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Operating Segment Results - (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Segment Reporting Information [Line Items] |  |  |
Net sales | $ 464,290 | $ 489,270 | $ 498,738
Cost of sales (exclusive of depreciation and amortization shown separately below) | 394,812 | 419,175 | 421,105
Selling, General and Administrative Expense | 49,481 | 47,436 | 49,635
Depreciation expense | 31,579 | 31,953 | 31,404
Segment Reporting, Other Segment Item, Amount | 15,966 | 12,510 | 17,686
Operating Income (Loss) | (27,548) | (21,804) | (21,092)
Depreciation and amortization | 45,302 | 46,120 | 47,231
Expenditures for long-lived assets | 18,314 | 20,496 | 17,952
Assets | 456,893 | 510,885 |
Investment in joint venture | 34,971 | 32,701 |
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest | (45,434) | (53,671) | (31,069)
Operating Segments | Mobile Solutions |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 283,944 | 303,335 | 293,536
Cost of sales (exclusive of depreciation and amortization shown separately below) | 251,847 | 271,110 | 253,906
Selling, General and Administrative Expense | 14,672 | 14,471 | 13,559
Depreciation expense | 26,027 | 25,803 | 24,839
Segment Reporting, Other Segment Item, Amount | 9,476 | 3,700 | 3,397
Operating Income (Loss) | (18,078) | (11,749) | (2,165)
Depreciation and amortization | 29,381 | 29,156 | 28,192
Expenditures for long-lived assets | 13,438 | 15,387 | 14,590
Assets | 294,204 | 329,610 |
Operating Segments | Power Solutions |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 180,545 | 185,948 | 205,204
Cost of sales (exclusive of depreciation and amortization shown separately below) | 143,197 | 148,096 | 167,206
Selling, General and Administrative Expense | 12,987 | 13,104 | 15,147
Depreciation expense | 3,994 | 4,504 | 5,009
Segment Reporting, Other Segment Item, Amount | 7,256 | 9,148 | 14,306
Operating Income (Loss) | 13,111 | 11,096 | 3,536
Depreciation and amortization | 14,363 | 15,318 | 17,483
Expenditures for long-lived assets | 3,252 | 3,643 | 2,401
Assets | 124,460 | 147,155 |
Corporate, Non-Segment |  |  |
Segment Reporting Information [Line Items] |  |  |
Depreciation and amortization | 1,558 | 1,646 | 1,556
Expenditures for long-lived assets | 1,624 | 1,466 | 961
Assets | 38,229 | 34,120 |
Intersegment Eliminations [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | (199) | (13) | (2)
Cost of sales (exclusive of depreciation and amortization shown separately below) | (232) | (31) | (7)
Selling, General and Administrative Expense | 21,822 | 19,861 | 20,929
Depreciation expense | 1,558 | 1,646 | 1,556
Segment Reporting, Other Segment Item, Amount | (766) | (338) | (17)
Operating Income (Loss) | $ (22,581) | $ (21,151) | $ (22,463)

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