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General (Details Narrative) - USD ($)
$ in Thousands
3 Months Ended
Feb. 14, 2020
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Accumulated deficit   $ (94,303)   $ (93,399)
Net proceeds from issuance of common stock   $ 13,009  
Cash and cash equivalents   $ 8,887   $ 9,823
Private Placement [Member]        
Gross proceeds from issuance of common stock $ 15,000      
Net proceeds from issuance of common stock $ 13,009