Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Research and Development Expenses (Details)

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Research and Development Expenses (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Research And Development Expenses      
Clinical and preclinical trials $ 10,290 $ 4,768 $ 3,809
Salary and related expenses 814 909 888
Patents 163 229 234
Royalties 11 14 11
Laboratory materials 40 73 63
Rent 51 51 51
Depreciation 5 3 3
Others (398) 28 47
Research and development expenses $ 10,976 $ 6,075 $ 5,106