LEASES - Right-of-use Assets and Lease Liabilities (Details) $ in Millions  | 
9 Months Ended | 
|---|---|
| 
 Sep. 30, 2019  
USD ($) 
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| Leases [Abstract] | |
| Cash paid for operating lease liabilities | $ 0.7 | 
| Weighted average remaining lease term (in months) | 6 years 7 months 27 days | 
| Weighted average discount rate | 6.50% | 
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- References No definition available. 
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- Definition Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- Definition Weighted average discount rate for operating lease calculated at point in time. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- Definition 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. Reference 1: http://www.xbrl.org/2003/role/exampleRef 
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