Quarterly report pursuant to Section 13 or 15(d)

Prepayment from Customer (Details)

v3.21.1
Prepayment from Customer (Details) - Klingon Aerospace, Inc. [Member] - USD ($)
3 Months Ended 12 Months Ended
Mar. 09, 2015
Mar. 31, 2021
Dec. 31, 2020
Prepayment from Customer (Textual)      
Purchase agreement terms 10 years    
Purchase price of equipment $ 909,000 $ 762,000 $ 762,000