Note 1 - Summary of Significant Accounting Policies (Details Textual)		3 Months Ended
	Oct. 01, 2023 USD ($)	Mar. 30, 2024 USD ($) shares	Apr. 01, 2023 USD ($) shares	Dec. 30, 2023 USD ($)
Accounts Receivable, Allowance for Credit Loss		$ 400,000		$ 300,000
Capitalized Computer Software, Gross		11,400,000		12,200,000
Capitalized Computer Software, Amortization		$ 709,000	$ 700,000
Number of Operating Segments		3
Number of Reportable Segments		1
Goodwill and Intangible Asset Impairment, Total	$ 0
Amortization of Debt Issuance Costs			49,000
Realized Gain (Loss), Foreign Currency Transaction, before Tax		$ 500,000	$ 400,000
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) | shares		5,000	112,000
Revenue, Remaining Performance Obligation, Amount		$ 6,100,000
Provision for Doubtful Accounts		0
Contract with Customer, Asset, after Allowance for Credit Loss, Total		0
Contract with Customer, Liability		8,200,000		8,800,000
Deferred Profit		3,021,000		3,586,000	[1]
Deferred Profit Long-term		4,800,000		4,900,000
Accumulated Other Comprehensive Income (Loss), Net of Tax		$ (44,287,000)		$ (34,779,000)	[1]
Computer Software, Intangible Asset [Member]
Finite-Lived Intangible Asset, Useful Life (Year)		7 years
Minimum [Member]
Standard Product Warranty Term (Month)		12 months
Maximum [Member]
Standard Product Warranty Term (Month)		36 months
Building [Member] | Minimum [Member]
Property, Plant and Equipment, Useful Life (Year)		30 years
Building [Member] | Maximum [Member]
Property, Plant and Equipment, Useful Life (Year)		40 years
Building Improvements [Member] | Minimum [Member]
Property, Plant and Equipment, Useful Life (Year)		5 years
Building Improvements [Member] | Maximum [Member]
Property, Plant and Equipment, Useful Life (Year)		15 years
Machinery, Equipment and Software [Member] | Minimum [Member]
Property, Plant and Equipment, Useful Life (Year)		3 years
Machinery, Equipment and Software [Member] | Maximum [Member]
Property, Plant and Equipment, Useful Life (Year)		10 years

[1] Derived from December 30, 2023 audited financial statements