Note 2 - Certain Significant Estimates (Tables)

12 Months Ended

Dec. 31, 2022

Reserve For Customer Allowances [Member]

Notes Tables

Valuation and Qualifying Accounts [Table Text Block]

In Thousands	2022			2021			2020
Beginning balance	$	2,340		$	2,296		$	1,292
Additions		11,627			12,930			11,940
Deductions		(12,326	)		(12,886	)		(10,936	)
Ending balance	$	1,641		$	2,340		$	2,296

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

Notes Tables

Valuation and Qualifying Accounts [Table Text Block]

In Thousands	2022			2021			2020
Beginning balance	$	457		$	896		$	483
Additions (Reductions)		108			(408	)		473
Deductions		(73	)		(31	)		(60	)
Ending balance	$	492		$	457		$	896

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

Notes Tables

Valuation and Qualifying Accounts [Table Text Block]

In Thousands	2022			2021			2020
Beginning balance	$	748		$	697		$	786
Additions		1,083			446			831
Deductions		(263	)		(395	)		(920	)
Ending balance	$	1,568		$	748		$	697

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

Notes Tables

Schedule of Product Warranty Liability [Table Text Block]

In Thousands	2022			2021			2020
Beginning balance	$	1,119		$	962		$	688
Additions		2,472			2,487			1,648
Deductions		(2,578	)		(2,330	)		(1,374	)
Ending balance	$	1,013		$	1,119		$	962