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LEASES - Narrative (Details)		3 Months Ended		6 Months Ended
	Jan. 01, 2019 USD ($) item	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Right-of-use assets	$ 750,000	$ 409,000		$ 409,000		$ 519,000
Lease liabilities	$ 750,000	420,000		420,000		$ 526,000
Operating leases				100,000	$ 100,000
Right-of-use assets obtained in exchange for lease obligations				0	750,000
Minimum
Lessee, Lease, Description [Line Items]
Facility leases | item	1
Renewal term	1 year
Maximum
Lessee, Lease, Description [Line Items]
Renewal term	5 years
Short-term lease costs		$ 100,000	$ 100,000	$ 100,000	$ 100,000
ASU 2016-02
Lessee, Lease, Description [Line Items]
Increase (decrease) in deferred rent and prepaid expenses	$ (6,000)
Current prepaid expense	6,000
Cumulative effect adjustment	$ 0

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Increase (decrease) in deferred rent and prepaid expenses.

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Number of options to renew under the operating leases.

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Amount of the cumulative effect on retained earnings net of related income tax effect.

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

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Present value of lessee's discounted obligation for lease payments from operating lease.

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Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.

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Amount of lessee's right to use underlying asset under operating lease.

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Amount of increase in right-of-use asset obtained in exchange for operating lease liability.

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Amount of short-term lease cost, excluding expense for lease with term of one month or less.

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