LEASES - Schedule of Lease Costs (Details) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)
Lease Cost
Operating lease cost	$ 185		$ 253
Variable lease cost	83		117
Total lease cost	268		370
Other Information
Operating cash flows used for operating leases	66		133
Net gain recognized from sale and leaseback transactions	$ 531	$ 0	$ 531	$ 0
Operating Leases
Weighted average discount rate	10.00%		10.00%
Weighted average remaining lease term (years)	8 years 7 months 3 days		8 years 7 months 3 days
Number of properties related to sale leaseback transactions	3
Proceeds from sale and leaseback transactions	$ 3,900		$ 3,873	$ 16

Number Of Properties Related To Sale Leaseback Transactions

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- Definition

Operating Leases [Abstract]

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- Definition

Amount of lease cost recognized by lessee for lease contract.

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- Definition

Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability.

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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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Weighted average discount rate for operating lease calculated at point in time.

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Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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- Definition

The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale.

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Amount of gain (loss) on sale and leaseback transaction from transfer of asset accounted for as sale.

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Amount of variable lease cost, excluded from lease liability, recognized when obligation for payment is incurred for finance and operating leases.

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