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Subsequent Events (Details) - Subsequent Event
$ in Millions
1 Months Ended
Apr. 01, 2021
USD ($)
aircraft
Apr. 30, 2021
shares
Chardan Capital Markets    
Subsequent Event [Line Items]    
Conversion of units, units converted (in units) | shares   344,988
Chardan Capital Markets | Common Stock    
Subsequent Event [Line Items]    
Shares issued, conversion of units (in shares) | shares   247,976
Aircraft Purchase Agreement    
Subsequent Event [Line Items]    
Number of aircrafts purchased | aircraft 1  
Aggregate purchase price $ 12.0  
Non-refundable deposit 0.5  
Event of seller default, liquidated damages recoverable $ 0.3