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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables) | 12 Months Ended
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Dec. 31, 2022
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |
Schedule of inventories, net of reserves | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, | ​ | December 31,
​ |  | 2022 |  | 2021
Chassis | ​ | $ | 18,604 | ​ | $ | 5,753
Raw materials | ​ |  | 75,934 | ​ |  | 59,651
Work in process | ​ |  | 40,655 | ​ |  | 33,994
Finished goods | ​ |  | 18,463 | ​ |  | 15,510
​ | ​ | $ | 153,656 | ​ | $ | 114,908
​
Schedule of property, plant and equipment | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2022 |  | 2021
Land and improvements | ​ | $ | 16,855 | ​ | $ | 15,495
Buildings and improvements | ​ |  | 83,220 | ​ |  | 78,144
Machinery and equipment | ​ |  | 78,959 | ​ |  | 59,886
Furniture and fixtures | ​ |  | 12,451 | ​ |  | 11,457
Software costs | ​ |  | 10,897 | ​ |  | 10,383
​ | ​ |  | 202,382 | ​ |  | 175,365
Less accumulated depreciation | ​ |  | (90,237) | ​ |  | (80,072)
​ | ​ | $ | 112,145 | ​ | $ | 95,293
​
Schedule of accrued liabilities | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2022 |  | 2021
Accrued wages, commissions, bonuses and benefits | ​ | $ | 11,370 | ​ | $ | 10,056
Accrued products warranty | ​ |  | 2,098 | ​ |  | 3,076
Other | ​ |  | 14,436 | ​ |  | 9,647
​ | ​ | $ | 27,904 | ​ | $ | 22,779
​
Schedule of product warranty liability | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2022 |  | 2021
Accrual at beginning of the year | ​ | $ | 3,076 | ​ | $ | 3,373
Provision | ​ |  | 3,237 | ​ |  | 2,416
Settlement and Other | ​ |  | (4,215) | ​ |  | (2,713)
Accrual at end of year | ​ | $ | 2,098 | ​ | $ | 3,076
​

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- Definition Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 + Details
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- Definition Tabular disclosure of the carrying amount as of the balance sheet date of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(6)(c)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(6)(b)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(6)(a)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=6361739&loc=d3e7789-107766 + Details
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- Definition Tabular disclosure of the changes in the guarantor's aggregate product warranty liability, including the beginning balance of the aggregate product warranty liability, the aggregate reductions in that liability for payments made (in cash or in kind) under the warranty, the aggregate changes in the liability for accruals related to product warranties issued during the reporting period, the aggregate changes in the liability for accruals related to preexisting warranties (including adjustments related to changes in estimates), and the ending balance of the aggregate product warranty liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -URI https://asc.fasb.org/extlink&oid=126907703&loc=d3e12565-110249 + Details
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