NATURE OF OPERATIONS - Revenue Recognition (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2021	Mar. 31, 2020
Disaggregation of Revenue
Incremental costs of obtaining a contract	true
Product sales	$ 32,274	$ 31,195
Dealer commission, reimbursed dealer expenses and other similar costs	2,182	4,907
Revenue from contract with customer product and service benchmark \| Customer concentration risk \| Independent third party and affiliates
Disaggregation of Revenue
Product sales	$ 2,664	$ 11,986
Concentration risk percentage	8.30%	37.20%
Minimum
Disaggregation of Revenue
Term of lease agreement	96 months
Maximum
Disaggregation of Revenue
Term of lease agreement	120 months

Represents the amount of dealer commission, reimbursed dealer expenses and other similar costs.

No definition available.

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Term of lessor's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
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- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

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- Definition

Indicates (true false) whether practical expedient was elected to recognize incremental cost of obtaining contract as expense when incurred if amortization period would have been one year or less.

+ References

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