Annual report pursuant to Section 13 and 15(d)

DISCONTINUED OPERATIONS - Additional information (Details)

v3.20.4
DISCONTINUED OPERATIONS - Additional information (Details) - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2020
Dec. 31, 2019
Related Party Transaction [Line Items]      
Amounts due from related party, current   $ 474,257 $ 6,130,990
Amounts due from related party, long term   5,449,739 5,449,739
AerLine Holdings      
Related Party Transaction [Line Items]      
Rental income $ 2,419,000    
Amounts due from related party   5,924,000 11,581,000
Amounts due from related party, current   474,000 6,131,000
Amounts due from related party, long term   $ 5,450,000 $ 5,450,000
AerLine Holdings | Minimum      
Related Party Transaction [Line Items]      
Lease term   24 months  
AerLine Holdings | Maximum      
Related Party Transaction [Line Items]      
Lease term   60 months  
AerLine Holdings | Interest income      
Related Party Transaction [Line Items]      
Interest income from related party 850,000    
AerLine Holdings | Shared services agreements      
Related Party Transaction [Line Items]      
Revenue from related party 583,000    
AerLine Holdings | Goods and Services Agreements      
Related Party Transaction [Line Items]      
Revenue from related party $ 3,813,000