Schedule of Geographic Area Information (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Total revenues $ 4,341 $ 1,826
Total 4,872 5,630
UNITED STATES    
Total revenues 3,895 1,160
Total 548 1,035
Foreign [Member]    
Total revenues [1] 446 666
Total [2] $ 4,324 $ 4,595
[1] Foreign revenues are primarily generated from grants in Israel.
[2] Assets in foreign countries principally include laboratory equipment and leasehold improvements in Israel.