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INCOME TAXES (Schedule of Deferred Tax Assets and Liabilities) (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Income Tax Disclosure [Abstract]    
Operating loss carryforward $ 91,704 $ 86,068
Research and development 12,083 9,773
Accrued social benefits and other 3,123 2,801
Right of use assets (415) (520)
Lease liabilities 444 636
Property and equipment 2 2
Deferred tax asset before valuation allowance 106,941 98,760
Valuation allowance (106,941) (98,760)
Net deferred tax asset $ 0 $ 0