Quarterly report pursuant to Section 13 or 15(d)

Investments in Debt Securities - Fair value of available-for-sale debt securities (Details)

v3.20.2
Investments in Debt Securities - Fair value of available-for-sale debt securities (Details) - USD ($)
$ in Thousands
Sep. 30, 2020
Jun. 30, 2020
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling Maturity, Fair Value [Abstract]    
2021 $ 2,544  
2022 3,466  
Fair value $ 6,010 $ 0