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OPERATING LEASES (Tables)

12 Months Ended

Dec. 31, 2019

Undiscounted future non-cancellable lease payments

The undiscounted future non-cancellable lease payments under the Menlo Park Lease, the New Jersey Lease and the Foster City Lease as of December 31, 2019 were as follows (in thousands):

2020		$	713
2021			913
2022			938
2023			962
2024			987
Thereafter			3,762
Total lease payments			8,275
Less: undiscounted lease payments   related to Foster City Lease			(4,427	)
Less: imputed interest			(1,294	)
Total		$	2,554

Menlo Park Lease and New Jersey Lease

Components of lease costs

The components of lease costs included in operating expenses for the Menlo Park Lease and the New Jersey Lease on our statements of operations were as follows:

		Year Ended December 31,
(In thousands)		2019				2018				2017
Operating lease costs		$	783			$	678			$	661
Variable lease costs (1)		17				31				35
Total lease costs		$	800			$	709			$	696

____________________________

(1) Variable lease costs represent non-lease components, such as common area maintenance charges.

X

- Definition

Tabular disclosure of lessee's lease cost. Includes, but is not limited to, interest expense for finance lease, amortization of right-of-use asset for finance lease, operating lease cost, short-term lease cost, variable lease cost and sublease income.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980

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X

- Definition

Tabular disclosure of undiscounted cash flows of lessee's operating lease liability. Includes, but is not limited to, reconciliation of undiscounted cash flows to operating lease liability recognized in statement of financial position.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918701-209980

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