Annual report pursuant to Section 13 and 15(d)

Subsequent events, Amended November 2019 Notes (Details)

v3.20.1
Subsequent events, Amended November 2019 Notes (Details) - Subsequent Event [Member]
Apr. 06, 2020
Jan. 06, 2020
Amended November 2019 Notes [Abstract]    
Long-term debt, interest rate 0.98%  
November 2019 Notes [Member]    
Amended November 2019 Notes [Abstract]    
Long-term debt, interest rate   12.00%