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Operating Segment Results (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Dec. 31, 2024
Segment Reporting Information [Line Items]      
Net sales $ 105,688 $ 121,198  
Cost of sales (exclusive of depreciation and amortization shown separately below) 91,646 101,086  
Selling, general, and administrative expense 11,170 13,348  
Depreciation 5,369 9,091  
Segment Reporting, Other Segment Item, Amount 2,292 2,456  
Operating Income (Loss) (4,789) (4,783)  
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest (7,814) (14,302)  
Interest expense 5,194 5,366  
Other Nonoperating Income (Expense) (2,169) 4,153  
Depreciation and amortization 8,774 12,547  
Segment, Expenditure, Addition to Long-Lived Assets 3,907 5,460  
Total assets 460,724   $ 456,893
Operating Segments | Mobile Solutions [Member]      
Segment Reporting Information [Line Items]      
Net sales 62,244 73,060  
Cost of sales (exclusive of depreciation and amortization shown separately below) 56,450 63,087  
Selling, general, and administrative expense 3,538 3,785  
Depreciation 4,209 7,572  
Segment Reporting, Other Segment Item, Amount 734 759  
Operating Income (Loss) (2,687) (2,143)  
Depreciation and amortization 5,047 8,409  
Segment, Expenditure, Addition to Long-Lived Assets 2,666 3,828  
Total assets 295,563   294,204
Operating Segments | Power Solutions [Member]      
Segment Reporting Information [Line Items]      
Net sales 43,508 48,238  
Cost of sales (exclusive of depreciation and amortization shown separately below) 35,268 38,110  
Selling, general, and administrative expense 2,682 3,260  
Depreciation 780 1,049  
Segment Reporting, Other Segment Item, Amount 1,755 1,840  
Operating Income (Loss) 3,023 3,979  
Depreciation and amortization 3,347 3,668  
Segment, Expenditure, Addition to Long-Lived Assets 874 995  
Total assets 128,474   124,460
Corporate, Non-Segment      
Segment Reporting Information [Line Items]      
Depreciation and amortization 380 470  
Segment, Expenditure, Addition to Long-Lived Assets 367 637  
Total assets 36,687   $ 38,229
Intersegment Eliminations [Member]      
Segment Reporting Information [Line Items]      
Net sales (64) (100)  
Cost of sales (exclusive of depreciation and amortization shown separately below) (72) (111)  
Selling, general, and administrative expense 4,950 6,303  
Depreciation 380 470  
Segment Reporting, Other Segment Item, Amount (197) (143)  
Operating Income (Loss) $ (5,125) $ (6,619)