Quarterly report pursuant to Section 13 or 15(d)

Short-Term Deposits (Details)

v3.20.2
Short-Term Deposits (Details)
 6 Months Ended
Jun. 30, 2020
Jun. 30, 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.  
Minimum [Member]    
Short-Term Deposits (Textual)    
Fixed annual interest bearing, percentage 0.50% 2.40%
Maximum [Member]    
Short-Term Deposits (Textual)    
Fixed annual interest bearing, percentage 1.58% 3.60%