Quarterly report pursuant to Section 13 or 15(d)

Short-Term Investment and Restricted Cash (Details)

v3.21.1
Short-Term Investment and Restricted Cash (Details)
3 Months Ended
Mar. 31, 2021
USD ($)
shares
Mar. 31, 2021
EUR (€)
shares
Dec. 31, 2020
USD ($)
Dec. 31, 2020
EUR (€)
Sep. 09, 2019
USD ($)
Sep. 09, 2019
EUR (€)
Short-term investment $ 75,840   $ 87,154   $ 225,500  
Purchase of common stock (unaudited) | shares 11,135 11,135        
Fair value amount (unaudited) $ 75,840          
Short-term investment with accumulated unrealized loss $ 151,232          
Remaining cash balance (unaudited)     $ 1,511      
Euro [Member]            
Short-term investment | €           € 200,000
Compensation paid in advance | €   € 20,000        
Remaining cash balance (unaudited) | €       € 1,287