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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables) | 12 Months Ended
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Dec. 31, 2020
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |
Schedule of inventories, net of reserves | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, | ​ | December 31,
​ |  | 2020 |  | 2019
Chassis | ​ | $ | 6,859 | ​ | $ | 6,561
Raw materials | ​ |  | 36,161 | ​ |  | 39,444
Work in process | ​ |  | 16,282 | ​ |  | 16,520
Finished goods | ​ |  | 24,637 | ​ |  | 25,440
​ | ​ | $ | 83,939 | ​ | $ | 87,965
Schedule of property, plant and equipment | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2020 |  | 2019
Land and improvements | ​ | $ | 13,960 | ​ | $ | 13,953
Buildings and improvements | ​ |  | 83,320 | ​ |  | 73,121
Machinery and equipment | ​ |  | 53,787 | ​ |  | 50,235
Furniture and fixtures | ​ |  | 11,163 | ​ |  | 9,172
Software costs | ​ |  | 6,327 | ​ |  | 6,033
​ | ​ |  | 168,557 | ​ |  | 152,514
Less accumulated depreciation | ​ |  | (69,937) | ​ |  | (61,779)
​ | ​ | $ | 98,620 | ​ | $ | 90,735
Schedule of accrued liabilities | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2020 |  | 2019
Accrued wages, commissions, bonuses and benefits | ​ | $ | 10,510 | ​ | $ | 12,382
Accrued products warranty | ​ |  | 3,373 | ​ |  | 3,859
Accrued taxes | ​ |  | 2,164 | ​ |  | 2,079
Other | ​ |  | 8,726 | ​ |  | 9,493
​ | ​ | $ | 24,773 | ​ | $ | 27,813
Schedule of product warranty liability | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2020 |  | 2019
Accrual at beginning of the year | ​ | $ | 3,859 | ​ | $ | 3,752
Provision | ​ |  | 2,915 | ​ |  | 2,483
Settlement and Other | ​ |  | (3,401) | ​ |  | (2,376)
Accrual at end of year | ​ | $ | 3,373 | ​ | $ | 3,859

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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 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(13)) -URI http://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 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://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 http://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 http://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 http://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 http://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 http://asc.fasb.org/extlink&oid=68068213&loc=d3e12565-110249 + Details
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