LEASES - Narrative (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2021 CAD ($) ft² term	Jun. 30, 2021 USD ($) ft² term	Jun. 30, 2020 USD ($)
Lessee, Lease, Description [Line Items]
Monthly rent				$ 20,100
Rent expense	$ 69,000	$ 65,000		$ 138,000	$ 131,000
Canada
Lessee, Lease, Description [Line Items]
Office space (in square feet) | ft²			31,100	31,100
Lease term	2 years		2 years	2 years
Renewal option | term			1	1
Renewal term	3 years		3 years	3 years
Monthly rent			$ 18,100	$ 14,600
Related operating expenses, per month			$ 18,200	14,700
Operating lease cost, including related operating cost	$ 84,000	$ 72,000		$ 166,000	$ 148,000