$	1,671		$	1,641		$	2,340

SEC Schedule, 12-09, Allowance, Credit Loss [Member]

Notes Tables

Valuation and Qualifying Accounts [Table Text Block]

In Thousands	2023			2022			2021
Beginning balance	$	492		$	457		$	896
Additions (Reductions)		566			108			(408	)
Deductions		(406	)		(73	)		(31	)
Ending balance	$	652		$	492		$	457

SEC Schedule, 12-09, Reserve, Inventory [Member]

Notes Tables

Valuation and Qualifying Accounts [Table Text Block]

In Thousands	2023			2022			2021
Beginning balance	$	1,568		$	748		$	697
Additions		725			1,083			446
Deductions		(1,402	)		(263	)		(395	)
Ending balance	$	891		$	1,568		$	748

SEC Schedule, 12-09, Reserve, Warranty [Member]

Notes Tables

Schedule of Product Warranty Liability [Table Text Block]

In Thousands	2023			2022			2021
Beginning balance	$	1,013		$	1,119		$	962
Additions		528			2,472			2,487
Deductions		(951	)		(2,578	)		(2,330	)
Ending balance	$	590		$	1,013		$	1,119