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DEBT - Aggregate principal amount and interest rates (Details) - USD ($)	Jun. 30, 2020	Dec. 31, 2019
DEBT
Aggregate principal amount outstanding	$ 711,000
Notes payable to finance companies for insurance
DEBT
Aggregate principal amount outstanding	$ 711,000	$ 1,746,000
Notes payable to finance companies for insurance | Minimum
DEBT
Interest rate (as a percent)	4.05%	4.05%
Notes payable to finance companies for insurance | Maximum
DEBT
Interest rate (as a percent)	4.99%	4.99%

X

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ 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 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Balance Type:	na
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X

- 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.

+ Details

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X

- Definition

Represents the aggregate of total long-term debt, including current maturities and short-term debt.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	credit
Period Type:	instant

X

- Details

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- Details

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- Details

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