OPERATING LEASES (Details) - USD ($)	Mar. 10, 2020	Oct. 01, 2019	Sep. 30, 2020	Dec. 31, 2019	Oct. 31, 2019	Apr. 30, 2019
Lessee Lease Description [Line Items]
Operating lease, right-of-use assets			$ 5,425,000	$ 2,497,000
Operating lease liability			$ 5,794,000
New Jersey Office Space Lease
Lessee Lease Description [Line Items]
Operating lease, initial term						11 years
Operating lease term, option to extend additional period						5 years
Operating lease, right-of-use assets		$ 2,356,000
Operating lease liability		$ 2,356,000
Operating lease, rent abatement period		7 months
Operating lease, percentage of discount rate		8.00%
Foster City Office Space Lease
Lessee Lease Description [Line Items]
Operating lease, initial term					87 months
Operating lease term, option to extend additional period					5 years
Operating lease, right-of-use assets	$ 3,426,000
Operating lease liability	$ 3,426,000
Operating lease, rent abatement period	3 months
Operating lease, percentage of discount rate	7.00%