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SIGNIFICANT ACCOUNTING POLICIES - Additional Information (Details) | 12 Months Ended
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Dec. 31, 2019 USD ($) item | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($)
Product Information [Line Items] |  |  |
Statutory federal income tax rate | 21.00% | 21.00% | 35.00%
Goodwill and Other Intangibles |  |  |
Goodwill | $ 3,308,000 | $ 3,308,000 |
Impairment of goodwill or trade names | $ 0 | 0 | $ 0
Earliest tax year |  |  |
Product Information [Line Items] |  |  |
Statutory federal income tax rate | 35.00% |  |
Latest tax year |  |  |
Product Information [Line Items] |  |  |
Statutory federal income tax rate | 21.00% |  |
Selling, general and administrative expenses |  |  |
Product Information [Line Items] |  |  |
Research and development costs | $ 730,000 | $ 822,000 | $ 960,000
Accounts Receivable |  |  |
Product Information [Line Items] |  |  |
Percentage of domestic shipments made pursuant to floor plan financing | 64.00% |  |
Supplier Concentration Risk |  |  |
Product Information [Line Items] |  |  |
Number of supplier | item | 4 |  |
Number of types of engines | item | 3 |  |

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- Definition The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 985 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128462-111756 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 730 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6420194&loc=d3e21568-108373 + Details
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