OPERATING LEASES (Details) - USD ($)	Mar. 10, 2020	Oct. 01, 2019	Sep. 10, 2019	Dec. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Oct. 31, 2019	Apr. 30, 2019
Lessee Lease Description [Line Items]
Operating Lease, Right-of-Use Asset				$ 4,727,000	$ 5,295,000
Menlo Park Office Space Lease
Lessee Lease Description [Line Items]
Operating lease term, additional period extension			2 months
Operating Lease, Percentage of Discount Rate						5.00%
Operating Lease, Right-of-Use Asset						$ 149,000
Operating Lease, Liability						$ 149,000
New Jersey Office Space Lease
Lessee Lease Description [Line Items]
Operating Lease, Percentage of Discount Rate		8.00%
Operating Lease, Right-of-Use Asset		$ 2,356,000
Operating Lease, Liability		$ 2,356,000
Operating lease, initial term		11 years						11 years
Operating lease term, option to extend additional period								5 years
Operating lease term, option to terminate lease		one-time option to terminate the New Jersey Lease without cause as of the 103rd month anniversary of the commencement date of the lease
Operating lease, rent abatement period		7 months
Operating lease,remaining lease term				8 years 9 months 18 days
Foster City Office Space Lease
Lessee Lease Description [Line Items]
Operating Lease, Percentage of Discount Rate	7.00%
Operating Lease, Right-of-Use Asset	$ 3,426,000
Operating Lease, Liability	$ 3,426,000
Operating lease, initial term	87 months						87 months
Operating lease term, option to extend additional period							5 years
Operating lease, rent abatement period	3 months
Operating lease,remaining lease term				5 years 6 months