COMMITMENTS AND CONTINGENCIES - Narrative (Details)	12 Months Ended
	Dec. 31, 2019 USD ($) ft² renewal_term	Dec. 31, 2018 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Lease term	5 years
Number of additional terms | renewal_term	2
Renewal term	3 years
Area of leased property | ft²	3,038
Monthly payment, initial year	$ 4,430
Annual payment percentage increase	3.50%
Monthly fees	$ 2,160
Discount rate	12.00%
Expected remaining term	2 years 9 months 18 days
Amortization of operating lease right-of-use asset	$ 100,000
Remaining lease term	1 year 9 months 18 days
Lease expense	$ 100,000	$ 100,000