Note 2 - Certain Significant Estimates (Tables)

12 Months Ended

Dec. 25, 2021

Reserve For Customer Allowances [Member]

Notes Tables

Valuation and Qualifying Accounts [Table Text Block]

In Thousands	2021			2020			2019
Beginning balance	$	2,296		$	1,292		$	1,550
Additions		12,930			11,940			7,292
Deductions		(12,886	)		(10,936	)		(7,550	)
Ending balance	$	2,340		$	2,296		$	1,292

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

Notes Tables

Valuation and Qualifying Accounts [Table Text Block]

In Thousands	2021			2020			2019
Beginning balance	$	896		$	483		$	532
Additions (Reductions)		(408	)		473			322
Deductions		(31	)		(60	)		(371	)
Ending balance	$	457		$	896		$	483

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

Notes Tables

Valuation and Qualifying Accounts [Table Text Block]

In Thousands	2021			2020			2019
Beginning balance	$	697		$	786		$	456
Additions		446			831			756
Deductions		(395	)		(920	)		(426	)
Ending balance	$	748		$	697		$	786

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

Notes Tables

Schedule of Product Warranty Liability [Table Text Block]

In Thousands	2021			2020			2019
Beginning balance	$	962		$	688		$	702
Additions		2,487			1,648			1,736
Deductions		(2,330	)		(1,374	)		(1,750	)
Ending balance	$	1,119		$	962		$	688