LEASES - Quantitative Information About Operating Leases (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Operating lease expense summary:
Operating lease expense	$ 375,000	$ 55,000	$ 533,000	$ 165,000
Short-term lease expense		27,000	22,000	73,000
Variable lease expense	69,000	27,000	85,000	65,000
Total	$ 444,000	$ 109,000	$ 640,000	303,000
Other information
Operating cash flows from operating leases for the twelve months ended December 31, 2019				$ 362,000
Weighted-average remaining lease term as of December 31, 2019 - operating leases		9 years 7 months 6 days		9 years 7 months 6 days
Weighted-average discount rate as of adoption date - operating leases		5.70%		5.70%