Annual report pursuant to Section 13 and 15(d)

Short-Term Deposits (Details)

v3.21.1
Short-Term Deposits (Details)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Short-Term Deposits (Textual)    
Short-term deposits, description Short-term deposits represent time deposits placed with banks with original maturities of greater than three months but less than one year.  
Fixed annual interest   2.10%
Minimum [Member]    
Short-Term Deposits (Textual)    
Fixed annual interest 0.51%  
Maximum [Member]    
Short-Term Deposits (Textual)    
Fixed annual interest 1.58%