LEASES - Narrative (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) ft² term	Sep. 30, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Monthly rent			$ 21,400
Rent expense	$ 64,000	$ 59,000	$ 195,000	$ 188,000
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
Lease term	2 years		2 years
Renewal term	3 years		3 years
Renewal option | term			1
Monthly rent			$ 13,500
Related operating expenses, per month			12,300
Operating lease cost, including related operating cost	$ 75,000	$ 76,000	$ 223,000	$ 222,000