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Operating Segment Results (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Segment Reporting Information [Line Items]          
Net sales $ 103,882 $ 113,587 $ 317,492 $ 357,777  
Cost of sales (exclusive of depreciation and amortization shown separately below) 86,410 97,131 267,755 299,474  
Selling, general, and administrative expense 11,059 10,257 34,325 37,116  
Depreciation 5,659 7,439 16,539 24,835  
Segment Reporting, Other Segment Item, Amount 3,001 2,510 7,374 7,032  
Operating Income (Loss) (2,247) (3,750) (8,501) (10,680)  
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest (7,843) (3,839) (25,167) (22,700)  
Interest expense 5,666 5,404 16,517 16,643  
Other Nonoperating Income (Expense) (70) (5,315) (2,858) (4,623)  
Depreciation and amortization 9,064 10,844 26,756 35,152  
Segment, Expenditure, Addition to Long-Lived Assets 3,428 6,300 11,058 15,352  
Total assets 450,962   450,962   $ 456,893
Gain (Loss) on Extinguishment of Debt 0 0 3,007 0  
Operating Segments | Mobile Solutions [Member]          
Segment Reporting Information [Line Items]          
Net sales 59,117 70,678 184,752 216,593  
Cost of sales (exclusive of depreciation and amortization shown separately below) 52,286 62,072 164,553 188,128  
Selling, general, and administrative expense 3,830 3,080 11,153 11,055  
Depreciation 4,451 6,049 12,954 20,491  
Segment Reporting, Other Segment Item, Amount 1,404 918 2,743 2,133  
Operating Income (Loss) (2,854) (1,441) (6,651) (5,214)  
Depreciation and amortization 5,290 6,887 15,469 23,006  
Segment, Expenditure, Addition to Long-Lived Assets 2,377 5,245 7,907 11,427  
Total assets 292,003   292,003   294,204
Operating Segments | Power Solutions [Member]          
Segment Reporting Information [Line Items]          
Net sales 44,948 42,935 133,096 141,324  
Cost of sales (exclusive of depreciation and amortization shown separately below) 34,318 35,093 103,583 111,512  
Selling, general, and administrative expense 2,586 2,522 7,654 9,385  
Depreciation 818 1,027 2,402 3,154  
Segment Reporting, Other Segment Item, Amount 1,794 1,788 5,220 5,469  
Operating Income (Loss) 5,432 2,505 14,237 11,804  
Depreciation and amortization 3,385 3,594 10,103 10,956  
Segment, Expenditure, Addition to Long-Lived Assets 844 507 2,057 2,543  
Total assets 128,374   128,374   124,460
Corporate, Non-Segment          
Segment Reporting Information [Line Items]          
Depreciation and amortization 389 363 1,184 1,190  
Segment, Expenditure, Addition to Long-Lived Assets 207 548 1,094 1,382  
Total assets 30,585   30,585   $ 38,229
Intersegment Eliminations [Member]          
Segment Reporting Information [Line Items]          
Net sales (183) (26) (356) (140)  
Cost of sales (exclusive of depreciation and amortization shown separately below) (194) (34) (381) (166)  
Selling, general, and administrative expense 4,643 4,655 15,518 16,676  
Depreciation 390 363 1,183 1,190  
Segment Reporting, Other Segment Item, Amount (197) (196) (589) (570)  
Operating Income (Loss) $ (4,825) $ (4,814) $ (16,087) $ (17,270)