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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2021
Summary of Significant Accounting Policies |
Schedule of Accounts Receivable and Concentration of Credit Risk | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2021 |  | 2020 |  | 2019
Volvo | ​ | 9 | % | ​ | 8 | % | ​ | 8 | %
VW Group | ​ | 9 | % | ​ | 9 | % | ​ | 9 | %
Schedule of Inventory, Current | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
December 31 |  | 2021 |  | 2020
Raw materials | ​ | $ | 107,034 | ​ | $ | 67,775
Work-in-progress | ​ | ​ | 9,755 | ​ | ​ | 7,005
Finished goods | ​ | ​ | 21,326 | ​ | ​ | 15,768
Total inventories, net | ​ | $ | 138,115 | ​ | $ | 90,548
Property, Plant and Equipment | ​
Property, plant and equipment are recorded at cost and consist of the following: ​ | ​ | ​ | ​ | ​ | ​ | ​
December 31 |  | 2021 |  | 2020
Land and land improvements | ​ | $ | 3,064 | ​ | $ | 4,447
Buildings and improvements | ​ | ​ | 28,842 | ​ | ​ | 39,784
Machinery and equipment | ​ | ​ | 249,365 | ​ | ​ | 253,563
Office furniture and fixtures | ​ | ​ | 8,701 | ​ | ​ | 9,993
Tooling | ​ | ​ | 41,391 | ​ | ​ | 40,967
Information technology | ​ | ​ | 30,454 | ​ | ​ | 28,491
Vehicles | ​ | ​ | 741 | ​ | ​ | 654
Leasehold improvements | ​ | ​ | 5,592 | ​ | ​ | 5,198
Construction in progress | ​ | ​ | 12,584 | ​ | ​ | 19,744
Total property, plant, and equipment | ​ | ​ | 380,734 | ​ | ​ | 402,841
Less: accumulated depreciation | ​ | ​ | (272,833) | ​ | ​ | (283,517)
Property, plant and equipment, net | ​ | $ | 107,901 | ​ | $ | 119,324
Schedule of Property, Plant and Equipment Estimated Useful Lives | ​
​ | ​ | ​ | ​
Buildings and improvements |  | ​ | 10-40 years
Machinery and equipment | ​ | ​ | 3-10 years
Office furniture and fixtures | ​ | ​ | 3-10 years
Tooling | ​ | ​ | 2-7 years
Information technology | ​ | ​ | 3-7 years
Vehicles | ​ | ​ | 3-7 years
Leasehold improvements | ​ | ​ | shorter of lease term or 3-10 years
Schedule of Goodwill | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2021 | ​ | ​ | 2020
Balance at January 1 | ​ | $ | 39,104 | ​ | $ | 35,874
Currency translation | ​ | ​ | (2,717) | ​ | ​ | 3,230
Balance at December 31 | ​ | $ | 36,387 | ​ | $ | 39,104
​
Schedule of Acquired Finite-Lived Intangible Assets by Major Class | Other intangible assets, net at December 31, 2021 and 2020 consisted of the following:
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Acquisition | ​ | Accumulated | ​ | ​ | ​
As of December 31, 2021 |  | cost |  | amortization |  | Net
Customer lists | ​ | $ | 45,000 | ​ | $ | (20,240) | ​ | $ | 24,760
Tradenames | ​ | ​ | 16,016 | ​ | ​ | (6,655) | ​ | ​ | 9,361
Technology | ​ | ​ | 12,855 | ​ | ​ | (8,922) | ​ | ​ | 3,933
Capitalized software development | ​ | ​ | 12,433 | ​ | ​ | (624) | ​ | ​ | 11,809
Total | ​ | $ | 86,304 | ​ | $ | (36,441) | ​ | $ | 49,863
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Acquisition | ​ | Accumulated | ​ | ​ | ​
As of December 31, 2020 |  | cost |  | amortization |  | Net
Customer lists | ​ | $ | 48,339 | ​ | $ | (18,530) | ​ | $ | 29,809
Tradenames | ​ | ​ | 17,201 | ​ | ​ | (6,290) | ​ | ​ | 10,911
Technology | ​ | ​ | 13,799 | ​ | ​ | (8,079) | ​ | ​ | 5,720
Capitalized software development | ​ | ​ | 8,954 | ​ | ​ | - | ​ | ​ | 8,954
Total | ​ | $ | 88,293 | ​ | $ | (32,899) | ​ | $ | 55,394
Accrued Expenses and Other Current Liabilities | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
As of December 31 |  | 2021 |  | 2020
Compensation related liabilities | ​ | $ | 18,716 | ​ | $ | 21,852
Product warranty and recall obligations | ​ | ​ | 6,752 | ​ | ​ | 9,044
Other (A) | ​ | ​ | 44,671 | ​ | ​ | 21,376
Total accrued expenses and other current liabilities | ​ | $ | 70,139 | ​ | $ | 52,272
(A) | “Other” is comprised of miscellaneous accruals, none of which individually contributed a significant portion of the total.
Schedule of Product Warranty and Recall Liability | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
Year ended December 31, |  | 2021 |  | 2020
Product warranty and recall at beginning of period | ​ | $ | 12,691 | ​ | $ | 10,796
Accruals for warranties established during period | ​ | ​ | 7,037 | ​ | ​ | 5,898
Aggregate changes in pre-existing liabilities due to claim developments | ​ | ​ | 201 | ​ | ​ | 1,794
Settlements made during the period | ​ | ​ | (9,647) | ​ | ​ | (6,297)
Foreign currency translation | ​ | ​ | (436) | ​ | ​ | 500
Product warranty and recall at end of period | ​ | $ | 9,846 | ​ | $ | 12,691
Schedule of Weighted-Average Number of Shares | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
Year ended December 31, |  | 2021 |  | 2020 |  | 2019
Basic weighted-average Common Shares outstanding | ​ | 27,114,359 | ​ | 27,024,571 | ​ | 27,791,799
Effect of dilutive shares | ​ | 301,175 | ​ | - | ​ | 478,296
Diluted weighted-average Common Shares outstanding | ​ | 27,415,534 | ​ | 27,024,571 | ​ | 28,270,095
Schedule of Changes in Accumulated Other Comprehensive Loss by Component | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Foreign | ​ | Unrealized | ​ | ​ | ​
​ | ​ | currency | ​ | gain (loss) | ​ | ​ | ​
​ |  | translation |  | on derivatives |  | Total
Balance at January 1, 2021 | ​ | $ | (88,795) | ​ | $ | (840) | ​ | $ | (89,635)
Other comprehensive (loss) income before reclassifications | ​ | ​ | (8,408) | ​ | ​ | 859 | ​ | ​ | (7,549)
Amounts reclassified from accumulated other comprehensive loss | ​ | ​ | - | ​ | ​ | 160 | ​ | ​ | 160
Net other comprehensive (loss) income, net of tax | ​ | ​ | (8,408) | ​ | ​ | 1,019 | ​ | ​ | (7,389)
Balance at December 31, 2021 | ​ | $ | (97,203) | ​ | $ | 179 | ​ | $ | (97,024)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Balance at January 1, 2020 | ​ | $ | (91,472) | ​ | $ | - | ​ | $ | (91,472)
Other comprehensive income (loss) before reclassifications | ​ | ​ | 2,677 | ​ | ​ | (2,366) | ​ | ​ | 311
Amounts reclassified from accumulated other comprehensive loss | ​ | ​ | - | ​ | ​ | 1,526 | ​ | ​ | 1,526
Net other comprehensive income (loss), net of tax | ​ | ​ | 2,677 | ​ | ​ | (840) | ​ | ​ | 1,837
Balance at December 31, 2020 | ​ | $ | (88,795) | ​ | $ | (840) | ​ | $ | (89,635)

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