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Summary Of Significant Accounting Policies (Narrative) (Details). - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Summary Of Significant Accounting Policies [Line Items]      
Foreign Currency Transaction Gain (Loss), before Tax $ (300) $ (200) $ (800)
Cash 7,100 13,100  
Cash and cash equivalents 7,062 9,660  
Goodwill 22,446 35,717 70,608
Goodwill impairment $ 13,271 $ 34,891 $ 0
Incremental shares excluded from the calculation of incremental shares attributable to stock options and restricted stock 2,497,008 2,925,091 2,760,983
Increase (decrease) in cash, cash equivalents and restricted cash $ (6,393) $ (5,777) $ (11,289)
Cash and cash equivalents 7,062 13,051  
Cash and cash equivalents 0 3,391  
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Continuing Operations 3,600    
Restricted Cash for ABL Facility      
Summary Of Significant Accounting Policies [Line Items]      
Cash and cash equivalents   3,400  
Aluminum Extrusions      
Summary Of Significant Accounting Policies [Line Items]      
Goodwill 0 13,271 $ 13,271
Goodwill impairment (13,271) 0  
Surface protection films      
Summary Of Significant Accounting Policies [Line Items]      
Goodwill 22,400    
Goodwill impairment   34,900  
Goodwill, Impairment Loss, Net of Tax   27,000  
Aluminum Extrusions      
Summary Of Significant Accounting Policies [Line Items]      
Goodwill impairment 13,300    
Goodwill, Impairment Loss, Net of Tax $ 10,400    
Minimum | Buildings And Land Improvements      
Summary Of Significant Accounting Policies [Line Items]      
Average useful life 5 years    
Minimum | Machinery and Equipment      
Summary Of Significant Accounting Policies [Line Items]      
Average useful life 2 years    
Maximum | Buildings And Land Improvements      
Summary Of Significant Accounting Policies [Line Items]      
Average useful life 40 years    
Maximum | Machinery and Equipment      
Summary Of Significant Accounting Policies [Line Items]      
Average useful life 20 years    
Foreign Country      
Summary Of Significant Accounting Policies [Line Items]      
Cash and cash equivalents $ 1,600 $ 800