Annual report [Section 13 and 15(d), not S-K Item 405]

Income Taxes (Details Textual)

v3.25.0.1
Income Taxes (Details Textual) - USD ($)
$ in Millions
 12 Months Ended
Dec. 28, 2024
Dec. 28, 2024
Dec. 30, 2023
Dec. 31, 2022
Jan. 01, 2022
Income Tax Disclosure [Line Items]          
Net operating losses $ 6.2 $ 6.2 $ 6.2    
Investment tax credits   0.3      
Unrecognized tax benefits 5.4 5.4 6.1 $ 7.9 $ 9.0
Unrecognized tax benefits that would impact effective tax rate 0.4 $ 0.4      
Federal returns currently under examination   The Company remains subject to income tax examinations in the U.S. and various state and foreign jurisdictions for tax years 2019-2024. The Company believes it has adequately reserved for income taxes that could result from any audit adjustments. Although the timing of the resolution and/or closure of audits is highly uncertain, it is reasonably possible that the balance of gross unrecognized tax benefits could significantly change in the next 12 months.      
Deferred tax assets valuation allowance 2.3 $ 2.3 $ 3.0    
Deferred tax assets capital losses 1.0 1.0      
Decrease in Valuation Allowance   0.7      
Federal [Member]          
Income Tax Disclosure [Line Items]          
Net operating loss carryforwards $ 5.4 $ 5.4      
Operating loss carryforwards expiration year   2027      
Federal [Member] | Minimum [Member]          
Income Tax Disclosure [Line Items]          
Operating loss carryforwards expiration year   2031      
Federal [Member] | Maximum [Member]          
Income Tax Disclosure [Line Items]          
Operating loss carryforwards expiration year 2032        
Federal [Member] | California [Member]          
Income Tax Disclosure [Line Items]          
Operating loss carryforwards expiration year   2027      
Operating loss carryforward preacquisition tax year description   The federal and California NOLs were generated by Balboa Water Group during pre-acquisition tax years 2011-2019 and are subject to a 20-year carryforward period.      
Operating loss carryforward period   20 years      
Operating loss carryforwards, limitations on use   IRC Section 382 limits the use of NOLs to the extent there has been an ownership change of more than 50 percent.      
Federal [Member] | California [Member] | Minimum [Member]          
Income Tax Disclosure [Line Items]          
Operating loss carryforwards ownership percentage change limit under IRC     50.00%    
State [Member]          
Income Tax Disclosure [Line Items]          
Net operating loss carryforwards $ 34.9 $ 34.9      
State [Member] | Minimum [Member]          
Income Tax Disclosure [Line Items]          
Operating loss carryforwards expiration year   2025      
State [Member] | Maximum [Member]          
Income Tax Disclosure [Line Items]          
Operating loss carryforwards expiration year   2044      
Foreign [Member]          
Income Tax Disclosure [Line Items]          
Net operating loss carryforwards 16.7 $ 16.7      
Unutilized, Operating Loss Carry Forwards 7.1 7.1      
Deferred tax assets capital losses 1.3 1.3      
Indefinite-lived, Operating loss carryforwards $ 7.1 $ 7.1      
Foreign [Member] | Minimum [Member]          
Income Tax Disclosure [Line Items]          
Operating loss carryforwards expiration year   2027      
Foreign [Member] | Maximum [Member]          
Income Tax Disclosure [Line Items]          
Operating loss carryforwards expiration year   2044      
Parent Company [Member]          
Income Tax Disclosure [Line Items]          
Third party export sales   $ 124.7 $ 131.8 $ 146.5