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NATURE OF OPERATIONS - Revenue Recognition (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Disaggregation of Revenue |  |  |  |
Product sales | $ 37,008 | $ 48,678 | $ 122,505 | $ 155,563
Dealer commission, reimbursed dealer expenses and other similar costs | 3,285 | 2,711 | $ 9,857 | 8,964
Annual curtail payment period |  |  | 2 years |
Period required to pay off remaining principle balance |  |  | 3 years |
Selling, general and administrative expenses |  |  |  |
Disaggregation of Revenue |  |  |  |
Warranty and contract costs | 666 | 861 | $ 2,024 | 1,941
Revenue from contract with customer product and service benchmark | Customer concentration risk | Pertaining to independent third parties |  |  |  |
Disaggregation of Revenue |  |  |  |
Product sales | $ 601 | $ 5,226 | $ 10,134 | $ 11,420
Concentration risk percentage | 1.70% | 10.70% | 8.80% | 7.30%
Revenue from contract with customer product and service benchmark | Customer concentration risk | Another independent third party and affiliates |  |  |  |
Disaggregation of Revenue |  |  |  |
Product sales | $ 3,202 | $ 2,307 | $ 4,894 | $ 3,711
Concentration risk percentage | 9.10% | 4.70% | 4.20% | 2.40%
Minimum |  |  |  |
Disaggregation of Revenue |  |  |  |
Term of lease agreement | 96 months |  | 96 months |
Maximum |  |  |  |
Disaggregation of Revenue |  |  |  |
Term of lease agreement | 120 months |  | 120 months |

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