LEASES - Narrative (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($) ft² term	Jun. 30, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Monthly rent			$ 21,400
Rent expense	$ 65,000	$ 53,000	$ 131,000	$ 129,000
Minimum
Lessee, Lease, Description [Line Items]
Lease term	4 months		4 months
Maximum
Lessee, Lease, Description [Line Items]
Lease term	9 months		9 months
Canada
Lessee, Lease, Description [Line Items]
Office space (in square feet) | ft²			31,100
Renewal option | term			1
Renewal term	5 years		5 years
Monthly rent			$ 12,800
Related operating expenses, per month			12,500
Operating lease cost, including related operating cost	$ 72,000	$ 71,000	$ 148,000	$ 146,000